کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3886116 1249535 2006 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Angiotensin II production and distribution in the kidney: I. A kinetic model
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی بیماری‌های کلیوی
پیش نمایش صفحه اول مقاله
Angiotensin II production and distribution in the kidney: I. A kinetic model
چکیده انگلیسی

Information on the levels of angiotensin II (Ang II) and its receptors in the various renal tissue compartments is still incomplete. A model is presented describing the kinetics of Ang II production, distribution, and disposal in the renal cortex. Basic features are: (1) the model is designed to derive, from Ang II measurements in blood and in whole tissue, estimates of the local densities of the Ang II type 1 (AT1) and type 2 (AT2) receptors, and to calculate the concentrations of endocrine and paracrine Ang II they actually ‘see’; (2) glomerular and peritubular tissue are conceived as separate regions (glomerular region (Glom), peritubular region (Pt)); (3) in Glom and in Pt, Ang II is homogeneously distributed in capillary blood and in interstitial fluid; (4) the model allows for local Ang II concentration gradients between interstitium and blood; (5) Ang II from the circulation diffuses into the interstitium of Glom after convective transcapillary transport; (6) Ang II produced in tubules or Pt enters the microcirculation through diffusive overflow from interstitium; (7) the presence of cell-surface-bound Ang II depends on the reaction with AT1 and AT2 receptors, and the presence of intracellular Ang II depends on the internalization of Ang II – AT1 receptor complex; and (8) the model provides for glomerular filtration, vasopeptidase-mediated degradation, and intracellular degradation as mechanisms of elimination. This model can serve as a framework for detailed quantitative studies of the renin–angiotensin system in the kidney.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Kidney International - Volume 69, Issue 9, 1 May 2006, Pages 1543–1552
نویسندگان
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