Format

Send to

Choose Destination
See comment in PubMed Commons below
Phytomedicine. 2014 Jan 15;21(2):118-22. doi: 10.1016/j.phymed.2013.08.014. Epub 2013 Sep 21.

Curcumin is a direct inhibitor of glucose transport in adipocytes.

Author information

1
Department of Chemistry & Biochemistry, SUNY Oneonta, Oneonta, NY 13820, USA. Electronic address: allan.green@oneonta.edu.
2
Bassett Healthcare, Cooperstown, NY 13326, USA.

Abstract

Curcumin has been reported to inhibit insulin signaling and translocation of GLUT4 to the cell surface in 3T3-L1 adipocytes. We have investigated the effect of curcumin on insulin signaling in primary rat adipocytes. Curcumin (20 μM) inhibited both basal and insulin-stimulated glucose transport (2-deoxyglucose uptake), but had no effect on insulin inhibition of lipolysis. Dose-response experiments demonstrated that curcumin (0-100 μM) inhibited basal and insulin-stimulated glucose transport, but even at the highest concentration tested did not affect lipolysis. Inhibition was equal in cells that had been pre-incubated with curcumin and in cells to which curcumin was added immediately before the glucose transport assay. Similarly, time-course experiments revealed that the inhibitory effect of curcumin was evident at the earliest time point tested (30 s). Thus it is unlikely that inhibition of insulin signaling or of translocation of GLUT4 to the cell surface is involved in the inhibitory effect of curcumin. Curcumin did not affect the stimulatory action of insulin on phosphorylation of Akt at serine 473. We conclude that curcumin is a direct inhibitor of glucose transporters in rat adipocytes.

KEYWORDS:

Adipocytes; Curcumin; Glucose transport; Insulin action; Lipolysis

PMID:
24060216
DOI:
10.1016/j.phymed.2013.08.014
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center