Navigation Links
Factors from common human bacteria may trigger multiple sclerosis
Date:11/23/2009

Farmington, CT Current research suggests that a common oral bacterium may exacerbate autoimmune disease. The related report by Nichols et al, "Unique Lipids from a Common Human Bacterium Represent a New Class of TLR2 Ligands Capable of Enhancing Autoimmunity," appears in the December 2009 issue of The American Journal of Pathology.

Multiple sclerosis (MS), a disease where the immune system attacks the brain and spinal cord, affects nearly 1 in 700 people in the United States. Patients with multiple sclerosis have a variety of neurological symptoms, including muscle weakness, difficulty in moving, and difficulty in speech.

Porphyromas gingivalis, a common oral bacterium in humans, produces a unique type of lipid, phosphorylated dihydroceramides (DHCs), which enhance inflammatory responses. These lipids are also likely produced by bacteria found in other parts of the body including the gastrointestinal tract. To determine if these lipids accentuate immune-mediated damage in autoimmune disease, researchers led by Robert B. Clark and Frank C. Nichols of the University of Connecticut Health Center administered phosphorylated DHCs in a mouse model of MS. The severity of disease was significantly enhanced by the addition of these lipids in a manner that was dependent on activation of the immune system. These data suggest that phosphorylated DHCs from bacteria commonly found in humans may trigger or increase the severity of autoimmune diseases such as multiple sclerosis.

The authors state that "while it is clear that the immune system in most individuals has the potential to attack self-tissues, the "tipping" factors that initiate and propagate autoimmune diseases such as multiple sclerosis in only a subset of individuals remain unknown. Overall, [their] results represent the first description that phosphorylated DHCs derived from common human bacteria are capable of enhancing autoimmune disease." Thus, these lipids may function as "tipping" factors, playing a previously unrecognized role in initiating or exacerbating human autoimmune diseases. In future studies, Dr. Clark and colleagues plan to characterize the effects of phosphorylated DHCs on specific cells of the immune system and to identify how and where these lipids are deposited in tissues throughout the body. In addition to the role of these lipids in triggering and worsening MS, the authors believe that phosphorylated DHCs may have the potential to serve both as new markers of MS disease activity and as new targets for therapeutic intervention.


'/>"/>

Contact: Angela Colmone
acolmone@asip.org
301-634-7953
American Journal of Pathology
Source:Eurekalert

Related biology news :

1. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
2. St. Jude finds factors that accelerate resistance to targeted therapy in lymphoblastic leukemia
3. Human embryonic stem cells remain embryonic because of epigenetic factors
4. Largest study to investigate risk factors of autism to begin enrolling families
5. Stowers Institutes Hawley Lab identifies factors responsible for restart of meiotic cycle
6. NIA uses Genomatix in stem cell research, suggests novel transcription factors for stemness
7. Research examines factors in delaying or declining total knee replacement surgery
8. International team identifies 21 new genetic risk factors for Crohns disease
9. Sociological research shows combined impact of genetics, social factors on delinquency
10. U of T discovers environmental factors linked to sex ratio of plants
11. Advances in the field of schizophrenia research: New genetic factors identified
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/19/2016)... 20, 2016 The new GEZE ... compact web-based "all-in-one" system solution for all door components. ... or the door interface with integration authorization management system, ... systems. The minimal dimensions of the access control and ... building installations offer considerable freedom of design with regard ...
(Date:4/13/2016)... physicians supporting Medicaid patients in Central Florida ... telehealth thanks to a new partnership with higi.   ... can routinely track key health measurements, such as blood ... they opt in, share them with IMPOWER clinicians through ... location at no cost. By leveraging this data, IMPOWER ...
(Date:3/23/2016)... 2016 Einzigartige ... und Stimmerkennung mit Passwörtern     ... MESG ), ein führender Anbieter digitaler Kommunikationsdienste, ... SpeechPro zusammenarbeitet, um erstmals dessen Biometrietechnologie einzusetzen. ... Möglichkeit angeboten, im Rahmen mobiler Apps neben ...
Breaking Biology News(10 mins):
(Date:4/28/2016)... ... April 28, 2016 , ... As part of ... industry experts, and expanding its LATAM network and logistics capabilities. Enhancements have ... manage their clinical trial projects. , The expansion will provide unmatched clinical trial ...
(Date:4/27/2016)... ... April 27, 2016 , ... Most ... devices with fingerprint recognition for secure access, voice recognition for hands-free communication, and ... consumers are interacting with biometrics technology today. But if they asked Joey ...
(Date:4/27/2016)... ... April 27, 2016 , ... PathSensors, Inc., ... Advisory Board. Dr. Lamka will assist PathSensors in expanding the use of the ... deploys the CANARY® test platform for the detection of harmful pathogens, including a ...
(Date:4/27/2016)... , April 27, 2016 ... research report with specific focus on US, EU, ... Japan , to the healthcare business intelligence ... library. Complete report on the Flow ... companies and supported with 282 tables and figures ...
Breaking Biology Technology: