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Pregnenolone (P5), or pregn-5-en-3β-ol-20-one, is an endogenous steroid and precursor/metabolic intermediate in the biosynthesis of most of the steroid hormones, including the progestogens, androgens, estrogens, glucocorticoids, and mineralocorticoids. [1]
Pregnenolone, sold under the brand name Enelone among others, is a medication and supplement as well as a naturally occurring and endogenous steroid. [3] [1] [4] [5] [6] It is described as a neurosteroid and anti-inflammatory drug and was used in the treatment of rheumatoid arthritis and soft-tissue rheumatism in the 1950s and is no longer prescribed today, but remains available as a supplement.
1583 13070 Ensembl ENSG00000140459 ENSG00000288362 ENSMUSG00000032323 UniProt P05108 Q9QZ82 RefSeq (mRNA) NM_001099773 NM_000781 NM_019779 NM_001346787 RefSeq (protein) NP_000772 NP_001093243 NP_001333716 NP_062753 Location (UCSC) Chr 15: 74.34 – 74.37 Mb Chr 9: 57.91 – 57.93 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Cholesterol side-chain cleavage enzyme is commonly ...
Pregnanolone, also known as 3α,5β-tetrahydroprogesterone (3α,5β-THP) or as 5β-pregnan-3α-ol-20-one, is a naturally occurring pregnane steroid and a derivative of progesterone.
5α-Pregnan-17α-ol-3,20-dione is produced by 5α-reduction of 17-OHP. The reaction is catalyzed by SRD5A1 [14] and possibly, SRD5A2 enzymes. [7] While the role of the SRD5A1 enzyme in this reaction is well established, it is unclear whether SRD5A2 is also involved. [13]
Comparison of chemical structures for allopregnane, allopregnanolone and 5α-Pregnane-3α,17α-diol-20-one (17α-allopregnanolone). Please note that the difference between the allopregnanolone and 5α-Pregnane-3α,17α-diol-20-one is a hydroxyl function group (−OH) at C17 position.
In the first step in the steroidogenic pathway, cholesterol is converted into pregnenolone, which serves as the precursor to the progestogens progesterone and 17α-hydroxyprogesterone. These progestogens, along with another steroid, 17α-hydroxypregnenolone , are the precursors of all other endogenous steroids, including the androgens ...
Pregnenolone sulfate, also known as pregn-5-en-3β-ol-20-one 3β-sulfate, is a naturally occurring pregnane steroid and a derivative of cholesterol. It is the C3β sulfate ester of pregnenolone. A closely related steroid is dehydroepiandrosterone sulfate (DHEA-S), which is the C3β sulfate ester of dehydroepiandrosterone (DHEA).