Collagen type XI is a component of hyaline cartilage consisting of alpha 1(XI), alpha 2(XI), and alpha 3(XI) chains; with 5-10% of the total collagen content, it is a minor but significant component next to type II collagen, but its function and precise localization in cartilaginous tissues is still unclear. Owing to the homology of the alpha 3(XI) and alpha 1(II) collagen chains, attempts to p...

The articular and growth plate cartilages of osteochondrotic pigs were examined and compared with those from clinically normal animals. Both types of osteochondrotic cartilage showed considerable localised thickening apparently due to a lack of ossification. Histological examination of cartilage lesions demonstrated a breakdown in the normal pattern of chondrocyte maturation. Articular cartilag...

Molecular mechanisms controlling the assembly of cartilage-specific types II, IX and XI collagens into a heteropolymeric network of uniformly thin, unbanded fibrils are not well understood, but collagen XI has been implicated. The present study on cartilage from the homozygous chondrodysplasia (cho/cho) mouse adds support to this concept. In the absence of alpha1(XI) collagen chains, thick, ban...

Modeling of the collagen 1(XI) amino propeptide (NPP) domain was performed to better understand how dimerization and glycosaminoglycan binding are coordinated. The program MODELLER was used to generate a homology model of collagen 1(XI) NPP domain based on the crystal structure of the closely related NC4 domain of collagen 1 (IX) (PDB:2UUR) to a root mean square deviation (rmsd) of 0.785 Å r...

Collagens are a group of extracellular matrix proteins with essential functions for skin integrity. Anchoring fibrils are made of type VII collagen (Col7) and link different skin layers together: the basal lamina and the underlying connective tissue. Col7 has a central collagenous domain and two noncollagenous domains located at the N and C terminus (NC1 and NC2), respectively. A cysteine-rich ...

The glycoprotein (GP)-Ib-IX-V receptor complex has recently been reported to signal through a pathway similar to that used by the collagen receptor GPVI, with a critical role described for the Fc receptor gamma-chain. The evidence for this was based in part on studies with the GPIbalpha-selective snake venom toxin, alboaggregin-A. In the present study, it is reported that alboaggregin-A has act...

The glycoprotein (GP)–Ib-IX-V receptor complex has recently been reported to signal through a pathway similar to that used by the collagen receptor GPVI, with a critical role described for the Fc receptor g-chain. The evidence for this was based in part on studies with the GPIbaselective snake venom toxin, alboaggregin-A. In the present study, it is reported that alboaggregin-A has activity at ...

Several t ransplantable tumors and chick embryonic tissues were cultured in collagen-coated cellulose sponge. The growth obtained in this matr ix was compared with that obtained in cellulose sponge alone and in collagen sponge alone. The tumors included a mouse mammary adenoeareinoma (C3HBA), a squaincus cell carcinoma of the mouse cervix (D-98), a mouse ascites hepatoma (Sato A H #134) , a rat...