N-(3-aminopropyl)pyrrolidin-2-one: A physiological excretory product deriving from spermidine

Nitrogenous excretion by the terrestrial anomuran crab Birgus latro L. was examined. The main excretory product was uric acid, representing 79.5 % of total excretory nitrogen. It was eliminated as white faeces separate from undigested food material and made up 82.6% of excretory faecal nitrogen. The faeces were the principal route of nitrogenous excretion, accounting for 96.2% of total excretion. Loss of nitrogen in the urine and as gaseous ammonia was negligible. The midgut gland had substantial activity of xanthine oxidase and was considered to be the site of production of uric acid and its point of entry into the gut

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Response : Uric Acid: The Main Nitrogenous Excretory Product of Birds

Science ◽

10.1126/science.170.3953.98-b ◽

1970 ◽

Vol 170 (3953) ◽

pp. 98-99

Author(s):

Robert L. Folk

Keyword(s):

Uric Acid ◽

Excretory Product

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Localization of an insoluble excretory product in Cephalogonimus americanus (Trematoda)

Comparative Biochemistry and Physiology Part A Physiology ◽

10.1016/0300-9629(71)90139-3 ◽

1971 ◽

Vol 38 (3) ◽

pp. 713-IN15 ◽

Cited By ~ 2

Author(s):

Peter W. Pappas

Keyword(s):

Excretory Product

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Release of 5-hydroxytryptamine and adenosinetriphosphate in extracorporeal circulatory systems as a result of corpuscular blood trauma

American Journal of Physiology-Legacy Content ◽

10.1152/ajplegacy.1959.197.6.1195 ◽

1959 ◽

Vol 197 (6) ◽

pp. 1195-1198 ◽

Cited By ~ 14

Author(s):

H. S. S. Sarajas ◽

R. Kristoffersson ◽

M. H. Frick

Keyword(s):

Cardiac Surgery ◽

Urinary Excretion ◽

Extracorporeal Circuit ◽

Model Experiments ◽

Excretory Product ◽

Opposite Trend ◽

Suggestive Evidence ◽

Hydroxyindoleacetic Acid ◽

Blood Trauma

Model experiments in rabbits and dogs with a simple extracorporeal circuit yielded suggestive evidence that 5-hydroxytryptamine (5-HT, serotonin) and adenosinetriphosphate (ATP) are released into plasma as a result of corpuscular blood trauma. Concurrently the urinary excretion of 5-HT was markedly increased, while that of 5-hydroxyindoleacetic acid (5-HIAA), the main excretory product of 5-HT, showed the opposite trend. In view of the potent vasoactive, cardiopulmonary and allied effects of ATP and 5-HT the findings are applicable as explanations for some features associated with perfusion experiments in general. They may also serve as a guide for disentangling the mechanisms of some complications including the fatalities following the use of heart-lung machines for open cardiac surgery.

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CA 125 is an Excretory Product of Human Endometrial Glands

Biology of Reproduction ◽

10.1095/biolreprod42.4.721 ◽

1990 ◽

Vol 42 (4) ◽

pp. 721-726 ◽

Cited By ~ 20

Author(s):

J. Weintraub ◽

P. Bischof ◽

L. Tseng ◽

M. Redard ◽

P. Vassilakos

Keyword(s):

Ca 125 ◽

Excretory Product

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Presence of lipids in the secretory/excretory product from Toxocara canis

Veterinary Parasitology ◽

10.1016/0304-4017(93)90207-4 ◽

1993 ◽

Vol 51 (1-2) ◽

pp. 155-158 ◽

Cited By ~ 6

Author(s):

G. Niedfeld ◽

B. Pezzani ◽

M. Minvielle ◽

J.A. Basualdo Farjat

Keyword(s):

Toxocara Canis ◽

Excretory Product

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Arginine synthesis and nitrogen excretion in the myxomycete Physarum polycephalum

Canadian Journal of Microbiology ◽

10.1139/m80-082 ◽

1980 ◽

Vol 26 (4) ◽

pp. 492-495 ◽

Cited By ~ 2

Author(s):

Lansing M. Prescott ◽

James T. Rector ◽

Ronald K. Freund ◽

Denley B. Jacobson

Keyword(s):

Uric Acid ◽

Physarum Polycephalum ◽

Biosynthetic Pathway ◽

Liquid Culture ◽

Urease Activity ◽

Ammonia Nitrogen ◽

Nitrogen Excretion ◽

Nutritional Requirement ◽

Excretory Product ◽

Variable Quantity

The nitrogen excretory metabolism of the myxomycete Physarum polycephalum was studied. When cultured in partially defined broth medium or on agar, the principal excretory product was ammonia nitrogen. A small, variable quantity of urea was excreted in liquid culture. No uric acid or other purines were detected in the cultures. When microplasmodia were incubated with sodium [14C]bicarbonate, radioisotope was incorporated into citrulline, arginine, and urea. Incubation with L-[carbamoyl-14C]citrulline yielded labelled arginine, urea, and CO2. Substantial urease activity was found in extracts of the microplasmodia. These results, in conjunction with the lack of an absolute nutritional requirement for arginine, provide evidence that Physarum has a functional arginine biosynthetic pathway, an arginase, and a urease.

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