Search PubMed⌕ Search

Biomedical subjects

N A THORN

Publications and source records attributed to N A THORN.

At least 37 records · Page 2Linked to original sources
PubMed1957

Chemical form of circulating antidiuretic hormone in rats.

Serum, taken from rats under ether anesthesia after injection of hypertonic saline, contained antidiuretic activity in a concentration equivalent to 1 to 3 millipressor units of pitressin per ml. The active material was retained by a collodion ultrafilter and, on electrophoretic analysis, moved with the beta globulins. Dialysis against 0.2 N acetic acid appeared to dissociate the complex. The antidiuretic factor was found in serum after stimuli known to cause release of pituitary antidiuretic hormone. Inactivation by thioglycolic acid and by proteolytic enzymes paralleled the inactivation of standard pitressin. Control experiments made it unlikely that serotonin, or any other substance released in the clotting of blood, could have contributed to the antidiuretic action. For these reasons it was concluded that the factor studied was native pituitary antidiuretic hormone circulating as a definite protein-peptide complex.

Animals↗
PubMed1957

A densimetric method for assay of small amounts of antidiuretic hormone.

A sensitive and reproducible method for assay of antidiuretic activity, described in this paper, yielded accurate measurements in the range 60 to 540 micropressor units of pitressin, corresponding to about 15 to 130 micropressor units of arginine-vasopressin. The method differs from previous techniques mainly in using urine density, rather than urinary flow rates, as the index of response.

Arginine Vasopressin↗