Cell culture system, cell culture method, cell culture vessel and method for manufacturing cell culture vessel

1. A cell culture method comprising:

emitting light of which light intensity can be regulated;

preparing a cell incubator comprising a photocatalytic film consisting of titanium oxide and in which: a culture medium is injected; titanium in the titanium oxide reacts with water in the culture medium, by irradiated light, to form hydroxyl groups on the surface of the photocatalytic film; and the degree of hydrophilicity of the photocatalytic film surface varies depending on the light intensity of the light irradiated;

culturing cells on a surface of the photocatalytic film consisting of titanium oxide whose degree of hydrophilicity varies depending on the light intensity;

measuring the activity of cells cultured on the photocatalytic film irradiated with the light; and

associating the light intensity with the activity of the cells.

2. The cell culture method of claim 1 , further comprising extracting a value of the light intensity that maximizes the activity of the cells.

3. The cell culture method of claim 2 , further comprising irradiating the photocatalytic film with light having the light intensity of the extracted value and culturing the cells on a surface of the photocatalytic film.

4. The cell culture method of claim 1 , wherein the proliferation rate of the cells is measured in measuring the activity of the cells.

5. The cell culture method of claim 1 , wherein the growth rate of the cells is measured in measuring the activity of the cells.

6. The cell culture method of claim 1 , wherein the amount of secreted material indicative of the activity of the cells is measured in measuring the activity of the cells.

7. The cell culture method of claim 1 , wherein the gene expression level indicative of the activity of the cells is measured in measuring the activity of the cells.