Choline-deficient diet increases Z protein concentration in rat liver.
Feeding rats a diet deficient in choline results in fatty liver within 1 d. We studied the effect of short-term (1-3 d) choline deficiency on rat liver Z protein (fatty acid-binding protein). Groups of three females Sprague-Dawley rats were fed ad libitum a purified diet lacking choline and L-methionine or were supplemented with 0.2% choline chloride and 0.82% L-methionine. Animals were killed after 1, 2 or 3 d of consuming control or experimental diets and hepatic Z protein was prepared. Z protein in livers from experimental and control rats were estimated with the fluorescent probe dansylamino undecanoic acid. The corresponding fatty acid-binding activity was also determined. One day of choline-deficient diet increased Z protein concentration threefold, reaching a plateau on the second and third day. Fatty acid-binding activity of Z protein remained unchanged.
Dutta-Roy
A K
AK
Veterans Administration Medical Center, Dayton, OH.
Trinh
M V
MV
Sullivan
T F
TF
Trulzsch
D V
DV
D000818:Animals; D002352:Carrier Proteins / Q000378:metabolism*; D002796:Choline Deficiency / Q000378:metabolism*; D004032:Diet; D050556:Fatty Acid-Binding Proteins; D005227:Fatty Acids / Q000378:metabolism; D005260:Female; D008099:Liver / Q000378:metabolism*; D011485:Protein Binding; D051381:Rats; D011919:Rats, Inbred Strains; D013050:Spectrometry, Fluorescence
D002352:Carrier Proteins; D050556:Fatty Acid-Binding Proteins; D005227:Fatty Acids