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The morphology of basement membrane formation
European Journal of Cell Biology
|December 1, 1981
Summary
This study introduces a murine tumor model for investigating basement membrane (BM) formation. The tumor
Area of Science:
- Cell Biology
- Biochemistry
- Histology
Background:
- Basement membranes (BMs) are critical extracellular matrices.
- Understanding BM formation is vital for tissue regeneration and disease research.
Purpose of the Study:
- To characterize a transplantable murine tumor model that produces basement membranes.
- To investigate the cellular and extracellular components involved in BM formation.
Main Methods:
- Immunofluorescence microscopy to identify BM components.
- Electron microscopy to visualize cellular structures and extracellular matrix.
- Utilizing different fixation techniques to study BM morphology.
Main Results:
- The tumor's intercellular substance (ICS) contains collagen type IV, fibronectin, laminin, and a BM proteoglycan (BM-1), resembling normal tissue BM.
- BM-producing cells exhibit extensive rough endoplasmic reticulum (RER) and Golgi complexes.
- BM material is secreted via prosecretion and granules; its morphology is fixation-dependent.
Conclusions:
- The established murine tumor model is suitable for studying basement membrane formation.
- Cellular machinery for BM production involves significant RER and Golgi activity.
- Fixation techniques influence the observed ultrastructure of the extracellular BM material.