Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Genes, not race, determine donor kidney survival

10.05.2011
Implications for kidney transplant recipients and kidney donors

Tuesday, May 10, 2011 – A new study by researchers at Wake Forest Baptist Medical Center sheds light on what causes certain kidneys to do better than others after being transplanted, providing doctors with an easy way to screen for donor kidneys that have the best chance of survival.

"It's been long observed that kidneys taken from some black donors just don't last as long as those taken from non-black donors, and the reason for that has not been known," said Barry I. Freedman, M.D., John H. Felts III Professor and senior investigator. "This study reveals that the genetic profile of the donor has a marked affect on graft survival after transplantation. We now know that these organs aren't failing because they came from black donors, but rather because they came from individuals with two copies of a specific recessive gene."

The study appears in the May issue of the American Journal of Transplantation.

Freedman and co-researchers at Wake Forest Baptist examined 12 years' worth of medical records dating back to 1998, looking for all patients who received a kidney transplant from a black deceased donor whose genetic information had been recorded. The search yielded 106 black donors – from whom one or both kidneys were transplanted – for a total of 136 donated kidneys.

The researchers identified that kidneys from donors who had specific coding changes in a gene called apolipoprotein L1 (APOL1) did not last as long after transplant as those from donors without these changes. These coding changes in the APOL1 gene that affect kidney transplant function are found in about 10 to 12 percent of black individuals. Recent studies, led by Freedman and his colleagues, have shown that these genetic changes are associated with an increased risk of kidney disease, which prompted researchers to investigate the role of these changes in transplant success.

"In looking at the records and follow-up of the recipients of these organs, we accounted for all the usual factors that are known to contribute to more rapid loss of kidney function after transplant," said Freedman, chief of the section on nephrology. "What we found was that the kidney disease-causing risk variants in APOL1 were the strongest predictor of graft loss after transplant. The effect of having two copies of this gene was stronger than the impact of genetic matching between donor and recipient, the amount of time the organ was out of the body, and the antibody levels. APOL1 dwarfed all these other factors known to affect survival."

If the finding is confirmed by other researchers, it has the potential to dramatically improve outcomes for both the individuals undergoing kidney transplantation and those considering kidney donation, Freedman said. It could revolutionize donor selection criteria, allowing transplant physicians the ability to identify kidneys that are likely to function for shorter periods of time. In addition, this screening tool has the potential to help doctors protect potential donors who may be at risk of developing kidney disease down the road.

"It is exciting to see that research done at Wake Forest Baptist could impact kidney transplantation throughout the world," Freedman said. "We have shown for the first time that genetic risk variants in kidney donors are associated with markedly different outcomes after kidney transplantation. This finding could dramatically change the way we practice."

Co-authors on the study, funded by the National Institutes of Health, were: lead author Amber M. Reeves-Daniel, D.O., John A. DePalma, D.O., Anthony J. Bleyer, M.D., Michael V. Rocco, M.D., MSCE, Mariana Murea, M.D., Patricia L. Adams, M.D., Carl D. Langefeld, Ph.D., Donald W. Bowden, Ph.D., Pamela J. Hicks, B.S., Robert J. Stratta, M.D., Jen-Jar Lin, M.D., David F. Kiger, B.S., Michael D. Gautreaux, Ph.D., and Jasmin Divers, Ph.D., all of Wake Forest Baptist.

Media Relations Contacts: Jessica Guenzel, jguenzel@wakehealth.edu, (336) 716-3487; or Bonnie Davis, bdavis@wakehealth.edu, (336) 716-4977.

Wake Forest Baptist Medical Center (www.wakehealth.edu) is a fully integrated academic medical center located in Winston-Salem, N.C. Wake Forest School of Medicine directs the education and research components, with the medical school ranked among the nation's best and recognized as a leading research center in regenerative medicine, cancer, the neurosciences, aging, addiction and public health sciences. Piedmont Triad Research Park, a division of Wake Forest Baptist, fosters biotechnology innovation in an urban park community. Wake Forest Baptist Health, the clinical enterprise, includes a flagship tertiary care hospital for adults, Brenner Children's Hospital, a network of affiliated community-based hospitals, physician practices and outpatient services. The institution's clinical programs and the medical school are consistently recognized as among the best in the country by U.S.News & World Report.

Jessica Guenzel | EurekAlert!
Further information:
http://www.wakehealth.edu

Further reports about: APOL1 Medical Wellness genes health services kidney disease kidney transplant

More articles from Life Sciences:

nachricht Repairing damaged hearts with self-healing heart cells
22.08.2017 | National University Health System

nachricht Biochemical 'fingerprints' reveal diabetes progression
22.08.2017 | Umea University

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

Cholesterol-lowering drugs may fight infectious disease

22.08.2017 | Health and Medicine

Meter-sized single-crystal graphene growth becomes possible

22.08.2017 | Materials Sciences

Repairing damaged hearts with self-healing heart cells

22.08.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>