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Vascular CACNA1C

Gerhard P Dahl, Gregory E Conner, Feng Qiu, Junjie Wang, Edward Spindler, Jason A Campagna, H Peter Larsson
UNLABELLED: Clevidipine, a dihydropyridine (DHP) analogue, lowers blood pressure (BP) by inhibiting l-type calcium channels (CaV1.2; gene CACNA1C) predominantly located in vascular smooth muscle (VSM). However, clinical observations suggest that clevidipine acts by a more complex mechanism. Clevidipine more potently reduces pulmonary vascular resistance (PVR) than systemic vascular resistance and its spectrum of effects on PVR are not shared by other DHPs. Clevidipine has potent spasmolytic effects in peripheral arteries at doses that are sub-clinical for BP lowering and, in hypertensive acute heart failure, clevidipine, but not other DHPs, provides dyspnea relief, partially independent of BP reduction...
August 2016: EBioMedicine
Abdelhamid Sahraoui, Céline Dewachter, Geoffrey de Medina, Robert Naeije, Souhila Aouichat Bouguerra, Laurence Dewachter
BACKGROUND: Psammomys obesus gerbils are particularly prone to develop diabetes and obesity after brief period of abundant food intake. A hypercaloric high fat diet has been shown to affect cardiac function. Here, we sought to determine whether a short period of high fat feeding might alter myocardial structure and expression of calcium handling proteins in this particular strain of gerbils. METHODS: Twenty Psammomys obesus gerbils were randomly assigned to receive a normal plant diet (controls) or a high fat diet...
2016: PloS One
Nikolai M Soldatov
Cav1.2 calcium channels are the principal proteins involved in electrical, mechanical, and/or signaling functions of the cell. Cav1.2 couples membrane depolarization to the transient increase in intracellular Ca(2+) concentration that is a trigger for muscle contraction and CREB-dependent transcriptional activation. The CACNA1C gene coding for the Cav1.2 pore-forming α 1C subunit is subject to extensive alternative splicing. This review is the first attempt to follow the association between cell proliferation, Cav1...
2013: ISRN Biochemistry
Katrin Wenzel, Hannelore Haase, Gerd Wallukat, Wolfgang Derer, Sabine Bartel, Volker Homuth, Florian Herse, Norbert Hubner, Herbert Schulz, Marion Janczikowski, Carsten Lindschau, Christoph Schroeder, Stefan Verlohren, Ingo Morano, Dominik N Muller, Friedrich C Luft, Rainer Dietz, Ralf Dechend, Peter Karczewski
BACKGROUND: Agonistic autoantibodies directed at the alpha(1)-adrenergic receptor (alpha(1)-AAB) have been described in patients with hypertension. We implied earlier that alpha(1)-AAB might have a mechanistic role and could represent a therapeutic target. METHODOLOGY/PRINCIPAL FINDINGS: To pursue the issue, we performed clinical and basic studies. We observed that 41 of 81 patients with refractory hypertension had alpha(1)-AAB; after immunoadsorption blood pressure was significantly reduced in these patients...
2008: PloS One
Xiaoyang Cheng, Jianxi Liu, Maria Asuncion-Chin, Eva Blaskova, John P Bannister, Alejandro M Dopico, Jonathan H Jaggar
Voltage-dependent L-type Ca(2+) (Ca(V)1.2) channels are the principal Ca(2+) entry pathway in arterial myocytes. Ca(V)1.2 channels regulate multiple vascular functions and are implicated in the pathogenesis of human disease, including hypertension. However, the molecular identity of Ca(V)1.2 channels expressed in myocytes of myogenic arteries that regulate vascular pressure and blood flow is unknown. Here, we cloned Ca(V)1.2 subunits from resistance size cerebral arteries and demonstrate that myocytes contain a novel, cysteine rich N terminus that is derived from exon 1 (termed "exon 1c"), which is located within CACNA1C, the Ca(V)1...
October 5, 2007: Journal of Biological Chemistry
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