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Rossi M, Belinga S, Tolo A, Diop S, Diagne I, Chelo D, Wamba G, Gonzalez JP, Abough'elie C, Traore Y, Deme-Ly I, Seck M, Diaw M, Gbonon V, Boidy K, Kamara I, Kitenge R, Jouven X, Tshilolo L, Diallo D, Ranque B. Determinants of the haemoglobin level in patients with sickle cell disease living in sub-Saharan Africa: Major impact of the country of residence and independent effects of leucocyte and platelet counts and haemolysis. Br J Haematol 2024; 205:664-673. [PMID: 38831605 DOI: 10.1111/bjh.19576] [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: 01/01/2024] [Accepted: 05/21/2024] [Indexed: 06/05/2024]
Abstract
The degree of anaemia in sickle cell disease (SCD) is a well-known contributor to morbidity and mortality. We aimed to explore the factors affecting haemoglobin (Hb) level in African SCD patients, considering haemolysis biomarkers (LDH and bilirubin level, and reticulocyte count), leucocyte and platelet counts and socio-demographic characteristics (gender, age group, country of residence and BMI). The research was part of the CADRE multinational cohort and involved 3699 SCD patients living in Mali, Senegal, Ivory Coast, Democratic Republic of Congo, Gabon and Cameroon: 2936 SS/Sβ0, 587 SC and 176 Sβ + patients with median Hb level of 8, 11.3 and 11.2 g/dL respectively (p < 0.001). In multivariate analysis conducted in 1394 SS/Sβ0 patients, living in Cameroon, female gender, lower BMI, higher haemolysis markers (especially LDH) and higher leucocyte and platelet counts were independently associated with lower Hb level (all p < 0.05). In 497 SC and 156 Sβ + patients, female gender (p < 0.001), lower BMI (p < 0.05) and higher platelet counts (p < 0.001) were independently associated with lower Hb level. Anaemia in African SCD patients is not only associated with haemolysis but also with the country of residence, lower BMI and leucocyte or platelet counts which might reflect inflammation related to infectious burden in the region.
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Affiliation(s)
- Marica Rossi
- UMR S970 Inserm, Université Paris Cité, Paris, France
| | - Suzanne Belinga
- Haematology Department, Centre Pasteur du Cameroun, Yaoundé, Cameroon
| | - Aissata Tolo
- Haematology Unit, CHU de Yopougon, Abidjan, Ivory Coast
| | - Saliou Diop
- Centre National de Transfusion Sanguine, Dakar, Senegal
| | - Ibrahima Diagne
- Pediatrics Unit, Hospital Albert Royer, CHU de Fann, Dakar, Senegal
| | - David Chelo
- Cardiology Unit, Fondation Mère Enfant Chantal Biya, Yaoundé, Cameroon
| | - Guillaume Wamba
- Pediatrics Unit, Centre Hospitalier d'Essos, Yaoundé, Cameroon
| | - Jean Paul Gonzalez
- International Centre for Medical Research in Franceville (CIRMF), Libreville, Gabon
| | - Cochise Abough'elie
- International Centre for Medical Research in Franceville (CIRMF), Libreville, Gabon
| | - Youssouf Traore
- Centre de Recherche et Lutte Contre la Drépanocytose, Bamako, Mali
| | - Indou Deme-Ly
- Pediatrics Unit, Hospital Albert Royer, CHU de Fann, Dakar, Senegal
| | - Moussa Seck
- Centre National de Transfusion Sanguine, Dakar, Senegal
| | - Mor Diaw
- Centre National de Transfusion Sanguine, Dakar, Senegal
- Laboratoire de Physiologie et Explorations Fonctionnelles, FMPO- UCAD, Dakar, Senegal
- IRL 3189, "Environnement, Santé, Sociétés" CNRS, UCAD, CNRST, USTTB, UGB, Dakar, Senegal
| | | | - Kouakou Boidy
- Haematology Unit, CHU de Yopougon, Abidjan, Ivory Coast
| | - Ismael Kamara
- Centre National de Transfusion Sanguine, Dakar, Senegal
| | | | - Xavier Jouven
- UMR S970 Inserm, Université Paris Cité, Paris, France
- Cardiology Department, hôpital Européen Georges Pompidou, Assistance Publique Des Hôpitaux de Paris, Paris, France
| | - Léon Tshilolo
- Centre Monkole, Kinshasa, Democratic Republic of Congo
| | - Dapa Diallo
- Centre de Recherche et Lutte Contre la Drépanocytose, Bamako, Mali
| | - Brigitte Ranque
- UMR S970 Inserm, Université Paris Cité, Paris, France
- Internal Medicine Depalrtment, hôpital Européen Georges Pompidou, Assistance Publique Des Hôpitaux de Paris, Paris, France
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Aljabry M, Sulimani S, Alotaibi G, Aljabri H, Alomary S, Aljabri O, Sallam M, Alsultan A. Prevalence and Regional Distribution of Beta-Hemoglobin Variants in Saudi Arabia: Insights from the National Premarital Screening Program". J Epidemiol Glob Health 2024:10.1007/s44197-024-00281-x. [PMID: 39073533 DOI: 10.1007/s44197-024-00281-x] [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: 07/03/2024] [Accepted: 07/23/2024] [Indexed: 07/30/2024] Open
Abstract
BACKGROUND Hemoglobinopathies are among the most prevalent inherited disorders globally, with carrier prevalence varying significantly across regions. In Saudi Arabia, high rates of consanguineous marriages amplify the risk of these disorders. AIM This study aims to assess the burden of hemoglobinopathies by evaluating the prevalence and regional distribution of beta-hemoglobin variants, including rare variants, among couples participating in the national premarital screening program. METHODS Data were collected from the premarital genetic screening program and entered into the SEHA platform, covering the 13 administrative regions of Saudi Arabia. Blood samples underwent various screening tests for infectious and genetic diseases. Hemoglobin electrophoresis samples were analyzed using capillary electrophoresis, High-Performance Liquid Chromatography (HPLC), or a combination of both methods. RESULTS From 2011 to 2018, 1,871,184 individuals were included in the study, with 49.8% male and 50.2% female. The average age was 30.2 years. Hemoglobin S (HbS) was identified in 88,431 individuals (4.7% of the tested population and 78.5% of abnormal screening results), primarily as a sickle cell trait. β-thalassemia was the second most common disorder, identified in 22,420 individuals (1.2% of the population and 19.9% of hemoglobin disorders). HbC and HbD were each detected in 0.04% of cases, while HbO-Arab was identified in 0.007% and HbG in 0.006%. Hemoglobin E and hemoglobin Lepore were found to be extremely rare. CONCLUSION The study demonstrates regional variation in the prevalence of hemoglobin genetic variants in Saudi Arabia. To effectively mitigate this risk, it is imperative to strengthen public education and awareness, particularly focusing on genetic screening and counseling.
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Affiliation(s)
- Mansour Aljabry
- Department of Pathology, College of Medicine, King Saud University Medical City King Saud University, Riyadh, Saudi Arabia.
| | - Suha Sulimani
- Premarital Program, Ministry of Health, Riyadh, Saudi Arabia
| | - Ghazi Alotaibi
- Division of Hematology/Oncology, Department of Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Hassan Aljabri
- Premarital Program Center, Madina region, Ministry of Health, Riyadh, Saudi Arabia
| | - Shaker Alomary
- Premarital Program, Ministry of Health, Riyadh, Saudi Arabia
| | - Omar Aljabri
- Laboratory Department, Cluster 3 Bin Riyadh Region, Ministry of Health, Riyadh, Saudi Arabia
| | - Maha Sallam
- Laboratory Department, Alahsa Cluster, Ministry of Health, Riyadh, Saudi Arabia
| | - Abdulrahman Alsultan
- Department of Pediatrics, College of Medicine, King Saud University, Riyadh, Saudi Arabia
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Aljabry M, Sulimani S, Alotaibi G, Aljabri H, Alomary S, Adam I, Aljabri O, Alzahrani MK, Alsultan A. Regional Prevalence of Hemoglobin C Across Saudi Arabia: An Epidemiological Survey. J Epidemiol Glob Health 2024; 14:298-303. [PMID: 38372896 PMCID: PMC11176108 DOI: 10.1007/s44197-024-00193-w] [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: 10/28/2023] [Accepted: 01/16/2024] [Indexed: 02/20/2024] Open
Abstract
INTRODUCTION HbC is a common structural hemoglobinopathy especially in West Africa. Prevalence and regional distribution of HbC in Saudi Arabia are widely undocumented. Patients with homozygous HbC disease may have mild hemolytic anemia whereas combination with hemoglobin S (HbS) leads to a clinically severe phenotype. AIM The current epidemiological study, considered the largest from Saudi Arabia, aimed to evaluate the regional prevalence of the HbC variant among the couples participating in the premarital screening program from 2011 to 2018. METHODS Data from the PMSGC program were obtained for premarital screening and genetic counseling. The collected data were then entered into the SEHA platform, a centralized electronic repository for the 13 designated regions in Saudi Arabia. Hemoglobin electrophoresis samples are analyzed using either HPLC, capillary electrophoresis, or a combination of both methods to confirm the presence of abnormal hemoglobin bands. RESULTS This study included 1,871,184 individuals from 2011 to 2018. Of those, 49.8% were males and 50.2% were females. 112,618 (6.0%) had an abnormal test. Total number of Hb C cases were 778 (0.04%). HbC trait (HbAC) was detected in 764 participants while homozygous HbC (HbCC) and combined heterozygous (HbSC) were found in 9 and 5 cases, respectively. The regions near the Red Sea have higher rates than the central and eastern regions. CONCLUSION HbC is a rare variant in Saudi Arabia with varying regional frequencies. HbC variant is more common in Mecca and Madina regions. The geographic area of HbC distribution differs from the areas with high prevalence of HbS, which explains why HbSC disease cases are overwhelmingly rare.
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Affiliation(s)
- Mansour Aljabry
- Pathology Department, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
| | - Suha Sulimani
- Premarital Program, Ministry of Health, Riyadh, Saudi Arabia
| | - Ghazi Alotaibi
- Department of Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Hassan Aljabri
- Premarital Program, Ministry of Health, Riyadh, Saudi Arabia
| | - Shaker Alomary
- Premarital Program, Ministry of Health, Riyadh, Saudi Arabia
| | - Izzeldin Adam
- Premarital Program, Ministry of Health, Riyadh, Saudi Arabia
| | - Omar Aljabri
- Laboratory Department, Cluster 3 in Riyadh Region, Ministry of Health, Riyadh, Saudi Arabia
| | | | - Abdulrahman Alsultan
- Department of Pediatrics, College of Medicine, King Saud University, Riyadh, Saudi Arabia
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Damena D, Barry A, Morrison R, Gaoussou S, Mahamar A, Attaher O, Issiaka D, Dicko Y, Dicko A, Duffy P, Fried M. A novel locus in CSMD1 gene is associated with increased susceptibility to severe malaria in Malian children. Front Genet 2024; 15:1390786. [PMID: 38854427 PMCID: PMC11157005 DOI: 10.3389/fgene.2024.1390786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 05/02/2024] [Indexed: 06/11/2024] Open
Abstract
Background Plasmodium falciparum malaria is still a leading cause of child mortality in sub-Saharan Africa. The clinical manifestations of malaria range from asymptomatic infection to severe disease. The variation in clinical presentation is partly attributed to host genetic factors with estimated narrow-sense heritability of 23%. Here, we investigate the associations between candidate gene polymorphisms and the likelihood of severe malaria (SM) in a cohort of Malian children. Methods Based on our previous genome-wide association studies (GWAS) analysis, candidate genes were selected for in-depth analysis using several criteria including gene-level GWAS scores, functional overlap with malaria pathogenesis, and evidence of association with protection or susceptibility to other infectious or inflammatory diseases. Single Nucleotide Polymorphisms (SNPs) residing within these genes were selected mainly based on p-values from previous severe malaria susceptibility GWAS studies and minor allele frequency (MAF) in West African populations. Results Of 182 candidate genes reported in our previous study, 11 genes and 22 SNPs residing in these genes were selected. The selected SNPs were genotyped using KASP technology in 477 DNA samples (87 SM and 390 controls). Logistic regression analysis revealed that a common intron variant, rs13340578 in CUB and Sushi Multi Domain (CSMD1) gene, is associated with increased odds of SM in recessive mode of inheritance (MAF = 0.42, OR = 1.8, 95% CI = [1.78, 1.84], p = 0.029). The SNP is in linkage disequilibrium (LD) with multiple variants with regulatory features. Conclusion Taken together, the current study showed that an intron variant rs13340578, residing in CSMD1 gene, is associated with increased susceptibility to malaria. This finding suggests that modified regulation of complement may contribute to malaria disease severity. Further studies are needed to identify the causal variants and the underlying molecular mechanisms.
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Affiliation(s)
- Delesa Damena
- Molecular Pathogenesis and Biomarkers Section, Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Amadou Barry
- Malaria Research and Training Center, University of Sciences Techniques and Technologies of Bamako, Bamako, Mali
| | - Robert Morrison
- Pathogenesis and Immunity Section, Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Santara Gaoussou
- Malaria Research and Training Center, University of Sciences Techniques and Technologies of Bamako, Bamako, Mali
| | - Almahamoudou Mahamar
- Malaria Research and Training Center, University of Sciences Techniques and Technologies of Bamako, Bamako, Mali
| | - Oumar Attaher
- Malaria Research and Training Center, University of Sciences Techniques and Technologies of Bamako, Bamako, Mali
| | - Djibrilla Issiaka
- Malaria Research and Training Center, University of Sciences Techniques and Technologies of Bamako, Bamako, Mali
| | - Yahia Dicko
- Malaria Research and Training Center, University of Sciences Techniques and Technologies of Bamako, Bamako, Mali
| | - Alassane Dicko
- Malaria Research and Training Center, University of Sciences Techniques and Technologies of Bamako, Bamako, Mali
| | - Patrick Duffy
- Pathogenesis and Immunity Section, Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Michal Fried
- Molecular Pathogenesis and Biomarkers Section, Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, United States
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Tepakhan W, Kanjanaopas S, Sreworadechpisal K, Penglong T, Sripornsawan P, Wangchauy C, Nokkong C, Kongkan C, Buathong S. Molecular epidemiology and hematological profiles of hemoglobin variants in southern Thailand. Sci Rep 2024; 14:9255. [PMID: 38649425 PMCID: PMC11035545 DOI: 10.1038/s41598-024-59987-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 04/17/2024] [Indexed: 04/25/2024] Open
Abstract
Data on hemoglobin (Hb) variants in southern Thailand are lacking. This study aimed to reassess the frequency of Hb variants and the clinical aspects of compound heterozygous Hb variant with other hemoglobinopathies. We enrolled 13,391 participants from ten provinces in southern Thailand during 2015-2022. Hb analysis was performed using capillary electrophoresis, and mutations in the HBA and HBB genes were identified using PCR or DNA sequencing. Hb variants were identified in 337 (2.5%) unrelated subjects. Nine β-chain variants, namely Hb Malay (76.9%), Hb C (10.1%), Hb D-Punjab (2.9%), Hb G-Makassar (2.3%), Hb Dhonburi (2.3%), Hb Tak (1.4%), Hb J-Bangkok (1.4%), Hb New York (0.3%), and Hb Hope (0.3%), and four α-chain variants-Hb G-Georgia (HBA1) (0.9%), Hb G-Georgia (HBA2) (0.3%), Hb Q-Thailand (0.6%), and Hb St. Luke's-Thailand (0.3%)-were identified. The southern population exhibited a distinct spectrum of Hb variants compared to that observed in the populations from other areas. Several compound heterozygous genotypes were also identified. Combining Hb Malay with Hb E or high Hb F determinants did not require a blood transfusion. This study provides essential information for genetic counseling in thalassemia prevention and control programs in this region.
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Affiliation(s)
- Wanicha Tepakhan
- Department of Pathology, Faculty of Medicine, Prince of Songkla University, Songkhla, 90110, Thailand.
| | - Sataron Kanjanaopas
- Department of Pathology, Faculty of Medicine, Prince of Songkla University, Songkhla, 90110, Thailand
| | - Korntip Sreworadechpisal
- Department of Pathology, Faculty of Medicine, Prince of Songkla University, Songkhla, 90110, Thailand
| | - Tipparat Penglong
- Department of Pathology, Faculty of Medicine, Prince of Songkla University, Songkhla, 90110, Thailand
| | - Pornpun Sripornsawan
- Department of Pediatrics, Faculty of Medicine, Prince of Songkla University, Songkhla, 90110, Thailand
| | - Chaowanee Wangchauy
- Department of Pathology, Faculty of Medicine, Prince of Songkla University, Songkhla, 90110, Thailand
| | - Chadaporn Nokkong
- Department of Pathology, Faculty of Medicine, Prince of Songkla University, Songkhla, 90110, Thailand
| | - Chulalak Kongkan
- Department of Pathology, Faculty of Medicine, Prince of Songkla University, Songkhla, 90110, Thailand
| | - Saristha Buathong
- Department of Pathology, Faculty of Medicine, Prince of Songkla University, Songkhla, 90110, Thailand
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Jacobs JW, Sharma D, Stephens LD, Figueroa Villalba CA, Rinder HM, Woo JS, Wheeler AP, Gerberi D, Goel R, Tormey CA, Booth GS, Bloch EM, Adkins BD. Thrombosis risk with haemoglobin C trait and haemoglobin C disease: A systematic review. Br J Haematol 2024; 204:1500-1506. [PMID: 38291731 DOI: 10.1111/bjh.19313] [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: 12/04/2023] [Revised: 01/02/2024] [Accepted: 01/11/2024] [Indexed: 02/01/2024]
Abstract
The thrombotic risk with haemoglobin C trait (HbAC) or haemoglobin C disease (HbCC) is unclear. However, individuals with HbCC have demonstrated chronic haemolysis, higher blood viscosity and altered rheology when compared to individuals with wild-type haemoglobin (HbAA). These physiological alterations may theoretically translate to increased risk of thrombosis; therefore, a systematic literature review was performed to investigate the possible association between HbAC and/or HbCC and thrombosis. Twenty-two studies met inclusion criteria representing 782 individuals with HbAC (n = 694) or HbCC (n = 88). Fifteen studies described the presence/absence of venous thromboembolism (VTE) in patients with HbAC (n = 685) or HbCC (n = 79), while seven studies described patients with HbAC (n = 9) or HbCC (n = 9) and arterial thrombosis. Most (n = 20) studies were case reports or case series; however, two studies suggested a potential increased VTE risk with HbAC compared to HbAA in (i) all patients (OR 2.2, 95% CI: 0.9-5.5) and in (ii) pregnant individuals (RR 3.7, 95% CI 0.9-16). This review is the largest assessment of patients with HbC trait or disease and thrombosis to date; despite its limitations, the findings suggest HbC may be a predisposing risk factor to thrombosis. Prospective cohort studies are warranted to definitively elucidate the risk of thrombosis in this population.
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Affiliation(s)
- Jeremy W Jacobs
- Special Coagulation Laboratory, Division of Hematopathology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA
| | - Deva Sharma
- Division of Transfusion Medicine, Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Division of Hematology/Oncology, Department of Medicine, Vanderbilt-Meharry Center for Excellence in Sickle Cell Disease, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Laura D Stephens
- Department of Pathology, University of California San Diego, La Jolla, California, USA
| | | | - Henry M Rinder
- Department of Laboratory Medicine, Yale School of Medicine, New Haven, Connecticut, USA
- Department of Hematology, Yale School of Medicine, New Haven, Connecticut, USA
| | - Jennifer S Woo
- Department of Pathology, City of Hope National Medical Center, Irvine, California, USA
| | - Allison P Wheeler
- Division of Coagulation Medicine, Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Division of Hematology/Oncology, Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Dana Gerberi
- Mayo Clinic Libraries, Mayo Clinic, Rochester, Minnesota, USA
| | - Ruchika Goel
- Department of Internal Medicine, Simmons Cancer Institute, Southern Illinois University School of Medicine, Springfield, Illinois, USA
- Vitalant, Corporate Medical Affairs, Scottsdale, Arizona, USA
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Christopher A Tormey
- Department of Laboratory Medicine, Yale School of Medicine, New Haven, Connecticut, USA
| | - Garrett S Booth
- Division of Transfusion Medicine, Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Evan M Bloch
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Brian D Adkins
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
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Ahmad A, Fattoum K, Imam W, Mukhalalaty MY, Murad M, Al Quobaili FA. Hemoglobin C Disorder in Anemic Patients Referred to the National Center for Thalassemia and Genetic Counseling in Damascus. Int J Hematol Oncol Stem Cell Res 2024; 18:183-191. [PMID: 38868813 PMCID: PMC11166489 DOI: 10.18502/ijhoscr.v18i2.15376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 09/20/2023] [Indexed: 06/14/2024] Open
Abstract
Background: Hemoglobinopathies are common inherited blood disorders in our Mediterranean area. The main structural hemoglobin variants are hemoglobin S and hemoglobin C, due to their prevalence. We conducted this retrospective study to investigate and characterize hemoglobin C patients referred to the National Center for Thalassemia and Genetic Counseling and the management of hemoglobin C disease in Damascus. Materials and Methods: The study included patients referred to the National Center for Thalassemia and Genetic Counseling in Damascus between 2000 and 2022 for hemoglobin C detection. Gender, age, geographical origin, hemoglobin electrophoresis profile, and blood transfusion were considered for hemoglobin C patient classification. Blood transfusion in five consecutive years and linear regression with hemoglobin S and C values were determined. Results: 30 (14 males and 16 females) out of 624 patients between 3 and 46 years old (mean ± SD: 17.3 ± 9.7 years) showed hemoglobin C disease. Only eight patients (one male and seven females) received blood transfusions, and the remaining patients (13 males and 9 females) did not receive any transfusion. Only one patient with 100% hemoglobin C was detected; 19 showed HbSC, and 10 had HbAC. There was a significant correlation between hemoglobin S and geographical origin (P-value=0). Conclusion: A Homozygote hemoglobin C patient has mild hemolytic anemia, whereas the hemoglobin C 100% patient has only a one-time blood transfusion (he was 17 years old) in our study. The inherited combination of hemoglobin C and S is less severe than hemoglobin S alone. There is a significant relationship between hemoglobin S and geographical origin (p-value=0).
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Affiliation(s)
- Aya Ahmad
- Department of Pharmacy, Al-Sham Private University, AL-Tall Damascus, Syria
| | - Karam Fattoum
- Department of Pharmacy, Al-Sham Private University, AL-Tall Damascus, Syria
| | - Wael Imam
- Department of Pharmacy, Al-Sham Private University, AL-Tall Damascus, Syria
| | | | - Musab Murad
- Department of Pharmacy, Al-Sham Private University, AL-Tall Damascus, Syria
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Queiroz G, Monteiro C, Manco L, Relvas L, Trovoada MDJ, Leite A, Bento C. Sickle cell trait in São Tomé e Príncipe: a population-based prevalence study in women of reproductive age. BMC Public Health 2024; 24:850. [PMID: 38504224 PMCID: PMC10949760 DOI: 10.1186/s12889-024-17761-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 01/12/2024] [Indexed: 03/21/2024] Open
Abstract
BACKGROUND Sickle Cell Disorder is Africa's most prevalent genetic disease. Yet, it remains a neglected condition, with high mortality under-five, and a lack of population-based studies in the region. This is the first of its kind in São Tomé e Príncipe, aiming to estimate the prevalence of sickle cell trait and other haemoglobin variants in women of reproductive age and its associated factors. METHODS We conducted a cluster survey in 35 neighbourhoods. Haemoglobin was assessed through point-of-care capillary electrophoresis or high-performance liquid chromatography, and sociodemographic data through questionnaires. The weighted prevalence of sickle cell trait (HbAS) and HbC carriers was estimated with a 95% confidence interval (95% CI). We calculated weighted prevalence ratios (95% CI) through robust Poisson regression for its association with age and individual and collective genetic heritage. FINDINGS The prevalence of sickle cell trait in women of reproductive age in São Tomé e Príncipe (n = 376) was 13.45% (95% CI: 9.05-19.00). The prevalence of HbC carriers was 8.00% (95% CI: 4.71-12.00). Older age and speaking Forro or Angolar were positively associated with having sickle cell trait. INTERPRETATION The prevalence of sickle cell trait in São Tomé e Príncipe ranks high in the West African region. The country should follow international guidelines, implementing newborn screening and comprehensive healthcare management.
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Affiliation(s)
- Guilherme Queiroz
- Centro de Investigação em Antropologia e Saúde (CIAS), Universidade de Coimbra, Coimbra, Portugal.
- NOVA National School of Public Health, Public Health Research Centre, Comprehensive Health Research Center, CHRC, NOVA University Lisbon, Av. Padre Cruz, Lisboa, 1600 - 560, Portugal.
- Unidade de Saúde Pública, Unidade Local de Saúde da Região de Aveiro, Aveiro, Portugal.
| | | | - Licínio Manco
- Centro de Investigação em Antropologia e Saúde (CIAS), Universidade de Coimbra, Coimbra, Portugal
- Departamento de Ciências da Vida, Universidade de Coimbra, Coimbra, Portugal
| | - Luís Relvas
- Unidade Funcional Hematologia Molecular, Unidade Local de Saúde de Coimbra, Coimbra, Portugal
| | | | - Andreia Leite
- NOVA National School of Public Health, Public Health Research Centre, Comprehensive Health Research Center, CHRC, NOVA University Lisbon, Av. Padre Cruz, Lisboa, 1600 - 560, Portugal
- Department of Epidemiology, Instituto Nacional de Saúde Doutor Ricardo Jorge (INSA), Lisbon, Portugal
| | - Celeste Bento
- Centro de Investigação em Antropologia e Saúde (CIAS), Universidade de Coimbra, Coimbra, Portugal
- Unidade Funcional Hematologia Molecular, Unidade Local de Saúde de Coimbra, Coimbra, Portugal
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Gatete JDD, Worthy CC, Jagannathan R, DuBose CW, Sacks DB, Sumner AE. Fructosamine is Not a Reliable Test for the Detection of Hyperglycemia: Insight from the Africans in America Study. Diabetes Metab Syndr Obes 2023; 16:2689-2693. [PMID: 37693326 PMCID: PMC10492550 DOI: 10.2147/dmso.s426406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 08/24/2023] [Indexed: 09/12/2023] Open
Abstract
Objective To improve detection of abnormal glucose tolerance (Abnl-GT), attention has moved beyond the oral glucose tolerance test (OGTT), to non-fasting markers of glycemia, specifically, HbA1c, fructosamine (FA) and glycated albumin (GA). Emerging data suggest that in African descent populations, the combination of HbA1c and GA is superior to the combination of HbA1c and FA. However, the diagnosis of Abnl-GT is usually based on tests which are performed only once. As reproducibility of Abnl-GT diagnosis by HbA1c, fructosamine (FA) and glycated albumin (GA) is unknown, reproducibility of Abnl-GT diagnosis by HbA1c, FA and GA were assessed in 209 African-born Blacks living in America. Methods At Visits 1 and 2 (9 ± 4 days apart), samples were obtained for HbA1c, FA and GA levels. Glucose tolerance status was determined at Visit 1 by OGTT. Reproducibility was based on the К-statistic and paired t-tests. Thresholds for the diagnosis of Abnl-GT by FA and GA which corresponded to an HbA1c of 5.7% were 235umol/L and 14.6%, respectively. Results Abnl-GT occurred in 38% (80/209). Diagnostic reproducibility was excellent for HbA1c (К≥0.86) and GA (К≥0.89), but only moderate for FA (К=0.59). Neither HbA1c nor GA levels varied between visits (both P≥0.3). In contrast, FA was significantly lower at Visit 2 than Visit 1(P<0.01). Conclusion As HbA1c and GA provided similar diagnostic results on different days and FA did not, HbA1C and GA are superior to FA in both clinical care settings and epidemiologic studies.
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Affiliation(s)
- Jean de Dieu Gatete
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
- Institute of Global Health Equity, University of Global Health Equity, Kigali, Rwanda
| | - Charlita C Worthy
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Ram Jagannathan
- Emory Global Diabetes Research Center of Woodruff Health Sciences Center and Emory University, Rollins School of Public Health of Emory University, Atlanta, GA, USA
| | - Christopher W DuBose
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
| | - David B Sacks
- Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Anne E Sumner
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, USA
- Hypertension in Africa Research Team, North-West University, Potchefstroom, North-West, South Africa
- National Institute of Minority Health and Health Disparities, Bethesda, MD, USA
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10
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梁 利, 何 訸, 孙 婉, 李 友, 张 玫. [Hemoglobin C Variant Affecting Glycated Hemoglobin Test Results: A Rare Case Report]. SICHUAN DA XUE XUE BAO. YI XUE BAN = JOURNAL OF SICHUAN UNIVERSITY. MEDICAL SCIENCE EDITION 2023; 54:659-662. [PMID: 37248601 PMCID: PMC10475414 DOI: 10.12182/20230560209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Indexed: 05/31/2023]
Abstract
Hemoglobin (Hb) variants are common factors that affect the results of glycosylated hemoglobin (A1C) tests. Hemoglobin variants react differently to different testing methods. Herein, we presented the first ever report of the effect of hemoglobin C (Hb C) on the test results of A1C in the Chinese population. High performance liquid chromatography (HPLC) and capillary electrophoresis were performed to measure A1C. Hemoglobin electrophoresis was conducted to identify the hemoglobin variants. Hb sequencing was performed to determine the mutation sites on the β chain. HPLC showed decreased A1C results, which could be corrected by electrophoresis, but the electrophoresis graph still showed abnormal peaks. The hemoglobin electrophoresis results suggested that there were hemoglobin variants, which hemoglobin sequencing results revealed to be Hb C. Uncommon variations in a specific population tend to be overlooked. To avoid clinical decision-making being affected by the results of a single test, we recommend that an explanatory reporting model be routinely adopted for A1C tests so that all reports always contain explanatory notes for the testing methodology and analysis of the graphs.
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Affiliation(s)
- 利波 梁
- 四川大学华西医院 全科医学中心 (成都 610041)General Practice Medical Center/International Medical Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 訸 何
- 四川大学华西医院 全科医学中心 (成都 610041)General Practice Medical Center/International Medical Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 婉婷 孙
- 四川大学华西医院 全科医学中心 (成都 610041)General Practice Medical Center/International Medical Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 友琼 李
- 四川大学华西医院 全科医学中心 (成都 610041)General Practice Medical Center/International Medical Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - 玫 张
- 四川大学华西医院 全科医学中心 (成都 610041)General Practice Medical Center/International Medical Center, West China Hospital, Sichuan University, Chengdu 610041, China
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11
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Ancestry, diversity, and genetics of health-related traits in African-derived communities (quilombos) from Brazil. Funct Integr Genomics 2023; 23:74. [PMID: 36867305 PMCID: PMC9982798 DOI: 10.1007/s10142-023-00999-0] [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: 12/27/2022] [Revised: 02/22/2023] [Accepted: 02/23/2023] [Indexed: 03/04/2023]
Abstract
Brazilian quilombos are communities formed by enslaved Africans and their descendants all over the country during slavery and shortly after its abolition. Quilombos harbor a great fraction of the largely unknown genetic diversity of the African diaspora in Brazil. Thus, genetic studies in quilombos have the potential to provide important insights not only into the African roots of the Brazilian population but also into the genetic bases of complex traits and human adaptation to diverse environments. This review summarizes the main results of genetic studies performed on quilombos so far. Here, we analyzed the patterns of African, Amerindian, European, and subcontinental ancestry (within Africa) of quilombos from the five different geographic regions of Brazil. In addition, uniparental markers (from the mtDNA and the Y chromosome) studies are analyzed together to reveal demographic processes and sex-biased admixture that occurred during the formation of these unique populations. Lastly, the prevalence of known malaria-adaptive African mutations and other African-specific variants discovered in quilombos, as well as the genetic bases of health-related traits, are discussed here, together with their implication for the health of populations of African descent.
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12
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A high-throughput newborn screening approach for SCID, SMA, and SCD combining multiplex qPCR and tandem mass spectrometry. PLoS One 2023; 18:e0283024. [PMID: 36897914 PMCID: PMC10004496 DOI: 10.1371/journal.pone.0283024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 02/28/2023] [Indexed: 03/11/2023] Open
Abstract
Early diagnosis of severe combined immunodeficiency (SCID), spinal muscular atrophy (SMA), and sickle cell disease (SCD) improves health outcomes by providing a specific treatment before the onset of symptoms. A high-throughput nucleic acid-based method in newborn screening (NBS) has been shown to be fast and cost-effective in the early detection of these diseases. Screening for SCD has been included in Germany's NBS Program since Fall 2021 and typically requires high-throughput NBS laboratories to adopt analytical platforms that are demanding in terms of instrumentation and personnel. Thus, we developed a combined approach applying a multiplexed quantitative real-time PCR (qPCR) assay for simultaneous SCID, SMA, and 1st-tier SCD screening, followed by a tandem mass spectrometry (MS/MS) assay for 2nd-tier SCD screening. DNA is extracted from a 3.2-mm dried blood spot from which we simultaneously quantify T-cell receptor excision circles for SCID screening, identify the homozygous SMN1 exon 7 deletion for SMA screening, and determine the integrity of the DNA extraction through the quantification of a housekeeping gene. In our two-tier SCD screening strategy, our multiplex qPCR identifies samples carrying the HBB: c.20A>T allele that is coding for sickle cell hemoglobin (HbS). Subsequently, the 2nd tier MS/MS assay is used to distinguish heterozygous HbS/A carriers from samples of patients with homozygous or compound heterozygous SCD. Between July 2021 and March 2022, 96,015 samples were screened by applying the newly implemented assay. The screening revealed two positive SCID cases, while 14 newborns with SMA were detected. Concurrently, the qPCR assay registered HbS in 431 samples which were submitted to 2nd-tier SCD screening, resulting in 17 HbS/S, five HbS/C, and two HbS/β thalassemia patients. The results of our quadruplex qPCR assay demonstrate a cost-effective and fast approach for a combined screening of three diseases that benefit from nucleic-acid based methods in high-throughput NBS laboratories.
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13
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Minniti C, Brugnara C, Steinberg MH. HbSC disease: A time for progress. Am J Hematol 2022; 97:1390-1393. [PMID: 36073655 DOI: 10.1002/ajh.26702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 08/23/2022] [Indexed: 01/28/2023]
Affiliation(s)
- Caterina Minniti
- Division of Hematology, Department of Medicine, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, New York, USA
| | - Carlo Brugnara
- Department of Laboratory Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.,Department of Pathology, Harvard Medical School, Boston, Massachusetts, USA
| | - Martin H Steinberg
- Division of Hematology and Medical Oncology, Department of Medicine, Center of Excellence for Sickle Cell Disease, Boston University School of Medicine and Boston Medical Center, Boston, Massachusetts, USA
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14
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Thiam F, Diop G, Coulonges C, Derbois C, Mbengue B, Thiam A, Nguer CM, Zagury JF, Deleuze JF, Dieye A. G6PD and HBB polymorphisms in the Senegalese population: prevalence, correlation with clinical malaria. PeerJ 2022; 10:e13487. [PMID: 35811813 PMCID: PMC9266585 DOI: 10.7717/peerj.13487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 05/03/2022] [Indexed: 01/24/2023] Open
Abstract
Background Host genetic factors contribute to the variability of malaria phenotypes and can allow a better understanding of mechanisms involved in susceptibility and/or resistance to Plasmodium falciparum infection outcomes. Several genetic polymorphisms were reported to be prevalent among populations living in tropical malaria-endemic regions and induce protection against malaria. The present study aims to investigate the prevalence of HBB (chr11) and G6PD (chrX) deficiencies polymorphisms among Senegalese populations and their associations with the risk for severe Plasmodium falciparum malaria occurrence. Methods We performed a retrospective study with 437 samples, 323 patients recruited in hospitals located in three different endemic areas where malaria episodes were confirmed and 114 free malaria controls. The patients enrolled were classified into two groups: severe malaria (SM) (153 patients) and uncomplicated malaria (UM) (170 patients). PCR and DNA sequencing assessed host genetic polymorphisms in HBB and G6PD. Using a multivariate regression and additive model, estimates of the impact of human HBB and G6PD polymorphisms on malaria incidence were performed. Results Six frequent SNPs with minor allele frequencies (MAF) > 3% were detected in the HBB gene (rs7946748, rs7480526, rs10768683, rs35209591, HbS (rs334) and rs713040) and two in the G6PD gene (rs762515 and rs1050828 (G6PD-202 G > A). Analysis of selected HbS polymorphism showed significant association with protective effect against severe malaria with a significant p-value = 0.033 (OR 0.38, 95% CI [0.16-0.91]) for SM vs. UM comparison. Surprisingly, our study did not identify the protective effect of variant HbC polymorphism against severe malaria. Finally, we found some of the polymorphisms, like HbS (rs334), are associated with age and biological parameters like eosinophils, basophils, lymphocytes etc. Conclusion Our data report HBB and G6PD polymorphisms in the Senegalese population and their correlation with severe/mild malaria and outcome. The G6PD and HBB deficiencies are widespread in West Africa endemic malaria regions such as The Gambia, Mali, and Burkina Faso. The study shows the critical role of genetic factors in malaria outcomes. Indeed, genetic markers could be good tools for malaria endemicity prognosis.
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Affiliation(s)
- Fatou Thiam
- Groupe de Recherche Biotechnologie Appliquée et Bioprocédés Environnementaux (GRBA-BE), Laboratoire Eau, Energie, Environnement et Procédés Industriels (LE3PI), Département de Génie Chimique et Biologie Appliquée, Ecole Supérieure Polytechnique, Université Cheikh Anta DIOP de Dakar, Dakar Fann, Dakar, Sénégal
| | - Gora Diop
- Unité Postulante de Biologie Génétique, Génomique et Bio-informatique (G2B), Département de Biologie Animale, Faculté des Sciences et Techniques, Université Cheikh Anta DIOP, Avenue Cheikh Anta DIOP, Dakar Fann, Dakar, Sénégal,Pole d’Immunophysiopathologie & Maladies Infectieuses (IMI), Institut Pasteur de Dakar, Dakar, Sénégal
| | - Cedric Coulonges
- Equipe GBA «Génomique, Bioinformatique & Applications », Conservatoire National des Arts et Métiers, Paris, France
| | - Céline Derbois
- CEA, Centre National de Recherche en Génomique Humaine, Université Paris-Saclay, Evry, France
| | - Babacar Mbengue
- Service d’Immunologie, Faculté de Médecine, de Pharmacie et d’Odontostomatologie, Université Cheikh Anta DIOP, Dakar, Sénégal
| | - Alassane Thiam
- Pole d’Immunophysiopathologie & Maladies Infectieuses (IMI), Institut Pasteur de Dakar, Dakar, Sénégal
| | - Cheikh Momar Nguer
- Groupe de Recherche Biotechnologie Appliquée et Bioprocédés Environnementaux (GRBA-BE), Laboratoire Eau, Energie, Environnement et Procédés Industriels (LE3PI), Département de Génie Chimique et Biologie Appliquée, Ecole Supérieure Polytechnique, Université Cheikh Anta DIOP de Dakar, Dakar Fann, Dakar, Sénégal
| | - Jean Francois Zagury
- Equipe GBA «Génomique, Bioinformatique & Applications », Conservatoire National des Arts et Métiers, Paris, France
| | - Jean-Francois Deleuze
- CEA, Centre National de Recherche en Génomique Humaine, Université Paris-Saclay, Evry, France
| | - Alioune Dieye
- Service d’Immunologie, Faculté de Médecine, de Pharmacie et d’Odontostomatologie, Université Cheikh Anta DIOP, Dakar, Sénégal
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15
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Waldman ZC, Schenk BR, Duhuze Karera MG, Patterson AC, Hormenu T, Mabundo LS, DuBose CW, Jagannathan R, Whitesell PL, Wentzel A, Horlyck-Romanovsky MF, Sumner AE. Sleep and Economic Status Are Linked to Daily Life Stress in African-Born Blacks Living in America. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19052562. [PMID: 35270258 PMCID: PMC8909882 DOI: 10.3390/ijerph19052562] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 02/08/2022] [Accepted: 02/17/2022] [Indexed: 02/01/2023]
Abstract
To identify determinants of daily life stress in Africans in America, 156 African-born Blacks (Age: 40 ± 10 years (mean ± SD), range 22–65 years) who came to the United States as adults (age ≥ 18 years) were asked about stress, sleep, behavior and socioeconomic status. Daily life stress and sleep quality were assessed with the Perceived Stress Scale (PSS) and Pittsburgh Sleep Quality Index (PSQI), respectively. High-stress was defined by the threshold of the upper quartile of population distribution of PSS (≥16) and low-stress as PSS < 16. Poor sleep quality required PSQI > 5. Low income was defined as <40 k yearly. In the high and low-stress groups, PSS were: 21 ± 4 versus 9 ± 4, p < 0.001 and PSQI were: 6 ± 3 versus 4 ± 3, p < 0.001, respectively. PSS and PSQI were correlated (r = 0.38, p < 0.001). The odds of high-stress were higher among those with poor sleep quality (OR 5.11, 95% CI: 2.07, 12.62), low income (OR 5.03, 95% CI: 1.75, 14.47), and no health insurance (OR 3.01, 95% CI: 1.19, 8.56). Overall, in African-born Blacks living in America, daily life stress appears to be linked to poor quality sleep and exacerbated by low income and lack of health insurance.
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Affiliation(s)
- Zoe C. Waldman
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (Z.C.W.); (B.R.S.); (M.G.D.K.); (A.C.P.); (T.H.); (L.S.M.); (C.W.D.); (A.W.); (M.F.H.-R.)
| | - Blayne R. Schenk
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (Z.C.W.); (B.R.S.); (M.G.D.K.); (A.C.P.); (T.H.); (L.S.M.); (C.W.D.); (A.W.); (M.F.H.-R.)
| | - Marie Grace Duhuze Karera
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (Z.C.W.); (B.R.S.); (M.G.D.K.); (A.C.P.); (T.H.); (L.S.M.); (C.W.D.); (A.W.); (M.F.H.-R.)
- National Institute of Minority Health and Health Disparities, Bethesda, MD 20892, USA
- Institute of Global Health Equity Research, University of Global Health Equity, Kigali 6955, Rwanda
| | - Arielle C. Patterson
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (Z.C.W.); (B.R.S.); (M.G.D.K.); (A.C.P.); (T.H.); (L.S.M.); (C.W.D.); (A.W.); (M.F.H.-R.)
| | - Thomas Hormenu
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (Z.C.W.); (B.R.S.); (M.G.D.K.); (A.C.P.); (T.H.); (L.S.M.); (C.W.D.); (A.W.); (M.F.H.-R.)
- Department of Health, Physical Education, University of Cape Coast, Cape Coast P.O. Box 5007, Ghana
| | - Lilian S. Mabundo
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (Z.C.W.); (B.R.S.); (M.G.D.K.); (A.C.P.); (T.H.); (L.S.M.); (C.W.D.); (A.W.); (M.F.H.-R.)
| | - Christopher W. DuBose
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (Z.C.W.); (B.R.S.); (M.G.D.K.); (A.C.P.); (T.H.); (L.S.M.); (C.W.D.); (A.W.); (M.F.H.-R.)
| | - Ram Jagannathan
- Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA;
| | - Peter L. Whitesell
- Howard University Hospital Sleep Disorders Center, Howard University, 2041 Georgia Ave, NW, Washington, DC 20060, USA;
| | - Annemarie Wentzel
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (Z.C.W.); (B.R.S.); (M.G.D.K.); (A.C.P.); (T.H.); (L.S.M.); (C.W.D.); (A.W.); (M.F.H.-R.)
| | - Margrethe F. Horlyck-Romanovsky
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (Z.C.W.); (B.R.S.); (M.G.D.K.); (A.C.P.); (T.H.); (L.S.M.); (C.W.D.); (A.W.); (M.F.H.-R.)
- Department of Health and Nutrition Sciences, Brooklyn College, City University of New York, New York, NY 11210, USA
| | - Anne E. Sumner
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (Z.C.W.); (B.R.S.); (M.G.D.K.); (A.C.P.); (T.H.); (L.S.M.); (C.W.D.); (A.W.); (M.F.H.-R.)
- National Institute of Minority Health and Health Disparities, Bethesda, MD 20892, USA
- Correspondence:
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Paintsil V, Amuzu EX, Nyanor I, Asafo-Adjei E, Mohammed AR, Yawnumah SA, Oppong-Mensah YG, Nguah SB, Obeng P, Dogbe EE, Jonas M, Nembaware V, Mazandu G, Ohene-Frempong K, Wonkam A, Makani J, Ansong D, Osei-Akoto A. Establishing a Sickle Cell Disease Registry in Africa: Experience From the Sickle Pan-African Research Consortium, Kumasi-Ghana. Front Genet 2022; 13:802355. [PMID: 35281803 PMCID: PMC8908904 DOI: 10.3389/fgene.2022.802355] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 01/24/2022] [Indexed: 11/13/2022] Open
Abstract
Sickle cell disease (SCD) is the most common clinically significant hemoglobinopathy, characterized by painful episodes, anemia, high risk of infection, and other acute and chronic complications. In Africa, where the disease is most prevalent, large longitudinal data on patients and their outcomes are lacking. This article describes the experiences of the Kumasi Center for SCD at the Komfo Anokye Teaching Hospital (KCSCD-KATH), a Sickle Pan-African Research Consortium (SPARCO) site and a SickleInAfrica Consortium member, in establishing a SCD registry for the evaluation of the outcomes of patients. It also provides a report of a preliminary analysis of the data. The process of developing the registry database involved comprehensive review of the center's SCD patient medical records, incorporating data elements developed by the SickleInAfrica Consortium and obtaining ethical clearance from the local Institutional Review Board. From December 2017 to March 2020, 3,148 SCD patients were enrolled into the SCD registry. Enrollment was during the SCD outpatient clinic visits or through home visits. A significant proportion of the patients was from the newborn screening cohort (50.3%) and was males (52.9%). SCD-SS, SCD-SC, and Sβ +thalassemia were seen in 67.2, 32.5, and 0.3% patients, respectively. The majority of the patients were in a steady state at enrollment; however, some were enrolled after discharge for an acute illness admission. The top two clinical diagnoses for SCD-SS patients were sickle cell painful events and acute anemia secondary to hyperhemolysis with incidence rates of 141.86 per 10,000 person months of observation (PMO) and 32.74 per 10,000 PMO, respectively. In SCD-SC patients, the top two diagnoses were sickle cell painful events and avascular necrosis with incidence rates of 203.09 per 10,000 PMO and 21.19 per 10,000 PMO, respectively. The SPARCO Kumasi site has developed skills and infrastructure to design, manage, and analyze data in the SCD registry. The newborn screening program and alternative recruitment methods such as radio announcement and home visits for defaulting patients were the key steps taken in enrolling patients into the registry. The registry will provide longitudinal data that will help improve knowledge of SCD in Ghana and Africa through research.
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Affiliation(s)
- Vivian Paintsil
- Directorate of Child Health-Komfo Anokye Teaching Hospital, Kumasi, Ghana.,Department of Child Health-Kwame Nkrumah University of Science and Technology, School of Medicine and Dentistry, Kumasi, Ghana
| | - Evans Xorse Amuzu
- Directorate of Child Health-Komfo Anokye Teaching Hospital, Kumasi, Ghana
| | - Isaac Nyanor
- Directorate of Child Health-Komfo Anokye Teaching Hospital, Kumasi, Ghana
| | | | | | | | | | - Samuel Blay Nguah
- Directorate of Child Health-Komfo Anokye Teaching Hospital, Kumasi, Ghana.,Department of Child Health-Kwame Nkrumah University of Science and Technology, School of Medicine and Dentistry, Kumasi, Ghana
| | - Paul Obeng
- Directorate of Child Health-Komfo Anokye Teaching Hospital, Kumasi, Ghana.,Department of Child Health-Kwame Nkrumah University of Science and Technology, School of Medicine and Dentistry, Kumasi, Ghana
| | - Elliot Eli Dogbe
- Directorate of Child Health-Komfo Anokye Teaching Hospital, Kumasi, Ghana
| | - Mario Jonas
- Department of Pathology, Division of Human Genetics, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Victoria Nembaware
- Department of Pathology, Division of Human Genetics, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Gaston Mazandu
- Department of Pathology, Division of Human Genetics, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | | | - Ambroise Wonkam
- Department of Pathology, Division of Human Genetics, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Julie Makani
- SPARCo, Sickle Cell Programme, Muhimbili University of Health and Allied Sciences, Dar Es Salam, Tanzania
| | - Daniel Ansong
- Directorate of Child Health-Komfo Anokye Teaching Hospital, Kumasi, Ghana.,Department of Child Health-Kwame Nkrumah University of Science and Technology, School of Medicine and Dentistry, Kumasi, Ghana
| | - Alex Osei-Akoto
- Directorate of Child Health-Komfo Anokye Teaching Hospital, Kumasi, Ghana.,Department of Child Health-Kwame Nkrumah University of Science and Technology, School of Medicine and Dentistry, Kumasi, Ghana
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17
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Qua K, Swiatkowski SM, Gurkan UA, Pelfrey CM. A retrospective case study of successful translational research: Gazelle Hb variant point-of-care diagnostic device for sickle cell disease. J Clin Transl Sci 2021; 5:e207. [PMID: 35047218 PMCID: PMC8727719 DOI: 10.1017/cts.2021.871] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 10/19/2021] [Accepted: 10/19/2021] [Indexed: 11/06/2022] Open
Abstract
Evaluation researchers at Clinical and Translational Science Award (CTSA) hubs are conducting retrospective case studies to evaluate the translational research process. The objective of this study was to deepen knowledge of the translational process and identify contributors to successful translation. We investigated the successful translation of the HemeChip, a low-cost point-of-care diagnostic device for sickle cell disease, using a protocol for retrospective translational science case studies of health interventions developed by evaluators at the National Health Institutes (NIH) and CTSA hubs. Development of the HemeChip began in 2013 and evidence of device use and impact on public health is growing. Data collection methods included five interviews and a review of press, publications, patents, and grants. Barriers to translation included proving novelty, manufacturing costs, fundraising, and academic-industry relations. Facilitators to translation were CTSA pilot program funding, university resources, entrepreneurship training, due diligence, and collaborations. The barriers to translation, how they were overcome, and the key facilitators identified in this case study pinpoint areas for consideration in future funding mechanisms and the infrastructure required to enable successful translation.
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Affiliation(s)
- Kelli Qua
- Clinical and Translational Science Collaborative, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Shannon M. Swiatkowski
- Clinical and Translational Science Collaborative, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Umut A. Gurkan
- Department of Mechanical and Aerospace Engineering, School of Engineering, Case Western Reserve University, Cleveland, OH, USA
- Department of Biomedical Engineering, Case School of Engineering, Case Wetern Reserve University, Cleveland, OH, USA
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, USA
| | - Clara M. Pelfrey
- Clinical and Translational Science Collaborative, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
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18
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Esoh K, Wonkam-Tingang E, Wonkam A. Sickle cell disease in sub-Saharan Africa: transferable strategies for prevention and care. Lancet Haematol 2021; 8:e744-e755. [PMID: 34481550 DOI: 10.1016/s2352-3026(21)00191-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 05/27/2021] [Accepted: 06/10/2021] [Indexed: 12/22/2022]
Abstract
Sickle cell disease can be life-threatening or chronically debilitating for both children and adults. Worldwide, more than 300 000 children are born with sickle cell disease every year, over 75% of whom in sub-Saharan Africa. Increased awareness and early interventions, such as neonate screening and comprehensive care, have led to considerable reductions in mortality in children younger than 5 years in high-income countries. However, sickle cell disease prevention and care have largely been neglected in Africa. Without intervention, 50-90% of affected children in many sub-Saharan African countries die before their fifth birthday. Fortunately, increasing initiatives in sub-Saharan Africa are piloting interventions such as neonate screening and comprehensive care, and as mortality declines, quality of life and increased life expectancy become major targets for interventions. Hydroxyurea (hydroxycarbamide) and haematopoietic stem-cell transplantation have already been shown to be effective therapies in high-income countries, but are either not widely accessible or too expensive for most African populations. These challenges are being alleviated by numerous networks evolving through international collaborations that are positively changing the outlook of sickle cell disease management in sub-Saharan Africa. In this Series paper, we describe the epidemiology, pathophysiology, clinicobiological profile, and psychosocial effects of sickle cell disease in sub-Saharan Africa. We highlight transferable strategies already used for the successful management of the condition and key strategies and recommendations for affordable and comprehensive care on the continent. TRANSLATION: For the French translation of the abstract see Supplementary Materials section.
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Affiliation(s)
- Kevin Esoh
- Division of Human Genetics, Department of Pathology, University of Cape Town, Cape Town, South Africa
| | - Edmond Wonkam-Tingang
- Division of Human Genetics, Department of Pathology, University of Cape Town, Cape Town, South Africa
| | - Ambroise Wonkam
- Division of Human Genetics, Department of Pathology, University of Cape Town, Cape Town, South Africa; Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.
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19
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Segbefia CI, Goka B, Welbeck J, Amegan-Aho K, Dwuma-Badu D, Rao S, Salifu N, Oppong SA, Odei E, Ohene-Frempong K, Odame I. Implementing newborn screening for sickle cell disease in Korle Bu Teaching Hospital, Accra: Results and lessons learned. Pediatr Blood Cancer 2021; 68:e29068. [PMID: 33890391 DOI: 10.1002/pbc.29068] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 02/27/2021] [Accepted: 03/24/2021] [Indexed: 11/09/2022]
Abstract
BACKGROUND Early diagnosis of sickle cell disease (SCD) through newborn screening (NBS) is a cost-effective intervention, which reduces morbidity and mortality. In sub-Saharan Africa (SSA) where disease burden is greatest, there are no universal NBS programs and few institutions have the capacity to conduct NBS. We determined the feasibility and challenges of implementing NBS for SCD in Ghana's largest public hospital. PROCEDURE The SCD NBS program at Korle Bu Teaching Hospital (KBTH) is a multiyear partnership between the hospital and the SickKids Center for Global Child Health, Toronto, being implemented in phases. The 13-month demonstration phase (June 2017-July 2018) and phase one (November 2018-December 2019) focused on staff training and the feasibility of universal screening of babies born in KBTH. RESULTS During the demonstration phase, 115 public health nurses and midwives acquired competency in heel stick for dried blood spot sampling. Out of 9990 newborns, 4427 babies (44.3%) were screened, of which 79 (1.8%) were identified with presumptive SCD (P-SCD). Major challenges identified included inadequate nursing staff to perform screening, shortage of screening supplies, and delays in receiving screening results. Strategies to overcome some of the challenges were incorporated into phase one, resulting in increased screening coverage to 83.7%. CONCLUSIONS Implementing NBS for SCD in KBTH presented challenges with implications on achieving and sustaining universal NBS in KBTH and other settings in SSA. Specific steps addressing these challenges comprehensively will help build on the modest initial gains, moving closer toward a sustainable national NBS program.
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Affiliation(s)
- Catherine I Segbefia
- University of Ghana Medical School, College of Health Sciences, Accra, Ghana.,Korle Bu Teaching Hospital, Accra, Ghana
| | - Bamenla Goka
- University of Ghana Medical School, College of Health Sciences, Accra, Ghana.,Korle Bu Teaching Hospital, Accra, Ghana
| | - Jennifer Welbeck
- University of Ghana Medical School, College of Health Sciences, Accra, Ghana.,Korle Bu Teaching Hospital, Accra, Ghana
| | | | | | - Sudha Rao
- Korle Bu Teaching Hospital, Accra, Ghana
| | | | - Samuel A Oppong
- University of Ghana Medical School, College of Health Sciences, Accra, Ghana.,Korle Bu Teaching Hospital, Accra, Ghana
| | - Eric Odei
- Korle Bu Teaching Hospital, Accra, Ghana
| | | | - Isaac Odame
- Center for Global Child Health, The Hospital for Sick Children, Toronto, Ontario, Canada.,Division of Haematology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
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20
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Prusty D, Gupta N, Upadhyay A, Dar A, Naik B, Kumar N, Prajapati VK. Asymptomatic malaria infection prevailing risks for human health and malaria elimination. INFECTION GENETICS AND EVOLUTION 2021; 93:104987. [PMID: 34216796 DOI: 10.1016/j.meegid.2021.104987] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 06/23/2021] [Accepted: 06/27/2021] [Indexed: 01/09/2023]
Abstract
There has been a consistent rise in malaria cases in the last few years. The existing malaria control measures are challenged by insecticide resistance in the mosquito vector, drug résistance in parasite populations, and asymptomatic malaria (ASM) in healthy individuals. The absence of apparent malaria symptoms and the presence of low parasitemia makes ASM a hidden reservoir for malaria transmission and an impediment in malaria elimination efforts. This review focuses on ASM in malaria-endemic countries and the past and present research trends from those geographical locations. The harmful impacts of asymptomatic malaria on human health and its contribution to disease transmission are highlighted. We discuss certain crucial genetic changes in the parasite and host immune response necessary for maintaining low parasitemia leading to long-term parasite survival in the host. Since the chronic health effects and the potential roles for disease transmission of ASM remain mostly unknown to significant populations, we offer proposals for developing general awareness. We also suggest advanced technology-based diagnostic methods, and treatment strategies to eliminate ASM.
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Affiliation(s)
- Dhaneswar Prusty
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, 305817, Rajasthan, India.
| | - Nidhi Gupta
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, 305817, Rajasthan, India
| | - Arun Upadhyay
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, 305817, Rajasthan, India
| | - Ashraf Dar
- Department of Biochemistry, University of Kashmir, Hazaratbal, Srinagar 190006, Jammu and Kashmir, India
| | - Biswajit Naik
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, 305817, Rajasthan, India
| | - Navin Kumar
- School of Biotechnology, Gautam Buddha University, Greater Noida, 201308, UP, India
| | - Vijay Kumar Prajapati
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, 305817, Rajasthan, India
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21
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Gouraud E, Connes P, Gauthier-Vasserot A, Faes C, Merazga S, Poutrel S, Renoux C, Boisson C, Joly P, Bertrand Y, Hot A, Cannas G, Hautier C. Is Skeletal Muscle Dysfunction a Limiting Factor of Exercise Functional Capacity in Patients with Sickle Cell Disease? J Clin Med 2021; 10:jcm10112250. [PMID: 34067352 PMCID: PMC8196873 DOI: 10.3390/jcm10112250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 05/20/2021] [Accepted: 05/21/2021] [Indexed: 02/02/2023] Open
Abstract
Patients with sickle cell disease (SCD) have reduced functional capacity due to anemia and cardio-respiratory abnormalities. Recent studies also suggest the presence of muscle dysfunction. However, the interaction between exercise capacity and muscle function is currently unknown in SCD. The aim of this study was to explore how muscle dysfunction may explain the reduced functional capacity. Nineteen African healthy subjects (AA), and 24 sickle cell anemia (SS) and 18 sickle cell hemoglobin C (SC) patients were recruited. Maximal isometric torque (Tmax) was measured before and after a self-paced 6-min walk test (6-MWT). Electromyographic activity of the Vastus Lateralis was recorded. The 6-MWT distance was reduced in SS (p < 0.05) and SC (p < 0.01) patients compared to AA subjects. However, Tmax and root mean square value were not modified by the 6-MWT, showing no skeletal muscle fatigue in all groups. In a multiple linear regression model, genotype, step frequency and hematocrit were independent predictors of the 6-MWT distance in SCD patients. Our results suggest that the 6-MWT performance might be primarily explained by anemia and the self-paced step frequency in SCD patients attempting to limit metabolic cost and fatigue, which could explain the absence of muscle fatigue.
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Affiliation(s)
- Etienne Gouraud
- Inter-University Laboratory of Human Movement Sciences (LIBM) EA7424, Team “Vascular Biology and Red Blood Cell”, University Claude Bernard Lyon 1, 69100 Villeurbanne, France; (P.C.); (A.G.-V.); (C.F.); (C.R.); (C.B.); (P.J.); (G.C.); (C.H.)
- Laboratory of Excellence “GR-Ex”, 75015 Paris, France
- Correspondence:
| | - Philippe Connes
- Inter-University Laboratory of Human Movement Sciences (LIBM) EA7424, Team “Vascular Biology and Red Blood Cell”, University Claude Bernard Lyon 1, 69100 Villeurbanne, France; (P.C.); (A.G.-V.); (C.F.); (C.R.); (C.B.); (P.J.); (G.C.); (C.H.)
- Laboratory of Excellence “GR-Ex”, 75015 Paris, France
- Institute of Universities of France, CEDEX 05, 75231 Paris, France
| | - Alexandra Gauthier-Vasserot
- Inter-University Laboratory of Human Movement Sciences (LIBM) EA7424, Team “Vascular Biology and Red Blood Cell”, University Claude Bernard Lyon 1, 69100 Villeurbanne, France; (P.C.); (A.G.-V.); (C.F.); (C.R.); (C.B.); (P.J.); (G.C.); (C.H.)
- Laboratory of Excellence “GR-Ex”, 75015 Paris, France
- Hematology and Oncology Pediatric Unit, University Hospital of Lyon, 69008 Lyon, France;
- Reference Centre in Sickle Cell Disease, Thalassemia and Rare Red Blood Cell and Erythropoiesis Diseases, Hospices Civils de Lyon, 69003 Lyon, France; (S.M.); (S.P.); (A.H.)
| | - Camille Faes
- Inter-University Laboratory of Human Movement Sciences (LIBM) EA7424, Team “Vascular Biology and Red Blood Cell”, University Claude Bernard Lyon 1, 69100 Villeurbanne, France; (P.C.); (A.G.-V.); (C.F.); (C.R.); (C.B.); (P.J.); (G.C.); (C.H.)
- Laboratory of Excellence “GR-Ex”, 75015 Paris, France
| | - Salima Merazga
- Reference Centre in Sickle Cell Disease, Thalassemia and Rare Red Blood Cell and Erythropoiesis Diseases, Hospices Civils de Lyon, 69003 Lyon, France; (S.M.); (S.P.); (A.H.)
| | - Solène Poutrel
- Reference Centre in Sickle Cell Disease, Thalassemia and Rare Red Blood Cell and Erythropoiesis Diseases, Hospices Civils de Lyon, 69003 Lyon, France; (S.M.); (S.P.); (A.H.)
- Internal Medicine Department, Edouard-Herriot Hospital, 69003 Lyon, France
| | - Céline Renoux
- Inter-University Laboratory of Human Movement Sciences (LIBM) EA7424, Team “Vascular Biology and Red Blood Cell”, University Claude Bernard Lyon 1, 69100 Villeurbanne, France; (P.C.); (A.G.-V.); (C.F.); (C.R.); (C.B.); (P.J.); (G.C.); (C.H.)
- Laboratory of Excellence “GR-Ex”, 75015 Paris, France
- Laboratory of Biochemistry of Erythrocyte Pathologies, Biology Centre East, 69500 Bron, France
| | - Camille Boisson
- Inter-University Laboratory of Human Movement Sciences (LIBM) EA7424, Team “Vascular Biology and Red Blood Cell”, University Claude Bernard Lyon 1, 69100 Villeurbanne, France; (P.C.); (A.G.-V.); (C.F.); (C.R.); (C.B.); (P.J.); (G.C.); (C.H.)
- Laboratory of Excellence “GR-Ex”, 75015 Paris, France
| | - Philippe Joly
- Inter-University Laboratory of Human Movement Sciences (LIBM) EA7424, Team “Vascular Biology and Red Blood Cell”, University Claude Bernard Lyon 1, 69100 Villeurbanne, France; (P.C.); (A.G.-V.); (C.F.); (C.R.); (C.B.); (P.J.); (G.C.); (C.H.)
- Laboratory of Excellence “GR-Ex”, 75015 Paris, France
- Laboratory of Biochemistry of Erythrocyte Pathologies, Biology Centre East, 69500 Bron, France
| | - Yves Bertrand
- Hematology and Oncology Pediatric Unit, University Hospital of Lyon, 69008 Lyon, France;
- Reference Centre in Sickle Cell Disease, Thalassemia and Rare Red Blood Cell and Erythropoiesis Diseases, Hospices Civils de Lyon, 69003 Lyon, France; (S.M.); (S.P.); (A.H.)
| | - Arnaud Hot
- Reference Centre in Sickle Cell Disease, Thalassemia and Rare Red Blood Cell and Erythropoiesis Diseases, Hospices Civils de Lyon, 69003 Lyon, France; (S.M.); (S.P.); (A.H.)
- Internal Medicine Department, Edouard-Herriot Hospital, 69003 Lyon, France
| | - Giovanna Cannas
- Inter-University Laboratory of Human Movement Sciences (LIBM) EA7424, Team “Vascular Biology and Red Blood Cell”, University Claude Bernard Lyon 1, 69100 Villeurbanne, France; (P.C.); (A.G.-V.); (C.F.); (C.R.); (C.B.); (P.J.); (G.C.); (C.H.)
- Laboratory of Excellence “GR-Ex”, 75015 Paris, France
- Reference Centre in Sickle Cell Disease, Thalassemia and Rare Red Blood Cell and Erythropoiesis Diseases, Hospices Civils de Lyon, 69003 Lyon, France; (S.M.); (S.P.); (A.H.)
- Internal Medicine Department, Edouard-Herriot Hospital, 69003 Lyon, France
| | - Christophe Hautier
- Inter-University Laboratory of Human Movement Sciences (LIBM) EA7424, Team “Vascular Biology and Red Blood Cell”, University Claude Bernard Lyon 1, 69100 Villeurbanne, France; (P.C.); (A.G.-V.); (C.F.); (C.R.); (C.B.); (P.J.); (G.C.); (C.H.)
- Laboratory of Excellence “GR-Ex”, 75015 Paris, France
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22
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Esoh K, Wonkam A. Evolutionary history of sickle-cell mutation: implications for global genetic medicine. Hum Mol Genet 2021; 30:R119-R128. [PMID: 33461216 PMCID: PMC8117455 DOI: 10.1093/hmg/ddab004] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/04/2021] [Accepted: 01/05/2021] [Indexed: 12/25/2022] Open
Abstract
Resistance afforded by the sickle-cell trait against severe malaria has led to high frequencies of the sickle-cell mutation [HBB; c.20T>A, p.Glu6Val; OMIM: 141900 (HBB-βS)] in most parts of Africa. High-coverage sequencing and genotype data have now confirmed the single African origin of the sickle-cell gene variant [HBB; c.20T>A, p.Glu6Val; OMIM: 141900 (HBB-βS)]. Nevertheless, the classical HBB-like genes cluster haplotypes remain a rich source of HBB-βS evolutionary information. The overlapping distribution of HBB-βS and other disease-associated variants means that their evolutionary genetics must be investigated concurrently. In this review: (1) we explore the evolutionary history of HBB-βS and its implications in understanding human migration within and out of Africa: e.g. HBB haplotypes and recent migration paths of the Bantu expansion, occurrence of ~7% of the Senegal haplotype in Angola reflecting changes in population/SCD dynamics, and existence of all five classical HBB haplotype in Cameroon and Egypt suggesting a much longer presence of HBB-βS in these regions; (2) we discuss the time estimates of the emergence of HBB-βS in Africa and finally, (3) we discuss implications for genetic medicine in understanding complex epistatic interactions between HBB-βS and other gene variants selected under environmental pressure in Africa e.g. variants in HBB, HBA, G6PD, APOL1, APOE, OSBPL10 and RXRA.
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Affiliation(s)
- Kevin Esoh
- Division of Human Genetics, Department of Pathology, University of Cape Town, Cape Town, South Africa
| | - Ambroise Wonkam
- Division of Human Genetics, Department of Pathology, University of Cape Town, Cape Town, South Africa
- Department of Medicine, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
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23
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Venkatesan V, Srinivasan S, Babu P, Thangavel S. Manipulation of Developmental Gamma-Globin Gene Expression: an Approach for Healing Hemoglobinopathies. Mol Cell Biol 2020; 41:e00253-20. [PMID: 33077498 PMCID: PMC7849396 DOI: 10.1128/mcb.00253-20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
β-Hemoglobinopathies are the most common monogenic disorders, and a century of research has provided us with a better understanding of the attributes of these diseases. Allogenic stem cell transplantation was the only potentially curative option available for these diseases until the discovery of gene therapy. The findings on the protective nature of fetal hemoglobin in sickle cell disease (SCD) and thalassemia patients carrying hereditary persistence of fetal hemoglobin (HPFH) mutations has given us the best evidence that the cure for β-hemoglobinopathies remains hidden in the hemoglobin locus. The detailed understanding of the developmental gene regulation of gamma-globin (γ-globin) and the emergence of gene manipulation strategies offer us the opportunity for developing a γ-globin gene-modified autologous stem cell transplantation therapy. In this review, we summarize different therapeutic strategies that reactivate fetal hemoglobin for the gene therapy of β-hemoglobinopathies.
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Affiliation(s)
- Vigneshwaran Venkatesan
- Centre for Stem Cell Research (CSCR), InStem Bengaluru, Christian Medical College, Vellore, Tamil Nadu, India
- Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Saranya Srinivasan
- Centre for Stem Cell Research (CSCR), InStem Bengaluru, Christian Medical College, Vellore, Tamil Nadu, India
| | - Prathibha Babu
- Centre for Stem Cell Research (CSCR), InStem Bengaluru, Christian Medical College, Vellore, Tamil Nadu, India
- Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Saravanabhavan Thangavel
- Centre for Stem Cell Research (CSCR), InStem Bengaluru, Christian Medical College, Vellore, Tamil Nadu, India
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24
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Amuzu DS, Rockett KA, Leffler EM, Ansah F, Amoako N, Morang'a CM, Hubbart C, Rowlands K, Jeffreys AE, Amenga-Etego LN, Kwiatkowski DP, Awandare GA. High-throughput genotyping assays for identification of glycophorin B deletion variants in population studies. Exp Biol Med (Maywood) 2020; 246:916-928. [PMID: 33325748 PMCID: PMC8022085 DOI: 10.1177/1535370220968545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Glycophorins are the most abundant sialoglycoproteins on the surface of human erythrocyte membranes. Genetic variation in glycophorin region of human chromosome 4 (containing GYPA, GYPB, and GYPE genes) is of interest because the gene products serve as receptors for pathogens of major public health interest, including Plasmodiumsp., Babesiasp., Influenza virus, Vibrio cholerae El Tor Hemolysin, and Escherichia coli. A large structural rearrangement and hybrid glycophorin variant, known as Dantu, which was identified in East African populations, has been linked with a 40% reduction in risk for severe malaria. Apart from Dantu, other large structural variants exist, with the most common being deletion of the whole GYPB gene and its surrounding region, resulting in multiple different deletion forms. In West Africa particularly, these deletions are estimated to account for between 5 and 15% of the variation in different populations, mostly attributed to the forms known as DEL1 and DEL2. Due to the lack of specific variant assays, little is known of the distribution of these variants. Here, we report a modification of a previous GYPB DEL1 assay and the development of a novel GYPB DEL2 assay as high-throughput PCR-RFLP assays, as well as the identification of the crossover/breakpoint for GYPB DEL2. Using 393 samples from three study sites in Ghana as well as samples from HapMap and 1000 G projects for validation, we show that our assays are sensitive and reliable for genotyping GYPB DEL1 and DEL2. To the best of our knowledge, this is the first report of such high-throughput genotyping assays by PCR-RFLP for identifying specific GYPB deletion types in populations. These assays will enable better identification of GYPB deletions for large genetic association studies and functional experiments to understand the role of this gene cluster region in susceptibility to malaria and other diseases.
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Affiliation(s)
- Dominic Sy Amuzu
- West African Centre for Cell Biology of Infectious Pathogens, University of Ghana, Accra, GH 0233, Ghana.,Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Accra, GH 0233, Ghana.,Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7BN, UK
| | - Kirk A Rockett
- Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7BN, UK.,Wellcome Sanger Institute, Hinxton CB10 1SA, UK
| | - Ellen M Leffler
- Wellcome Sanger Institute, Hinxton CB10 1SA, UK.,Department of Human Genetics, Eccles Institute of Human Genetics, University of Utah, Salt Lake City, UT 84112-5330, USA
| | - Felix Ansah
- West African Centre for Cell Biology of Infectious Pathogens, University of Ghana, Accra, GH 0233, Ghana.,Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Accra, GH 0233, Ghana
| | - Nicholas Amoako
- West African Centre for Cell Biology of Infectious Pathogens, University of Ghana, Accra, GH 0233, Ghana.,Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Accra, GH 0233, Ghana
| | - Collins M Morang'a
- West African Centre for Cell Biology of Infectious Pathogens, University of Ghana, Accra, GH 0233, Ghana.,Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Accra, GH 0233, Ghana
| | - Christina Hubbart
- Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7BN, UK
| | - Kate Rowlands
- Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7BN, UK
| | - Anna E Jeffreys
- Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7BN, UK
| | - Lucas N Amenga-Etego
- West African Centre for Cell Biology of Infectious Pathogens, University of Ghana, Accra, GH 0233, Ghana.,Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Accra, GH 0233, Ghana
| | - Dominic P Kwiatkowski
- Wellcome Centre for Human Genetics, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7BN, UK.,Wellcome Sanger Institute, Hinxton CB10 1SA, UK.,Big Data Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7FZ, UK
| | - Gordon A Awandare
- West African Centre for Cell Biology of Infectious Pathogens, University of Ghana, Accra, GH 0233, Ghana.,Department of Biochemistry, Cell and Molecular Biology, University of Ghana, Accra, GH 0233, Ghana
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25
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Shoup EM, Hormenu T, Osei-Tutu NH, Ishimwe MCS, Patterson AC, DuBose CW, Wentzel A, Horlyck-Romanovsky MF, Sumner AE. Africans Who Arrive in the United States before 20 Years of Age Maintain Both Cardiometabolic Health and Cultural Identity: Insight from the Africans in America Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17249405. [PMID: 33333954 PMCID: PMC7765413 DOI: 10.3390/ijerph17249405] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/02/2020] [Accepted: 12/11/2020] [Indexed: 12/13/2022]
Abstract
The overall consensus is that foreign-born adults who come to America age < 20 y achieve economic success but develop adverse behaviors (smoking and drinking) that lead to worse cardiometabolic health than immigrants who arrive age ≥ 20 y. Whether age of immigration affects the health of African-born Blacks living in America is unknown. Our goals were to examine cultural identity, behavior, and socioeconomic factors and determine if differences exist in the cardiometabolic health of Africans who immigrated to America before and after age 20 y. Of the 482 enrollees (age: 38 ± 1 (mean ± SE), range: 20–65 y) in the Africans in America cohort, 23% (111/482) arrived age < 20 y, and 77% (371/482) arrived age ≥ 20 y. Independent of francophone status or African region of origin, Africans who immigrated age < 20 y had similar or better cardiometabolic health than Africans who immigrated age ≥ 20 y. The majority of Africans who immigrated age < 20 y identified as African, had African-born spouses, exercised, did not adopt adverse health behaviors, and actualized early life migration advantages, such as an American university education. Due to maintenance of cultural identity and actualization of opportunities in America, cardiometabolic health may be protected in Africans who immigrate before age 20. In short, immigrant health research must be cognizant of the diversity within the foreign-born community and age of immigration.
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Affiliation(s)
- Elyssa M. Shoup
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (E.M.S.); (T.H.); (N.H.O.-T.); (M.C.S.I.); (A.C.P.); (C.W.D.); (A.W.)
| | - Thomas Hormenu
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (E.M.S.); (T.H.); (N.H.O.-T.); (M.C.S.I.); (A.C.P.); (C.W.D.); (A.W.)
| | - Nana H. Osei-Tutu
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (E.M.S.); (T.H.); (N.H.O.-T.); (M.C.S.I.); (A.C.P.); (C.W.D.); (A.W.)
| | - M. C. Sage Ishimwe
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (E.M.S.); (T.H.); (N.H.O.-T.); (M.C.S.I.); (A.C.P.); (C.W.D.); (A.W.)
- National Institute of Minority Health and Health Disparities, Bethesda, MD 20892, USA
- Institute of Global Health Equity Research, University of Global Health Equity, Kigali 6955, Rwanda
| | - Arielle C. Patterson
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (E.M.S.); (T.H.); (N.H.O.-T.); (M.C.S.I.); (A.C.P.); (C.W.D.); (A.W.)
| | - Christopher W. DuBose
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (E.M.S.); (T.H.); (N.H.O.-T.); (M.C.S.I.); (A.C.P.); (C.W.D.); (A.W.)
| | - Annemarie Wentzel
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (E.M.S.); (T.H.); (N.H.O.-T.); (M.C.S.I.); (A.C.P.); (C.W.D.); (A.W.)
| | | | - Anne E. Sumner
- Section on Ethnicity and Health, Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892, USA; (E.M.S.); (T.H.); (N.H.O.-T.); (M.C.S.I.); (A.C.P.); (C.W.D.); (A.W.)
- National Institute of Minority Health and Health Disparities, Bethesda, MD 20892, USA
- Correspondence:
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Eastburg L, Peckham A, Kawira E, Chirangi B, Adler D, Akungo BD, Smart LR, Ambrose EE. Extremely high birth prevalence of sickle cell disease in rural Tanzania. Pediatr Blood Cancer 2020; 67:e28620. [PMID: 32803850 PMCID: PMC9444349 DOI: 10.1002/pbc.28620] [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: 04/05/2020] [Revised: 07/11/2020] [Accepted: 07/13/2020] [Indexed: 11/11/2022]
Abstract
BACKGROUND/OBJECTIVES Sickle cell disease (SCD) is an important, hidden cause of childhood mortality worldwide. It is most prevalent in sub-Saharan Africa where national newborn screening programs remain unavailable and most children in rural areas are never diagnosed. We conducted a study at a rural district hospital in northern Tanzania to determine the birth prevalence and community awareness of SCD and to determine the feasibility of using point-of-care testing to enroll newborns in a new SCD clinic for ongoing treatment. DESIGN/METHODS We screened infants at Shirati KMT hospital for SCD using HemoTypeSC, an inexpensive point-of-care test. Infants who screened positive were enrolled in the SCD clinic and instructed to return at 6-12 weeks for confirmatory testing, counseling, and preventive care. RESULTS A total of 999 newborns were screened from February to September 2019. Among these, 31.6% (315/999) had sickle cell trait and 3.9% (39/999) had SCD. No hemoglobin C was detected. Very few parents knew their own sickle cell status (0.3%). At 5 months after completion, 12 infants from the screening study and 30 additional children had been seen at the SCD clinic for ongoing counseling and care. CONCLUSIONS Birth prevalence of SCD in rural Tanzania is extremely high and community awareness is low. Newborn point-of-care testing enhances case finding and enables early enrollment in preventive care for SCD, even in rural sub-Saharan Africa with minimal laboratory capacity. SCD-specific clinical services implemented at the district hospital level could expand access to many children and significantly reduce early SCD morbidity and mortality.
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Affiliation(s)
- Luke Eastburg
- University of Rochester Medical Center, Rochester, New York
| | - Andrew Peckham
- University of Rochester Medical Center, Rochester, New York
| | | | | | - David Adler
- University of Rochester Medical Center, Rochester, New York
| | | | - Luke R. Smart
- Division of Hematology, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
| | - Emmanuela E. Ambrose
- Department of Paediatrics and Child Health, Catholic University of Health & Allied Sciences and Bugando Medical Centre, Mwanza, Tanzania
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Ambrose EE, Smart LR, Charles M, Hernandez AG, Latham T, Hokororo A, Beyanga M, Howard TA, Kamugisha E, McElhinney KE, Tebuka E, Ware RE. Surveillance for sickle cell disease, United Republic of Tanzania. Bull World Health Organ 2020; 98:859-868. [PMID: 33293746 PMCID: PMC7716099 DOI: 10.2471/blt.20.253583] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 08/17/2020] [Accepted: 08/28/2020] [Indexed: 11/27/2022] Open
Abstract
Objective To determine the regional- and district-level newborn prevalence of sickle cell trait and disease, and the prevalence of haemoglobin variants and genetic modifiers of sickle cell disease, in the nine regions of north-western United Republic of Tanzania. Methods We repurposed dried blood spot samples from children (aged 0–24 months) born to mothers living with human immunodeficiency virus (HIV), collected as part of the HIV Early Infant Diagnosis programme, for sickle cell diagnosis. We performed isoelectric focusing to determine whether samples had normal haemoglobin, sickle cell trait, sickle cell disease or a rare haemoglobin variant. We shipped samples diagnosed as disease or variant to Cincinnati Children’s Hospital in the United States of America for deoxyribonucleic-acid-based analyses to determine the prevalence of α-thalassaemia, glucose-6-phosphate dehydrogenase (G6PD) deficiency or fetal haemoglobin genetic modifiers. Findings We analysed a total of 17 200 specimens during February 2017–May 2018. We observed a prevalence of sickle cell trait and disease of 20.3% (3492/17 200) and 1.2% (210/17 200), respectively. District-level trait varied from 8.6% (5/58) to 28.1% (77/274). Among confirmed sickle cell disease specimens, we noted 42.7% (61/143) had 1-gene deletion and 14.7% (21/143) had 2-gene deletion α-thalassaemia trait. We documented G6PD A– deficiency in 19.2% (14/73) of males. Conclusion Our calculated prevalence is twice as high as previously reported and reinforces the need for enhanced sickle cell diagnostic services. Our district-level data will inform public health policy, allowing screening and disease-modifying hydroxyurea therapy to be focused on high-prevalence areas, until universal newborn screening is available.
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Affiliation(s)
- Emmanuela E Ambrose
- Department of Paediatrics and Child Health, Catholic University of Health and Allied Sciences, Mwanza, United Republic of Tanzania
| | - Luke R Smart
- Division of Hematology, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati Children's Hospital, 3333 Burnet Avenue, MLC 7015 Cincinnati, Ohio 45229, United States of America
| | - Mwesige Charles
- Department of Laboratory Services, Bugando Medical Centre, Mwanza, United Republic of Tanzania
| | - Arielle G Hernandez
- Division of Hematology, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati Children's Hospital, 3333 Burnet Avenue, MLC 7015 Cincinnati, Ohio 45229, United States of America
| | - Teresa Latham
- Division of Hematology, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati Children's Hospital, 3333 Burnet Avenue, MLC 7015 Cincinnati, Ohio 45229, United States of America
| | - Adolfine Hokororo
- Department of Paediatrics and Child Health, Catholic University of Health and Allied Sciences, Mwanza, United Republic of Tanzania
| | - Medard Beyanga
- Department of Laboratory Services, Bugando Medical Centre, Mwanza, United Republic of Tanzania
| | - Thad A Howard
- Division of Hematology, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati Children's Hospital, 3333 Burnet Avenue, MLC 7015 Cincinnati, Ohio 45229, United States of America
| | - Erasmus Kamugisha
- Department of Biochemistry and Molecular Biology, Catholic University of Health and Allied Sciences, Mwanza, United Republic of Tanzania
| | - Kathryn E McElhinney
- Division of Hematology, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati Children's Hospital, 3333 Burnet Avenue, MLC 7015 Cincinnati, Ohio 45229, United States of America
| | - Erius Tebuka
- Department of Pathology, Catholic University of Health and Allied Sciences, Mwanza, United Republic of Tanzania
| | - Russell E Ware
- Division of Hematology, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati Children's Hospital, 3333 Burnet Avenue, MLC 7015 Cincinnati, Ohio 45229, United States of America
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Forté S, Eng B, Verhovsek M, Soulières D, Waye JS. Microcytosis in patients with haemoglobin C trait: is α-thalassaemia trait to blame? Br J Haematol 2020; 191:e129-e131. [PMID: 32945526 DOI: 10.1111/bjh.17095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 08/17/2020] [Indexed: 11/28/2022]
Affiliation(s)
- Stéphanie Forté
- Division of Medical Oncology and Haematology, Department of Medicine, University Health Network, Toronto, Ontario, Canada.,Division of Medical Oncology and Haematology, Department of Medicine, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, Québec, Canada
| | - Barry Eng
- Hamilton Regional Laboratory Medicine Program, Hamilton Health Sciences, Hamilton, Ontario, Canada
| | - Madeleine Verhovsek
- Division of Haematology and Thromboembolism, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Denis Soulières
- Division of Medical Oncology and Haematology, Department of Medicine, Centre Hospitalier de l'Université de Montréal (CHUM), Montréal, Québec, Canada
| | - John S Waye
- Hamilton Regional Laboratory Medicine Program, Hamilton Health Sciences, Hamilton, Ontario, Canada.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
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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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Jajosky RP, Jajosky AN, Jajosky PG. ABO blood group should be considered and reported when red blood cell exchange transfusion is used to treat Plasmodiumfalciparum Malaria patients. Transfus Clin Biol 2020; 27:179-184. [PMID: 32360095 DOI: 10.1016/j.tracli.2020.03.008] [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: 11/24/2019] [Revised: 03/13/2020] [Accepted: 03/24/2020] [Indexed: 10/24/2022]
Abstract
Laboratory and epidemiologic studies have clarified how persons born with malaria-resistant red blood cells (RBCs)-like group-O, sickle-trait, and C-trait RBCs-are protected against death or severe disease due to Plasmodiumfalciparum (Pf) infection. Compared to malaria-promoting RBCs-like non-O or hemoglobin-AA RBCs-inborn RBC protection against severe Pf malaria can be profound: up to 10-fold greater. Given that "the Berlin patient" success showed patients do not have to be born with disease-resistant cells to benefit from them, why have the biologically plausible benefits of exchange transfusion (ET) of malaria-resistant RBCs not yet been evaluated? Unfortunately, a 2013 ET-for-malaria meta-analysis could not quantify the impact on mortality of ET of malaria-resistant RBCs because RBC malaria resistance variables (ABO group, hemoglobin type, enzyme levels, etc.) had not been reported in any of the ET studies used in that meta-analysis. To promote evaluation of the therapeutic impact of specific malaria-resistant RBCs, we urge clinicians to always report ABO blood group (and all other RBC malaria-resistance variables they are aware of) when they use ET to rescue Pf-infected patients. Prudent selection of donor RBCs has successfully optimized ET for sickle cell disease patients, and this precedent suggests selection of special malaria-resistant donor RBCs may optimize ET for Pf-malaria patients. Given that ET is used worldwide as a rescue adjunct, we feel it is most prudent to now assume-until proven otherwise-that considering and reporting the Pf-malaria-resistance variables of the RBCs to be transfused-at least ABO status-will help optimize ET-for-malaria.
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Affiliation(s)
- Ryan Philip Jajosky
- Emory University, Department of Pathology and Laboratory Medicine, Atlanta, GA, USA; Biconcavity Inc., Lilburn, GA, USA.
| | - Audrey N Jajosky
- Case Western Reserve University, University Hospitals Cleveland Medical Center, Department of Pathology, Cleveland, OH, USA.
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Hasan MN, Fraiwan A, An R, Alapan Y, Ung R, Akkus A, Xu JZ, Rezac AJ, Kocmich NJ, Creary MS, Oginni T, Olanipekun GM, Hassan-Hanga F, Jibir BW, Gambo S, Verma AK, Bharti PK, Riolueang S, Ngimhung T, Suksangpleng T, Thota P, Werner G, Shanmugam R, Das A, Viprakasit V, Piccone CM, Little JA, Obaro SK, Gurkan UA. Paper-based microchip electrophoresis for point-of-care hemoglobin testing. Analyst 2020; 145:2525-2542. [PMID: 32123889 DOI: 10.1039/c9an02250c] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Nearly 7% of the world's population live with a hemoglobin variant. Hemoglobins S, C, and E are the most common and significant hemoglobin variants worldwide. Sickle cell disease, caused by hemoglobin S, is highly prevalent in sub-Saharan Africa and in tribal populations of Central India. Hemoglobin C is common in West Africa, and hemoglobin E is common in Southeast Asia. Screening for significant hemoglobin disorders is not currently feasible in many low-income countries with the high disease burden. Lack of early diagnosis leads to preventable high morbidity and mortality in children born with hemoglobin variants in low-resource settings. Here, we describe HemeChip, the first miniaturized, paper-based, microchip electrophoresis platform for identifying the most common hemoglobin variants easily and affordably at the point-of-care in low-resource settings. HemeChip test works with a drop of blood. HemeChip system guides the user step-by-step through the test procedure with animated on-screen instructions. Hemoglobin identification and quantification is automatically performed, and hemoglobin types and percentages are displayed in an easily understandable, objective way. We show the feasibility and high accuracy of HemeChip via testing 768 subjects by clinical sites in the United States, Central India, sub-Saharan Africa, and Southeast Asia. Validation studies include hemoglobin E testing in Bangkok, Thailand, and hemoglobin S testing in Chhattisgarh, India, and in Kano, Nigeria, where the sickle cell disease burden is the highest in the world. Tests were performed by local users, including healthcare workers and clinical laboratory personnel. Study design, methods, and results are presented according to the Standards for Reporting Diagnostic Accuracy (STARD). HemeChip correctly identified all subjects with hemoglobin S, C, and E variants with 100% sensitivity, and displayed an overall diagnostic accuracy of 98.4% in comparison to reference standard methods. HemeChip is a versatile, mass-producible microchip electrophoresis platform that addresses a major unmet need of decentralized hemoglobin analysis in resource-limited settings.
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Affiliation(s)
- Muhammad Noman Hasan
- Case Biomanufacturing and Microfabrication Laboratory, Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio 44106, USA.
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Guan E, Tian F, Liu Z. A novel risk score model for stomach adenocarcinoma based on the expression levels of 10 genes. Oncol Lett 2020; 19:1351-1367. [PMID: 31966067 PMCID: PMC6956285 DOI: 10.3892/ol.2019.11190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 10/11/2019] [Indexed: 12/11/2022] Open
Abstract
Stomach adenocarcinoma (STAD) accounts for 95% of cases of malignant gastric cancer, which is the third leading cause of cancer-associated mortality worldwide. The pathogenesis and effective diagnosis of STAD have become popular topics for research in the previous decade. In the present study, high-throughput RNA sequencing expression profiles and clinical data from patients with STAD were obtained from The Cancer Genome Atlas database and were used as a training dataset to screen differentially expressed genes (DEGs). Prognostic DEGs were identified using univariate Cox regression analysis and were further screened by the least absolute shrinkage and selection operator regularization regression algorithm. The resulting genes were used to construct a risk score model, the validation and effectiveness evaluation of which were performed on an independent dataset downloaded from the Gene Expression Omnibus database. Stratified and functional pathway (gene set enrichment) analyses were performed on groups with different estimated prognosis. A total of 92 genes significantly associated with STAD prognosis were obtained by univariate Cox regression analysis, and 10 prognosis-associated DEGs; hemoglobin b, chromosome 4 open reading frame 48, Dickkopf WNT signaling pathway inhibitor 1, coagulation factor V, serpin family E member 1, transmembrane protein 200A, NADPH oxidase organizer 1, C-X-C motif chemokine ligand 3, mannosidase endo-α-like and tripartite motif-containing 31; were selected for the development of the risk score model. The reliability of this prognostic method was verified using a validation set, and the results of multivariate Cox analysis indicated that the risk score may serve as an independent prognostic factor. In functional DEG analysis, eight Kyoto Encyclopedia of Genes and Genomes pathways were identified to be significantly associated with STAD risk factors. Thus, the 10-gene risk score model established in the present study was regarded as credible. This risk assessment tool may help identify patients with a high risk of STAD, and the proposed prognostic mRNAs may be useful in elucidating STAD pathogenesis.
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Affiliation(s)
- Encui Guan
- Department of Gastroenterology, The Central Hospital of Linyi, Linyi, Shandong 276400, P.R. China
| | - Feng Tian
- Department of Gastroenterology, The Central Hospital of Linyi, Linyi, Shandong 276400, P.R. China
| | - Zhaoxia Liu
- Department of Gastroenterology, The Central Hospital of Linyi, Linyi, Shandong 276400, P.R. China
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El Sissy MH, Hafez AA, Moneim SEA, Eldemerdash DM. Association of the CCR5Δ 32 Mutant Genotype with Sickle Cell Disease in Egyptian Patients. Hemoglobin 2019; 43:258-263. [PMID: 31657666 DOI: 10.1080/03630269.2019.1680381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Sickle cell disease is considered the most common single base mutation in the world, with >250,000 new patients being discovered each year. It consists of a wide spectrum of clinical presentations and complications. The CCR5Δ32 is the mutant genotype of C-C chemokine receptor 5 (CCR5). It is widely distributed due to several micro organisms that target macrophages in different populations. Theoretically, CCR5Δ32 confers an advantage to sickle cell disease patients. The chronic inflammatory response is the main pathogenesis in sickle cell disease, thus, the presence of the null CCR5Δ32 mutant genotype prevents the Th1-type immune response caused by the CCR5 chemokine receptor. This study aimed to define the true incidence of the CCR5Δ32 mutant genotype and to correlate its presence with the clinical and/or the radiological findings in sickle cell disease patients. We proposed decreased morbidity and prolonged survival of sickle cell disease patients carrying the CCR5Δ32 genotype. The study showed relatively the same prevalence (5.1%) of the CCR5Δ32 mutant genotype found in 500 sickle cell disease patients when compared to 1000 healthy controls (5.0%) with the same ethnic background. Despite the near prevalence of the incidence to controls, we suggest that CCR5Δ32 is relatively beneficial to sickle cell disease patients as polymorphic patients showed uncomplicated clinical presentation in contrast to other patients without the CCR5Δ32.
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Affiliation(s)
- Maha H El Sissy
- Department of Laboratory Medicine, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Ahmed A Hafez
- Department of Laboratory Medicine, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Sherif E A Moneim
- Department of Pediatrics, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Doaa M Eldemerdash
- Department of Internal Medicine, Faculty of Medicine, Cairo University, Cairo, Egypt
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Rosenfeld LG, Bacal NS, Cuder MAM, Silva AGD, Machado ÍE, Pereira CA, Souza MDFMD, Malta DC. Prevalence of hemoglobinopathies in the Brazilian adult population: National Health Survey 2014-2015. REVISTA BRASILEIRA DE EPIDEMIOLOGIA 2019; 22Suppl 02:E190007.SUPL.2. [PMID: 31596378 DOI: 10.1590/1980-549720190007.supl.2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 02/18/2019] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE To describe the prevalence of hemoglobinopathies in the Brazilian adult population, according to laboratory tests from the National Health Survey. METHODS A descriptive study was carried out with National Health Survey laboratory data collected between 2014 and 2015. The hemoglobinopathies test was performed using the High Performance Liquid Chromatography method. The results of the individual tests were interpreted as providing normal, homozygous or heterozygous results for S, C and D hemoglobin, in addition to other possible hemoglobinopathies. Prevalence of hemoglobinopathies according to gender, skin color, region, age and schooling was estimated. RESULTS Hemoglobinopathies were present in 3.7% of the population. The main ones were the sickle cell trait (2.49%), thalassemia minor (0.30%) and suspected thalassemia major (0.80%). In relation to the sickle cell trait and suspected thalassemia major, there was a statistically significant difference for the skin color variable (p<0.05). The prevalences found for sickle cell trait according to skin color was: 4.1% among dark-skinned blacks, 3.6% among light-skinned blacks, 1.2% among whites, and 1.7% among others. CONCLUSION The most prevalent hemoglobinopathies were the sickle cell trait and minor thalassemia, and were predominate among light- and dark-skinned black people. The study helps in identifying hemoglobinopathies and in genetic counseling in pre-conception.
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Affiliation(s)
| | | | | | - Alanna Gomes da Silva
- Programa de Pós Graduação em Enfermagem, Escola de Enfermagem, Universidade Federal de Minas Gerais - Belo Horizonte (MG), Brasil
| | - Ísis Eloah Machado
- Programa de Pós Graduação em Enfermagem, Escola de Enfermagem, Universidade Federal de Minas Gerais - Belo Horizonte (MG), Brasil
| | - Cimar Azereido Pereira
- Diretoria de Pesquisas, Instituto Brasileiro de Geografia e Estatística - Rio de Janeiro (RJ), Brasil
| | - Maria de Fátima Marinho de Souza
- Programa de Pós-Graduação do Departamento de Medicina Preventiva, Faculdade de Medicina da Universidade de Minas Gerais - Belo Horizonte (MG), Brasil
| | - Deborah Carvalho Malta
- Departamento de Enfermagem Materno Infantil e Saúde Pública, Escola de Enfermagem, Universidade Federal de Minas Gerais - Belo Horizonte (MG), Brasil
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Prevalence of inherited blood disorders and associations with malaria and anemia in Malawian children. Blood Adv 2019; 2:3035-3044. [PMID: 30425067 DOI: 10.1182/bloodadvances.2018023069] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 09/10/2018] [Indexed: 12/23/2022] Open
Abstract
In sub-Saharan Africa, inherited causes of anemia are common, but data are limited regarding the geographical prevalence and coinheritance of these conditions and their overall contributions to childhood anemia. To address these questions in Malawi, we performed a secondary analysis of the 2015-2016 Malawi Micronutrient Survey, a nationally and regionally representative survey that estimated the prevalence of micronutrient deficiencies and evaluated both inherited and noninherited determinants of anemia. Children age 6 to 59 months were sampled from 105 clusters within the 2015-2016 Malawi Demographic Health Survey. Hemoglobin, ferritin, retinol binding protein, malaria, and inflammatory biomarkers were measured from venous blood. Molecular studies were performed using dried blood spots to determine the presence of sickle cell disease or trait, α-thalassemia trait, and glucose-6-phosphate dehydrogenase (G6PD) deficiency. Of 1279 eligible children, 1071 were included in the final analysis. Anemia, iron deficiency, and malaria were common, affecting 30.9%, 21.5%, and 27.8% of the participating children, respectively. α-Thalassemia trait was common (>40% of children demonstrating deletion of 1 [33.1%] or 2 [10.0%] α-globin genes) and associated with higher prevalence of anemia (P < .001). Approximately 20% of males had G6PD deficiency, which was associated with a 1.0 g/dL protection in hemoglobin decline during malaria infection (P = .02). These data document that inherited blood disorders are common and likely play an important role in the prevalence of anemia and malaria in Malawian children.
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Damena D, Denis A, Golassa L, Chimusa ER. Genome-wide association studies of severe P. falciparum malaria susceptibility: progress, pitfalls and prospects. BMC Med Genomics 2019; 12:120. [PMID: 31409341 PMCID: PMC6693204 DOI: 10.1186/s12920-019-0564-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Accepted: 07/29/2019] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND P. falciparum malaria has been recognized as one of the prominent evolutionary selective forces of human genome that led to the emergence of multiple host protective alleles. A comprehensive understanding of the genetic bases of severe malaria susceptibility and resistance can potentially pave ways to the development of new therapeutics and vaccines. Genome-wide association studies (GWASs) have recently been implemented in malaria endemic areas and identified a number of novel association genetic variants. However, there are several open questions around heritability, epistatic interactions, genetic correlations and associated molecular pathways among others. Here, we assess the progress and pitfalls of severe malaria susceptibility GWASs and discuss the biology of the novel variants. RESULTS We obtained all severe malaria susceptibility GWASs published thus far and accessed GWAS dataset of Gambian populations from European Phenome Genome Archive (EGA) through the MalariaGen consortium standard data access protocols. We noticed that, while some of the well-known variants including HbS and ABO blood group were replicated across endemic populations, only few novel variants were convincingly identified and their biological functions remain to be understood. We estimated SNP-heritability of severe malaria at 20.1% in Gambian populations and showed how advanced statistical genetic analytic methods can potentially be implemented in malaria susceptibility studies to provide useful functional insights. CONCLUSIONS The ultimate goal of malaria susceptibility study is to discover a novel causal biological pathway that provide protections against severe malaria; a fundamental step towards translational medicine such as development of vaccine and new therapeutics. Beyond singe locus analysis, the future direction of malaria susceptibility requires a paradigm shift from single -omics to multi-stage and multi-dimensional integrative functional studies that combines multiple data types from the human host, the parasite, the mosquitoes and the environment. The current biotechnological and statistical advances may eventually lead to the feasibility of systems biology studies and revolutionize malaria research.
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Affiliation(s)
- Delesa Damena
- Division of Human Genetics, Department of Pathology, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Private Bag, Rondebosch, Cape Town, 7700 South Africa
| | - Awany Denis
- Division of Human Genetics, Department of Pathology, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Private Bag, Rondebosch, Cape Town, 7700 South Africa
| | - Lemu Golassa
- Aklilu Lema Institute of Pathobiology, Addis Ababa University, PO box 1176, Addis Ababa, Ethiopia
| | - Emile R. Chimusa
- Division of Human Genetics, Department of Pathology, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Private Bag, Rondebosch, Cape Town, 7700 South Africa
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Banza MI, Mulefu JP, Lire LI, N'dwala YTB, Tshiamala IB, Cabala VDPK. [Digestives diseases associated to sickle cell anemia in Lubumbashi: epidemiological and clinical aspects]. Pan Afr Med J 2019; 33:253. [PMID: 31692839 PMCID: PMC6814946 DOI: 10.11604/pamj.2019.33.253.18017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Accepted: 07/07/2019] [Indexed: 02/06/2023] Open
Abstract
Introduction la drépanocytose est une maladie génétique de transmission autosomique liée à une anomalie de structure de l'hémoglobine qui aboutit à la formation de l'hémoglobine S. Le but de notre étude est de colliger les cas de pathologies digestives rencontrées chez les drépanocytaires de Lubumbashi et d'en ressortir les caractéristiques épidémiologiques et cliniques. Méthodes il s'agit d'une étude rétrospective, descriptive transversale réalisée au Centre de Recherche de la Drépanocytose de Lubumbashi. Elle a concerné les dossiers des patients suivi pour drépanocytose ayant présenté une pathologie digestive au cours de notre période de 3 ans (de janvier 2015 à décembre 2017). Le recueil des données s'est fait grâce à une fiche d'enquête comportant différents paramètres d'étude comprenant: l'âge, le sexe, le motif de consultation, le diagnostic, le type de crise vaso-occlusive, les examens paracliniques réalisés, le traitement à l'hydroxyurée. Résultats nous avons colligé 206 dossiers (N=206) des patients drépanocytaires ayant fait une pathologie digestive sur un total de 403 dossiers examinés, ce qui représente une fréquence de 51,11% des pathologies digestives chez les drépanocytaires. Les 2 sexes sont représentés avec une légère prédominance féminine (51,94%) et un sexe ratio H/F: 0,92. La tranche d'âge la plus représentée est celle comprise entre 1 et 6 ans (32,52%), la moyenne d'âge: 11,8ans; écart-type: 21,9; âges extrêmes: 13 mois et 38 ans. Le motif de consultation est dominé par la fièvre (60,67%), la douleur abdominale (44,66%) et les troubles digestifs (30,09%). Les crises vaso-occlusives abdominales sont retrouvées chez 65 patients (31,55%) parmi lesquels 36 patients ont présenté 1 seule crise, 24 en ont présenté 2 et 5 patients en ont présenté 3. Les pathologies intestinales étaient présentes chez 121 patients (69,41%) dominées par la parasitose intestinale (retrouvée chez 58 patients dont l'examen des selles a mis en évidence 4 parasites: le Yersinia enterocolitis, l'entamoeba histolytica, le Giardia intestinalis et le clostridium difficile); les pathologies gastriques retrouvées chez 105 patients (50,97%) reparties en ulcère gastro-duodénal (45 patients) et gastrite (60 patients); la pathologie vésiculo-biliaire présente chez 40 patients (19,41%) comprenant la lithiase vésiculaire sans cholécystite 32 patients, la cholécystite lithiasique 5 patients et 3 cas de lithiase de la voie biliaire principale; 1 seul cas de pancréatite aigue diagnostiquée. Les pathologies associées les plus retrouvées dans notre étude sont respiratoires avec 169 cas (82,03%), oto-rhino-laryngologiques avec 157 cas (76,21%), les crises vaso-occlusives osseuses (146 cas soit 70,87%), pathologies uro-génitales avec 64 cas (31,06%) et le paludisme chez 51 patients (24,75%). Les atteintes spléniques et hépatiques ont constitué chacun 47 cas (22,81%) et 18 cas (8,73%). L'échographie a était demandé chez 79 patients mais seulement 31 d'entre-eux l'ont réalisé, faute de moyen financier car il coute sur place 20 dollars américains. En cas de splénomégalie cliniquement évidente, le corps de Jolly a été demandé chez 23 patients mais seulement 2 patients l'ont réalisé vu qu'il coute 10 dollars américains. L'hémogramme de routine fait de l'hémoglobine, hématocrite, bilan inflammatoire et la goutte épaisse a été réalisée chez tous nos patients mais le bilan hépatique, les examens des selles, des urines sont préconisés en fonction de la plainte. Sur nos 206 patients, 60 seulement d'entre eux étaient sous traitement à l'hydroxyurée (29,16%). Conclusion les pathologies digestives sont fréquentes chez les drépanocytaires et représentent quasiment la moitié de l'effectif drépanocytaire. Malheureusement, la meilleure prise en charge reste butée à la pauvreté manifeste de la population limitants les examens paracliniques très utiles dans la pathologie digestive rencontrée chez le drépanocytaire.
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Affiliation(s)
- Manix Ilunga Banza
- Université de Lubumbashi, Faculté de Médecine, Département de Chirurgie, Cliniques Universitaires de Lubumbashi, Lubumbashi, République Démocratique du Congo
| | - Jules Panda Mulefu
- Université de Lubumbashi, Faculté de Médecine, Département de Chirurgie, Cliniques Universitaires de Lubumbashi, Lubumbashi, République Démocratique du Congo
| | - Lire Ipani Lire
- Université de Lubumbashi, Faculté de Médecine, Département de Chirurgie, Cliniques Universitaires de Lubumbashi, Lubumbashi, République Démocratique du Congo
| | - Yannick Tietie Ben N'dwala
- Université de Lubumbashi, Faculté de Médecine, Département de Chirurgie, Cliniques Universitaires de Lubumbashi, Lubumbashi, République Démocratique du Congo
| | - Israel Badypwyla Tshiamala
- Université de Lubumbashi, Faculté de Médecine, Département de Chirurgie, Cliniques Universitaires de Lubumbashi, Lubumbashi, République Démocratique du Congo
| | - Vincent de Paul Kaoma Cabala
- Université de Lubumbashi, Faculté de Médecine, Département de Chirurgie, Cliniques Universitaires de Lubumbashi, Lubumbashi, République Démocratique du Congo
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Hockham C, Ekwattanakit S, Bhatt S, Penman BS, Gupta S, Viprakasit V, Piel FB. Estimating the burden of α-thalassaemia in Thailand using a comprehensive prevalence database for Southeast Asia. eLife 2019; 8:40580. [PMID: 31120421 PMCID: PMC6533055 DOI: 10.7554/elife.40580] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 05/01/2019] [Indexed: 12/27/2022] Open
Abstract
Severe forms of α-thalassaemia, haemoglobin H disease and haemoglobin Bart’s hydrops fetalis, are an important public health concern in Southeast Asia. Yet information on the prevalence, genetic diversity and health burden of α-thalassaemia in the region remains limited. We compiled a geodatabase of α-thalassaemia prevalence and genetic diversity surveys and, using geostatistical modelling methods, generated the first continuous maps of α-thalassaemia mutations in Thailand and sub-national estimates of the number of newborns with severe forms in 2020. We also summarised the current evidence-base for α-thalassaemia prevalence and diversity for the region. We estimate that 3595 (95% credible interval 1,717–6,199) newborns will be born with severe α-thalassaemia in Thailand in 2020, which is considerably higher than previous estimates. Accurate, fine-scale epidemiological data are necessary to guide sustainable national and regional health policies for α-thalassaemia management. Our maps and newborn estimates are an important first step towards this aim. Editorial note: This article has been through an editorial process in which the authors decide how to respond to the issues raised during peer review. The Reviewing Editor's assessment is that all the issues have been addressed (see decision letter).
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Affiliation(s)
- Carinna Hockham
- The George Institute for Global Health, Sydney, Australia.,Evolutionary Ecology of Infectious Disease Group, Department of Zoology, University of Oxford, Oxford, United Kingdom
| | - Supachai Ekwattanakit
- Thalassaemia Centre, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Samir Bhatt
- Department of Infectious Disease Epidemiology, School of Public Health, Imperial College, London, United Kingdom
| | - Bridget S Penman
- Warwick Infectious Disease Epidemiology Research, School of Life Sciences, Warwick University, Coventry, United Kingdom
| | - Sunetra Gupta
- Evolutionary Ecology of Infectious Disease Group, Department of Zoology, University of Oxford, Oxford, United Kingdom
| | - Vip Viprakasit
- Thalassaemia Centre, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.,Department of Paediatrics, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Frédéric B Piel
- MRC-PHE Centre for Environment and Health, Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom
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Asadi F, Rasouli Ghahfarokhi SM, Talebi F. Prevalence of Hemoglobin Mutations and Hemoglobinopathies in Masjed Soleiman County, Southeastern Iran. MEDICAL LABORATORY JOURNAL 2019. [DOI: 10.29252/mlj.13.2.48] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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Grignard L, Mair C, Curry J, Mahey L, Bastiaens GJH, Tiono AB, Okebe J, Coulibaly SA, Gonçalves BP, Affara M, Ouédraogo A, Bougouma EC, Sanou GS, Nébié I, Lanke KHW, Sirima SB, d'Alessandro U, Clark TG, Campino S, Bousema T, Drakeley C. Bead-based assays to simultaneously detect multiple human inherited blood disorders associated with malaria. Malar J 2019; 18:14. [PMID: 30665411 PMCID: PMC6341711 DOI: 10.1186/s12936-019-2648-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 01/12/2019] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Glucose-6-phosphate dehydrogenase deficiency (G6PDd), haemoglobin C (HbC) and S (HbS) are inherited blood disorders (IBD) common in populations in malaria endemic areas. All are associated to some degree with protection against clinical malaria whilst additionally G6PDd is associated with haemolysis following treatment with 8-aminoquinolines. Measuring the prevalence of these inherited blood disorders in affected populations can improve understanding of disease epidemiology. Current methodologies in epidemiological studies commonly rely on individual target amplification and visualization; here a method is presented to simultaneously detect the polymorphisms and that can be expanded to include other single nucleotide polymorphisms (SNPs) of interest. METHODS Human DNA from whole blood samples was amplified in a novel, multiplex PCR reaction and extended with SNP-specific probes in an allele specific primer extension (ASPE) to simultaneously detect four epidemiologically important human markers including G6PD SNPs (G202A and A376G) and common haemoglobin mutations (HbS and HbC). The products were hybridized to magnetic beads and the median fluorescence intensity (MFI) was read on MAGPIX® (Luminex corp.). Genotyping data was compared to phenotypical data generated by flow cytometry and to established genotyping methods. RESULTS Seventy-five samples from Burkina Faso (n = 75/78, 96.2%) and 58 samples from The Gambia (n = 58/61, 95.1%) had a G6PD and a HBB genotype successfully assigned by the bead-based assay. Flow cytometry data available for n = 61 samples further supported the concordance between % G6PD normal/deficient cells and genotype. CONCLUSIONS The bead based assay compares well to alternative measures of genotyping and phenotyping for G6PD. The screening is high throughput, adaptable to inclusion of multiple targets of interest and easily standardized.
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Affiliation(s)
- Lynn Grignard
- Department of Immunology and Infection, London School of Hygiene & Tropical Medicine, London, UK.
| | - Catherine Mair
- Department of Immunology and Infection, London School of Hygiene & Tropical Medicine, London, UK
| | | | | | - Guide J H Bastiaens
- Department of Medical Microbiology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Alfred B Tiono
- Department of Biomedical Sciences, Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - Joseph Okebe
- Disease Control & Elimination Theme, Medical Research Council Unit at London School of Hygiene and Tropical Medicine, Fajara, The Gambia
| | - Sam A Coulibaly
- Department of Biomedical Sciences, Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - Bronner P Gonçalves
- Department of Immunology and Infection, London School of Hygiene & Tropical Medicine, London, UK
| | - Muna Affara
- Disease Control & Elimination Theme, Medical Research Council Unit at London School of Hygiene and Tropical Medicine, Fajara, The Gambia
| | - Alphonse Ouédraogo
- Department of Biomedical Sciences, Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - Edith C Bougouma
- Department of Biomedical Sciences, Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - Guillaume S Sanou
- Department of Biomedical Sciences, Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - Issa Nébié
- Department of Biomedical Sciences, Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - Kjerstin H W Lanke
- Department of Medical Microbiology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Sodiomon B Sirima
- Department of Biomedical Sciences, Centre National de Recherche et de Formation sur le Paludisme, Ouagadougou, Burkina Faso
| | - Umberto d'Alessandro
- Disease Control & Elimination Theme, Medical Research Council Unit at London School of Hygiene and Tropical Medicine, Fajara, The Gambia
- Department of Disease Control, London School of Hygiene and Tropical Medicine, London, UK
| | - Taane G Clark
- Department of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, London, UK
- Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, UK
| | - Susana Campino
- Department of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, London, UK
| | - Teun Bousema
- Department of Immunology and Infection, London School of Hygiene & Tropical Medicine, London, UK
- Department of Medical Microbiology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Chris Drakeley
- Department of Immunology and Infection, London School of Hygiene & Tropical Medicine, London, UK
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Mugeni R, Aduwo JY, Briker SM, Hormenu T, Sumner AE, Horlyck-Romanovsky MF. A Review of Diabetes Prediction Equations in African Descent Populations. Front Endocrinol (Lausanne) 2019; 10:663. [PMID: 31632346 PMCID: PMC6779831 DOI: 10.3389/fendo.2019.00663] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 09/12/2019] [Indexed: 12/27/2022] Open
Abstract
Background: Predicting undiagnosed diabetes is a critical step toward addressing the diabetes epidemic in populations of African descent worldwide. Objective: To review characteristics of equations developed, tested, or modified to predict diabetes in African descent populations. Methods: Using PubMed, Scopus, and Embase databases, a scoping review yielded 585 research articles. After removal of duplicates (n = 205), 380 articles were reviewed. After title and abstract review 328 articles did not meet inclusion criteria and were excluded. Fifty-two articles were retained. However, full text review revealed that 44 of the 52 articles did not report findings by AROC or C-statistic in African descent populations. Therefore, eight articles remained. Results: The 8 articles reported on a total of 15 prediction equation studies. The prediction equations were of two types. Prevalence prediction equations (n = 9) detected undiagnosed diabetes and were based on non-invasive variables only. Non-invasive variables included demographics, blood pressure and measures of body size. Incidence prediction equations (n = 6) predicted risk of developing diabetes and used either non-invasive variables or both non-invasive and invasive. Invasive variables required blood tests and included fasting glucose, high density lipoprotein-cholesterol (HDL), triglycerides (TG), and A1C. Prevalence prediction studies were conducted in the United States, Africa and Europe. Incidence prediction studies were conducted only in the United States. In all these studies, the performance of diabetes prediction equations was assessed by area under the receiver operator characteristics curve (AROC) or the C-statistic. Therefore, we evaluated the efficacy of these equations based on standard criteria, specifically discrimination by either AROC or C-statistic were defined as: Poor (0.50 - 0.69); Acceptable (0.70 - 0.79); Excellent (0.80 - 0.89); or Outstanding (0.90 - 1.00). Prediction equations based only on non-invasive variables reported to have poor to acceptable detection of diabetes with AROC or C-statistic 0.64 - 0.79. In contrast, prediction equations which were based on both non-invasive and invasive variables had excellent diabetes detection with AROC or C-statistic 0.80 - 0.82. Conclusion: Equations which use a combination of non-invasive and invasive variables appear to be superior in the prediction of diabetes in African descent populations than equations that rely on non-invasive variables alone.
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Affiliation(s)
- Regine Mugeni
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
- National Institute of Minority Health and Health Disparities, National Institutes of Health, Bethesda, MD, United States
| | - Jessica Y. Aduwo
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Sara M. Briker
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Thomas Hormenu
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Anne E. Sumner
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
- National Institute of Minority Health and Health Disparities, National Institutes of Health, Bethesda, MD, United States
| | - Margrethe F. Horlyck-Romanovsky
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
- Brooklyn College, City University of New York, Brooklyn, NY, United States
- *Correspondence: Margrethe F. Horlyck-Romanovsky
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Briker SM, Aduwo JY, Mugeni R, Horlyck-Romanovsky MF, DuBose CW, Mabundo LS, Hormenu T, Chung ST, Ha J, Sherman A, Sumner AE. A1C Underperforms as a Diagnostic Test in Africans Even in the Absence of Nutritional Deficiencies, Anemia and Hemoglobinopathies: Insight From the Africans in America Study. Front Endocrinol (Lausanne) 2019; 10:533. [PMID: 31447780 PMCID: PMC6692432 DOI: 10.3389/fendo.2019.00533] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 07/18/2019] [Indexed: 12/16/2022] Open
Abstract
Introduction: To improve detection of undiagnosed diabetes in Africa, there is movement to replace the OGTT with A1C. The performance of A1C in the absence of hemoglobin-related micronutrient deficiencies, anemia and heterozygous hemoglobinopathies is unknown. Therefore, we determined in 441 African-born blacks living in America [male: 65% (281/441), age: 38 ± 10 y (mean ± SD), BMI: 27.5 ± 4.4 kg/m2] (1) nutritional and hematologic profiles and (2) glucose tolerance categorization by OGTT and A1C. Methods: Hematologic and nutritional status were assessed. Hemoglobin <11 g/dL occurred in 3% (11/441) of patients and led to exclusion. A1C and OGTT were performed in the remaining 430 participants. ADA thresholds for A1C and OGTT were used. Diagnosis by A1C required meeting either A1C-alone or A1C&OGTT criteria. Diagnosis by OGTT-alone required detection by OGTT and not A1C. Results: Hemoglobin, mean corpuscular volume and red blood cell distribution width were 14.0 ± 1.3 g/dL, 85.5 ± 5.3 fL, and 13.2 ± 1.2% respectively. B12, folate, and iron deficiency occurred in 1% (5/430), 0% (0/430), and 4% (12/310), respectively. Heterozygous hemoglobinopathy prevalence was 18% (78/430). Overall, diabetes prevalence was 7% (32/430). A1C detected diabetes in 32% (10/32) but OGTT-alone detected 68% (22/32). Overall prediabetes prevalence was 41% (178/430). A1C detected 57% (102/178) but OGTT-alone identified 43% (76/178). After excluding individuals with heterozygous hemoglobinopathies, the rate of missed diagnosis by A1C of abnormal glucose tolerance did not change (OR: 0.99, 95% CI: 0.61, 1.62). Conclusions: In nutritionally replete Africans without anemia or heterozygous hemoglobinopathy, if only A1C is used, ~60% with diabetes and ~40% with prediabetes would be undiagnosed. Clinical Trial Registration:: www.ClinicalTrials.gov, Identifier: NCT00001853.
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Affiliation(s)
- Sara M. Briker
- Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Jessica Y. Aduwo
- Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Regine Mugeni
- Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
- National Institute of Minority Health and Health Disparities, National Institutes of Health, Bethesda, MD, United States
| | - Margrethe F. Horlyck-Romanovsky
- Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Christopher W. DuBose
- Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Lilian S. Mabundo
- Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Thomas Hormenu
- Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Stephanie T. Chung
- Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Joon Ha
- Laboratory of Biological Modeling Medicine, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Arthur Sherman
- Laboratory of Biological Modeling Medicine, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Anne E. Sumner
- Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
- National Institute of Minority Health and Health Disparities, National Institutes of Health, Bethesda, MD, United States
- *Correspondence: Anne E. Sumner
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Diallo DA, Guindo A, Touré BA, Sarro YS, Sima M, Tessougué O, Baraika MA, Guindo P, Traoré M, Diallo M, Dorie A. [Targeted newborn screening for sickle-cell anemia: Sickling test (Emmel test) boundaries in the prenatal assessment in West African area]. Rev Epidemiol Sante Publique 2018; 66:181-185. [PMID: 29625861 DOI: 10.1016/j.respe.2018.02.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 12/11/2017] [Accepted: 02/21/2018] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Newborn screening for sickle cell anemia is necessary in Africa where the disease is more frequent. Hemoglobin electrophoresis is used for screening, but is limited by a high cost and difficult access. Sickling test (Emmel test), which is more affordable and technically more accessible, is often requested for prenatal assessment of pregnant women in West African areas to reserve screening for newborns from mothers in whom the positive sickling test attests the presence of hemoglobin S. This study aims to evaluate the number of undetected sickle cell anemia newborns by a screening policy targeting only newborns from mothers in whom a sickling test would have been positive. METHODS From 2010 to 2012, in Bamako, Mali, West Africa, 2489 newborns were routinely screened for sickle cell anemia at the umbilical cord or heel by isoelectrofocusing and, if necessary, by high-performance liquid chromatography. These newborns were born from 2420 mothers whose hemoglobin was studied by isoelectrofocusing. The data was recorded and processed using Excel software version 14.0.0. We calculated the frequency of the sickle cell gene in mothers and newborns as well as the number of SCA newborns from heterozygous or C homozygous mothers. RESULTS Of the 2489 newborns, 16 had sickle cell anemia (6 SS and 10 SC); 198 had the sickle cell trait; 139 were AC and 1 was CC. Of the 10 newborns with SC profile, 3 were born from mothers not carrying the S gene but the C gene of hemoglobin and in which an Emmel test would have been negative. CONCLUSION Targeted newborn screening, based on the results of sickling test in pregnant women, would misdiagnose more than one of six sickle cell anemia newborns who would not benefit from early care. Cost-effectiveness studies of routine newborn screening for sickle cell anemia should lead to a better screening strategy in contexts where hemoglobin S and other hemoglobin defect genes coexist.
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Affiliation(s)
- D A Diallo
- Centre de recherche et de lutte contre la drépanocytose (CRLD), Point G, Commune III, 03 BP : 186 Bko 03, Bamako, Mali.
| | - A Guindo
- Centre de recherche et de lutte contre la drépanocytose (CRLD), Point G, Commune III, 03 BP : 186 Bko 03, Bamako, Mali
| | - B A Touré
- Centre de recherche et de lutte contre la drépanocytose (CRLD), Point G, Commune III, 03 BP : 186 Bko 03, Bamako, Mali
| | - Y S Sarro
- Centre de recherche et de lutte contre la drépanocytose (CRLD), Point G, Commune III, 03 BP : 186 Bko 03, Bamako, Mali
| | - M Sima
- Service de gynécologie et d'obstétrique, CHU du Point G, BP : 333 Bamako, Mali
| | - O Tessougué
- Centre de recherche et de lutte contre la drépanocytose (CRLD), Point G, Commune III, 03 BP : 186 Bko 03, Bamako, Mali
| | - M A Baraika
- Centre de recherche et de lutte contre la drépanocytose (CRLD), Point G, Commune III, 03 BP : 186 Bko 03, Bamako, Mali
| | - P Guindo
- Centre de recherche et de lutte contre la drépanocytose (CRLD), Point G, Commune III, 03 BP : 186 Bko 03, Bamako, Mali
| | - M Traoré
- Centre de santé de référence de la Commune V, Bamako, Mali
| | - M Diallo
- Centre de recherche et de lutte contre la drépanocytose (CRLD), Point G, Commune III, 03 BP : 186 Bko 03, Bamako, Mali
| | - A Dorie
- Centre de recherche et de lutte contre la drépanocytose (CRLD), Point G, Commune III, 03 BP : 186 Bko 03, Bamako, Mali
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Abstract
Sickle cell disease (SCD) is a group of inherited disorders caused by mutations in HBB, which encodes haemoglobin subunit β. The incidence is estimated to be between 300,000 and 400,000 neonates globally each year, the majority in sub-Saharan Africa. Haemoglobin molecules that include mutant sickle β-globin subunits can polymerize; erythrocytes that contain mostly haemoglobin polymers assume a sickled form and are prone to haemolysis. Other pathophysiological mechanisms that contribute to the SCD phenotype are vaso-occlusion and activation of the immune system. SCD is characterized by a remarkable phenotypic complexity. Common acute complications are acute pain events, acute chest syndrome and stroke; chronic complications (including chronic kidney disease) can damage all organs. Hydroxycarbamide, blood transfusions and haematopoietic stem cell transplantation can reduce the severity of the disease. Early diagnosis is crucial to improve survival, and universal newborn screening programmes have been implemented in some countries but are challenging in low-income, high-burden settings.
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Wirth JP, Ansumana R, Woodruff BA, Koroma AS, Hodges MH. Association between sickle cell and β-thalassemia genes and hemoglobin concentration and anemia in children and non-pregnant women in Sierra Leone: ancillary analysis of data from Sierra Leone's 2013 National Micronutrient Survey. BMC Res Notes 2018; 11:43. [PMID: 29343300 PMCID: PMC5773034 DOI: 10.1186/s13104-018-3143-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 01/09/2018] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE By measuring the associations between the presence of sickle cell and β-thalassemia genes, we assessed the extent to which these hemoglobinopathies contribute to the high prevalence of anemia observed in preschool-aged children and women of reproductive age in Sierra Leone. RESULTS The prevalence of anemia was statistically significantly higher in children with homozygous sickle cell genes (HbSS) than in children with normal hemoglobin genes (HbAA or HbAC), but there was no difference in anemia prevalence in those with heterozygous sickle cell trait (HbAS or HbSC) compared with those with normal hemoglobin genes. In women, there was no difference in anemia prevalence by sickle cell status. In both children and women, there was no difference in the anemia prevalence for individuals with or without the β-thalassemia gene. For both sickle cell and β-thalassemia, there was no significant difference in hemoglobin concentrations by sickle cell or β-thalassemia status. Anemia prevalence was higher in children and women with homozygous sickle cell (HbSS). However, as the prevalence of HbSS children (5.4%) and women (1.6%) was quite small, it is unlikely that these hemoglobinopathies substantially contributed to the high anemia prevalence found in the 2013 national micronutrient survey.
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Affiliation(s)
| | - Rashid Ansumana
- Mercy Hospital Research Laboratory, Kulanda Town, Bo, Sierra Leone.
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Mukinayi BM, Kalenda DK, Mbelu S, Gulbis B. [Awareness and attitudes of 50 congolese families affected by sickle cell disease: a local survey]. Pan Afr Med J 2018; 29:24. [PMID: 29875906 PMCID: PMC5987149 DOI: 10.11604/pamj.2018.29.24.12276] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 12/11/2017] [Indexed: 11/11/2022] Open
Abstract
Introduction Sickle cell disease is a very common disease in the Democratic Republic of the Congo, but it is poorly known despite having an impact on the morbi-mortality. Our study aimed to evaluate the extent of awareness and attitudes of families affected by sickle cell disease as well as the impact of this disease in their daily lives. Methods We conducted a cross-sectional study of a unique non-random sampling from 50 families affected by sickle cell disease in Mbujimayi, Democratic Republic of the Congo, from 15 June to 15 August 2015. Participants were interviewed using a standardized questionnaire. Results This study focuses on 50 families affected by sickle cell disease; medical characteristics were found only in first children affected by sickle cell disease in each household. Less than 10% of families had minimally ill children. Fifty families were interviewed, of whom 22 had more than one child with sickle cell disease. The average age at diagnosis was 1 years. Diagnosis was based on clinical examination in 42% (21) of cases. Each first child affected by sickle cell disease had an average of 3.4 crises per year, 4 episodes of fever per year, received an average of 1.9 transfusions per year and was hospitalized an average of 3 times per year. Thirty-one families (62%) didn't have sufficient monthly income to help their children to manage sickle cell disese, 48 (96%) families hoped that a reference sickle cell centre would be established in Mbujimayi and 47 (94%) would accept to subscribe to health insurance if the annual amount were between $50 and $100. Conclusion The extent of awareness among families directly affected by sickle cell disease in Mbujimayi, Democratic Republic of the Congo, is low. This has a direct impact on the management of children with sickle cell disease. The socioeconomic status of these families is also a factor which should be taken into account. The establishement of a reference center and the possibility to fix an annual amount for the treatment of patients would be a strategic approach to implement the awareness and the attitudes of families in relation to this disease having a direct impact on the morbi-mortality of patients.
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Affiliation(s)
- Benoît Mbiya Mukinayi
- Faculté de Médecine, Université de Mbujimayi, Mbujimayi, République Démocratique du Congo
| | - Didier Kalombo Kalenda
- Faculté de Médecine, Université de Mbujimayi, Mbujimayi, République Démocratique du Congo
| | - Stéphanie Mbelu
- Faculté de Médecine, Université de Mbujimayi, Mbujimayi, République Démocratique du Congo
| | - Béatrice Gulbis
- Hôpital Erasme, Université Libre de Bruxelles, Bruxelles, Belgique
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47
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Utumatwishima JN, Chung ST, Bentley AR, Udahogora M, Sumner AE. Reversing the tide - diagnosis and prevention of T2DM in populations of African descent. Nat Rev Endocrinol 2018; 14:45-56. [PMID: 29052590 DOI: 10.1038/nrendo.2017.127] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Populations of African descent are at the forefront of the worldwide epidemic of type 2 diabetes mellitus (T2DM). The burden of T2DM is amplified by diagnosis after preventable complications of the disease have occurred. Earlier detection would result in a reduction in undiagnosed T2DM, more accurate statistics, more informed resource allocation and better health. An underappreciated factor contributing to undiagnosed T2DM in populations of African descent is that screening tests for hyperglycaemia, specifically, fasting plasma glucose and HbA1c, perform sub-optimally in these populations. To offset this problem, combining tests or adding glycated albumin (a nonfasting marker of glycaemia), might be the way forward. However, differences in diet, exercise, BMI, environment, gene-environment interactions and the prevalence of sickle cell trait mean that neither diagnostic tests nor interventions will be uniformly effective in individuals of African, Caribbean or African-American descent. Among these three populations of African descent, intensive lifestyle interventions have been reported in only the African-American population, in which they have been found to provide effective primary prevention of T2DM but not secondary prevention. Owing to a lack of health literacy and poor glycaemic control in Africa and the Caribbean, customized lifestyle interventions might achieve both secondary and primary prevention. Overall, diagnosis and prevention of T2DM requires innovative strategies that are sensitive to the diversity that exists within populations of African descent.
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Affiliation(s)
- Jean N Utumatwishima
- Section on Ethnicity and Health, Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health (NIH), 9000 Rockville Pike, Bethesda, Maryland 20892, USA
| | - Stephanie T Chung
- Section on Ethnicity and Health, Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health (NIH), 9000 Rockville Pike, Bethesda, Maryland 20892, USA
| | - Amy R Bentley
- Center for Research on Genomics and Global Health, National Human Genome Research Institute, National Institutes of Health (NIH), 9000 Rockville Pike, Bethesda, Maryland 20892, USA
| | - Margaret Udahogora
- Dietetics Program, University of Maryland, College Park, 0112 Skinner Building, Office 0125 Skinner Building, College Park, Maryland 20742, USA
| | - Anne E Sumner
- Section on Ethnicity and Health, Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health (NIH), 9000 Rockville Pike, Bethesda, Maryland 20892, USA
- National Institute of Minority Health and Health Disparities, National Institutes of Health (NIH), 9000 Rockville Pike, Bethesda, Maryland 20892, USA
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Gonçalves BP, Sagara I, Coulibaly M, Wu Y, Assadou MH, Guindo A, Ellis RD, Diakite M, Gabriel E, Prevots DR, Doumbo OK, Duffy PE. Hemoglobin variants shape the distribution of malaria parasites in human populations and their transmission potential. Sci Rep 2017; 7:14267. [PMID: 29079846 PMCID: PMC5660173 DOI: 10.1038/s41598-017-14627-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 09/07/2017] [Indexed: 01/01/2023] Open
Abstract
Hemoglobin variants C and S protect against severe malaria but their influence on parameters not directly linked to disease severity such as gametocyte carriage and infection chronicity is less well understood. To assess whether these infection-related phenotypes depend on the host hemoglobin genotype, we followed 500 Malian individuals over 1–2 years and determined their parasitological status during monthly visits and incidental clinical episodes. While adults heterozygous for hemoglobin S mutation were less often parasitemic compared to AA adults (odds ratio [OR] 0.50 95% confidence interval [CI] 0.31–0.79, P = 0.003), schoolchildren (but not toddlers or adults) with AC genotype carried parasites, including gametocytes, more often than their AA counterparts (OR 3.01 95% CI 1.38–6.57, P = 0.006). AC children were also likelier to be parasite-positive during the dry season, suggesting longer infections, and were more infectious in mosquito skin feeding assays than AA children. Notably, AC school-aged children, who comprise ~5% of the population, harbor a third of infections with patent gametocytes between May and August, when transmission transitions from very low to intense. These findings indicate that schoolchildren with hemoglobin C mutation might contribute disproportionately to the seasonal malaria resurgence in parts of West Africa where the HbC variant is common.
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Affiliation(s)
- Bronner P Gonçalves
- Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD, United States of America.,Laboratory of Clinical Infectious Diseases - Epidemiology Unit, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD, United States of America.,Department of Immunology and Infection, London School of Hygiene & Tropical Medicine, London, UK
| | - Issaka Sagara
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies of Bamako, Bamako, Mali
| | - Mamadou Coulibaly
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies of Bamako, Bamako, Mali
| | - Yimin Wu
- Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD, United States of America.,PATH-Malaria Vaccine Initiative, Washington DC, USA
| | - Mahamadoun H Assadou
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies of Bamako, Bamako, Mali
| | - Agnes Guindo
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies of Bamako, Bamako, Mali
| | - Ruth D Ellis
- Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD, United States of America.,Biologics Consulting Group Inc, Alexandria, USA
| | - Mahamadou Diakite
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies of Bamako, Bamako, Mali
| | - Erin Gabriel
- Biostatistics Research Branch, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD, United States of America
| | - D Rebecca Prevots
- Laboratory of Clinical Infectious Diseases - Epidemiology Unit, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD, United States of America
| | - Ogobara K Doumbo
- Malaria Research and Training Center, University of Sciences, Techniques and Technologies of Bamako, Bamako, Mali
| | - Patrick E Duffy
- Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD, United States of America.
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Abstract
BACKGROUND Due to the increasing numbers of migrants and asylum seekers, hemoglobinopathies and glucose-6-phosphate dehydrogenase deficiency are no longer rare diseases in Germany. As a result of the current migration movements these genetically determined diseases will gain in importance. METHODS Following a literature search the prevalence of the original endemic regions was compiled and compared to the population composition based on statistical data on migrants, foreign residents and asylum seekers in Germany. RESULTS In the endemic regions a prevalence of 40 % and sometimes higher have been found for glucose-6-phosphate dehydrogenase deficiency and hemoglobinopathies. The number of people arriving in Germany from these endemic regions is rapidly increasing. CONCLUSION Due to the high number of asylum seekers arriving from Asian and African regions, genetic erythrocyte defects will gain importance in the differential diagnosis of anemia; therefore, medical education and training must incorporate heightened awareness of risks, diagnostics and therapy of these disease patterns.
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50
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Goheen MM, Campino S, Cerami C. The role of the red blood cell in host defence against falciparum malaria: an expanding repertoire of evolutionary alterations. Br J Haematol 2017; 179:543-556. [PMID: 28832963 DOI: 10.1111/bjh.14886] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The malaria parasite has co-evolved with its human host as each organism struggles for resources and survival. The scars of this war are carried in the human genome in the form of polymorphisms that confer innate resistance to malaria. Clinical, epidemiological and genome-wide association studies have identified multiple polymorphisms in red blood cell (RBC) proteins that attenuate malaria pathogenesis. These include well-known polymorphisms in haemoglobin, intracellular enzymes, RBC channels, RBC surface markers, and proteins impacting the RBC cytoskeleton and RBC morphology. A better understanding of how changes in RBC physiology impact malaria pathogenesis may uncover new strategies to combat the disease.
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Affiliation(s)
- Morgan M Goheen
- Department of Microbiology and Immunology, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Susana Campino
- Department of Pathogen Molecular Biology, Faculty of Infectious and Tropical Diseases, The London School of Hygiene & Tropical Medicine, London, UK
| | - Carla Cerami
- MRC International Nutrition Group at Keneba, MRC Unit The Gambia, Banjul, The Gambia
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