Zong XS, Feng YG, Wang X, Xing GH, Wu MY, Zhu Y. Effects of Tan II A on the proliferation, apoptosis and expression of HIF-1α of human gastric cancer cell line SGC7901 under hypoxia.
Shijie Huaren Xiaohua Zazhi 2009;
17:642-646. [DOI:
10.11569/wcjd.v17.i7.642]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To study the effects of Tan II A on the proliferation, apoptosis and expression of HIF-1α of human gastric cancer cell line SGC7901 under hypoxia.
METHODS: The model of hypoxia was established by CoCl2. There were four groups: normal control group, hypoxia control group, and hypoxia combined with different concentrations of Tan II A group. After Tan II A was added to the media with 0.5, 1.0, 2.0, 5.0 and 10.0 mg/L, respectively for 24, 48 and 72 h during hypoxia, and the cells' proliferative vitality was detected by MTT. After Tan II A was added to the media with 0.5, 1.0, 2.0, 5.0 and 10.0 mg/L respectively for 48 and 72 h during hypoxia, the apoptosis of SGC7901 human gastric cancer cells was detected by HOECHST staining . After Tan ⅡA was added to the media with 0.5, 2.0 and 10.0 mg/L respectively for 48 h during hypoxia, the expression of HIF-1α protein was detected by immunocytochemical staining.
RESULTS: MTT confirmed that the proliferation of SGC7901 cancer cells was obviously inhibited by Tan II A (P < 0.01) in a dose- and time-dependent manner under hypoxia, and the inhibition rate reached 71.2% after treatment with 10 mg/L Tan II A for 72 h. HOECHST staining found Tan II A induced apoptosis of gastric cancer cells in a dose- and time-dependent manner after treatment with 0.5-10.0 mg/L Tan II A for 48 h and 72 h respectively under hypoxia (F = 60354.00, 187922.10, both P < 0.05), and the apoptosis rate reached 40.70% ± 1.55% after treatment with 10.0 mg/L Tan II A for 72 h. Immunocytochemical staining revealed that the expression of HIF-1α protein was inhibited by Tan II A in a dose-dependent manner under hypoxia (F = 712.326, P < 0.01).
CONCLUSION: Tan II A inhibits the proliferation of SGC7901 human gastric cancer cells and induces the apoptosis of them under hypoxia, which may be related to the down regulation of HIF-1α protien expression by Tan II A.
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