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Tamoto A, Yashima K, Hosoda K, Yamamoto S, Kawata S, Ikebuchi Y, Matsumoto K, Kawaguchi K, Harada K, Murawaki Y, Isomoto H. Protein expression of Fragile Histidine Triad and cyclooxgenase-2 in serrated neoplasia of the colorectum. Oncol Lett 2017; 14:3683-3688. [PMID: 28927131 PMCID: PMC5587971 DOI: 10.3892/ol.2017.6634] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 03/09/2017] [Indexed: 12/20/2022] Open
Abstract
The adenoma-carcinoma sequence (ACS) and the serrated pathway are two distinct developmental routes leading to the formation of colorectal carcinoma (CRC). However, the mechanism triggered by the serrated pathway remains unclear. Therefore, to clarify the molecular and clinicopathological characteristics of the serrated tumorigenic pathway, immunohistochemistry was used to examine the expression of Fragile Histidine Triad (FHIT), cyclooxygenase-2 (COX-2), MutL homolog 1 (MLH1), MutS protein homolog 2 (MSH2) and P53 in endoscopically resected samples of 62 serrated polyps. These samples included 20 hyperplastic polyps (HPs), 16 traditional serrated adenomas (TSAs), 26 sessile serrated adenoma/polyps (SSA/Ps), 20 non-serrated adenomas, 20 carcinoma in adenomas (CIAs) and 18 early pure CRCs without any adenoma component (EPCs). FHIT expression was markedly reduced or absent in 50% of TSA samples, 92.3% of SSA/Ps and 44% of EPCs, but only rarely in HPs, non-serrated adenomas and CIAs. COX-2 expression was more common in non-serrated adenomas compared with in serrated polyps, and was present in 25 and 3.2% of the cases respectively (P<0.01). Furthermore, COX-2 expression was more frequent in CIAs (60%) compared with in EPCs (22.2%; P<0.05). The incidence of negative COX-2 expression was higher in FHIT-negative SSA/Ps compared with in FHIT-positive SSA/Ps (P=0.08). A total of 16.7% of EPC samples and 11.5% of SSA/Ps demonstrated a loss of MLH1/MSH2 expression, but none of the other tumor types did. P53 overexpression was significantly increased in EPC (77.8%) and CIA (60%) samples compared with in HP (0%), TSA (6.6%), SSA/P (0%) and non-serrated adenoma (10%) samples (P<0.01). These findings demonstrated that there are different expression patterns between the serrated pathway and ACS, indicating that aberrant FHIT and inhibited COX-2 expression may be associated with serrated tumorigenesis. In addition, this data indicated that EPC may contain tumors derived from the serrated pathway as well as ACS.
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Affiliation(s)
- Akihiro Tamoto
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Kazuo Yashima
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Kohei Hosoda
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Sohei Yamamoto
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Soichiro Kawata
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Yuichiro Ikebuchi
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Kazuya Matsumoto
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Koichiro Kawaguchi
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Kenichi Harada
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Yoshikazu Murawaki
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Hajime Isomoto
- Division of Medicine and Clinical Science, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
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Abd El-Azeem MA, Shams El-Deen AA, El-Tatawy FA, Haebah NA. Fragile histidine triad protein expression in colorectal adenoma and carcinoma. EGYPTIAN JOURNAL OF PATHOLOGY 2017; 37:91-103. [DOI: 10.1097/01.xej.0000516303.19166.0f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Fragile histidine triad (FHIT) suppresses proliferation and promotes apoptosis in cholangiocarcinoma cells by blocking PI3K-Akt pathway. ScientificWorldJournal 2014; 2014:179698. [PMID: 24757411 PMCID: PMC3976809 DOI: 10.1155/2014/179698] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Accepted: 02/17/2014] [Indexed: 01/09/2023] Open
Abstract
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.
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