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Clinical Trial
. 2003 Dec 1;171(11):6267-74.
doi: 10.4049/jimmunol.171.11.6267.

Immune modulation in multiple sclerosis patients treated with the pregnancy hormone estriol

Samantha S Soldan  1 , Ana Isabel Alvarez Retuerto, Nancy L Sicotte, Rhonda R Voskuhl
Affiliations
Clinical Trial

Immune modulation in multiple sclerosis patients treated with the pregnancy hormone estriol

Samantha S Soldan et al. J Immunol. .

Abstract

The protective effect of pregnancy on putative Th1-mediated autoimmune diseases, such as multiple sclerosis and rheumatoid arthritis, is associated with a Th1 to Th2 immune shift during pregnancy. The hormone estriol increases during pregnancy and has been shown to ameliorate experimental autoimmune encephalomyelitis and collagen-induced arthritis. In addition, estrogens induce cytokine changes consistent with a Th1 to Th2 shift when administered in vitro to human immune cells and in vivo to mice. In a pilot trial, oral estriol treatment of relapsing remitting multiple sclerosis patients caused significant decreases in enhancing lesions on brain magnetic resonance imaging. Here, the immunomodulatory effects of oral estriol therapy were assessed. PBMCs collected longitudinally during the trial were stimulated with mitogens, recall Ags, and glatiramer acetate. Cytokine profiles of stimulated PBMCs were determined by intracellular cytokine staining (IL-5, IL-10, IL-12 p40, TNF-alpha, and IFN-gamma) and cytometric bead array (IL-2, IL-4, IL-5, IL-10, TNF-alpha, and IFN-gamma). Significantly increased levels of IL-5 and IL-10 and decreased TNF-alpha were observed in stimulated PBMC isolated during estriol treatment. These changes in cytokines correlated with reductions of enhancing lesions on magnetic resonance imaging in relapsing remitting multiple sclerosis. The increase in IL-5 was primarily due to an increase in CD4(+) and CD8(+) T cells, the increase in IL-10 was primarily due to an increase in CD64(+) monocytes/macrophages with some effect in T cells, while the decrease in TNF-alpha was primarily due to a decrease in CD8(+) T cells. Further study of oral estriol therapy is warranted in Th1-mediated autoimmune diseases with known improvement during pregnancy.

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