Testosterone and dihydrotestosterone reduce platelet activation and reactivity in older men and women.

Aging (Albany NY) 2018 05;10(5):902-929

Department of Haemostatic Disorders, Medical University, Lodz, Poland.

The cardiovascular effects of testosterone and dihydrotestosterone are generally attributed to their modulatory action on lipid and glucose metabolism. However, no studies suggest that circulating androgen levels influence the activation and reactivity of blood platelets - one of the main components of the haemostasis system directly involved in atherosclerosis. The levels of testosterone, dihydrotestosterone and oestradiol in plasma from men and women aged from 60 to 65 years were measured by LC-MS; the aim was to identify any potential relationships between sex steroid levels and the markers of platelet activation (surface membrane expression of GPII/IIIa complex and P-selectin) and platelet reactivity in response to arachidonate, collagen or ADP, monitored with whole blood aggregometry and flow cytometry. The results of the part of the study indicate that the concentrations of testosterone and its reduced form, dihydrotestosterone are significantly negatively associated with platelet activation and reactivity. These observations were confirmed in an model: testosterone and dihydrotestosterone significantly inhibited platelet aggregation triggered by arachidonate or collagen. Our findings indicate that testosterone and dihydrotestosterone are significant haemostatic steroids with inhibitory action on blood platelets in older people.

Download full-text PDF

Source
http://dx.doi.org/10.18632/aging.101438DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5990384PMC
May 2018

Publication Analysis

Top Keywords

testosterone dihydrotestosterone
20
platelet activation
12
activation reactivity
12
men women
8
blood platelets
8
arachidonate collagen
8
testosterone
6
platelet
5
dihydrotestosterone
5
confirmed model
4
model testosterone
4
adp monitored
4
aged years
4
monitored blood
4
women aged
4
observations confirmed
4
measured lc-ms
4
aim identify
4
lc-ms aim
4
years measured
4

Similar Publications