Fig. 7

Effects of GH-mediated intimal thickening of immature rat DA and aorta explants. a Elastica staining of the DA and the aorta. GH at a concentration of 200 ng/ml. Scale bars 50 μm. b GH significantly promoted intimal thickening of the DA, but not the aorta. (n = 4–6). *p < 0.05,***p < 0.001. Data are expressed as means ± SEM. DA Ductus arteriosus, AO aorta, GH growth hormone, NS not significant