Prostate concentrations of endogenous androgens by radioimmunoassay
| ISSN: |
0022-4731
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|---|---|
| Source: |
Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
|
| Topics: |
Biology
Chemistry and Pharmacology
|
| Type of Medium: |
Electronic Resource
|
| URL: |
| _version_ | 1798291103104892928 |
|---|---|
| autor | Albert, J. Geller, J. Geller, S. Lopez, D. |
| autorsonst | Albert, J. Geller, J. Geller, S. Lopez, D. |
| book_url | http://linkinghub.elsevier.com/retrieve/pii/0022-4731(76)90131-X |
| datenlieferant | nat_lic_papers |
| fussnote | A method for simultaneously determining concentrations of major androgens in prostate has been developed. Extraction techniques used to isolate the androgens from minced tissue include homogenization with high-speed blades in Delsal's solvent mixture, adsorption to silica gel, followed by column and one thin-layer chromatography (t.l.c.). Radioimmunoassays (RIA) of small aliquots of t.l.c. eluates are used to quantitate picogram amounts of 5α-dihydrotestosterone (DHT) and 5α-androstanediols (Diol) and to estimate testosterone (T) and androstenedione (Ad). Contamination of blanks was reduced to RIA sensitivity limits primarily by treatment of glassware in a self-cleaning oven. The specificity of the method for each androgen was established by t.l.c. separations of known prostate metabolites, antisera specificities, and parallelism of sample aliquots to androgen RIA standards. The overall precision, in terms of coefficients of variation, was 21% for DHT and 24% for Diol. T and Ad could not be measured with acceptable precision because their very low concentrations in prostate (=〈0.5 ng/g tissue) were less than RIA sensitivity limits. Accuracy studies indicated recoveries ranging from 96% for Diol to 121% for DHT. In human benign hypertrophie prostate tissue, DHT averaged 153 ng/g soluble protein (5.8 ng/g tissue) which was 17 times higher than values obtained in human spleen and kidney; Diol in prostate showed no consistent differences from values noted in kidney or spleen. |
| hauptsatz | hsatz_simple |
| identnr | NLZ186333536 |
| issn | 0022-4731 |
| journal_name | Journal of Steroid Biochemistry |
| materialart | 1 |
| package_name | Elsevier |
| publikationsort | Amsterdam |
| publisher | Elsevier |
| reference | 7 (1976), S. 301-307 |
| search_space | articles |
| shingle_author_1 | Albert, J. Geller, J. Geller, S. Lopez, D. |
| shingle_author_2 | Albert, J. Geller, J. Geller, S. Lopez, D. |
| shingle_author_3 | Albert, J. Geller, J. Geller, S. Lopez, D. |
| shingle_author_4 | Albert, J. Geller, J. Geller, S. Lopez, D. |
| shingle_catch_all_1 | Albert, J. Geller, J. Geller, S. Lopez, D. Prostate concentrations of endogenous androgens by radioimmunoassay 0022-4731 00224731 Elsevier |
| shingle_catch_all_2 | Albert, J. Geller, J. Geller, S. Lopez, D. Prostate concentrations of endogenous androgens by radioimmunoassay 0022-4731 00224731 Elsevier |
| shingle_catch_all_3 | Albert, J. Geller, J. Geller, S. Lopez, D. Prostate concentrations of endogenous androgens by radioimmunoassay 0022-4731 00224731 Elsevier |
| shingle_catch_all_4 | Albert, J. Geller, J. Geller, S. Lopez, D. Prostate concentrations of endogenous androgens by radioimmunoassay 0022-4731 00224731 Elsevier |
| shingle_title_1 | Prostate concentrations of endogenous androgens by radioimmunoassay |
| shingle_title_2 | Prostate concentrations of endogenous androgens by radioimmunoassay |
| shingle_title_3 | Prostate concentrations of endogenous androgens by radioimmunoassay |
| shingle_title_4 | Prostate concentrations of endogenous androgens by radioimmunoassay |
| sigel_instance_filter | dkfz geomar wilbert ipn albert fhp |
| source_archive | Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 |
| timestamp | 2024-05-06T08:27:18.115Z |
| titel | Prostate concentrations of endogenous androgens by radioimmunoassay |
| titel_suche | Prostate concentrations of endogenous androgens by radioimmunoassay A method for simultaneously determining concentrations of major androgens in prostate has been developed. Extraction techniques used to isolate the androgens from minced tissue include homogenization with high-speed blades in Delsal's solvent mixture, adsorption to silica gel, followed by column and one thin-layer chromatography (t.l.c.). Radioimmunoassays (RIA) of small aliquots of t.l.c. eluates are used to quantitate picogram amounts of 5α-dihydrotestosterone (DHT) and 5α-androstanediols (Diol) and to estimate testosterone (T) and androstenedione (Ad). Contamination of blanks was reduced to RIA sensitivity limits primarily by treatment of glassware in a self-cleaning oven. The specificity of the method for each androgen was established by t.l.c. separations of known prostate metabolites, antisera specificities, and parallelism of sample aliquots to androgen RIA standards. The overall precision, in terms of coefficients of variation, was 21% for DHT and 24% for Diol. T and Ad could not be measured with acceptable precision because their very low concentrations in prostate (=〈0.5 ng/g tissue) were less than RIA sensitivity limits. Accuracy studies indicated recoveries ranging from 96% for Diol to 121% for DHT. In human benign hypertrophie prostate tissue, DHT averaged 153 ng/g soluble protein (5.8 ng/g tissue) which was 17 times higher than values obtained in human spleen and kidney; Diol in prostate showed no consistent differences from values noted in kidney or spleen. |
| topic | W V |
| uid | nat_lic_papers_NLZ186333536 |