Navigation Links
Space Radiation a Risk for Astronauts

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:
Related Image:
 Space Radiation a Risk for  Astronauts
(Date:11/27/2015)... ... November 27, 2015 , ... MPWH, the No.1 Herpes-only dating community in the world, ... Table 1-1 ). More than 3.7 billion people under the age of 50 – ... according to WHO's first global estimates of HSV-1 infection . , "The data shocks ...
(Date:11/27/2015)... ... November 27, 2015 , ... Intellitec Solutions ... SL User Group (MSDSLUG). Recognized as Microsoft’s official group for end users of ... SL software users, partners, industry experts and representatives. Intellitec Solutions’ membership status demonstrates ...
(Date:11/27/2015)... MINNEAPOLIS, Minn. (PRWEB) , ... November 27, 2015 ... ... you start failing. Secura Consultants has prided itself for not only fulfilling the ... best income protection solutions at an affordable price and providing top-tier customer service. ...
(Date:11/27/2015)... (PRWEB) , ... November 27, 2015 , ... CBD ... Accreditation of Allied Health Education Programs (CAAHEP) awarded accreditation to its Diagnostic Medical Sonography ... CAAHEP accredited colleges, as only one of twelve colleges and universities in the state ...
(Date:11/27/2015)... Rosa, CA (PRWEB) , ... November 27, 2015 , ... ... Northern California Medical Associates, Inc. and Dr. Tucker Bierbaum with Emergency Medicine at ... meeting. They observed that both STEMI and Sepsis conditions present in similar ways and ...
Breaking Medicine News(10 mins):
(Date:11/26/2015)... 26, 2015 ... "2016 Future Horizons and Growth Strategies ... Market: Supplier Shares, Country Segment Forecasts, Competitive ... offering. --> ) has ... Future Horizons and Growth Strategies in the ...
(Date:11/26/2015)... DUBLIN , November 26, 2015 ... of the "Self Administration of High Viscosity ... ) has announced the addition of ... report to their offering. --> ... the addition of the "Self Administration of ...
(Date:11/25/2015)... 2015  The total global healthcare industry is expected to ... Latin America has the highest projected growth ... Japan ), is second with growth projected at ... increased healthcare expenditure. In 2013-2014, total government funded healthcare was ... 2008-2009 to 41.2% in 2013-2014. In real terms, out of ...
Breaking Medicine Technology: