Androgen backdoor pathway

Androgen backdoor pathway

Androgen backdoor pathway is a biochemical pathway that leads to the production of androgens, a type of hormone that plays a key role in male traits and reproductive activity. This pathway is termed "backdoor" because it bypasses the conventional route of androgen synthesis.

Biochemistry

The androgen backdoor pathway involves several enzymatic reactions. It begins with the conversion of cholesterol into pregnenolone by the enzyme P450scc. Pregnenolone is then converted into progesterone by 3β-Hydroxysteroid dehydrogenase (3β-HSD). The pathway then diverges from the conventional route, bypassing the production of dehydroepiandrosterone (DHEA) and instead converting progesterone into 5α-dihydroprogesterone (5α-DHP) by 5α-reductase. 5α-DHP is then converted into androstanediol by 3α-Hydroxysteroid dehydrogenase (3α-HSD), and finally into dihydrotestosterone (DHT) by 17β-Hydroxysteroid dehydrogenase (17β-HSD).

Clinical significance

The androgen backdoor pathway has been implicated in a number of medical conditions. For example, it has been suggested that this pathway may play a role in the development of prostate cancer, as DHT is a potent androgen that can stimulate the growth of prostate cells. In addition, mutations in the enzymes involved in this pathway can lead to disorders of sex development (DSDs), such as 5α-reductase deficiency and 17β-HSD deficiency.

See also

• Androgen
• Steroidogenesis
• 5α-reductase
• 17β-Hydroxysteroid dehydrogenase