Substratum for cell culture and a method for culturing and isolating cells using same
First Claim
1. In a mammalian cell culture containing a substratum and nutrient medium, the improvement comprising a substratum composed of collagen which has been modified by chemical means to increase the charge of the collagen to a degree sufficient to enhance mammalian cell attachment.
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Accused Products
Abstract
A substratum for cell culture which comprises a chemically modified collagen rich in either positive or negative charges when under culture conditions. The substratum is prepared by modifying the amino groups or carboxyl groups of collagen. The chemically modified collagen enhances the adherence and proliferation of animal cells much more actively than unmodified collagen in the presence or absence of bovine fetus serum. The cultured animal cells can be detached efficiently from the chemically modified collagen. This allows for highly selective isolation and recovery of the cultured animal cells which can be accomplished without incurring any injury from the chemically modified collagen.
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Citations
11 Claims
- 1. In a mammalian cell culture containing a substratum and nutrient medium, the improvement comprising a substratum composed of collagen which has been modified by chemical means to increase the charge of the collagen to a degree sufficient to enhance mammalian cell attachment.
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8. An improved method for culturing and isolating mammalian cells wherein the cells are cultured under conventional culture conditions, according to the type of cell being cultured, and collagen is used as a substratum for attaching the cells during culturing, the improvement comprising:
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adhering the mammalian cells to collagen which has been modified by chemical means to increase the charge of the collagen, and incubating the mammalian cells and treating the animal cells with bivalent cation chelating agent to isolate and recover the cells. - View Dependent Claims (9, 10, 11)
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Specification