Navigation Links
Study in roundworm chromosomes may offer new clues to tumor genome development
Date:4/21/2011

CHAPEL HILL, N.C. A study of DNA rearrangements in roundworm chromosomes may offer new insight into large-scale genome duplications that occur in developing tumors.

A report of the research led by University of North Carolina at Chapel Hill School of Medicine scientists was published in the April 22 online edition of the journal Science. The study focused on telomeres, a region of repetitive DNA sequence that protects the ends of chromosomes from deterioration or from fusing with other chromosomes.

In many organisms, including humans, chromosome ends are capped by simple repetitive sequences that are replenished by addition of new telomere repeats by the enzyme telomerase. Since most human cells don't produce enough of the enzyme, they are unable to maintain the repeat DNA sequences that cap their chromosome ends.

"Once telomere repeat sequences erode completely, a chromosome end will 'uncap' and fuse with another uncapped chromosome end," said senior study author Shawn Ahmed, PhD, associate professor of genetics and a member of the UNC Lineberger Comprehensive Cancer Center. "Thus, the chromosome aberrations that we isolated from telomerase mutants in the common roundworm C. elegans were end-to-end chromosome fusions."

Ahmed points out that during development of many forms of cancer, chromosome ends erode and 'uncap', and many end-to-end chromosome fusions occur. These fusions create genome rearrangements that may contribute to tumor development.

The new findings tested predictions of a long-standing model developed in the 1940s by geneticist Barbara McClintock, 1983 Nobel Laurate in Physiology or Medicine. This model, termed the breakage-fusion-bridge cycle, suggested that DNA duplications at fused chromosome ends should be perfect inverted duplications that are created by fusion and then breakage of a fused chromosome during the process of cell division, mitosis.

"Surprisingly, many of the duplic
'/>"/>

Contact: Les Lang
llang@med.unc.edu
919-966-9366
University of North Carolina School of Medicine
Source:Eurekalert

Page: 1 2

Related biology news :

1. Long-term study shows effect of climate change on animal diversity
2. £2 million study to reveal workings of dementia genes
3. New study looks to define evangelicals and how they affect polling
4. CU-Boulder study suggests air quality regulations miss key pollutants
5. Researchers study acoustic communication in deep-sea fish
6. Study reveals homeowner perceptions in fire-prone areas
7. Researchers study how pistachios may improve heart health
8. Study: urban black bears live fast, die young
9. New study indicates link between weight gains during pregnancy and dieting history
10. Study reveals specific gene in adolescent men with delinquent peers
11. Sweat it out: UH study examines ability of sweat patches to monitor bone loss
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/18/2014)... suspected genetic conditions, a certain type of exome sequencing ... than traditional molecular diagnostic methods, according to a study ... released to coincide with the American Society of Human ... protein­coding region of the genome (the complete set of ... organism), has been rapidly applied in research settings and ...
(Date:10/17/2014)... the University of Copenhagen have shown for the first ... of Cystic fibrosis patients, giving them the opportunity to ... chronic infections. , The study also discovered the bacterial ... patients was halted or slowed down by the immune ... the oxygen and helped "suffocate" the bacteria, forcing the ...
(Date:10/16/2014)... and Mary,s Virginia Institute of Marine Science have ... Protection Agency to identify the streams and wetlands ... tools to help local governments and citizens conserve ... on a dataset of tidal-marsh observations first gathered ... this historical baseline can today,s researchers accurately map ...
Breaking Biology News(10 mins):Study examines type of exome sequencing and molecular diagnostic yield 2Study examines type of exome sequencing and molecular diagnostic yield 3Scientists opens black box on bacterial growth in cystic fibrosis lung infection 2EPA grant will help localities conserve headwater wetlands 2EPA grant will help localities conserve headwater wetlands 3
... developed a technique that improves and cuts the cost ... in cell membranes using an electric field to introduce ... and expensive whereas the new system manages to apply ... which costs less than a Euro per unit and ...
... Inc., today announced that its 12,200 Online Books ... of HINARI, AGORA and OARE, benefitting research and ... including Malawi, Cambodia, and Bolivia. Research4Life provides ... low cost access to peer-reviewed online content from ...
... , Feb. 6, 2013 /PRNewswire-iReach/ -- Successful businesses ... forge new business relationships with industry leaders at ... Information (GII). Attendees go to learn about ... tactics for minimizing costs and risks while overcoming ...
Cached Biology News:A Spanish breakthrough allows the electroporation of cell cultures for less than 1 Euro 2A Spanish breakthrough allows the electroporation of cell cultures for less than 1 Euro 3Over 12,000 Wiley Online Books made available in developing countries via Research4Life 2Early Bird Conference Registrations Expiring This Friday 2Early Bird Conference Registrations Expiring This Friday 3Early Bird Conference Registrations Expiring This Friday 4
(Date:10/22/2014)... Cranford, NJ (PRWEB) October 22, 2014 ... technologies and services – has been working with a ... Health and New Haven Farms Community Farming Collaborative to ... iPad-based ePRO solution. The study, which started in ... Wellness program that provides participants weekly exposure to and ...
(Date:10/22/2014)... According to new market research report "Cloud ... Deployment & Support), by Service Model (SaaS, PaaS, ... (Hybrid & Community)) - Global Forecast to 2019", ... Professional Services Market into various sub-segments with an ... identifies the drivers and restraints for this market ...
(Date:10/22/2014)... 2014 Research and Markets  has announced ... Material, by Application, Geography - Global Analysis and Forecast ... Organic electronics, also called as polymer electronics ... which deals with small conductive molecules and electrically conductive ... and polymers are carbon based, made using synthetic strategies ...
(Date:10/20/2014)... Convey Computer , the leader in hybrid-core ... University won first place in the 2014 MemoCODE ... team’s solution achieved the highest overall performance in the ... finisher. , Experts from all segments of the commercial ... using a variety of design tools, hardware and software. ...
Breaking Biology Technology:myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 2myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 2Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 4Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 5Global Organic Electronics (Semiconductor, Conductive, Dielectric and Substrate) Market - Analysis and Forecast (2014 - 2020) 2Global Organic Electronics (Semiconductor, Conductive, Dielectric and Substrate) Market - Analysis and Forecast (2014 - 2020) 3Team from Iowa State Wins 2014 MemoCODE Design Contest Using Convey HC-2ex 2Team from Iowa State Wins 2014 MemoCODE Design Contest Using Convey HC-2ex 3
... April 11 ABR-Affinity,BioReagents, a leading global antibody manufacturer, ... Cancer Research (AACR),and will exhibit at the annual meeting ... - 16, 2008., "The AACR meeting is a ... a,significant portion of our corporate resources to supporting biological,research ...
... Blood America,Inc. (OTC Bulletin Board: CBAI), the umbilical ... focused on bringing,the life saving potential of stem ... has joined New York and California,in passing a ... potential,benefits of umbilical cord blood banking. The bill ...
... HILL, N.C., April 10 Thought leaders ... Depot, Qualcomm,Nationwide and others will address new ... in today,s competitive economy at the 10th,Annual ... & Retaining Top Talent, sponsored by Best ...
Cached Biology Technology:ABR-Affinity BioReagents to Participate in the American Association for Cancer Research Meeting in San Diego, California, April 12 - 16, 2008 2Cord Blood America Says Pennsylvania Joins New York and California in Establishing Educational Programs on the Benefits of Umbilical Cord Blood Storage 2Pharmaceuticals & Biotechs to Share Insights for Developing Leaders in a Fast-Paced, Competitive Industry 2
... The LXQ linear ion trap mass ... paced analytical laboratory., The LXQ linear ion ... discovery and proteomic applications, delivering the fast ... Thermo linear ion trap at an attractive ...
... S&S Custom Processing Service enables scientists who do ... data analysis software to have their biological samples ... analytes. Its as easy as 1-2-3 ... in your samples from the S&S antibody menu. ...
... 2) Dot plot, Contour plot, Density Plot, ... 4) Cell Cycle 5) Analysis Platform ... generation of graphs and statistics 8) Advanced ... to perform complex batch analyses 10) Exporting ...
... PEP-174 is a 12 amino acid synthetic peptide whose ... of this peptide is (amino to carboxy terminus): C ... - S - Q - V - A - P ... neutralization and control experiments with the polyclonal antibody that reacts ...
Biology Products: