| 摘要 |
PATENT 6757 The development of cytolytic activity of lymphocytes can be potentiated by contacting the lymphocytes with antibody reactive with CD28 receptor, such as 9.3 monoclonal antibody. The cytolytic activity thus potentiated is CD3 heteroconjugate-independent since targeting with a CD3 anti-target compound is not required. The development of cytolytic activity can be further potentiated by also contacting the lymphocytes with antibody reactive with anti-CD2 antibody or immobilized antibody to the CD3 receptor, or by also contacting the lymphocytes with interleukin-2. The CD28 receptor may be aggregated on the surface of the lymphocytes, as by crosslinking the antibody reactive to it on the surface of the lymphocytes. This crosslinking can be by the use of a second antibody reactive with the anti-CD28 antibody. Another aspect of the present invention is a method of adoptive therapy for treating cancer in a subject comprising the steps of: (1) contacting lymphocytes in vitro with an antibody reactive with CD28 receptor to potentiate the development of cytolytic activity of the lymphocytes to produce lymphocytes having cytolytic activity that is CD3 heteroconjugate independent; and (2) introducing the cytolytic lymphocytes into a subject to kill cancer cells. 6757APL.2
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