Navigation Links
Space Radiation a Risk for Astronauts
Date:4/15/2008

Risk of colon cancer, premature aging poses worries for manned missions to moon, Mars

TUESDAY, April 15 (HealthDay News) -- Astronauts may be at increased risk of colon cancer and premature aging from the high-energy radiation found in space, a new report says.

The study, expected to be presented Tuesday during the American Association for Cancer Research annual meeting in San Diego, has implications for the long-term space travel necessary for Project Constellation, the recently launched NASA program to return humans to the moon and then on to Mars.

"Radiation exposure, either intentional or accidental, is inevitable during our lifetimes," study author Kamal Datta, an assistant professor at the Lombardi Comprehensive Cancer Center at Georgetown University Medical Center, said in a prepared statement. "But with plans for a mission to Mars, we need to understand more about the nature of radiation in space. There is currently no conclusive information for estimating the risk that astronauts may experience."

Researchers exposed mice to the high linear energy transfer (LET) radiation similar to that found in space. They found that it created a highly oxidative cellular environment in the gastrointestinal tract over prolonged periods of time, a condition favorable for cancer development.

High-LET radiation is found in solar flares. The earth's atmosphere blocks much of this radiation from reaching us.

The radiation produced free radicals that damage a cell's DNA. Over time, accumulated damage can lead to mutations -- and, in some cases, malignant tumors. Datta and colleagues also noted the cell's stress response to the free radical damage continued up to two months after exposure to the high-LET radiation.

Also, the mice exposed to the high-LET radiation aged prematurely, researchers said. Datta said their fur became prematurely gray, an observation the team plans to follow-up with MRI brain scans.

This is not the first possible link between space travel and cancer. The National Academies reported in 2004 that it had found the frequency of cancer in the astronaut population was higher than the incidence among the general U.S. population.

More information

The American Association of Retired Persons has more about how free radicals affect the body.



-- Kevin McKeever



SOURCE: Georgetown University, news release, April 15, 2008


'/>"/>
Copyright©2008 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. On The Go Healthcare Sells VAR Business to Wireless and Internet Space Development Leader FTS Group
2. Life Spine Expands Home Office Space, More Than Doubling Space Occupied
3. Globus Medical Launches NIKO(TM) Corpectomy Spacer System
4. Earth from Space: Splitting iceberg
5. VA Research Project on NASA Space Shuttle
6. Space sentinels: New tools in space to improve European environment and security policies
7. Moog to Present at Cowen & Co. Aerospace and Defense Conference on February 5, 2008
8. Brain stem cells sensitive to space radiation
9. The development of a language in space -- Israeli Sign Language
10. DeviceSpace Career Fair Opens Doors for Hundreds of Medical Device and Diagnostics Career Candidates
11. Space sensors shed new light on air quality
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
 Space Radiation a Risk for  Astronauts
(Date:10/13/2017)... ... October 13, 2017 , ... The International ... promote standards of excellence for the field of eating disorders, announces the opening ... 25, 2018 in Orlando, Florida at the Omni Resort at ChampionsGate. ...
(Date:10/13/2017)... Ill. (PRWEB) , ... October ... ... Edwardsville School of Pharmacy (SOP) alumni Hannah Randall, PharmD ‘17, and Jennifer ... healthcare professionals on guideline updates for the primary prevention of cardiovascular diseases ...
(Date:10/13/2017)... ... ... Apple Rehab Shelton Lakes , which specializes in the delivery of ... part of a disaster drill on October 3rd. , Apple Rehab participated with the ... as well as the Connecticut Long Term Care Mutual Aid Plan (LTC-MAP). The ...
(Date:10/13/2017)... ... 13, 2017 , ... The Visiting Nurse Association (VNA) of Somerset Hills is ... vendors and unique items from across the nation, this holiday-themed event will raise funds ... by the VNA. The boutique will be open Saturday, November 4 (10:00 a.m. ...
(Date:10/13/2017)... NJ (PRWEB) , ... October 13, 2017 , ... Global ... at scenic Alexandria Park in Milford, NJ. This free event, sponsored by Global ... physical activity. The fun run is geared towards children of all ages; it ...
Breaking Medicine News(10 mins):
(Date:10/11/2017)... MENLO PARK, Calif. , Oct. 11, 2017 /PRNewswire/ ... a national scientific team that developed an innovative way ... and quantity of the delivery of new drugs. ... the 2017 Fall Clinical Dermatology Conference will show how ... Massachusetts General Hospital, Harvard Medical School used a suite ...
(Date:10/11/2017)... , Oct. 11, 2017  True Health, ... has amplified its effort during National Breast Cancer ... hereditary cancer risks. ... Clinical Oncology calculated that more than 10 million ... inherited mutations in BRCA1 or BRCA2 and have not ...
(Date:10/10/2017)... 2017  NDS received FDA 510(k) clearance in May 2017 for ... stand specifically designed for endoscopy environments. An innovative secondary monitor solution, ... solution to support the improvement of patient outcomes, procedural efficiency, and ... ... ...
Breaking Medicine Technology: