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Youssry I, Ayad N. Sickle cell disease: combination new therapies vs. CRISPR-Cas9 potential and challenges - review article. Ann Hematol 2024; 103:2613-2619. [PMID: 37867187 DOI: 10.1007/s00277-023-05510-0] [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: 06/16/2023] [Accepted: 10/12/2023] [Indexed: 10/24/2023]
Abstract
In 2022, sickle cell disease (SCD) continues to affect the lives of millions of people, being one of the most frequently inherited blood disorders worldwide. Recently, several new therapies have been FDA approved for the treatment of SCD. The complexity of the pathophysiology of sickling has given opportunity to the evolution of several modalities of therapies. Nonetheless, the potential for complementary targeting of HbS polymerization, vasocclusion, and other inflammatory pathways remains controversial. None of these drugs can be considered a single curative line of treatment. With the advancement of CRISPR/Cas9 technology, autologous transplant of gene-edited hematopoietic stem cells could possibly provide a cure for most patients with SCD. The advantage of this approach over the conventional stem cell transplantation is that it decreases the need for immuno-suppressive drugs and the risk of graft-versus-host disease. In addition, recent technological advances can reduce the off-target effects, but long-term monitoring is needed to ensure the reliability of these methods in the clinical setting. This review explores the efficacy and safety of combination therapies and contrasting this alternative with the challenges that exist with sickle cell gene therapy using CRISPR.
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Affiliation(s)
- Ilham Youssry
- Pediatric Hematology and BMT Unit, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Nardeen Ayad
- Pediatric Hematology and BMT Unit, Faculty of Medicine, Cairo University, Cairo, Egypt.
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Condé M, Lespessailles E, Wanneveich M, Allemandou D, Boulain T, Dimitrov G. Effect of nutritional supplementation on bone mineral density in children with sickle cell disease: protocol for an open-label, randomised controlled clinical trial. BMJ Open 2024; 14:e080235. [PMID: 38580373 PMCID: PMC11002356 DOI: 10.1136/bmjopen-2023-080235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 03/16/2024] [Indexed: 04/07/2024] Open
Abstract
INTRODUCTION Children with sickle cell disease show a significant decrease in bone mineral density, an increase in resting energy expenditure of more than 15%, a decrease in fat and lean mass as well as a significant increase in protein turnover, particularly in bone tissue. This study aims to evaluate the effectiveness of an increase in food intake on bone mineral density and the clinical and biological complications of paediatric sickle cell disease. METHODS AND ANALYSIS The study is designed as an open-label randomised controlled clinical trial conducted in the Paediatrics Unit of the Orléans University Hospital Centre. Participants aged 3-16 years will be randomly divided into two groups: the intervention group will receive oral nutritional supplements (pharmacological nutritional hypercaloric products) while the control group will receive age-appropriate and gender-appropriate nutritional intake during 12 months. Total body less head bone mineral density will be measured at the beginning and the end of the trial. A rigorous nutritional follow-up by weekly 24 hours recall dietary assessment and planned contacts every 6 weeks will be carried out throughout the study. A school absenteeism questionnaire, intended to reflect the patient's school productivity, will be completed by participants and parents every 3 months. Blood samples of each patient of both groups will be stocked at the beginning and at the end of the trial, for future biological trial. Clinical and biological complications will be regularly monitored. ETHICS AND DISSEMINATION The protocol has been approved by the French ethics committee (Comité de Protection des Personnes Sud-Ouest et Outre-Mer 2, Toulouse; approval no: 2-20-092 id9534). Children and their parents will give informed consent to participate in the study before taking part. Results will be disseminated through peer-reviewed journals or international academic conferences. TRIAL REGISTRATION NUMBER NCT04754711.
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Affiliation(s)
- Mohamed Condé
- Paediatrics, Centre Hospitalier Régional d'Orléans, Orléans, France
| | | | - Mathilde Wanneveich
- Statistics Department, Centre Hospitalier Régional d'Orléans, Orléans, France
| | - Delphine Allemandou
- Nutrition Department, Centre Hospitalier Régional d'Orléans, Orléans, France
| | - Thierry Boulain
- Medical Intensive Care Unit, Centre Hospitalier Régional d'Orléans, Orléans, France
| | - Georges Dimitrov
- Paediatrics, Centre Hospitalier Régional d'Orléans, Orleans, France
- Paediatric Surgery, Centre Hospitalier Régional d'Orléans, Orléans, France
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Xu F, Zheng C, Xu W, Zhang S, Liu S, Chen X, Yao K. Breaking genetic shackles: The advance of base editing in genetic disorder treatment. Front Pharmacol 2024; 15:1364135. [PMID: 38510648 PMCID: PMC10953296 DOI: 10.3389/fphar.2024.1364135] [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: 01/01/2024] [Accepted: 02/26/2024] [Indexed: 03/22/2024] Open
Abstract
The rapid evolution of gene editing technology has markedly improved the outlook for treating genetic diseases. Base editing, recognized as an exceptionally precise genetic modification tool, is emerging as a focus in the realm of genetic disease therapy. We provide a comprehensive overview of the fundamental principles and delivery methods of cytosine base editors (CBE), adenine base editors (ABE), and RNA base editors, with a particular focus on their applications and recent research advances in the treatment of genetic diseases. We have also explored the potential challenges faced by base editing technology in treatment, including aspects such as targeting specificity, safety, and efficacy, and have enumerated a series of possible solutions to propel the clinical translation of base editing technology. In conclusion, this article not only underscores the present state of base editing technology but also envisions its tremendous potential in the future, providing a novel perspective on the treatment of genetic diseases. It underscores the vast potential of base editing technology in the realm of genetic medicine, providing support for the progression of gene medicine and the development of innovative approaches to genetic disease therapy.
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Affiliation(s)
- Fang Xu
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, China
- College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, China
| | - Caiyan Zheng
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, China
- College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, China
| | - Weihui Xu
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, China
- College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, China
| | - Shiyao Zhang
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, China
- College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, China
| | - Shanshan Liu
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, China
- College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, China
| | - Xiaopeng Chen
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, China
- College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, China
| | - Kai Yao
- Institute of Visual Neuroscience and Stem Cell Engineering, Wuhan University of Science and Technology, Wuhan, China
- College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan, China
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Vallée T, Schmid I, Gloning L, Bacova M, Ahrens J, Feuchtinger T, Klein C, Gaertner VD, Albert MH. Excellent outcome of stem cell transplantation for sickle cell disease. Ann Hematol 2023; 102:3217-3227. [PMID: 37726493 PMCID: PMC10567813 DOI: 10.1007/s00277-023-05447-4] [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: 06/15/2023] [Accepted: 09/07/2023] [Indexed: 09/21/2023]
Abstract
Many sickle cell disease (SCD) patients lack matched family donors (MFD) or matched unrelated donors (MUD), implying haploidentical donors (MMFD) as a logical donor choice. We used a reduced toxicity protocol for all donor types. We included 31 patients (2-22 years) with MFD (n = 15), MMFD (10), or MUD (6) HSCT and conditioning with alemtuzumab/ATG, thiotepa, fludarabine and treosulfan, and post-transplant cyclophosphamide for MMFD. After the initial six patients, treosulfan was replaced by targeted busulfan (AUC 65-75 ng*h/ml). After a median follow-up of 26 months (6-123), all patients are alive and off immunosuppression. Two MMFD patients experienced secondary graft failure with recurrence of SCD, both after treosulfan conditioning. Neither acute GVHD ≥ °III nor moderate/severe chronic GVHD was observed. The disease-free, severe GVHD-free survival was 100%, 100%, and 80% in the MFD, MUD, and MMFD groups, respectively (p = 0.106). There was a higher rate of virus reactivation in MMFD (100%) and MUD (83%) compared to MFD (40%; p = 0.005), but not of viral disease (20% vs 33% vs 13%; p = 0.576). Six patients had treosulfan-based conditioning, two of whom experienced graft failure (33%), compared to 0/25 (0%) after busulfan-based conditioning (p = 0.032). Donor chimerism was ≥ 80% in 28/31 patients (90%) at last follow-up. Reduced toxicity myeloablative conditioning resulted in excellent overall survival, negligible GVHD, and low toxicity among all donor groups in pediatric and young adult patients with SCD.
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Affiliation(s)
- Tanja Vallée
- Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, LMU Munich, Lindwurmstr. 4, 80337, Munich, Germany
| | - Irene Schmid
- Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, LMU Munich, Lindwurmstr. 4, 80337, Munich, Germany
| | - Lisa Gloning
- Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, LMU Munich, Lindwurmstr. 4, 80337, Munich, Germany
| | - Martina Bacova
- Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, LMU Munich, Lindwurmstr. 4, 80337, Munich, Germany
| | - Jutta Ahrens
- Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, LMU Munich, Lindwurmstr. 4, 80337, Munich, Germany
| | - Tobias Feuchtinger
- Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, LMU Munich, Lindwurmstr. 4, 80337, Munich, Germany
| | - Christoph Klein
- Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, LMU Munich, Lindwurmstr. 4, 80337, Munich, Germany
| | - Vincent D Gaertner
- Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, LMU Munich, Lindwurmstr. 4, 80337, Munich, Germany
| | - Michael H Albert
- Department of Pediatrics, Dr. Von Hauner Children's Hospital, University Hospital, LMU Munich, Lindwurmstr. 4, 80337, Munich, Germany.
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Gallaway KA, Sakon C, Ongeri J, Patel KS, Oliver J, Patacca H, O'Brien ARW, Skaar TC, Tillman EM. Opportunity for pharmacogenetics testing in patients with sickle cell anemia. Pharmacogenomics 2022; 23:925-931. [DOI: 10.2217/pgs-2022-0115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Background: Patients with sickle cell disease (SCD) are exposed to numerous drugs over their lifespan, and many of these drugs have Clinical Pharmacogenetics Implementation Consortium (CPIC) guidelines for personalized dosing. The authors' aim was to ascertain the number of drugs with CPIC guidelines prescribed to SCD patients. Materials & methods: A search of Indiana University Health affiliated hospitals' electronic medical record identified 957 patients with a diagnosis of SCD. Drugs or drug classes with CPIC actionable guidelines ordered as inpatient and outpatient prescriptions were collected from SCD patients. Results: During the 16-year period, 892 (93%) patients received at least one drug that could have been dosed according to CPIC guidelines. Conclusion: Preemptive pharmacogenetics testing should be considered in SCD patients in order to utilize these data throughout the patient's life.
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Affiliation(s)
- Katherine A Gallaway
- Division of Pediatric Critical Care, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Colleen Sakon
- Pharmacy Department, Indiana University Health, Indianapolis, IN 46202, USA
| | - Jefney Ongeri
- Division of Clinical Pharmacology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Krina S Patel
- Division of Clinical Pharmacology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Johnathan Oliver
- Division of Clinical Pharmacology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Heather Patacca
- Division of Clinical Pharmacology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Andrew RW O'Brien
- Division of Hematology and Oncology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Todd C Skaar
- Division of Clinical Pharmacology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Emma M Tillman
- Division of Clinical Pharmacology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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