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To reveal the roles of uncoupling proteins (UCPs) in disorder of mitochondrial oxidative phosphorylation induced by free fatty acid during hypoxic exposure, the effects of palmitic acid on activity of UCPs, proton leak and mitochondrial membrane potential in hypoxia-exposed rat brain mitochondria
Obesity is associated with endoplasmic reticulum (ER) stress and activation of the unfolded protein response (UPR) in adipose tissue. In this study we identify physiological triggers of ER stress and of the UPR in adipocytes in vitro. We show that two markers of adipose tissue remodelling in
Exogenous ketone bodies (KBs), acetoacetate (AA), and β-hydroxybutyrate (BHB) act as alternative energy substrates in neural cells under starvation. The present study examined the endogenous ketogenic capacity of astroglia under hypoxia with/without glucose and the possible roles of KBs in neuronal
Earlier we found that being added to rat liver mitochondria, palmitic acid (Pal) plus Ca(2+) opened a cyclosporin A-insensitive pore, which remained open for a short time. Apparently, this pore is involved in the Pal-induced apoptosis and may also take part in the mitochondrial Ca(2+) recycling as a
Previous studies demonstrated a protective effect of hypoxia on subsequent death breathing oxygen. Four groups of rats were exposed to air for 120 hours plus 99% O2 for 52 hours (A + O2); 120 hours of hypoxia plus 52 hours 99% O2 (H + O2); 172 hours of only air (A); and 120 hours of only hypoxia
Metabolic syndrome is a risk factor for the development of cardiovascular diseases. Myocardial cell damage leads to an imbalance of energy metabolism, and many studies have indicated that short-term hypoxia during myocardial cell injury has a protective effect. In our previous animal studies, we
Metabolic regulation is inextricably linked with cardiac function. Fatty acid metabolism is a significant mechanism for creating energy for the heart. However, cardiomyocytes are able to switch the fatty acids or glucose, depending on different situations, such as ischemia or anoxia. Lipotoxicity in
Neonatal rat oligodendrocyte (OLG) cultures exposed to 6 h of gradual, progressive hypoxia in a GasPak (BBL, Becton Dickinson) apparatus were not injured or metabolically impaired, but instead showed a specific inhibition of de novo synthesis (measured by [3H]palmitic acid labeling) of the major
In the rat, a large number of in vitro studies on intestinal fatty acid uptake have been carried out. However, the results obtained under different experimental conditions are often contradictory. The present work is a critical approach to the experimental aspects which may modify in vitro
Superoxide anion generation and the impairment of oxidative phosphorylation yield were studied in rat skeletal muscle mitochondria submitted to anoxia/reoxygenation in vitro. Production of superoxide anion was detected after several cycles of anoxia/reoxygenation. Concomitantly, a decrease of state
To delineate the role of peroxisomes in the pathophysiology of hypoxia-reoxygenation we examined the functions of peroxisomes and mitochondria in cultured skin fibroblasts from controls and from patients with cells lacking peroxisomes (Zellweger cells). The loss of peroxisomal functions (lignoceric
OBJECTIVE
The aim was to show differences between the effects of various dietary long chain fatty acids (palmitic, oleic, linoleic, alpha and gamma linolenic acids) perfused in isolated rat hearts subjected to a sequence of high flow anoxia and subsequent reoxygenation.
METHODS
Isolated working rat
Gamma linolenic acid is a polyunsaturated fatty acid having selective anti-tumour properties with negligible systemic toxicity. In the present study, the anti-cancer potential of gamma linolenic acid and its effects on mitochondrial as well as hypoxia-associated marker was evaluated. The effect of
The mechanism of action of elisidepsin (PM02734, Irvalec®) is assumed to involve membrane permeabilization via attacking lipid rafts and hydroxylated lipids. Here we investigate the role of hypoxia in the mechanism of action of elisidepsin. Culturing under hypoxic conditions increased the
Different extracts of Rhodobryum giganteum Par. were screened with mice model of acute myocardial hypoxia induced by isoproterenol and pituitrin, eight compounds, i.e. p-hydroxycinnamic acid, caffeic acid-4-O-β-d-glucopyranoside, salicin, 7,8-dihydroxy coumarin, menthol, allantoin, palmitic acid,