CRISPR-Cas technologies have drastically revolutionized genetic engineering and also dramatically changed the potential for treating inherited disorders. The potential to correct genetic mutations responsible for numerous hereditary disorders from single-gene disorders to complex polygenic diseases through precise DNA editing is feasible. The tactic now employed in CRISPR-Cas systems for treating inherited disorders is the usage of particular guide RNAs to target and edit disease-causing mutations in the patient's genome. Several methods such as CRISPR-Cas9, CRISPR-Cas12, and CRISPR-Cas13 are being thoroughly researched and optimized to increase effectiveness, accuracy, and safety in gene editing. Additionally, it is predicted that CRISPR-based therapies will be able to treat complex genetic illnesses such as cancer predisposition syndromes, neurological disorders, and cardiovascular conditions in addition to single-gene disorders. The available editing tools and creation of base editing technology facilitate the simultaneous correction of many mutations or accurate nucleotide changes leading to further advances in the development of multiplex editing tools and base editing technology fiction. When combined with other paradigms such as gene therapy using stem cell treatment, CRISPR-Cas promises improved efficacy. Patient treatment and lowering side effects significantly in individual genetic profiles will guide CRISPR-based treatments. These procedures will undoubtedly lead to therapies that are both efficient and curative of a wide range of genetic diseases, ushering in a new era of precision medicine. This chapter discusses about CRISPR Cas9 mechanism and its significance in the treatment of Hereditary disorders.
