lipase/hypoxia

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Monoacylglycerol lipase. Regulation and increased activity during hypoxia and ischemia.

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The presence of monoacylglycerol lipase was established in extracts of acetone-dried powders from rat and bovine brains using thioester substrate analogs. At pH 7.4, the apparent Km and Vmax values for 1-S-decanoyl-1-mercapto-2,3-propanediol were 56 microM and 227 nmol/h/mg protein in bovine gray

Effect of neonatal hypoxia on the development of hepatic lipase in the rat.

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Increases in plasma lipids occur during hypoxia in suckling but not in weaned rats and may result from altered hepatic enzyme activity. We exposed rats to 7 days of hypoxia from birth to 7 days of age (suckling) or from 28 to 35 days of age (weaned at day 21). Hypoxia led to an increase in hepatic

Identification and characterisation of small-molecule inhibitors of Rv3097c-encoded lipase (LipY) of Mycobacterium tuberculosis that selectively inhibit growth of bacilli in hypoxia.

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The mycobacterial Rv3097c-encoded lipase LipY is considered as a true lipase involved in the hydrolysis of triacylglycerol stored in lipid inclusion bodies for the survival of dormant mycobacteria. To date, orlistat is the only known LipY inhibitor. In view of the important emerging role of this

Endothelin regulates intermittent hypoxia-induced lipolytic remodelling of adipose tissue and phosphorylation of hormone-sensitive lipase.

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Obstructive sleep apnoea syndrome is characterized by repetitive episodes of upper airway collapse during sleep resulting in chronic intermittent hypoxia (IH). Obstructive sleep apnoea syndrome, through IH, promotes cardiovascular and metabolic disorders. Endothelin-1 (ET-1) secretion is upregulated

Lipase member H is a downstream molecular target of hypoxia inducible factor-1α and promotes papillary thyroid carcinoma cell migration in BCPAP and KTC-1 cell lines.

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Background

Papillary thyroid carcinoma (PTC) is the most common type of thyroid carcinoma, which is associated with a high incidence of lymph-node metastasis. Multiple biomarkers have been identified for the precise diagnosis of PTC at an early stage. However, their role in PTC

Effects of acute hypoxia on human adipose tissue lipoprotein lipase activity and lipolysis.

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Adipose tissue regulates postprandial lipid metabolism by storing dietary fat through lipoprotein lipase-mediated hydrolysis of exogenous triglycerides, and by inhibiting delivery of endogenous non-esterified fatty acid to nonadipose tissues. Animal studies show that acute hypoxia, a model of

Hypoxia-inducible lipid droplet-associated protein inhibits adipose triglyceride lipase.

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Elaborate control mechanisms of intracellular triacylglycerol (TAG) breakdown are critically involved in the maintenance of energy homeostasis. Hypoxia-inducible lipid droplet-associated protein (HILPDA)/hypoxia-inducible gene-2 (Hig-2) has been shown to affect intracellular TAG levels, yet, the

Intermittent hypoxia inhibits clearance of triglyceride-rich lipoproteins and inactivates adipose lipoprotein lipase in a mouse model of sleep apnoea.

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OBJECTIVE Delayed lipoprotein clearance is associated with atherosclerosis. This study examined whether chronic intermittent hypoxia (CIH), a hallmark of obstructive sleep apnoea (OSA), can lead to hyperlipidaemia by inhibiting clearance of triglyceride rich lipoproteins (TRLP). RESULTS Male

Phospholipase D2 promotes degradation of hypoxia-inducible factor-1α independent of lipase activity.

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Hypoxia-inducible factor-1α (HIF-1α) is a key transcriptional mediator that coordinates the expression of various genes involved in tumorigenesis in response to changes in oxygen tension. The stability of HIF-1α protein is determined by oxygen-dependent prolyl hydroxylation, which is required for

Hypoxia, Hypoxia-Inducible Gene 2 (HIG2)/HILPDA, and intracellular lipolysis in cancer

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Tumor tissues are chronically exposed to hypoxia owing to aberrant vascularity. Hypoxia induces metabolic alterations in cancer, thereby promoting aggressive malignancy and metastasis. While previous efforts largely focused on adaptive responses in glucose and glutamine metabolism, recent studies

MiR-27 alleviates myocardial cell damage induced by hypoxia/reoxygenation via targeting TGFBR1 and inhibiting NF-κB pathway.

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MiR-27 prevents atherosclerosis by inhibiting inflammatory responses induced by lipoprotein lipase. Overexpression of miR-27b attenuates angiotensin-induced atrial fibrosis. Nevertheless, studies have rarely investigated on the effect of miR-27 in cardiomyocyte injury. H9c2 cells were transfected

Lipoprotein lipase activity in ischaemic and anoxic myocardium.

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Myocardial lipoprotein lipase (LPL) activity during ischaemia has not been fully understood, although it plays an important role in regulating myocardial fatty acid metabolism. In this experiment, the effects of ischaemia (Experiment A) and anoxia (Experiment B) on two distinct fractions of LPL,

Induction of adipocyte-like phenotype in human mesenchymal stem cells by hypoxia.

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Human mesenchymal stem cells (hMSCs) have the capacity to differentiate along several pathways to form bone, cartilage, tendon, muscle, and adipose tissues. The adult hMSCs reside in vivo in the bone marrow in niches where oxygen concentration is far below the ambient air, which is the most commonly

Hypoxia inhibition of adipocytogenesis in human bone marrow stromal cells requires transforming growth factor-beta/Smad3 signaling.

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Although hypoxia and transforming growth factor-beta (TGF-beta) inhibit differentiation of adipocytes from preadipocytes and bone marrow-derived cells in several species, the relationship between hypoxia and TGF-beta signaling in adipocytogenesis is unknown. In this study, we evaluated the

Hypoxia increases leptin expression in human PAZ6 adipose cells.

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OBJECTIVE Leptin, an adipose tissue-derived cytokine involved in the control of body weight, also participates in a variety of biological functions, including angiogenesis. Because reduced oxygen availability is a major inducer of angiogenesis, we hypothesized that low cellular oxygen tension could

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