alexa Role of MicroRNA Molecules in Colon Cancer Etiology | OMICS International | Abstract
ISSN: 0974-8369

Biology and Medicine
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Review Article

Role of MicroRNA Molecules in Colon Cancer Etiology

Farid E Ahmed*

GEM Tox Labs, Institute for research in Biotechnology, 2607 Calvin Way, Greenville, NC 27834, USA

Corresponding Author:
Farid E. Ahmed, PhD
Director, GEM Tox Labs Institute for Research in Biotechnology
2607 Calvin Way, Greenville, NC 27834, USA
Tel: +1 2523217261
Fax: +1 2527561656
E-mail: [email protected]

Received Date: March 10, 2014; Accepted Date: April 21, 2014; Published Date: April 29, 2014

Citation: Ahmed FE (2014) Role of MicroRNA Molecules in Colon Cancer Etiology. Biol Med 6:201. doi:10.4172/0974-8369.1000201

Copyright: © 2014 Ahmed FE. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

The biogenesis of micro (mi) RNA suggests that nearly 3% of human genes are encoded for micro (mi) RNAs, and computer predictions indicate that more than 30% of protein coding genes in humans are coded by miRNAs through an imperfect binding to the 3’ untranslated region (UTR) of target messenger (m) RNA affecting gene silencing and leading to either transcription repression, or induction of messenger (m) RNA degradation. The expression of several miRNAs in noninvasive body fluids/excrements has been linked to development of colorectal cancer (CRC) and its progression. The majority of miRNA genes are oriented antisense to neighboring genes, and miRNA genes are transcribed by polymerases II and III. The rate of evolution of miRNAs has been very slow, which has permitted morphological innovation by making gene expression specific, a process that permitted the genesis of complex organisms. Bacteria lack true miRNAs. Bioinformatics approaches to predict putative miRNA target genes has been facilitated by finding that miRNA target recognition is partly based on simple sequence complementarity, and exact base pairing between miRNAs and their targets is required only in the first six to eight bases from the 5′ end of the miRNA.

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