Differential translocation of the fatty acid transporter, FAT/CD36, and the glucose transporter, GLUT4, coordinates changes in cardiac substrate metabolism during ischemia and reperfusion. by Heather, L, Pates, K, Atherton, H, Cole, M, Ball, DR, Evans, R, Glatz, J, Luiken, J, Griffin, J, Clarke, K

“…CONCLUSIONS: During ischemia, FAT/CD36 moved away from the sarcolemma as GLUT4 moved toward the sarcolemma, associated with a shift from fatty acid oxidation to glycolysis, while intramyocardial lipid accumulation was prevented. …”

Insulin resistance, abnormal energy metabolism and increased ischemic damage in the chronically infarcted rat heart. by Murray, A, Lygate, C, Cole, M, Carr, C, Radda, G, Neubauer, S, Clarke, K

“…Here, we tested whether there is a link between insulin resistance and ischemic damage in the chronically infarcted Wistar rat heart, postulating that the heart would have decreased insulin sensitivity, with lower GLUT4 glucose transporter protein levels due to high circulating free fatty acid (FFA) concentrations. …”

Changes in cardiac substrate transporters and metabolic proteins mirror the metabolic shift in patients with aortic stenosis. by Heather, L, Howell, N, Emmanuel, Y, Cole, M, Frenneaux, M, Pagano, D, Clarke, K

“…FAT/CD36 and complex I of the electron transport chain were downregulated, whereas the glucose transporter GLUT4 was upregulated with increasing left ventricular mass index, a measure of cardiac hypertrophy. …”

Thiazolidinedione treatment normalizes insulin resistance and ischemic injury in the zucker Fatty rat heart. by Sidell, R, Cole, M, Draper, N, Desrois, M, Buckingham, R, Clarke, K

“…At 12 months of age, obese rat hearts were insulin resistant with decreased GLUT4 protein expression. During ischemia, glucose uptake was lower and depletion of ATP was greater in obese rat hearts, thereby significantly impairing recovery of contractile function during reperfusion. …”

Adenosine monophosphate-activated protein kinase activation, substrate transporter translocation, and metabolism in the contracting hyperthyroid rat heart. by Heather, L, Cole, M, Atherton, H, Coumans, W, Evans, R, Tyler, D, Glatz, J, Luiken, J, Clarke, K

“…The combined effects of T(3)-induced AMPK activation and insulin stimulation were associated with increased sarcolemmal GLUT4 localization and glycolytic flux in the hyperthyroid heart.…”

Abnormal function and glucose metabolism in the type-2 diabetic db/db mouse heart. by Panagia, M, Schneider, J, Brown, B, Cole, M, Clarke, K

“…Glucose uptake during ischemia was 21% lower than in controls, and post-ischemic recovery of cardiac function was decreased by 30% in db/db mouse hearts (p<0.05). Total cardiac GLUT 4 protein was 56% lower (p<0.01) in db/db mice than in controls. …”

Isoproterenol induces in vivo functional and metabolic abnormalities: similar to those found in the infarcted rat heart. by Heather, L, Catchpole, A, Stuckey, D, Cole, M, Carr, C, Clarke, K

“…Basal glycolysis and glycogen concentration were not changed, yet insulin stimulated glycolysis was decreased by 32%, accompanied by 33% lower insulin stimulated glucose transporter, GLUT4, protein levels in rat hearts following isoproterenol infusion, compared with controls. …”