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1 November 2003 GLUCOSE TRANSPORTER CONTENT AND GLUCOSE UPTAKE IN SKELETAL MUSCLE CONSTRUCTS ENGINEERED IN VITRO
ERIN L. BAKER, ROBERT G. DENNIS, LISA M. LARKIN
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Abstract

Engineered muscle may eventually be used as a treatment option for patients suffering from loss of muscle function. The metabolic and contractile function of engineered muscle has not been well described; therefore, the purpose of this experiment was to study glucose transporter content and glucose uptake in engineered skeletal muscle constructs called myooids. Glucose uptake by way of 2-deoxyglucose and GLUT-1 and GLUT-4 transporter protein content was measured in basal and insulin-stimulated myooids that were engineered from soleus muscles of female Sprague–Dawley rats. There was a significant increase in the basal 2-deoxyglucose uptake of myooids compared with adult control (fivefold), contraction-stimulated (3.4-fold), and insulin-stimulated (threefold) soleus muscles (P = 0.0001, 0.0001, and 0.0001, respectively). In addition, there was a significant increase in the insulin-stimulated 2-deoxyglucose uptake of myooids compared with adult control soleus muscles in basal conditions (6.5-fold) and adult contraction-stimulated (4.5-fold) and insulin- stimulated (3.9-fold) soleus muscles (P = 0.0001, 0.0001, and 0.0001, respectively). There was a significant 30% increase in insulin-stimulated compared with basal 2-deoxyglucose uptake in the myooids. The myooid GLUT-1 protein content was 820% of the adult control soleus muscle, whereas the GLUT-4 protein content was 130% of the control soleus muscle. Myooid GLUT-1 protein content was 6.3-fold greater than GLUT-4 protein content, suggesting that the glucose transport of the engineered myooids is similar in several respects to that observed in both fetal and denervated skeletal muscle tissue.

ERIN L. BAKER, ROBERT G. DENNIS, and LISA M. LARKIN "GLUCOSE TRANSPORTER CONTENT AND GLUCOSE UPTAKE IN SKELETAL MUSCLE CONSTRUCTS ENGINEERED IN VITRO," In Vitro Cellular & Developmental Biology - Animal 39(10), 434-439, (1 November 2003). https://doi.org/10.1290/1543-706X(2003)039<0434:GTCAGU>2.0.CO;2
Received: 18 November 2003; Accepted: 1 January 2004; Published: 1 November 2003
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KEYWORDS
glucose transporter
glucose uptake
myooid
Skeletal muscle
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