Angiotensin-converting enzyme 2 in lung diseases

Background—The detrimental effects of high dietary salt intake may not only involve effects on blood pressure and organ hypertrophy but also lead to tissue fibrosis independently of these factors. Methods and Results—The effect of a normal (1%) or high (8%) sodium chloride diet on myocardial and renal fibrosis was assessed by quantitative histomorphometry in spontaneously hypertensive rats (SHRs) and normotensive Wistar-Kyoto rats (WKYs). The effect of salt on transforming growth factor-β1 (TGF-β1) gene expression was assessed by Northern blot hybridization. A high-salt diet from 8 to 16 weeks of age resulted in increased blood pressure and left ventricular and renal hypertrophy in both WKYs and SHRs. Marked interstitial fibrosis was demonstrated in the left ventricle (LV), glomeruli, and renal tubules and in intramyocardial arteries and arterioles but not in the right ventricle. The collagen volume fraction increased significantly after high-salt diet in the LV, intramyocardial arteries and arterioles, g...

Salt Induces Myocardial and Renal Fibrosis in Normotensive and Hypertensive Rats

. A prevention protocol has demonstrated that bone morphogenetic protein-7 (BMP-7) blunted the development of fibrosis in a rat model of unilateral ureteral obstruction. This prevention protocol also preserved, to an extent, renal function. The prevention protocol was extended and a treatment protocol used to examine if BMP-7 was beneficial at limiting fibrosis of the kidney when the BMP-7 was administered during the progression of fibrotic disease. Animals were distributed into four groups. Group 1 received vehicle, group 2 received enalapril (12.5 mg/kg body wt per d), group 3 received BMP-7 (50 or 300 μg/kg), and group 4 received both the enalapril and the high dose of BMP-7. Rats underwent reversible unilateral ureteral obstruction for 3 d, after which the obstruction was relieved. In the treatment protocol, 300 μg/kg BMP-7 was given after the release of obstruction. Seven days after release of the obstruction and the onset of treatment glomerular filtration rate (GFR), renal blood flow, and various histologic indexes of fibrosis were determined. On a consistent basis, BMP-7 treatment alone was found to be slightly but significantly ( P P P

Bone Morphogenetic Protein-7 Improves Renal Fibrosis and Accelerates the Return of Renal Function

Chronic obstructive pulmonary disease and cardiovascular disease

The Differentiation and Function of Myofibroblasts is Regulated by Mast Cell Mediators

Fibrosis, a common pathway to organ failure: angiotensin II and tissue repair.

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Fibrosis, a common pathway to organ failure: angiotensin II and tissue repair.