Distinct Pathways of Ca2+Sensitization in Porcine Coronary Artery
نویسندگان
چکیده
منابع مشابه
Porcine Coronary Artery
coronary artery contraction evoked by thromboxane A2 (TXA2) were studied in vitro. Ring preparations of porcine proximal coronary artery were suspended in a Magnus apparatus filled with Tyrode's solution at 370 C and aerated with 100%0 02, and the isometric tension of the contractions was measured. Insulin itself caused neither contraction nor relaxation. Insulin had no significant effect on th...
متن کاملSmooth Muscle of the Porcine Coronary Artery
To study the mechanism of vasodilation induced by 6-(3-dimethylaminopropionyl) forskolin (NKH477), a water-soluble forskolin derivative, its effects on the acetylcholine (ACh)-induced contraction of muscle strips of porcine coronary artery were examined. [Ca2"]1, isometric force, and cellular concentrations of cAMP and inositol 1,4,5-trisphosphate were measured. NKH477 (0.1-1.0 ,uM), isoprotere...
متن کاملBiaxial vasoactivity of porcine coronary artery.
The passive mechanical properties of blood vessel mainly stem from the interaction of collagen and elastin fibers, but vessel constriction is attributed to smooth muscle cell (SMC) contraction. Although the passive properties of coronary arteries have been well characterized, the active biaxial stress-strain relationship is not known. Here, we carry out biaxial (inflation and axial extension) m...
متن کاملDistinct pathways of Ca(2+) sensitization in porcine coronary artery: effects of Rho-related kinase and protein kinase C inhibition on force and intracellular Ca(2+).
Alterations of the Ca(2+) sensitivity of contraction have been reported for porcine coronary artery, but the mechanisms are not clearly understood. We investigated the mechanism(s) of Ca(2+) sensitization in response to the thromboxane A(2) analogue (U46619). Our hypothesis is that different mechanisms of Ca(2+) sensitization could be distinguished by their distinct time courses. Therefore, we ...
متن کاملCoronary artery calcium (CAC) score – a prognostic tool in coronary artery disease?
Introduction: The aim of this study was to evaluate the impact of measurement of coronary artery calcification score (CAC) in patients with suspected coronary artery disease (CAD) and a normal myocardial perfusion scan. Methods: In a prospective study we measured the calcium score of 74 patients (29 m, 45 f, mean age 58.7 (m) and 64.4 (f)) with suspicion of CAD and a normal perfusion scan. In ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Circulation Research
سال: 2001
ISSN: 0009-7330,1524-4571
DOI: 10.1161/hh1201.092035