The relationship between circulating testosterone and inflammatory cytokines in men

Testosterone is the predominant gonadal androgen in men. Low testosterone levels are found to be associated with an increased in metabolic risk and systematic inflammation. Since adipose tissue is a source of inflammatory cytokines, testosterone may regulate inflammation by acting on adipose tissue. This review aimed to explore the role of testosterone in inflammation and its mechanism of action. Both animal studies and human studies showed that (1) testosterone deficiency was associated with an increase in pro-inflammatory cytokines; (2) testosterone substitution reduced pro-inflammatory cytokines. The suppression of inflammation by testosterone were observed in patients with coronary artery disease, prostate cancer and diabetes mellitus through the increase in anti-inflammatory cytokines (IL-10) and the decrease in pro-inflammatory cytokines (IL-1β, IL-6, and TNF-α). Despite these, some studies also reported a non-significant relationship. In conclusion, testosterone may possess anti-inflammatory properties but its magnitude is debatable. More evidence is needed to validate the use of testosterone as a marker and in the management of chronic inflammatory diseases.

The aging male : the official journal of the International Society for the Study of the Aging Male. 2018 Jun 21 [Epub ahead of print]

Nur-Vaizura Mohamad, Sok Kuan Wong, Wan Nuraini Wan Hasan, James Jam Jolly, Mohd Fozi Nur-Farhana, Soelaiman Ima-Nirwana, Kok-Yong Chin

a Department of Pharmacology , Universiti Kebangsaan Malaysia Medical Centre , Kuala Lumpur , Malaysia.