PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 19374868-2 2009 In this study, we investigated the effects of the L-type calcium channel blockers such as nifedipine, efonidipine cilnidipine, diltiazem, and verapamil, on the activity of hypoxia-inducible factor-1 (HIF-1), a key transcription factor in control of hypoxia-induced gene expression. Diltiazem 127-136 hypoxia inducible factor 1 subunit alpha Homo sapiens 172-198