Patent ID: 7736856

Claim:
A method of screening a catechin or antibody to determine whether the catechin or antibody has the same pharmacological effect as that of epigallocatechin gallate, which comprises the steps of qualitatively or quantitatively determining the degree of binding of epigallocatechin gallate and the catechin or antibody to a full length 67 kDa laminin receptor expressed on the cell surface of cancer cells, determining that the degree of binding of the catechin or antibody to the full length 67 kDa laminin receptor expressed on the cell surface of cancer cells is higher than that of binding of the epigallocatechin gallate to the full length 67 kDa laminin receptor expressed on the cell surface of cancer cells, and determining that the catechin or antibody displaces the binding of epigallocatechin gallate to the full length 67 kDa laminin receptor expressed on the cell surface of cancer cells, wherein displacement of the binding of epigallocatechin gallate by the catechin or antibody indicates that the screened catechin or antibody has the same pharmacological effect as that of epigallocatechin gallate, wherein the pharmacological effect of epigallocatechin gallate is a growth-inhibiting effect on cancer cells.