Effect of catch-up growth on GLP-1R mRNA expression in islets. A1. RT-PCR products from RNA extracted from rat (n = 5-6 per group) pancreatic islets. The beta actin control was comparable in all groups. A2. The statistical results of real time quantitative PCR products from RNA extracted from rat pancreatic islets. Data are expressed as means ± SD. *P ≤ 0.05 versus NC group.