Sickle cell disease: A 75-year journey

Sickle cell disease (SCD) is a disorder characterized by the polymerization of hemoglobin chains in the deoxy-form, sickling of red blood cells, and hence vaso-occlusive crisis, multiple organ damage, and increased mortality due to an inherited defect in hemoglobin structure. SCD can also lead to a host of complications, which include acute chest syndrome, avascular necrosis, stroke, pulmonary hypertension, splenic sequestration, gallstones, deep vein thrombosis, pregnancy complications, and end-organ damage. Complications are of varying complexities and can be as grave as life-threatening. According to a report in 2005, the median life expectancy for male and female patients with SCD in the United States (US) was around 42 and 38 years, respectively. However, the survival rate of SCD patients in high-income countries has steadily improved. Treatment options that were mainly for symptomatic relief and led to better well-being of the patient, containment of complication recurrence, and decrease in mortality rates have evolved into curative treatment options such as stem cell transplantations and gene therapy. The present paper is a review of the disease, its complications and implications on the community, and a historical tracking of the evolution of treatment options up to modern-day gene therapy.

- Kato GJ, Piel FB, Reid CD, et al. Sickle Cell Disease. Nature News; 2018. Available from: https://www.nature.com/ articles/nrdp201810 [Last accessed on 2024 Apr 03].
- Billett HH. Hemoglobin and Hematocrit. Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd ed; 1990. Available from: https://www.ncbi.nlm.nih.gov/books/ NBK259 [Last accessed on 2024 Apr 06].
- Mayo Foundation for Medical Education and Research. Sickle Cell Anemia. Mayo Clinic; (n.d.). Available from: https://www.mayoclinic.org/diseases-conditions/sickle-cell-anemia/symptoms-causes/syc-20355876 [Last accessed on 2024 Jun 29].
- Bender MA, Carlberg K. Sickle cell disease. In: Adam MP, Feldman J, Mirzaa GM, Pagon RA, Wallace SE, Amemiya A, editors. GeneReviews®. Seattle, WA: University of Washington, Seattle; 1993-2025.
- Serjeant GR. The natural history of sickle cell disease. Cold Spring Harb Perspect Med. 2013;3:a011783. doi: 10.1101/cshperspect.a011783
- Grosse SD, Odame I, Atrash HK, Amendah DD, Piel FB, Williams TN. Sickle cell disease in Africa: A neglected cause of early childhood mortality. Am J Prev Med. 2011;41(6):S398-S405. doi: 10.1016/j.amepre.2011.09.013
- Inusa BPD, Hsu LL, Kohli N, et al. Sickle cell disease-genetics, pathophysiology, clinical presentation and treatment. Int J Neonatal Screen. 2019;5(2):20. doi: 10.3390/ijns5020020
- US Centers for Disease Controls and Prevention (CDC). Sickle Cell Disease. Available from: https://www.cdc.gov/ sickle-cell/data/index.html [Last accessed on 2024 May 15].
- Ansari J, Moufarrej YE, Pawlinski R, Gavins FN. Sickle cell disease: A malady beyond a hemoglobin defect in cerebrovascular disease. Expert Rev Hematol. 2018;11:45-55. doi: 10.1080/17474086.2018.1407240
- Piel FB, Tatem AJ, Huang Z, Gupta S, Williams TN, Weatherall DJ. Global migration and the changing distribution of sickle haemoglobin: A quantitative study of temporal trends between 1960 and 2000. Lancet Glob Health. 2014;2:e80-e89. doi: 10.1016/S2214-109X(13)70150-5
- Rees DC, Williams TN, Gladwin MT. Sickle-cell disease. Lancet. 2010;376:2018-2031. doi: 10.1016/S0140-6736(10)61029-X
- Steinberg MH, Sebastiani P. Genetic modifiers of sickle cell disease. Am J Hematol. 2012;87:795-803. doi: 10.1002/ajh.23232
- Mohandas N, Evans E. Adherence of sickle erythrocytes to vascular endothelial cells: Requirement for both cell membrane changes and plasma factors. Blood. 1984;64:282-287.
- Fawaz NA, Bashawery L, Al-Sheikh I, Qatari A, Al-Othman SS, Almawi WY. Factor V-Leiden, prothrombin G20210A, and MTHFR C677T mutations among patients with sickle cell disease in Eastern Saudi Arabia. Am J Hematol. 2004;76:307-309. doi: 10.1002/ajh.20087
- Pandey SK, Meena A, Kishor K, Mishra RM, Pandey S, Saxena R. Prevalence of factor V leiden G1691A, MTHFR C677T, and prothrombin G20210A among Asian Indian sickle cell patients. Clin Appl Thromb. 2011;18:320-323. doi: 10.1177/1076029611425830
- Moreira Neto F, Lourenço DM, Noguti MAE, et al. The clinical impact of MTHFR polymorphism on the vascular complications of sickle cell disease. Braz J Med Biol Res. 2006;39:1291-1295. doi: 10.1590/s0100-879x2006001000004
- Horan J, Lerner N. Prediction of adverse outcomes in children with sickle cell disease. N Engl J Med. 2000;342:1612-1613. doi: 10.1056/NEJM200005253422114
- Kaul D, Hebbel R. Hypoxia/reoxygenation causes inflammatory response in transgenic sickle mice but not in normal mice. J Clin Investig. 2000;106:411-420. doi: 10.1172/JCI9225
- Chiang EY, Frenette PS. Sickle cell vaso-occlusion. Hematol Oncol Clin N Am. 2002;9:771-794, 5. doi: 10.1016/j.hoc.2005.08.002
- Frenette PS, Atweh GF. Sickle cell disease: Old discoveries, new concepts, and future promise. J Clin Investig. 2007;117:850-858. doi: 10.1172/JCI30920
- Hebbel RP, Osarogiagbon R, Kaul D. The endothelial biology of sickle cell disease: Inflammation and a chronic vasculopathy. Microcirculation. 2004;11:129-151.
- Elion JE, Brun M, Odievre MH, Lapoumeroulie CL, Krishnamoorthy R. Vaso-occlusion in sickle cell anemia: Role of interactions between blood cells and endothelium. Hematol J. 2004;5:S195-S198. doi: 10.1038/sj.thj.6200452
- Solovey A, Lin Y, Browne P, Choong S, Wayner E, Hebbel RP. Circulating activated endothelial cells in sickle cell anemia. N Engl J Med. 1997;337:1584-1590. doi: 10.1056/NEJM199711273372203
- Mack AK, Kato GJ. Sickle cell disease and nitric oxide: A paradigm shift? Int J Biochem Cell Biol. 2006;38:1237-1243. doi: 10.1016/j.biocel.2006.01.010
- Kato GJ. Defective nitric oxide metabolism in sickle cell disease. Pediatr Blood Cancer. 2014;62:373-374. doi: 10.1002/pbc.25297
- Reiter CD, Wang X, Tanus-Santos JE, et al. Cell-free hemoglobin limits nitric oxide bioavailability in sickle-cell disease. Nat Med. 2002;8:1383-1389. doi: 10.1038/nm1202-799
- Morris CR, Kato GJ, Poljakovic M, et al. Dysregulated arginine metabolism, hemolysis-associated pulmonary hypertension, and mortality in sickle cell disease. JAMA. 2005;294:81-90. doi: 10.1001/jama.294.1.81
- Green D. Thrombogenesis in sickle cell disease. J Lab Clin Med. 1999;134:329-330.
- Stuart MJ, Nagel RL. Sickle-cell disease. Lancet. 2004;364:1343-1360. doi: 10.1016/S0140-6736(04)17192-4
- Odièvre MH, Verger E, Silva-Pinto AC, Elion J. Pathophysiological insights in sickle cell disease. Indian J Med Res. 2011;134:532-537.
- Booth C, Inusa B, Obaro SK. Infection in sickle cell disease: A review. Int J Infect Dis. 2010;14:e2-e12. doi: 10.1016/j.ijid.2009.03.010
- Silva DGH, Junior EB, De Almeida EA, Bonini- Domingos CR. Oxidative stress in sickle cell disease: An overview of erythrocyte redox metabolism and current antioxidant therapeutic strategies. Free Radic Biol Med. 2013;65:1101-1109. doi: 10.1016/j.freeradbiomed.2013.08.181
- Messonnier LA. Mitochondrial function in sickle cell disease. Blood. 2022;139:1616-1617. doi: 10.1182/blood.2021015216
- Kurantsin-Mills J, Ofosu FA, Safa TK, Siegel RS, Lessin LS. Plasma factor VII and thrombin-antithrombin III levels indicate increased tissue factor activity in sickle cell patients. Br J Haematol. 1992;81:539-544. doi: 10.1111/j.1365-2141.1992.tb02989.x
- Peters M., Plaat BE, Cate HT, Wolters HJ, Weening RS, Brandjes DP. Enhanced thrombin generation in children with sickle cell disease. Thromb Haemost. 1994;71:169-172.
- Alkindi S, Al-Ghadani AR, Al-Zeheimi SR, et al. Predicting risk factors for thromboembolic complications in patients with sickle cell anaemia-lessons learned for prophylaxis. J Int Med Res. 2021;49:3000605211055385.
- Nsiri B, Gritli N, Bayoudh F, Messaoud T, Fattoum S, Machghoul S. Abnormalities of coagulation and fibrinolysis in homozygous sickle cell disease. Hematol Cell Ther. 1996;38:279-284. doi: 10.1007/s00282-996-0279-2
- Key NS, Slungaard A, Dandelet L, et al. Whole blood tissue factor procoagulant activity is elevated in patients with sickle cell disease. Blood. 1998;91:4216-4223.
- Westerman MP, Green D, Gilman-Sachs A, et al. Antiphospholipid antibodies, proteins C and S, and coagulation changes in sickle cell disease. J Lab Clin Med. 1999;134:352-362. doi: 10.1016/s0022-2143(99)90149-x
- Setty BNY, Rao AK, Stuart MJ. Thrombophilia in sickle cell disease: The red cell connection. Blood. 2001;98:3228-3233. doi: 10.1182/blood.v98.12.3228
- Noubouossie D, Key NS, Ataga KI. Coagulation abnormalities of sickle cell disease: Relationship with clinical outcomes and the effect of disease modifying therapies. Blood Rev. 2016;30:245-256. doi: 10.1016/j.blre.2015.12.003
- Tomer A, Harker LA, Kasey S, Eckman JR. Thrombogenesis in sickle cell disease. J Lab Clin Med. 2001;137:398-407. doi: 10.1067/mlc.2001.115450
- Adekile A, Gupta R, Yacoub F, Sinan T, Al-Bloushi M, Haider M. Avascular necrosis of the hip in children with sickle cell disease and high Hb F: Magnetic resonance imaging findings and influence of alpha-thalassemia trait. Acta Haematol. 2001;105:27-31. doi: 10.1159/000046529
- Marouf R, Gupta R, Haider M, Al-Wazzan H, Adekile A. Avascular necrosis of the femoral head in adult Kuwaiti sickle cell disease patients. Acta Haematol. 2003;110:11-15. doi: 10.1159/000072406
- Almeida A, Roberts I. Bone involvement in sickle cell disease. Br J Haematol. 2005;129:482-490. doi: 10.1111/j.1365-2141.2005.05476.x
- Mahadeo KM, Oyeku S, Taragin B, et al. Increased prevalence of osteonecrosis of the femoral head in children and adolescents with sickle-cell disease. Am J Hematol. 2011;86:806-808. doi: 10.1002/ajh.22103
- Tantawy AA, Ibrahim SW, Abdel-Aziz TT, Rabie AN, Makkeyah SM, Ragab IA. Inner ear complications in children and adolescents with sickle cell disease. Hemoglobin. 2020;44:411-417. doi: 10.1080/03630269.2020.1837863
- Burnett MW, Bass JW, Cook BA. Etiology of osteomyelitis complicating sickle cell disease. Pediatrics. 1998;101:296-297. doi: 10.1542/peds.101.2.296
- Neonato MG, Guilloud-Bataille M, Beauvais P, et al. Acute clinical events in 299 homozygous sickle cell patients living in France. French study group on sickle cell disease. Eur J Haematol. 2000;65:155-164. doi: 10.1034/j.1600-0609.2000.90210.x
- Kirkham FJ, DeBaun MR. Stroke in children with sickle cell disease. Curr Treat Options Neurol. 2004;6:357-375. doi: 10.1007/s11940-996-0028-4
- Friend A, Settelmeyer TP, Girzadas D. Acute Chest Syndrome. In: StatPearls. Treasure Island, FL: StatPearls Publishing; 2024. Available from: https://www.ncbi.nlm.nih. gov/books/NBK441872 [Last accessed on 2023 Nov 25].
- Charache S. “Acute chest syndrome” in adults with sickle cell anemia. Microbiology, treatment, and prevention. Arch Intern Med. 1979;139:67-69. doi: 10.1001/archinte.1979.03630380047016
- Barrett-Connor E. Acute pulmonary disease and sickle cell anemia. Am Rev Respir Dis. 1971;104:159-165. doi: 10.1164/arrd.1971.104.2.159
- Gray A, Anionwu EN, Davies SC, Brozovic M. Patterns of mortality in sickle cell disease in the United Kingdom. J Clin Pathol. 1991;44:459-463. doi: 10.1136/jcp.44.6.459
- Babiker MA, Obeid HA, Ashong EF. Acute reversible pulmonary ischemia. A cause of the acute chest syndrome in sickle cell disease. Clin Pediatr (Phila). 1985;24:716-718. doi: 10.1177/000992288502401209
- Aldrich TK, Dhuper SK, Patwa NS, et al. Pulmonary entrapment of sickle cells: The role of regional alveolar hypoxia. J Appl Physiol. 1996;80:531-539. doi: 10.1152/jappl.1996.80.2.531
- Chaturvedi S, Ghafuri DL, Glassberg J, et al. Rapidly progressive acute chest syndrome in individuals with sickle cell anemia: A distinct acute chest syndrome phenotype. Am J Hematol. 2016;91:1185-1190. doi: 10.1002/ajh.24539
- Bhalla M, Abboud MR, McLoud TC, et al. Acute chest syndrome in sickle cell disease: CT evidence of microvascular occlusion. Radiology. 1993;187:45-49. doi: 10.1148/radiology.187.1.8451435
- Nur E, Gaartman AE, Van Tuijn CFJ, Tang MW, Biemond BJ. Vaso-occlusive crisis and acute chest syndrome in sickle cell disease due to 2019 novel coronavirus disease (COVID-19). Am J Hematol. 2020;95:725-726. doi: 10.1002/ajh.25821
- Vichinsky EP, Neumayr LD, Earles AN, et al. Causes and outcomes of the acute chest syndrome in sickle cell disease. National acute chest syndrome study group. N Engl J Med. 2000;342:1855-1865. doi: 10.1056/NEJM200006223422502
- Graham LM Jr. The effect of sickle cell disease on the lung. Clin Pulm Med. 2004;11:369.
- Powars D, Weidman JA, Odom-Maryon T, Niland JC, Johnson C. Sickle cell chronic lung disease: Prior morbidity and the risk of pulmonary failure. Medicine (Baltimore). 1988;67:66-76.
- Castro O, Brambilla DJ, Thorington B, et al. The acute chest syndrome in sickle cell disease: Incidence and risk factors. The cooperative study of sickle cell disease. Blood. 1994;84:643-649.
- Vichinsky EP, Styles LA, Colangelo LH, et al. Acute chest syndrome in sickle cell disease: Clinical presentation and course. Cooperative study of sickle cell disease. Blood. 1997;89:1787.
- Howard J, Hart N, Roberts-Harewood M, Cummins M, Awogbade M, Davis B. The BCSH committee guideline on the management of acute chest syndrome in sickle cell disease. Br J Haematol. 2015;169:492-505.
- Obaro SK, Iroh Tam PY. Preventing infections in sickle cell disease: The unfinished business. Pediat Blood Cancer. 2016;63:781-785. doi: 10.1002/pbc.25911
- De Ceulaer K, Pagliuca A, Forbes M, Maude G, Serjeant B, Serjeant G. Recurrent infections in sickle cell disease: Haematological and immune studies. Clin Chim Acta. 1985;148:161-165. doi: 10.1016/0009-8981(85)90142-1
- Switzer JA, Hess DC, Nichols FT, Adams RJ. Pathophysiology and treatment of stroke in sickle-cell disease: Present and future. Lancet Neurol. 2006;5:501-512. doi: 10.1016/S1474-4422(06)70469-0
- Anson JA, Koshy M, Ferguson L, Crowell RM. Subarachnoid hemorrhage in sickle-cell disease. J Neurosurg. 1991;75:552-558. doi: 10.3171/jns.1991.75.4.0552
- De Baun MR, Kirkham FJ. Central nervous system complications and management in sickle cell disease. Blood. 2016;127:829-838. doi: 10.1182/blood-2015-09-618579
- De Baun MR, Armstrong FD, McKinstry RC, Ware RE, Vichinsky E, Kirkham F. Silent cerebral infarcts: A review on a prevalent and progressive cause of neurologic injury in sickle cell anemia. Blood. 2012;119:4587-4596. doi: 10.1182/blood-2011-02-272682
- Ohene-Frempong K, Weiner SJ, Sleeper LA, et al. Cerebrovascular accidents in sickle cell disease: Rates and risk factors. Blood. 1998;91:288-294.
- Sachdev V, Rosing DR, Thein SL. Cardiovascular complications of sickle cell disease. Trends Cardiovasc Med. 2020;31:187-193. doi: 10.1016/j.tcm.2020.02.002
- Palomarez A, Jha M, Medina Romero X, Horton RE. Cardiovascular consequences of sickle cell disease. Biophys Rev (Melville). 2022;3(3):031302. doi: 10.1063/5.0094650
- Grossman W, Jones D, McLaurin LP. Wall stress and patterns of hypertrophy in the human left ventricle. J Clin Investig. 1975;56:56-64. doi: 10.1172/JCI108079
- Teresa SM, Feld L, Dhar A, et al. Cardiopulmonary Complications of Sickle Cell Disease in Children. Current Practices in Sickle Cell Disease. IntechOpen; 2024. Available from: https://www.intechopen.com/chapters/1182476 [Last accessed on 2024 Aug 11]. doi: 10.5772/intechopen.1005507
- Balfour IC, Covitz W, Arensman FW, Eubig C, Garrido M, Jones C. Left ventricular filling in sickle cell anemia. Am J Cardiol. 1988;61:395-399. doi: 10.1016/0002-9149(88)90952-6
- Hankins JS, McCarville MB, Hillenbrand C, et al. Ventricular diastolic dysfunction in sickle cell anemia is common but not associated with myocardial iron deposition. Pediatr Blood Cancer. 2010;55:495-500. doi: 10.1002/pbc.22587
- Johnson MC, Kirkham F, Redline S, et al. Left ventricular hypertrophy and diastolic dysfunction in children with sickle cell disease are related to asleep and waking oxygen desaturation. Blood. 2010;116:16-21. doi: 10.1182/blood-2009-06-227447
- Chinawa JM, Chukwu BF, Chinawa AT, et al. Right ventricular function among South East Nigeria children with sickle cell anaemia. BMC Pediatr. 2020;20:240. doi: 10.1186/s12887-020-02143-4
- Osegbe DN. Haematuria and sickle cell disease. A report of 12 cases and review of the literature. Trop Geogr Med. 1990;42:22-27.
- Scheinman JI. Sickle cell disease and the kidney. Nat Clin Pract Nephrol. 2009;5:78-88. doi: 10.1038/ncpneph1008
- Gebreselassie S, Simmons MN, Montague DK. Genitourinary manifestations of sickle cell disease. Cleve Clin J Med. 2015;82(10):679-683. doi: 10.3949/ccjm.82a.14029
- Odita JC, Ugbodaga CI, Okafor LA, Ojogwu LI, Ogisi OA. Urographic changes in homozygous sickle cell disease. Diagn Imaging. 1983;52:259-263.
- Walker TM, Serjeant GR. Increased renal reflectivity in sickle cell disease: Prevalence and characteristics. Clin Radiol. 1995;50:56669. doi: 10.1016/s0009-9260(05)83194-0
- Baddam S, Aban I, Hilliard L, Howard T, Askenazi D, Lebensburger JD. Acute kidney injury during a pediatric sickle cell vaso-occlusive pain crisis. Pediatr Nephrol. 2017;32:1451-1456. doi: 10.1007/s00467-017-3623-6
- Anele U, Burnett AL. Erectile dysfunction after sickle cell disease-associated recurrent ischemic priapism: Profile and risk factors. J Sex Med. 2015;12:713-719. doi: 10.1111/jsm.12816
- Mantadakis E, Cavender JD, Rogers ZR, Ewalt DH, Buchanan GR. Prevalence of priapism in children and adolescents with sickle cell anemia. J Pediatr Hematol. 1999;21:518-522.
- Kato GJ. Priapism in sickle-cell disease: A hematologist’s perspective. J Sex Med. 2012;9:70-78. doi: 10.1111/j.1743-6109.2011.02287.x
- Allali S, De Montalembert M, Brousse V, et al. Hepatobiliary complications in children with sickle cell disease: A retrospective review of medical records from 616 patients. J Clin Med. 2019;8(9):1481. doi: 10.3390/jcm8091481
- Martins RA, Soares RS, De Vito FB, et al. Cholelithiasis and its complications in sickle cell disease in a university hospital. Rev Bras Hematol Hemoter. 2017;39:28-31. doi: 10.1016/j.bjhh.2016.09.009
- Essien EA, Winter-Eteng BF, Onukogu CU, Nkangha DD, Daniel FM. Psychosocial challenges of persons with sickle cell anemia: A narrative review. Medicine (Baltimore). 2023;102(47):e36147. doi: 10.1097/MD.0000000000036147
- Vinjamur DS, Bauer DE, Orkin SH. Recent progress in understanding and manipulating haemoglobin switching for the haemoglobinopathies. Br J Haematol. 2018;180:630-643. doi: 10.1111/bjh.15038
- Migotsky M, Beestrum M, Badawy SM. Recent Advances in sickle-cell disease therapies: A review of voxelotor, crizanlizumab, and l-glutamine. Pharmacy (Basel). 2022;10(5):123. doi: 10.3390/pharmacy10050123
- King SB. N-hydroxyurea and acyl nitroso compounds as nitroxyl (HNO) and nitric oxide (NO) donors. Curr Top Med Chem. 2005;5:665-673. doi: 10.2174/1568026054679362
- Eaton WA, Bunn HF. Treating sickle cell disease by targeting HbS polymerization. Blood. 2017;129:2719-2726. doi: 10.1182/blood-2017-02-765891
- Čokić V, Smith RD, Beleslin-Cokic BB, et al. Hydroxyurea induces fetal hemoglobin by the nitric oxide-dependent activation of soluble guanylyl cyclase. J Clin Investig. 2003;111:231-239. doi: 10.1172/JCI16672.
- Nevitt SJ, Jones AP, Howard J. Hydroxyurea (hydroxycarbamide) for sickle cell disease. Cochrane Database Syst Rev. 2017;2017:CD002202. doi: 10.1002/14651858.CD002202.pub2
- Agrawal RK, Patel RK, Shah V, Nainiwal L, Trivedi B. Hydroxyurea in sickle cell disease: Drug review. Indian J Hematol Blood Transfus. 2014;30(2):91-96. doi: 10.1007/s12288-013-0261-4
- Tanhehco YC, Shi PA, Schwartz J. Transfusion therapy in sickle cell disease. Ann Blood. 2022;7:9.
- Linder GE, Chou ST. Red cell transfusion and alloimmunization in sickle cell disease. Haematologica. 2021;106:1805-1815. doi: 10.3324/haematol.2020.270546
- Elenga N, Loko G, Etienne-Julan M, Al-Okka R, Adel AM, Yassin MA. Real-World data on efficacy of L-glutamine in preventing sickle cell disease-related complications in pediatric and adult patients. Front Med. 2022;9:931925. doi: 10.3389/fmed.2022.931925
- Vichinsky E, Hoppe CC, Ataga KI, et al. A phase 3 Randomized trial of voxelotor in sickle cell disease. N Engl J Med. 2019;381(6):509-519. doi: 10.1056/NEJMoa1903212
- FDA News Release. FDA is Alerting Patients and Health Care Professionals About the Voluntary Withdrawal of Oxbryta from the Market Due to Safety Concerns; 2024. Available from: https://www.fda.gov/drugs/drug-safety-and-availability/ fda-alerting-patients-and-health-care-professionals-about-voluntary-withdrawal-oxbryta-market-due [Last accessed on 2024 Dec 03].
- Sagi V, Mittal A, Tran H, Gupta K. Pain in sickle cell disease: Current and potential translational therapies. Transl Res. 2021;234:141-158. doi: 10.1016/j.trsl.2021.03.007
- Dampier CD, Telen MJ, Wun T, et al. A randomized clinical trial of the efficacy and safety of rivipansel for sickle cell vaso-occlusive crisis. Blood. 2023;141(2):168-179. doi: 10.1182/blood.2022015797
- Rees CA, Brousseau DC, Cohen DM, et al. Sickle cell disease treatment with Arginine Therapy (STArT): Study protocol for a phase 3 randomized controlled trial. Trials. 2023;24(1):538. doi: 10.1186/s13063-023-07538-z
- Goksel E, Ugurel E, Nader E, et al. A preliminary study of phosphodiesterases and adenylyl cyclase signaling pathway on red blood cell deformability of sickle cell patients. Front Physiol. 2023;14:1215835. doi: 10.3389/fphys.2023.1215835
- McArthur JG, Svenstrup N, Chen C, et al. A novel, highly potent and selective phosphodiesterase-9 inhibitor for the treatment of sickle cell disease. Haematologica. 2020;105:623-631. doi: 10.3324/haematol.2018.213462
- Ndefo UA, Maxwell AE, Nguyen H, Chiobi TL. Pharmacological management of sickle cell disease. P T. 2008;33(4):238-243.
- Eastep TG, Kendsersky RM, Zook J, Moore A. Penicillin prophylaxis in patients with sickle cell disease beyond age 5 years. J Pediatr Pharmacol Ther. 2023;28(6):519-523. doi: 10.5863/1551-6776-28.6.519
- Ashorobi D, Naha K, Bhatt R. Hematopoietic Stem Cell Transplantation in Sickle Cell Disease. In: StatPearls; 2023. Available from: https://www.ncbi.nlm.nih.gov/books/ NBK538515 [Last accessed on 2024 Nov 07].
- Leonard A, Tisdale JF. Stem cell transplantation in sickle cell disease: Therapeutic potential and challenges faced. Expert Rev Hematol. 2018;11(7):547-565. doi: 10.1080/17474086.2018.1486703
- FDA News Release. FDA Approves First Gene Therapies to Treat Patients with Sickle Cell Disease; 2023. Available from: https://www.fda.gov/news-events/press-announcements/ fda-approves-first-gene-therapies-treat-patients-sickle-cell-disease [Last accessed on 2024 Nov 06].
- Hsieh MM, Kang EM, Fitzhugh CD, et al. Allogeneic hematopoietic stem-cell transplantation for sickle cell disease. N Engl J Med. 2009;361(24):2309-2317. doi: 10.1056/NEJMoa0904971
- Hsieh MM, Fitzhugh CD, Tisdale JF. Allogeneic hematopoietic stem cell transplantation for sickle cell disease: The time is now. Blood. 2011;118(5):1197-1207. doi: 10.1182/blood-2011-01-332510
- Saraf SL, Oh AL, Patel PR, et al. Nonmyeloablative stem cell transplantation with alemtuzumab/low-dose irradiation to cure and improve the quality of life of adults with sickle cell disease. Biol Blood Marrow Transplant. 2016;22(3):441-448. doi: 10.1016/j.bbmt.2015.08.036
- Fliesler N. Sickle cell Gene Therapy and Boosting Fetal Hemoglobin: A 75-Year History. Boston Children’s Hospital; 2023. Available from: https://answers.childrenshospital. org/sickle-cell-fetal-hemoglobin-timeline [Last accessed on 2024 Apr 06].
- Platt OS, Brambilla DJ, Rosse WF, et al. Mortality in sickle cell disease. Life expectancy and risk factors for early death. N Engl J Med. 1994;330:1639. doi: 10.1056/NEJM199406093302303
- Lanzkron S, Carroll CP, Haywood C Jr. Mortality rates and age at death from sickle cell disease: U.S., 1979-2005. Public Health Rep. 2013;128:110-116. doi: 10.1177/003335491312800206