Affordable Access

Publisher Website

Dynamics, Structure, and Assembly of the Basement Membrane in Developing Salivary Glands Revealed by an Exogenous EGFP-Tagged Nidogen Probe.

  • Kadoya, Yuichi1, 2
  • Futaki, Sugiko3, 4
  • Shimono, Chisei4, 5
  • Kimura, Taketoshi1, 2
  • Sekiguchi, Kiyotoshi4, 6
  • 1 Laboratory of Anatomical Science.
  • 2 Regenerative Medicine and Cell Design Research Facility, Kitasato University School of Allied Health Sciences.
  • 3 Department of Anatomy, Osaka Medical and Pharmaceutical University.
  • 4 Division of Extracelluar Matrix Biochemistry.
  • 5 Nippi Research Institute of Biomatrix, Nippi Inc.
  • 6 Division of Matrixome Research and Application, Institute for Protein Research, Osaka University.
Published Article
Microscopy (Oxford, England)
Publication Date
Aug 11, 2022
DOI: 10.1093/jmicro/dfac040
PMID: 35950724


Most epithelial tissues rapidly become complex during embryonic development while being surrounded by the basement membrane (BM). Thus, the BM shape is thought to change dramatically as the epithelium grows, but the underlying mechanism is not yet clear. Nidogen-1 is ubiquitous in the BM and binds to various other BM components, including laminin and type IV collagen. To elucidate the behavior of the BM during epithelial morphogenesis, we attempted to live-label the developing BM with recombinant human nidogen-1 fused to a green fluorescent protein (hNid1-EGFP). Submandibular glands of mouse embryos were cultured in glass-bottomed dishes and incubated in media containing hNid1-EGFP. Subsequent confocal microscopy clearly visualized the BMs surrounding the epithelial end buds. On three-dimensional reconstruction from Z-series confocal sections, the epithelial BM was observed as a thin sheet that expanded continuously around the entire epithelial basal surface. Because the explants continued to grow well in the presence of hNid1-EGFP, time-lapse confocal microscopy was performed to follow the dynamics of the BM. We found that the epithelial BM is an adaptive structure that deforms in accordance with the rapid shape changes of the developing epithelium. Furthermore, hNid1-EGFP was found to be incorporated differently into the epithelial BM compared with that reported for fibronectin or type IV collagen, suggesting that individual BM components assemble in different ways to form the BM. © The Author(s) 2022. Published by Oxford University Press on behalf of The Japanese Society of Microscopy. All rights reserved. For permissions, please e-mail: [email protected].

Report this publication


Seen <100 times