Navigation Links
A common thread links multiple human cognitive disorders
Date:2/15/2010

A new study reveals that a common underlying mechanism is shared by a group of previously unrelated disorders which all cause complex defects in brain development and function. Rett syndrome (RTT), Cornelia de Lange syndrome (CdLS) and Alpha-Thalassemia mental Retardation, X-linked syndrome (ATR-X) have each been linked with distinct abnormalities in chromatin, the spools of proteins and DNA that make up chromosomes and control how genetic information is read in a cell. Now, research, published by Cell Press in the February 16th issue of the journal Developmental Cell, helps to explain why these different chromatin abnormalities all interfere with proper gene expression patterns necessary for normal development and mature brain function.

"Although clearly distinct from one another, human developmental disorders that are linked with chromatin dysfunction often share similar cognitive clinical features," explains senior study author, Dr. Nathalie Brub from the University of Western Ontario. "Whether the overlapping cognitive symptoms are due to underlying interlinked molecular mechanisms is still poorly understood." Her work now demonstrates that chromatin proteins defective in RTT, CdLS, and ATR-X syndromes are all associated with each other and are required for one another's function at certain "imprinted genes" in the developing mouse brain. Imprinted genes are a relatively rare type of gene that carries different information depending on whether it is inherited from the mother or the father. The results support the conclusion that ATRX (the chromatin protein that is defective in ATR-X syndrome) and its binding partners regulate expression of imprinted genes, and likely other genes required for normal brain development, by controlling chromatin structure.

"Our findings provide the first glimpse of the cooperation between ATRX and multiple other disease proteins in the regulation of common gene targets, perhaps explaining similarities between the associated human syndromes," says Dr. Brub. "The failure to properly suppress genes that are essential during embryonic development, but potentially detrimental in the mature brain, might contribute to cognitive deficiencies characteristic of RTT, CdLS and ATR-X syndromes. Further studies are needed to gain a better understanding of the specific role of these chromatin proteins and the molecular pathogenesis of the associated human disorders."


'/>"/>

Contact: Cathleen Genova
cgenova@cell.com
617-397-2802
Cell Press
Source:Eurekalert

Related biology news :

1. Cell of origin identified for common type of breast cancer
2. The how and why of freezing the common fruit fly
3. Killer catfish? Venomous species surprisingly common, study finds
4. Researchers establish common seasonal pattern among bacterial communities in Arctic rivers
5. Factors from common human bacteria may trigger multiple sclerosis
6. Nanoparticles used in common household items caused genetic damage in mice
7. Testicular tumors may explain why some diseases are more common in children of older fathers
8. Boys with urogenital birth defects are 33 percent more common in villages sprayed with DDT
9. Scientists identify common HPV genotypes in northern India, encourage vaccination
10. Common herbicides and fibrates block nutrient-sensing receptor found in gut and pancreas
11. Oxidized form of a common vitamin may bring relief for ulcerative colitis
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2017)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the "Company"), ... Report on Form 10-K on Thursday April 13, 2017 with the ... The ... section of the Company,s website at http://www.nxt-id.com  under "SEC Filings," ... 2016 Year Highlights: Acquisition of ...
(Date:4/11/2017)... Research and Markets has announced the addition ... their offering. ... tracking market to grow at a CAGR of 30.37% during the ... 2017-2021, has been prepared based on an in-depth market analysis with ... its growth prospects over the coming years. The report also includes ...
(Date:4/5/2017)... -- The Allen Institute for Cell Science today announces the ... and dynamic digital window into the human cell. The ... of deep learning to create predictive models of cell ... growing suite of powerful tools. The Allen Cell Explorer ... available resources created and shared by the Allen Institute ...
Breaking Biology News(10 mins):
(Date:7/26/2017)... ... July 26, 2017 , ... Vincent R. Burton, MBBS, FRCA, ... licensed by the Bahamas’ National Stem Cell Ethics Committee (NSCEC). , Dr. Burton ... the West Indies. He went on to complete residency training in the United Kingdom ...
(Date:7/26/2017)... ... July 25, 2017 , ... Avery Products ... that enable short-run digital printing, is proud to announce that it has won ... Wizard online software available at avery.com/GHS . The products were recently honored ...
(Date:7/26/2017)... , ... July 25, 2017 , ... ... and manufacturing services that are necessary in the preparation and development of human ... biorepository facility operates under the US Food and Drug Administration’s (FDA) Current Good ...
(Date:7/26/2017)... , ... July 26, 2017 , ... ... company for the improvement of crop productivity and economics for the food, feed ... The scope of the agreement includes the research and development of microbiome-based seed ...
Breaking Biology Technology: