Effect of CXCR4 inhibitor on wall thickness of pulmonary arteries induced by chronic hypoxia in rats. (A) Wall thickness showing quantitative data on percent wall thickness (%WT) (left panel) and representative microphotographs (right panel). TA = terminal bronchial arterioles; I A = intra-acinous arterioles. (B) Body weight change. *p < 0.05 as compared with other groups. (C) hematocrit. *p < 0.05 as compared with normoxia. n = 5 rats for each group.