1,721,007 research outputs found
[Pulmonitis caused by Coxiella burneti and Chlamydia psittaci. 2 years of research in Marche]
No full textLipid peroxidation causes an increase of lipid order and a decrease of 5'-nucleotidase activity in the liver plasma membrane
No full text
Rabbit cholesterol-rich serum decreases the β-adrenergic receptor density of human lymphocytes without altering membrane microviscosity
No full textInfluence of membrane fluidity on 5'-nucleotidase activity in isolated hepatocyte plasma membrane
No full textThe influence of membrane microviscosity on 5'-nucleotidase activity has been investigated on liver plasma membrane preparations from rats during aging and following diet restriction. In addition the microviscosity of membranes from old rats was changed in vitro by the Active Lipids. During aging the membrane microviscosity increased progressively and in parallel the activity of 5'-nucleotidase decreased. Diet restriction was able to slow down the modification of both parameters. The experiment performed with the Active Lipids further supports that membrane microviscosity modulated the enzyme activity
Food restriction in female Wistar rats. III. Thermotropic transition of membrane lipid and 5'-nucleotidase activity in hepatocytes
No full textFood restriction in female Wistar rats, IV. Morphometric parameters of cerebellar synapses
No full textDiet restriction: a tool to prolong the lifespan of experimental animals. Model and current hypothesis of action
No full textFood restriction in female Wistar rats. II. β-adrenoceptor density in the cerebellum and in the splenic lymphocytes
No full textThe effect of diet restriction, applied on an every-other-day schedule from 3.5 months of age on, has been investigated on the β-adrenoceptor density in the cerebellum and in the splenic lymphocytes of old female Wistar rats. Comparing animals 6 months and 24 months old fed ad libitum, a 75% age-dependent reduction in specific binding of the agonist dihydroalprenolol was observed in cerebellar membrane preparations, while the β-adrenoceptor density of lymphocytes remained unaltered. Diet restriction induced a partial recovery of the age-related decrease of this parameter in the cerebellum without affecting the receptor density of lymphocytes. Present results suggest that undernutrition delays the appearance of those alterations related to aging. © 1990
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