99% Purity Testosterone Propionate Crystalline CAS 57-85-2 C22H32O3

The administration of testosterone propionate can induce production of proteins related to male sexual development.7 On the other hand, testosterone itself present an estrogenic activity due to interaction with aromatase enzyme, thus the continuous aministration of testosterone propionate may cause the elevation of plasma estrogen.6 Clinical trials showed as well, a decrease in plasma LH after testosterone propionate administration.1

The effects of testosterone in humans and other vertebrates occur by way of two main mechanisms: by activation of the androgen receptor (directly or as DHT), and by conversion to estradiol and activation of certain estrogen receptors. Free testosterone (T) is transported into the cytoplasm of target tissue cells, where it can bind to the androgen receptor, or can be reduced to 5alpha-dihydrotestosterone (DHT) by the cytoplasmic enzyme 5alpha-reductase. The areas of binding are called hormone response elements (HREs), and influence transcriptional activity of certain genes, producing the androgen effects.