Anti-tumor efficacy of lymphokine-activated killer cells and recombinant interleukin 2 in vivo: direct correlation between reduction of established metastases and cytolytic activity of lymphokine-activated killer cells
Our previous studies demonstrated that the incubation of human peripheral blood lymphocytes or murine splenocytes in recombinant interleukin 2 (RIL 2) resulted in the generation of lymphokine-activated killer (LAK) cells capable of lysing a broad spectrum of fresh tumors in short-term chromium-release assays. Moreover, injections of LAK cells plus RIL 2 were highly effective in eliminating established 3 day metastases in the lung and liver. We have examined several parameters to define whether or not the cytolytic activity of LAK cells as measured in vitro correlated directly with the in vivo anti-tumor efficacy of adoptively transferred LAK cells. LAK cells plus RIL 2 could mediate marked reductions of established pulmonary metastases in mice rendered T cell deficient by adult thymectomy and lethal, total body irradiation followed by reconstitution with T cell-depleted bone marrow and spleen cells. Thus there was no requirement for additional T lymphocytes of host origin for successful therapy with adoptively transferred LAK cells plus RIL 2. Fresh splenocytes depleted of T cells by anti-Thy-1.2 monoclonal antibody plus complement generated LAK cells that were as highly lytic to fresh tumor in vitro and were as effective in reducing established pulmonary metastases as those generated from untreated or complement-treated splenocytes. Thus, the precursor to LAK cells with anti-tumor activity in vitro and in vivo did not express the Thy-1 antigenic marker. In contrast, treatment of LAK effector cells (those generated from a 3-day incubation of fresh, normal splenocytes in RIL 2) with anti-Thy-1.2 antibody plus complement reduced or abolished their in vitro cytolytic activity.
- Research Organization:
- National Cancer Institute, Bethesda, MD
- OSTI ID:
- 5650996
- Journal Information:
- J. Immunol.; (United States), Journal Name: J. Immunol.; (United States) Vol. 10; ISSN JOIMA
- Country of Publication:
- United States
- Language:
- English
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMAL CELLS
ANIMALS
ANTIBODIES
ANTIGENS
BIOLOGICAL MATERIALS
BLOOD
BLOOD CELLS
BODY FLUIDS
BONE MARROW CELLS
CELL DIFFERENTIATION
COMPLEMENT
CONNECTIVE TISSUE CELLS
EXTERNAL IRRADIATION
GROWTH FACTORS
IMMUNOTHERAPY
IN VIVO
IRRADIATION
LETHAL IRRADIATION
LEUKOCYTES
LYMPHOCYTES
LYMPHOKINES
LYSIS
MAMMALS
MATERIALS
MEDICINE
METASTASES
MICE
MITOGENS
MONOCLONAL ANTIBODIES
ORGANIC COMPOUNDS
PROTEINS
RODENTS
SOMATIC CELLS
SPLEEN CELLS
SURGERY
THERAPY
THYMECTOMY
TUMOR CELLS
VERTEBRATES
WHOLE-BODY IRRADIATION