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. 1993 Jan;78(1):166–169.

Cytotoxic activity of human lymphocytes against differentiated intestinal tumour cell lines.

R Anelli 1, R Placido 1, Y Sambuy 1, S Bach 1, A Di Massimo 1, V Colizzi 1
PMCID: PMC1421771  PMID: 8436403

Abstract

The natural killer (NK) and lymphokine-activated killer (LAK) cytotoxic activity of human peripheral blood lymphocytes (PBL) against various human tumour cell lines from intestinal origin (WIDR, HT29, Caco-2) has been investigated. The differentiated Caco-2 cells were then used as a model to investigate the cytotoxic activity against enterocyte-like target cells. Caco-2 were seeded on polycarbonate filters and maintained in culture for at least 15 days to allow the differentiation and formation of tight junctions. The integrity of tight junctions was assayed by measuring [3H]mannitol flux from apical to basolateral compartment. Cytotoxic analysis showed that both differentiated and undifferentiated Caco-2 cells were similarly susceptible to NK and LAK activity. The capacity of cytotoxic lymphocytes to kill enterocyte-like cells with intact junctional complex may suggest a direct role of cytotoxic lymphocytes in causing intestinal lesions under inflammatory conditions.

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Selected References

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