PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16878432-2 2006 ET-1 displays an in vitro inhibitory effect on basal parathyroid hormone (PTH) secretion and also counteracts PTH hypersecretion stimulated by low calcium. Calcium 147-154 endothelin 1 Homo sapiens 0-4 16878432-13 2006 RESULTS: ET-1 exhibited a dose-dependent inhibitory effect (from 10(-12) - 10(-7) M) on PTH mRNA expression of parathyroid cells, either in the basal or in the low-calcium-stimulated states. Calcium 164-171 endothelin 1 Homo sapiens 9-13