Figure 2.
Knockdown of HIF-1α abolished the chronic hypoxia-upregulated Orai2 expression, while not affecting the upregulation of Orai1 in distal PAs of transgenic mice. HIF-1α+/+ and HIF-1α+/− mice were subjected to chronic hypoxia (10% O2, 21 days) or normoxia. Orai1 (a) and Orai2 (b) mRNA relative to 18 s was measured by qRT-PCR. Orai1 and Orai2 proteins were determined by western blotting (c, d and e). Representative blots (c) and mean intensity (d and e) for Orai1 and Orai2 blots relative to α-actin. Bar values are mean±S.E.M. (n=5 in each group). *P<0.05 versus respective normoxic control. #P<0.05 versus respective HIF-1α+/+ control. Brackets indicate ±S.E.