Glucose uptake in muscle cell cultures from endurance-trained men.

Journal Article

PURPOSE: To examine noninsulin- (basal) and insulin-mediated glucose uptake in human skeletal muscle cells from endurance-trained and sedentary individuals. METHODS: Muscle biopsies (vastus lateralis) were obtained from competitive, endurance-trained athletes (N=12; VO2peak 64.9+/-2.3 mL.kg-1.min-1) and their sedentary counterparts (N=8; VO2peak 51.8+/-2.2 mL.kg-1.min-1), and isolated satellite cells allowed to proceed to myotubes. RESULTS: The myotubes exhibited a dose response for glucose uptake with increasing insulin concentrations; maximal glucose uptake was approximately 1.5-fold over basal. In relation to exercise training status, basal glucose uptake was significantly (P<0.05) elevated by approximately 75% in the endurance-trained versus sedentary men (20.1+/-2.1 vs 11.9+/-1.9 pmol.mg protein-1.min-1, respectively). This difference persisted at insulin concentrations of 10 and 1000 etaM, although the relative increase in insulin-mediated glucose uptake (fold increase over basal) did not differ between the sedentary and endurance-trained cells. CONCLUSIONS: These data suggest that cultured skeletal muscle cells from endurance-trained athletes may differ in respect to basal glucose uptake.

Full Text

Duke Authors

Cited Authors

  • Berggren, JR; Tanner, CJ; Koves, TR; Muoio, DM; Houmard, JA

Published Date

  • April 2005

Published In

Volume / Issue

  • 37 / 4

Start / End Page

  • 579 - 584

PubMed ID

  • 15809555

International Standard Serial Number (ISSN)

  • 0195-9131

Language

  • eng

Conference Location

  • United States