How is type 2 collagen produced?
1–3 Type II collagen is synthesized as a procollagen molecule with noncollagenous amino and carboxy extension peptides, by articular chondrocytes which represent the only living elements within hyaline cartilage.
Where does collagen type II occur?
Type II collagen adds structure and strength to the connective tissues that support the body’s muscles, joints, organs, and skin. Type II collagen is found primarily in cartilage, a tough but flexible tissue that makes up much of the skeleton during early development.
How is collagen synthesis regulated?
Ascorbic acid markedly stimulates collagen synthesis without affecting synthesis of other proteins. This effect appears to be unrelated to its cofactor roles for hydroxylation of lysine and proline. Glucocorticoids at microM concentration specifically inhibit collagen synthesis.
What is the difference between Type 1 and Type 2 collagen?
Type 1 collagen is the most abundant collagen in mammals and found in skin, tendons, ligaments, and bones. Type 2 is the most abundant collagen in the cartilage. This is the key difference between type 1 and 2 collagen.
What is type 2 collagen called?
Type II collagen is the basis for articular cartilage and hyaline cartilage, formed by homotrimers of collagen, type II, alpha 1 chains. It makes up 50% of all protein in cartilage and 85–90% of collagen of articular cartilage.
What is synthesis of collagen?
The process of collagen synthesis occurs mainly in the cells of fibroblasts which are specialized cells with the main function of synthesizing collagen and stroma. Collagen synthesis occurs both intracellularly and extracellularly.
Is type II collagen abundant?
The major constituents of this hyaline cartilage are collagens and proteoglycans, the most abundant protein being type II collagen.
What affects collagen synthesis?
The regulation of collagen synthesis is controlled at several levels. A number of growth factors including TGFβs and FGFs have strong effects on collagen gene expression. TGF-β stimulates both type I and III collagens. Excess TGF-β1 has been found in the dermis of chronic venous ulcers and may play a role in fibrosis.
What is type 2 collagen used for?
Collagen type II is used for osteoarthritis. It is also used for other types of joint and muscle pain, but there is no good scientific evidence to support these other uses.
Does collagen type 2 work?
A few studies have evaluated the efficacy of native type II collagen in osteoarthritis. In animal trials, it has been found effective in reducing arthritic pain [10–12]. In human trials, native type II collagen has been found effective in increasing functional status and reducing pain [13, 14].
What is collagen type II?
Collagen type II is a homotrimer formed by α1 (ll) chains. The human collagen type II gene is located in chromosome 12 in region 12q13 (Solomon et al., 1985). It is formed by 54 exons in both the human and mouse and spans 28.9 kilobases (kb) (Metsaranta et al., 1991).
How to regulate Type IX and Type II collagen synthesis in chondrocytes?
Coordinate regulation of type IX and type II collagen synthesis during growth of chick chondrocytes in retinoic acid or 5-bromo-2′-deoxyuridine Chondrocytes isolated from 15-day-old embryonic chick sterna were cultured as monolayers for 7 days in control medium or in medium supplemented with retinoic acid or 5-bromo-2′-deoxyuridine.
Is type II collagen transcriptional or translationally regulated?
Type II collagen is regulated transcriptional but type I translationally in mesenchyme of chick limb buds.
How is the level of Type II collagen in the supernatant estimated?
The level of type II collagen in the culture supernatant is estimated from its ability to inhibit the binding of the first antibody to the antigen-coated well.