| 摘要 |
A method of selecting a monoclonal cell colony (18) that secretes a product of interest is described. The method comprises providing a plurality of cell culture spaces (10). Each cell culture space (10) has a respective assessment surface (14). Each assessment surface (14) is provided with a first binding agent (20, 30, 42) that is immobilised on the assessment surface (14). A suspension of cells is plated in the plurality of cell culture spaces (10) so that at least some of the cell culture spaces (10) are plated with a single viable cell. The cells are incubated in a growth medium (16) in the cell culture spaces (10) to cause replication of the cells. At least some of the cells secrete a product of interest (22, 32, 44). A second binding agent (24, 34, 46) is provided in the cell culture spaces (10). At least initially, the second binding agent (24, 34, 46) is not immobilised. Each of the first and second binding agents binds to the product of interest (22, 32, 44) so that secretion of the product of interest by cells in any one of the cell culture spaces (10) leads to a complex comprising the first binding agent (20, 30, 42), the product of interest (22, 32, 44) and the second binding agent (24, 34, 46) forming at the corresponding assessment surface (14) of the cell culture space (10). The method also includes assessing at least some of the cell culture spaces (10) for presence of the second binding agent at the assessment surface (14) of the cell culture space. The method further includes determining for at least some of the cell culture spaces whether the cell culture space contains a single cell colony that is derived from a single cell. A cell culture space is selected using the assessment and the determination. The selected cell culture space contains a single monoclonal cell colony which secretes the product of interest. |
