Back to Search
Start Over
Negative correlation between testosterone and TNF-α in umbilical cord serum favors a weakened immune milieu in the human male fetoplacental unit.
- Source :
-
The Journal of steroid biochemistry and molecular biology [J Steroid Biochem Mol Biol] 2019 Feb; Vol. 186, pp. 154-160. Date of Electronic Publication: 2018 Oct 22. - Publication Year :
- 2019
-
Abstract
- Clinical and epidemiological evidence supports that pregnancies carrying a male fetus are more vulnerable to infections and preterm birth, probably due to testosterone immunosuppressive properties. In human placentas, testosterone lowers the expression of CYP27B1, the vitamin D (VD)-activating enzyme, diminishing cathelicidin synthesis, a potent VD-dependent antimicrobial peptide (AMP). VD also stimulates other AMPs, including defensins. To get insights into the increased male vulnerability mechanisms, we investigated the relationship between fetal sex and the immunoendocrine milieu at the fetoplacental unit. For this, umbilical vein serum and placental samples were collected from healthy newborns. In males' serum, testosterone levels were significantly higher and negatively associated with TNF-α, a cytokine that strengthens the immune response. Males showed lower serum TNF-α and increased levels and gene expression of the immunosuppressive cytokine IL-10. Only in female samples there was a positive association (P < 0.05) between AMPs and both TNF-α and CYP27B1 and between 25-hydroxyvitamin D <subscript>3</subscript> and IL-1β serum levels. Accordingly, VD-metabolites (25-hydroxyvitamin D <subscript>3</subscript> , calcitriol) significantly stimulated IL-1β gene expression in cultured trophoblasts. Interestingly, IL-1β mRNA correlated positively with defensins (P < 0.05) in males, but not with cathelicidin expression, which was significantly diminished in comparison to females. Our data suggest that high umbilical serum testosterone and IL-10 in males could explain reduced TNF-α levels and lack of association between VD-dependent innate immunity markers and proinflammatory cytokines expression in the fetoplacental unit. Altogether, our observations imply a restricted basal immune milieu in males compared to females, which may help understand the higher male susceptibility to adverse perinatal outcomes.<br /> (Copyright © 2018 Elsevier Ltd. All rights reserved.)
- Subjects :
- Adult
Female
Humans
Immunity, Innate
Infant, Newborn
Interleukin-10 blood
Interleukin-10 immunology
Male
Placenta chemistry
Placenta immunology
Pregnancy
Testosterone immunology
Tumor Necrosis Factor-alpha immunology
Umbilical Cord blood supply
Umbilical Cord immunology
Young Adult
Testosterone blood
Tumor Necrosis Factor-alpha blood
Subjects
Details
- Language :
- English
- ISSN :
- 1879-1220
- Volume :
- 186
- Database :
- MEDLINE
- Journal :
- The Journal of steroid biochemistry and molecular biology
- Publication Type :
- Academic Journal
- Accession number :
- 30359690
- Full Text :
- https://doi.org/10.1016/j.jsbmb.2018.10.009