Uncontrolled proliferation is important in tumorigenesis. In the present study, the effects of glucosamine on lung cancer cell proliferation were investigated. The expression of cyclin E, one of the key cyclins in the G1/S transition, and Skp2, the ubiquitin ligase subunit that targets the negative cell cycle regulator, p27Kip1, were also assessed. Moreover, the underlying mechanisms of action ...

Atheroscleros is now considered as a chronic inflammatory disease, and glucosamine has a potential to exhibit anti-inflammatory action. Thus, we investigated the effect of glucosamine on LL-37-induced endothelial cell activation. HUVEC (human umbilical vein endothelial cells) were stimulated by LL-37 in the presence or absence of glucosamine (0.01-1 mM) or its analogue, N-acetylglucosamine (0.1...

L-Glutamine is a physiological inhibitor of endothelial NO synthesis. The present study was conducted to test the hypothesis that metabolism of glutamine to glucosamine is necessary for glutamine inhibition of endothelial NO generation. Bovine venular endothelial cells were cultured for 24 h in the presence of 0, 0.1, 0.5 or 2 mM D-glucosamine, or of 0.2 or 2 mM L-glutamine with or without 20 m...

There are more than 100 types of arthritis and its related conditions. The goal of arthritis treatment is to reduce joint pain and inflammation. In this regard, glucosamine is known to stop degenerative process of osteoarthritis. Topically applied products, compared with those taken orally, are safer and cause less complications. Various researches on different kinds of glucosamine showed that ...

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 573 1. Glucosamine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 574 2. Chondroitin Sulfate . . . . . . . . . . . . . . . . ....

Chronic exposure (48 h) to glucosamine resulted in a dose-dependent reduction of basal and insulin-stimulated glucose uptake activities in human skeletal muscle cell cultures from nondiabetic and type 2 diabetic subjects. Insulin responsiveness of uptake was also reduced. There was no change in total membrane expression of either GLUT1, GLUT3, or GLUT4 proteins. While glucosamine treatment had ...

1. The influence of insulin on the metabolism of [1-(14)C]glucosamine by diaphragm muscle from normal rats and rats rendered diabetic with streptozotocin has been studied. 2. The glucosamine was converted into glucosamine 1-phosphate, glucosamine 6-phosphate, glycogen, lactate and small amounts of other unidentified intermediates. 3. Insulin increased the incorporation of (14)C into glycogen in...

To study molecular mechanisms for glucosamine-induced insulin resistance, we induced complete and reversible insulin resistance in 3T3-L1 adipocytes with glucosamine in a dose- and time-dependent manner (maximal effects at 50 mM glucosamine after 6 h). In these cells, glucosamine impaired insulin-stimulated GLUT-4 translocation. Glucosamine (6 h) did not affect insulin-stimulated tyrosine phosp...

Background & Objective. Osteoarthritis is progressive degenerative disease resulting in significant affection of joints. Nonsteroidal anti-inflammatory drugs (NSAIDS) are widely used in this condition but are associated with significant side effects; hence the aim of this study was to evaluate the efficacy and tolerability of nutritional supplements such as Glucosamine, Chondroitin sulphate and...

Little is known about the biosynthesis of glucosamine in mammalian organisms. Previous studies have indicated the presence of enzymes in several mammalian tissues capable of synthesizing glucosamine (1, 2). Moreover, there is evidence that glucose, without scission of its carbon chain, may serve as the precursor of glucosamine in the intact animal (3, 4), as in bacteria (5, 6). However, except ...