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Testosterone metabolism in the human endometrium: A combination of metabolic (mass spectrometry) and enzyme expression (RT-PCR). / Angela Elizabeth Taylor

Swansea University Author: Angela Elizabeth Taylor

Abstract

Localised steroid metabolism is important in proliferative disorders of theendometrium. The metabolism of testosterone, an important precursor inendometrial disorders, was investigated by mass spectrometry and RT-PCR (real­time polymerase chain reaction), allowing determination of steroid metabolite...

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Published: 2009
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa43059
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spelling 2018-08-29T15:18:50.1749443 v2 43059 2018-08-02 Testosterone metabolism in the human endometrium: A combination of metabolic (mass spectrometry) and enzyme expression (RT-PCR). 8ec68cfd8d338ddfec4d104eb65901ad NULL Angela Elizabeth Taylor Angela Elizabeth Taylor true true 2018-08-02 Localised steroid metabolism is important in proliferative disorders of theendometrium. The metabolism of testosterone, an important precursor inendometrial disorders, was investigated by mass spectrometry and RT-PCR (real­time polymerase chain reaction), allowing determination of steroid metabolites andexpression of steroid converting enzymes; aromatase, 17P-HSD1, 2, 4, 5, 7, 8,(hydroxysteroid dehydrogenase) and 5AR1, 2 (alpha reductase). Samples werederived from cell lines (Ishikawa, HEC-1A, HEC-1B, RL95-2, COV434), andbiopsies; fertile, endometriosis, poly-cystic ovary syndrome (PCOS), endometrialhyperplasia, unexplained infertility, endometrial polyp.Optimum mass spectrometry techniques, determined using steroid standards, wereLC/MS for androgens and LC/MS/MS for oestrogens, following dansyl-chloridederivatisation. GC/MS was less sensitive.The route of testosterone metabolism varied in the cell lines and clinical biopsies, themajor metabolite was correlated with high expression of 5AR1 or 17p-HSD2, 4 and8. If DHT (dihydrotestosterone) was produced high basal expression of 5AR1 wasobserved and if androstenedione was produced high basal expression of HSD2, 4 or8 was observed. A mixture of DHT and androstenedione was correlated withexpression of 5AR1 and 17P-HSD2, 4 or HSD8.Changes in enzyme expression were correlated with changes in steroid concentrationafter testosterone treatment, as follows:1. Increased 5AR1 expression was correlated with increased DHT concentrationin Ishikawa, HEC-1B, COV434, PCOS, endometriosis, stromal hyperplasiaand ovarian cyst biopsies.2. Increased expression of 5AR2 was correlated with increased androsteroneconcentration in fertile and unexplained infertility biopsies.3. Increased 17p-HSD5 expression was correlated with increased testosteroneconcentration in HEC-1A cells.4. Increased aromatase expression was correlated to increased oestradiol andoestrone concentrations in a hyperplasia biopsy.Analysis of a range of enzymes and steroids produced testosterone metabolism mapsof the endometrium (and associated disorders) highlighting steroids which couldcontribute to endometrial disorders and viable enzyme target(s) for inhibition (5AR1,17P-HSD2, 4, 8). E-Thesis Steroid metabolism 31 12 2009 2009-12-31 COLLEGE NANME Swansea University Medical School COLLEGE CODE Swansea University Doctoral Ph.D 2018-08-29T15:18:50.1749443 2018-08-02T16:24:31.1942063 Faculty of Medicine, Health and Life Sciences Swansea University Medical School - Medicine Angela Elizabeth Taylor NULL 1 0043059-02082018162543.pdf 10821451.pdf 2018-08-02T16:25:43.4230000 Output 44884172 application/pdf E-Thesis true 2018-08-02T16:25:43.4230000 false
title Testosterone metabolism in the human endometrium: A combination of metabolic (mass spectrometry) and enzyme expression (RT-PCR).
spellingShingle Testosterone metabolism in the human endometrium: A combination of metabolic (mass spectrometry) and enzyme expression (RT-PCR).
Angela Elizabeth Taylor
title_short Testosterone metabolism in the human endometrium: A combination of metabolic (mass spectrometry) and enzyme expression (RT-PCR).
title_full Testosterone metabolism in the human endometrium: A combination of metabolic (mass spectrometry) and enzyme expression (RT-PCR).
title_fullStr Testosterone metabolism in the human endometrium: A combination of metabolic (mass spectrometry) and enzyme expression (RT-PCR).
title_full_unstemmed Testosterone metabolism in the human endometrium: A combination of metabolic (mass spectrometry) and enzyme expression (RT-PCR).
title_sort Testosterone metabolism in the human endometrium: A combination of metabolic (mass spectrometry) and enzyme expression (RT-PCR).
author_id_str_mv 8ec68cfd8d338ddfec4d104eb65901ad
author_id_fullname_str_mv 8ec68cfd8d338ddfec4d104eb65901ad_***_Angela Elizabeth Taylor
author Angela Elizabeth Taylor
author2 Angela Elizabeth Taylor
format E-Thesis
publishDate 2009
institution Swansea University
college_str Faculty of Medicine, Health and Life Sciences
hierarchytype
hierarchy_top_id facultyofmedicinehealthandlifesciences
hierarchy_top_title Faculty of Medicine, Health and Life Sciences
hierarchy_parent_id facultyofmedicinehealthandlifesciences
hierarchy_parent_title Faculty of Medicine, Health and Life Sciences
department_str Swansea University Medical School - Medicine{{{_:::_}}}Faculty of Medicine, Health and Life Sciences{{{_:::_}}}Swansea University Medical School - Medicine
document_store_str 1
active_str 0
description Localised steroid metabolism is important in proliferative disorders of theendometrium. The metabolism of testosterone, an important precursor inendometrial disorders, was investigated by mass spectrometry and RT-PCR (real­time polymerase chain reaction), allowing determination of steroid metabolites andexpression of steroid converting enzymes; aromatase, 17P-HSD1, 2, 4, 5, 7, 8,(hydroxysteroid dehydrogenase) and 5AR1, 2 (alpha reductase). Samples werederived from cell lines (Ishikawa, HEC-1A, HEC-1B, RL95-2, COV434), andbiopsies; fertile, endometriosis, poly-cystic ovary syndrome (PCOS), endometrialhyperplasia, unexplained infertility, endometrial polyp.Optimum mass spectrometry techniques, determined using steroid standards, wereLC/MS for androgens and LC/MS/MS for oestrogens, following dansyl-chloridederivatisation. GC/MS was less sensitive.The route of testosterone metabolism varied in the cell lines and clinical biopsies, themajor metabolite was correlated with high expression of 5AR1 or 17p-HSD2, 4 and8. If DHT (dihydrotestosterone) was produced high basal expression of 5AR1 wasobserved and if androstenedione was produced high basal expression of HSD2, 4 or8 was observed. A mixture of DHT and androstenedione was correlated withexpression of 5AR1 and 17P-HSD2, 4 or HSD8.Changes in enzyme expression were correlated with changes in steroid concentrationafter testosterone treatment, as follows:1. Increased 5AR1 expression was correlated with increased DHT concentrationin Ishikawa, HEC-1B, COV434, PCOS, endometriosis, stromal hyperplasiaand ovarian cyst biopsies.2. Increased expression of 5AR2 was correlated with increased androsteroneconcentration in fertile and unexplained infertility biopsies.3. Increased 17p-HSD5 expression was correlated with increased testosteroneconcentration in HEC-1A cells.4. Increased aromatase expression was correlated to increased oestradiol andoestrone concentrations in a hyperplasia biopsy.Analysis of a range of enzymes and steroids produced testosterone metabolism mapsof the endometrium (and associated disorders) highlighting steroids which couldcontribute to endometrial disorders and viable enzyme target(s) for inhibition (5AR1,17P-HSD2, 4, 8).
published_date 2009-12-31T03:54:10Z
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score 11.01297

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