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Intercellular accumulation of type V collagen fibrils in accordance with cell aggregation.

Authors
  • Kihara, Takanori
  • Imamura, Yasutada
  • Takemura, Yukitoshi
  • Mizuno, Kazunori
  • Adachi, Eijiro
  • Hayashi, Toshihiko
Type
Published Article
Journal
Journal of biochemistry
Publication Date
Nov 01, 2008
Volume
144
Issue
5
Pages
625–633
Identifiers
DOI: 10.1093/jb/mvn109
PMID: 18776206
Source
Medline
License
Unknown

Abstract

We reported previously that human fibroblasts form clumps when cultured on a dish coated with reconstituted type V collagen fibrils. Essentially all the type V collagen fibrils, initially coated on the dish, were recovered in the cell clumps that had eventually formed during the culture. We interpreted that type V collagen fibrils adhere to cells more strongly than to the dish and are detached by cell movements. In this study, type V collagen was suspended with fibroblasts to examine the fate of the type V collagen fibrils and to determine whether the fibrils affect the behaviour of the cells directly adherent to the dish. The added type V collagen accumulated in the intercellular space concomitantly with the local aggregation of fibroblasts. scanning electron microscope examination indicated that type V collagen fibrils were found in the vicinity of cells in cultures without ascorbic acid where essentially no collagen secretion takes place. These results indicate that type V collagen forms fibrils and the fibrils are accumulated in the intercellular spaces. The accumulated type V collagen fibrils work as a cementing material for cell clump formation. This phenomenon is discussed in relation to the possible involvement of type V collagen fibrils in tissue organization.

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