M17-1A-, C17-1A- and CSF25-mediated Antibody-dependent Cell-mediated Cytotoxicity in Patients with Advanced Cancer
Overview
Authors
Affiliations
The anti-tumour antibody-dependent cell-mediated cytotoxicity (ADCC) capacity of the conventional antibody m17-1A was compared with its chimerised analogue c17-1A and a newer chimeric antibody, cSF25, specific for colonic adenocarcinoma. The results (AUC units +/- s.e.m., control versus cancer) show that mononuclear cells from patients with adenocarcinoma mediate ADCC as efficiently as those from controls for m17-1A (143 +/- 14 vs 153 +/- 14), c17-1A (174 +/- 16 vs 189 +/- 14) cSF25 (215 +/- 18 vs 237 +/- 13) and effectors and targets alone (57 +/- 9 vs 51 +/- 8). Both chimeric antibodies mediated ADCC more effectively than m17-1A with cSF25 consistently producing the highest lysis. Furthermore, more efficient ADCC was found to correspond with monocyte activation examined flow cytometrically. The results (mean channel fluorescence) show that HLA-DR expression is increased with c17-1A (1436 +/- 200) and cSF25 (2252 +/- 298) above that observed when effectors and targets were incubated alone (1157 +/- 168) or with m17-1A (1286 +/- 170). Similarly, interleukin 2 receptor (IL-2R) expression (percentage of positive cells) was augmented in the presence of m17-1A (15 +/- 3), c17-1A (14 +/- 3) and cSF25 (25 +/- 3) when compared with no antibody (9 +/- 2). We discuss the possibility that the superior ADCC activity of chimeric antibodies, especially cSF25, may be due to increased monocyte activation.
Nishihara T, Sawada T, Yamamoto A, Yamashita Y, Ho J, Kim Y Jpn J Cancer Res. 2000; 91(8):817-24.
PMID: 10965023 PMC: 5926427. DOI: 10.1111/j.1349-7006.2000.tb01019.x.
Sawada T, Nishihara T, Yamamoto A, Teraoka H, Yamashita Y, Okamura T Jpn J Cancer Res. 1999; 90(10):1179-86.
PMID: 10595748 PMC: 5926001. DOI: 10.1111/j.1349-7006.1999.tb00693.x.
Pullyblank A, Guillou P, Monson J Br J Cancer. 1995; 72(3):601-6.
PMID: 7669568 PMC: 2033875. DOI: 10.1038/bjc.1995.380.