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Kazadi C, Ducruet T, Forté S, Robitaille N, Pastore Y. Positive impacts of universal newborn screening on the outcome of children with sickle cell disease in the province of Quebec: A retrospective cohort study. EJHAEM 2024; 5:447-454. [PMID: 38895082 PMCID: PMC11182396 DOI: 10.1002/jha2.926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 04/28/2024] [Accepted: 05/01/2024] [Indexed: 06/21/2024]
Abstract
A universal newborn screening program for sickle cell disease (uNS-SCD) was implemented in the province of Québec (Qc) in November 2013, close in time to the recommendation of early initiation of hydroxyurea (HU) therapy for children. This retrospective cohort study evaluated the impact of such a program on children first seen between January 2000 and December 2019. Cohorts pre-SCD-uNS in Qc (pre-QcNS) (n = 253) and post-QcNS (n = 157) for patients seen prior to or after Nov 2013 were compared. Kaplan-Meier curves, Poisson regression, and logistic regressions were used for statistical analysis, using Software R version 4.2.1. Median age at first visit decreased significantly from 14.4 [interquartile range: 2.4-72.0] to 1.2 months [1.2-57.6] (p < 0.001). The percentage of children born in Qc undiagnosed at birth and referred after a first SCD-related complication dropped from 42.6% to 0.0% (p < 0.0001). The median age of HU introduction for patients with SS/Sβ°-thalassemia decreased from 56.4 [31.2-96.0] to 9.0 months post-QcNS [8.0-12.1] (p < 0.001). Event-free survival improved significantly for any type of hospitalization as well as for vaso-occlusive crisis (VOC) (140-257 days (p < 0.001) and 1320 vs. 573 days (p < 0.002), respectively), resulting in a reduction from 2 [interquartile range: 1.0-3.0] to 1.0 hospitalizations/patient-year [0.6-1.4] (p < 0.001). Children with SS/Sβ°-thalassemia referred post-QcNS also had fewer emergency department visits for VOC (RR: 0.69, 95% confidence interval: 0.54-0.88). The Universal NS program allows early detection and referral of children with SCD to comprehensive care centers. Earlier access ensures that children benefit from essential preventive interventions, reducing disease burden. This cohort study highlights that uNS-SCD is an essential public health measure.
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Affiliation(s)
- Costa Kazadi
- Department of PediatricsDivision of Hematology‐OncologyCentre Hospitalier Universitaire Sainte‐JustineMontrealCanada
- Department of MedicineDivision of Hematology‐OncologyCHUMMontrealCanada
| | - Thierry Ducruet
- Unité de Recherche Clinique Appliquée (URCA)Centre Hospitalier Universitaire Sainte‐Justine Research CenterMontrealCanada
| | - Stéphanie Forté
- Department of PediatricsDivision of Hematology‐OncologyCentre Hospitalier Universitaire Sainte‐JustineMontrealCanada
- Department of MedicineDivision of Hematology‐OncologyCHUMMontrealCanada
- Carrefour de l'InnovationCHUMMontrealCanada
| | - Nancy Robitaille
- Department of PediatricsDivision of Hematology‐OncologyCentre Hospitalier Universitaire Sainte‐JustineMontrealCanada
- University of MontréalMontrealCanada
- Hema‐QuebecTransfusion MedicineMontrealCanada
| | - Yves Pastore
- Department of PediatricsDivision of Hematology‐OncologyCentre Hospitalier Universitaire Sainte‐JustineMontrealCanada
- University of MontréalMontrealCanada
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2
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Ellison V, Berlin KS, Longoria J, Potter B, Raches D, Hankins JS, Takemoto C, Heitzer AM. Empirically derived profiles of neurocognitive functioning in youth and young adults with sickle cell disease. J Pediatr Psychol 2024:jsae029. [PMID: 38623054 DOI: 10.1093/jpepsy/jsae029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/17/2024] Open
Abstract
OBJECTIVE Sickle cell disease (SCD) is an inherited blood disorder associated with neurocognitive deficits. In contrast to variable-centered approaches, no known research has utilized person-centered strategies to identify multidimensional patterns of neurocognitive functioning of an individual with SCD. The purpose of the present study was to create empirically derived profiles and identify predictors of neurocognitive functioning subgroups among youth and young adults with SCD. METHODS Individuals with SCD (N = 393, mean age 14.05 years, age range 8-24, 50.4% female/49.6% male) completed neurocognitive assessments. Latent profile analysis derived subgroups/classes of neurocognitive functioning and determined relations with demographic and medical variables. RESULTS Three latent classes emerged: average functioning (n = 102, 27%), low average functioning (n = 225, 60%), and exceptionally low functioning (n = 46, 12%). Older age was associated with membership in the low average and exceptionally low functioning groups (relative to the average group). Being prescribed hydroxyurea was associated with membership in the average functioning group (relative to the low average group) and absence of hydroxyurea use was associated with membership in the exceptionally low group (relative to the low average group). Lower social vulnerability was associated with membership in the average functioning group compared to the low average and exceptionally low groups. CONCLUSIONS Clinicians can help reduce disparities in cognitive development for individuals with SCD by promoting early treatment with hydroxyurea and implementing methods to reduce social vulnerabilities that can interfere with access to evidence-based care.
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Affiliation(s)
- Vinkrya Ellison
- Department of Psychology and Biobehavioral Sciences, St Jude Children's Research Hospital, Memphis, TN, United States
- The Department of Psychology, The University of Memphis, Memphis, TN, United States
- The Department of Pediatrics, University of Tennessee Health Sciences Center, Memphis, TN, United States
| | - Kristoffer S Berlin
- The Department of Psychology, The University of Memphis, Memphis, TN, United States
- The Department of Pediatrics, University of Tennessee Health Sciences Center, Memphis, TN, United States
| | - Jennifer Longoria
- Department of Psychology and Biobehavioral Sciences, St Jude Children's Research Hospital, Memphis, TN, United States
| | - Brian Potter
- Department of Psychology and Biobehavioral Sciences, St Jude Children's Research Hospital, Memphis, TN, United States
| | - Darcy Raches
- Department of Psychology and Biobehavioral Sciences, St Jude Children's Research Hospital, Memphis, TN, United States
| | - Jane S Hankins
- Department of Hematology, St Jude Children's Research Hospital, Memphis, TN, United States
- Department of Global Pediatric Medicine, St Jude Children's Research Hospital, Memphis, TN, United States
| | - Clifford Takemoto
- Department of Hematology, St Jude Children's Research Hospital, Memphis, TN, United States
| | - Andrew M Heitzer
- Department of Psychology and Biobehavioral Sciences, St Jude Children's Research Hospital, Memphis, TN, United States
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Allali S, Galactéros F, Oevermann L, Cannas G, Joseph L, Loko G, Elenga N, Benkerrou M, Etienne-Julan M, Castex MP, Brousse V, de Montalembert M. Hydroxyurea is associated with later onset of acute splenic sequestration crisis in sickle cell disease: Lessons from the European Sickle Cell Disease Cohort-Hydroxyurea (ESCORT-HU) study. Am J Hematol 2024; 99:555-561. [PMID: 38247384 DOI: 10.1002/ajh.27214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 12/22/2023] [Accepted: 01/01/2024] [Indexed: 01/23/2024]
Abstract
Acute splenic sequestration crisis (ASSC) is a potentially life-threatening complication of sickle cell disease (SCD), typically occurring in young patients under 5 years of age, with a median age at first episode of less than 2 years. Because a beneficial effect of hydroxyurea (HU) on spleen perfusion and splenic function has been suspected, we hypothesized that HU treatment might be associated with later onset of ASSC in patients with SCD. To investigate this hypothesis, we analyzed data from the ESCORT-HU study on a large cohort of patients with SCD receiving HU, enrolled between January 2009 and June 2017 with a follow-up of 7309 patient-years of observation. The median age at ASSC of the 14 patients who experienced a first episode of ASSC during the study period was 8.0 [IQR: 5.0-24.1] years. The median age at HU initiation was significantly lower in these 14 patients (4.8 [IQR: 3.3-18.7] years) compared to the 1664 patients without ASSC (19.9 [8.8-33.4] years, p = .0008). These findings suggest that ASSC may occur at an unusually late age in patients receiving HU, possibly reflecting longer preservation of spleen perfusion and function secondary to early initiation of HU. Further studies are needed to better characterize the effects of HU on spleen perfusion/function and on the occurrence of ASSC in patients with SCD (ClinicalTrials.gov identifier: NCT02516579; European registry ENCEPP/SDPP/10565).
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Affiliation(s)
- Slimane Allali
- Department of General Pediatrics and Pediatric Infectious Diseases, Reference Center for Sickle Cell Disease, Necker-Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Université Paris Cité, Paris, France
| | - Frédéric Galactéros
- Department of Internal Medicine, Sickle Cell Referral Center, Henri-Mondor University Hospital-UPEC, AP-HP, Créteil, France
| | - Lena Oevermann
- Department of Pediatric Oncology and Hematology, Charité University Medicine, Berlin and Berlin Institute of Health, Berlin, Germany
| | - Giovanna Cannas
- Hospices Civils de Lyon, Hôpital Edouard Herriot, Médecine Interne, Centre de Référence Constitutif: Syndromes Drépanocytaires Majeurs, Thalassémies et Autres Pathologies Rares du Globule Rouge et de l'Erythropoïèse, Lyon, France
| | - Laure Joseph
- Biotherapy Department, Necker-Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Université Paris Cité, Paris, France
| | - Gylna Loko
- Centre Hospitalier Universitaire de Martinique, Centre de Référence Constitutif: Syndromes Drépanocytaires Majeurs, Thalassémies et Autres Pathologies Rares du Globule Rouge et de l'Érythropoïèse des Antilles et de la Guyane, Le Lamentin, Martinique, France
| | - Narcisse Elenga
- Centre Hospitalier de Cayenne, Centre de Référence Constitutif: Syndromes Drépanocytaires Majeurs, Thalassémies et Autres Pathologies Rares du Globule Rouge et de l'Erythropoïèse, Cayenne, French Guiana
| | - Malika Benkerrou
- Centre de Référence MCGRE, Service d'Hématologie-Immunologie, AP-HP, Hôpital Robert Debré, Inserm, UMR-1123 ECEVE, Université Paris Cité, Paris, France
| | - Maryse Etienne-Julan
- Unité Transversale de la Drépanocytose, Centre de Référence Maladies Rares pour la Drépanocytose aux Antilles-Guyane, CHU de Pointe-à-Pitre, Pointe-à-Pitre, Guadeloupe, France
| | - Marie-Pierre Castex
- Pediatric Oncology Immunology Hematology Unit, Children's University Hospital - Toulouse University Hospital, Toulouse, France
| | - Valentine Brousse
- Department of General Pediatrics and Pediatric Infectious Diseases, Reference Center for Sickle Cell Disease, Necker-Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Université Paris Cité, Paris, France
- Centre de Référence MCGRE, Service d'Hématologie-Immunologie, AP-HP, Hôpital Robert Debré, Inserm, UMR-1123 ECEVE, Université Paris Cité, Paris, France
| | - Mariane de Montalembert
- Department of General Pediatrics and Pediatric Infectious Diseases, Reference Center for Sickle Cell Disease, Necker-Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Université Paris Cité, Paris, France
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4
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Santos B, Ginete C, Gonçalves E, Delgadinho M, Miranda A, Faustino P, Arez AP, Brito M. Characterization of a cohort of Angolan children with sickle cell anemia treated with hydroxyurea. Blood Cells Mol Dis 2024; 105:102822. [PMID: 38215581 DOI: 10.1016/j.bcmd.2023.102822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 12/26/2023] [Accepted: 12/28/2023] [Indexed: 01/14/2024]
Abstract
BACKGROUND Sickle Cell Anemia (SCA) is a monogenic disease, although its severity and response to treatment are very heterogeneous. OBJECTIVES This study aims to characterize a cohort of Angolan children with SCA and evaluate their response to hydroxyurea (HU) treatment and the potential side effects and toxicity. METHODS The study enrolled 215 patients between 3 and 12 years old before and after the administration of HU, at a fix dose of 20 mg/kg/day for 12 months. RESULTS A total of 157 patients started HU medication and 141 of them completed the 12-month treatment. After initiating HU treatment, the frequency of clinical events decreased (transfusions 53.4 %, hospitalizations 47.1 %). The response to HU medication varied among patients, with some experiencing an increase in fetal hemoglobin (HbF) of <5 %. The mean increase in HbF was 11.9 %, ranging from 1.8 % to 31 %. Responders to HU treatment were 57 %, inadequate responders 38.7 % and non-adherent 4.2 %. No clinical side effects related to HU were reported. Hematological toxicities were transient and reversible. Children naïve to HU and with lower HbF reported higher number of hospitalizations caused by malaria infection. During HU treatment, the frequency of malaria episodes did not appear to be affected by HbF levels. CONCLUSIONS the present study provided a valuable contribution to the understanding of the clinical and laboratory profiles of Angolan children with SCA. These findings support the evidence that the implementation of prophylactic measures and treatment with HU is associated with increased survival in children with SCA.
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Affiliation(s)
- Brígida Santos
- Centro de Investigação em Saúde de Angola (CISA), Caxito, Angola; Hospital Pediátrico David Bernardino (HPDB), Luanda, Angola; Global Health and Tropical Medicine (GHTM), Associate Laboratory in Translation and Innovation Towards Global Health (LA-REAL), Instituto de Higiene e Medicina Tropical (IHMT), Universidade NOVA de Lisboa (UNL), Lisbon, Portugal
| | - Catarina Ginete
- H&TRC - Health & Technology Research Center, ESTeSL - Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, Lisbon, Portugal
| | - Elisângela Gonçalves
- Global Health and Tropical Medicine (GHTM), Associate Laboratory in Translation and Innovation Towards Global Health (LA-REAL), Instituto de Higiene e Medicina Tropical (IHMT), Universidade NOVA de Lisboa (UNL), Lisbon, Portugal
| | - Mariana Delgadinho
- H&TRC - Health & Technology Research Center, ESTeSL - Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, Lisbon, Portugal
| | - Armandina Miranda
- Instituto Nacional de Saúde Doutor Ricardo Jorge (INSA), Lisbon, Portugal
| | - Paula Faustino
- Instituto Nacional de Saúde Doutor Ricardo Jorge (INSA), Lisbon, Portugal; Instituto de Saúde Ambiental (ISAMB), Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal; Laboratório Associado TERRA, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
| | - Ana Paula Arez
- Global Health and Tropical Medicine (GHTM), Associate Laboratory in Translation and Innovation Towards Global Health (LA-REAL), Instituto de Higiene e Medicina Tropical (IHMT), Universidade NOVA de Lisboa (UNL), Lisbon, Portugal
| | - Miguel Brito
- Centro de Investigação em Saúde de Angola (CISA), Caxito, Angola; H&TRC - Health & Technology Research Center, ESTeSL - Escola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, Lisbon, Portugal.
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5
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García-Morin M, Bardón-Cancho EJ, Beléndez C, Dulín E, Blanco-Soto P, Puertas-López C, Prieto-Medina M, Cervera-Bravo Á, Llorente-Otones L, Pérez-Alonso V, San-Román S, Vecilla-Rivelles C, López-Rubio M, Sebastián E, Bellón JM, Cela E. Madrid Newborn Sickle Cell Disease Cohort: clinical outcomes, stroke prevention and survival. Ann Hematol 2024; 103:373-383. [PMID: 37980280 DOI: 10.1007/s00277-023-05539-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 11/03/2023] [Indexed: 11/20/2023]
Abstract
In May 2003, Madrid established the universal newborn screening (NBS) for sickle cell disease (SCD). However, there are no studies resembling the evolution of a SCD neonate cohort followed according to national guidelines in Spain. The aim of this study is to describe the morbimortality and the stroke prevention programme in patients diagnosed by SCD NBS in Madrid. This is a multicentre, observational, prospective cohort study between 2003 and 2018; 187 patients diagnosed with SCD were included (151 HbSS, 6 HbSβ0, 27 HbSC, 3 HbSβ +), and median follow-up was 5.2 years (0.03-14.9). There were 5 deaths: 2 related to SCD in patients with severe genotype (HbSS/HbSβ0). Overall survival reached 95% and SCD-related survival 96.8%. The most frequent events were fever without focus, vaso-occlusive crises and acute chest syndromes. Eight strokes occurred in 5 patients which led to a 90.7% stroke-free survival in severe genotype patients (first stroke rate, 0.54 per 100 patient-years). Transcranial Doppler (TCD) was performed in 95% of eligible patients; 75% of children with pathological TCD remained stroke-free. Regarding HbSS/HbSβ0 patients, 50.1% received hydroxyurea and 9.5% haematopoietic stem cell transplantation. This study reflects the evolution of Madrid SCD cohort and provides morbimortality data similar to other developed countries.
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Affiliation(s)
- Marina García-Morin
- Pediatric Oncology/Hematology/BMT Unit, Pediatric Department, Facultad de Medicina, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, C/ Maiquez, 9, 28007, Madrid, Spain
- Instituto Investigación Sanitaria Gregorio Marañón, Madrid, Spain
| | - Eduardo J Bardón-Cancho
- Pediatric Oncology/Hematology/BMT Unit, Pediatric Department, Facultad de Medicina, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, C/ Maiquez, 9, 28007, Madrid, Spain.
- Instituto Investigación Sanitaria Gregorio Marañón, Madrid, Spain.
| | - Cristina Beléndez
- Pediatric Oncology/Hematology/BMT Unit, Pediatric Department, Facultad de Medicina, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, C/ Maiquez, 9, 28007, Madrid, Spain
- Instituto Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Elena Dulín
- Newborn Screening Laboratory, Hospital General Universitario Gregorio Marañón, C/Maiquez, 9, 28007, Madrid, Spain
| | - Paula Blanco-Soto
- Newborn Screening Laboratory, Hospital General Universitario Gregorio Marañón, C/Maiquez, 9, 28007, Madrid, Spain
| | - Carolina Puertas-López
- Newborn Screening Laboratory, Hospital General Universitario Gregorio Marañón, C/Maiquez, 9, 28007, Madrid, Spain
| | - Mar Prieto-Medina
- Nursery, Sickle Cell Disease Newborn Screening, Pediatric Department, Pediatric Oncology/Hematology/BMT Unit, Madrid, Spain
| | - Áurea Cervera-Bravo
- Hematology Unit, Pediatric Department, Hospital Universitario de Móstoles, Móstoles, Madrid, Spain
| | - Lucía Llorente-Otones
- Hematology Unit, Pediatric Department, Hospital Universitario de Fuenlabrada, Fuenlabrada, Madrid, Spain
| | - Vanesa Pérez-Alonso
- Pediatric Oncology and Hematology Unit, Pediatric Department, Hospital Universitario 12 de Octubre, Madrid, Spain
| | - Sonsoles San-Román
- Pediatric Oncology and Hematology Department, Hospital Universitario La Paz, Madrid, Spain
| | - Cruz Vecilla-Rivelles
- Hematology Unit, Pediatric Department, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid, Spain
| | - Montserrat López-Rubio
- Hematology Department, Hospital Universitario Príncipe de Asturias, Alcalá de Henares, Madrid, Spain
| | - Elena Sebastián
- Pediatric Oncology and Hematology Department, Hospital Infantil Niño Jesús, Madrid, Spain
| | - José M Bellón
- Instituto Investigación Sanitaria Gregorio Marañón, Madrid, Spain
| | - Elena Cela
- Pediatric Oncology/Hematology/BMT Unit, Pediatric Department, Facultad de Medicina, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, C/ Maiquez, 9, 28007, Madrid, Spain
- Instituto Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Instituto Nacional de Investigación Biomédica en Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
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Lobo C, Araújo A, Antunes ADA, Pinto ACS, Godinho AC, Pires CSM, Matheus CC, Albuquerque XD, Neves DCF, Moreno FDL, Baldanzi G, Siufi GC, Miranda HHP, Hankins J, Aragão J, Braga JAP, Martins JTN, Souza LCCMD, Figueiredo MS, Oliveira MR, Cardoso PSR, Pinto PCA, Moura PG, Cançado RD, Araujo PICD, Saad SO, Loggetto SR, Fonseca TCC. Consensus of the Brazilian Association of Hematology, Hemotherapy and Cellular Therapy (ABHH) and the Brazilian Ministry of Health - General management of blood and blood products on the tests necessary for the release of exceptional medicines for sickle cell disease. Hematol Transfus Cell Ther 2024; 46:67-71. [PMID: 38326179 PMCID: PMC10935471 DOI: 10.1016/j.htct.2024.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 02/09/2024] Open
Abstract
To date, hydroxyurea is the only effective and safe drug that significantly reduces morbidity and mortality of individuals with Sickle cell disease. Twenty years of real-life experience has demonstrated that hydroxyurea reduces pain attacks, vaso-occlusive events, including acute chest syndrome, the number and duration of hospitalizations and the need for transfusion. The therapeutic success of hydroxyurea is directly linked to access to the drug, the dose used and adherence to treatment which, in part, is correlated to the availability of hydroxyurea. This consensus aims to reduce the number of mandatory exams needed to access the drug, prioritizing the requesting physician's report, without affecting patient safety.
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Affiliation(s)
- Clarisse Lobo
- Hemocentro Coordenador do Estado do Rio de Janeiro (HEMORIO), Rio de Janeiro, RJ, Brazil.
| | - Aderson Araújo
- Fundação de Hematologia e Hemoterapia de Pernambuco (HEMOPE) Recife, PE, Brazil
| | | | | | | | | | | | - Xerez de Albuquerque
- Fundação de Hematologia e Hemoterapia do Amazonas, Secretaria de Saúde do Amazonas, Manaus, AM, Brazil
| | | | | | - Giorgio Baldanzi
- Hospital de Clínicas da Universidade Federal do Paraná, Curitiba, PR, Brazil
| | | | | | - Jane Hankins
- St. Jude Children's Research Hospital, Menphis, TN, USA
| | - Joice Aragão
- Coordenação Geral de Sangue e Hemoderivados do Ministério da Saúde, Brasilia, DF, Brazil
| | | | | | | | | | | | | | | | - Patricia Gomes Moura
- Hemocentro Coordenador do Estado do Rio de Janeiro (HEMORIO), Rio de Janeiro, RJ, Brazil
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7
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Hankins JS, Brambilla D, Potter MB, Kutlar A, Gibson R, King AA, Baumann AA, Melvin C, Gordeuk VR, Hsu LL, Nwosu C, Porter JS, Alberts NM, Badawy SM, Simon J, Glassberg JA, Lottenberg R, DiMartino L, Jacobs S, Fernandez ME, Bosworth HB, Klesges LM, Shah N. A multilevel mHealth intervention boosts adherence to hydroxyurea in individuals with sickle cell disease. Blood Adv 2023; 7:7190-7201. [PMID: 37738155 PMCID: PMC10698253 DOI: 10.1182/bloodadvances.2023010670] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 09/05/2023] [Accepted: 09/05/2023] [Indexed: 09/24/2023] Open
Abstract
Hydroxyurea reduces sickle cell disease (SCD) complications, but medication adherence is low. We tested 2 mobile health (mHealth) interventions targeting determinants of low adherence among patients (InCharge Health) and low prescribing among providers (HU Toolbox) in a multi-center, non-randomized trial of individuals with SCD ages 15-45. We compared the percentage of days covered (PDC), labs, healthcare utilization, and self-reported pain over 24 weeks of intervention and 12 weeks post-study with a 24-week preintervention interval. We enrolled 293 patients (51% male; median age 27.5 years, 86.8% HbSS/HbSβ0-thalassemia). The mean change in PDC among 235 evaluable subjects increased (39.7% to 56.0%; P < 0.001) and sustained (39.7% to 51.4%, P < 0.001). Mean HbF increased (10.95% to 12.78%; P = 0.03). Self-reported pain frequency reduced (3.54 to 3.35 events/year; P = 0.041). InCharge Health was used ≥1 day by 199 of 235 participants (84.7% implementation; median usage: 17% study days; IQR: 4.8-45.8%). For individuals with ≥1 baseline admission for pain, admissions per 24 weeks declined from baseline through 24 weeks (1.97 to 1.48 events/patient, P = 0.0045) and weeks 25-36 (1.25 events/patient, P = 0.0015). PDC increased with app use (P < 0.001), with the greatest effect in those with private insurance (P = 0.0078), older subjects (P = 0.033), and those with lower pain interference (P = 0.0012). Of the 89 providers (49 hematologists, 36 advanced care providers, 4 unreported), only 11.2% used HU Toolbox ≥1/month on average. This use did not affect change in PDC. Tailoring mHealth solutions to address barriers to hydroxyurea adherence can potentially improve adherence and provide clinical benefits. A definitive randomized study is warranted. This trial was registered at www.clinicaltrials.gov as #NCT04080167.
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Affiliation(s)
- Jane S Hankins
- Department of Global Pediatric Medicine, St. Jude Children's Research Hospital, Memphis, TN
- Center for Sickle Cell Disease, University of Tennessee Health Science Center, Memphis, TN
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, TN
| | | | - Michael B Potter
- Department of Family and Community Medicine, University of California San Francisco School of Medicine, San Francisco, CA
| | - Abdullah Kutlar
- Center for Blood Disorders, Medical College of Georgia, Augusta University, Augusta, GA
| | - Robert Gibson
- Center for Blood Disorders, Medical College of Georgia, Augusta University, Augusta, GA
| | - Allison A King
- Department of Pediatrics, Washington University in St. Louis, St. Louis, MO
- Division of Public Health Sciences, Department of Surgery, Washington University, St. Louis, MO
| | - Ana A Baumann
- Division of Public Health Sciences, Department of Surgery, Washington University, St. Louis, MO
| | - Cathy Melvin
- Department of Public Health Sciences, College of Medicine, Medical University of South Carolina, Charleston, SC
| | - Victor R Gordeuk
- Sickle Cell Center, University of Illinois at Chicago, Chicago, IL
| | - Lewis L Hsu
- Sickle Cell Center, University of Illinois at Chicago, Chicago, IL
| | - Chinonyelum Nwosu
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, TN
| | - Jerlym S Porter
- Department of Psychology and Biobehavioral Sciences, St. Jude Children's Research Hospital, Memphis, TN
| | - Nicole M Alberts
- Department of Psychology, Concordia University, Montreal, QC, Canada
| | - Sherif M Badawy
- Division of Hematology, Oncology, and Stem Cell Transplant, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL
- Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Jena Simon
- Department of Emergency Medicine, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Jeffrey A Glassberg
- Department of Emergency Medicine, Icahn School of Medicine at Mount Sinai, New York, NY
| | | | | | - Sara Jacobs
- RTI International, Research Triangle Park, NC
| | - Maria E Fernandez
- Health Promotion and Behavioral Sciences, School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX
| | - Hayden B Bosworth
- Department of Population Health Studies, Duke University, Durham, NC
- Center of Innovation to Accelerate Discovery and Practice Transformation Durham Veterans Affairs Medical Center, Durham, NC
| | - Lisa M Klesges
- Division of Public Health Sciences, Department of Surgery, Washington University, St. Louis, MO
| | - Nirmish Shah
- Department of Pediatric Hematology and Oncology, Duke University, Durham, NC
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8
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Jacob SA, Talati R, Kanter J. The evolving treatment landscape for children with sickle cell disease. THE LANCET. CHILD & ADOLESCENT HEALTH 2023; 7:797-808. [PMID: 37858508 DOI: 10.1016/s2352-4642(23)00201-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 07/26/2023] [Accepted: 07/31/2023] [Indexed: 10/21/2023]
Abstract
Sickle cell disease is the most common inherited pathological haemoglobinopathy. Over the past 30 years, disease-related morbidity and mortality have improved in high-income countries due to advances in preventive care and treatments. Established disease-modifying therapies, such as hydroxyurea (hydrocarbamide), are continuing to have an important role in the treatment of sickle cell disease, and newer agents also show promise. In the past 5 years, the US Food and Drug Administration approved three additional sickle cell disease-modifying medications, and new gene therapies have been developed as an alternative curative treatment to haematopoietic stem-cell transplantation. In this Review, we discuss the current treatment landscape for paediatric sickle cell disease and emerging innovations in care. We also review the need for close, long-term management for children receiving newer therapies and the importance of ongoing investment in people with sickle cell disease in low-income and middle-income countries.
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Affiliation(s)
- Seethal A Jacob
- Division of Pediatric Hematology Oncology, Riley Hospital for Children, Indianapolis, IN, USA
| | - Ravi Talati
- Division of Pediatric Hematology, Oncology & Blood/Marrow Transplantation, Cleveland Clinic Children's Hospital, Cleveland, OH, USA
| | - Julie Kanter
- Lifespan Comprehensive Sickle Cell Center, University of Alabama, Birmingham, AL, USA.
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9
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Smart LR, Segbefia CI, Latham TS, Stuber SE, Amissah-Arthur KN, Dzefi-Tettey K, Lane AC, Dei-Adomakoh YA, Ware RE. Prospective identification of variables as outcomes for treatment (PIVOT): study protocol for a randomised, placebo-controlled trial of hydroxyurea for Ghanaian children and adults with haemoglobin SC disease. Trials 2023; 24:603. [PMID: 37737189 PMCID: PMC10515018 DOI: 10.1186/s13063-023-07649-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 09/13/2023] [Indexed: 09/23/2023] Open
Abstract
BACKGROUND Haemoglobin SC (HbSC) is a common form of sickle cell disease (SCD), especially among individuals of West African ancestry. Persons with HbSC disease suffer from the same clinical complications and reduced quality of life that affect those with sickle cell anaemia (HbSS/Sβ0). Retrospective anecdotal data suggest short-term safety and benefits of hydroxyurea for treating HbSC, yet rigorous prospective data are lacking regarding optimal dosing, clinical and laboratory effects, long-term safety and benefits, and appropriate endpoints to monitor. Prospective Investigation of Variables as Outcomes for Treatment (PIVOT) was designed with three aims: (1) to measure the toxicities of hydroxyurea treatment on laboratory parameters, (2) to assess the effects of hydroxyurea treatment on sickle-related clinical and laboratory parameters, and (3) to identify study endpoints suitable for a future definitive phase III trial of hydroxyurea treatment of HbSC disease. METHODS PIVOT is a randomised, placebo-controlled, double blind clinical trial of hydroxyurea. Approximately 120 children and 120 adults ages 5-50 years with HbSC disease will be enrolled, screened for 2 months, and then randomised 1:1 to once-daily oral hydroxyurea or placebo. Study treatment will be prescribed initially at 20 ± 5 mg/kg/day with an opportunity to escalate the dose twice over the first 6 months. After 12 months of blinded study treatment, all participants will be offered open-label hydroxyurea for up to 4 years. Safety outcomes include treatment-related cytopenias, whole blood viscosity, and adverse events. Efficacy outcomes include a variety of laboratory and clinical parameters over the first 12 months of randomised treatment, including changes in haemoglobin and fetal haemoglobin, intracranial arterial velocities measured by transcranial Doppler ultrasound, cerebral oxygenation using near infrared spectrometry, spleen volume and kidney size by ultrasound, proteinuria, and retinal imaging. Exploratory outcomes include functional erythrocyte analyses with ektacytometry for red blood cell deformability and point-of-sickling, patient-reported outcomes using the PROMIS questionnaire, and 6-min walk test. DISCUSSION For children and adults with HbSC disease, PIVOT will determine the safety of hydroxyurea and identify measurable changes in laboratory and clinical parameters, suitable for future prospective testing in a definitive multi-centre phase III clinical trial. TRIAL REGISTRATION PACTR, PACTR202108893981080. Registered 24 August 2021, https://pactr.samrc.ac.za.
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Affiliation(s)
- Luke R Smart
- Division of Hematology, Cincinnati Children's Hospital Medical Center, Cincinnati, USA.
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, USA.
- Global Health Center, Cincinnati Children's Hospital Medical Center, Cincinnati, USA.
| | - Catherine I Segbefia
- Department of Child Health, University of Ghana Medical School, Accra, Ghana
- Department of Child Health, Korle Bu Teaching Hospital, Accra, Ghana
| | - Teresa S Latham
- Division of Hematology, Cincinnati Children's Hospital Medical Center, Cincinnati, USA
| | - Susan E Stuber
- Division of Hematology, Cincinnati Children's Hospital Medical Center, Cincinnati, USA
- Global Health Center, Cincinnati Children's Hospital Medical Center, Cincinnati, USA
| | - Kwesi N Amissah-Arthur
- Ophthalmology Unit, Department of Surgery, University of Ghana Medical School, Accra, Ghana
- Ophthalmology Unit, Department of Surgery, Korle Bu Teaching Hospital, Accra, Ghana
| | | | - Adam C Lane
- Division of Hematology, Cincinnati Children's Hospital Medical Center, Cincinnati, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, USA
| | - Yvonne A Dei-Adomakoh
- Department of Haematology, University of Ghana Medical School, Accra, Ghana
- Department of Haematology, Korle Bu Teaching Hospital, Accra, Ghana
- Ghana Institute of Clinical Genetics, Korle Bu, Accra, Ghana
| | - Russell E Ware
- Division of Hematology, Cincinnati Children's Hospital Medical Center, Cincinnati, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, USA
- Global Health Center, Cincinnati Children's Hospital Medical Center, Cincinnati, USA
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10
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Piel FB, Rees DC, DeBaun MR, Nnodu O, Ranque B, Thompson AA, Ware RE, Abboud MR, Abraham A, Ambrose EE, Andemariam B, Colah R, Colombatti R, Conran N, Costa FF, Cronin RM, de Montalembert M, Elion J, Esrick E, Greenway AL, Idris IM, Issom DZ, Jain D, Jordan LC, Kaplan ZS, King AA, Lloyd-Puryear M, Oppong SA, Sharma A, Sung L, Tshilolo L, Wilkie DJ, Ohene-Frempong K. Defining global strategies to improve outcomes in sickle cell disease: a Lancet Haematology Commission. Lancet Haematol 2023; 10:e633-e686. [PMID: 37451304 DOI: 10.1016/s2352-3026(23)00096-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/31/2023] [Accepted: 04/12/2023] [Indexed: 07/18/2023]
Affiliation(s)
- Frédéric B Piel
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK.
| | - David C Rees
- Department of Paediatric Haematology, King's College London, King's College Hospital, London, UK
| | - Michael R DeBaun
- Department of Pediatrics, Vanderbilt-Meharry Center of Excellence for Sickle Cell Disease, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Obiageli Nnodu
- Department of Haematology and Blood Transfusion, College of Health Sciences and Centre of Excellence for Sickle Cell Disease Research and Training, University of Abuja, Abuja, Nigeria
| | - Brigitte Ranque
- Department of Internal Medicine, Georges Pompidou European Hospital, Assistance Publique-Hopitaux de Paris Centre, University of Paris Cité, Paris, France
| | - Alexis A Thompson
- Division of Hematology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Russell E Ware
- Division of Hematology and Global Health Center, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Miguel R Abboud
- Department of Pediatrics and Adolescent Medicine, and Sickle Cell Program, American University of Beirut, Beirut, Lebanon
| | - Allistair Abraham
- Division of Blood and Marrow Transplantation, Children's National Hospital, Washington, DC, USA
| | - Emmanuela E Ambrose
- Department of Paediatrics and Child Health, Bugando Medical Centre, Mwanza, Tanzania
| | - Biree Andemariam
- New England Sickle Cell Institute, University of Connecticut Health, Connecticut, USA
| | - Roshan Colah
- Department of Haematogenetics, Indian Council of Medical Research National Institute of Immunohaematology, Mumbai, India
| | - Raffaella Colombatti
- Pediatric Oncology Hematology Unit, Department of Women's and Children's Health, University of Padua, Padua, Italy
| | - Nicola Conran
- Department of Clinical Medicine, School of Medical Sciences, Center of Hematology and Hemotherapy (Hemocentro), University of Campinas-UNICAMP, Campinas, Brazil
| | - Fernando F Costa
- Department of Clinical Medicine, School of Medical Sciences, Center of Hematology and Hemotherapy (Hemocentro), University of Campinas-UNICAMP, Campinas, Brazil
| | - Robert M Cronin
- Department of Internal Medicine, The Ohio State University, Columbus, OH, USA
| | - Mariane de Montalembert
- Department of Pediatrics, Necker-Enfants Malades Hospital, Assistance Publique-Hopitaux de Paris Centre, Paris, France
| | - Jacques Elion
- Paris Cité University and University of the Antilles, Inserm, BIGR, Paris, France
| | - Erica Esrick
- Dana-Farber/Boston Children's Cancer and Blood Disorders Center, Harvard Medical School, Boston, MA, USA
| | - Anthea L Greenway
- Department Clinical Haematology, Royal Children's Hospital, Parkville and Department Haematology, Monash Health, Clayton, VIC, Australia
| | - Ibrahim M Idris
- Department of Hematology, Aminu Kano Teaching Hospital/Bayero University Kano, Kano, Nigeria
| | - David-Zacharie Issom
- Department of Business Information Systems, School of Management, HES-SO University of Applied Sciences and Arts of Western Switzerland, Geneva, Switzerland
| | - Dipty Jain
- Department of Paediatrics, Government Medical College, Nagpur, India
| | - Lori C Jordan
- Department of Pediatrics, Division of Pediatric Neurology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Zane S Kaplan
- Department of Clinical Haematology, Monash Health and Monash University, Melbourne, VIC, Australia
| | - Allison A King
- Departments of Pediatrics and Internal Medicine, Divisions of Pediatric Hematology and Oncology and Hematology, Washington University School of Medicine, St Louis, MO, USA
| | - Michele Lloyd-Puryear
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
| | - Samuel A Oppong
- Department of Obstetrics and Gynecology, University of Ghana Medical School, Accra, Ghana
| | - Akshay Sharma
- Department of Bone Marrow Transplantation and Cellular Therapy, St Jude Children's Research Hospital, Memphis, TN, USA
| | - Lillian Sung
- Division of Haematology/Oncology, The Hospital for Sick Children, Toronto, ON, Canada
| | - Leon Tshilolo
- Institute of Biomedical Research/CEFA Monkole Hospital Centre and Official University of Mbuji-Mayi, Mbuji-Mayi, Democratic Republic of the Congo
| | - Diana J Wilkie
- Department of Biobehavioral Nursing Science, College of Nursing, University of Florida, Gainesville, FL, USA
| | - Kwaku Ohene-Frempong
- Division of Hematology, Children's Hospital of Philadelphia, Pennsylvania, USA; Sickle Cell Foundation of Ghana, Kumasi, Ghana
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11
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Dei-Adomakoh Y, Effah K, Tekpor E, Crabbe S, Amuah JE, Wormenor CM, Tay G, Asare EV, Kemawor S, Danyo S, Morkli EAC, Tibu F, Essel NO, Akakpo PK. Cervical precancer screening with HPV DNA testing and mobile colposcopy in women with sickle cell disease in Accra, Ghana. Ecancermedicalscience 2023; 17:1571. [PMID: 37533951 PMCID: PMC10393310 DOI: 10.3332/ecancer.2023.1571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Indexed: 08/04/2023] Open
Abstract
Background Worldwide, about 20-25 million people are affected by sickle cell disease (SCD), with 60% of patients living in sub-Saharan Africa. Despite recent therapeutic advancements resulting in improved life expectancy among SCD patients, the prevalence of high-risk human papillomavirus (hr-HPV) and cervical lesions have not been studied in women with SCD. We determined the prevalence of hr-HPV and cervical lesions among women with SCD and recommended strategies for reducing cervical cancer incidence in this cohort. Methods Through the mPharma 10,000 Women Initiative, women with SCD attending routine visits at the Ghana Institute of Clinical Genetics SCD clinic were screened by trained nurses. Screening was performed via concurrent MA-6000 hr-HPV DNA testing and enhanced visual assessment (EVA) mobile colposcopy from mobileODT. Results Among 168 participants screened (mean age, 43.0 years), the overall prevalence rates of hr-HPV infection and cervical lesions were 28.6% (95% CI, 21.7-35.4) and 3.6% (95% CI, 0.8-6.4), respectively. The hr-HPV prevalence rates stratified by haemoglobin genotype were 29.4% (95% CI, 19.7-39.1) and 28.6% (95% CI, 18.5-38.7) for genotypes SS and SC, respectively. None of the five women with the SF genotype tested hr-HPV positive, and the only patient with Sbthal genotype tested hr-HPV positive. Two women were EVA 'positive' but hr-HPV negative, whereas four were EVA positive and hr-HPV positive. Exploratory analysis revealed no significant associations between hr-HPV positivity and age, education level, marital status or parity. Conclusion In the absence of a comprehensive national cervical screening programme aimed at including women with SCD as a special population, cervical cancer may increase in frequency among SCD patients. Thus, there is a need to build capacity and expand the scope of screening services for women with SCD.
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Affiliation(s)
- Yvonne Dei-Adomakoh
- Korle-Bu Teaching Hospital, Ghana Institute of Clinical Genetics, Accra, Ghana
- Department of Haematology, University of Ghana Medical School, Accra, Ghana
- https://orcid.org/0000-0002-2017-2569
| | - Kofi Effah
- Catholic Hospital, Battor, Ghana
- https://orcid.org/0000-0003-1216-2296
| | | | - Selina Crabbe
- Korle-Bu Teaching Hospital, Ghana Institute of Clinical Genetics, Accra, Ghana
| | - Joseph Emmanuel Amuah
- Catholic Hospital, Battor, Ghana
- Faculty of Medicine, School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | | | | | - Eugenia Vicky Asare
- Korle-Bu Teaching Hospital, Ghana Institute of Clinical Genetics, Accra, Ghana
- Department of Haematology, Korle-Bu Teaching Hospital, Accra, Ghana
| | | | | | | | | | - Nana Owusu Essel
- Department of Emergency Medicine, Faculty of Medicine & Dentistry, College of Health Sciences, University of Alberta, Edmonton, AB T6G 2T4, Canada
- https://orcid.org/0000-0001-5494-5411
| | - Patrick Kafui Akakpo
- Department of Pathology, Clinical Teaching Center, School of Medical Sciences, University of Cape Coast, Cape Coast, Ghana
- https://orcid.org/0000-0003-0356-0663
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12
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Hankins JS, Potter MB, Fernandez ME, Melvin C, DiMartino L, Jacobs SR, Bosworth HB, King AA, Simon J, Glassberg JA, Kutlar A, Gordeuk VR, Shah N, Baumann AA, Klesges LM. Evaluating the implementation of a multi-level mHealth study to improve hydroxyurea utilization in sickle cell disease. FRONTIERS IN HEALTH SERVICES 2023; 2:1024541. [PMID: 36925803 PMCID: PMC10012741 DOI: 10.3389/frhs.2022.1024541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 12/09/2022] [Indexed: 01/22/2023]
Abstract
Background Sickle Cell Disease (SCD) is a progressive genetic disease that causes organ damage and reduces longevity. Hydroxyurea is an underutilized evidence-based medication that reduces complications and improves survival in SCD. In a multi-site clinical trial, part of the NIH-funded Sickle Cell Disease Implementation Consortium (SCDIC), we evaluate the implementation of a multi-level and multi-component mobile health (mHealth) patient and provider intervention to target the determinants and context of low hydroxyurea use. Given the complexity of the intervention and contextual variability in its implementation, we combined different behavioral and implementation theories, models, and frameworks to facilitate the evaluation of the intervention implementation. In this report, we describe engagement with stakeholders, planning of the implementation process, and final analytical plan to evaluate the implementation outcomes. Methods During 19 meetings, a 16-member multidisciplinary SCDIC implementation team created, conceived, and implemented a project that utilized Intervention Mapping to guide designing an intervention and its evaluation plan. The process included five steps: (1) needs assessment of low hydroxyurea utilization, (2) conceptual framework development, (3) intervention design process, (4) selection of models and frameworks, and (5) designing evaluation of the intervention implementation. Results Behavioral theories guided the needs assessment and the design of the multi-level mHealth intervention. In designing the evaluation approach, we combined two implementation frameworks to best account for the contextual complexity at the organizational, provider, and patient levels: (1) the Consolidated Framework for Implementation Research (CFIR) that details barriers and facilitators to implementing the mHealth intervention at multiple levels (users, organization, intervention characteristics, broader community), and (2) the Technology Acceptance Model (TAM), a conceptual model specific for explaining the intent to use new information technology (including mHealth). The Reach Effectiveness Adoption Implementation and Maintenance (RE-AIM) framework was used to measure the outcomes. Discussion Our research project can serve as a case study of a potential approach to combining different models/frameworks to help organize and plan the evaluation of interventions to increase medication adherence. The description of our process may serve as a blueprint for future studies developing and testing new strategies to foster evidence-based treatments for individuals living with SCD.
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Affiliation(s)
- J. S Hankins
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - M. B Potter
- Department of Family and Community Medicine, University of California San Francisco School of Medicine, San Francisco, CA, United States
- Clinical, Family, and Community Medicine, University of California San Francisco, CA, United States
| | - M. E Fernandez
- Health Promotion and Behavioral Sciences, University of Texas Health Science Center, School of Public Health at Houston, Houston, TX, United States
| | - C Melvin
- The Medical University of South Carolina, Charleston, SC, United States
| | - L DiMartino
- RTI International, Research triangle park, NC, United States
| | - S. R Jacobs
- RTI International, Research triangle park, NC, United States
| | - H. B Bosworth
- Department of Population Health Studies, Duke University, Durham, NC, United States
- Center of Innovation to Accelerate Discovery and Practice Transformation (ADAPT), Durham Veterans Affairs Medical Center, Durham, NC, United States
| | - A. A King
- Department of Pediatrics, Washington University, Saint louis, MO, United States
| | - J Simon
- Department of Emergency Medicine, Ichan School of Medicine at Mount Sinai, New York, NY, United States
| | - J. A Glassberg
- Department of Emergency Medicine, Ichan School of Medicine at Mount Sinai, New York, NY, United States
| | - A Kutlar
- Augusta University, Augusta, GA, United States
| | - V. R Gordeuk
- Department of Medicine, the University of Illinois at Chicago, Chicago, IL, United States
| | - N Shah
- Department of Pediatric Hematology and Oncology, Duke University, Durham, NC, United States
| | - A. A Baumann
- Division of Public Health Sciences, Department of Surgery, Washington University, Saint louis, MO, United States
| | - L. M Klesges
- Division of Public Health Sciences, Department of Surgery, Washington University, Saint louis, MO, United States
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13
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Bedrick BS, Kohn TP, Pecker LH, Christianson MS. Fertility preservation for pediatric patients with hemoglobinopathies: Multidisciplinary counseling needed to optimize outcomes. Front Endocrinol (Lausanne) 2022; 13:985525. [PMID: 36353243 PMCID: PMC9638952 DOI: 10.3389/fendo.2022.985525] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 09/30/2022] [Indexed: 01/19/2023] Open
Abstract
Hemoglobinopathies are autosomal recessive disorders that occur when genetic mutations negatively impact the function of hemoglobin. Common hemoglobinopathies that are clinically significant include sickle cell disease, alpha thalassemia, and beta thalassemia. Advancements in disease-modifying and curative treatments for the common hemoglobinopathies over the past thirty years have led to improvements in patient quality of life and longevity for those who are affected. However, the diseases, their treatments and cures pose infertility risks, making fertility preservation counseling and treatment an important part of the contemporary comprehensive patient care. Sickle cell disease negatively impacts both male and female infertility, primarily by testicular failure and decreased ovarian reserve, respectively. Fertility in both males and females with beta thalassemia major are negatively impacted by iron deposition due to chronic blood transfusions. Hematopoietic stem cell transplant (HSCT) is currently the only curative treatment for SCD and transfusion dependent beta thalassemia. Many of the conditioning regimens for HSCT contain chemotherapeutic agents with known gonadotoxicity and whole-body radiation. Although most clinical studies on toxicity and impact of HSCT on long-term health do not evaluate fertility, gonadal failure is common. Male fertility preservation modalities that exist prior to gonadotoxic treatment include sperm banking for pubertal males and testicular cryopreservation for pre-pubertal boys. For female patients, fertility preservation options include oocyte cryopreservation and ovarian tissue cryopreservation. Oocyte cryopreservation requires controlled ovarian hyperstimulation (COH) with ten to fourteen days of intensive monitoring and medication administration. This is feasible once the patient has undergone menarche. Follicular growth is monitored via transvaginal or transabdominal ultrasound, and hormone levels are monitored through frequent blood work. Oocytes are then harvested via a minimally invasive approach under anesthesia. Complications of COH are more common in patients with hemoglobinopathies. Ovarian hyperstimulation syndrome creates a greater risk to patients with underlying vascular, pulmonary, and renal injury, as they may be less able to tolerate fluids shifts. Thus, it is critical to monitor patients undergoing COH closely with close collaboration between the hematology team and the reproductive endocrinology team. Counseling patients and families about future fertility must take into consideration the patient's disease, treatment history, and planned treatment, acknowledging current knowledge gaps.
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Affiliation(s)
- Bronwyn S. Bedrick
- Department of Gynecology and Obstetrics, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Taylor P. Kohn
- Department of Urology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Lydia H. Pecker
- Department of Medicine, Division of Adult Hematology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Mindy S. Christianson
- Department of Gynecology and Obstetrics, Division of Reproductive Endocrinology and Infertility, Johns Hopkins University School of Medicine, Baltimore, MD, United States
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14
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Treadwell MJ, Du L, Bhasin N, Marsh AM, Wun T, Bender MA, Wong TE, Crook N, Chung JH, Norman S, Camilo N, Cavazos J, Nugent D. Barriers to hydroxyurea use from the perspectives of providers, individuals with sickle cell disease, and families: Report from a U.S. regional collaborative. Front Genet 2022; 13:921432. [PMID: 36092883 PMCID: PMC9461276 DOI: 10.3389/fgene.2022.921432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 07/07/2022] [Indexed: 11/17/2022] Open
Abstract
Sickle cell disease (SCD) is an inherited blood disorder that affects about 100,000 people in the U.S., primarily Blacks/African-Americans. A multitude of complications negatively impacts quality of life. Hydroxyurea has been FDA approved since 1998 as a disease-modifying therapy for SCD, but is underutilized. Negative and uninformed perceptions of hydroxyurea and barriers to its use hinder adherence and promotion of the medication. As the largest real-world study to date that assessed hydroxyurea use for children and adults with SCD, we gathered and analyzed perspectives of providers, individuals with SCD, and families. Participants provided information about socio-demographics, hospital and emergency admissions for pain, number of severe pain episodes interfering with daily activities, medication adherence, and barriers to hydroxyurea. Providers reported on indications for hydroxyurea, reasons not prescribed, and current laboratory values. We found that hydroxyurea use was reported in over half of eligible patients from this large geographic region in the U.S., representing a range of sickle cell specialty clinical settings and practices. Provider and patient/caregiver reports about hydroxyurea use were consistent with one another; adults 26 years and older were least likely to be on hydroxyurea; and the likelihood of being on hydroxyurea decreased with one or more barriers. Using the intentional and unintentional medication nonadherence framework, we found that, even for patients on hydroxyurea, challenges to taking the medicine at the right time and forgetting were crucial unintentional barriers to adherence. Intentional barriers such as worry about side effects and “tried and it did not work” were important barriers for young adults and adults. For providers, diagnoses other than HgbSS or HgbS-β0 thalassemia were associated with lower odds of prescribing, consistent with evidence-based guidelines. Our results support strengthening provider understanding and confidence in implementing existing SCD guidelines, and the importance of shared decision making. Our findings can assist providers in understanding choices and decisions of families; guide individualized clinical discussions regarding hydroxyurea therapy; and help with developing tailored interventions to address barriers. Addressing barriers to hydroxyurea use can inform strategies to minimize similar barriers in the use of emerging and combination therapies for SCD.
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Affiliation(s)
- Marsha J. Treadwell
- Division of Hematology, Department of Pediatrics, University of California, San Francisco, San Francisco, CA, United States
- UCSF Benioff Children’s Hospital Oakland, Oakland, CA, United States
- *Correspondence: Marsha J. Treadwell,
| | - Lisa Du
- UCSF Benioff Children’s Hospital Oakland, Oakland, CA, United States
| | - Neha Bhasin
- Division of Hematology, Department of Pediatrics, University of California, San Francisco, San Francisco, CA, United States
- UCSF Benioff Children’s Hospital Oakland, Oakland, CA, United States
| | - Anne M. Marsh
- Division of Hematology/Oncology, Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Theodore Wun
- Division of Hematology and Oncology, Department of Internal Medicine, University of California, Davis, Davis, CA, United States
| | - M. A. Bender
- Odessa Brown Children’s Clinic, Seattle Children’s Hospital, Seattle, WA, United States
| | - Trisha E. Wong
- Division of Pediatric Hematology and Oncology and Department of Pathology, Oregon Health and Sciences University, Portland, OR, United States
| | - Nicole Crook
- Center for Inherited Blood Disorders, Orange, CA, United States
| | - Jong H. Chung
- Hematology-Oncology, Department of Pediatrics, University of California, Davis, Davis, CA, United States
| | - Shannon Norman
- Alaska Bleeding Disorders Clinic, Anchorage, AK, United States
| | - Nicolas Camilo
- St. Luke’s Children’s Cancer Institute, Boise, ID, United States
| | - Judith Cavazos
- UCSF Benioff Children’s Hospital Oakland, Oakland, CA, United States
| | - Diane Nugent
- Center for Inherited Blood Disorders, Orange, CA, United States
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15
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Phan V, Park JA, Dulman R, Lewis A, Briere N, Notarangelo B, Yang E. Ten-year Longitudinal Analysis of Hydroxyurea Implementation in a Pediatric Sickle Cell Program. Eur J Haematol 2022; 109:465-473. [PMID: 35811388 DOI: 10.1111/ejh.13827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 07/05/2022] [Accepted: 07/07/2022] [Indexed: 11/27/2022]
Abstract
Hydroxyurea (HU) has proven benefit in sickle cell anemia (SCA), but HU is still underutilized. The Pediatric Sickle Cell Program of Northern Virginia prescribes HU regardless of symptoms to all SCA patients age ≥ 9 months and prospectively tracks outcomes. HU is dosed to maximum tolerated dosing (MTD), targeting 30% Hgb F. Longitudinal data from 2009-2019 encompassing 1222 HU-eligible and 950 HU-exposure patient-years were analyzed in 2-year intervals for hemoglobin (Hgb), fetal hemoglobin (Hgb F), hospitalizations, transfusions, and treat-and-release ED visits. Comparing HU-eligible patients in the interval prior to HU implementation (2009-2011) to the last interval analyzed after HU implementation (2017-2019), HU usage increased from 33% to 93%, average Hgb increased from 8.3±0.98 to 9.8±1.3 g/dL (p<0.0001), average Hgb F rose from 13±8.7% to 26±9.9% (p<0.0001), hospitalizations decreased from 0.71 (95% CI 0.54-0.91) to 0.2 (95% CI 0.13-0.28) admissions/person-year, sporadic transfusions decreased from 0.4 (95% CI 0.27-0.55) to 0.05 (95% CI 0.02-0.12) transfusions/person-year. Treat-and-release ED visit rates remained unchanged, varying between 0.49 (95% CI 0.36-0.64) and 0.64 (95% CI 0.48-0.83) visits/person-year. By the last interval, 72% of patients had Hgb ≥ 9g/dL, 42% had Hgb F ≥ 30%, 79% experienced no hospitalizations, and 94% received no transfusions. Uniform HU prescription for SCA patients with close monitoring to achieve high Hgb F resulted in significant improvements in laboratory and clinical outcomes within 2 years, which continued to improve over the next 6 years. Rigorous HU implementation in a pediatric sickle cell population is feasible, effective, and sustainable. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Vivian Phan
- Pediatric Specialists of Virginia, Fairfax, VA
| | - Ju Ae Park
- Inova Fairfax Hospital, Falls Church, VA
| | | | | | | | | | - Elizabeth Yang
- Pediatric Specialists of Virginia, Fairfax, VA.,Department of Pediatrics, George Washington University School of Medicine, Washington, DC
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16
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Manejo clínico de las complicaciones agudas de la anemia falciforme: 11 años de experiencia en un hospital terciario. An Pediatr (Barc) 2022. [DOI: 10.1016/j.anpedi.2021.08.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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17
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Reparaz P, Serrano I, Adan-Pedroso R, Astigarraga I, de Pedro Olabarri J, Echebarria-Barona A, Garcia-Ariza M, Lopez-Almaraz R, Del Orbe-Barreto RA, Vara-Pampliega M, Gonzalez-Urdiales P. Clinical management of the acute complications of sickle cell anemia: 11 years of experience in a tertiary hospital. An Pediatr (Barc) 2022; 97:4-11. [PMID: 35729060 DOI: 10.1016/j.anpede.2022.06.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 08/25/2021] [Indexed: 10/18/2022] Open
Abstract
INTRODUCTION Sickle cell disease is an emerging anemia in Europe leading to high morbidity with severe acute complications requiring hospital admission and chronic consequences. The management of these patients is complex and needs interdisciplinary care. The objective is to analyze clinical characteristics and management of patients with sickle cell disease admitted for acute complications. METHODS Retrospective descriptive study of admissions for acute complications of patients with sickle cell disease under 16 years of age in a tertiary hospital between 2010 and 2020. Clinical, laboratory and radiological data were reviewed. RESULTS We included 71 admissions corresponding to 25 patients, 40% diagnosed by neonatal screening. Admissions increased during this period. The most frequent diagnoses were vaso-occlusive crisis (35.2%), febrile syndrome (33.8%) and acute chest syndrome (32.3%). Nine patients required critical care at PICU. Positive microbiological results were confirmed in 20 cases, bacterial in 60%. Antibiotic therapy was administered in 86% of cases and the vaccination schedule of asplenia was adequately fulfilled by 89%. Opioid analgesia was required in 28%. Chronic therapy with hydroxyurea prior to admission was used in 41%. CONCLUSIONS Acute complications requiring hospital admission are frequent in patients with sickle cell disease, being vaso-occlusive crisis and febrile syndrome the most common. These patients need a high use of antibiotics and opioid analgesia. Prior diagnosis facilitates the recognition of life-threatening complications such as acute chest syndrome and splenic sequestration. Despite the prophylactic and therapeutic measures currently provided to these patients, many patients suffer acute complications that require hospital management.
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Affiliation(s)
- Patricia Reparaz
- Servicio de Pediatría, Hospital Universitario Cruces, Osakidetza, Barakaldo, Bizkaia, Spain
| | - Idoya Serrano
- Servicio de Pediatría, Hospital Universitario Cruces, Osakidetza, Barakaldo, Bizkaia, Spain
| | - Rosa Adan-Pedroso
- Servicio de Pediatría, Hospital Universitario Cruces, Osakidetza, Barakaldo, Bizkaia, Spain; Biocruces Bizkaia Health Research Institute, Barakaldo, Bizkaia, Spain
| | - Itziar Astigarraga
- Servicio de Pediatría, Hospital Universitario Cruces, Osakidetza, Barakaldo, Bizkaia, Spain; Biocruces Bizkaia Health Research Institute, Barakaldo, Bizkaia, Spain; Departamento de Pediatría, Universidad del País Vasco UPV/EHU, Spain
| | - Jimena de Pedro Olabarri
- Servicio de Pediatría, Hospital Universitario Cruces, Osakidetza, Barakaldo, Bizkaia, Spain; Biocruces Bizkaia Health Research Institute, Barakaldo, Bizkaia, Spain
| | - Aizpea Echebarria-Barona
- Servicio de Pediatría, Hospital Universitario Cruces, Osakidetza, Barakaldo, Bizkaia, Spain; Biocruces Bizkaia Health Research Institute, Barakaldo, Bizkaia, Spain
| | - Miguel Garcia-Ariza
- Servicio de Pediatría, Hospital Universitario Cruces, Osakidetza, Barakaldo, Bizkaia, Spain; Biocruces Bizkaia Health Research Institute, Barakaldo, Bizkaia, Spain
| | - Ricardo Lopez-Almaraz
- Servicio de Pediatría, Hospital Universitario Cruces, Osakidetza, Barakaldo, Bizkaia, Spain; Biocruces Bizkaia Health Research Institute, Barakaldo, Bizkaia, Spain
| | - Rafael A Del Orbe-Barreto
- Servicio de Hematología y Hemoterapia, Hospital Universitario Cruces, Osakidetza, Barakaldo, Bizkaia, Spain
| | - Miriam Vara-Pampliega
- Servicio de Hematología y Hemoterapia, Hospital Universitario Cruces, Osakidetza, Barakaldo, Bizkaia, Spain
| | - Paula Gonzalez-Urdiales
- Servicio de Pediatría, Hospital Universitario Cruces, Osakidetza, Barakaldo, Bizkaia, Spain; Biocruces Bizkaia Health Research Institute, Barakaldo, Bizkaia, Spain.
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18
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Creary SE, Beeman C, Stanek J, King K, McGann PT, O’Brien SH, Liem RI, Holl J, Badawy SM. Impact of hydroxyurea dose and adherence on hematologic outcomes for children with sickle cell anemia. Pediatr Blood Cancer 2022; 69:e29607. [PMID: 35373884 PMCID: PMC9038671 DOI: 10.1002/pbc.29607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 01/28/2022] [Accepted: 02/01/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Hydroxyurea is the primary treatment for sickle cell anemia (SCA), yet real-world implementation in high-income settings is suboptimal. Variation in prescribed hydroxyurea dose and patient adherence in these settings can both affect actual exposure to hydroxyurea. Quantifying the contributions of hydroxyurea dose and medication adherence to the relationship between hydroxyurea exposure and hematologic parameters could inform strategies to optimize exposure and improve outcomes. PROCEDURE We evaluated the relationship between hydroxyurea exposure, defined by average prescribed dose and adherence, and hematologic parameters using data from children with SCA who were enrolled in two prospective hydroxyurea adherence studies. Hydroxyurea adherence was assessed by video directly observed therapy or electronic pill bottle and medication administration record. Average prescribed dose was abstracted from prescriptions in patients' electronic medical record. Participants with a hydroxyurea exposure >20 mg/kg/day and ≤20 mg/kg/day were included in the higher and lower exposure groups, respectively. RESULTS Forty-five participants were included in the analysis (56% male; median age 12 years [range 2-19]; 98% Black). Higher exposed participants (n = 23) were prescribed a higher dose (27.2 vs. 24.4 mg/kg/day, p = .002) and had better adherence (0.92 vs. 0.71, p ≤ .001) compared to lower exposed participants (n = 22). Higher exposure was associated with higher fetal hemoglobin (p = .04) and mean corpuscular volume (p = .02). CONCLUSIONS Higher hydroxyurea exposure is associated with improved hematologic parameters in the high-income setting and is affected by both prescribed dose and adherence. Future studies are needed to optimize both adherence and hydroxyurea prescribing and confirm that increasing exposure improves clinical outcomes in this setting.
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Affiliation(s)
- Susan E. Creary
- Center for Child Health Equity and Outcomes, Research Institute Nationwide Children’s Hospital, Columbus, OH,Division of Pediatric Hematology/Oncology/BMT, Nationwide Children’s Hospital & The Ohio State University, Columbus, OH
| | - Chase Beeman
- Center for Child Health Equity and Outcomes, Research Institute Nationwide Children’s Hospital, Columbus, OH
| | - Joseph Stanek
- Division of Pediatric Hematology/Oncology/BMT, Nationwide Children’s Hospital & The Ohio State University, Columbus, OH
| | - Kathryn King
- Division of Hematology, Oncology and Stem Cell Transplantation, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL
| | - Patrick T. McGann
- Department of Pediatrics, The Warren Alpert Medical School of Brown University, Hasbro Children’s Hospital and Rhode Island Hospital, Providence, RI
| | - Sarah H. O’Brien
- Center for Child Health Equity and Outcomes, Research Institute Nationwide Children’s Hospital, Columbus, OH,Division of Pediatric Hematology/Oncology/BMT, Nationwide Children’s Hospital & The Ohio State University, Columbus, OH
| | - Robert I. Liem
- Division of Hematology, Oncology and Stem Cell Transplantation, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL
| | - Jane Holl
- Department of Neurology and Center for Healthcare Delivery Science and Innovation, University of Chicago, Chicago, IL
| | - Sherif M. Badawy
- Division of Hematology, Oncology and Stem Cell Transplantation, Ann & Robert H. Lurie Children’s Hospital of Chicago, Chicago, IL,Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, IL
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19
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Binding A. Bringing Sickle Cell Disease Care Closer to Home: Feasibility and Efficacy of a Quality Improvement Initiative at a Community Hospital. Hemoglobin 2022; 46:91-94. [PMID: 35549807 DOI: 10.1080/03630269.2022.2073888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Comprehensive care for patients with sickle cell disease has been shown to improve morbidity. However, few studies have focused on community hospitals where the burden of disease is highest. From 2017 to 2019, a series of quality improvement interventions was implemented in Brampton, Toronto, ON, Canada, directed toward pediatric and adult sickle cell disease populations. This included a new adult clinic and education directed at patients and healthcare providers. There were 206 visits from 88 unique patients at the clinic and hydroxyurea (HU) uptake increased from 41.0 to 60.0% over that time (p < 0.001). The annual admission rate by adult patients before and after intervention was 90.0 and 75.0% respectively (p = 0.010). The length of stay of pediatric patients decreased from 3.5 to 2.9 days (p = 0.039). These interventions resulted in significant improvements in acute care utilization and HU use by sickle cell disease patients locally, but larger studies are required to confirm these findings.
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Affiliation(s)
- Andrew Binding
- Department of Medicine, William Osler Health System, Brampton, ON, Canada.,University Health Network, University of Toronto, Toronto, ON, Canada
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20
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Cyrus C. The Role of miRNAs as Therapeutic Tools in Sickle Cell Disease. MEDICINA (KAUNAS, LITHUANIA) 2021; 57:1106. [PMID: 34684143 PMCID: PMC8538468 DOI: 10.3390/medicina57101106] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/01/2021] [Accepted: 10/12/2021] [Indexed: 01/05/2023]
Abstract
Background and Objectives: Sickle cell disorder (SCD) is a paradigmatic example of a complex monogenic disorder. SCD is characterized by the production of abnormal hemoglobin, primarily in the deoxygenated state, which makes erythrocytes susceptible to intracellular hemoglobin polymerization. Functional studies have affirmed that the dysregulation of miRNAs enhances clinical severity or has an ameliorating effect in SCD. miRNAs can be effectively regulated to reduce the pace of cell cycle progression, to reduce iron levels, to influence hemolysis and oxidative stress, and most importantly, to increase γ-globin gene expression and enhance the effectiveness of hydroxyurea. Results: This review highlights the roles played by some key miRNAs in hemoglobinopathies, especially in hematopoiesis, erythroid differentiation, and severity of anemia, which make miRNAs attractive molecular tools for innovative therapeutic approaches. Conclusions: In this era of targeted medicine, miRNAs mimics and antagomirs may be promising inducers of HbF synthesis which could ameliorate the clinical severity of SCD.
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Affiliation(s)
- Cyril Cyrus
- Department of Biochemistry, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam 31141, Saudi Arabia
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21
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Dexter D, McGann PT. The promise and role of point of care testing to reduce the global burden of sickle cell disease through early diagnosis and linkage to care. Br J Haematol 2021; 196:63-69. [PMID: 34340260 DOI: 10.1111/bjh.17678] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 06/12/2021] [Indexed: 11/28/2022]
Abstract
Sickle cell disease (SCD) is a devastating and under-recognised global child health issue affecting over 300,000 infants annually, with the highest prevalence in India and sub-Saharan Africa. Most affected infants born in low- and middle-income countries (LMIC) lack access to SCD testing and die from complications in the first years of life without a formal diagnosis. The majority of deaths are preventable with early diagnosis and provision of inexpensive interventions. Despite global recognition of the urgent need, expansion of SCD newborn screening (NBS) programmes beyond the pilot stage has been obstructed by a dependence on an expensive and logistically challenging centralised laboratory testing model. Recently, several point-of-care tests (POCT) for SCD have been developed with promising field validation studies. Here, we summarise the state of POCT for SCD, review barriers and unanswered questions, and discuss optimal strategies for utilising POCT to address the growing global burden of SCD. There is an urgent need to prospectively evaluate the ability of POCT to reduce the morbidity and high early mortality of SCD. To impact a sustainable reduction to this end, it is essential to link a diagnosis with comprehensive SCD care, including wide and affordable access to affordable hydroxycarbamide therapy.
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Affiliation(s)
- Daniel Dexter
- Department of Paediatrics, St Mary's Hospital, Imperial College Healthcare Trust, London, UK
| | - Patrick T McGann
- Division of Hematology and Global Health Center, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
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22
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Heitzer AM, Longoria J, Okhomina V, Wang WC, Raches D, Potter B, Jacola LM, Porter J, Schreiber JE, King AA, Kang G, Hankins JS. Hydroxyurea treatment and neurocognitive functioning in sickle cell disease from school age to young adulthood. Br J Haematol 2021; 195:256-266. [PMID: 34272726 DOI: 10.1111/bjh.17687] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/21/2021] [Accepted: 06/07/2021] [Indexed: 12/18/2022]
Abstract
Neurocognitive impairment is common in sickle cell disease (SCD) and is associated with significant functional limitations. In a cross-sectional analysis, we examined the association between hydroxyurea (HU) treatment and neurocognitive functioning from school-age to young adulthood in individuals with SCD. A total of 215 patients with HbSS/HbSβ0 -thalassaemia (71% HU treated) and 149 patients with HbSC/HbSβ+ -thalassaemia (20% HU treated) completed neurocognitive measures at one of four developmental stages: school-age (age 8-9 years), early adolescence (age 12-13 years), late adolescence (age 16-17 years) and young adulthood (ages 19-24 years). For participants with multiple assessments, only the most recent evaluation was included. In multivariable analysis adjusted for social vulnerability, HU treatment and sex, older age was associated with a reduction in overall intelligence quotient (IQ) of 0·55 points per year of life [standard error (SE) = 0·18, false discovery rate adjusted P value (PFDR) = 0.01] for patients with HbSS/HbSβ0 -thalassaemia. Earlier initiation of HU (n = 152) in HbSS/HbSβ0 -thalassaemia was associated with higher scores on neurocognitive measures across most domains, including IQ [estimate (SE) 0·77 (0·25)/year, PFDR = 0·01], after adjusting for social vulnerability, sex and treatment duration. These results support the early use of HU to limit the detrimental neurocognitive effects of SCD, while highlighting the need for additional measures to further mitigate neurocognitive deterioration.
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Affiliation(s)
- Andrew M Heitzer
- Department of Psychology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Jennifer Longoria
- Department of Psychology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Victoria Okhomina
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Winfred C Wang
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Darcy Raches
- Department of Psychology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Brian Potter
- Department of Psychology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Lisa M Jacola
- Department of Psychology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Jerlym Porter
- Department of Psychology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Jane E Schreiber
- Department of Psychology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Allison A King
- Program in Occupational Therapy and Departments of Pediatrics and Medicine, Washington University, St. Louis, MO, USA
| | - Guolian Kang
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Jane S Hankins
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, TN, USA
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23
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Abstract
Newborn screening (NBS) follow-up programs for infants with sickle cell disease (SCD) are highly variable among states. Initiated in 2009, Sickle SAFE, the NBS follow-up program for infants with SCD in Indiana, follows infants through home visits and phone contact. The current study assessed the attainment rates for recently published quality indicators of pediatric SCD care for Sickle SAFE participants. Using retrospective data, we determined the proportion of children who received transcranial Doppler (TCD) screening, influenza, and pneumococcal vaccination and were prescribed hydroxyurea. We calculated the mean age at confirmatory testing, time to receipt of penicillin prophylaxis, and mean age when genetic counseling was offered. One hundred ninety-eight children born with SCD in Indiana between July 1, 2009 and June 30, 2017 were followed for at least 1 year. While 97.5% received at least one dose of conjugated pneumococcal vaccine, vaccination with the 23 valent pneumococcal vaccine varied by location (county) of care (Allen: 14.3%, Lake: 26.7%, St. Joseph: 40.0%, Marion: 73.3%). Overall TCD screening rate for eligible children was 53%; TCD screening rate varied widely by location of care (Lake: 25% vs. Marion: 63.8%). Similarly, hydroxyurea prescribing practices varied significantly by location of care (p < 0.001). Identified gaps in adherence to quality indicators in SCD care will serve as the basis for future quality improvement initiatives.
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24
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Meier ER, Creary SE, Heeney MM, Dong M, Appiah-Kubi AO, Nelson SC, Niss O, Piccone C, Quarmyne MO, Quinn CT, Saving KL, Scott JP, Talati R, Latham TS, Pfeiffer A, Shook LM, Vinks AA, Lane A, McGann PT. Hydroxyurea Optimization through Precision Study (HOPS): study protocol for a randomized, multicenter trial in children with sickle cell anemia. Trials 2020; 21:983. [PMID: 33246482 PMCID: PMC7691962 DOI: 10.1186/s13063-020-04912-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 11/17/2020] [Indexed: 12/22/2022] Open
Abstract
Background Sickle cell disease (SCD) is a severe and devastating hematological disorder that affects over 100,000 persons in the USA and millions worldwide. Hydroxyurea is the primary disease-modifying therapy for the SCD, with proven benefits to reduce both short-term and long-term complications. Despite the well-described inter-patient variability in pharmacokinetics (PK), pharmacodynamics, and optimal dose, hydroxyurea is traditionally initiated at a weight-based dose with a subsequent conservative dose escalation strategy to avoid myelosuppression. Because the dose escalation process is time consuming and requires frequent laboratory checks, many providers default to a fixed dose, resulting in inadequate hydroxyurea exposure and suboptimal benefits for many patients. Results from a single-center trial of individualized, PK-guided dosing of hydroxyurea for children with SCD suggest that individualized dosing achieves the optimal dose more rapidly and provides superior clinical and laboratory benefits than traditional dosing strategies. However, it is not clear whether these results were due to individualized dosing, the young age that hydroxyurea treatment was initiated in the study, or both. The Hydroxyurea Optimization through Precision Study (HOPS) aims to validate the feasibility and benefits of this PK-guided dosing approach in a multi-center trial. Methods HOPS is a randomized, multicenter trial comparing standard vs. PK-guided dosing for children with SCD as they initiate hydroxyurea therapy. Participants (ages 6 months through 21 years), recruited from 11 pediatric sickle cell centers across the USA, are randomized to receive hydroxyurea either using a starting dose of 20 mg/kg/day (Standard Arm) or a PK-guided dose (Alternative Arm). PK data will be collected using a novel sparse microsampling approach requiring only 10 μL of blood collected at 3 time-points over 3 h. A protocol-guided strategy more aggressive protocols is then used to guide dose escalations and reductions in both arms following initiation of hydroxyurea. The primary endpoint is the mean %HbF after 6 months of hydroxyurea. Discussion HOPS will answer important questions about the clinical feasibility, benefits, and safety of PK-guided dosing of hydroxyurea for children with SCD with potential to change the treatment paradigm from a standard weight-based approach to one that safely and effectively optimize the laboratory and clinical response. Trial registration ClinicalTrials.gov NCT03789591. Registered on 28 December 2018.
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Affiliation(s)
- Emily R Meier
- Indiana Hemophilia and Thrombosis Center, Indianapolis, IN, USA
| | - Susan E Creary
- Division of Hematology/Oncology/BMT, Nationwide Children's Hospital, Columbus, OH, USA.,Center for Innovation in Pediatric Practice, Nationwide Children's Hospital Research Institute, The Ohio State University, Columbus, OH, USA
| | - Matthew M Heeney
- Division of Hematology/Oncology, Boston Children's Hospital, Boston, MA, USA.,Harvard Medical School, Boston, MA, USA
| | - Min Dong
- Division of Clinical Pharmacology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Abena O Appiah-Kubi
- Pediatric Hematology, Children's Hospitals and Clinics of Minnesota, Minneapolis and St. Paul, MN, USA
| | - Stephen C Nelson
- Division of Hematology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave, MLC 7015, Cincinnati, OH, 45229, USA
| | - Omar Niss
- University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Department of Pediatrics, Division of Pediatric Hematology, Oncology, and Stem Cell Transplantation, Cohen Children's Medical Center of New York, New Hyde Park, NY, USA
| | - Connie Piccone
- Case Western Reserve University School of Medicine, Department of Hematology and Oncology, University Hospitals Rainbow Babies and Children's, Cleveland, OH, USA
| | - Maa-Ohui Quarmyne
- Emory University School of Medicine & Sickle Cell Disease Program, Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Charles T Quinn
- University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Department of Pediatrics, Division of Pediatric Hematology, Oncology, and Stem Cell Transplantation, Cohen Children's Medical Center of New York, New Hyde Park, NY, USA
| | | | - John P Scott
- Medical College of Wisconsin, Milwaukee, WI, USA
| | | | - Teresa S Latham
- Department of Pediatrics, Division of Pediatric Hematology, Oncology, and Stem Cell Transplantation, Cohen Children's Medical Center of New York, New Hyde Park, NY, USA
| | - Amanda Pfeiffer
- Department of Pediatrics, Division of Pediatric Hematology, Oncology, and Stem Cell Transplantation, Cohen Children's Medical Center of New York, New Hyde Park, NY, USA
| | - Lisa M Shook
- University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Department of Pediatrics, Division of Pediatric Hematology, Oncology, and Stem Cell Transplantation, Cohen Children's Medical Center of New York, New Hyde Park, NY, USA
| | - Alexander A Vinks
- Division of Clinical Pharmacology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.,University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Adam Lane
- University of Cincinnati College of Medicine, Cincinnati, OH, USA.,Department of Pediatrics, Division of Pediatric Hematology, Oncology, and Stem Cell Transplantation, Cohen Children's Medical Center of New York, New Hyde Park, NY, USA
| | - Patrick T McGann
- University of Cincinnati College of Medicine, Cincinnati, OH, USA. .,Department of Pediatrics, Division of Pediatric Hematology, Oncology, and Stem Cell Transplantation, Cohen Children's Medical Center of New York, New Hyde Park, NY, USA.
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25
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Ryan N, Dike L, Ojo T, Vieira D, Nnodu O, Gyamfi J, Peprah E. Implementation of the therapeutic use of hydroxyurea for sickle cell disease management in resource-constrained settings: a systematic review of adoption, cost and acceptability. BMJ Open 2020; 10:e038685. [PMID: 33168553 PMCID: PMC7654121 DOI: 10.1136/bmjopen-2020-038685] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 06/24/2020] [Accepted: 09/08/2020] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVES Mortality associated with sickle cell disease (SCD) is high in many low- and middle-income countries (LMICs). Hydroxyurea, a medicine to effectively manage SCD, is not widely available in resource-constrained settings. We identified and synthesised the reported implementation outcomes for the therapeutic use of hydroxyurea for SCD in these settings. DESIGN Systematic review. DATA SOURCES PubMed, Embase, Cochrane, Web of Science Plus, Global Health, CINAHL, and PsycINFO were searched February through May 2019 without any restrictions on publication date. ELIGIBILITY CRITERIA We included empirical studies of hydroxyurea for management of SCD that were carried out in LMICs and reported on implementation outcomes. DATA EXTRACTION AND SYNTHESIS Two reviewers independently assessed studies for inclusion, carried out data extraction using Proctor et al.'s implementation and health service outcomes, and assessed the risk of bias using ROBINS-I (Risk Of Bias In Non-randomised Studies - of Interventions). RESULTS Two cross-sectional surveys (n=2) and one cohort study (n=1) reported implementation of hydroxyurea for SCD management, namely regarding outcomes of adoption (n=3), cost (n=3) and acceptability (n=1). These studies were conducted exclusively among paediatric and adults populations in clinical settings in Nigeria (n=2) or Jamaica (n=1). Adoption is low, as observed through reported provider practices and patient adherence, in part shaped by misinformation and fear of side effects among patients, provider beliefs regarding affordability and organisational challenges with procuring the medicine. There was no difference in the cost of hydroxyurea therapy compared with blood transfusion in the paediatric population in urban Jamaica. Risk of bias was low or moderate across the included studies. CONCLUSIONS This review rigorously and systematically assessed the evidence on implementation of hydroxyurea in resource-constrained settings such as LMICs. Findings suggest that knowledge regarding implementation is low. To address the know-do gap and guide clinical practice, implementation research is needed. Integrating effective interventions into existing health systems to improve hydroxyurea uptake is essential to reducing SCD-associated mortality. PROSPERO REGISTRATION NUMBER CRD42020155953.
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Affiliation(s)
- Nessa Ryan
- New York University School of Global Pubic Health, New York, NY, USA
| | - Lotanna Dike
- New York University School of Global Pubic Health, New York, NY, USA
| | - Temitope Ojo
- New York University School of Global Pubic Health, New York, NY, USA
| | - Dorice Vieira
- NYU Health Sciences Library, Grossman School of Medicine, New York University, New York, NY, USA
| | - Obiageli Nnodu
- Department of Haematology & Blood Transfusion, Center of Excellence for Sickle Cell Disease Research and Training, Abuja, Nigeria
| | - Joyce Gyamfi
- New York University School of Global Pubic Health, New York, NY, USA
| | - Emmanuel Peprah
- New York University School of Global Pubic Health, New York, NY, USA
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Creary S, Chisolm D, Stanek J, Neville K, Garg U, Hankins JS, O'Brien SH. Measuring hydroxyurea adherence by pharmacy and laboratory data compared with video observation in children with sickle cell disease. Pediatr Blood Cancer 2020; 67:e28250. [PMID: 32386106 DOI: 10.1002/pbc.28250] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 01/31/2020] [Accepted: 02/19/2020] [Indexed: 11/06/2022]
Abstract
BACKGROUND Hydroxyurea nonadherence is common among children with sickle cell disease (SCD), but it is unclear if current adherence measures are valid compared with video directly observed therapy (VDOT), a reference method. The objectives were to evaluate if hydroxyurea adherence by pharmacy records, urine assay, mean corpuscular volume (MCV), and/or fetal hemoglobin (HbF) correlated with and was sensitive and specific compared with VDOT. METHODS This was a cross-sectional analysis of adherence data from 34 children with SCD on a single-arm, six-month hydroxyurea adherence study. Spearman correlation coefficient compared participants' adherence by pharmacy records, MCV, and HbF to adherence by VDOT. The sensitivity and specificity of ≥80% adherence by pharmacy records, two urine samples with hydroxyurea, MCV ≥100 fl/L, and HbF ≥20% compared with ≥80% VDOT adherence were also calculated. RESULTS Median pharmacy and VDOT adherence rates were similar (87.8% vs 88.1%, P = 0.75) and mildly correlated (rs = 0.45; P = 0.008) but the sensitivity of ≥80% adherence by pharmacy records was 72.7% and specificity was 45.5%. MCV (rs = -0.02, P = 0.92) and HbF (rs = -0.2, P = 0.33) did not significantly correlate with VDOT adherence. Sensitivity and specificity were 83.3% and 33.3% for having two urine samples with hydroxyurea, 35% and 71.4% for MCV ≥100 fl/L, and 75% and 0% for HbF ≥20%, respectively. CONCLUSIONS Commonly used tools to measure hydroxyurea adherence may not correlate with or be valid compared with video adherence. Future studies to refine these measures are needed to effectively target adherence interventions to children with SCD who have the potential to benefit. (ClinicalTrials.gov NCT02578017).
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Affiliation(s)
- Susan Creary
- Division of Pediatric Hematology/Oncology/BMT, Nationwide Children's Hospital, The Ohio State University, Columbus, Ohio.,Center for Innovation in Pediatric Practice, Nationwide Children's Hospital, The Ohio State University, Columbus, Ohio
| | - Deena Chisolm
- Center for Innovation in Pediatric Practice, Nationwide Children's Hospital, The Ohio State University, Columbus, Ohio
| | - Joseph Stanek
- Division of Pediatric Hematology/Oncology/BMT, Nationwide Children's Hospital, The Ohio State University, Columbus, Ohio
| | - Kathleen Neville
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Uttam Garg
- Department of Pathology and Laboratory Medicine, Children's Mercy Hospital, Kansas City, Missouri
| | - Jane S Hankins
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Sarah H O'Brien
- Division of Pediatric Hematology/Oncology/BMT, Nationwide Children's Hospital, The Ohio State University, Columbus, Ohio.,Center for Innovation in Pediatric Practice, Nationwide Children's Hospital, The Ohio State University, Columbus, Ohio
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Oldham M, Conrey A, Pittman C, Fisher C, Hargrett S, West K, Jackson M, Martin S, Hsieh MM, Jeffries N, Kaplarevic M, Johnson D, Olkhanud P, Fitzhugh CD. Computer Algorithm-Based Hydroxyurea Dosing Facilitates Titration to Maximum Tolerated Dose in Sickle Cell Anemia. J Clin Pharmacol 2020; 61:41-51. [PMID: 32673439 DOI: 10.1002/jcph.1699] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 06/22/2020] [Indexed: 12/15/2022]
Abstract
Adults with sickle cell disease (SCD) experience acute and chronic complications and die prematurely. When taken at maximum tolerated dose (MTD), hydroxyurea prolongs survival; however, it has not consistently reversed organ dysfunction. Patients also frequently do not take hydroxyurea, at least in part because of physician discomfort with prescribing hydroxyurea. We sought to develop a computer program that could easily titrate hydroxyurea to MTD. This was a single-arm, open-label pilot study. Fifteen patients with homozygous SCD were enrolled in the protocol, and 10 patients were followed at baseline and then for 1 year after hydroxyurea initiation or dose titration. Fetal hemoglobin significantly increased in all 10 patients from 8.3% to 25.1% (P < .001). Nine patients were titrated to MTD in an average of 7.9 months, and the tenth patient's hydroxyurea dose was increased to 33 mg/kg/day. Computer program dosing recommendations were the same as manual dosing decisions made using the same algorithm for all patients and at all times. We also evaluated markers of cardiopulmonary, liver and renal damage. Although cardiopulmonary function did not significantly improve, direct bilirubin and alanine aminotransferase levels significantly decreased (P < .001 and P < .01, respectively). Last, although kidney function did not improve, degree of proteinuria was significantly reduced (P < .05). We have developed a computer program that reliably titrates hydroxyurea to MTD. A larger study is indicated to test the program either as a computer program or a downloadable application.
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Affiliation(s)
| | - Anna Conrey
- Sickle Cell Branch, NHLBI, NIH, Bethesda, Maryland, USA
| | | | | | | | - Kamille West
- Department of Transfusion Medicine, Clinical Center, NIH, Bethesda, Maryland, USA
| | - Mary Jackson
- Sickle Cell Branch, NHLBI, NIH, Bethesda, Maryland, USA
| | - Staci Martin
- Pediatric Oncology Branch, NCI, NIH, Bethesda, Maryland, USA
| | | | - Neal Jeffries
- Office of Biostatistics Research, NHLBI, NIH, Bethesda, Maryland, USA
| | | | - Dachelle Johnson
- Pharmacy Department, Clinical Center, NIH, Bethesda, Maryland, USA
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Hankins JS, Shah N, DiMartino L, Brambilla D, Fernandez ME, Gibson RW, Gordeuk VR, Lottenberg R, Kutlar A, Melvin C, Simon J, Wun T, Treadwell M, Calhoun C, Baumann A, Potter MB, Klesges L, Bosworth H. Integration of Mobile Health Into Sickle Cell Disease Care to Increase Hydroxyurea Utilization: Protocol for an Efficacy and Implementation Study. JMIR Res Protoc 2020; 9:e16319. [PMID: 32442144 PMCID: PMC7388044 DOI: 10.2196/16319] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 04/01/2020] [Accepted: 04/07/2020] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Hydroxyurea prevents disease complications among patients with sickle cell disease (SCD). Although its efficacy has been endorsed by the National Health Lung and Blood Institute evidence-based guidelines, its adoption is low, both by patients with SCD and providers. Mobile health (mHealth) apps provide benefits in improving medication adherence and self-efficacy among patients with chronic diseases and have facilitated prescription among medical providers. However, mHealth has not been systematically tested as a tool to increase hydroxyurea adherence nor has the combination of mHealth been assessed at both patient and provider levels to increase hydroxyurea utilization. OBJECTIVE This study aims to increase hydroxyurea utilization through a combined two-level mHealth intervention for both patients with SCD and their providers with the goals of increasing adherence to hydroxyurea among patients and improve hydroxyurea prescribing behavior among providers. METHODS We will test the efficacy of 2 mHealth interventions to increase both patient and provider utilization and knowledge of hydroxyurea in 8 clinical sites of the NHLBI-funded Sickle Cell Disease Implementation Consortium (SCDIC). The patient mHealth intervention, InCharge Health, includes multiple components that address memory, motivation, and knowledge barriers to hydroxyurea use. The provider mHealth intervention, Hydroxyurea Toolbox (HU Toolbox), addresses the clinical knowledge barriers in prescribing and monitoring hydroxyurea. The primary hypothesis is that among adolescents and adults with SCD, adherence to hydroxyurea, as measured by the proportion of days covered (the ratio of the number of days the patient is covered by the medication to the number of days in the treatment period), will increase by at least 20% after 24 weeks of receiving the InCharge Health app, compared with their adherence at baseline. As secondary objectives, we will (1) examine the change in health-related quality of life, acute disease complications, perceived health literacy, and perceived self-efficacy in taking hydroxyurea among patients who use InCharge Health and (2) examine potential increases in the awareness of hydroxyurea benefits and risks, appropriate prescribing, and perceived self-efficacy to correctly administer hydroxyurea therapy among SCD providers between baseline and 9 months of using the HU Toolbox app. We will measure the reach, adoption, implementation, and maintenance of both the InCharge Health and the HU Toolbox apps using the reach, effectiveness, adoption, implementation, and maintenance framework and qualitatively evaluate the implementation of both mHealth interventions. RESULTS The study is currently enrolling study participants. Recruitment is anticipated to be completed by mid-2021. CONCLUSIONS If this two-level intervention, that is, the combined use of InCharge Health and HU Toolbox apps, demonstrates efficacy in increasing adherence to hydroxyurea and prescribing behavior in patients with SCD and their providers, respectively, both apps will be offered to other institutions outside the SCDIC through a future large-scale implementation-effectiveness study. TRIAL REGISTRATION ClinicalTrials.gov NCT04080167; https://clinicaltrials.gov/ct2/show/NCT04080167. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) DERR1-10.2196/16319.
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Affiliation(s)
- Jane S Hankins
- St. Jude Childrens Research Hospital, Memphis, TN, United States
| | - Nirmish Shah
- Department of Medicine, Duke University, Durham, NC, United States
| | - Lisa DiMartino
- Research Triangle Institute, Research Triangle Park, NC, United States
| | - Donald Brambilla
- Research Triangle Institute, Research Triangle Park, NC, United States
| | - Maria E Fernandez
- University of Texas Health Science Center at Houston School of Public Health, Houston, TX, United States
| | - Robert W Gibson
- Center for Blood Disorders, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Victor R Gordeuk
- Division of Hematology and Oncology, Department of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Richard Lottenberg
- Division of Hematology/Oncology, Department of Medicine, University of Florida, Gainsville, FL, United States
| | - Abdullah Kutlar
- Center for Blood Disorders, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Cathy Melvin
- Department of Public Health Sciences, College of Medicine, Medical University of South Carolina, Charleston, SC, United States
| | - Jena Simon
- Ichan School of Medicine at Mount Sinai, New York, NY, United States
| | - Ted Wun
- Division of Hematology Oncology, UC Davis School of Medicine, Davis, CA, United States
| | - Marsha Treadwell
- University of California San Francisco Benioff Children Hospital Oakland, Oakland, CA, United States
| | - Cecelia Calhoun
- Division of Hematology Oncology, Department of Pediatrics, Washington University, St. Louis, MO, United States
| | - Ana Baumann
- Division of Hematology Oncology, Department of Pediatrics, Washington University, St. Louis, MO, United States
| | - Michael B Potter
- University of California San Francisco School of Medicine, San Francisco, CA, United States
| | - Lisa Klesges
- Division of Hematology Oncology, Department of Pediatrics, Washington University, St. Louis, MO, United States
| | - Hayden Bosworth
- Department of Medicine, Duke University, Durham, NC, United States
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- Bethesda, MA, United States
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Mathias JG, Nolan VG, Meadows‐Taylor M, Robinson LA, Howell KE, Gurney JG, Hankins JS, Wang WC, Estepp JH, Smeltzer MP. A meta-analysis of toxicities related to hydroxycarbamide dosing strategies. EJHAEM 2020; 1:235-238. [PMID: 35847723 PMCID: PMC9176148 DOI: 10.1002/jha2.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 04/07/2020] [Indexed: 11/09/2022]
Abstract
Due to fear of short-term toxicities, there is nonconsensus of hydroxycarbamide dosing strategy (escalated vs fixed-dosing methods), which contributes to its suboptimal use. We performed a meta-analysis to summarize the incidence rates of toxicities associated with both dosing methods. Summarized incidence rates could not be statistically compared between dosing methods due to sparse data. Summarized neutropenia and thrombocytopenia incidence rates were slightly higher when using escalated dosing than with fixed. Summarized reticulocytopenia was comparable. Summarized hepatic and renal toxicities' incidence rates were slightly higher when using fixed doses than with escalated. We recommend diligent and transparent reporting of toxicities.
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Affiliation(s)
- Joacy G. Mathias
- Division of Epidemiology, Biostatistics, and Environmental HealthSchool of Public HealthThe University of MemphisMemphisTennessee
| | - Vikki G. Nolan
- Division of Epidemiology, Biostatistics, and Environmental HealthSchool of Public HealthThe University of MemphisMemphisTennessee
| | - Meghan Meadows‐Taylor
- Division of Epidemiology, Biostatistics, and Environmental HealthSchool of Public HealthThe University of MemphisMemphisTennessee
| | - L. Ashley Robinson
- Division of Epidemiology, Biostatistics, and Environmental HealthSchool of Public HealthThe University of MemphisMemphisTennessee
| | - Kristen E. Howell
- Division of Epidemiology, Biostatistics, and Environmental HealthSchool of Public HealthThe University of MemphisMemphisTennessee
| | - James G. Gurney
- Division of Epidemiology, Biostatistics, and Environmental HealthSchool of Public HealthThe University of MemphisMemphisTennessee
| | - Jane S. Hankins
- Department of HematologySt. Jude Children's Research HospitalMemphisTennessee
| | - Winfred C. Wang
- Department of HematologySt. Jude Children's Research HospitalMemphisTennessee
| | - Jeremie H. Estepp
- Department of HematologySt. Jude Children's Research HospitalMemphisTennessee
- Department of PathologySt. Jude Children's Research HospitalMemphisTennessee
| | - Matthew P. Smeltzer
- Division of Epidemiology, Biostatistics, and Environmental HealthSchool of Public HealthThe University of MemphisMemphisTennessee
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Abstract
Sickle cell disease (SCD) afflicts millions of people worldwide but is referred to as an orphan disease in the United States. Over the past several decades, there has been an increasing understanding of the pathophysiology of SCD and its complications. While most individuals with SCD in resource-rich countries survive into adulthood, the life expectancy of patients with SCD remains substantially shorter than for the general African-American population. SCD can be cured using hematopoietic stem cell transplantation and possibly gene therapy, but these treatment approaches are not available to most patients, the majority of whom reside in low- and middle-income countries. Until relatively recently, only one drug, hydroxyurea, was approved by the US Food and Drug Administration to ameliorate disease severity. Multiple other drugs (L-glutamine, crizanlizumab, and voxelotor) have recently been approved for the treatment of SCD, with several others at various stages of clinical testing. The availability of multiple agents to treat SCD raises questions related to the choice of appropriate drug therapy, combination of multiple agents, and affordability of recently approved products. The enthusiasm for new drug development provides opportunities to involve patients in low- and middle-income nations in the testing of potentially disease-modifying therapies and has the potential to contribute to capacity building in these environments. Demonstration that these agents, alone or in combination, can prevent or decrease end-organ damage would provide additional evidence for the role of drug therapies in improving outcomes in SCD.
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Affiliation(s)
- Parul Rai
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Kenneth I. Ataga
- Center for Sickle Cell Disease, University of Tennessee Health Science Center, Memphis, TN, USA
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31
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de Azevedo JTC, Malmegrim KCR. Immune mechanisms involved in sickle cell disease pathogenesis: current knowledge and perspectives. Immunol Lett 2020; 224:1-11. [PMID: 32437728 DOI: 10.1016/j.imlet.2020.04.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 04/02/2020] [Accepted: 04/18/2020] [Indexed: 12/18/2022]
Abstract
Sickle cell disease (SCD) is caused by a single point mutation in the β-chain of the hemoglobin gene that results in the replacement of glutamic acid with valine in the hemoglobin protein. However, recent studies have demonstrated that alterations in several other genes, especially immune related genes, may be associated with complications of SCD. In fact, higher chronic inflammatory status is related to more severe clinical symptoms in SCD patients, suggesting crucial roles of the immune system in SCD physiopathology. Nevertheless, although participation of innate immune cells in SCD pathogenesis has been broadly and extensively described, little is known about the roles of the adaptive immune system in this disease. In addition, the influence of treatments on the immune system of SCD patients and their complications (such as alloimmunization) are not yet completely understood. Thus, we reviewed the current knowledge about the immune mechanisms involved in SCD pathogenesis. We suggest recommendations for future studies to allow for a broader understanding of SCD pathogenesis, helping in the development of new therapies and improvement in the life quality and expectancy of patients.
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Affiliation(s)
- Júlia Teixeira Cottas de Azevedo
- Center for Cell-based Therapy, Regional Blood Center of Ribeirão Preto, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil; Department of Biochemistry and Immunology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Kelen Cristina Ribeiro Malmegrim
- Center for Cell-based Therapy, Regional Blood Center of Ribeirão Preto, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil; Department of Clinical, Toxicological and Bromatological Analysis, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.
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32
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Creary SE, Modi AC, Stanek JR, Chisolm DJ, O'Brien SH, Nwankwo C, Crosby LE. Allocation of Treatment Responsibility and Adherence to Hydroxyurea Among Adolescents With Sickle Cell Disease. J Pediatr Psychol 2020; 44:1196-1204. [PMID: 31403687 DOI: 10.1093/jpepsy/jsz061] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 06/25/2019] [Accepted: 07/02/2019] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVE Adolescents with sickle cell disease (SCD) are at increased risk for complications. Hydroxyurea is a medication that can ameliorate risk but to benefit, adolescents must adhere to treatment. Study aims were to describe how adolescents and their caregivers decided who was responsible for treatment tasks, to describe adolescents' and caregivers' responsibility for these tasks, and to examine if hydroxyurea adherence was associated with younger adolescent age, less discrepancy between adolescents' and caregivers' reports of adolescent responsibility, and higher caregiver involvement. METHODS Twenty-nine dyads completed treatment responsibility measures. A combination of laboratory and electronic prescription data were used to determine hydroxyurea adherence and electronic medical records were used to determine appointment adherence. RESULTS Few dyads agreed or planned how to complete treatment tasks. Adolescents shared responsibility with caregivers for medication-taking tasks. Adolescents perceived caregivers and caregivers perceived adolescents were overall responsible for treatment, especially for appointment tasks. Half of adolescents were adherent to hydroxyurea and half were adherent to appointments but medication adherence was not associated with age, discrepancy between adolescents' and caregivers' responses, or caregiver involvement. CONCLUSIONS Despite frequent hydroxyurea and appointment nonadherence, few adolescents and caregivers plan how to manage adolescents' SCD treatment or perceive they are overall responsible. Future studies are needed to determine the factors that influence these perceptions and if increasing adolescent and caregiver treatment planning improves adherence and clinical outcomes.
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Affiliation(s)
- Susan E Creary
- Center for Innovation in Pediatric Practice, Nationwide Children's Hospital Research Institute, The Ohio State University.,Division of Hematology/Oncology/BMT Nationwide Children's Hospital
| | - Avani C Modi
- Division of Behavioral Medicine and Clinical Psychology, Cincinnati Children's Hospital Medical Center.,College of Medicine, University of Cincinnati
| | - Joseph R Stanek
- Division of Hematology/Oncology/BMT Nationwide Children's Hospital
| | - Deena J Chisolm
- Center for Innovation in Pediatric Practice, Nationwide Children's Hospital Research Institute, The Ohio State University
| | - Sarah H O'Brien
- Center for Innovation in Pediatric Practice, Nationwide Children's Hospital Research Institute, The Ohio State University.,Division of Hematology/Oncology/BMT Nationwide Children's Hospital
| | - Cara Nwankwo
- Division of Behavioral Medicine and Clinical Psychology, Cincinnati Children's Hospital Medical Center
| | - Lori E Crosby
- Division of Behavioral Medicine and Clinical Psychology, Cincinnati Children's Hospital Medical Center.,College of Medicine, University of Cincinnati
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Oron AP, Chao DL, Ezeanolue EE, Ezenwa LN, Piel FB, Ojogun OT, Uyoga S, Williams TN, Nnodu OE. Caring for Africa's sickle cell children: will we rise to the challenge? BMC Med 2020; 18:92. [PMID: 32340612 PMCID: PMC7187492 DOI: 10.1186/s12916-020-01557-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 03/12/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Most of the world's sickle cell disease (SCD) burden is in Africa, where it is a major contributor to child morbidity and mortality. Despite the low cost of many preventive SCD interventions, insufficient resources have been allocated, and progress in alleviating the SCD burden has lagged behind other public-health efforts in Africa. The recent announcement of massive new funding for research into curative SCD therapies is encouraging in the long term, but over the next few decades, it is unlikely to help Africa's SCD children substantially. MAIN DISCUSSION A major barrier to progress has been the absence of large-scale early-life screening. Most SCD deaths in Africa probably occur before cases are even diagnosed. In the last few years, novel inexpensive SCD point-of-care test kits have become widely available and have been deployed successfully in African field settings. These kits could potentially enable universal early SCD screening. Other recent developments are the expansion of the pneumococcal conjugate vaccine towards near-universal coverage, and the demonstrated safety, efficacy, and increasing availability and affordability of hydroxyurea across the continent. Most elements of standard healthcare for SCD children that are already proven to work in the West, could and should now be implemented at scale in Africa. National and continental SCD research and care networks in Africa have also made substantial progress, assembling care guidelines and enabling the deployment and scale-up of SCD public-health systems. Substantial logistical, cultural, and awareness barriers remain, but with sufficient financial and political will, similar barriers have already been overcome in efforts to control other diseases in Africa. CONCLUSION AND RECOMMENDATIONS Despite remaining challenges, several high-SCD-burden African countries have the political will and infrastructure for the rapid implementation and scale-up of comprehensive SCD childcare programs. A globally funded effort starting with these countries and expanding elsewhere in Africa and to other high-burden countries, including India, could transform the lives of SCD children worldwide and help countries to attain their Sustainable Development Goals. This endeavor would also require ongoing research focused on the unique needs and challenges of SCD patients, and children in particular, in regions of high prevalence.
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Affiliation(s)
- Assaf P Oron
- Maternal, Newborn and Child Health, Institute for Disease Modeling, Bellevue, WA, USA
| | - Dennis L Chao
- Maternal, Newborn and Child Health, Institute for Disease Modeling, Bellevue, WA, USA
| | - Echezona E Ezeanolue
- Healthy Sunrise Foundation, Las Vegas, NV, USA
- College of Medicine, University of Nigeria, Nsukka, Nigeria
| | | | - Frédéric B Piel
- Department of Epidemiology & Biostatistics, School of Public Health, Faculty of Medicine, Imperial College London, London, UK
| | | | - Sophie Uyoga
- KEMRI-Wellcome Trust Research Programme, PO Box 230, Kilifi, Kenya
| | | | - Obiageli E Nnodu
- Centre of Excellence for Sickle Cell Disease Research & Training, University of Abuja, Abuja, Nigeria
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Abstract
Despite sickle cell disease (SCD) being the most common and severe inherited condition worldwide, therapeutic options are limited. To date, hydroxyurea remains the main treatment option in SCD. However, in the last decade the numbers of interventional clinical trials focussing on therapies for SCD have increased significantly. Many new drugs with various pharmacological targets have emerged and, although the majority have failed to show benefit in clinical trials, some have produced encouraging results. It seems probable that more drugs will soon become available for the treatment of SCD. Furthermore, promising clinical trials with improved outcomes have recently changed the perspective of curative therapies in SCD. Nevertheless, the application of novel therapeutic agents and potential curative treatments will most likely be limited to high-income countries and, thus, will remain unavailable for the majority of people with SCD in the foreseeable future.
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Affiliation(s)
- Amina Nardo-Marino
- Centre for Haemoglobinopathies, Department of Haematology, Herlev and Gentofte Hospital, University of Copenhagen, Herlev, Denmark
| | - Valentine Brousse
- Sickle Cell Disease Reference Center, Department of General Pediatrics and Pediatric Infectious Diseases, Necker-Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - David Rees
- Department of Haematological Medicine, King's College London, King's College Hospital, London, UK
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35
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Azmet FR, Al-Kasim F, Alashram WM, Siddique K. The role of hydroxyurea in decreasing the occurrence of vasso-occulusive crisis in pediatric patients with sickle cell disease at King Saud Medical City in Riyadh, Saudi Arabia. Saudi Med J 2020; 41:46-52. [PMID: 31915794 PMCID: PMC7001066 DOI: 10.15537/smj.2020.1.24698] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 10/29/2019] [Indexed: 02/02/2023] Open
Abstract
OBJECTIVES To measure the incidence of vaso-occlusive crises (VOC) and the role of hydroxyurea (HU) in reducing VOC in sickle cell anemia patients being treated at a large tertiary care setting in Kingdom of Saudi Arabia (KSA). The secondary objective of this study is to observe the gradual improvement in laboratory data (white blood cell [WBC], platelets, mean corpuscular volume [MCV], hemoglobin [Hgb], HgbF) following regular use of HU. Methods: Clinical effectiveness of HU was evaluated in a large pediatric population using a retrospective cohort, non-interventional, pre-post treatment study designed to control disease severity selection bias. The cohort included children with SCA (sickle cell (SS), sickle-beta thalassemia) at King Saud Medical City, Riyadh, KSA, who initiated HU between January 2012 and June 2017. For each patient healthcare utilization, laboratory values, and clinical outcomes were observed for an equal duration of time pre and post hydroxyurea. Results: Out of 416 SCD patients, 128 children with SCD who initiated HU, of them 82 met the eligibility criteria. After initiation of HU, there was significant reduction in both VOC (80%) and length of stay (LOS) (73%). Significant increase in Hgb (13%), MCV (10%), and HgbF (28%) and significant decrease in WBC (28%) was observed. Only the mean platelet count decreased by 3% with a p greater than 0.05. Conclusion: Hydroxyurea treatment significantly decreased episodes of VOC and LOS, it also led to reductions in hospitalizations and significant improvement in complete blood count indices.
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Affiliation(s)
- Fauzia R Azmet
- Department of Pediatric Hematology and Oncology, King Saud Medical City, Riyadh, Kingdom of Saudi Arabia. E-mail.
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Olubiyi OO, Olagunju MO, Strodel B. Rational Drug Design of Peptide-Based Therapies for Sickle Cell Disease. Molecules 2019; 24:E4551. [PMID: 31842406 PMCID: PMC6943517 DOI: 10.3390/molecules24244551] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/08/2019] [Accepted: 12/09/2019] [Indexed: 11/16/2022] Open
Abstract
Sickle cell disease (SCD) is a group of inherited disorders affecting red blood cells, which is caused by a single mutation that results in substitution of the amino acid valine for glutamic acid in the sixth position of the β-globin chain of hemoglobin. These mutant hemoglobin molecules, called hemoglobin S, can polymerize upon deoxygenation, causing erythrocytes to adopt a sickled form and to suffer hemolysis and vaso-occlusion. Until recently, only two drug therapies for SCD, which do not even fully address the manifestations of SCD, were approved by the United States (US) Food and Drug Administration. A third treatment was newly approved, while a monoclonal antibody preventing vaso-occlusive crises is also now available. The complex nature of SCD manifestations provides multiple critical points where drug discovery efforts can be and have been directed. These notwithstanding, the need for new therapeutic approaches remains high and one of the recent efforts includes developments aimed at inhibiting the polymerization of hemoglobin S. This review focuses on anti-sickling approaches using peptide-based inhibitors, ranging from individual amino acid dipeptides investigated 30-40 years ago up to more promising 12- and 15-mers under consideration in recent years.
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Affiliation(s)
- Olujide O. Olubiyi
- Institute of Complex Systems: Structural Biochemistry, Forschungszentrum Jülich, 52425 Jülich, Germany; (M.O.O.); (B.S.)
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Obafemi Awolowo University, Ile-Ife 220282, Nigeria
| | - Maryam O. Olagunju
- Institute of Complex Systems: Structural Biochemistry, Forschungszentrum Jülich, 52425 Jülich, Germany; (M.O.O.); (B.S.)
| | - Birgit Strodel
- Institute of Complex Systems: Structural Biochemistry, Forschungszentrum Jülich, 52425 Jülich, Germany; (M.O.O.); (B.S.)
- Institute of Theoretical and Computational Chemistry, Heinrich Heine University Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
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Mvalo T, Topazian HM, Kamthunzi P, Chen JS, Kambalame I, Mafunga P, Mumba N, Chiume M, Paseli K, Tegha G, Kumwenda W, Heimlich JB, Ellis G, Key N, Gopal S, Hoffman I, Ataga KI, Westmoreland KD. Real-world experience using hydroxyurea in children with sickle cell disease in Lilongwe, Malawi. Pediatr Blood Cancer 2019; 66:e27954. [PMID: 31397075 PMCID: PMC6754288 DOI: 10.1002/pbc.27954] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 07/04/2019] [Accepted: 07/20/2019] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Sickle cell disease (SCD) is among the most common inherited hematologic diseases in sub-Saharan Africa (SSA). Historically, hydroxyurea administration in SSA has been restricted due to limited region-specific evidence for safety and efficacy. METHODS We conducted a prospective observational cohort study of pediatric patients with SCD in Malawi. From January 2015 to November 2017, hydroxyurea at doses of 10-20 mg/kg/day was administered to children with clinically severe disease (targeted use policy). From December 2017 to July 2018, hydroxyurea was prescribed to all patients (universal use policy). RESULTS Of 187 patients with SCD, seven (3.7%) died and 23 (12.3%) were lost to follow-up. The majority (135, 72.2%) were prescribed hydroxyurea, 59 (43.7%) under the targeted use policy and 76 (56.3%) under the universal use policy. There were no documented severe toxicities. Under the targeted use policy, children with SCD demonstrated absolute decreases in the rates of hospitalization (-4.1 per 1000 person-days; -7.2, -1.0; P = .004), fevers (-4.2 per 1000 person-days; -7.2, -1.1; P = .002), transfusions (-2.3 per 1000 person-days; 95% confidence interval: -4.9, 0.3; P = .06), and annual school absenteeism (-51.2 per person-year; -60.1, -42.3; P < .0001) within 6 months of hydroxyurea commencement. CONCLUSION We successfully implemented universal administration of hydroxyurea to children with SCD at a tertiary hospital in Malawi. Similar to recently reported trials, hydroxyurea was safe and effective during routine programmatic experience, with clinical benefits particularly among high-risk children. This highlights the importance of continued widespread scale-up of hydroxyurea within SCD programs across SSA.
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Affiliation(s)
- Tisungane Mvalo
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Department of Pediatrics, UNC, Chapel Hill, NC, USA
| | - Hillary M. Topazian
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Department of Epidemiology, UNC, Chapel Hill. NC, USA
| | - Portia Kamthunzi
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Institute for Global Health and Infectious Diseases, UNC, Chapel Hill, NC, USA
| | - Jane S. Chen
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Department of Epidemiology, UNC, Chapel Hill. NC, USA
| | - Isobel Kambalame
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi
| | - Pilirani Mafunga
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi
| | - Noel Mumba
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi
| | - Msandeni Chiume
- Department of Pediatrics, Kamuzu Central Hospital (KCH), Ministry of Health, Lilongwe, Malawi
| | - Khadija Paseli
- Department of Pediatrics, Kamuzu Central Hospital (KCH), Ministry of Health, Lilongwe, Malawi
| | - Gerald Tegha
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi
| | - Wiza Kumwenda
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi
| | | | - Graham Ellis
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi
| | - Nigel Key
- Division of Hematology-Oncology, UNC, Chapel Hill, NC, USA
| | - Satish Gopal
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Department of Epidemiology, UNC, Chapel Hill. NC, USA,Institute for Global Health and Infectious Diseases, UNC, Chapel Hill, NC, USA,Division of Hematology-Oncology, UNC, Chapel Hill, NC, USA
| | - Irving Hoffman
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Institute for Global Health and Infectious Diseases, UNC, Chapel Hill, NC, USA
| | - Kenneth I. Ataga
- Center for Sickle Cell Disease, University of Tennessee Health Science Center at Memphis, TN, USA
| | - Kate D. Westmoreland
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Division of Pediatric Hematology-Oncology, UNC, Chapel Hill, NC, USA
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Optimizing Hydroxyurea Treatment for Sickle Cell Disease Patients: The Pharmacokinetic Approach. J Clin Med 2019; 8:jcm8101701. [PMID: 31623213 PMCID: PMC6833033 DOI: 10.3390/jcm8101701] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/09/2019] [Accepted: 10/11/2019] [Indexed: 12/18/2022] Open
Abstract
Background: Hydroxyurea (HU) is a FDA- and EMA-approved drug that earned an important place in the treatment of patients with severe sickle cell anemia (SCA) by showing its efficacy in many studies. This medication is still underused due to fears of physicians and families and must be optimized. Methods: We analyzed our population and identified HU pharmacokinetic (PK) parameters in order to adapt treatment in the future. Working with a pediatric population, we searched for the most indicative sampling time to reduce the number of samples needed. Results: Nine children treated by HU for severe SCA were included for this PK study. HU quantification was made using a validated gas chromatography/mass spectrometry (GC/MS) method. Biological parameters (of effectiveness and compliance) and clinical data were collected. None of the nine children reached the therapeutic target defined by Dong et al. as an area under the curve (AUC) = 115 h.mg/L; four patients were suspected to be non-compliant. Only two patients had an HbF over 20%. The 2 h sample was predictive of the medication exposure (r2 = 0.887). Conclusions: It is urgent to be more efficient in the treatment of SCA, and pharmacokinetics can be an important asset in SCA patients.
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Effectiveness and Safety of Hydroxyurea in the Treatment of Sickle Cell Anaemia Children in Jos, North Central Nigeria. J Trop Pediatr 2019; 66:290-298. [PMID: 31608959 PMCID: PMC7249733 DOI: 10.1093/tropej/fmz070] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND Hydroxyurea has been shown to positively modify sickle cell disease pathogenesis, but its use is low among Nigerian sickle cell anaemia (SCA) patients because of effectiveness and safety concerns. METHODS We conducted a quasi-experimental study to evaluate the effectiveness and safety of hydroxyurea in 54 SCA children aged 4-17 years. Clinical and haematological parameters were compared at baseline and 12 months after hydroxyurea therapy. The participants were monitored for adverse events. The parameters were compared using relative risk and Wilcoxon Signed-Rank Test. RESULTS The number of subjects who had more than two episodes of painful crises reduced from 27 (50%) to 2 (2.7%) (p < 0.001), while those who had acute chest syndrome reduced from 6 (11.1%) to 0 (0.0%; p < 0.001). The risk of being transfused more than once was 0.11 times the risk in the 12 months period preceding therapy (95% CI = 0.02-0.85; p = 0.016). Similarly, the risk of hospital stay >7 days was 0.08 times the risk at the baseline (95% CI = 0.02-0.24; p < 0.0001). The median haematocrit and percentage foetal haemoglobin increased from 26 to 28% and 7.8 to 14%, respectively (p < 0.0001). A dose-dependent but reversible leucopenia was observed among six children (11.1%), otherwise, hydroxyurea was safe in the study population. CONCLUSION Hydroxyurea is effective and safe in SCA children in Jos, Nigeria. The findings could strengthen educational programme aimed at improving the utilization of hydroxyurea among SCA children.
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Thomas R, Dulman R, Lewis A, Notarangelo B, Yang E. Prospective longitudinal follow-up of children with sickle cell disease treated with hydroxyurea since infancy. Pediatr Blood Cancer 2019; 66:e27816. [PMID: 31157521 DOI: 10.1002/pbc.27816] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 04/09/2019] [Accepted: 04/18/2019] [Indexed: 02/02/2023]
Abstract
BACKGROUND Hydroxyurea (HU) increases fetal hemoglobin (HgbF) and ameliorates sickle cell disease (SCD) symptoms. Studies have demonstrated the safety and efficacy of HU in infants and children. Initiation of HU in infancy for children with SCD needs to be implemented in community practice. PROCEDURE Starting in 2011, the Pediatric Sickle Cell Program of Northern Virginia initiated HU in infants with SCD. A prospective longitudinal database tracked the clinical course and outcomes. RESULTS Twenty-four children with HgbSS who started HU by age 1 were continuously followed for a total of 95 person-years. Age at the time of analysis ranged from 2 to 7 years. Average hemoglobin at 6-month intervals ranged from 9.5 + 1.9 to 10.7 + 0.8 g/dL, and average HgbF ranged from 27.8 + 5.0% to 34.1 + 6.6%. Twenty-seven hospitalizations occurred (0.28/person-year), all before age 3, including 19 (70%) for fever or infection, five (19%) for splenic sequestration, and one (4%) for pain in an infant prior to starting HU. The treat-and-release emergency department visits totaled 68 (0.72/person-year), including 62 visits (91%) for fever, infection, or viral illness, and two visits (3%) for pain/dactylitis in infants before HU initiation. Splenic sequestration accounted for all five transfusions. No pain episodes requiring medical attention were documented after HU initiation. No complicated acute chest syndrome, no abnormal or conditional transcranial Doppler ultrasound, and no overt strokes occurred. CONCLUSION Implementation of HU in infancy for patients with SCD in community practice is feasible and is highly effective in preventing disease complications.
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Affiliation(s)
- Ronay Thomas
- Department of Hematology-Oncology, Pediatric Specialists of Virginia, Falls Church, Virginia
| | - Robin Dulman
- Department of Hematology-Oncology, Pediatric Specialists of Virginia, Falls Church, Virginia.,Department of Pediatics, Virginia Commonwealth University School of Medicine, Inova Campus, Falls Church, Virginia
| | - Angela Lewis
- Department of Hematology-Oncology, Pediatric Specialists of Virginia, Falls Church, Virginia
| | - Bailey Notarangelo
- Department of Hematology-Oncology, Pediatric Specialists of Virginia, Falls Church, Virginia
| | - Elizabeth Yang
- Department of Hematology-Oncology, Pediatric Specialists of Virginia, Falls Church, Virginia.,Department of Pediatics, Virginia Commonwealth University School of Medicine, Inova Campus, Falls Church, Virginia.,Department of Pediatrics, George Washington University School of Medicine, Washington, District of Columbia
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Adeyemo TA, Diaku-Akinwunmi IN, Ojewunmi OO, Bolarinwa AB, Adekile AD. Barriers to the use of hydroxyurea in the management of sickle cell disease in Nigeria. Hemoglobin 2019; 43:188-192. [PMID: 31462098 DOI: 10.1080/03630269.2019.1649278] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Hydroxyurea (HU) is a well-known Hb F-inducing agent with proven clinical and laboratory efficacy for patients with sickle cell disease. However, concerns about its long-term safety and toxicity have limited its prescription by physicians and acceptability by patients. Thus, this study aims to evaluate clinician's barriers to the use of HU in the management of patients with sickle cell disease in Nigeria. An online survey targeted physicians in pediatrics, hematology, medicine, family medicine and general medical practice managing sickle cell disease in Nigeria. The survey was in four sections: demographic, knowledge and experience with HU, and barriers to the use of HU. Ninety-one (73.0%) of 123 contacts completed the survey. Seventy-three percent and 74.0% of the respondents noted that HU reduced transfusion rates and improved overall quality of life (QOL) of patients, respectively. While the majority of the practitioners (55.6%) see between 10-50 patients per month, most (66.7%) write <5 prescriptions for HU per month. Lack of a national guideline for use of HU, especially in children (52.0%), concern for infertility (52.0%), and safety profile of HU in pregnancy and lactation (48.2%), top the factors considered by the respondents as major barriers to the use of HU. Hydroxyurea is grossly under prescribed in Nigeria, despite that the vast majority of physicians who attend patients with sickle cell disease know about its clinical efficacy. Evidence-based clinical practice guidelines could be explored as a way to standardize practices and improve confidence of practitioners to improve physicians' prescription of HU in the management of sickle cell disease.
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Affiliation(s)
- Titilope A Adeyemo
- Department of Haematology and Blood Transfusion, College of Medicine, University of Lagos , Lagos , Nigeria.,Department of Haematology and Blood Transfusion, Lagos University Teaching Hospital , Id-Aarba , Lagos , Nigeria
| | | | | | - Abiola B Bolarinwa
- Department of Haematology and Blood Transfusion, Lagos University Teaching Hospital , Id-Aarba , Lagos , Nigeria
| | - Adekunle D Adekile
- Department of Paediatrics, Faculty of Medicine, Kuwait University , Kuwait City , Kuwait
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McGann PT, Niss O, Dong M, Marahatta A, Howard TA, Mizuno T, Lane A, Kalfa TA, Malik P, Quinn CT, Ware RE, Vinks AA. Robust clinical and laboratory response to hydroxyurea using pharmacokinetically guided dosing for young children with sickle cell anemia. Am J Hematol 2019; 94:871-879. [PMID: 31106898 DOI: 10.1002/ajh.25510] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 05/09/2019] [Accepted: 05/13/2019] [Indexed: 01/01/2023]
Abstract
Hydroxyurea is FDA-approved and now increasingly used for children with sickle cell anemia (SCA), but dosing strategies, pharmacokinetic (PK) profiles, and treatment responses for individual patients are highly variable. Typical weight-based dosing with step-wise escalation to maximum tolerated dose (MTD) leads to predictable laboratory and clinical benefits, but often takes 6 to 12 months to achieve. The Therapeutic Response Evaluation and Adherence Trial (TREAT, NCT02286154) was a single-center study designed to prospectively validate a novel personalized PK-guided hydroxyurea dosing strategy with a primary endpoint of time to MTD. Enrolled participants received a single oral 20 mg/kg dose of hydroxyurea, followed by a sparse PK sampling approach with three samples collected over three hours. Analysis of individual PK data into a population PK model generated a starting dose that targets the MTD. The TREAT cohort (n = 50) was young, starting hydroxyurea at a median age of 11 months (IQR 9-26 months), and PK-guided starting doses were high (27.7 ± 4.9 mg/kg/d). Time to MTD was 4.8 months (IQR 3.3-9.3), significantly shorter than comparison studies (p < 0.0001), thus meeting the primary endpoint. More remarkably, the laboratory response for participants starting with a PK-guided dose was quite robust, achieving higher hemoglobin (10.1 ± 1.3 g/dL) and HbF (33.3 ± 9.1%) levels than traditional dosing. Though higher than traditional dosing, PK-guided doses were safe without excess hematologic toxicities. Our data suggest early initiation of hydroxyurea, using a personalized dosing strategy for children with SCA, provides laboratory and clinical response beyond what has been seen historically, with traditional weight-based dosing.
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Affiliation(s)
- Patrick T. McGann
- Division of HematologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
- Department of PediatricsUniversity of Cincinnati College of Medicine Cincinnati Ohio
| | - Omar Niss
- Division of HematologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
- Department of PediatricsUniversity of Cincinnati College of Medicine Cincinnati Ohio
| | - Min Dong
- Department of PediatricsUniversity of Cincinnati College of Medicine Cincinnati Ohio
- Division of Clinical PharmacologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
| | - Anu Marahatta
- Division of HematologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
| | - Thad A. Howard
- Division of HematologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
| | - Tomoyuki Mizuno
- Division of Clinical PharmacologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
| | - Adam Lane
- Division of HematologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
- Department of PediatricsUniversity of Cincinnati College of Medicine Cincinnati Ohio
| | - Theodosia A. Kalfa
- Division of HematologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
- Department of PediatricsUniversity of Cincinnati College of Medicine Cincinnati Ohio
| | - Punam Malik
- Division of HematologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
- Department of PediatricsUniversity of Cincinnati College of Medicine Cincinnati Ohio
| | - Charles T. Quinn
- Division of HematologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
- Department of PediatricsUniversity of Cincinnati College of Medicine Cincinnati Ohio
| | - Russell E. Ware
- Division of HematologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
- Department of PediatricsUniversity of Cincinnati College of Medicine Cincinnati Ohio
| | - Alexander A. Vinks
- Department of PediatricsUniversity of Cincinnati College of Medicine Cincinnati Ohio
- Division of Clinical PharmacologyCincinnati Children's Hospital Medical Center Cincinnati Ohio
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Park H, Bhatti S, Chakravorty S. Effectiveness of hydroxycarbamide in children with sickle cell disease - Analysis of dose-response metrics in a large birth cohort in a tertiary sickle cell centre. Pediatr Blood Cancer 2019; 66:e27615. [PMID: 30666787 DOI: 10.1002/pbc.27615] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 12/11/2018] [Accepted: 01/05/2019] [Indexed: 12/24/2022]
Abstract
BACKGROUND Despite the well-established efficacy of hydroxycarbamide in the management of sickle cell disease (SCD), the paucity of real-world clinical data limits the establishment of a practical dosing strategy. The aim of this study was to analyse the dose-response metrics of hydroxycarbamide associated with the minimum effective dose protocol - specifically, between dose groups and differing degrees of myelosuppression. DESIGN/METHODS A retrospective cohort study was conducted on 93 patients who were initiated on hydroxycarbamide between 2005 and 2017 at a tertiary haemoglobinopathy centre in London, UK. The burden of acute SCD-related complications was defined by the annualised rates of emergency department attendances and hospital admissions. Secondary outcomes included haematological, biochemical, liver, renal and transcranial Doppler velocity status. Comparisons were performed upon stratification via dose (<20 mg/kg/day, 20-24 mg/kg/day and ≥25 mg/kg/day) and sustained absolute neutrophil count (ANC) values (ANC <4 × 109 /L and ANC ≥4 × 109 /L). RESULTS Clinical outcomes were not predicted by dose or ANC values. Whilst laboratory indices between dose groups were also non-statistically significant, patients maintained on ANC <4 × 109 /L were shown to achieve superior responses in haemoglobin, haemoglobin F, absolute reticulocyte count and liver function. Toxicities occurred idiosyncratically, with minimal reports of transient neutropaenia and thrombocytopaenia. CONCLUSIONS Objective clinical responses may be achievable without intensive dose escalation. Our finding that greater myelosuppression is associated with greater improvements in laboratory markers of clinical benefit is consistent with prior clinical trials, but ongoing effectiveness studies are needed to determine whether these benefits can be reliably demonstrated in routine clinical practice using different dosing protocols.
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Affiliation(s)
- Hyun Park
- Department of Medicine, Imperial College London, London, UK
| | - Sabah Bhatti
- Department of Haematology, King's College Hospital, London, UK
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Mburu J, Odame I. Sickle cell disease: Reducing the global disease burden. Int J Lab Hematol 2019; 41 Suppl 1:82-88. [PMID: 31069977 DOI: 10.1111/ijlh.13023] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 03/08/2019] [Accepted: 03/12/2019] [Indexed: 12/19/2022]
Abstract
Sickle cell disease has been largely an invisible global health issue, especially in regions of high incidence mainly due to lack of awareness among both the local health policy makers and the public. Public health interventions, such as screening of newborns, provision of prophylaxis against bacterial infections, and immunizations against pneumococcal infections can have the greatest impact. Family education on assessment of spleen size and subsequent detection of splenic sequestration and promptness to seek medical attention for a febrile child is also important in the control of the morbidity and mortality of children with SCD living in resource-poor countries. In addition to these affordable interventions, hydroxyurea therapy is necessary to decrease both the acute and chronic complications of sickle cell anemia. Sickle cell disease has been recognized to have global health significance by key institutions including the World Health Organization in 2006 and the United Nation is 2008. In 2010, the WHO released national health care management goals and set targets to be achieved by the countries in sub-Saharan Africa for the control and management of SCD. These are yet to be translated into action. To do, this would require active and sustainable public-private partnerships for sustainable program development in these regions. Effective interventions should be integrated into existing health systems, the best examples linking primary healthcare facilities to specialized sickle cell disease centers in regional and tertiary healthcare institutions.
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Affiliation(s)
- Joy Mburu
- Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
| | - Isaac Odame
- Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
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Russo G, De Franceschi L, Colombatti R, Rigano P, Perrotta S, Voi V, Palazzi G, Fidone C, Quota A, Graziadei G, Pietrangelo A, Pinto V, Ruffo GB, Sorrentino F, Venturelli D, Casale M, Ferrara F, Sainati L, Cappellini MD, Piga A, Maggio A, Forni GL. Current challenges in the management of patients with sickle cell disease - A report of the Italian experience. Orphanet J Rare Dis 2019; 14:120. [PMID: 31146777 PMCID: PMC6543611 DOI: 10.1186/s13023-019-1099-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 05/19/2019] [Indexed: 12/22/2022] Open
Abstract
Sickle cell disease (SCD) is an inherited red blood cell disorder caused by a structural abnormality of hemoglobin called sickle hemoglobin (HbS). Clinical manifestations of SCD are mainly characterized by chronic hemolysis and acute vaso-occlusive crisis, which are responsible for severe acute and chronic organ damage. SCD is widespread in sub-Saharan Africa, in the Middle East, Indian subcontinent, and some Mediterranean regions. With voluntary population migrations, people harboring the HbS gene have spread globally. In 2006, the World Health Organization recognized hemoglobinopathies, including SCD, as a global public health problem and urged national health systems worldwide to design and establish programs for the prevention and management of SCD. Herein we describe the historical experience of the network of hemoglobinopathy centers and their approach to SCD in Italy, a country where hemoglobinopathies have a high prevalence and where SCD, associated with different genotypes including ß-thalassemia, is present in the native population.
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Affiliation(s)
- Giovanna Russo
- Oncoematologia Pediatrica, Azienda Policlinico-Vittorio Emanuele, Università di Catania, Via Santa Sofia 78, 95123, Catania, Italy.
| | - Lucia De Franceschi
- Dipartimento di Medicina, Sezione Medicina Interna, Università di Verona, Policlinico GB Rossi, AOUI, Verona, Italy
| | - Raffaella Colombatti
- Clinica di Oncoematologia Pediatrica, Dipartimento della Salute della Donna e del Bambino Azienda Ospedaliera, Università di Padova, Padova, Italy
| | - Paolo Rigano
- U.O.C Ematologia e Malattie Rare del Sangue e degli Organi Ematopoietici-P.O. Cervello Palermo, Palermo, Italy
| | - Silverio Perrotta
- Dipartimento della Donna, del Bambino e di Chirurgia Generale e Specialistica, Università̀ degli Studi della Campania "Luigi Vanvitelli", Napoli, Italy
| | - Vincenzo Voi
- Dipartimento di Scienze Cliniche e Biologiche, Università di Torino, Ospedale San Luigi Gonzaga, Orbassano, Italy
| | - Giovanni Palazzi
- Dipartimento Integrato Materno Infantile U. O. Complessa di Pediatria Università degli Studi di Modena e Reggio Emilia, Modena, Italy
| | - Carmelo Fidone
- Unità operativa semplice Studio Emoglobinopatie Simt, Ragusa, Italy
| | | | - Giovanna Graziadei
- UOC di Medicina Generale, Centro Malattie Rare Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Pad, Granelli, Milano, Italy
| | - Antonello Pietrangelo
- Dipartimento di Scienze Mediche e Chirurgiche Materno-Infantili e dell'Adulto, Università degli Studi di Modena e Reggio Emilia, Modena, Italy
| | - Valeria Pinto
- Centro della Microcitemia e delle Anemie Congenite, Ospedale Galliera, Via Volta 6, 16128, Genova, Italy
| | | | - Francesco Sorrentino
- U.O. Talassemici Centro Anemia Rare e Disturbi del metabolismo del Ferro ASL ROMA 2 Ospedale S Eugenio, Roma, Italy
| | - Donatella Venturelli
- Struttura Complessa di Immuno-trasfusionale Azienda Ospedaliero, Universitaria di Modena, Modena, Italy
| | - Maddalena Casale
- Dipartimento della Donna, del Bambino e di Chirurgia Generale e Specialistica, Università̀ degli Studi della Campania "Luigi Vanvitelli", Napoli, Italy
| | - Francesca Ferrara
- Dipartimento di Scienze Mediche e Chirurgiche Materno-Infantili e dell'Adulto, Università degli Studi di Modena e Reggio Emilia, Modena, Italy
| | - Laura Sainati
- Clinica di Oncoematologia Pediatrica, Dipartimento della Salute della Donna e del Bambino Azienda Ospedaliera, Università di Padova, Padova, Italy
| | - Maria Domenica Cappellini
- UOC di Medicina Generale, Centro Malattie Rare Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Pad, Granelli, Milano, Italy
| | - Antonio Piga
- Struttura Complessa di Pediatria-Microcitemie dell'Ospedale San Luigi di Orbassano, Orbassano, TO, Italy
| | - Aurelio Maggio
- U.O.C Ematologia e Malattie Rare del Sangue e degli Organi Ematopoietici-P.O. Cervello Palermo, Palermo, Italy
| | - Gian Luca Forni
- Centro della Microcitemia e delle Anemie Congenite, Ospedale Galliera, Via Volta 6, 16128, Genova, Italy.
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Houwing ME, de Pagter PJ, van Beers EJ, Biemond BJ, Rettenbacher E, Rijneveld AW, Schols EM, Philipsen JNJ, Tamminga RYJ, van Draat KF, Nur E, Cnossen MH. Sickle cell disease: Clinical presentation and management of a global health challenge. Blood Rev 2019; 37:100580. [PMID: 31128863 DOI: 10.1016/j.blre.2019.05.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 05/17/2019] [Accepted: 05/17/2019] [Indexed: 01/12/2023]
Abstract
Sickle cell disease is an autosomal recessive, multisystem disorder, characterised by chronic haemolytic anaemia, painful episodes of vaso-occlusion, progressive organ failure and a reduced life expectancy. Sickle cell disease is the most common monogenetic disease, with millions affected worldwide. In well-resourced countries, comprehensive care programs have increased life expectancy of sickle cell disease patients, with almost all infants surviving into adulthood. Therapeutic options for sickle cell disease patients are however, still scarce. Predictors of sickle cell disease severity and a better understanding of pathophysiology and (epi)genetic modifiers are warranted and could lead to more precise management and treatment. This review provides an extensive summary of the pathophysiology and management of sickle cell disease and encompasses the characteristics, complications and current and future treatment options of the disease.
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Affiliation(s)
- M E Houwing
- Department of Paediatric Haematology, Erasmus University Medical Center - Sophia Children's Hospital, Wytemaweg 80, 3015, CN, Rotterdam, the Netherlands.
| | - P J de Pagter
- Department of Paediatric Haematology, Erasmus University Medical Center - Sophia Children's Hospital, Wytemaweg 80, 3015, CN, Rotterdam, the Netherlands.
| | - E J van Beers
- Department of Internal Medicine and Dermatology, Van Creveldkliniek, University Medical Center Utrecht, Internal mail no C.01.412, 3508, GA, Utrecht, the Netherlands.
| | - B J Biemond
- Department of Internal Medicine and Clinical Haematology, Amsterdam University Medical Centers, Meibergdreef 9, 1105, AZ, Amsterdam, the Netherlands.
| | - E Rettenbacher
- Department of Paediatric Haematology, Radboud University Medical Center - Amalia Children's Hospital, Geert Grooteplein Zuid 10, 6500, HB, Nijmegen, the Netherlands.
| | - A W Rijneveld
- Department of Haematology, Erasmus University Medical Center, Wytemaweg 80, 3015, CN, Rotterdam, the Netherlands.
| | - E M Schols
- Department of Haematology, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6525, GA, Nijmegen, the Netherlands.
| | - J N J Philipsen
- Department of Cell Biology, Erasmus University Medical Center, Wytemaweg 80, 3015, CN, Rotterdam, the Netherlands.
| | - R Y J Tamminga
- Department of Paediatric Oncology and Haematology, University Medical Center Groningen - Beatrix Children's Hospital, Postbus 30001, 9700, RB, Groningen, the Netherlands..
| | - K Fijn van Draat
- Department of Paediatric Haematology, Amsterdam University Medical Centers - Emma Children's Hospital, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands; Department of Plasma Proteins, Sanquin Research, the Netherlands.
| | - E Nur
- Department of Internal Medicine and Clinical Haematology, Amsterdam University Medical Centers, Meibergdreef 9, 1105, AZ, Amsterdam, the Netherlands.
| | - M H Cnossen
- Department of Paediatric Haematology, Erasmus University Medical Center - Sophia Children's Hospital, Wytemaweg 80, 3015, CN, Rotterdam, the Netherlands.
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Silva-Pinto AC, Alencar de Queiroz MC, Antoniazzo Zamaro PJ, Arruda M, Pimentel dos Santos H. The Neonatal Screening Program in Brazil, Focus on Sickle Cell Disease (SCD). Int J Neonatal Screen 2019; 5:11. [PMID: 33072971 PMCID: PMC7510189 DOI: 10.3390/ijns5010011] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 01/23/2019] [Indexed: 11/23/2022] Open
Abstract
Since 2001, the Brazilian Ministry of Health has been coordinating a National Neonatal Screening Program (NNSP) that now covers all the 26 states and the Federal District of the Brazilian Republic and targets six diseases including sickle cell disease (SCD) and other hemoglobinopathies. In 2005, the program coverage reached 80% of the total live births. Since then, it has oscillated between 80% and 84% globally with disparities from one state to another (>95% in São Paulo State). The Ministry of Health has also published several Guidelines for clinical follow-up and treatment for the diseases comprised by the neonatal screening program. The main challenge was, and still is, to organize the public health network (SUS), from diagnosis and basic care to reference centers in order to provide comprehensive care for patients diagnosed by neonatal screening, especially for SCD patients. Considerable gains have already been achieved, including the implementation of a network within SUS and the addition of scientific and technological progress to treatment protocols. The goals for the care of SCD patients are the intensification of information provided to health care professionals and patients, measures to prevent complications, and care and health promotion, considering these patients in a global and integrated way, to reduce mortality and enhance their quality of life.
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Affiliation(s)
- Ana C. Silva-Pinto
- Policy of Integral Attention to People with Sickle Cell Disease (PIAPSCD), Technical Advisory Council for Sickle Cell Disease (TAC-SCD), CGSH/DAET/SAS, Ministry of Health, Asa Norte Brasília 70719-040, Brazil
- Regional Blood Center of Ribeirão Preto, HC-FMRP, University of Sao Paulo (USP), Campus Universitário, Ribeirão Preto 14049-900, Brazil
- Correspondence: ; Tel.: +55-162101-9300
| | - Maria Cândida Alencar de Queiroz
- Regional Blood Center of Ribeirão Preto, HC-FMRP, University of Sao Paulo (USP), Campus Universitário, Ribeirão Preto 14049-900, Brazil
| | | | - Miranete Arruda
- Policy of Integral Attention to People with Sickle Cell Disease (PIAPSCD), Technical Advisory Council for Sickle Cell Disease (TAC-SCD), CGSH/DAET/SAS, Ministry of Health, Asa Norte Brasília 70719-040, Brazil
- State Health Secretariat, State of Pernambuco, Recife 50751-530, Brazil
| | - Helena Pimentel dos Santos
- Policy of Integral Attention to People with Sickle Cell Disease (PIAPSCD), Technical Advisory Council for Sickle Cell Disease (TAC-SCD), CGSH/DAET/SAS, Ministry of Health, Asa Norte Brasília 70719-040, Brazil
- Newborn Screening Program, APAE-Salvador, Salvador 41830-141, Brazil
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Tshilolo L, Tomlinson G, Williams TN, Santos B, Olupot-Olupot P, Lane A, Aygun B, Stuber SE, Latham TS, McGann PT, Ware RE. Hydroxyurea for Children with Sickle Cell Anemia in Sub-Saharan Africa. N Engl J Med 2019; 380:121-131. [PMID: 30501550 PMCID: PMC6454575 DOI: 10.1056/nejmoa1813598] [Citation(s) in RCA: 174] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Hydroxyurea is an effective treatment for sickle cell anemia, but few studies have been conducted in sub-Saharan Africa, where the burden is greatest. Coexisting conditions such as malnutrition and malaria may affect the feasibility, safety, and benefits of hydroxyurea in low-resource settings. METHODS We enrolled children 1 to 10 years of age with sickle cell anemia in four sub-Saharan countries. Children received hydroxyurea at a dose of 15 to 20 mg per kilogram of body weight per day for 6 months, followed by dose escalation. The end points assessed feasibility (enrollment, retention, and adherence), safety (dose levels, toxic effects, and malaria), and benefits (laboratory variables, sickle cell-related events, transfusions, and survival). RESULTS A total of 635 children were fully enrolled; 606 children completed screening and began receiving hydroxyurea at a mean (±SD) dose of 17.5±1.8 mg per kilogram per day. The retention rate was 94.2% at 3 years of treatment. Hydroxyurea therapy led to significant increases in both the hemoglobin and fetal hemoglobin levels. Dose-limiting toxic events regarding laboratory variables occurred in 5.1% of the participants, which was below the protocol-specified threshold for safety. During the treatment phase, 20.6 dose-limiting toxic effects per 100 patient-years occurred, as compared with 20.7 events per 100 patient-years before treatment. As compared with the pretreatment period, the rates of clinical adverse events decreased with hydroxyurea use, including rates of vaso-occlusive pain (98.3 vs. 44.6 events per 100 patient-years; incidence rate ratio, 0.45; 95% confidence interval [CI], 0.37 to 0.56), nonmalaria infection (142.5 vs. 90.0 events per 100 patient-years; incidence rate ratio, 0.62; 95% CI, 0.53 to 0.72), malaria (46.9 vs. 22.9 events per 100 patient-years; incidence rate ratio, 0.49; 95% CI, 0.37 to 0.66), transfusion (43.3 vs. 14.2 events per 100 patient-years; incidence rate ratio, 0.33; 95% CI, 0.23 to 0.47), and death (3.6 vs. 1.1 deaths per 100 patient-years; incidence rate ratio, 0.30; 95% CI, 0.10 to 0.88). CONCLUSIONS Hydroxyurea treatment was feasible and safe in children with sickle cell anemia living in sub-Saharan Africa. Hydroxyurea use reduced the incidence of vaso-occlusive events, infections, malaria, transfusions, and death, which supports the need for wider access to treatment. (Funded by the National Heart, Lung, and Blood Institute and others; REACH ClinicalTrials.gov number, NCT01966731 .).
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Affiliation(s)
- Léon Tshilolo
- From Centre Hospitalier Monkole, Kinshasa, Democratic Republic of Congo (L.T.); the Department of Medicine, University Health Network and Mt. Sinai Hospital, and the University of Toronto, Toronto (G.T.); the Kenya Medical Research Institute (KEMRI)-Wellcome Trust Research Program, Kilifi, Kenya (T.N.W.); the Department of Medicine, Imperial College London, London (T.N.W.); Hospital Pediátrico David Bernardino, Luanda, Angola (B.S.); Mbale Clinical Research Institute and Mbale Regional Referral and Teaching Hospital-Busitema University, Mbale, Uganda (P.O.-O.); the Division of Hematology, Department of Pediatrics, Cincinnati Children's Hospital (A.L., S.E.S., T.S.L., P.T.M., R.E.W.), University of Cincinnati College of Medicine (A.L., P.T.M., R.E.W.), and the Global Health Center, Cincinnati Children's Hospital Medical Center (S.E.S., P.T.M., R.E.W.), Cincinnati; and Cohen Children's Medical Center, New Hyde Park, and the Zucker School of Medicine at Hofstra/Northwell, Hempstead - both in New York (B.A.)
| | - George Tomlinson
- From Centre Hospitalier Monkole, Kinshasa, Democratic Republic of Congo (L.T.); the Department of Medicine, University Health Network and Mt. Sinai Hospital, and the University of Toronto, Toronto (G.T.); the Kenya Medical Research Institute (KEMRI)-Wellcome Trust Research Program, Kilifi, Kenya (T.N.W.); the Department of Medicine, Imperial College London, London (T.N.W.); Hospital Pediátrico David Bernardino, Luanda, Angola (B.S.); Mbale Clinical Research Institute and Mbale Regional Referral and Teaching Hospital-Busitema University, Mbale, Uganda (P.O.-O.); the Division of Hematology, Department of Pediatrics, Cincinnati Children's Hospital (A.L., S.E.S., T.S.L., P.T.M., R.E.W.), University of Cincinnati College of Medicine (A.L., P.T.M., R.E.W.), and the Global Health Center, Cincinnati Children's Hospital Medical Center (S.E.S., P.T.M., R.E.W.), Cincinnati; and Cohen Children's Medical Center, New Hyde Park, and the Zucker School of Medicine at Hofstra/Northwell, Hempstead - both in New York (B.A.)
| | - Thomas N Williams
- From Centre Hospitalier Monkole, Kinshasa, Democratic Republic of Congo (L.T.); the Department of Medicine, University Health Network and Mt. Sinai Hospital, and the University of Toronto, Toronto (G.T.); the Kenya Medical Research Institute (KEMRI)-Wellcome Trust Research Program, Kilifi, Kenya (T.N.W.); the Department of Medicine, Imperial College London, London (T.N.W.); Hospital Pediátrico David Bernardino, Luanda, Angola (B.S.); Mbale Clinical Research Institute and Mbale Regional Referral and Teaching Hospital-Busitema University, Mbale, Uganda (P.O.-O.); the Division of Hematology, Department of Pediatrics, Cincinnati Children's Hospital (A.L., S.E.S., T.S.L., P.T.M., R.E.W.), University of Cincinnati College of Medicine (A.L., P.T.M., R.E.W.), and the Global Health Center, Cincinnati Children's Hospital Medical Center (S.E.S., P.T.M., R.E.W.), Cincinnati; and Cohen Children's Medical Center, New Hyde Park, and the Zucker School of Medicine at Hofstra/Northwell, Hempstead - both in New York (B.A.)
| | - Brígida Santos
- From Centre Hospitalier Monkole, Kinshasa, Democratic Republic of Congo (L.T.); the Department of Medicine, University Health Network and Mt. Sinai Hospital, and the University of Toronto, Toronto (G.T.); the Kenya Medical Research Institute (KEMRI)-Wellcome Trust Research Program, Kilifi, Kenya (T.N.W.); the Department of Medicine, Imperial College London, London (T.N.W.); Hospital Pediátrico David Bernardino, Luanda, Angola (B.S.); Mbale Clinical Research Institute and Mbale Regional Referral and Teaching Hospital-Busitema University, Mbale, Uganda (P.O.-O.); the Division of Hematology, Department of Pediatrics, Cincinnati Children's Hospital (A.L., S.E.S., T.S.L., P.T.M., R.E.W.), University of Cincinnati College of Medicine (A.L., P.T.M., R.E.W.), and the Global Health Center, Cincinnati Children's Hospital Medical Center (S.E.S., P.T.M., R.E.W.), Cincinnati; and Cohen Children's Medical Center, New Hyde Park, and the Zucker School of Medicine at Hofstra/Northwell, Hempstead - both in New York (B.A.)
| | - Peter Olupot-Olupot
- From Centre Hospitalier Monkole, Kinshasa, Democratic Republic of Congo (L.T.); the Department of Medicine, University Health Network and Mt. Sinai Hospital, and the University of Toronto, Toronto (G.T.); the Kenya Medical Research Institute (KEMRI)-Wellcome Trust Research Program, Kilifi, Kenya (T.N.W.); the Department of Medicine, Imperial College London, London (T.N.W.); Hospital Pediátrico David Bernardino, Luanda, Angola (B.S.); Mbale Clinical Research Institute and Mbale Regional Referral and Teaching Hospital-Busitema University, Mbale, Uganda (P.O.-O.); the Division of Hematology, Department of Pediatrics, Cincinnati Children's Hospital (A.L., S.E.S., T.S.L., P.T.M., R.E.W.), University of Cincinnati College of Medicine (A.L., P.T.M., R.E.W.), and the Global Health Center, Cincinnati Children's Hospital Medical Center (S.E.S., P.T.M., R.E.W.), Cincinnati; and Cohen Children's Medical Center, New Hyde Park, and the Zucker School of Medicine at Hofstra/Northwell, Hempstead - both in New York (B.A.)
| | - Adam Lane
- From Centre Hospitalier Monkole, Kinshasa, Democratic Republic of Congo (L.T.); the Department of Medicine, University Health Network and Mt. Sinai Hospital, and the University of Toronto, Toronto (G.T.); the Kenya Medical Research Institute (KEMRI)-Wellcome Trust Research Program, Kilifi, Kenya (T.N.W.); the Department of Medicine, Imperial College London, London (T.N.W.); Hospital Pediátrico David Bernardino, Luanda, Angola (B.S.); Mbale Clinical Research Institute and Mbale Regional Referral and Teaching Hospital-Busitema University, Mbale, Uganda (P.O.-O.); the Division of Hematology, Department of Pediatrics, Cincinnati Children's Hospital (A.L., S.E.S., T.S.L., P.T.M., R.E.W.), University of Cincinnati College of Medicine (A.L., P.T.M., R.E.W.), and the Global Health Center, Cincinnati Children's Hospital Medical Center (S.E.S., P.T.M., R.E.W.), Cincinnati; and Cohen Children's Medical Center, New Hyde Park, and the Zucker School of Medicine at Hofstra/Northwell, Hempstead - both in New York (B.A.)
| | - Banu Aygun
- From Centre Hospitalier Monkole, Kinshasa, Democratic Republic of Congo (L.T.); the Department of Medicine, University Health Network and Mt. Sinai Hospital, and the University of Toronto, Toronto (G.T.); the Kenya Medical Research Institute (KEMRI)-Wellcome Trust Research Program, Kilifi, Kenya (T.N.W.); the Department of Medicine, Imperial College London, London (T.N.W.); Hospital Pediátrico David Bernardino, Luanda, Angola (B.S.); Mbale Clinical Research Institute and Mbale Regional Referral and Teaching Hospital-Busitema University, Mbale, Uganda (P.O.-O.); the Division of Hematology, Department of Pediatrics, Cincinnati Children's Hospital (A.L., S.E.S., T.S.L., P.T.M., R.E.W.), University of Cincinnati College of Medicine (A.L., P.T.M., R.E.W.), and the Global Health Center, Cincinnati Children's Hospital Medical Center (S.E.S., P.T.M., R.E.W.), Cincinnati; and Cohen Children's Medical Center, New Hyde Park, and the Zucker School of Medicine at Hofstra/Northwell, Hempstead - both in New York (B.A.)
| | - Susan E Stuber
- From Centre Hospitalier Monkole, Kinshasa, Democratic Republic of Congo (L.T.); the Department of Medicine, University Health Network and Mt. Sinai Hospital, and the University of Toronto, Toronto (G.T.); the Kenya Medical Research Institute (KEMRI)-Wellcome Trust Research Program, Kilifi, Kenya (T.N.W.); the Department of Medicine, Imperial College London, London (T.N.W.); Hospital Pediátrico David Bernardino, Luanda, Angola (B.S.); Mbale Clinical Research Institute and Mbale Regional Referral and Teaching Hospital-Busitema University, Mbale, Uganda (P.O.-O.); the Division of Hematology, Department of Pediatrics, Cincinnati Children's Hospital (A.L., S.E.S., T.S.L., P.T.M., R.E.W.), University of Cincinnati College of Medicine (A.L., P.T.M., R.E.W.), and the Global Health Center, Cincinnati Children's Hospital Medical Center (S.E.S., P.T.M., R.E.W.), Cincinnati; and Cohen Children's Medical Center, New Hyde Park, and the Zucker School of Medicine at Hofstra/Northwell, Hempstead - both in New York (B.A.)
| | - Teresa S Latham
- From Centre Hospitalier Monkole, Kinshasa, Democratic Republic of Congo (L.T.); the Department of Medicine, University Health Network and Mt. Sinai Hospital, and the University of Toronto, Toronto (G.T.); the Kenya Medical Research Institute (KEMRI)-Wellcome Trust Research Program, Kilifi, Kenya (T.N.W.); the Department of Medicine, Imperial College London, London (T.N.W.); Hospital Pediátrico David Bernardino, Luanda, Angola (B.S.); Mbale Clinical Research Institute and Mbale Regional Referral and Teaching Hospital-Busitema University, Mbale, Uganda (P.O.-O.); the Division of Hematology, Department of Pediatrics, Cincinnati Children's Hospital (A.L., S.E.S., T.S.L., P.T.M., R.E.W.), University of Cincinnati College of Medicine (A.L., P.T.M., R.E.W.), and the Global Health Center, Cincinnati Children's Hospital Medical Center (S.E.S., P.T.M., R.E.W.), Cincinnati; and Cohen Children's Medical Center, New Hyde Park, and the Zucker School of Medicine at Hofstra/Northwell, Hempstead - both in New York (B.A.)
| | - Patrick T McGann
- From Centre Hospitalier Monkole, Kinshasa, Democratic Republic of Congo (L.T.); the Department of Medicine, University Health Network and Mt. Sinai Hospital, and the University of Toronto, Toronto (G.T.); the Kenya Medical Research Institute (KEMRI)-Wellcome Trust Research Program, Kilifi, Kenya (T.N.W.); the Department of Medicine, Imperial College London, London (T.N.W.); Hospital Pediátrico David Bernardino, Luanda, Angola (B.S.); Mbale Clinical Research Institute and Mbale Regional Referral and Teaching Hospital-Busitema University, Mbale, Uganda (P.O.-O.); the Division of Hematology, Department of Pediatrics, Cincinnati Children's Hospital (A.L., S.E.S., T.S.L., P.T.M., R.E.W.), University of Cincinnati College of Medicine (A.L., P.T.M., R.E.W.), and the Global Health Center, Cincinnati Children's Hospital Medical Center (S.E.S., P.T.M., R.E.W.), Cincinnati; and Cohen Children's Medical Center, New Hyde Park, and the Zucker School of Medicine at Hofstra/Northwell, Hempstead - both in New York (B.A.)
| | - Russell E Ware
- From Centre Hospitalier Monkole, Kinshasa, Democratic Republic of Congo (L.T.); the Department of Medicine, University Health Network and Mt. Sinai Hospital, and the University of Toronto, Toronto (G.T.); the Kenya Medical Research Institute (KEMRI)-Wellcome Trust Research Program, Kilifi, Kenya (T.N.W.); the Department of Medicine, Imperial College London, London (T.N.W.); Hospital Pediátrico David Bernardino, Luanda, Angola (B.S.); Mbale Clinical Research Institute and Mbale Regional Referral and Teaching Hospital-Busitema University, Mbale, Uganda (P.O.-O.); the Division of Hematology, Department of Pediatrics, Cincinnati Children's Hospital (A.L., S.E.S., T.S.L., P.T.M., R.E.W.), University of Cincinnati College of Medicine (A.L., P.T.M., R.E.W.), and the Global Health Center, Cincinnati Children's Hospital Medical Center (S.E.S., P.T.M., R.E.W.), Cincinnati; and Cohen Children's Medical Center, New Hyde Park, and the Zucker School of Medicine at Hofstra/Northwell, Hempstead - both in New York (B.A.)
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Chambers TM, Kahan S, Camanda JF, Scheurer M, Airewele GE. Intermittent or uneven daily administration of low-dose hydroxyurea is effective in treating children with sickle cell anemia in Angola. Pediatr Blood Cancer 2018; 65:e27365. [PMID: 30051651 DOI: 10.1002/pbc.27365] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 05/30/2018] [Accepted: 06/18/2018] [Indexed: 11/07/2022]
Abstract
BACKGROUND Although hydroxyurea is proven effective in treatment of sickle cell anemia (SCA) and is widely prescribed in high-income countries, due to questions about feasibility of treating large numbers of patients in resource-limited health systems, its use is limited in sub-Saharan Africa (SSA), where most children with SCA live. We assessed hematological response and toxicity of hydroxyurea treatment for SCA in Angola. METHODS Retrospective study of children with SCA (not selected for clinical severity) treated on a fixed dose of hydroxyurea for at least 6 months. Because only the 500 mg capsule was available, dose was averaged weekly. We evaluated toxicity events and magnitude of hydroxyurea-induced changes in blood counts and compared patients who received a uniform daily dose to those prescribed intermittent or uneven daily doses. RESULTS Only 13% of 303 patients received a uniform dose of hydroxyurea daily. Dose ranged from 16.5 to 22.8 mg/kg/day. Hydroxyurea increased HGB and mean cell volume values by 0.5 g/dL (P < 0.0001) and 8 fL (P < 0.0001), while ANC, PLT, and ARC decreased 1.1 × 109 /L (P < 0.0001), 34 × 109 /L (P = < 0.0001), and 19 × 109 /L (P = 0.0008), respectively. There were no differences in magnitude of hydroxyurea-induced changes between patients prescribed intermittent or uneven doses and uniform daily doses, or between those treated in the lower and higher dose quartiles. Hematological toxicity events were mild and reversible. CONCLUSION Intermittent or uneven daily dosing of hydroxyurea is as effective as fixed daily doses in treating SCA. This strategy may enable treatment of additional children with SCA in SSA.
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Affiliation(s)
- Tiffany M Chambers
- Department of Pediatrics-Section of Hematology and Oncology, Baylor College of Medicine, Houston, Texas
| | - Silvina Kahan
- Global Health Corps, Baylor College of Medicine, Houston, Texas
| | - Joao F Camanda
- Faculty of Medicine, Universidade 11 de Novembro, Cabinda, Angola
| | - Michael Scheurer
- Department of Pediatrics-Section of Hematology and Oncology, Baylor College of Medicine, Houston, Texas
| | - Gladstone E Airewele
- Department of Pediatrics-Section of Hematology and Oncology, Baylor College of Medicine, Houston, Texas
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50
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Haploidentical Bone Marrow Transplantation with Post-Transplantation Cyclophosphamide Plus Thiotepa Improves Donor Engraftment in Patients with Sickle Cell Anemia: Results of an International Learning Collaborative. Biol Blood Marrow Transplant 2018; 25:1197-1209. [PMID: 30500440 DOI: 10.1016/j.bbmt.2018.11.027] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 11/24/2018] [Indexed: 12/19/2022]
Abstract
Curative therapy for individuals with severe sickle cell disease (SCD) who lack an HLA-identical sibling donor has been frustratingly elusive. In with the goal of improving engraftment while minimizing transplantation-related morbidity, a multi-institutional learning collaborative was developed in the context of a Phase II clinical trial of nonmyeloablative, related HLA-haploidentical (haplo) bone marrow transplantation (BMT) with post-transplantation cyclophosphamide. All eligible participants had hemoglobin SS, and 89% (16 of 18) had an identifiable donor. The median patient age was 20.9 years (IQR, 12.1 to 26.0 years), and the most common indication for transplantation was overt stroke (in 69%; 11 of 16). In the first 3 patients, the conditioning regimen consisted of antithymocyte globulin, fludarabine, cyclophosphamide, and low-dose total body irradiation. Graft-versus-host disease (GVHD) prophylaxis included post-transplantation cyclophosphamide, mycophenolate mofetil, and sirolimus. Primary graft rejection occurred in 2 of the 3 patients (67%), which triggered the study-stopping rule. To reduce graft rejection risk, thiotepa was added to the conditioning regimen, and then 15 patients (including 2 with previous graft rejection) underwent haplo-BMT with this thiotepa-augmented conditioning regimen. At a median follow-up of 13.3 months (interquartile range [IQR], 3.8 to 23.1 months), 93% (14 of 15) had >95% stable donor engraftment at 6 months, with 100% overall survival. The median time to neutrophil engraftment (>500) was 22 days (IQR, 19 to 27 days), and that for platelet engraftment (>50 x 109/L) was 28 days (IQR, 27 days to not reached). Two patients had grade III-IV acute GVHD, 1 patient had mild chronic GVHD, and 86% of patients (6 of 7) were off immunosuppression therapy by 1-year post-transplantation. Our data suggest that haplo-BMT with post-transplantation cyclophosphamide and thiotepa improves donor engraftment without significantly increasing morbidity or mortality and could dramatically expand curative options for individuals with SCD.
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