Responses of mouse lymphocytes to extracellular ATP: II. Extracellular ATP causes cell type-dependent lysis and dna fragmentation

Paola Zanovello, Vincenzo Bronte, Antonio Rosato, Paola Pizzo, Francesco Di Virgilio

Research output: Contribution to journalArticle

136 Citations (Scopus)

Abstract

Extracellular ATP (ATPo) caused dose-dependent lysis of YAC-1 and P-815 mouse tumor cells. This event, assessed by 51Cr release, was accompanied by sustained depolarization of the plasma membrane potential and Ca2+ influx. Plasma membrane depolarization and Ca2+ influx occurred within a few seconds of ATPo addition to both cell types, whereas 51Cr was released without apparent lag in YAC-1 cells and after 2 h in P-815 cells. Furthermore, a rise in [Ca2+]i was required for ATPo-dependent lysis of YAC-1 but not P-815 cells. In P-815 cells, ATPo caused an early and [Ca2+]i-independent DNA fragmentation that occurred at lower nucleotide concentrations than those required to trigger 51Cr release. Instead in YAC-1 cells very low concentrations of ATPo caused early lysis (ED50 for lysis about 200 μM) accompanied by only barely detectable DNA fragmentation. Previous studies disclosed that lymphokine-activated killer cells are fully resistant to the membrane-perturbing effects of ATPo. We show that lymphokine-activated killer cells also do not undergo DNA fragmentation even in the presence of high ATPo concentrations. This study complements previous observations on the lytic effects of ATPo and shows that this nucleotide can also cause DNA fragmentation, one of the earliest target cell alterations observed during CTL-mediated lysis.

Original languageEnglish
Pages (from-to)1545-1550
Number of pages6
JournalJournal of Immunology
Volume145
Issue number5
Publication statusPublished - Sep 1 1990

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Adenosine Triphosphate
Lymphocytes
DNA Fragmentation
Lymphokine-Activated Killer Cells
Nucleotides
Cell Membrane
Membrane Potentials
Membranes
Neoplasms

ASJC Scopus subject areas

  • Immunology

Cite this

Responses of mouse lymphocytes to extracellular ATP : II. Extracellular ATP causes cell type-dependent lysis and dna fragmentation. / Zanovello, Paola; Bronte, Vincenzo; Rosato, Antonio; Pizzo, Paola; Di Virgilio, Francesco.

In: Journal of Immunology, Vol. 145, No. 5, 01.09.1990, p. 1545-1550.

Research output: Contribution to journalArticle

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AU - Di Virgilio, Francesco

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