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Department of Pathology and Cell Biology, Thomas Jefferson University, Philadelphia, PA 19107.
We have established a continuous cell line from the Engelbreth-Holm-Swarm (EHS) tumor, a transplantable murine neoplasm that has been extensively utilized to investigate basement membrane constituents. The EHS-derived cells, designated BAM cells, have been subcultured for over 40 passages and have maintained phenotypic and biological properties of the parent EHS tumor cells. BAM cells have retained an epithelioid morphology and the ability to induce EHS-like tumors in mice. Biochemical and immunochemical studies demonstrated that BAM cells synthesize laminin A and B chains, collagen type IV, entactin and the basement membrane specific heparan sulfate proteoglycan. Interestingly, the proteoglycan synthesized by BAM cells was a hybrid molecule containing 2-3 heparan sulfate chains of 25-35 kDa and 1 chondroitin sulfate chain of approximately 17 kDa attached to a 400-kDa protein core. This cell line will be useful to investigations concerning biosynthesis of basement membrane constituents and will be a valuable source of extracellular matrix for testing cellular properties such as attachment, locomotion and differentiation.
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