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Related Concept Videos

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After...
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In Vivo Nanovector Delivery of a Heart-specific MicroRNA-sponge
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Functional Network Analysis Reveals Versatile MicroRNAs in Human Heart.

Yingqi Xu, Wenliang Zhu, Yong Sun

    Cellular Physiology and Biochemistry : International Journal of Experimental Cellular Physiology, Biochemistry, and Pharmacology
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    Researchers identified miR-7 as a key microRNA (miRNA) involved in heart conditions like myocardial infarction (MI) and heart failure (HF). This versatile miRNA plays a role in protein interactions and is overexpressed in these diseases.

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    Area of Science:

    • Molecular Biology
    • Cardiovascular Research
    • Genetics

    Background:

    • Single microRNAs (miRNAs) can regulate multiple cellular processes and disease phenotypes by targeting numerous messenger RNAs (mRNAs).
    • The existence and role of versatile miRNAs in the context of myocardial infarction (MI) and heart failure (HF) remain largely unexplored.

    Purpose of the Study:

    • To identify versatile miRNAs that are significantly dysregulated in myocardial infarction (MI) and heart failure (HF).
    • To investigate the role of identified versatile miRNAs in the pathological mechanisms of MI and HF in vivo.

    Main Methods:

    • Utilized hypergeometric analysis and network-based functional analyses on human protein interaction and miRNA-gene association data.
    • Established mouse models of MI and HF to validate the dysregulated expression and functional significance of candidate versatile miRNAs.

    Main Results:

    • The study successfully validated known miRNAs with established roles in MI and HF, confirming the method's effectiveness.
    • Innovatively identified miR-7 as a crucial miRNA involved in maintaining protein interaction balance, showing significant overexpression in MI and HF.
    • Further functional experiments are required to elucidate miR-7's specific impact on myocardial injury associated with MI and HF.

    Conclusions:

    • The findings highlight miR-7's pathological involvement in MI and HF, suggesting its potential as a therapeutic target.
    • These results have significant implications for developing miRNA-based therapeutic strategies for treating MI and HF.
    • Enhances the understanding of miRNA-mediated gene regulation within the human heart.