AI Article Synopsis
- As4O6 shows stronger anti-cancer effects than As2O3 by inducing more apoptosis and inhibiting the growth of HPV 16-positive SiHa cervical cancer cells.
- Flow cytometry and Western blotting techniques were used to analyze the effects of both arsenic compounds on cell death and the regulation of key proteins involved in apoptosis and cell proliferation.
- Ingenuity Pathway Analysis revealed that As4O6 triggers a distinct cell death pathway compared to As2O3, particularly arresting the cell cycle and altering the expression of several apoptosis-related proteins.
Article Abstract
As2O3 has been reported to induce apoptosis and inhibit the proliferation of various human cancer cells. We evaluated the ability of a novel arsenic compound, As4O6, along with As2O3 in vitro and in vivo. To examine the levels of apoptosis of HPV 16-positive SiHa cervical cancer cell, flow cytometry and Western blotting were employed at various time intervals after two arsenic compound treatments. Ingenuity Pathway Analysis (IPA) was applied to investigate the differential cell death pathway of As4O6 and As2O3. The results showed that As4O6 was more effective in suppressing SiHa cell growth in vitro and in vivo compared to As2O3. In addition, the cell cycle was arrested at the sub-G1 phase by As4O6. Western blot analysis showed that the proliferating cell nuclear antigen (PCNA) and Bcl-XL with sequence homology to Bcl-2 were significantly suppressed by As4O6. However, the apoptosis-related proteins such as p21 and Bax were overexpressed by As4O6. IPA suggested that there is a significant difference between As2O3- and As4O6-induced cell death pathways. Taken together, As4O6 has a specific cell death pathway and possesses more potent anti-tumor effects on human cervical cancer cells in vitro and in vivo.
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