Acetylglucosamine

221.21

221.21

1727589

231-368-2

V956696549

DTXSID10856111

29329985

119

-2.1

white to off-white saline suspension

1.54 g/cm³

205 °C

636.4°C at 760 mmHg

313.9±30.1 °C

1.576

soluble in concentrated hydrochloric acid, sulfuric acid, phosphoric acid and formic acid. Insoluble in water, dilute acids, dilute alkalis, concentrated alkalis and organic solvents.H2o: 50 mg/mL colorless to faint yellow solution, clear to very slightly hazy

2-8°C

7.12E-19mmHg at 25°C

42 º (c=2,water,2 hrs)

NONH for all modes of transport

3

36/37/38

24/25-36-26-22

LZ6651000

Xi

Irritant

Stable. Incompatible with strong oxidizing agents.

Mouse, intravenous LD50 is 4170 mg/kg. Side effects that have been reported are mainly mild gastrointestinal complaints such as heartburn, epigastric distress and diarrhea. No allergic reactions have been reported including sulfa-allergic reactions to glucosamine sulfate.

For the treatment and prevention of osteoarthritis, by itself or in combination with chondroitin sulfate.

Approximately 90% of orally administered glucosamine (salt form) gets absorbed from the small intestine.

A significant fraction of ingested glucosamine is catabolized by first-pass metabolism in the liver.

The mechanism of action in relieving arthritic pain and in repair of cartilage is a matter of speculation. Biochemically, glucosamine is involved in glycoprotein metabolism. Glycoproteins, known as proteoglycans, form the ground substance in the extra-cellular matrix of connective tissue. Proteoglycans are polyanionic substances of high-molecular weight and contain many different types of heteropolysaccharide side-chains covalently linked to a polypeptide-chain backbone. These polysaccharides make up to 95% of the proteoglycan structure. In fact, chemically, proteoglycans resemble polysaccharides more than they do proteins. The polysaccharide groups in proteoglycans are called glycosaminoglycans (GAGs). GAGs include hyaluronic acid, chondroitin sulfate, dermatan sulfate, keratan sulfate, heparin and heparan sulfate. All of the GAGs contain derivatives of glucosamine or galactosamine. Glucosamine derivatives are found in hyaluronic acid, keratan sulfate and heparan sulfate. Chondroitin sulfate contains derivatives of galactosamine. The glucosamine-containing glycosaminoglycan hyaluronic acid is vital for the function of articular cartilage. GAG chains are fundamental components of aggrecan found in articular cartilage. Aggrecan confers upon articular cartilage shock-absorbing properties. It does this by providing cartilage with a swelling pressure that is restrained by the tensile forces of collagen fibers. This balance confers upon articular cartilage the deformable resilience vital to its function. In the early stages of degenerative joint disease, aggrecan biosynthesis is increased. However, in later stages, aggrecan synthesis is decreased, leading eventually to the loss of cartilage resiliency and to most of the symptoms that accompany osteoarthritis. During the progression of osteoarthritis, exogenous glucosamine may have a beneficial role. It is known that, in vitro, chondrocytes do synthesize more aggregan when the culture medium is supplemented with glucosamine. N-acetylglucosamine is found to be less effective in these in vitro studies. Glucosamine has also been found to have antioxidant activity and to be beneficial in animal models of experimental arthritis. The counter anion of the glucosamine salt (i.e. chloride or sulfate) is unlikely to play any role in the action or pharmacokinetics of glucosamine. Further, the sulfate in glucosamine sulfate supplements should not be confused with the glucosamine sulfate found in such GAGs as keratan sulfate and heparan sulfate. In the case of the supplement, sulfate is the anion of the salt. In the case of the above GAGs, sulfate is present as an ester. Also, there is no glucosamine sulfate in chondroitin sulfate (source: PDRhealth).

2 Acetamido 2 Deoxy D Glucose

D-Glucose, 2-(acetylamino)-2-deoxy-: ACTIVE