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Updated: Dec 1, 2025

In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice
Published on: August 23, 2019
Regulatory role of microRNAs on PTEN signaling
Soudeh Ghafouri-Fard1, Atefe Abak2, Hamed Shoorei3
1Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Abstract:
Phosphatase and tensin homolog (PTEN) gene encodes a tumor suppressor protein which is altered in several malignancies. This protein is a negative regulator of the PI3K/AKT signaling. Several transcription factors regulate the expression of PTEN in positive or negative directions. Moreover, numerous microRNAs (miRNAs) have functional interactions with PTEN and inhibit its expression. Suppression of PTEN can attenuate the response of cancer cells to chemotherapeutic agents. Based on the critical role of this tumor suppressor gene, the identification of negative regulators of its expression has practical significance particularly in the prevention and management of cancer. Meanwhile, the interaction between miRNAs and PTEN has functional consequences in non-malignant disorders including myocardial infarction, osteoporosis, cerebral ischemic stroke, and recurrent abortion. In the present review, we describe the role of miRNAs in the regulation of expression and activity of PTEN.
Insights
MicroRNAs (miRNAs) regulate the tumor suppressor Phosphatase and tensin homolog (PTEN) gene. Understanding these miRNA-PTEN interactions is crucial for cancer prevention and treatment, and managing other diseases.
Area of Science:
- Molecular Biology
- Oncology
- Genetics
Background:
- The Phosphatase and tensin homolog (PTEN) gene is a critical tumor suppressor.
- PTEN negatively regulates the PI3K/AKT signaling pathway, impacting cell growth and survival.
- Dysregulation of PTEN is implicated in various malignancies and non-malignant disorders.
Purpose of the Study:
- To review the regulatory roles of microRNAs (miRNAs) in PTEN expression and activity.
- To highlight the significance of understanding miRNA-PTEN interactions in cancer and other diseases.
Main Methods:
- Literature review of studies investigating miRNA-PTEN interactions.
- Analysis of the functional consequences of these interactions in different biological contexts.
Main Results:
- Numerous miRNAs have been identified to directly interact with and inhibit PTEN expression.
- Suppression of PTEN by miRNAs can affect cancer cell response to chemotherapy.
- miRNA-PTEN interactions are also relevant in non-malignant conditions like myocardial infarction and stroke.
Conclusions:
- miRNAs are significant regulators of PTEN, influencing both its expression and activity.
- Targeting miRNA-PTEN interactions may offer therapeutic strategies for cancer and other diseases.
- Further research into these interactions is essential for clinical applications.
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