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Targeted Killing of Colorectal Cancer Cell Lines by a Humanised IgG1 Monoclonal Antibody That Binds to Membrane-bound Carcinoembryonic Antigen

Overview
Journal Br J Cancer
Specialty Oncology
Date 2008 Mar 20
PMID 18349843
Citations 13
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Abstract

The distribution of carcinoembryonic antigen (CEA) in colorectal cancer (CRC) differs from that in normal colorectal tissue, being found on all borders of the cell membrane and hence enabling access to intravenous antibody, making CEA a good target for antibody-based therapy. The distinctive anti-CEA antibody, PR1A3, binds only membrane-bound CEA. Humanised PR1A3 (hPR1A3) was assessed both in vitro cytotoxicity and binding assays with colorectal cancer cell lines expressing varying levels of CEA. Human peripheral blood mononuclear cells (PBMCs) and purified natural killer (NK) cells were used as effectors. The in vitro assays demonstrated hPR1A3 CEA-specific binding and antibody-dependent and CEA-specific killing of human colorectal cancer cell lines by human PBMCs. The effect increased with increasing concentration of antibody and surface CEA, and was lost by using the parent murine IgG1 PR1A3. Killing was also blocked by antibody to the Fc-gammaIIIA receptor. Purified human NK cells were effective at much lower effector:target ratios than unfractionated PBMCs, indicating that NK cells were the main mediators of hPR1A3-based CEA-specific killing. The results support the development of hPR1A3 for therapy of colorectal cancer.

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References
1.
Allum W, Macdonald F, Anderson P, FIELDING J . Localisation of gastrointestinal cancer with a 131 I labelled monoclonal antibody to CEA. Br J Cancer. 1986; 53(2):203-10. PMC: 2001340. DOI: 10.1038/bjc.1986.36. View

2.
Olszewski A, Grossbard M . Empowering targeted therapy: lessons from rituximab. Sci STKE. 2004; 2004(241):pe30. DOI: 10.1126/stke.2412004pe30. View

3.
Boyum A . Separation of leukocytes from blood and bone marrow. Introduction. Scand J Clin Lab Invest Suppl. 1968; 97:7. View

4.
Gold P, Freedman S . DEMONSTRATION OF TUMOR-SPECIFIC ANTIGENS IN HUMAN COLONIC CARCINOMATA BY IMMUNOLOGICAL TOLERANCE AND ABSORPTION TECHNIQUES. J Exp Med. 1965; 121:439-62. PMC: 2137957. DOI: 10.1084/jem.121.3.439. View

5.
Moretta A, Tambussi G, Ciccone E, Pende D, Melioli G, Moretta L . CD16 surface molecules regulate the cytolytic function of CD3CD16+ human natural killer cells. Int J Cancer. 1989; 44(4):727-30. DOI: 10.1002/ijc.2910440429. View