1
|
Pereira DA, Calmasini FB, Costa FF, Burnett AL, Silva FH. Nitric Oxide Resistance in Priapism Associated with Sickle Cell Disease: Mechanisms, Therapeutic Challenges, and Future Directions. J Pharmacol Exp Ther 2024; 390:203-212. [PMID: 38262744 DOI: 10.1124/jpet.123.001962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 12/07/2023] [Accepted: 01/05/2024] [Indexed: 01/25/2024] Open
Abstract
Patients with sickle cell disease (SCD) display priapism, a prolonged penile erection in the absence of sexual arousal. The current pharmacological treatments for SCD-associated priapism are limited and focused on acute interventions rather than prevention. Thus, there is an urgent need for new drug targets and preventive pharmacological therapies for this condition. This review focuses on the molecular mechanisms linked to the dysfunction of the NO-cyclic guanosine monophosphate (cGMP)-phosphodiesterase type 5 (PDE5) pathway implicated in SCD-associated priapism. In murine models of SCD, reduced nitric oxide (NO)-cGMP bioavailability in the corpus cavernosum is associated with elevated plasma hemoglobin levels, increased reactive oxygen species levels that inactive NO, and testosterone deficiency that leads to endothelial nitric oxide synthase downregulation. We discuss the consequences of the reduced cGMP-dependent PDE5 activity in response to these molecular changes, highlighting it as the primary pathophysiological mechanism leading to excessive corpus cavernosum relaxation, culminating in priapism. We also further discuss the impact of intravascular hemolysis on therapeutic approaches, present current pharmacological strategies targeting the NO-cGMP-PDE5 pathway in the penis, and identify potential pharmacological targets for future priapism therapies. In men with SCD and priapism, PDE5 inhibitor therapy and testosterone replacement have shown promising results. Recent preclinical research reported the beneficial effect of treatment with haptoglobin and NO donors. SIGNIFICANCE STATEMENT: This review discusses the molecular changes that reduce NO-cGMP bioavailability in the penis in SCD and highlights pharmacological targets and therapeutic strategies for the treatment of priapism, including PDE5 inhibitors, hormonal modulators, NO donors, hydroxyurea, soluble guanylate cyclase stimulators, haptoglobin, hemopexin, and antioxidants.
Collapse
Affiliation(s)
- Dalila Andrade Pereira
- Laboratory of Pharmacology, São Francisco University Medical School, Bragança Paulista, SP, Brazil (D.A.P., F.H.S.); Universidade Federal de São Paulo, Escola Paulista de Medicina, Department of Pharmacology, São Paulo, SP, Brazil (F.B.C.); Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil (F.F.C.); and The James Buchanan Brady Urological Institute and Department of Urology, The Johns Hopkins School of Medicine, Baltimore, Maryland (A.L.B.)
| | - Fabiano Beraldi Calmasini
- Laboratory of Pharmacology, São Francisco University Medical School, Bragança Paulista, SP, Brazil (D.A.P., F.H.S.); Universidade Federal de São Paulo, Escola Paulista de Medicina, Department of Pharmacology, São Paulo, SP, Brazil (F.B.C.); Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil (F.F.C.); and The James Buchanan Brady Urological Institute and Department of Urology, The Johns Hopkins School of Medicine, Baltimore, Maryland (A.L.B.)
| | - Fernando Ferreira Costa
- Laboratory of Pharmacology, São Francisco University Medical School, Bragança Paulista, SP, Brazil (D.A.P., F.H.S.); Universidade Federal de São Paulo, Escola Paulista de Medicina, Department of Pharmacology, São Paulo, SP, Brazil (F.B.C.); Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil (F.F.C.); and The James Buchanan Brady Urological Institute and Department of Urology, The Johns Hopkins School of Medicine, Baltimore, Maryland (A.L.B.)
| | - Arthur L Burnett
- Laboratory of Pharmacology, São Francisco University Medical School, Bragança Paulista, SP, Brazil (D.A.P., F.H.S.); Universidade Federal de São Paulo, Escola Paulista de Medicina, Department of Pharmacology, São Paulo, SP, Brazil (F.B.C.); Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil (F.F.C.); and The James Buchanan Brady Urological Institute and Department of Urology, The Johns Hopkins School of Medicine, Baltimore, Maryland (A.L.B.)
| | - Fábio Henrique Silva
- Laboratory of Pharmacology, São Francisco University Medical School, Bragança Paulista, SP, Brazil (D.A.P., F.H.S.); Universidade Federal de São Paulo, Escola Paulista de Medicina, Department of Pharmacology, São Paulo, SP, Brazil (F.B.C.); Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil (F.F.C.); and The James Buchanan Brady Urological Institute and Department of Urology, The Johns Hopkins School of Medicine, Baltimore, Maryland (A.L.B.)
| |
Collapse
|
2
|
Jalloh M, Niang L, Kyungu Y, Ndoye M, Gassama B, Mbodji MM, Diallo A, Labou I, Fontaine CL, Vogt M, Gaballa N, Ajayi O, Gueye SM, MacDonald JA, Ralph DJ, Stephenson BM, Kalejaiye OM. Penile prosthesis for erectile dysfunction: early experience in Senegal, West Africa. Int J Impot Res 2024:10.1038/s41443-024-00920-8. [PMID: 38987290 DOI: 10.1038/s41443-024-00920-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 04/26/2024] [Accepted: 05/22/2024] [Indexed: 07/12/2024]
Affiliation(s)
- Mohamed Jalloh
- Department of Urology, Hopital General Idrissa Pouye, Dakar, Senegal
| | - Lamine Niang
- Department of Urology, Hopital General Idrissa Pouye, Dakar, Senegal
| | - Yves Kyungu
- Department of Urology, Hopital General Idrissa Pouye, Dakar, Senegal
| | - Madina Ndoye
- Department of Urology, Hopital General Idrissa Pouye, Dakar, Senegal
| | - Bécaye Gassama
- Department of Urology, Hopital General Idrissa Pouye, Dakar, Senegal
| | | | | | - Issa Labou
- Department of Urology, Hopital General Idrissa Pouye, Dakar, Senegal
| | | | - Maria Vogt
- Department of Urology, University Hospitals Birmingham, Birmingham, B75 7RR, UK
| | - Nadar Gaballa
- Department of Urology, University Hospitals Birmingham, Birmingham, B75 7RR, UK
| | - Omololu Ajayi
- Department of Urology, North Middlesex University Hospital, London, N18 1QX, UK
| | | | - Jean A MacDonald
- Department of Urology, North Middlesex University Hospital, London, N18 1QX, UK
| | - David J Ralph
- University College London Hospitals, Westmoreland Street, London, W1G 8PH, UK
| | - Brian M Stephenson
- Department of Surgery, Royal Gwent Hospital, Newport, South Wales, NP20 2UB, UK
| | - Odunayo M Kalejaiye
- Bristol Urological Institute, North Bristol NHS Trust, Bristol, BS10 5NB, UK.
| |
Collapse
|
3
|
Burnett AL. Priapism: a new era. Int J Impot Res 2024; 36:1-2. [PMID: 38238483 DOI: 10.1038/s41443-024-00825-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 01/05/2024] [Accepted: 01/05/2024] [Indexed: 01/27/2024]
Affiliation(s)
- Arthur L Burnett
- Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| |
Collapse
|
4
|
Pereira DA, Pereira DA, Silveira THR, Calmasini FB, Burnett AL, Costa FF, Silva FH. Heme-induced corpus cavernosum relaxation and its implications for priapism in sickle cell disease: a mechanistic insight. Andrology 2024. [PMID: 38231174 DOI: 10.1111/andr.13599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 12/15/2023] [Accepted: 01/08/2024] [Indexed: 01/18/2024]
Abstract
BACKGROUND Patients with sickle cell disease (SCD) experience intravascular hemolysis, leading to elevated plasma heme levels. This phenomenon has been associated with increased priapism in men with SCD. The heme group can be metabolized by heme oxygenase (HO), generating carbon monoxide (CO), which is known to promote smooth muscle relaxation via soluble guanylyl cyclase (sGC)-cyclic guanosine monophosphate (cGMP). However, the effects of heme on the relaxation responses of corpus cavernosum (CC) have not been investigated. OBJECTIVES To evaluate the functional and biochemical effects of the heme group on mouse CC smooth muscle in vitro. MATERIALS AND METHODS Male C57BL/6 mice were used. CC tissues were mounted in organ baths. Measurement of cGMP in mice CC was evaluated. RESULTS The cumulative addition of heme concentrations promoted the relaxation of CC. HO inhibitor (1J, 100 μM) or sGC inhibitor (ODQ, 10 μM) blocked the relaxing effect of the heme group. Pre-incubation of CC with heme (100 μM) enhanced relaxation induced by acetylcholine, sodium nitroprusside, and nitrergic relaxation (electrical field stimulation), which was abolished by 1J or ODQ. The heme group increased the cGMP production in CC, which was abolished by 1J or ODQ. cGMP levels were significantly higher in CC treated with heme, and pre-incubation with compound 1J or ODQ abolished the effect of heme in raising cGMP levels. DISCUSSION AND CONCLUSION The HO-CO-sGC-cGMP pathway appears to play a crucial role in promoting CC relaxation. Our study provides novel insight into the role of group heme in CC relaxation and its potential contribution to priapism in SCD. Heme may serve as a pharmacological target for new therapies to prevent priapism.
Collapse
Affiliation(s)
- Dalila Andrade Pereira
- Laboratory of Pharmacology, São Francisco University Medical School, Bragança Paulista, São Paulo, SP, Brazil
| | - Danillo Andrade Pereira
- Laboratory of Pharmacology, São Francisco University Medical School, Bragança Paulista, São Paulo, SP, Brazil
| | | | - Fabiano Beraldi Calmasini
- Department of Pharmacology, Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, SP, Brazil
| | - Arthur L Burnett
- The James Buchanan Brady Urological Institute and Department of Urology, The Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | | | - Fábio Henrique Silva
- Laboratory of Pharmacology, São Francisco University Medical School, Bragança Paulista, São Paulo, SP, Brazil
| |
Collapse
|
5
|
Frank C, Toole KP. Priapism in a Young Adult With Sickle Cell Disease. Adv Emerg Nurs J 2024; 46:25-32. [PMID: 38285418 DOI: 10.1097/tme.0000000000000494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
This article presents a case study focusing on priapism in a patient with sickle cell disease, with repeated emergency department (ED) visits and hospitalizations. The patient was successfully identified and treated by the ED nurse practitioner (NP) with aspiration of the corpus cavernosum. Priapism is a persistent penile erection that continues for an extended time. There is some argument about what that length of time is, but generally, the consensus is more than 4 hr beyond sexual stimulation or unrelated to sexual stimulation or sexual interest (Bivalacqua et al., 2022). Priapism is a fairly common but underrecognized complication of sickle cell disease. It represents a urological emergency in which timely diagnosis and appropriate treatment are vital to preserving penile tissue and sexual function. The diagnosis is made clinically with a comprehensive history, physical examination, and appropriate laboratory test values. Initial management can be conservative with hydration and analgesics or, if necessary, more invasive with needle aspiration to promote detumescence. Permanent tissue damage or erectile dysfunction can result if priapism is unrecognized, untreated, or not treated immediately. The NP plays an integral role in treating and preventing permanent damage. Patient education should focus on instructions for preventing priapism and managing episodes at home.
Collapse
Affiliation(s)
- Catherine Frank
- Xavier University College of Nursing, Cincinnati, Ohio (Drs Frank and Toole); and Bon Secours Emergency Departments, Cincinnati, Ohio (Dr Frank)
| | | |
Collapse
|
6
|
Nahata L, Quinn GP, Strouse JJ, Creary SE. Addressing fertility in adolescent boys with sickle cell disease: emerging clinical and ethical dilemmas. Blood Adv 2023; 7:5351-5353. [PMID: 37155994 PMCID: PMC10509661 DOI: 10.1182/bloodadvances.2023010292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/01/2023] [Accepted: 05/03/2023] [Indexed: 05/10/2023] Open
Affiliation(s)
- Leena Nahata
- Division of Endocrinology, Department of Pediatrics, The Ohio State University College of Medicine, Nationwide Children’s Hospital, Columbus, OH
- Center for Biobehavioral Health, The Abigail Wexner Research Institute at Nationwide Children’s Hospital, Columbus, OH
| | - Gwendolyn P. Quinn
- Department of Obstetrics and Gynecology, New York University Grossman School of Medicine, New York, NY
- Division of Medical Ethics, Department of Population Health, New York University Grossman School of Medicine, New York, NY
| | - John J. Strouse
- Division of Hematology, Department of Medicine, Duke University School of Medicine, Durham, NC
- Division of Pediatric Hematology/Oncology, Department of Pediatrics, Duke University School of Medicine, Durham, NC
| | - Susan E. Creary
- Division of Hematology/Oncology/BMT, Department of Pediatrics, The Ohio State University College of Medicine Nationwide Children’s Hospital, Columbus, OH
- Center for Child Health Equity and Outcomes Research, The Abigail Wexner Research Institute at Nationwide Children’s Hospital, Columbus, OH
| |
Collapse
|
7
|
Gaye O, Seck M, Gueye M, Toure SA, Faye BF, Thiam NM, Jalloh M, Ndoye M, Niang L, Fall PA, Diop S. Evaluation of knowledge of priapism in sickle cell patients in Senegal. Int Urol Nephrol 2023; 55:2169-2175. [PMID: 37165263 DOI: 10.1007/s11255-023-03628-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 05/05/2023] [Indexed: 05/12/2023]
Abstract
PURPOSE Erectile dysfunction is a dreadful complication of priapism especially with delay in diagnosis and management. The lack of awareness of priapism as a vaso-occlusive complication of sickle cell disease (SCD) is more concerning. The objective of this study was to evaluate the burden of priapism in adult Senegalese males adults with sickle cell disease. METHODS A cross-sectional study was carried out amongst consecutive consenting males aged 18 years and older with SCD presenting to the in Haematology Department of the National Blood Transfusion Centre (Dakar, Senegal). All participants completed a questionnaire detailing knowledge on the definition of priapism, its association with SCD, consequences of untreated priapism and treatment options. RESULTS A total of 219 participants completed the questionnaire. The mean age of the respondents was 27.1 years with a range of (18-54). Of the respondents, 78.5% (n = 172) did not have any knowledge of the term "priapism". After the term was explained, 38.4% (n = 84) thought that there may be a risk of developing priapism given the diagnosis of sickle cell disease. Among the participants, 41.5% (n = 91) reported having a history of priapism. Among all patients who experienced priapism, 36.3% (n = 33) did not seek medical attention with episodes of priapism. It was found that 48.4% (n = 106) of the participants thought there may be a risk of irreversible complications associated with priapism and a corresponding proportion, 42% (n = 92) thought this risk was time dependent. 36.5% (n = 80) of patients believed priapism could lead to erectile dysfunction. CONCLUSION Priapism is a common complication of sickle cell disease in Senegalese adults which is not well known by sickle cell patients. The health authorities must undertake efforts to raise awareness of priapism as a complication amongst sickle cell patients.
Collapse
Affiliation(s)
- Oumar Gaye
- Urology Department of Dalal Jamm Hospital, Dakar, Senegal.
| | - Moussa Seck
- National Blood Transfusion Center, Dakar, Senegal
| | | | | | | | - Ngor Mack Thiam
- Urology Department of the General Hospital Idrissa Pouye, Dakar, Senegal
| | - Mohamed Jalloh
- Urology Department of the General Hospital Idrissa Pouye, Dakar, Senegal
| | - Madina Ndoye
- Urology Department of the General Hospital Idrissa Pouye, Dakar, Senegal
| | - Lamine Niang
- Urology Department of the General Hospital Idrissa Pouye, Dakar, Senegal
| | | | - Saliou Diop
- National Blood Transfusion Center, Dakar, Senegal
| |
Collapse
|
8
|
Adigwe OP, Onavbavba G, Onoja SO. Impact of Sickle Cell Disease on Affected Individuals in Nigeria: A Critical Review. Int J Gen Med 2023; 16:3503-3515. [PMID: 37601802 PMCID: PMC10438428 DOI: 10.2147/ijgm.s410015] [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: 02/24/2023] [Accepted: 06/08/2023] [Indexed: 08/22/2023] Open
Abstract
Sickle cell disease is an autosomal recessive disorder of the beta-globin gene, with resultant deformation of the red blood cells and variable clinical outcomes. Nigeria is recognised as the country with the highest burden of sickle cell disease globally. This study aimed at critically reviewing available literature on impact of sickle cell disease in Nigeria. A literature search was carried out on four databases, and a total of 116 articles that met the inclusion criteria were included in the critical review. It was observed that majority of the studies were carried out in South-Western part of Nigeria (47.4%), whilst the North-East had the least number of studies undertaken in this area, more than a quarter of the studies (27.6%) were related to hematologic and serologic screening. Major themes that emerged from this review were morbidity and mortality; prevalence of sickle cell disease; issues relating to blood transfusion; psychosocial impact; and anatomical dysfunction in sickle cell disease. Intervention programs from both government and non-governmental organizations aimed at reducing the burden of sickle cell disease and its socio-economic impact were identified as key to strategies aimed at overcoming challenges associated with the disease. Findings from this study also revealed that education and awareness interventions were central to reducing the prevalence of sickle cell disease in this setting.
Collapse
Affiliation(s)
- Obi Peter Adigwe
- National Institute for Pharmaceutical Research and Development, Abuja, Federal Capital Territory, Nigeria
| | - Godspower Onavbavba
- National Institute for Pharmaceutical Research and Development, Abuja, Federal Capital Territory, Nigeria
| | - Solomon Oloche Onoja
- Department of Medical Laboratory Sciences, University of Nigeria, Enugu, Nigeria
| |
Collapse
|
9
|
Linton EA, Williams EC, Early ML, Prince E, Stewart RW, Lanzkron S, Pecker LH. Family planning needs of young adults with sickle cell disease. EJHAEM 2023; 4:587-594. [PMID: 37601884 PMCID: PMC10435671 DOI: 10.1002/jha2.711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 05/04/2023] [Indexed: 08/22/2023]
Abstract
Sexual and reproductive healthcare standards for adolescents and young adults with sickle cell disease (SCD) are not established. A total of 50 young adults entering adult SCD care completed a Family Planning Survey assessing sexual and reproductive health needs from March 2019 to July 2020. Clinical data were abstracted from respondents' electronic medical records. Linear and logistic regression was applied to explore associations between clinical characteristics and survey results. Few respondents (8%) wished to be pregnant in the coming year, and 46% answered yes to at least one of four needs assessment questions. Those who were not employed full time were more likely to endorse needing help with getting sickle cell trait testing for a partner (ORadj = 9.59, p-value = 0.05). Contraceptive use was associated with having an obstetrician-gynecologist (OR = 6.8, p-value = 0.01). Young adults with SCD entering adult care have diverse reproductive health needs, highlighting opportunities to provide multidisciplinary, SCD-specific reproductive healthcare.
Collapse
Affiliation(s)
- Elizabeth A. Linton
- Center on Aging and Health, Department of EpidemiologyJohns Hopkins Bloomberg School of Public HealthBaltimoreMarylandUSA
| | | | - Macy L. Early
- Division of Hematology, Department of MedicineJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| | - Elizabeth Prince
- Department of Psychiatry and Behavioral SciencesJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| | - Rosalyn W. Stewart
- Division of General Internal Medicine, Department of MedicineJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| | - Sophie Lanzkron
- Division of Hematology, Department of MedicineJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| | - Lydia H. Pecker
- Division of Hematology, Department of MedicineJohns Hopkins University School of MedicineBaltimoreMarylandUSA
- Department of Gynecology and ObstetricsJohns Hopkins University School of MedicineBaltimoreMarylandUSA
| |
Collapse
|
10
|
Suttorp M, Sembill S, Kalwak K, Metzler M, Millot F. Priapism at Diagnosis of Pediatric Chronic Myeloid Leukemia: Data Derived from a Large Cohort of Children and Teenagers and a Narrative Review on Priapism Management. J Clin Med 2023; 12:4776. [PMID: 37510891 PMCID: PMC10380995 DOI: 10.3390/jcm12144776] [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: 06/01/2023] [Revised: 07/04/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023] Open
Abstract
Pediatric chronic myeloid leukemia (CML) is a very rare malignancy (age-related incidence 0.1/100,000) typically presenting with leucocyte counts >100,000/µL. However, clinical signs of leukostasis are observed at diagnosis in only approximately 10% of all cases and among these, priapism is infrequent. Here, we analyze data from pediatric CML registries on the occurrence of priapism heralding diagnosis of CML in 16/491 (3.2%) boys (median age 13.5 years, range 4-18) with pediatric CML. In the cohort investigated, duration of priapism resulting in a diagnosis of CML was not reported in 5 patients, and in the remaining 11 patients, occurred as stuttering priapism over 3 months (n = 1), over 6 weeks (n = 1), over 1-2 weeks (n = 2), over several days (n = 2), or 24 h (n = 1), while the remaining 4 boys reported continuous erection lasting over 11-12 h. All patients exhibited splenomegaly and massive leukocytosis (median WBC 470,000/µL, range 236,700-899,000). Interventions to treat priapism were unknown in 5 patients, and in the remaining cohort, comprised intravenous fluids ± heparin (n = 2), penile puncture (n = 5) ± injection of sympathomimetics (n = 4) ± intracavernous shunt operation (n = 1) paralleled by leukocyte-reductive measures. Management without penile puncture by leukapheresis or exchange transfusion was performed in 3 boys. In total, 7 out 15 (47%) long-term survivors (median age 20 years, range 19-25) responded to a questionnaire. All had maintained full erectile function; however, 5/7 had presented with stuttering priapism while in the remaining 2 patients priapism had lasted <12 h until intervention. At its extreme, low-flow priapism lasting for longer than 24 h may result in partial or total impotence by erectile dysfunction. This physical disability can exert a large psychological impact on patients' lives. In a narrative review fashion, we analyzed the literature on priapism in boys with CML which is by categorization stuttering or persisting as mostly painful, ischemic (low-flow) priapism. Details on the pathophysiology are discussed on the background of the different blood rheology of hyperleukocytosis in acute and chronic leukemias. In addition to the data collected, instructive case vignettes demonstrate the diagnostic and treatment approaches and the outcome of boys presenting with priapism. An algorithm for management of priapism in a stepwise fashion is presented. All approaches must be performed in parallel with cytoreductive treatment of leukostasis in CML which comprises leukapheresis and exchange transfusions ± cytotoxic chemotherapy.
Collapse
Affiliation(s)
- Meinolf Suttorp
- Pediatric Hematology and Oncology, Medical Faculty, TU Dresden, 01307 Dresden, Germany
| | - Stephanie Sembill
- Pediatric Oncology and Hematology, Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, 91054 Erlangen, Germany; (S.S.); (M.M.)
- Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), 91054 Erlangen, Germany
| | - Krzysztof Kalwak
- Supraregional Center of Pediatric Oncology “Cape of Hope”, Wroclaw Medical University, 50-556 Wroclaw, Poland;
| | - Markus Metzler
- Pediatric Oncology and Hematology, Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, 91054 Erlangen, Germany; (S.S.); (M.M.)
- Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), 91054 Erlangen, Germany
| | - Frederic Millot
- Inserm CIC 1402, University Hospital of Poitiers, 86000 Poitiers, France;
| |
Collapse
|
11
|
Idris IM, Burnett AL, DeBaun MR. Epidemiology and treatment of priapism in sickle cell disease. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2022; 2022:450-458. [PMID: 36485155 PMCID: PMC9820196 DOI: 10.1182/hematology.2022000380] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Ischemic priapism is a common but underrecognized morbidity affecting about 33% of adult men with sickle cell disease (SCD). The onset of priapism occurs in the prepubertal period and tends to be recurrent with increasing age. Significantly, priapism is associated with an unrecognized high burden of mental duress and sexual dysfunctions. The diagnosis of priapism is clinical. Many episodes of priapism will resolve spontaneously, but when an episode lasts longer than 4 hours, the episode is considered a urologic emergency requiring quick intervention with either corporal aspiration or shunt surgery. Only 3 randomized clinical trials (stilbesterol, ephedrine or etilefrine, and sildenafil) have been conducted for secondary priapism prevention in SCD. All 3 trials were limited with small sample sizes, selection biases, and inconclusive results after completion. The current molecular understanding of the pathobiology of priapism suggests a relative nitric oxide (NO) deficiency secondary to chronic hemolysis in SCD and associated phosphodiesterase type 5 dysregulation. We posit an increase in NO levels will restore the normal homeostatic relationship between voluntary erection and detumescence. Currently, 2 randomized phase 2 trials (1 double-blind, placebo-controlled trial and 1 open-label, single-arm intervention) are being conducted for secondary priapism prevention in men at high risk for recurrent priapism (NCT03938454 and NCT05142254). We review the epidemiology and pathobiology of priapism, along with mechanistic therapeutic approaches for secondary prevention of priapism in SCD.
Collapse
Affiliation(s)
- Ibrahim M. Idris
- Department of Haematology, Aminu Kano Teaching Hospital/Bayero University, Kano, Nigeria
| | | | - Michael R. DeBaun
- Vanderbilt-Meharry Sickle Cell Disease Center of Excellence, Vanderbilt University Medical Center, Nashville, TN
| |
Collapse
|
12
|
Abstract
This overview of reproductive and sexual health care concerns for people with sickle cell disease (SCD) addresses clinical concerns that can be complex and are inherently multidisciplinary. Clinicians must be prepared to initiate reproductive health care discussions, as these intimate concerns may not be volunteered by patients. SCD is associated with delayed onset of puberty, sickle pain during menstruation, disease-specific contraceptive considerations, high-risk pregnancy, priapism, erectile dysfunction, and offspring who inherit a hemoglobinopathy trait from affected parents. Reproductive health considerations are underrecognized, undertreated, and understudied. They need attention in primary care and specialty SCD, urology, and obstetrics and gynecology clinics.
Collapse
|
13
|
Adesoye OB, Akhigbe RE. Predictors of Sex-Induced Crisis, Sexual Function and Marital Satisfaction in Women with Sickle Cell Disease. J Sex Med 2022; 19:1625-1633. [PMID: 36088276 DOI: 10.1016/j.jsxm.2022.07.013] [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: 08/13/2021] [Revised: 07/23/2022] [Accepted: 07/27/2022] [Indexed: 11/21/2022]
Abstract
BACKGROUND Sex-induced and orgasm-induced crisis, sexual dysfunction, and marital satisfaction among women with sickle cell disease (SCD) is under-reported. AIM This study assessed sexual function in women with SCD and compared sexual function in women with SCD to women without SCD. METHODS This was a descriptive and comparative cross-sectional survey that involved 435 women with SCD and 406 women without SCD (as controls). OUTCOMES This study demonstrates the predictors of sex-induced crisis, sexual function and marital satisfaction in women with sickle cell disease. RESULTS The prevalence of dyspareunia and marital dissatisfaction was higher in women with SCD than those without SCD. In addition, SCD was significantly associated with multiple sexual dysfunctions, with reported symptoms of sexual desire disorder (HSDD), female sexual arousal disorder (FSAD), and female sexual orgasm disorder (FSOD). Genotype, age, age at puberty, dyspareunia, and duration of infertility were the observed independent predictors of sexual dysfunction in women with SCD. Also, most (54.02%) of the SCD subjects experienced sex-induced and orgasm-induced crises. Although water intake before and after sex was reported to be beneficial in preventing sex-induced and orgasm-induced crisis in women with SCD, it was not a predictor of sexual dysfunction. CLINICAL IMPLICATIONS SCD patients are at risk of sex-induced and orgasm-induced crisis as well as sexual dysfunction. STRENGTHS AND LIMITATIONS No study has ever reported the incidence of sex-and orgasm-induced crisis and sexual dysfunction in women with SCD. Also, we used a reasonably large sample size and utilized widely acceptable validated and reproducible tools like ENRICH Marital Satisfaction (EMS) and Female Sexual Function Index (FSFI) to assess the marital satisfaction and sexual function of the studied participants. This allows for the generalization of our findings. The limitations of the present study include recall bias and the inability to document real-time occurrences of sex-and orgasm-induced crisis and the incidence of female sexual dysfunction. Furthermore, though the risk factors of sexual dysfunction as perceived by women with SCD were elicited, biological risk factors and the possible associated mechanisms were not determined in this study. CONCLUSION Our study shows that sex-induced and orgasm-induced crisis and sexual dysfunction are significant morbidities in women with SCD, and fluid/water intake before and after sexual activity may be beneficial.
Collapse
Affiliation(s)
- Oluwatosin B Adesoye
- SickleLive Foundation, Osogbo, Nigeria
- SickleLive Foundation Research Laboratory, Osogbo, Nigeria
- State Specialist Hospital, Osogbo, Osun State, Nigeria
| | - Roland E Akhigbe
- Department of Physiology Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria
- Reproductive Biology and Toxicology Research LaboratoriesOasis of Grace Hospital, Osogbo, Osun State, Nigeria
| |
Collapse
|
14
|
Bedrick BS, Kohn TP, Pecker LH, Christianson MS. Fertility preservation for pediatric patients with hemoglobinopathies: Multidisciplinary counseling needed to optimize outcomes. Front Endocrinol (Lausanne) 2022; 13:985525. [PMID: 36353243 PMCID: PMC9638952 DOI: 10.3389/fendo.2022.985525] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 09/30/2022] [Indexed: 01/19/2023] Open
Abstract
Hemoglobinopathies are autosomal recessive disorders that occur when genetic mutations negatively impact the function of hemoglobin. Common hemoglobinopathies that are clinically significant include sickle cell disease, alpha thalassemia, and beta thalassemia. Advancements in disease-modifying and curative treatments for the common hemoglobinopathies over the past thirty years have led to improvements in patient quality of life and longevity for those who are affected. However, the diseases, their treatments and cures pose infertility risks, making fertility preservation counseling and treatment an important part of the contemporary comprehensive patient care. Sickle cell disease negatively impacts both male and female infertility, primarily by testicular failure and decreased ovarian reserve, respectively. Fertility in both males and females with beta thalassemia major are negatively impacted by iron deposition due to chronic blood transfusions. Hematopoietic stem cell transplant (HSCT) is currently the only curative treatment for SCD and transfusion dependent beta thalassemia. Many of the conditioning regimens for HSCT contain chemotherapeutic agents with known gonadotoxicity and whole-body radiation. Although most clinical studies on toxicity and impact of HSCT on long-term health do not evaluate fertility, gonadal failure is common. Male fertility preservation modalities that exist prior to gonadotoxic treatment include sperm banking for pubertal males and testicular cryopreservation for pre-pubertal boys. For female patients, fertility preservation options include oocyte cryopreservation and ovarian tissue cryopreservation. Oocyte cryopreservation requires controlled ovarian hyperstimulation (COH) with ten to fourteen days of intensive monitoring and medication administration. This is feasible once the patient has undergone menarche. Follicular growth is monitored via transvaginal or transabdominal ultrasound, and hormone levels are monitored through frequent blood work. Oocytes are then harvested via a minimally invasive approach under anesthesia. Complications of COH are more common in patients with hemoglobinopathies. Ovarian hyperstimulation syndrome creates a greater risk to patients with underlying vascular, pulmonary, and renal injury, as they may be less able to tolerate fluids shifts. Thus, it is critical to monitor patients undergoing COH closely with close collaboration between the hematology team and the reproductive endocrinology team. Counseling patients and families about future fertility must take into consideration the patient's disease, treatment history, and planned treatment, acknowledging current knowledge gaps.
Collapse
Affiliation(s)
- Bronwyn S. Bedrick
- Department of Gynecology and Obstetrics, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Taylor P. Kohn
- Department of Urology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Lydia H. Pecker
- Department of Medicine, Division of Adult Hematology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Mindy S. Christianson
- Department of Gynecology and Obstetrics, Division of Reproductive Endocrinology and Infertility, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| |
Collapse
|
15
|
Gaye O, Seck M, Gueye SM, Touré SA, Diallo AI, Faye BF, Thiam NM, Bousso ES, Jalloh M, Ndoye M, Niang L, Fall PA, Diop S, Gueye SM. [Sexuality assessment of homozygous adult sickle cell patients with a history of priapism in Senegal]. Prog Urol 2022; 32:862-867. [PMID: 35623942 DOI: 10.1016/j.purol.2022.03.008] [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: 09/28/2021] [Revised: 03/02/2022] [Accepted: 03/21/2022] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The objective of this study was to evaluate the sexuality of SS sickle cell patients with a history of priapism. METHODS This was a case-control study of adult SS sickle cell patients. The occurrence of priapism as well as the nature of the priapism had been investigated. The patients were subdivided into three groups: Group 1 (no priapism), Group 2 (intermittent priapism) and Group 3 (acute priapism). The patients' sexuality was studied using the IIEF-15 questionnaire. RESULTS We interviewed 191 SS sickle cell patients. The mean age was 27.1±7.1 years. Priapism was observed in 43.5 %. Only 77 patients were eligible for the IIEF15 questionnaire. Groups 1 and 2 performed significantly better than group 3 on erectile function (EF) and orgasmic function (OF) scores. There was no significant difference in the EF and OF scores between groups 1 and 2. No significant difference was observed between the three groups for the scores of sexual desire (SD), intercourse satisfaction (IS), and overall satisfaction (OS). The impairment of erectile function in group 2 was related to the age of the first episode of priapism and the last episode. The impairment of erectile function in group 3 was related to the duration of evolution (P<0.05). CONCLUSION This study shows that priapism is responsible for impaired erectile function in SS adult sickle cell patients. A program to prevent intermittent episodes of priapism should be put in place.
Collapse
Affiliation(s)
- O Gaye
- Service d'urologie de l'Hôpital Général Idrissa Pouye, Dakar, Sénégal; Service d'urologie de l'Hôpital Dalal Jamm, Dakar, Sénégal.
| | - M Seck
- Centre National Transfusion Sanguine, Dakar, Sénégal.
| | - S M Gueye
- Centre National Transfusion Sanguine, Dakar, Sénégal.
| | - S A Touré
- Centre National Transfusion Sanguine, Dakar, Sénégal.
| | - A I Diallo
- Service Santé Publique, Université Cheikh Anta Diop Dakar, Dakar.
| | - B F Faye
- Centre National Transfusion Sanguine, Dakar, Sénégal.
| | - N M Thiam
- Service d'urologie de l'Hôpital Général Idrissa Pouye, Dakar, Sénégal.
| | - E S Bousso
- Centre National Transfusion Sanguine, Dakar, Sénégal.
| | - M Jalloh
- Service d'urologie de l'Hôpital Général Idrissa Pouye, Dakar, Sénégal.
| | - M Ndoye
- Service d'urologie de l'Hôpital Général Idrissa Pouye, Dakar, Sénégal.
| | - L Niang
- Service d'urologie de l'Hôpital Général Idrissa Pouye, Dakar, Sénégal.
| | - P A Fall
- Service d'urologie de l'Hôpital Dalal Jamm, Dakar, Sénégal.
| | - S Diop
- Centre National Transfusion Sanguine, Dakar, Sénégal.
| | - S M Gueye
- Service d'urologie de l'Hôpital Général Idrissa Pouye, Dakar, Sénégal.
| |
Collapse
|
16
|
Nickel RS, Maher JY, Hsieh MH, Davis MF, Hsieh MM, Pecker LH. Fertility after Curative Therapy for Sickle Cell Disease: A Comprehensive Review to Guide Care. J Clin Med 2022; 11:2318. [PMID: 35566443 PMCID: PMC9105328 DOI: 10.3390/jcm11092318] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/07/2022] [Accepted: 04/12/2022] [Indexed: 12/30/2022] Open
Abstract
Curative therapy for sickle cell disease (SCD) currently requires gonadotoxic conditioning that can impair future fertility. Fertility outcomes after curative therapy are likely affected by pre-transplant ovarian reserve or semen analysis parameters that may already be abnormal from SCD-related damage or hydroxyurea treatment. Outcomes are also likely affected by the conditioning regimen. Conditioning with myeloablative busulfan and cyclophosphamide causes serious gonadotoxicity particularly among post-pubertal females. Reduced-intensity and non-myeloablative conditioning may be acutely less gonadotoxic, but more short and long-term fertility outcome data after these approaches is needed. Fertility preservation including oocyte/embryo, ovarian tissue, sperm, and experimental testicular tissue cryopreservation should be offered to patients with SCD pursing curative therapy. Regardless of HSCT outcome, longitudinal post-HSCT fertility care is required.
Collapse
Affiliation(s)
- Robert Sheppard Nickel
- Children’s National Hospital, Division of Hematology, Washington, DC 20001, USA;
- Children’s National Hospital, Division of Blood and Marrow Transplantation, Washington, DC 20001, USA
- School of Medicine and Health Sciences, The George Washington University, Washington, DC 20001, USA;
| | - Jacqueline Y. Maher
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, Pediatric and Adolescent Gynecology, National Institutes of Health, Bethesda, MD 20810, USA;
- Children’s National Hospital, Pediatric and Adolescent Gynecology Program, Washington, DC 20001, USA
| | - Michael H. Hsieh
- School of Medicine and Health Sciences, The George Washington University, Washington, DC 20001, USA;
- Children’s National Hospital, Division of Urology, Washington, DC 20001, USA
| | - Meghan F. Davis
- Department of Urology, MedStar Georgetown University Hospital, Washington, DC 20001, USA;
| | - Matthew M. Hsieh
- Cellular and Molecular Therapeutics Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20810, USA;
| | - Lydia H. Pecker
- Division of Hematology, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, MD 20810, USA
| |
Collapse
|
17
|
Idris IM, Bonnet K, Schlundt D, Abba A, Galadanci J, Burnett AL, DeBaun MR. Psychometric Impact of Priapism on Lives of Adolescents and Adults With Sickle Cell Anemia: A Sequential Independent Mixed-Methods Design. J Pediatr Hematol Oncol 2022; 44:19-27. [PMID: 33560078 DOI: 10.1097/mph.0000000000002056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 11/20/2020] [Indexed: 11/25/2022]
Abstract
Despite priapism being one of the most frequent complications of sickle cell anemia (SCA) in male individuals, little has been reported about the impact of priapism in this population. The authors used a sequential independent mixed-methods design, which used both international multicenter focus group discussions (n=35) and a quantitative patient-reported outcome measure (n=131) to determine the impact of priapism on men with SCA in Nigeria and the United States. The authors analyzed data from focus groups using an iterative inductive-deductive approach. Comparison of the Priapism Impact Profile data was done using the Kruskal-Wallis H test. Our result showed that priapism, across cultures, is associated with shame and embarrassment. These emotions interfere with timely clinical and family communication about priapism symptoms and complications. Participants were dissatisfied with the quality of care at emergency facilities. The quality of life and physical wellness of men with SCA-related priapism were significantly different for the 3 groups: (1) priapism condition getting better, (2) priapism condition getting worse, and (3) priapism condition remain the same (P=0.002 and P=0.019, respectively). Psychological, sexual, and physical wellbeing are all adversely affected by priapism. Evidence-based methods are necessary for adequate medical, educational, and psychological treatment for recurrent priapism.
Collapse
Affiliation(s)
| | | | | | - Akib Abba
- Department of Hematology, Aminu Kano Teaching Hospital
| | - Jamil Galadanci
- Department of Computer Science, Bayero University Kano, Kano, Nigeria
| | | | - Michael R DeBaun
- Vanderbilt-Meharry Sickle Cell Disease Center of Excellence, Vanderbilt University Medical Center, Nashville, TN
| |
Collapse
|
18
|
Debaun MR. PRIMARY STROKE PREVENTION IN CHILDREN WITH SICKLE CELL ANEMIA LIVING IN AFRICA: THE FALSE CHOICE BETWEEN PATIENT-ORIENTED RESEARCH AND HUMANITARIAN SERVICE-PART II. TRANSACTIONS OF THE AMERICAN CLINICAL AND CLIMATOLOGICAL ASSOCIATION 2022; 132:236-248. [PMID: 36196180 PMCID: PMC9480538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
In the United States, primary stroke prevention in children with sickle cell anemia (SCA) is the standard of care and includes annual transcranial Doppler ultrasound to detect elevated velocities. For children with velocities ≥200 cm/sec, initial monthly blood transfusion therapy for at least a year, followed by the option of hydroxyurea therapy, results in a significant decline in the stroke rate. In Africa, no prior strategy exists for primary stroke prevention because regular blood transfusion therapy is not feasible. We completed a randomized controlled trial for primary stroke prevention using initial low- and moderate-dose hydroxyurea as an alternative to blood transfusion therapy. The trial results demonstrated equal primary stroke prevention efficacy with both doses. After the trial, we provided a state-supported stroke screening service and treatment for over 20,000 children in Kano, Nigeria. We will review the strategies implemented to conduct clinical research and provide humanitarian assistance to children with SCA in Nigeria.
Collapse
|
19
|
Economic evaluation of regular transfusions for cerebral infarct recurrence in the Silent Cerebral Infarct Transfusion Trial. Blood Adv 2021; 5:5032-5040. [PMID: 34607344 PMCID: PMC9153054 DOI: 10.1182/bloodadvances.2021004864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 08/18/2021] [Indexed: 12/03/2022] Open
Abstract
Children with preexisting silent cerebral infarcts on regular transfusion therapy had 50% lower hospitalization costs than standard care. The incremental cost-effectiveness ratio for transfusion therapy to prevent infarct recurrence was $22 025 for every infarct prevented.
In 2020, the American Society of Hematology published evidence-based guidelines for cerebrovascular disease in individuals with sickle cell anemia (SCA). Although the guidelines were based on National Institutes of Health–sponsored randomized controlled trials, no cost-effectiveness analysis was completed for children with SCA and silent cerebral infarcts. We conducted a cost-effectiveness analysis comparing regular blood transfusion vs standard care using SIT (Silent Cerebral Infarct Transfusion) Trial participants. This analysis included a modified societal perspective with direct costs (hospitalization, emergency department visit, transfusion, outpatient care, and iron chelation) and indirect costs (special education). Direct medical costs were estimated from hospitalizations from SIT hospitals and unlinked aggregated hospital and outpatient costs from SIT sites by using the Pediatric Health Information System. Indirect costs were estimated from published literature. Effectiveness was prevention of infarct recurrence. An incremental cost-effectiveness ratio using a 3-year time horizon (mean SIT Trial participant follow-up) compared transfusion vs standard care. A total of 196 participants received transfusions (n = 90) or standard care (n = 106), with a mean age of 10.0 years. Annual hospitalization costs were reduced by 54% for transfusions vs standard care ($4929 vs $10 802), but transfusion group outpatient costs added $22 454 to $137 022 per year. Special education cost savings were $2634 over 3 years for every infarct prevented. Transfusion therapy had an incremental cost-effectiveness ratio of $22 025 per infarct prevented. Children with preexisting silent cerebral infarcts receiving blood transfusions had lower hospitalization costs but higher outpatient costs, primarily associated with the oral iron chelator deferasirox. Regular blood transfusion therapy is cost-effective for infarct recurrence in children with SCA. This trial is registered at www.clinicaltrials.gov as #NCT00072761.
Collapse
|
20
|
John JN, Sid E, Zhu Q. Recurrent Neural Networks to Automatically Identify Rare Disease Epidemiologic Studies from PubMed. AMIA JOINT SUMMITS ON TRANSLATIONAL SCIENCE PROCEEDINGS. AMIA JOINT SUMMITS ON TRANSLATIONAL SCIENCE 2021; 2021:325-334. [PMID: 34457147 PMCID: PMC8378621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Rare diseases affect between 25 and 30 million people in the United States, and understanding their epidemiology is critical to focusing research efforts. However, little is known about the prevalence of many rare diseases. Given a lack of automated tools, current methods to identify and collect epidemiological data are managed through manual curation. To accelerate this process systematically, we developed a novel predictive model to programmatically identify epidemiologic studies on rare diseases from PubMed. A long short-term memory recurrent neural network was developed to predict whether a PubMed abstract represents an epidemiologic study. Our model performed well on our validation set (precision = 0.846, recall = 0.937, AUC = 0.967), and obtained satisfying results on the test set. This model thus shows promise to accelerate the pace of epidemiologic data curation in rare diseases and could be extended for use in other types of studies and in other disease domains.
Collapse
Affiliation(s)
| | - Eric Sid
- Office of Rare Disease Research, National Center for Advancing Translational Sciences (NCATS), National Institutes of Health (NIH), Bethesda, MD
| | - Qian Zhu
- Division of Pre-Clinical Innovation, National Center for Advancing Translational Sciences (NCATS), National Institutes of Health (NIH), Rockville, MD
| |
Collapse
|