Navigation Links
Regulatory molecule for tumor formation or suppression identified by Singapore, US researchers
Date:3/17/2009

One of the small regulatory molecules, named microRNA-125b, is a novel regulator of p53, an important protein that safeguards cells against cancers, Singapore and U.S. scientists report in the March 17, 2009 issue of the journal Genes & Development.

The scientists found that during embryonic development, this microRNA keeps the level of p53 low to avoid excessive cell death.

But, if the DNA is damaged, the microRNA level is reduced to allow an increase in p53, which eliminates damaged cells and thus prevents tumor formation.

The research was conducted with zebrafish.

"Interestingly, this microRNA is elevated in many types of human cancers, suggesting that it may contribute to the formation of tumours by suppressing the p53 protein," said Bing Lim, M.D., Ph.D., lead author and senior group leader at the Genome Institute of Singapore (GIS), a research institute under the Agency for Science, Technology and Research (A*STAR).

"Hence, our findings have important implications in the diagnosis and treatment of cancers," he added. "The significance of this finding, of course, once again emphasizes the relevance and importance of research linking microRNAs to many subspecialties of human medicine, including cancer and regenerative medicine."

Harvard Medical School's Judy Lieberman, M.D., Ph.D., said, "This important study provides an elegant and beautifully worked out example of the role of microRNAs in master-minding how a cell responds to environmental cues and developmental signals.

"The implication of this study is that these small molecules might be mimicked or antagonized as drugs to treat serious diseases for which no effective treatment exists at present," added Dr. Lieberman, senior investigator at the Immune Disease Institute, and Professor of Pediatrics and Director of the Division of AIDS at Harvard. She is not a co-author of the paper.

Professor of Cell Biology at the Harvard Medical School, Frank McKeon, Ph.D., commented, "This is an elegant use of zebrafish models to uncover how a single microRNA can regulate the p53 tumor suppressor gene. The strength of this regulation suggests that we will hear more about the microRNA-125b in specific human cancers in the near future." Dr. McKeon also is not a co-author of the paper

MicroRNA-125b is a member of the microRNA family of small regulatory molecules that have evolved in nature to regulate tightly the quantity of protein produced by each messenger RNA (mRNA), which generates the group of proteins that determine the unique characteristics of every cell type.

MicroRNAs play complex roles in the simultaneous fine-tuning of many genes in each cell a role not yet well understood by biologists. It is a complicated, delicate balance that can be profoundly disturbed if just a few microRNAs go awry.

Recent research reveals that microRNAs are abundant in the cell, and that they play important roles in development and in many diseases.


'/>"/>

Contact: Cathy Yarbrough
sciencematter@yahoo.com
858-243-1814
Agency for Science, Technology and Research (A*STAR), Singapore
Source:Eurekalert

Related biology news :

1. Type 1 diabetes triggered by lazy regulatory T-cells: McGill researchers
2. Use of nanomaterials in food packaging poses regulatory challenges
3. New regulatory mechanism discovered for cell identify and behavior in forming organs
4. Caltech researchers help unlock the secrets of gene regulatory networks
5. New data suggest jumping genes play a significant role in gene regulatory networks
6. Food counterfeiting, contamination outpace international regulatory systems
7. Memory molecule stores memories in neocortex
8. Clemson scientists shed light on molecules in living cells
9. Model for the assembly of advanced, single-molecule-based electronic components developed at Pitt
10. Botched production of insulin molecule may lead to diabetes
11. New molecules discovered that block cancer cells from modifying cell DNA
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/22/2016)... On Monday, the Department of Homeland Security (DHS) issued ... the Biometric Exit Program. The Request for Information (RFI), ... that CBP intends to add biometrics to confirm when ... , in order to deter visa overstays, to ... Logo - http://photos.prnewswire.com/prnh/20160622/382209LOGO ...
(Date:6/15/2016)... , June 15, 2016 ... market report titled "Gesture Recognition Market by Application Market - Global ... 2016 - 2024". According to the report, the  global ... billion in 2015 and is estimated to grow ... 48.56 billion by 2024.  Increasing application ...
(Date:6/3/2016)... 3, 2016 Das ... Nepal hat ein 44 ... geprägter Kennzeichen, einschließlich Personalisierung, Registrierung und IT-Infrastruktur, ... Produktion und Implementierung von Identitätsmanagementlösungen. Zahlreiche renommierte ... Januar teilgenommen, aber Decatur wurde als konformste ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... Parallel 6 , ... announced today the Clinical Reach Virtual Patient Encounter CONSULT module which enables ... the physician and clinical trial team. , Using the CONSULT module, patients and physicians ...
(Date:6/27/2016)...   Ginkgo Bioworks , a leading organism ... today awarded as one of the World Economic ... most innovative companies. Ginkgo Bioworks is engineering biology ... world in the nutrition, health and consumer goods ... customers including Fortune 500 companies to design microbes ...
(Date:6/24/2016)... ... June 24, 2016 , ... Researchers at the Universita ... miRNAs in people with peritoneal or pleural mesothelioma. Their findings are the subject of ... now. , Diagnostic biomarkers are signposts in the blood, lung fluid or tissue ...
(Date:6/23/2016)... 2016 /PRNewswire/ - FACIT has announced the creation ... biotechnology company, Propellon Therapeutics Inc. ("Propellon" or "the ... a portfolio of first-in-class WDR5 inhibitors for the ... WDR5 represent an exciting class of therapies, possessing ... for cancer patients. Substantial advances have been achieved ...
Breaking Biology Technology: