CRISPR Technologies in Biotechnology: Mechanisms, Applications, Advantages, Risks, and Future Prospects

CRISPR technology is an innovative technique in the field of genetic engineering. It facilitates the precise modification of DNA. The defence mechanism of bacteria against viruses served as the model for CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats). Jennifer Doudna and Emmanuelle Charpentier were awarded the 2020 Nobel Prize in Chemistry for the development of the CRISPR-Cas9 system in 2012. The method cuts and modifies DNA using guide RNA and the Cas9 enzyme. The Cas9 enzyme slices the target site on DNA after the guide RNA (gRNA) finds it. Genetic engineers can introduce the desired modification (deletion, insertion, or substitution) as the cell attempts to repair this incision. This procedure is quick, inexpensive, and very accurate. CRISPR has several uses, including the treatment of genetic disorders like sickle cell anaemia, cancer immunotherapy, the prevention of viruses like HIV, the development of resilient crop types in agriculture, and the manufacture of new species in biotechnology. CRISPR is more effective and simpler than previous methods (ZFN, TALEN); however, it encounters challenges such as off-target effects (unintended incisions) and ethical issues (editing human embryos).