In vitro and in vivo tumour localisation with a monoclonal antibody directed against a membrane antigen on the human hepatocellular carcinoma cell line PLC/PRF/5.

Abstract:

:A monoclonal antibody, designated K-PLC1, has been produced to a tumour-associated antigen on the cell membrane of the PLC/PRF/5 cell line. Using an indirect immunofluorescence technique this antibody produced membrane staining of three hepatocellular carcinoma (HCC) cell lines and it has positively stained 10 of 11 human HCC biopsy specimens. In vitro, 125I-labelled K-PLC1 binds specifically to PLC/PRF/5 cells, as shown by competitive inhibition experiments. Tumours derived from the PLC/PRF/5 cell line were grown in nude mice and groups of tumour-bearing animals were injected with either [125I]K-PLC1 or [125I]mouse IgG, and then killed at 1, 4 or 7 days post injection. Bound radioactivity was counted in a variety of solid organs. Tumour:liver ratios for K-PLC1 were greater than those for mouse IgG at each time point, the differences being greatest on day 4 (ratio K-PLC1 4.4 +/- 0.93, ratio mouse IgG 1.53 +/- 0.60, mean +/- SD, P less than 0.05). The amount of [125I]K-PLC1 bound was greater in the tumour than in any other solid organ, the differences again being maximal on day four. Blood pool radioactivity however remained high throughout the study period. We conclude that anti-HCC monoclonal antibodies may be of value as immunodiagnostic and immunotherapeutic agents in human HCC.

journal_name

J Hepatol

journal_title

Journal of hepatology

authors

Dunk AA,Brown D,Weidmann K,Thomas HC

doi

10.1016/s0168-8278(87)80009-0

subject

Has Abstract

pub_date

1987-02-01 00:00:00

pages

52-61

issue

1

eissn

0168-8278

issn

1600-0641

pii

S0168-8278(87)80009-0

journal_volume

4

pub_type

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