Navigation Links
Immune cells halt round in space

An immune cell swallows a small capsule-shaped bacteria. The immune cells which help protect us from disease does not generally work the way they should in space travellers and it could be something to do with their shape. Researchers at NASA's Johnson Space Center (JSC) have been studying how immune cells behave in microgravity as part of their research on the health effects of space on astronauts.//

It has been found that astronauts have elevated virus levels their sneezes contain up to ten times more Epstein-Barr virus than normal Earth sneezes, for example. Looking at the key immune cells, researchers have found that B-cells, which produce antibodies to flag invading micro-organisms for destruction, and T-cells which actually physically attack them, have both been found to behave differently in space.

In space, T-cells do not multiply properly, neither move or signal each other as well and overall seem less able to destroy invaders. While one possibility is that the unique physical and psychological stresses of space flight might trigger immune-altering hormones, another possibility is that the weightlessness of space might be affecting the immune cells directly. To investigate this, NASA has developed a "rotating bioreactor" which allows researchers to investigate the possible effects of microgravity on individual immune cells without the complications of hormone effects.

The bioreactor consists of a rotating container full of a fluid which allows cells to remain suspended for months at a time in continual free fall, just as they would be in Earth orbit. According to Neal Pellis, chief of JSC's Biological systems Office, the cells in the bioreactor began to change in the first 15 minutes. One of the first changes was that T-cells were somehow forced to remain round and the researchers believe this could be responsible for the problems seen.

On Earth, T-cells can change their shape, protruding portions of themselves s o they can move around like amoebas. T-cells need to move in order to get to sites of infections, tumors and immune system organs. The changed shape could also make it harder for cells to communicate as their ability to interact is reduced by the rigid round shape. Researchers do not understand why the T-cells stay round in microgravity but suggest that intermolecular or submolecular forces such as hydrogen bonding might play a larger role in determining the cell's shape in the absence of Earth's gravity.

They say finding out is important to both astronauts and people on Earth since understanding the way physical forces affect T-cells could eventually enable scientists to control them. "There are times when we don't want them to invade - transplants, for example. And there are cases when we want them to act vigorously, like in tumors," said Pellis.


'"/>




Related medicine news :

1. Immune function could benefit from exercise
2. Reviving the Immune System
3. Wrestling found To Be Good for the Immune System
4. Immune Boost With LHRH To Help Cancer And Transplant Patients
5. Researchers Find Out The Cause Of Immune Attacks Behind Hearing Loss
6. Block Immune System Chemical For Treating Asthma
7. Immune Response Of Human Beings Can Be Re-energized
8. Weizmann Institute of Science says Immune Cells Could Help Maintain Brain Function
9. Antidepressant drugs interacts with Immune cells
10. Specific Immune Mechanism against DNA viruses
11. Immune response in Occupational metal fume inhaling workers
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/29/2017)... ... March 29, 2017 , ... AvePoint , the Microsoft Cloud expert, is ... Richmond, Virginia, located at the Riverfront Plaza, 901 East Byrd Street. AvePoint is celebrating ... Ralph S. Northam and Mayor of Richmond Levar M. Stoney. , Founded in 2001, ...
(Date:3/28/2017)... ... March 28, 2017 , ... Tuesday, March 28, 2017, ... public to take the Diabetes Risk Test to find out if they are at ... World Airports will light up the evening sky by programming the LAX pylons the ...
(Date:3/28/2017)... (PRWEB) , ... March 28, 2017 , ... ... its award-winning team. Ruel Williamson brings his extensive knowledge of appraisals, property values, ... leader in the real estate valuation industry for more than 40 years. , ...
(Date:3/28/2017)... ... March 29, 2017 , ... ... thyroid pharmacist Dr. Isabella Wentz, Pharm.D., FASCP. The program was recently launched on ... answering common questions regarding thyroid function. , Dr. Izabella Wentz is a ...
(Date:3/28/2017)... ... 28, 2017 , ... Medforce Technologies, Inc., a leading provider ... has joined the National Association for Home Care and Hospice (NAHC), the largest ... dying Americans of all ages and the caregiver who provide them with in-home ...
Breaking Medicine News(10 mins):
(Date:3/29/2017)... , March 29, 2017 On March 28, the U.S. ... adult patients with relapsing forms of multiple sclerosis (MS) ... first drug approved by the FDA for PPMS. Ocrevus ... professional.  "Multiple sclerosis can have a ... Dunn , M.D., director of the Division of Neurology ...
(Date:3/29/2017)... March 29, 2017 FinancialBuzz.com News Commentary  ... The U.S. could see ... a new report published by New Frontier Data, the legal cannabis ... pace of cannabis legalization in the United States ... considered to be a major factor that drives growth in this ...
(Date:3/28/2017)... YORK , March 28, 2017 "Chemotherapy Induced Neutropenia ... overview of the disease and global market trends of the Chemotherapy ... States , Europe ( France ... , Spain , UK) and Japan ... (RoE) and rest of the world (RoW). The ...
Breaking Medicine Technology: