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Published on: September 15, 2023
The Role of PI3K/Akt/mTOR Signaling in Gastric Carcinoma
Tasuku Matsuoka1, Masakazu Yashiro2
1Department of Surgical Oncology, Osaka City University Graduate School of Medicine, 1-4-3 Asahi-machi, Abeno-ku, Osaka 545-8585, Japan. m4808279@med.osaka-cu.ac.jp.
Abstract:
The phosphatidylinositol 3-kinase (PI3K)/Akt/mammalian target of rapamycin (mTOR) pathway is one of the key signaling pathways induced by various receptor-tyrosine kinases. Accumulating evidence shows that this pathway is an important promoter of cell growth, metabolism, survival, metastasis, and resistance to chemotherapy. Genetic alterations in the PI3K/Akt/mTOR pathway in gastric carcinoma have often been demonstrated. Many kinds of molecular targeting therapies are currently undergoing clinical testing in patients with solid tumors. However, with the exception of the ErbB2-targeting antibody, targeting agents, including PI3K/Akt/mTOR inhibitors, have not been approved for treatment of patients with gastric carcinoma. This review summarizes the current knowledge on PI3K/Akt/mTOR signaling in the pathogenesis of gastric carcinoma and the possible therapeutic targets for gastric carcinoma. Improved knowledge of the PI3K/Akt/mTOR pathway in gastric carcinoma will be useful in understanding the mechanisms of tumor development and for identifying ideal targets of anticancer therapy for gastric carcinoma.
Insights
The phosphatidylinositol 3-kinase (PI3K)/Akt/mammalian target of rapamycin (mTOR) pathway drives gastric carcinoma growth and metastasis. Understanding this pathway is crucial for developing new targeted therapies for gastric cancer.
Area of Science:
- Oncology
- Molecular Biology
- Cell Signaling
Background:
- The phosphatidylinositol 3-kinase (PI3K)/Akt/mammalian target of rapamycin (mTOR) pathway is frequently altered in gastric carcinoma.
- This pathway regulates critical cellular processes including growth, metabolism, survival, and metastasis.
Purpose of the Study:
- To review current knowledge on the role of the PI3K/Akt/mTOR pathway in gastric carcinoma pathogenesis.
- To identify potential therapeutic targets within this pathway for gastric cancer treatment.
Main Methods:
- Literature review of studies on PI3K/Akt/mTOR signaling in gastric carcinoma.
- Analysis of genetic alterations and therapeutic strategies targeting this pathway.
Main Results:
- The PI3K/Akt/mTOR pathway is a significant promoter of gastric cancer progression and chemoresistance.
- Despite its importance, PI3K/Akt/mTOR inhibitors are not yet approved for gastric carcinoma treatment, except for ErbB2-targeting agents.
Conclusions:
- Further understanding of PI3K/Akt/mTOR signaling in gastric carcinoma is essential for elucidating tumor development mechanisms.
- Identifying optimal therapeutic targets within this pathway holds promise for future gastric cancer therapies.
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