Massachusetts Institute of Technology

Herman S Eisen

Mark S Pasternack

Antibodies, nucleic acid sequences, and methods for inhibition of lysis for a novel serine esterase produced by both murine and human cytotoxic T lymphocytes. The serine esterase has an apparent molecular weight of approximately 28,000-31,000, as determined by SDS gel electrophoresis under reducing conditions, and trypsin-like activity. Inhibition of the esterase correlates with inhibition of the cells' cytolytic activity. Specific inhibition of the serine esterase is useful as a method for immunosuppression as well as for the inhibition of cytolytic activity of T lymphocytes, both in vivo and in vitro. The genes encoding the murine and human serine esterase are homologous.

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Waban, MA, United States of America

Herman S Eisen