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Tabandeh, Fatemeh, Moradian Tehrani, Rana, Sharifi, Mohammadreza, Toopchi, Elmira. (1404). Investigating therapeutic efficacy of dacarbazine and temozolomide, alone and in combination with BRAF(V600E) siRNA in A375 human melanoma cell line. , 28(6), 772-783. doi: 10.22038/ijbms.2025.84187.18208
Fatemeh Tabandeh; Rana Moradian Tehrani; Mohammadreza Sharifi; Elmira Toopchi. "Investigating therapeutic efficacy of dacarbazine and temozolomide, alone and in combination with BRAF(V600E) siRNA in A375 human melanoma cell line". , 28, 6, 1404, 772-783. doi: 10.22038/ijbms.2025.84187.18208
Tabandeh, Fatemeh, Moradian Tehrani, Rana, Sharifi, Mohammadreza, Toopchi, Elmira. (1404). 'Investigating therapeutic efficacy of dacarbazine and temozolomide, alone and in combination with BRAF(V600E) siRNA in A375 human melanoma cell line', , 28(6), pp. 772-783. doi: 10.22038/ijbms.2025.84187.18208
Tabandeh, Fatemeh, Moradian Tehrani, Rana, Sharifi, Mohammadreza, Toopchi, Elmira. Investigating therapeutic efficacy of dacarbazine and temozolomide, alone and in combination with BRAF(V600E) siRNA in A375 human melanoma cell line. , 1404; 28(6): 772-783. doi: 10.22038/ijbms.2025.84187.18208

Investigating therapeutic efficacy of dacarbazine and temozolomide, alone and in combination with BRAF(V600E) siRNA in A375 human melanoma cell line

Iranian Journal of Basic Medical Sciences
مقاله 10، دوره 28، شماره 6، شهریور 2025، صفحه 772-783    اصل مقاله (765.71 K)
نوع مقاله: Original Article
شناسه دیجیتال (DOI): 10.22038/ijbms.2025.84187.18208
نویسندگان
Fatemeh Tabandeh1؛ Rana Moradian Tehrani* 2؛ Mohammadreza Sharifi2؛ Elmira Toopchi2
1Medical Biotechnology. Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
2Department of Genetics and Molecular Biology. School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
چکیده
Objective(s): Melanoma is one of the most aggressive and deadly skin cancers. Despite advances, effective melanoma treatment is challenging, often requiring a shift from individual therapies to combination approaches. This study explores whether combining dacarbazine (DTIC) and temozolomide (TMZ) with the siRNA approach holds promise for melanoma treatment.
Materials and Methods: To determine the IC50 values of DTIC and TMZ, the A375 cell line was treated with different drug concentrations for 24–72 hr. The best exposure time of BRAF siRNA transfection was performed. Subsequently, cell viability (using the MTT assay), apoptosis (by flow cytometry), and gene expression levels of B-Raf proto-oncogene, serine/threonine kinase (BRAF), caspase 3 (CASP3), and phosphoinositide-3-kinase regulatory subunit 3 (PIK3R3) genes (by quantitative real-time PCR) were assessed in the treated groups (i.e., control, negative controls, DTIC alone, TMZalone, DTIC+ TMZ, BRAF(V600E)siRNA alone, siRNA+ DTIC, siRNA+ TMZ, and siRNA+ DTIC+ TMZ groups). 
Results: Cell viability significantly decreased in the chemotherapy-only and siRNA+drug groups, although no difference was observed between them. The apoptosis percentage in all treated groups indicated a significant difference compared to the control group. The expression of the BRAF gene notably decreased in the BRAF (V600E) siRNA +drug groups compared to the chemotherapy groups. Despite overexpression of CASP3 in the chemotherapy-treated groups, the most effective enhancement was noted in the siRNA+DTIC+TMZ group (P<0.0001). The mean expression of the PIK3R3 gene in siRNA+chemotherapy groups revealed a notable reduction. 
Conclusion: These findings suggest that the siRNA-transfected treatment groups have the potential to provide therapeutic effects comparable to those of chemotherapy. 
کلیدواژه‌ها
Drug combinations؛ Dacarbazine؛ Temozolomide؛ Melanoma؛ RNA؛ Small Interfering؛ Proto-oncogene proteins - B-raf؛ Gene silencing؛ BRAF Inhibitors
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