Review Article | Volume: 5, Issue: 2, March-April, 2017

Recent developments in understanding the mechanism and functions of microRNAs

Suhail Muzaffar Karishma Bisht   

Open Access   

Published:  Mar 20, 2017

DOI: 10.7324/JABB.2017.50201
Abstract

Based on their mechanism of action and biological function, several classes of small RNAs have come into the limelight in the last two decades. These small RNA molecules generally belong to three main categories: short interfering RNAs (siRNAs), microRNAs (miRNAs), and piwi-interacting RNAs (piRNAs). miRNAs and siRNAs are distinguished primarily because miRNAs are endogenous in nature and are expressed by an organism's own genome, whereas siRNAs are exogenous in origin and derived mainly from the viruses and transposons. The first miRNA, lin-4, was discovered in 1993 as an endogenous regulator of genes that control developmental timing in Caenorhabditis elegans. miRNAs are coded by both plant and animal genomes and their transcription is typically performed by RNA polymerase II. MicroRNAs repress the expression of many genes by accelerating messenger RNA degradation as well as translational inhibition, thereby reducing the level of protein. Due to their involvement in various diseases like cancer, miRNAs have been a focus of scientific research for their potential as a new generation of drugs. The recent findings in miRNA research have been summarized in this review to add new dimensions to miRNA mechanism and functions.


Keyword:     MicroRNA MicroRNA biogenesis Functions of microRNAs.


Citation:

Muzaffar S, Bisht K. Recent developments in understanding the mechanism and functions of microRNAs. J App Biol Biotech. 2017; 5 (02): 001-007. DOI: 10.7324/JABB.2017.50201

Copyright: Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike license.

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