Nitric oxide synthase blockade and body fluid volumes

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Nitric oxide synthase blockade and body fluid volumes.

The influence of chronic nitric oxide synthase inhibition with N G-nitro-L-arginine methyl ester (L-NAME) on body fluid distribution was studied in male Wistar rats weighing 260-340 g. Extracellular, interstitial and intracellular spaces, as well as plasma volume were measured after a three-week treatment with L-NAME (approximately 70 mg/kg per 24 h in drinking water). An increase in extracellu...

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Blockade of hepatic nitric oxide synthase causes insulin resistance.

The hypothesis was tested that insulin sensitivity, previously shown to depend on a functional hepatic parasympathetic reflex, was mediated by hepatic production of nitric oxide (NO). Insulin sensitivity was measured using the rapid insulin sensitivity test. N-nitro-l-arginine methyl ester (l-NAME, 2.5 and 5.0 mg/kg iv) and N-monomethyl-l-arginine (l-NMMA, 0.73 mg/kg), nitric oxide synthase (NO...

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Cardiac weight in hypertension induced by nitric oxide synthase blockade.

Wistar rats given a nitric oxide synthase inhibitor, NG-nitro-L-arginine-methyl ester (L-NAME), for 4 weeks develop time- and dose-dependent hypertension without cardiac hypertrophy. This initial study of the relation between left ventricular weight and L-NAME-induced hypertension has now been extended by giving 50 mg/kg per day L-NAME to Wistar rats (n = 30) for 8 weeks and comparing results w...

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Mitochondrial nitric oxide synthase.

Nitric oxide (NO) regulates several cellular functions via reversible regulation of mitochondrial respiration. Nitric oxide also reacts with mitochondrial superoxide anion to produce the potent oxidative species peroxynitrite that irreversibly hinders mitochondrial activities. Recent findings demonstrating that mitochondria produce NO via mitochondrial NO synthase (mtNOS) has intrigued several ...

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Nitric oxide/nitric oxide synthase, spermatogenesis, and tight junction dynamics.

During spermatogenesis, preleptotene and leptotene spermatocytes, residing in the basal compartment of the seminiferous epithelium, must traverse the blood-testis barrier (BTB) to gain entry to the adluminal compartment for further development at late stage VIII and early stage IX of the epithelial cycle. As such, the timely opening and closing of the BTB is crucial to spermatogenesis. A compro...

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ژورنال

عنوان ژورنال: Brazilian Journal of Medical and Biological Research

سال: 2002

ISSN: 0100-879X

DOI: 10.1590/s0100-879x2002000100019