Abstract
Isatin is an indole-derived organic compound. It is a natural component of the Couroupita guianensis plant. It is also the metabolic derivative of the human body hormone adrenaline. Studies have shown the anti-tumoral effects of isatin derivatives. In this study, the cytotoxic effects of isatin on HepG2, a hepatocellular cancer cell line was investigated. Additionally, its cytotoxic and protective-proliferative effects on AML12, a healthy liver cell line was investigated. This evaluation was conducted using MTT, fluorescent staining, wound healing, and real-time polymerase chain reaction analyses. The IC50 values for 48 hours of isatin application were calculated as 186.23 µM for HepG2 and 7.05 mM for AML12. The analysis of wound healing and fluorescent staining at varying doses of HepG2 application revealed suppression of proliferation and triggered apoptosis in HepG2 cells. In contrast, AML12 cells exhibited promoted proliferation under similar conditions. Moreover, the observed upregulation of oxidative stress genes CuZn/Mn-SOD and mitochondrial apoptotic pathway genes Bax, cleaveled-Cas3, APAF1, and p53 in HepG2 cells contrasted with their decreased expression in AML12 cell lines. These results suggest the potential of natural isatin as a promising anti-cancer agent for liver cancer cell lines and as a protective supplement for healthy liver cells.
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