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Co-immunoprecipitation Assay Using Endogenous Nuclear Proteins from Cells Cultured Under Hypoxic Conditions
Published on: August 2, 2018
Emerging roles of miR-210 and other non-coding RNAs in the hypoxic response
1Department of Obstetrics, Gynecology and Reproductive Sciences, Magee-Womens Research Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA.
Abstract:
Hypoxia is a key component of the tumor microenvironment and represents a well-documented source of therapeutic failure in clinical oncology. Recent work has provided support for the idea that non-coding RNAs, and in particular, microRNAs, may play important roles in the adaptive response to low oxygen in tumors. Specifically, all published studies agree that the induction of microRNA-210 (miR-210) is a consistent feature of the hypoxic response in both normal and malignant cells. miR-210 is a robust target of hypoxia-inducible factors, and its overexpression has been detected in a variety of diseases with a hypoxic component, including most solid tumors. High levels of miR-210 have been linked to an in vivo hypoxic signature and to adverse prognosis in breast and pancreatic cancer patients. A wide variety of miR-210 targets have been identified, pointing to roles in mitochondrial metabolism, angiogenesis, DNA damage response, apoptosis, and cell survival. Such targets are suspected to affect the development of tumors in multiple ways; therefore, an increased knowledge about miR-210's functions may lead to novel diagnostic and therapeutic approaches in cancer.
Insights
MicroRNA-210 (miR-210) is consistently induced by hypoxia, a common feature in tumors. Its elevated levels correlate with poor prognosis and suggest novel therapeutic targets for cancer.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Hypoxia, or low oxygen, is a critical factor in the tumor microenvironment.
- Hypoxia often contributes to treatment failure in cancer therapy.
- Non-coding RNAs, particularly microRNAs, are increasingly recognized for their role in cellular responses to hypoxia.
Purpose of the Study:
- To explore the role of microRNA-210 (miR-210) in the adaptive response to tumor hypoxia.
- To investigate the clinical significance and functional targets of miR-210 in cancer.
Main Methods:
- Review of published studies on miR-210 and hypoxia.
- Analysis of miR-210 expression in various diseases and tumor types.
- Identification and functional annotation of known miR-210 targets.
Main Results:
- miR-210 is consistently upregulated in hypoxic normal and malignant cells.
- Overexpression of miR-210 is observed in solid tumors and linked to poor prognosis in breast and pancreatic cancers.
- Identified miR-210 targets implicate roles in mitochondrial metabolism, angiogenesis, DNA damage response, apoptosis, and cell survival.
Conclusions:
- miR-210 is a key mediator of the cellular response to hypoxia in tumors.
- Understanding miR-210's functions offers potential for developing new cancer diagnostics and therapeutics.
- miR-210 represents a promising target for overcoming therapeutic resistance in hypoxic tumors.
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