Premium
Local but no systemic immunomodulation by intraperitoneal treatment of advanced ovarian cancer with autologous T lymphocytes re‐targeted by a bi‐specific monoclonal antibody
Author(s) -
Lamers Cor H.J.,
Bolhuis Reinder L.H.,
Warnaar Sven O.,
Stoter Gerrit,
Gratama Jan W.
Publication year - 1997
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/(sici)1097-0215(19971009)73:2<211::aid-ijc9>3.0.co;2-z
Subject(s) - immunotherapy , medicine , ex vivo , ovarian cancer , ovarian carcinoma , monoclonal antibody , immunology , cd3 , cancer immunotherapy , in vivo , cancer research , immune system , antibody , cancer , cd8 , biology , microbiology and biotechnology
We have reported a 27% overall anti‐tumor response using i.p. immunotherapy of advanced ovarian carcinoma with autologous, ex vivo expanded, T lymphocytes re‐targeted with bi‐specific monoclonal antibody OC/TR, combined with soluble OC/TR and low‐dose recombinant interleukin‐2 (IL‐2). This treatment had no effect on extraperitoneal disease. Therefore we studied in 13 patients whether this immunotherapeutic protocol resulted only in local or also in systemic immunomodulation. The phenotype of the ex vivo expanded lymphocytes was mainly CD3 + , 4 − , 8 + , 16 − , 56 − . Their OC/TR‐re‐targeted cytolytic activity against Igrov‐1 ovarian‐carcinoma cells was approximately as high in responders as in non‐responders. Following most therapeutic cycles, the immunophenotype of lymphocytes recovered from the peritoneal fluid was similar to that of the infused T cells ( i.e., mainly CD3 + , 4 − , 8 + ) and they were coated with OC/TR. However, cytolytic activity of the recovered lymphocytes against Igrov‐1 cells was low in direct assays, and only slightly increased after additional in vitro re‐targeting with OC/TR. Systemically, the i.p. immunotherapy resulted in a transient lymphopenia lasting for about 7 days, low ( i.e., 5 to 13 ng/ml) serum concentrations of free, functional OC/TR, and very weak coating of circulating T lymphocytes with OC/TR. These peripheral‐blood T lymphocytes did not exert OC/TR‐re‐targeted cytolytic activity. Thus, locoregional OC/TR‐re‐targeted cellular immunotherapy resulted in substantial local immunomodulation and anti‐tumor effects but virtually no systemic immunomodulation. Int. J. Cancer 73:211–219, 1997. © 1997 Wiley‐Liss, Inc.