Appearance of insulin in plasma and CSF at different times after the administration of subcutaneous DET and GLAR in mice and the effect of chronic DET.

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Appearance of insulin in plasma and CSF at different times after the administration of subcutaneous DET and GLAR in mice and the effect of chronic DET and GLAR treatment on CSF insulin. Appearance of insulin in plasma and CSF at different times after the administration of subcutaneous DET and GLAR in mice and the effect of chronic DET and GLAR treatment on CSF insulin. Injection of either DET or GLAR (1 unit/kg s.c.) led to increased plasma insulin at 6–12 h. By 24 h, only GLAR-treated animals continued to have elevated plasma insulin (A). In contrast, CSF insulin levels were increased in both groups at 6, 12, and 24 h; but at 48 h, DET-treated animals had elevated CSF insulin levels, whereas CSF insulin of GLAR-treated animals had returned to baseline (B). Twenty-four hours after cessation of chronic treatment with DET or GLAR, mice treated with GLAR continued to have elevated plasma insulin (C), but the reverse occurred in CSF, where DET-treated, but not GLAR-treated, mice had elevated insulin. Data are means ± SEM. *P < 0.05 vs. control, +P < 0.05 vs. GLAR. CON, control. Denovan P. Begg et al. Diabetes 2015;64:2457-2466 ©2015 by American Diabetes Association