Navigation Links
New insight into autoimmune disease: Bacterial infections promote recognition of self-glycolipids

The immune system is a complex and powerful weapon that provides protection against bacteria and viruses that, if left unchecked, would wreak havoc throughout the human body. The ability of the immune system to recognize the body's own tissues is essential, but sometimes the immune system loses the ability to distinguish "self" from potentially harmful invaders. This can lead to autoimmune disease characterized by destruction of healthy tissues. Although it is not clear exactly what causes the immune system to go awry, there is increasing evidence that in some cases infections with viruses or bacteria may play a role. Now, a new study published in the June issue of Immunity provides evidence that bacterial infections induce a kind of self-recognition that may contribute to some autoimmune diseases such as multiple sclerosis (MS) and Guillain-Barre syndrome (GBS).

There is evidence that the development of certain autoimmune diseases may be associated with a bacterial or viral infection that stimulates production of antibodies and immune cells called T cells, which are targeted against bacterial proteins that closely resemble "self" proteins, leading to crossreactivity with healthy tissues. Dr. Gennaro De Libero from University Hospital in Basel, Switzerland, and colleagues identified a different mechanism where bacterial infections promote activation of T cells that recognize molecules called glycosphingolipids (GSL) that are present in bacteria and humans. The researchers show that infection with some bacteria or even just exposure to pieces of the outer wall of the bacteria results in an increase in "self" GSL synthesis by cells that promote the immune response and subsequent stimulation of autoreactive GSL-specific T cells.

"Collectively, these findings suggest that recognition of self by infection is an important mechanism leading to autoreactive T cell activation and, possibly, participates in the pathogenesis of some autoimmune diseases, such as MS and GBS, in which the anti-GSL T cell response may be important," writes Dr. De Libero. The authors suggest that although the autoreactive T cells may play a useful role in promoting the immune response to infection, in the absence of infection the GSL autoreactive T cells might seek out the abundant "self" GSLs that can be found in the nervous system, resulting in degradation of brain and nerve tissue as is seen in patients with MS and GBS.


'"/>

Source:Cell Press


Related biology news :

1. New insight into people who see colors in letters and numbers
2. Alaskan puzzles, monitoring provide insight about North Pacific salmon runs
3. New insight into regulation of blood stem cells
4. New insights into how Huntingtons disease attacks the brain
5. Gambling monkeys give insight into neural machinery of risk
6. Structures of marine toxins provide insight into their effectiveness as cancer drugs
7. Flies on speed offer insight into the roles of dopamine in sleep and arousal
8. Grasshopper love songs give insight into sensory tuning
9. Studies on human genome variation provide insight into disease
10. Study provides insight into cellular defenses against genetic mutation
11. New insights into the software of life
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/2/2016)... June 2, 2016 Perimeter Surveillance ... Unmanned Systems, Physical Infrastructure, Support & Other Service  ... visiongain offers comprehensive analysis of the global ... will generate revenues of $17.98 billion in 2016. ... Inc, a leader in software and hardware technologies for ...
(Date:5/16/2016)... , May 16, 2016   EyeLock LLC ... today announced the opening of an IoT Center of ... strengthen and expand the development of embedded iris biometric ... unprecedented level of convenience and security with unmatched biometric ... one,s identity aside from DNA. EyeLock,s platform uses video ...
(Date:4/28/2016)... FRANCISCO and BANGALORE, India , ... of EdgeVerve Systems, a product subsidiary of Infosys (NYSE: ... provider, today announced a global partnership that will ... way to use mobile banking and payment services. ... is a key innovation area for financial services, but it ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... Rolf K. Hoffmann, former senior ... the University of North Carolina Kenan-Flagler Business School effective June 27. ... Kenan-Flagler, with a focus on the school’s international efforts, leading classes and participating ...
(Date:6/24/2016)... 24, 2016 Epic Sciences unveiled a ... susceptible to PARP inhibitors by targeting homologous recombination ... The new test has already been incorporated into ... cancer types. Over 230 clinical trials ... pathways, including PARP, ATM, ATR, DNA-PK and WEE-1. ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... to announce the launch of their brand, UP4™ Probiotics, into Target stores nationwide. ... years, is proud to add Target to its list of well-respected retailers. This ...
(Date:6/23/2016)... HOUSTON , June 23, 2016 ... agreement with the Cy-Fair Sports Association to serve ... of the agreement, Houston Methodist Willowbrook will provide ... education and connectivity with association coaches, volunteers, athletes ... partner with the Cy-Fair Sports Association and to ...
Breaking Biology Technology: