Non-Triple Helical Form of Type IV Collagen ?1 Chain.

ABSTRACT: Type IV collagen with a triple-helical structure composed of three ? chains is a major component of basement membrane. Previously, we reported that non-triple helical form of type IV collagen ?1 chain (NTH?1(IV)) was isolated from human placenta and the culture media of human cells. In the present study, we report on the localization of NTH ?1(IV) with a monoclonal antibody #370, exclusively reactive for the nascent chain, in the rabbit tissues. The staining was found on the basement membrane of blood vessels, of endomysium, of nerve, and of kidney but not on epithelial basement membrane. In a rabbit angiogenic model, #370 antibody staining was exclusively observed in neovascular tip region of endothelial cells, where no staining with anti-type IV collagen antibody was seen. Distinct localizations suggest that NTH?1(IV) is produced and stably deposited in endothelial cells and the surroundings under physiological conditions with some physiological roles in relation to the dynamics of vascular system.

SUBMITTER: Sugiyama H 

PROVIDER: S-EPMC4945737 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature