Antibody-dependent cell cytotoxicity to breast cancer targets despite inhibitory KIR signaling.

Full Abstract

BACKGROUND:
Natural killer (NK) cells express killer immunoglobulin-like (KIR) inhibitory receptors, which recognize certain HLA class I molecules (KIR ligands), and stimulatory receptors such as FcgammaRIII. The purpose of this study was to test the possible influence of inhibitory KIR signaling on antibody-dependent cell cytotoxicity (ADCC) mediated by allogeneic NK cells against breast cancer targets.

MATERIALS AND METHODS:
The cytotoxic activity of volunteer donor NK cells against the cell lines SKBR-3, T47D and MCF-7, which have high, low and no HER2 gene amplification, respectively, were studied. Both cell lines and donors were assigned to the C1 or C2 superfamily, defined by the structure of the HLA-Cw molecule.

RESULTS:
It was found that ADCC mediated by allogeneic NK cells occurred despite combinations of NK cells and breast cancer targets predicted to trigger inhibitory KIR signaling.

CONCLUSION:
We suggest that adoptive immunotherapy with allogeneic NK cells and trastuzumab may be an effective combination against breast cancer targets.

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Author information

Author/s: Stein, Mark N (MN); Shin, James (J); Gudzowaty, Oksana (O); Bernstein, Andrew M (AM); Liu, Johnson M (JM);

Affiliation: Mount Sinai School of Medicine, New York, NY 10029, USA.

Journal and publication information

Publication Type: Journal Article

Journal: Anticancer research (Anticancer Res), published in Greece. (Language: eng)

Reference: -2006 May-Jun; vol 26 (issue 3A) : pp 1759-63

Dates: Created 2006/07/07; Completed 2006/08/24;

PMID: 16827104, status: MEDLINE (last retrieval date: 12/26/2008)

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Antibodies, Monoclonal - pharmacology
Antibody-Dependent Cell Cytotoxicity
Breast Neoplasms - genetics; immunology; therapy
Cell Line, Tumor
Gene Amplification
HLA-C Antigens - immunology
Humans

Humans
Immunotherapy, Adoptive
Killer Cells, Natural - immunology
Monomeric GTP-Binding Proteins - immunology
Polymerase Chain Reaction
Receptor, erbB-2 - genetics
Signal Transduction

Associated Chemicals: Antibodies, Monoclonal (0) ; HLA-C Antigens (0) ; trastuzumab (0) ; Receptor, erbB-2 (EC 2.7.1.112) ; GEM protein, human (EC 3.6.1.-) ; Monomeric GTP-Binding Proteins (EC 3.6.5.2)

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