Hi Cort,
although there is evidence that the risk of MS symptoms worsening is greater after acute viral illnesses
And don't forget the studies about the gut involvement in MS.
From another thread:
Prevalence of Celiac Disease in Multiple Sclerosis
Luis Rodrigo , Carlos Hernandez-Lahoz , Dolores Fuentes , Noemi Alvarez , Antonio Lopez-Vazquez and Segundo Gonzalez
BMC Neurology 2011, 11:31doi:10.1186/1471-2377-11-31
Published: 7 March 2011
Abstract (provisional)
Background
Celiac disease (CD) is a common systemic disease related to a permanent intolerance to gluten and is often associated with different autoimmune and neurological diseases. Its mean prevalence in the general population is 1-2% worldwide. Our aim was to study the prevalence of celiac disease in a prospective series of Multiple Sclerosis (MS) patients and their first-degree relatives.
Methods
We analyzed the prevalence of serological, histological and genetic CD markers in a series of 72 MS patients and in their 126 first-degree relatives, compared to 123 healthy controls.
Results
Tissue IgA-anti-transglutaminase-2 antibodies were positive in 7 MS patients (10%), compared to 3 healthy controls (2.4%) (p<0.05). OR: 5.33 (CI-95%: 1.074-26.425). No differences were found in HLA-DQ2 markers between MS patients (29%) and controls (26%) (NS). We detected mild or moderate villous atrophy (Marsh III type) in duodenal biopsies, in 8 MS patients (11.1%). We also found a high proportion of CD among first-degree relatives: 23/126 (32%). Several associated diseases were detected, mainly dermatitis 41 (57%) and iron deficiency anemia in 28 (39%) MS patients. We also found in them, an increased frequency of circulating auto-antibodies such as anti-TPO in 19 (26%), ANA in 11 (15%) and AMA in 2 (3%).
Conclusions
We have found an increased prevalence of CD in 8 of the 72 MS patients (11.1%) and also in their first-degree relatives (23/126 [32%]). Therefore, increased efforts aimed at the early detection and dietary treatment of CD, among antibody-positive MS patients, are advisable.
Medscape article:
http://www.medscape.com/viewarticle/738740
And this one:
Proinflammatory T-cell responses to gut microbiota promote experimental autoimmune encephalomyelitis
Yun Kyung Leea,1, Juscilene S. Menezesa,1, Yoshinori Umesakib, and Sarkis K. Mazmaniana,2
+ Author Affiliations
aDivision of Biology, California Institute of Technology, Pasadena, CA 91125; and
bYakult Central Institute for Microbiological Research, Tokyo 186-8650, Japan
Edited by Jeffrey I. Gordon, Washington University School of Medicine, St. Louis, MO, and approved June 23, 2010 (received for review January 19, 2010)
Abstract
Although the effects of commensal bacteria on intestinal immune development seem to be profound, it remains speculative whether the gut microbiota influences extraintestinal biological functions. Multiple sclerosis (MS) is a devastating autoimmune disease leading to progressive deterioration of neurological function. Although the cause of MS is unknown, microorganisms seem to be important for the onset and/or progression of disease. However, it is unclear how microbial colonization, either symbiotic or infectious, affects autoimmunity. Herein, we investigate a role for the microbiota during the induction of experimental autoimmune encephalomyelitis (EAE), an animal model for MS. Mice maintained under germ-free conditions develop significantly attenuated EAE compared with conventionally colonized mice. Germ-free animals, induced for EAE, produce lower levels of the proinflammatory cytokines IFN-γ and IL-17A in both the intestine and spinal cord but display a reciprocal increase in CD4+CD25+Foxp3+ regulatory T cells (Tregs). Mechanistically, we show that gut dendritic cells from germ-free animals are reduced in the ability to stimulate proinflammatory T cell responses. Intestinal colonization with segmented filamentous bacteria (SFB) is known to promote IL-17 production in the gut; here, we show that SFBs also induced IL-17Aproducing CD4+ T cells (Th17) in the CNS. Remarkably, germ-free animals harboring SFBs alone developed EAE, showing that gut bacteria can affect neurologic inflammation. These findings reveal that the intestinal microbiota profoundly impacts the balance between pro- and antiinflammatory immune responses during EAE and suggest that modulation of gut bacteria may provide therapeutic targets for extraintestinal inflammatory diseases such as MS.
Glynis x