当前位置： SCI文献检索 > JOURNAL OF IMMUNOLOGICAL METHODS期刊下所有文献 > Flow cytometric analysis of protein-tyrosine phosphorylation in peripheral T cell subsets. Application to healthy and HIV-seropositive subjects.

Flow cytometric analysis of protein-tyrosine phosphorylation in peripheral T cell subsets. Application to healthy and HIV-seropositive subjects.

Abstract：

:This paper describes an improved method for detecting tyrosine phosphorylation levels in T cell subsets by flow cytometry early after CD3 crosslinking stimulation. It consists in introducing gentle paraformaldehyde fixation between CD3 crosslinking in cold conditions and the shift to 37 degrees C, which activates downstream signalling machinery. We used the combined properties of monoclonal antibodies for stimulating cells and for detecting surface markers to analyze protein-tyrosine phosphorylation levels in T cells subsets following stimulations which mimic physiological activation. Overall data obtained in healthy subjects, using two- or three-color immunofluorescence, indicated that: (1) most CD3 positive cells phosphorylate tyrosine substrates following CD3 crosslinking stimulation and (2) helper cells phosphorylate tyrosine to a slightly better extent than cytotoxic cells after CD3 crosslinking. Nevertheless, the two subsets follow similar kinetic patterns and tend to retain a homogeneous profile. Processing of samples from HIV-seropositive patients showed heterogeneous phosphorylation levels in both subsets, when compared to normal donors. This assay should, in the future, lead to easy and rapid exploration of the signal transduction pathway in different subsets of T cells under normal and pathological conditions.

journal_name

J Immunol Methods

journal_title

Journal of immunological methods

authors

Vuillier F,Scott-Algara D,Cayota A,Siciliano J,Nugeyre MT,Dighiero G

doi

10.1016/0022-1759(95)00103-h

subject

Has Abstract

pub_date

1995-09-11 00:00:00

pages

43-56

issue

1

eissn

0022-1759

issn

1872-7905

pii

002217599500103H

journal_volume

185

pub_type

杂志文章

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