Novel cell culture supports with particular properties, and production thereof
First Claim
1. A process for continuously producing two-dimensional (2D) supports endowed with particular properties for anchorage-dependent cell culture (ADC), comprising at least the following steps in succession:
- continuously producing rolls of polymer film with a thickness of 35 μ
or less and with a density in the range 0.9 to 1.25 g/cm3 from granules of a given polymer;
activating said polymer film using any means for generating reactive groups, in particular radicals and/or peroxide, hydroperoxide or amine functions;
producing covalent grafts between the activated polymer film and a polymer, a copolymer or a macromolecule of interest the property of which is desired, said grafting being achieved by immersing the film in a solution of monomer, copolymerisation being initiated by free radicals created by activation under β
irradiation, the immersion time being directly correlated to the desired thickness of the polymer grafted onto the film;
if necessary, washing to eliminate monomers that are not consumed and not fixed to the film, followed by drying the grafted film;
cutting the grafted polymer film by continuous punching, the size of the punches being selected as a function of the desired size of the 2D supports.
2 Assignments
0 Petitions
Accused Products
Abstract
A method for continuously obtaining two-dimensional microcarrier beads (2D-MS) displaying particular functional characteristics for anchorage-dependent cell culture (CAD), includes a succession of steps which consist in: continuously producing polymer film rolls from a specific polymer granules; activating the polymer film by generating reactive groups; covalent grafting between the activated polymer film and a polymer, copolymer or a macromolecule of interest; if required, washing to eliminate the monomers which have not been consumed and fixed on the film, followed by drying the grafted film; and finally cutting the grafted polymer film by continuous punching, the size of the punch being selected according to that of the dimension desired for the two-dimensional microcarrier beads.
-
Citations
21 Claims
-
1. A process for continuously producing two-dimensional (2D) supports endowed with particular properties for anchorage-dependent cell culture (ADC), comprising at least the following steps in succession:
-
continuously producing rolls of polymer film with a thickness of 35 μ
or less and with a density in the range 0.9 to 1.25 g/cm3 from granules of a given polymer;
activating said polymer film using any means for generating reactive groups, in particular radicals and/or peroxide, hydroperoxide or amine functions;
producing covalent grafts between the activated polymer film and a polymer, a copolymer or a macromolecule of interest the property of which is desired, said grafting being achieved by immersing the film in a solution of monomer, copolymerisation being initiated by free radicals created by activation under β
irradiation, the immersion time being directly correlated to the desired thickness of the polymer grafted onto the film;
if necessary, washing to eliminate monomers that are not consumed and not fixed to the film, followed by drying the grafted film;
cutting the grafted polymer film by continuous punching, the size of the punches being selected as a function of the desired size of the 2D supports. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18)
-
-
16. A device for continuous preparation of a 2D-MS support endowed with particular properties, prepared using the process defined above and employing covalent fixing of a polymer, a copolymer or of biological macromolecules on a substrate constituted by a polymer film, said device comprising:
-
a system for unwinding/winding a polymer film, the film being entrained at a selected speed for each step;
activation, grafting, punching;
an electron accelerator arranged to continuously activate the rolls of film;
a receptacle for containing the solution of monomers, polymers or macromolecules to be grafted, into which the polymer film continuously passes at a predetermined speed entrained by the winding/unwinding system;
a cutting tool for punching the film as it is unwound. - View Dependent Claims (19, 20, 21)
-
Specification