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Published on: April 6, 2012
Regulation of microRNA-1 (miR-1) expression in human cancer
Chao Han1, Jacson K Shen2, Francis J Hornicek2
1Department of Pharmacy, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, PR China; Sarcoma Biology Laboratory, Center for Sarcoma and Connective Tissue Oncology, Massachusetts General Hospital, Boston, MA, USA.
Abstract:
MicroRNAs (miRs) have been found to play important roles in tumorigenesis, apoptosis, metastasis, and drug resistance in cancer. Among a number of miRs, miR-1 was shown to be predominantly downregulated in almost all examined human cancers. As a tumor suppressor miR involved in post-transcriptional regulation of crucial tumor associated gene expression, miR-1 represents a promising target for anticancer therapy. Re-expression of miR-1 can suppress cancer cell proliferation, promote apoptosis, and reverse drug resistance in cancers both in vitro and in vivo. Recently, the regulatory mechanisms of miR-1 expression have been studied in various cancers in different model systems. In this review, we summarize the mechanisms of miR-1 expression through epigenetic, transcriptional, and post-transcriptional regulation. These regulatory mechanisms of miR-1 expression could help us to understand the functions of altered miR-1 expression and provide valuable insights for further investigations into miR-1 based cancer therapy.
Insights
MicroRNA-1 (miR-1) is frequently downregulated in cancers and acts as a tumor suppressor. Restoring miR-1 levels shows potential for effective anticancer therapies by inhibiting cancer growth and reversing drug resistance.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- MicroRNAs (miRs) regulate critical cancer processes like tumorigenesis and drug resistance.
- miR-1 is notably downregulated across many human cancers, suggesting a tumor suppressor role.
- Altered miR-1 expression impacts cancer progression and therapeutic responses.
Purpose of the Study:
- To review the regulatory mechanisms governing miR-1 expression in various cancers.
- To elucidate how epigenetic, transcriptional, and post-transcriptional factors influence miR-1 levels.
- To provide insights for developing miR-1-based cancer therapies.
Main Methods:
- Literature review of studies on miR-1 regulation in cancer.
- Analysis of epigenetic modifications affecting miR-1.
- Examination of transcriptional and post-transcriptional control of miR-1.
Main Results:
- miR-1 functions as a tumor suppressor by regulating key genes involved in cancer.
- Re-expression of miR-1 demonstrates efficacy in suppressing cancer proliferation and apoptosis in vitro and in vivo.
- Understanding miR-1 regulation is crucial for its therapeutic application.
Conclusions:
- miR-1 is a promising therapeutic target for cancer treatment.
- Epigenetic, transcriptional, and post-transcriptional mechanisms control miR-1 expression.
- Further research into miR-1 regulation will advance miR-1 based cancer therapy.
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