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Ingested (oral) thyrotropin releasing factor (TRH) inhibits EAE. Cytokine 2013 Jan;61(1):323-8



Pubmed ID




Scopus ID

2-s2.0-84869865496   3 Citations


BACKGROUND: Ingested immunoactive proteins type I IFN, SIRS peptide 1-21, I?-MSH, ACTH, SST inhibit clinical attacks and inflammation in acute EAE by decreasing Th1-like cytokines, increasing Th2-like cytokines or increasing T(reg) cell frequencies.

OBJECTIVE: We examined whether another protein, thyrotropin releasing factor (TRH), would have similar anti-inflammatory effects in EAE after oral administration.

DESIGN/METHODS: B6 mice were immunized with MOG peptide 35-55 and gavaged with control saline or TRH during ongoing disease. Splenocytes from mock fed or TRH fed mice were adoptively transferred into active MOG peptide 35-55 immunized recipient mice during ongoing disease.

RESULTS: Ingested (oral) TRH inhibited ongoing disease and decreased inflammation. Adoptively transferred cells from TRH fed donors protected against actively induced disease and decreased inflammation. In actively fed mice, oral TRH decreased IL-17 and TNF-I? cytokines in both the spleen and the CNS. In recipients of donor cells from TRH fed mice there was a reduction of Th1 and Th17 and induction of Th2-like IL-13 cytokines in both the spleen and CNS. Oral TRH decreased clinical score and decreased inflammatory foci in both actively fed and recipients of actively fed mice. There was no significant increase in T(reg) cell frequencies in actively fed or recipients of TRH fed donor cells.

CONCLUSIONS: Ingested (orally administered) TRH can inhibit clinical disease, inhibit CNS inflammation by decreasing Th1-like, Th17 and TNF-I? cytokines and increasing Th2-like cytokines (IL-13) in the CNS.

Author List

Brod SA, Bauer V


Staley A. Brod MD Professor in the Neurology department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Administration, Oral
Adoptive Transfer
Anti-Inflammatory Agents
Central Nervous System
Encephalomyelitis, Autoimmune, Experimental
Mice, Inbred C57BL
Myelin-Oligodendrocyte Glycoprotein
Peptide Fragments
Th1 Cells
Th17 Cells
Thyrotropin-Releasing Hormone
Tumor Necrosis Factor-alpha