Top quality PSGAG

1． What is polysulfated glycosaminoglycan (PSGAG)?

PSGAG is a highly sulfated derivative of glycosaminoglycan (GAG). Its basic skeleton is similar to naturally occurring GAG, especially chondroitin sulfate. The core structure is composed of repeated disaccharide units (usually glucuronic acid and N-acetylglucosamine).

2.What is the core mechanism of action of PSGAG in treating osteoarthritis?

1. Inhibition of cartilage degrading enzymes: Effectively inhibits the activity of key matrix metalloproteinases (such as MMP-1, MMP-3, MMP-13) and aggrecanases (ADAMTS-4, ADAMTS-5), preventing them from decomposing the collagen and proteoglycan core proteins of cartilage.

2. Stimulate cartilage matrix synthesis: Promote the synthesis of proteoglycans (such as aggrecans) and type II collagen in chondrocytes, which helps with the repair and maintenance of cartilage matrix.

3. Anti inflammatory effect: Inhibits the production and activity of pro-inflammatory factors (such as IL-1 β, TNF - α), reduces inflammation in joints, and thus alleviates pain and swelling.

3： Why is the "polysulfate" characteristic of PSGAG crucial for its biological activity?

1. Enzyme inhibition: Strong negative charge enables it to bind more effectively to positively charged enzyme active sites (such as the zinc ion binding domain of MMPs), competitively or conformationally inhibiting the activity of these enzymes.

2. Combining growth factors/cytokines: can bind and regulate the activity of important growth factors (such as FGF, TGF - β) and cytokines in the joint, affecting cell signaling.

1. Interaction with matrix components: Enhance the interaction with other positively charged components (such as collagen) in the cartilage matrix, which may stabilize the matrix structure.

4： Advantages of PSGAG

1. High bioavailability: Injection administration (especially intra-articular) avoids the problems of insufficient oral absorption and low bioavailability, and can directly deliver effective drug concentrations to the joints.

2. The effect may be faster and more direct: directly acting on the target tissue, theoretically the effect is more significant.