![]() This strategy can be applied also to other genes with hot spot regions for disease-causing mutations.ĭr. This approach, outlined in a paper published today in Nature Communications, combines CRISPR-Cas9-mediated genome editing with recombinant adeno-associated serotype 6 (rAAV6) DNA donor vectors to precisely replace the RAG2 coding sequence while preserving regulatory elements. In response, researchers from Bar-Ilan University in Israel propose a novel replacement strategy, termed GE x HDR 2.0: Find and Replace. RAG2 is nuclease involved in DNA cleavage during lymphocyte development, and CRISPR-Cas9 HDR-mediated gene insertion may lead to uncontrolled RAG2 nuclease activity and harmful structural variations. In certain subtypes of SCID, an alternative to HSCT can involve conventional CRISPR-Cas9 HDR-mediated gene insertion, but it carries inherent risks, especially in cases like RAG2-SCID. ![]() One promising genome-editing approach, CRISPR-Cas9 Homology-directed repair (HDR)-mediated GE, offers the potential for precise gene insertion. This development opens the door to therapeutic interventions for a wide range of genomic diseases. The repair process can either disrupt a specific gene or correct it, potentially targeting nearly any gene in the genome. The CRISPR-Cas9 system creates site-specific double-strand breaks in the DNA, allowing for precise gene editing. This cutting-edge gene therapy research offers hope for many genetic disorders such as SCID. The conventional treatment for SCID patients involves allogeneic hematopoietic stem cell transplantation (HSCT), but the challenges of finding compatible donors and potential complications like graft-versus-host disease (GVHD) pose significant hurdles in this approach.Ī groundbreaking solution has emerged with the advent of genome editing (GE), particularly using CRISPR-Cas9 technology. Left untreated, SCID proves fatal within the first year of life. SCID can also affect B-cell and natural killer cell function and counts. Severe Combined Immunodeficiencies (SCIDs) are a group of debilitating primary immunodeficiency disorders, primarily caused by genetic mutations that disrupt T-cell development.
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