Restricted expression of the erythroid/brain glucose transporter isoform to perivenous hepatocytes in rats. Modulation by glucose

J Clin Invest. 1990 Sep;86(3):986-92. doi: 10.1172/JCI114801.

Abstract

The "erythroid/brain" glucose transporter (GT) isoform is expressed only in a subset of hepatocytes, those forming the first row around the terminal hepatic venules, while the "liver" GT is expressed in all hepatocytes. After 3 d of starvation, a three- to fourfold elevation of expression of the erythroid/brain GT mRNA and protein is detected in the liver as a whole; this correlates with the expression of this GT in more hepatocytes, those forming the first three to four rows around the hepatic venules. Starvation-dependent expression of the erythroid/brain GT on the plasma membrane of these additional hepatocytes is lost within 3 h of glucose refeeding; however, by immunoblotting we show that the protein is still present. Its loss from the surface is possibly explained by internalization.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Blotting, Northern
  • Blotting, Western
  • Cell Membrane / metabolism
  • Fluorescent Antibody Technique
  • Gene Expression
  • Glucose / pharmacology
  • Liver / metabolism*
  • Monosaccharide Transport Proteins / classification
  • Monosaccharide Transport Proteins / metabolism*
  • RNA, Messenger / genetics
  • Rats
  • Rats, Inbred Strains
  • Starvation
  • Time Factors
  • Tissue Distribution

Substances

  • Monosaccharide Transport Proteins
  • RNA, Messenger
  • Glucose