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In Vivo Nanovector Delivery of a Heart-specific MicroRNA-sponge
Published on: June 15, 2018
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Circadian MicroRNAs in Cardioprotection
Yoshimasa Oyama1, Colleen Marie Bartman1, Jennifer Gile1
1Department of Anesthesiology, University of Colorado Denver School of Medicine, Aurora, CO 80045. United States.
Current Pharmaceutical Design
|July 13, 2017
Summary
The body's internal molecular clock regulates crucial functions and protects the heart. Disruptions to this clock, particularly circadian rhythm protein Period 2 (PER2), can harm heart health, but microRNAs like miR-21 show promise for protection.
Area of Science:
- Chronobiology and Cardiovascular Research
- Molecular Biology and Genetics
Background:
- Life on Earth is profoundly influenced by circadian rhythms, regulated by an internal molecular clock synchronized with light-dark cycles.
- A dysregulated molecular clock is implicated in metabolic diseases, with myocardial infarction onset showing circadian periodicity.
- Circadian rhythm protein Period 2 (PER2) provides endogenous cardioprotection against ischemia, suggesting therapeutic potential.
Purpose of the Study:
- To investigate circadian microRNA-based cardioprotective pathways.
- To identify microRNAs regulated by PER2 during myocardial ischemia.
- To explore novel therapeutic strategies for myocardial ischemia by targeting circadian mechanisms.
Main Methods:
- Evaluation of transcriptional changes in PER2-dependent microRNAs during myocardial ischemia.
- Analysis of microRNA expression profiles among 352 abundant microRNAs.
- Assessment of miR-21's role in mediating PER2-elicited cardioprotection.
Main Results:
- miR-21 was identified as a top PER2-dependent microRNA involved in cardioprotection.
- miR-21 was shown to mediate the cardioprotective effects of PER2.
- Circadian entrainment through intense light therapy emerged as a potential strategy to boost miR-21 activity.
Conclusions:
- Circadian microRNAs, particularly miR-21, play a significant role in cardioprotection.
- Targeting circadian pathways offers novel therapeutic avenues for myocardial ischemia.
- Further research into light therapy and miR-21 could lead to innovative treatments for heart conditions.
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