Featured Research

from universities, journals, and other organizations

Gene variation among kidney donors associated with graft failure

Date:
April 8, 2010
Source:
JAMA and Archives Journals
Summary:
Among kidney transplant donors, variation of a gene that is an inhibitor of the development of fibrous connective tissue is significantly associated with an increased risk of graft failure, according to a new study.

Among kidney transplant donors, variation of a gene that is an inhibitor of the development of fibrous connective tissue is significantly associated with an increased risk of graft failure, according to a study in the April 7 issue of JAMA.

The gene CAV1 is involved in tissue fibrosis as well as vascular proliferation, important contributors to kidney transplant failure, according to information in the article. "No studies to date have addressed whether genetic variation of CAV1 increases propensity toward fibrosis in general or renal fibrosis specifically," the authors write.

Jason Moore, B.M.B.S., of the Renal Institute of Birmingham and University Hospital Birmingham, England, and colleagues conducted a study to assess the role of CAV1 variants in the development of kidney allograft fibrosis and in kidney transplantation outcome. Gene variation among both donors and recipients was investigated because cells derived from both may contribute to allograft fibrosis. The study included genomic DNA from 785 white kidney transplant donors and their respective recipients (transplantations in Birmingham, England, between 1996 and 2006; median [midpoint] follow-up, 81 months). DNA samples were analyzed for common variation in CAV1. Validation of positive findings was sought in an independent kidney transplant donor-recipient group (transplantations in Belfast, Northern Ireland, between 1986 and 2005; n = 697; median follow-up, 69 months). Analysis assessed any association between genotype and allograft failure.

The researchers found that analysis of allograft failure revealed significant differences in graft survival between donor genotypes for the tag single nucleotide polymorphism (SNP) rs4730751, with poorer graft survival in recipients whose donors displayed genotype AA. Overall, graft failure rates were 38.6 percent for donor genotype AA, 22.3 percent for donor genotype CC, and 22.2 percent for donor genotype AC. No other donor or recipient tag SNPs were associated with graft failure.

Data from the Belfast validation group indicated significant differences in graft survival between donor genotypes, and, as in the Birmingham group, poorer graft survival was seen in recipients whose donors displayed genotype AA. Overall graft failure rates were 67 percent for donor genotype AA, 42 percent for donor genotype CC, and 44 percent for donor genotype AC.

"Although a minority of donors displayed the AA genotype (approximately 10 percent), this gene variant nevertheless shows potential in identifying a subpopulation at higher risk of allograft failure, and further investigation of its role in the etiology of renal fibrosis may be warranted," the authors write.

"This finding has implications for renal transplantation with regard to the mechanisms underlying graft failure and in the identification of genetic biomarkers. In addition, because renal transplantation may be viewed as an in vivo model of accelerated tissue fibrosis, this study may have relevance for other renal and nonrenal diseases characterized by tissue fibrosis. Finally, this study may also have implications for other conditions in which CAV1 is thought to play a role, in particular vascular disease and neoplasia."


Story Source:

The above story is based on materials provided by JAMA and Archives Journals. Note: Materials may be edited for content and length.


Journal Reference:

  1. Jason Moore; Amy Jayne McKnight; Matthew J. Simmonds; Aisling E. Courtney; Rajesh Hanvesakul; Oliver J. Brand; David Briggs; Simon Ball; Paul Cockwell; Christopher C. Patterson; Alexander P. Maxwell; Stephen C. L. Gough; Richard Borrows. Association of Caveolin-1 Gene Polymorphism With Kidney Transplant Fibrosis and Allograft Failure. JAMA, 2010; 303 (13): 1282-1287 [link]

Cite This Page:

JAMA and Archives Journals. "Gene variation among kidney donors associated with graft failure." ScienceDaily. ScienceDaily, 8 April 2010. <www.sciencedaily.com/releases/2010/04/100406162939.htm>.
JAMA and Archives Journals. (2010, April 8). Gene variation among kidney donors associated with graft failure. ScienceDaily. Retrieved July 28, 2014 from www.sciencedaily.com/releases/2010/04/100406162939.htm
JAMA and Archives Journals. "Gene variation among kidney donors associated with graft failure." ScienceDaily. www.sciencedaily.com/releases/2010/04/100406162939.htm (accessed July 28, 2014).

Share This




More Health & Medicine News

Monday, July 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Trees Could Save More Than 850 Lives Each Year

Trees Could Save More Than 850 Lives Each Year

Newsy (July 27, 2014) A national study conducted by the USDA Forest Service found that trees collectively save more than 850 lives on an annual basis. Video provided by Newsy
Powered by NewsLook.com
Google's Next Frontier: The Human Body

Google's Next Frontier: The Human Body

Newsy (July 27, 2014) Google is collecting genetic and molecular information to paint a picture of the perfectly healthy human. Video provided by Newsy
Powered by NewsLook.com
What's To Blame For Worst Ebola Outbreak In History?

What's To Blame For Worst Ebola Outbreak In History?

Newsy (July 27, 2014) A U.S. doctor has tested positive for the deadly Ebola virus, as the worst-ever outbreak continues to grow. Video provided by Newsy
Powered by NewsLook.com
Losing Sleep Leaves You Vulnerable To 'False Memories'

Losing Sleep Leaves You Vulnerable To 'False Memories'

Newsy (July 27, 2014) A new study shows sleep deprivation can make it harder for people to remember specific details of an event. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins