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AGXT2L1 is downregulated in carcinomas of the digestive system
Yunchao Deng1,2, Lu Wu1,2, Qianshan Ding1,2
1Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China.
Abstract:
Alanine-glyoxylate aminotransferase 2-like 1 (AGXT2L1) is a modulator of phospholipid metabolism, and its role in tumor biology is obscure. Previously, significant downregulation of AGXT2L1 has been observed in hepatocellular carcinoma. The aim of the present study was to investigate AGXT2L1 expression and its association with the clinical characteristics of common carcinomas of the digestive system. In the present study, the expression levels of AGXT2L1 were detected by immunohistochemical staining in colorectal cancer (CRC), gastric cancer and pancreatic cancer tissues. The associations between AGXT2L1 expression and clinicopathological features were analyzed using public gene expression datasets. Small interfering RNA was transfected into SW480 and HCT116 cells to explore the role of AGXT2L1 in CRC cells. AGXT2L1 expression was significantly decreased in cancerous tissues compared with in normal tissues, and low AGXT2L1 expression was associated with an unfavorable prognosis in patients. Furthermore, it was revealed that AGXT2L1 may regulate phosphatidylinositol and phosphatidylserine metabolism in cancerous tissues, and that decreased AGXT2L1 expression could induce autophagy in CRC cells. Overall, the present study provides a basis for further understanding of the role of AGXT2L1 and its association with autophagy in cancer.
Insights
Alanine-glyoxylate aminotransferase 2-like 1 (AGXT2L1) is downregulated in digestive system cancers, impacting prognosis. Reduced AGXT2L1 expression may promote autophagy in colorectal cancer cells.
Area of Science:
- Biochemistry
- Oncology
- Molecular Biology
Background:
- Alanine-glyoxylate aminotransferase 2-like 1 (AGXT2L1) is implicated in phospholipid metabolism, with its tumor biology role being unclear.
- Previous studies noted AGXT2L1 downregulation in hepatocellular carcinoma, suggesting a potential role in cancer.
Purpose of the Study:
- To investigate AGXT2L1 expression in common digestive system carcinomas (colorectal, gastric, pancreatic).
- To analyze the association between AGXT2L1 expression and clinicopathological features.
- To explore the functional role of AGXT2L1 in colorectal cancer (CRC) cells.
Main Methods:
- Immunohistochemical staining of AGXT2L1 in tumor and normal tissues.
- Analysis of public gene expression datasets for AGXT2L1 expression and clinical data correlation.
- Small interfering RNA (siRNA) mediated knockdown of AGXT2L1 in CRC cell lines (SW480, HCT116).
Main Results:
- AGXT2L1 expression was significantly decreased in colorectal, gastric, and pancreatic cancerous tissues compared to normal tissues.
- Low AGXT2L1 expression correlated with unfavorable prognosis in patients.
- AGXT2L1 knockdown induced autophagy in CRC cells and may regulate phosphatidylinositol and phosphatidylserine metabolism.
Conclusions:
- AGXT2L1 is downregulated in digestive system carcinomas, serving as a potential prognostic biomarker.
- AGXT2L1 plays a role in regulating phospholipid metabolism and autophagy in cancer.
- Further research into AGXT2L1's function in cancer biology is warranted.
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