Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0338671 (Steroids)
 9,479 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Guinea pig adrenal estrogen sulfotransferase from either sex was eluted as a single peak, irrespective of buffer salt concentration, when subjected to fast protein liquid chromatography on gel filtration columns. The same enzyme was consistently eluted in two distinct peaks during chromatofocusing. Adrenal pregnenolone sulfotransferase was eluted during gel filtration in a heterogeneous pattern, dependent on salt concentration. These properties have made possible almost complete separation of the two sulfotransferases in one step, although adrenal estrogen sulfotransferase may possess a minute intrinsic ability to catalyze sulfation of pregnenolone. Pregnenolone sulfotransferase had no measurable activity toward estrone. Pregnenolone sulfotransferase from both sexes yielded variable elution patterns during chromatofocusing. Estrogen sulfotransferase from the adrenal, as well as that of guinea pig chorion, was strongly inhibited by N-ethylmaleimide and to a lesser degree by iodoacetamide and iodoacetate. Adrenal and chorion estrogen sulfotransferases were thermolabile and were activated, although not protected from the effect of heat, by binding to 3'-phosphoadenosine 5'-phosphosulfate. Adrenal pregnenolone sulfotransferase was inhibited only by high concentrations of N-ethylmaleimide and not at all by iodoacetamide or iodoacetate. It was more thermostable than the estrogen sulfotransferase and was not activated by binding to 3'-phosphoadenosine 5'-phosphosulfate.
Steroids 1992 Jun
PMID:Comparison of estrogen sulfotransferase and pregnenolone sulfotransferase of guinea pig. 144 Jul

Estrogen receptor (ER) levels, formation of 3'-phosphoadenosine-5'phosphosulfate (PAPS), and sulfate transfer to estradiol-178, have been determined in 62 human primary carcinoma cytosol preparations. Whilst no differences between ER positive and ER negative tumors were found in the synthesis of [35S]PAPS, formation of estradiol-3-[35S]sulfate catalysed by estrogen sulfotransferase was significantly higher in ER positive tumors [84 +/- 10 (mean +/- S.E.M.) versus 32 +/- 9 pmole estradiol-3-sulfate per mg protein per 2 hr for ER positive and ER negative tumors, respectively, p less than 0.02]. By choosing a discriminating value for estrogen sulfurylation of 40 pmole per mg protein per 2 hr, then 16/19 (84%) of the ER negative tumors were below this point. Since previous data had shown that 20/23 (87%) progesterone receptor negative tumors were also below this value (Pewnim, Adams and Ho, CANCER RES. 40, 1360 (1980), an alternative simple method, having a high potential for the evaluation of hormone responsiveness in mammary cancer, is suggested.
Steroids 1982 Jan
PMID:Estrogen sulfurylation as an alternative indicator of hormone dependence in human breast cancer. 695 16

The giant freshwater prawn, Macrobrachium rosenbergii, is important to many Asian countries due to its high economic value as an aquaculture product. With demand increasing, there is requirement for a better understanding of the biosynthetic components that regulate its growth and reproduction, including steroids, in order to help increase production. Vertebrate-type steroids and their receptors were identified in crustaceans and implicated in reproduction. In this study, we presented the sex steroids estradiol and progesterone by LC-MS/MS in female M. rosenbergii, and reveal steroidogenic-related genes by in silico analysis of de novo assembled transcriptomes. Comparative analysis with other species was performed to confirm their putative role, as well as tissue-specific and quantitative gene expression. We reveal 29 transcripts that encode for steroidogenic-related proteins, including steroidogenic enzymes, a nuclear steroid hormone receptors, and a steroidogenic factor. Moreover, we identified for the first time the presence of steroidogenic factor 1, StAR-related lipid transfer protein, estradiol receptor- and progesterone-like protein in M. rosenbergii. Those targeted for gene expression analysis (3 beta-hydroxysteroid dehydrogenase, 17 beta-hydroxysteroid dehydrogenase, estrogen sulfotransferase and progesterone receptor-like) showed widespread expression within many tissues, and at relatively high levels in the central nervous system (CNS) during ovarian maturation. In summary, we provide further evidence for the existence of steroidogenic pathways in crustaceans, which may be useful for advancing prawn aquaculture.
Steroids 2016 Mar
PMID:Steroids and genes related to steroid biosynthesis in the female giant freshwater prawn, Macrobrachium rosenbergii. 2677 30