Flow cytometric analysis of tetanus toxin binding to neuroblastoma cells.

Abstract:

:A neuroblastoma cell line was assessed for its capacity to bind tetanus toxin (TT) by using immunofluorescence and flow cytometry to analyze cells on a single cell basis. A clone of Neuro 2a, N2AB-1, was shown to bind variable amounts of TT per cell and this binding could be saturated by increasing doses of the toxin. Toxin binding was specific for neuronal cells, as the non-neuronal cell line, C6 glioma, bound negligible amounts of toxin. Variability of immunofluorescence staining was due in part to the increase in size of N2AB-1 cells as they progress through the cell cycle as measured by cell surface densities of toxin binding and DNA levels by propidium iodide (PI) staining. When N2AB-1 cells were treated with exogenous gangliosides for 24 h, cells were induced to sprout neurites and cell growth was inhibited. Analysis of DNA histograms indicated that ganglioside treatment caused more cells to appear in G0G1 of the cell cycle than that seen for untreated controls. Upon cytometric analysis of TT binding to ganglioside treated cells, it was apparent that treatment stimulated all cells to bind TT in larger amounts per cell than that seen with untreated N2AB-1 cells. These data suggest that TT binding and, therefore, toxin receptors are constant in density throughout the cell cycle of these neuroblastoma cells and that exogenous gangliosides can cause differentiation followed by increased toxin binding.

journal_name

J Cell Physiol

authors

Notter MF,Leary JF

doi

10.1002/jcp.1041250317

subject

Has Abstract

pub_date

1985-12-01 00:00:00

pages

476-84

issue

3

eissn

0021-9541

issn

1097-4652

journal_volume

125

pub_type

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