DIHYDROTESTOSTERONE IN HUMAN SPERMATIC VENOUS PLASMA

1974 ◽  
Vol 76 (2) ◽  
pp. 388-391 ◽  
Author(s):  
M. Pazzagli ◽  
D. Borrelli ◽  
G. Forti ◽  
M. Serio
Keyword(s):  
Protein Binding ◽  
Binding Assay ◽  
Venous Blood ◽  
Spermatic Vein ◽  
Human Testis ◽  
Peripheral Venous Blood ◽  
Protein Binding Assay ◽  
Competitive Protein Binding Assay ◽  
Competitive Protein Binding ◽  
Venous Plasma

ABSTRACT Testosterone (T) and 5α-dihydrotestosterone (DHT) concentrations in spermatic and peripheral venous blood obtained from six men have been measured by radioimmunoassay and competitive protein binding assay respectively. The concentrations (mean ± sd) of DHT in the spermatic vein (0.64 ± 0.33 μg/100 ml) were higher than that found in the cubital vein (0.025 ± 0.01 μg/100 ml). These results demonstrate the production of DHT by the human testis.

A Simplified competitive protein-binding assay for 25-hydroxycalciferol

1976 ◽  
Vol 68 (2) ◽  
pp. 99-105 ◽  
Author(s):  
B. Garcia-Pascual ◽  
A. Peytremann ◽  
B. Courvoisier ◽  
D.E.M. Lawson
Keyword(s):  
Protein Binding ◽  
Binding Assay ◽  
Protein Binding Assay ◽  
Competitive Protein Binding Assay ◽  
Competitive Protein Binding

A Competitive Protein-Binding Assay for 25-Hydroxycholecalciferol

1975 ◽  
Vol 17 (2) ◽  
pp. 57-57
Author(s):  
Yoshiki Seino ◽  
Tsunesuke Shimotsuji ◽  
Shintaro Okada ◽  
Teisuke Hiejima ◽  
Chiiko Ikehara ◽  
...  
Keyword(s):  
Protein Binding ◽  
Binding Assay ◽  
Protein Binding Assay ◽  
Competitive Protein Binding Assay ◽  
Competitive Protein Binding ◽  
25 Hydroxycholecalciferol

Competitive Protein-Binding Assay for 25-Hydroxycholecalciferol

1974 ◽  
Vol 46 (2) ◽  
pp. 231-240 ◽  
Author(s):  
S. Edelstein ◽  
M. Charman ◽  
D. E. M. Lawson ◽  
E. Kodicek
Keyword(s):  
Protein Binding ◽  
Binding Assay ◽  
Rat Serum ◽  
Male And Female ◽  
Normal Volunteers ◽  
Protein Binding Assay ◽  
Competitive Protein Binding Assay ◽  
Competitive Protein Binding ◽  
The Mean ◽  
25 Hydroxycholecalciferol

1. A competitive protein-binding assay for plasma 25-hydroxycholecalciferol was developed, using Sephadex LH-20 columns for the isolation of the sterol and a partially purified protein from rat serum as the binding protein. 2. The mean plasma 25-hydroxycholecalciferol in eighteen male and female normal volunteers was 38 ± SD 14 pmol/ml (15–2 ± 5–6 ng/ml). 3. Levels of 25-hydroxycholecalciferol in plasma of four male volunteers maintained for 2 months on a diet supplemented with 26·1 nmol (10 μg) of cholecalciferol a day were found to be significantly higher. 4. High correlation was established between plasma 25-hydroxycholecalciferol values obtained by the competitive protein-binding assay and values obtained by bioassay.

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