The effects of running stress on plasma vitamin A levels in rats.
The plasma concentrations of vitamin A, zinc and proteins and the hepatic level of vitamin A were determined in rats subjected to running as a model for stress and which were receiving standard or vitamin-A free diets. All rats showed a decrease in plasma vitamin A with running compared with non-running control animals. Hepatic levels of vitamin A were higher in these two test groups than in their weight- and age-matched non-running controls. The data support that running, like other forms of stress, decreases plasma vitamin A, consistent with the retention of vitamin A in the liver.
Brandt
R B
RB
Department of Biochemistry and Molecular Biophysics, and Preventive Medicine, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298-0614, USA.
Doyle
B A
BA
Chan
W
W
Poland
J L
JL
Seibel
H R
HR
D000818:Animals; D001798:Blood Proteins / Q000032:analysis; D008099:Liver / Q000737:chemistry / Q000648:ultrastructure; D008297:Male; D008854:Microscopy, Electron; D015388:Organelles / Q000648:ultrastructure; D010805:Physical Conditioning, Animal; D051381:Rats; D017207:Rats, Sprague-Dawley; D012709:Serum Albumin / Q000032:analysis; D013312:Stress, Physiological / Q000097:blood* / Q000503:physiopathology; D014801:Vitamin A / Q000032:analysis / Q000097:blood*; D015032:Zinc / Q000097:blood
D001798:Blood Proteins; D012709:Serum Albumin; D014801:Vitamin A; D015032:Zinc