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Current Therapeutic Strategies of Xeroderma Pigmentosum

Xeroderma pigmentosum (XP) is an autosomal recessive genetic disease caused by a defect in the DNA repair system, exhibiting skin cancer on sun exposure. As it is an incurable disease, therapeutic strategies of this disease are critical. This review article takes an attempt to explore the current therapeutic advancements in XP. Different approaches including sun avoidance; surgical removal of cancerous lesions; laser and photodynamic therapy; use of retinoid, 5-fluorouracil, imiquimod, photolyase, and antioxidant; interferon therapy and gene therapy are chosen by doctors and patients to lessen the adverse effects of this disease. Among these options, sun avoidance, use of 5-fluorouracil and imiquimod, and interferon therapy are effective. However, some approaches including laser and photodynamic therapy, and the use of retinoids are effective against skin cancer having severe side effects. Furthermore, surgical removal of cancerous lesions and use of antioxidants are considered to be effective against this disease; however, efficacies of these are not experimentally determined. In addition, some approaches including oral vismodegib, immunotherapy, nicotinamide, acetohexamide, glimepiride-restricted diet are found to be effective to minimize the complications secondary to defects in the nucleotide excision repair (NER) system and also enhance the NER, which are under experimental level yet. Besides these, gene therapy, including the introduction of missing genes and genome edition, may be a promising approach to combat this disease, which is also not well established now. In the near future, these approaches may be effective tools to manage XP.