Radioimmunoassay of 8-arginine-vasopressin (antidiuretic hormone) in human plasma
- 1 December 1978
- journal article
- research article
- Published by Taylor & Francis in Scandinavian Journal of Clinical and Laboratory Investigation
- Vol. 38 (8) , 707-716
- https://doi.org/10.3109/00365517809104877
Abstract
A radioimmunoassay for 8-arginine-vasopressin (AVP) measurement in human plasma has been developed and evaluated, using a commercial preparation of an antibody to AVP. Detection limit of the assay was 0.4 pg. A simple acetone extraction procedure gave a recovery of 65% of added [125I]AVP. The overall sensitivity in the assay was 1.0 pg/ml when 2 ml plasma samples were extracted. The antigenic sites of the employed antibody seemed to be a combination of amino acid residues in the tripeptide tail and the pentapeptide ring. This can explain that the antibody was almost completely insensitive to chemically or enzymatically degraded AVP. The inter-assay coefficient of variation for the control plasma pools averaged 17%. A good correlation to plasma osmolalities above 290 has been found. AVP level in recumbent subjects (n = 8) with plasma osmolalities in the normal range was 2.8 ± 1.0 pg/ml (mean ± SD) and in ambulatory subjects (n = 10) on ad lib. water intake 4.5 ± 1.9 pg/ml (mean ± SD).Keywords
This publication has 0 references indexed in Scilit: