Journal
CELL METABOLISM
Volume 6, Issue 1, Pages 79-87Publisher
CELL PRESS
DOI: 10.1016/j.cmet.2007.06.002
Keywords
-
Categories
Funding
- NIDDK NIH HHS [K08 DK-69624, R01 DK043051, R01 DK-43051] Funding Source: Medline
Ask authors/readers for more resources
Intra-abdominal fat is associated with insulin resistance and cardiovascular risk. Levels of serum retinol-binding protein (RBP4), secreted by fat and liver cells, are increased in obesity and type 2 diabetes (T2D). Here we report that, in 196 subjects, RBP4 is preferentially expressed in visceral (Vis) versus subcutaneous (SC) fat. Vis fat RBP4 mRNA was increased similar to 60-fold and 12-fold in Vis and SC obese subjects respectively versus lean subjects, and similar to 2-fold with impaired glucose tolerance/T2D subjects versus normoglycemic subjects. In obese subjects, serum RBP4 was increased 2- to 3-fold, and serum transthyretin, which stabilizes RBP4 in the circulation, was increased 35%. Serum RBP4 correlated positively with adipose RBP4 mRNA and intra-abdominal fat mass and inversely with insulin sensitivity, independently of age, gender, and body mass index. RBP4 mRNA correlated inversely with GLUT4 mRNA in Vis fat and positively with adipocyte size in both depots. RBP4 levels are therefore linked to Vis adiposity, and Vis fat may be a major source of RBP4 in insulin-resistant states.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available