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Aslan C, Zolbanin NM, Faraji F, Jafari R. Exosomes for CRISPR-Cas9 Delivery: The Cutting Edge in Genome Editing. Mol Biotechnol 2023:10.1007/s12033-023-00932-7. [PMID: 38012525 DOI: 10.1007/s12033-023-00932-7] [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: 04/03/2023] [Accepted: 10/02/2023] [Indexed: 11/29/2023]
Abstract
Gene mutation correction was challenging until the discovery of clustered regularly interspaced short palindromic repeats (CRISPR) and CRISPR-associated protein (Cas). CRISPR is a new era for genome modification, and this technology has bypassed the limitations of previous methods such as zinc-finger nuclease and transcription activator-like effector nuclease. Currently, this method is becoming the method of choice for gene-editing purposes, especially therapeutic gene editing in diseases such as cardiovascular, neurological, renal, genetic, optical, and stem cell, as well as blood disorders and muscular degeneration. However, finding the optimum delivery system capable of carrying this large complex persists as the main challenge of this technology. Therefore, it would be ideal if the delivery vehicle could direct the introduction of editing functions to specific cells in a multicellular organism. Exosomes are membrane-bound vesicles with high biocompatibility and low immunogenicity; they offer the best and most reliable way to fill the CRISPR/Cas9 system delivery gap. This review presents the current evidence on the molecular mechanisms and challenges of CRISPR/Cas9-mediated genome modification. Also, the role of CRISPR/Cas9 in the development of treatment and diagnosis of numerous disorders, from malignancies to viral infections, has been discussed. Lastly, the focus is on new advances in exosome-delivery technologies that may play a role in CRISPR/Cas9 delivery for future clinical settings.
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Affiliation(s)
- Cynthia Aslan
- Research Center for Integrative Medicine in Aging, Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Naime Majidi Zolbanin
- Experimental and Applied Pharmaceutical Sciences Research Center, Urmia University of Medical Sciences, Urmia, Iran
- Department of Pharmacology and Toxicology, School of Pharmacy, Urmia University of Medical Sciences, Urmia, Iran
| | - Fatemeh Faraji
- Hazrat-e Rasool General Hospital, Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Iran University of Medical Sciences, Floor 3, Building No. 3, Niyayesh St, Sattar Khan St, Tehran, 1445613131, Iran.
| | - Reza Jafari
- Cellular and Molecular Research Center, Cellular and Molecular Medicine Research Institute, Clinical Research Institute, Urmia University of Medical Sciences, Shafa St., Ershad Blvd., P.O. Box: 1138, Urmia, 57147, Iran.
- Department of Immunology and Genetics, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran.
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CRISPR Gene Therapy: A Promising One-Time Therapeutic Approach for Transfusion-Dependent β-Thalassemia—CRISPR-Cas9 Gene Editing for β-Thalassemia. THALASSEMIA REPORTS 2023. [DOI: 10.3390/thalassrep13010006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
β-Thalassemia is an inherited hematological disorder that results from genetic changes in the β-globin gene, leading to the reduced or absent synthesis of β-globin. For several decades, the only curative treatment option for β-thalassemia has been allogeneic hematopoietic cell transplantation (allo-HCT). Nonetheless, rapid progress in genome modification technologies holds great potential for treating this disease and will soon change the current standard of care for β-thalassemia. For instance, the emergence of the CRISPR/Cas9 genome editing platform has opened the door for precision gene editing and can serve as an effective molecular treatment for a multitude of genetic diseases. Investigational studies were carried out to treat β-thalassemia patients utilizing CRISPR-based CTX001 therapy targeting the fetal hemoglobin silencer BCL11A to restore γ-globin expression in place of deficient β-globin. The results of recently carried out clinical trials provide hope of CTX001 being a promising one-time therapeutic option to treat β-hemoglobinopathies. This review provides an insight into the key scientific steps that led to the development and application of novel CRISPR/Cas9–based gene therapies as a promising therapeutic platform for transfusion-dependent β-thalassemia (TDT). Despite the resulting ethical, moral, and social challenges, CRISPR provides an excellent treatment option against hemoglobin-associated genetic diseases.
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Samuelson C, Radtke S, Zhu H, Llewellyn M, Fields E, Cook S, Huang MLW, Jerome KR, Kiem HP, Humbert O. Multiplex CRISPR/Cas9 genome editing in hematopoietic stem cells for fetal hemoglobin reinduction generates chromosomal translocations. Mol Ther Methods Clin Dev 2021; 23:507-523. [PMID: 34853798 PMCID: PMC8605315 DOI: 10.1016/j.omtm.2021.10.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 10/20/2021] [Accepted: 10/26/2021] [Indexed: 12/26/2022]
Abstract
Sickle cell disease and β-thalassemia are common monogenic disorders that cause significant morbidity and mortality globally. The only curative treatment currently is allogeneic hematopoietic stem cell transplantation, which is unavailable to many patients due to a lack of matched donors and carries risks including graft-versus-host disease. Genome editing therapies targeting either the BCL11A erythroid enhancer or the HBG promoter are already demonstrating success in reinducing fetal hemoglobin. However, where a single locus is targeted, reliably achieving levels high enough to deliver an effective cure remains a challenge. We investigated the application of a CRISPR/Cas9 multiplex genome editing approach, in which both the BCL11A erythroid enhancer and HBG promoter are disrupted within human hematopoietic stem cells. We demonstrate superior fetal hemoglobin reinduction with this dual-editing approach without compromising engraftment or lineage differentiation potential of edited cells post-xenotransplantation. However, multiplex editing consistently resulted in the generation of chromosomal rearrangement events that persisted in vivo following transplantation into immunodeficient mice. The risk of oncogenic events resulting from such translocations therefore currently prohibits its clinical translation, but it is anticipated that, in the future, alternative editing platforms will help alleviate this risk.
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Affiliation(s)
- Clare Samuelson
- Stem Cell and Gene Therapy Program, Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA
| | - Stefan Radtke
- Stem Cell and Gene Therapy Program, Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA
| | - Haiying Zhu
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA 98195, USA
| | - Mallory Llewellyn
- Stem Cell and Gene Therapy Program, Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA
| | - Emily Fields
- Stem Cell and Gene Therapy Program, Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA
| | - Savannah Cook
- Stem Cell and Gene Therapy Program, Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA
| | - Meei-Li W. Huang
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA 98195, USA
| | - Keith R. Jerome
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA 98195, USA
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle WA 98109-1024, USA
| | - Hans-Peter Kiem
- Stem Cell and Gene Therapy Program, Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA
- Department of Medicine, University of Washington, Seattle, WA 98195, USA
| | - Olivier Humbert
- Stem Cell and Gene Therapy Program, Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA
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