Fragile Histidine Triad (FHIT) Suppresses Proliferation and Promotes Apoptosis in Cholangiocarcinoma Cells by Blocking PI3K-Akt Pathway
Fragile histidine triad (FHIT) is a tumor suppressor protein that regulates cancer cell proliferation and apoptosis. However, its exact mechanism of action is poorly understood. Phosphatidylinositol 3-OH kinase (PI3K)-Akt-survivin is an important signaling pathway that was regulated by FHIT in lung...
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| Format: | Article |
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Wiley
2014-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/179698 |
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| author | Qiang Huang Zhen Liu Fang Xie Chenhai Liu Feng Shao Cheng-lin Zhu Sanyuan Hu |
| author_facet | Qiang Huang Zhen Liu Fang Xie Chenhai Liu Feng Shao Cheng-lin Zhu Sanyuan Hu |
| author_sort | Qiang Huang |
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| description | Fragile histidine triad (FHIT) is a tumor suppressor protein that regulates cancer cell proliferation and apoptosis. However, its exact mechanism of action is poorly understood. Phosphatidylinositol 3-OH kinase (PI3K)-Akt-survivin is an important signaling pathway that was regulated by FHIT in lung cancer cells. To determine whether FHIT can regulate this pathway in cholangiocarcinoma QBC939 cells, we constructed an FHIT expression plasmid and used it to transfect QBC939 cells. Protein and mRNA expression were measured by western blotting and qRT-PCR, respectively. The viability and apoptosis of QBC939 cells were then assessed using MTT assays and flow cytometry. Our results revealed that the expression of survivin and Bcl-2 was downregulated, and caspase 3 was upregulated, in cells overexpressing FHIT. In addition, FHIT suppressed the phosphorylation of Akt. The changes in cell proliferation and apoptosis were obvious in cells overexpressing FHIT which parallels that of treatment with LY294002, a potent inhibitor of phosphoinositide 3-kinases. Treatment with LY294002 further decreased the expression of survivin and Bcl-2 and increased caspase-3 levels. These results suggest that FHIT can block the PI3K-Akt-survivin pathway by suppressing the phosphorylation of Akt and the expression of survivin and Bcl-2 and upregulating caspase 3. |
| format | Article |
| id | doaj-art-c7e5226d5bee4adfbfc0a37d99d21d88 |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-c7e5226d5bee4adfbfc0a37d99d21d882025-02-03T06:00:25ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/179698179698Fragile Histidine Triad (FHIT) Suppresses Proliferation and Promotes Apoptosis in Cholangiocarcinoma Cells by Blocking PI3K-Akt PathwayQiang Huang0Zhen Liu1Fang Xie2Chenhai Liu3Feng Shao4Cheng-lin Zhu5Sanyuan Hu6Department of General Surgery, Qilu Hospital of Shandong University, No. 107 Wenhuaxi Road, Jinan 250012, ChinaDepartment of General Surgery, Anhui Provincial Hospital Affiliated with Anhui Medical University, Hefei, Anhui 230001, ChinaDepartment of General Surgery, Anhui Provincial Hospital Affiliated with Anhui Medical University, Hefei, Anhui 230001, ChinaDepartment of General Surgery, Anhui Provincial Hospital Affiliated with Anhui Medical University, Hefei, Anhui 230001, ChinaDepartment of General Surgery, Anhui Provincial Hospital Affiliated with Anhui Medical University, Hefei, Anhui 230001, ChinaDepartment of General Surgery, Anhui Provincial Hospital Affiliated with Anhui Medical University, Hefei, Anhui 230001, ChinaDepartment of General Surgery, Qilu Hospital of Shandong University, No. 107 Wenhuaxi Road, Jinan 250012, ChinaFragile histidine triad (FHIT) is a tumor suppressor protein that regulates cancer cell proliferation and apoptosis. However, its exact mechanism of action is poorly understood. Phosphatidylinositol 3-OH kinase (PI3K)-Akt-survivin is an important signaling pathway that was regulated by FHIT in lung cancer cells. To determine whether FHIT can regulate this pathway in cholangiocarcinoma QBC939 cells, we constructed an FHIT expression plasmid and used it to transfect QBC939 cells. Protein and mRNA expression were measured by western blotting and qRT-PCR, respectively. The viability and apoptosis of QBC939 cells were then assessed using MTT assays and flow cytometry. Our results revealed that the expression of survivin and Bcl-2 was downregulated, and caspase 3 was upregulated, in cells overexpressing FHIT. In addition, FHIT suppressed the phosphorylation of Akt. The changes in cell proliferation and apoptosis were obvious in cells overexpressing FHIT which parallels that of treatment with LY294002, a potent inhibitor of phosphoinositide 3-kinases. Treatment with LY294002 further decreased the expression of survivin and Bcl-2 and increased caspase-3 levels. These results suggest that FHIT can block the PI3K-Akt-survivin pathway by suppressing the phosphorylation of Akt and the expression of survivin and Bcl-2 and upregulating caspase 3.http://dx.doi.org/10.1155/2014/179698 |
| spellingShingle | Qiang Huang Zhen Liu Fang Xie Chenhai Liu Feng Shao Cheng-lin Zhu Sanyuan Hu Fragile Histidine Triad (FHIT) Suppresses Proliferation and Promotes Apoptosis in Cholangiocarcinoma Cells by Blocking PI3K-Akt Pathway The Scientific World Journal |
| title | Fragile Histidine Triad (FHIT) Suppresses Proliferation and Promotes Apoptosis in Cholangiocarcinoma Cells by Blocking PI3K-Akt Pathway |
| title_full | Fragile Histidine Triad (FHIT) Suppresses Proliferation and Promotes Apoptosis in Cholangiocarcinoma Cells by Blocking PI3K-Akt Pathway |
| title_fullStr | Fragile Histidine Triad (FHIT) Suppresses Proliferation and Promotes Apoptosis in Cholangiocarcinoma Cells by Blocking PI3K-Akt Pathway |
| title_full_unstemmed | Fragile Histidine Triad (FHIT) Suppresses Proliferation and Promotes Apoptosis in Cholangiocarcinoma Cells by Blocking PI3K-Akt Pathway |
| title_short | Fragile Histidine Triad (FHIT) Suppresses Proliferation and Promotes Apoptosis in Cholangiocarcinoma Cells by Blocking PI3K-Akt Pathway |
| title_sort | fragile histidine triad fhit suppresses proliferation and promotes apoptosis in cholangiocarcinoma cells by blocking pi3k akt pathway |
| url | http://dx.doi.org/10.1155/2014/179698 |
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