Navigation Links
Gene linked to lupus might explain gender difference in disease risk
Date:3/29/2009

DALLAS March 30, 2009 In an international human genetic study, researchers at UT Southwestern Medical Center have identified a gene linked to the autoimmune disease lupus, and its location on the X chromosome might help explain why females are 10 times more susceptible to the disease than males.

Identifying this gene, IRAK1, as a disease gene may also have therapeutic implications, said Dr. Chandra Mohan, professor of internal medicine and senior author of the study. "Our work also shows that blocking IRAK1 action shuts down lupus in an animal model. Though many genes may be involved in lupus, we only have very limited information on them," he said.

The study appears online this week in the Proceedings of the National Academy of Sciences.

Locating IRAK1 on the X chromosome also represents a breakthrough in explaining why lupus seems to be sex-linked, Dr. Mohan said. For decades, researchers have focused on hormonal differences between males and females as a cause of the gender difference, he pointed out.

"This first demonstration of an X chromosome gene as a disease susceptibility factor in human lupus raises the possibility that the gender difference in rates may in part be attributed to sex chromosome genes," Dr. Mohan said.

Systemic lupus erythematosus, or lupus for short, causes a wide range of symptoms such as rashes, fever or fatigue that make it difficult to diagnose.

The multicenter study involved 759 people who developed lupus as children, 5,337 patients who developed it as adults, and 5,317 healthy controls. Each group comprised four ethnicities: European-Americans, African-Americans, Asian-Americans and Hispanic-Americans.

In previous genetic studies, the researchers had found an association but not a definite link between lupus and IRAK1.

For the current study, the researchers studied five variations of the IRAK1 gene in the subjects, and found that three of the five variants were common in people with either childhood-onset or adult-onset lupus.

To further test the link, the researchers then took mice of a strain that normally is prone to developing lupus and engineered them to lack the IRAK1 gene. In the absence of IRAK1, the animals lacked symptoms associated with lupus, including kidney malfunction, production of autoimmune antibodies and activation of white blood cells.

"The extensive involvement of IRAK1 in the regulation of the immune response renders its association with lupus a prime candidate for careful genetic and functional analysis," Dr. Mohan said.

Future research will investigate the role that X-linked genes, versus hormonal differences, play in the gender susceptibility rates of lupus.


'/>"/>

Contact: Aline McKenzie
aline.mckenzie@utsouthwestern.edu
214-648-3404
UT Southwestern Medical Center
Source:Eurekalert  

Related biology news :

1. Genetic irregularities linked to higher risk of COPD among smokers
2. Genes identified that are linked to spinal disc degeneration
3. Cats eye diseases genetically linked to diseases in humans
4. Researchers capture wave of brain activity linked to anticipation
5. Decline of shorebird linked to bait use of horseshoe crabs
6. Researchers isolate protein domain linked to tumor progression
7. Researchers identify gene linked to aggressive progression of liver cancer
8. Scientists uncover new genetic variations linked to psoriasis
9. Global warming linked to European viral epidemic
10. Team finds breast cancer gene linked to disease spread
11. Impaired energy metabolism linked with initiation of plaques in Alzheimers brain
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Gene linked to lupus might explain gender difference in disease risk
(Date:6/1/2016)... , June 1, 2016 ... in Election Administration and Criminal Identification to Boost Global ... a recently released TechSci Research report, " Global Biometrics ... Region, Competition Forecast and Opportunities, 2011 - 2021", the ... billion by 2021, on account of growing security concerns ...
(Date:5/9/2016)... DUBAI , UAE, May 9, 2016 ... choice when it comes to expanding freedom for high ... Even in today,s globally connected world, there ... online conferencing system could ever duplicate sealing your deal ... are obtaining second passports by taking advantage of citizenship ...
(Date:4/26/2016)... -- Research and Markets has announced the ...  report to their offering.  , ,     (Logo: ... forecast the global multimodal biometrics market to grow ... 2016-2020.  Multimodal biometrics is being implemented ... healthcare, BFSI, transportation, automotive, and government for controlling ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... , June 23, 2016   Boston ... of novel compounds designed to target cancer stemness ... has been granted Orphan Drug Designation from the ... treatment of gastric cancer, including gastroesophageal junction (GEJ) ... inhibitor designed to inhibit cancer stemness pathways by ...
(Date:6/23/2016)... , June 23, 2016 Houston ... with the Cy-Fair Sports Association to serve as ... the agreement, Houston Methodist Willowbrook will provide sponsorship ... and connectivity with association coaches, volunteers, athletes and ... with the Cy-Fair Sports Association and to bring ...
(Date:6/23/2016)... , June, 23, 2016  The Biodesign Challenge ... envision new ways to harness living systems and biotechnology, ... Art (MoMA) in New York City ... 130 participating students, showcased projects at MoMA,s Celeste Bartos ... Paola Antonelli , MoMA,s senior curator of architecture and ...
(Date:6/23/2016)... ... June 23, 2016 , ... STACS DNA Inc., the sample tracking software company, ... Crime Laboratory, has joined STACS DNA as a Field Application Specialist. , “I ... President and COO of STACS DNA. “In further expanding our capacity as a scientific ...
Breaking Biology Technology: