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Sex bias in autoimmunity

Billi, Allison C.a; Kahlenberg, J. Michelleb; Gudjonsson, Johann E.a

Current Opinion in Rheumatology: January 2019 - Volume 31 - Issue 1 - p 53–61
doi: 10.1097/BOR.0000000000000564
MEDICAL PHYSIOLOGY AND RHEUMATIC DISEASES: Edited by Jose U. Scher

Purpose of review To give an overview of recently published articles addressing the mechanisms underlying sex bias in autoimmune disease.

Recent findings Recent studies investigating the origins of sex bias in autoimmune disease have revealed an extensive and interconnected network of genetic, hormonal, microbial, and environmental influences. Investigation of sex hormones has moved beyond profiling the effects of hormones on activity and prevalence of immune cell types to defining the specific immunity-related genes driving these changes. Deeper examination of the genetic content of the X and Y chromosomes and genetic escapees of X chromosome inactivation has revealed some key drivers of female-biased autoimmunity. Animal studies are offering further insights into the connections among microbiota, particularly that of the gut, and the immune system.

Summary Sex bias in autoimmune disease is the manifestation of a complex interplay of the sex chromosomes, sex hormones, the microbiota, and additional environmental and sociological factors.

aDepartment of Dermatology

bDivision of Rheumatology, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA

Correspondence to Johann E. Gudjonsson, MD, PhD, Department of Dermatology, University of Michigan, 6427C Medical Science I, 1301 Catherine, Ann Arbor, MI 48109-5609, USA. Tel: +1 734 615 4508; fax: +1 734 647 0076; e-mail: johanng@med.umich.edu

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