Gene Therapy in Molecular Biology and Drug Delivery

The objective of gene therapy is to manipulate/modify the gene expression or modify living cell characteristics for therapeutic utilization. It aims to achieve therapeutic effects by either inserting novel genes, rectifying or substituting the genes that are abnormal, or modifying the pre-existing gene expression. The therapy shows potential in addressing a diverse array of genetic and acquired disorders. This includes certain types of cancer, hereditary genetic diseases like muscular dystrophy and cystic fibrosis, and other circumstances where genetic factors have a significant influence. Gene therapy can be accomplished by several mechanisms, namely, gene editing, gene replacement, gene addition, and gene silencing. Gene replacement involves the replacement of malfunctioning genes with the functional copy in the patient’s cells. Gene editing pertains to technologies like CRISPR-Cas9 to edit the specific gene in the patient’s cells. In a genetic condition caused by a missing gene, the gene addition procedure can add a functioning copy of that gene to the patient’s cells to compensate for the deficiencies. In genetic disorders resulting from the overexpression of genes, gene silencing can be applied to reduce the expression or downregulation of these genes by techniques such as RNA interference (RNAi). Gene therapy holds promising possibilities and represents an innovative approach to drug delivery. It has the capacity to eliminate the necessity for frequent injections of proteins or medications, thereby alleviating the challenges associated with adhering to external drug schedules.