Research Article

Does the Gut Microbiota Influence Immunity and Inflammation in Multiple Sclerosis Pathophysiology?

Table 2

Effect of gut microflora on the immune system in MS.

AuthorsMaterialsModels of diseasesConclusions

Sriram et al. (1999)17 patients with relapsing-remitting MS, 20 patients with progressive MS, and 27 patients with other neurological diseases (OND)MSCNS infections; Chlamydia pneumoniae is a common occurrence in patients with MS. Although Chlamydia pneumoniae may be a pathogenic factor of MS, it may simply be a secondary infection of damaged tissues of the CNS.

Becher et al. (2001)MiceEAECD40-CD154 interactions in the CNS are key determinants for the development and progression of the disease.
No CD40 expression in cells of the CNS reduces the intensity and duration of myelin oligodendrocyte and glycoprotein-induced EAE and reduces the degree of infiltration of inflammatory cells into the CNS.

Oksenberg et al. (2008)MiceEAEEAE is considered a model of autoimmune diseases, including MS.

Ezendam and van Loveren (2008); Ezendam et al. (2008)MiceEAEReduced symptoms in mice infected with Lactobacillus casei Shirota and Bifidobacterium animalis.

Yokote et al. (2008)MiceMSLow-calorie diet alleviates the symptoms of MS.

Hawker et al. (2009)Adults with primary progressive MSMSRituximab monoclonal antibody, selective cell killing CD20, proved effective in reducing disease activity in relapsing-remitting MS.

Lavasani et al. (2009)Mice with the strains of LactobacillusEAEThe administration of probiotic lactic acid has a positive effect on the autoimmune disease by the production of IL-10 and stimulation of Treg cells.

Barnett et al. (2009)Patients with MS and other neurological diseasesMSIgG disrupted myelin in MS.

Ochoa et al. (2010)Mice after treatment with antibiotics and infected with B. fragilisEAEAntibiotic therapy can protect against EAE; a similar effect is observed for B. fragilis (commensal bacteria).

Farooqi et al. (2010)MiceEAEEAE has similar features to inflammation, demyelination, axonal loss, and gliosis.

Lee et al. (2011)MiceEAESFB induce Th17 immune response.

Farrokhi et al. (2013)Patients with and without MS concentration of lipid 624MSLipid 624 (TLR2 ligand) occurs in lower concentrations in patients with MS [12].

Rumah et al. (2013)Patients with MS and healthy individualsMSCSF obtained from two tissues; immunity to ETX is 10 times more frequent in individuals with MS compared to healthy subjects, indicating prior exposure to ETX in MS population.

Chiurchiù et al. (2013)Healthy people and MS patientsMSpDC from patients with MS and production of higher levels of interleukin-12 and interleukin-6, whereas pDC had lower levels of interferon-α compared to healthy subjects.

Tauschmann et al. (2013)Healthy young peopleAutoimmune diseaseThe imbalance between the bacteria and the intestinal immune system leading to overstimulation of the immune system.Treg cells have inhibitory effects on the cells in autoimmune diseases.

Reichelt et al. (2014)Patients with MSMSThe increase of IgA may be secondary to an increase in the intestinal absorption.

Miyake et al. (2015)Patients with MSMSPatients with MS are characterized by moderate dysbiosis. The decrease in the percentage of several Bacteroides, including B. stercoris, B. coprophilus, and B. coprocola.

Nicol et al. (2015)MiceEAEReduction of the severity of symptoms after antibiotic treatment.
Decrease in the amount of IFN-γ, MIP-1a, MIP-1 p, MCP-1, IL-17, and IL-6 and increase in the amount of IL-10 and IL 13.

EAE: experimental autoimmune encephalomyelitis; B. fragilis: Bacteroides fragilis; IL: interleukin; Treg: regulatory T cells; MS: multiple sclerosis; SFB: segmented filamentous bacteria; TLR2: Toll-like receptor 2; IgG: immunoglobulin G; Th17: T helper 17 cell; IFN-γ: interferon-gamma; MIP: macrophage inflammatory proteins; MCP-1: monocyte chemoattractant protein-1; IgA: immunoglobulin A; CSF: cerebrospinal fluid; C. perfringens: Clostridium perfringens; CD 40: cluster of differentiation 40; CD 154: cluster of differentiation 154; CNS: central nervous system; ETX: epsilon-toxin; pDC: proportion of days covered.