Testex steroid wikipedia

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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.

Syntex submitted its compound to a laboratory in Madison, Wisconsin , for biological evaluation, and found it was the most active, orally-effective progestational hormone of its time. Syntex submitted a patent application in November 1951. In August 1953, . Searle & Co. filed for a patent for the synthesis of the double-bond isomer 13 of norethisterone called noretynodrel. Noretynodrel is converted into norethisterone under acidic conditions, such as those in the human stomach , and the new patent did not infringe on the Syntex patent. Searle obtained approval to market noretynodrel before Syntex received its approval. By 1964 three companies including Syntex were marketing 2-mg doses of the Syntex norethisterone. [ citation needed ]

Testex steroid wikipedia

testex steroid wikipedia