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Comparison of diarsenic oxide and tetraarsenic oxide on anticancer effects: relation to the apoptosis molecular
Hong-Seok Chang1, Su-Mi Bae, Yong-Wan Kim
1Department of Therapeutic Radiology, College of Medicine, The Catholic University of Korea, Seoul, Korea.
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.
Insights
A novel arsenic compound, As4O6, demonstrates superior efficacy in inhibiting human cervical cancer cell growth compared to As2O3. As4O6 induces apoptosis and cell cycle arrest, suggesting potent anti-tumor potential.
Area of Science:
- Oncology
- Pharmacology
- Cell Biology
Background:
- Arsenic trioxide (As2O3) is known to induce apoptosis and inhibit proliferation in various human cancer cells.
- Cervical cancer remains a significant global health concern, necessitating novel therapeutic strategies.
Purpose of the Study:
- To evaluate the anti-cancer potential of a novel arsenic compound, As4O6, in comparison to As2O3.
- To investigate the mechanisms of cell death induced by As4O6 and As2O3 in human cervical cancer cells.
Main Methods:
- In vitro and in vivo studies using HPV 16-positive SiHa cervical cancer cells.
- Flow cytometry and Western blotting to assess apoptosis and protein expression.
- Ingenuity Pathway Analysis (IPA) to explore differential cell death pathways.
Main Results:
- As4O6 exhibited greater efficacy in suppressing SiHa cell growth both in vitro and in vivo compared to As2O3.
- As4O6 induced cell cycle arrest at the sub-G1 phase.
- As4O6 significantly suppressed proliferating cell nuclear antigen (PCNA) and Bcl-XL, while upregulating p21 and Bax.
Conclusions:
- As4O6 possesses a distinct cell death pathway compared to As2O3.
- As4O6 demonstrates more potent anti-tumor effects against human cervical cancer cells.
- As4O6 represents a promising therapeutic candidate for cervical cancer treatment.
