PMID- 1893611 OWN - NLM STAT- MEDLINE DCOM- 19911023 LR - 20190918 IS - 0730-0077 (Print) IS - 0730-0077 (Linking) VI - 13 IP - 3 DP - 1991 TI - Effect of circulating factors on vascular smooth muscle contraction and its calcium uptake in uremia. PG - 383-400 AB - Uremia is often associated with alterations in calcium metabolism and vascular smooth muscle function in hypertension and atherosclerosis. The ways in which these conditions inter-relate are not clearly understood. In order to study the possibility that circulating factors might influence smooth muscle function, experiments were performed on rat aortic strips. The serum from both uremic patients and rats enhanced the norepinephrine-induced contraction (NEIC) and net 45-calcium uptake in rat aortic strips. In a similar manner, the serum of parathyroidectomized uremic rats also increased the NEIC, whereas verapamil reduced the aortic response to levels below those of the control, in the presence of uremic serum. These findings suggest that in both chronic (patients) and early (rats) stages of uremia, there is a circulating factor, different from parathyroid hormone, that affects calcium uptake and vascular smooth muscle contraction. FAU - Banos, G AU - Banos G AD - Department of Biochemistry, Instituto Nacional de Cardiologia Ignacio Chavez, Mexico City. FAU - Franco, M AU - Franco M FAU - Bobadilla, N A AU - Bobadilla NA FAU - Lopez-Zetina, P AU - Lopez-Zetina P FAU - Ceballos, G AU - Ceballos G FAU - Ponce, A AU - Ponce A FAU - Ramirez, D AU - Ramirez D FAU - Herrera-Acosta, J AU - Herrera-Acosta J LA - eng PT - Journal Article PL - United States TA - Clin Exp Hypertens A JT - Clinical and experimental hypertension. Part A, Theory and practice JID - 8207790 RN - 0 (Cardiovascular Agents) RN - SY7Q814VUP (Calcium) RN - X4W3ENH1CV (Norepinephrine) SB - IM MH - Adult MH - Animals MH - Aorta, Thoracic/physiopathology MH - Biological Transport, Active MH - Calcium/*metabolism MH - Cardiovascular Agents/blood MH - Female MH - Humans MH - In Vitro Techniques MH - Male MH - Muscle Contraction/physiology MH - Muscle, Smooth, Vascular/*physiopathology MH - Norepinephrine/pharmacology MH - Parathyroidectomy MH - Rats MH - Rats, Inbred Strains MH - Uremia/blood/*physiopathology EDAT- 1991/01/01 00:00 MHDA- 1991/01/01 00:01 CRDT- 1991/01/01 00:00 PHST- 1991/01/01 00:00 [pubmed] PHST- 1991/01/01 00:01 [medline] PHST- 1991/01/01 00:00 [entrez] AID - 10.3109/10641969109045058 [doi] PST - ppublish SO - Clin Exp Hypertens A. 1991;13(3):383-400. doi: 10.3109/10641969109045058.