Navigation Links
Thank Neanderthals for That Healthy Immune System, Scientists Say
Date:8/25/2011

THURSDAY, Aug. 25 (HealthDay News) -- Interbreeding between modern humans, Neanderthals and another close relative may have passed on genes that boost peoples' immune systems today, researchers report.

Modern humans, Neanderthals and a recently discovered relative called Denisovans share a common African ancestor, the team of scientists explained in the Aug. 25 online issue of Science. However, the groups diverged into separate, distinct populations about 400,000 years ago, noted the Stanford University School of Medicine researchers.

Neanderthals moved into Europe and West Asia, Denisovans migrated into East Asia, and modern humans remained in Africa until about 65,000 years ago. But as modern humans expanded their range out of Africa they came into contact with the two other groups and interbreeding is thought to have occurred.

The last Neanderthals died about 30,000 years ago, but research has shown that some modern humans have as much as 4 percent Neanderthal DNA. People living today also have up to 6 percent of their DNA from Denisovans, a species which has only recently been identified.

The authors of this new study have found that this crossbreeding gave modern humans new variants of immune system genes called HLA class I genes. This DNA plays a crucial role in people's ability to identify and kill pathogens.

"The cross breeding wasn't just a random event that happened, it gave something useful to the gene pool of the modern human," senior author Peter Parham, a professor of structural biology and of microbiology and immunology, said in a Stanford news release.

The amount of people's HLA class I genes attributed to now-extinct Neanderthals or Denisovans varies widely depending on geography, his team added. For example, people from Papua New Guinea owe up to 95 percent of their gene variants from one class of HLA to this intermixing with the two other species, compared to 80 percent for Asians and 50 percent for Europeans.

More information

The Smithsonian Institution has more about human evolution.

-- Robert Preidt

SOURCE: Stanford University, news release, Aug. 25, 2011


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. GNC Says Thank You to Customers and Employees for Their $1.4 Million in Donations to the Sixth Annual St. Jude Childrens Research Hospital(R) Thanks and Giving(R) Campaign
2. A Simple Thank You Brings Rewards to All
3. Thanks to a New Stem Cell Therapy, a 9-year Old Autistic Boy Talks to his Father for the First Time
4. Over 450 Patients Now Toenail Fungus Free Thanks to Your Next Step's New Toenail Fungus Laser Treatment Technology
5. Raleigh Surgeon Offers Deep Savings on LASIK and PRK as a Thank You to Military, Police and Fire Personnel
6. 10 Million Cigarette Butts Prevented from Touching the Ground in Spokane County, Washington, Thanks to Smart Smoke Electronic Cigarette
7. Kids' Lunchboxes Go Bento for Easy Back to School Lunch Making, Thanks to Laptop Lunches
8. Friendships, family relationships get better with age thanks to forgiveness, stereotypes
9. COPD patients may breathe easier, thanks to the Wii
10. Ex-Dallas Maverick survives rare form of leukemia thanks to experimental drug treatment
11. Fossil Teeth of Neanderthals Reveal Fast Track to Maturity
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Thank Neanderthals for That Healthy Immune System, Scientists Say
(Date:6/27/2016)... ... , ... TherapySites, the leading website and online ... Counseling Association. This new relationship allows TherapySites to continue to extend their ... benefits and promotional offers. , "TCA is extremely excited about this new partnership, ...
(Date:6/26/2016)... ... June 26, 2016 , ... On June 10-11, 2016, ... the 2016 Cereal Festival and World’s Longest Breakfast Table in Battle Creek, MI, where ... city’s history as home to some of the world’s leading providers of cereal and ...
(Date:6/25/2016)... (PRWEB) , ... June 25, 2016 , ... ... health policy issues and applications at AcademyHealth’s Annual Research Meeting June 26-28, 2016, ... work on several important health care topics including advance care planning, healthcare costs ...
(Date:6/25/2016)... ... June 25, 2016 , ... As a lifelong Southern Californian, Dr. Omkar ... M.D from the David Geffen School of Medicine at UCLA. He trained in Internal ... complete his fellowship in hematology/oncology at the UCLA-Olive View-Cedars Sinai program where he had ...
(Date:6/24/2016)... ... ... Those who have experienced traumatic events may suffer from a complex set of ... or alcohol abuse, as a coping mechanism. To avoid this pain and suffering, Serenity ... event. , Trauma sufferers tend to feel a range of emotions, from depression, guilt, ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... , , , WHEN: , , ... , , , LOCATION: , , , Online, with free registration ... PANELISTS:  , , , Frost & Sullivan,s Global Vice President of ... Analyst, Divyaa Ravishankar and Unmesh Lal, Program Manager , ... witnessing an exceptional era. Several new demand spaces, such as innovative ...
(Date:6/23/2016)... Revolutionary technology includes multi-speaker listening ... industry leaders in advanced audiology and hearing aid technology, ... ™, the world,s first internet connected hearing aid that ...      (Photo: http://photos.prnewswire.com/prnh/20160622/382240 ) , ... ,world firsts,: , TwinLink™ - the first ...
(Date:6/23/2016)... , June 23, 2016 ... "Surgical Procedure Volumes: Global Analysis (United States, China, ... Canada)" report to their offering. ... essential tool for healthcare business planners, provides surgical procedure ... at surgery trends with an in-depth analysis of growth ...
Breaking Medicine Technology: