process for the production of a new lymphokins (luke 2) and use of lk 2 for the production of a pharmaceutical praeparates

摘要

A monoclonal antibody specific to the lymphokine, and its production is disclosed. The novel lymphokine LK2 is a glycoprotein with a molecular weight of 20,000+/-2,000 daltons; isoelectric point pI, 6.2+/-0.3; electrophoretic mobility Rf, 0.29+/-0.02; cytotoxic on L 929 cells and substantially not growth-inhibitive on KB cell. The lymphokine significantly inhibits the growth of malignant human tumors in vivo. The monoclonal antibody may be of IgM or IgG class, and neutralizes specifically the cytotoxic activity of the lymphokine. Combined use of LK 2 with chemotherapeutic agents such as alkylating agents, metabolic antagonists, antioncotic antibiotics and plant alkaloids enhances greatly the antioncotic effect of the chemotherapeutics.