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:10/13/2017)... ... October 13, 2017 , ... The International Association of ... of excellence for the field of eating disorders, announces the opening of early ... in Orlando, Florida at the Omni Resort at ChampionsGate. , The ...
(Date:10/13/2017)... ... , ... Many families have long-term insurance that covers care for a family ... for care if the client has a cognitive impairment diagnosis. , “What this ... often waived, so the benefits from their insurance start immediately,” said Mechell Vieira, owner ...
(Date:10/13/2017)... (PRWEB) , ... October 13, 2017 , ... ... will be giving viewers the lowdown on sciatica in a new episode of ... that focuses on current events and innovation and investigates each subject in-depth with ...
(Date:10/12/2017)... Francisco, CA (PRWEB) , ... October 12, 2017 ... ... Dr. Cheng, are now treating sleep apnea using cutting-edge Oventus O2Vent ... apnea, a serious sleep disorder characterized by frequent cessation in breathing. Oral appliances ...
(Date:10/12/2017)... (PRWEB) , ... October 12, 2017 , ... ... AccentCare, a leader in post-acute health care, have expanded their existing home health ... Home Health. , AccentCare has been operating a joint venture home health company ...
Breaking Medicine News(10 mins):
(Date:10/12/2017)... , Oct. 12, 2017 AVACEN Medical , ... company with their  2017 New Product Innovation Award for ... extensive primary and secondary medical device market research by Frost ... its first-to-market OTC, drug-free pain relief product, the AVACEN 100, ... to treating fibromyalgia widespread pain. ...
(Date:10/11/2017)... , Oct. 11, 2017  Caris Life Sciences ... on fulfilling the promise of precision medicine, today announced ... joined Caris, Precision Oncology Alliance™ (POA) as its 17 ... centers, the St. Jude Crosson Cancer Institute will help ... the use of tumor profiling, making cancer treatment more ...
(Date:10/10/2017)... , Oct. 10, 2017   West Pharmaceutical Services, ... solutions for injectable drug administration, today shared the results ... Adapter for improving the intradermal administration of polio vaccines. ... Vaccination Summit in May 2017 by Dr. Ondrej ... Department, World Health Organization (WHO), and recently published in ...
Breaking Medicine Technology: