Lytic versus stimulatory synapse in cytotoxic T lymphocyte/target cell interaction: manifestation of a dual activation threshold.

Activation of biological functions in T lymphocytes is determined by the molecular dynamics occurring at the T cell/opposing cell interface. In the present study, a central question of cytotoxic T lymphocyte (CTL) biology was studied at the single-cell level: can two distinct activation thresholds f...

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Үндсэн зохиолчид: Faroudi, M, Utzny, C, Salio, M, Cerundolo, V, Guiraud, M, Müller, S, Valitutti, S
Формат: Journal article
Хэл сонгох:English
Хэвлэсэн: 2003
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author Faroudi, M
Utzny, C
Salio, M
Cerundolo, V
Guiraud, M
Müller, S
Valitutti, S
author_facet Faroudi, M
Utzny, C
Salio, M
Cerundolo, V
Guiraud, M
Müller, S
Valitutti, S
author_sort Faroudi, M
collection OXFORD
description Activation of biological functions in T lymphocytes is determined by the molecular dynamics occurring at the T cell/opposing cell interface. In the present study, a central question of cytotoxic T lymphocyte (CTL) biology was studied at the single-cell level: can two distinct activation thresholds for cytotoxicity and cytokine production be explained by intercellular molecular dynamics between CTLs and targets? In this study, we combine morphological approaches with numerical analysis, which allows us to associate specific patterns of calcium mobilization with different biological responses. We show that CTLs selectively activated to cytotoxicity lack a mature immunological synapse while exhibiting a low threshold polarized secretion of lytic granules and spike-like patterns of calcium mobilization. This finding is contrasted by fully activated CTLs, which exhibit a mature immunological synapse and smooth and sustained calcium mobilization. Our results indicate that intercellular molecular dynamics and signaling characteristics allow the definition of two activation thresholds in individual CTLs: one for polarized granule secretion (lytic synapse formation) and the other for cytokine production (stimulatory synapse formation).
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spelling oxford-uuid:8375b29b-6e40-4252-9f03-e0caf7c4c72f2022-03-26T21:44:16ZLytic versus stimulatory synapse in cytotoxic T lymphocyte/target cell interaction: manifestation of a dual activation threshold.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:8375b29b-6e40-4252-9f03-e0caf7c4c72fEnglishSymplectic Elements at Oxford2003Faroudi, MUtzny, CSalio, MCerundolo, VGuiraud, MMüller, SValitutti, SActivation of biological functions in T lymphocytes is determined by the molecular dynamics occurring at the T cell/opposing cell interface. In the present study, a central question of cytotoxic T lymphocyte (CTL) biology was studied at the single-cell level: can two distinct activation thresholds for cytotoxicity and cytokine production be explained by intercellular molecular dynamics between CTLs and targets? In this study, we combine morphological approaches with numerical analysis, which allows us to associate specific patterns of calcium mobilization with different biological responses. We show that CTLs selectively activated to cytotoxicity lack a mature immunological synapse while exhibiting a low threshold polarized secretion of lytic granules and spike-like patterns of calcium mobilization. This finding is contrasted by fully activated CTLs, which exhibit a mature immunological synapse and smooth and sustained calcium mobilization. Our results indicate that intercellular molecular dynamics and signaling characteristics allow the definition of two activation thresholds in individual CTLs: one for polarized granule secretion (lytic synapse formation) and the other for cytokine production (stimulatory synapse formation).
spellingShingle Faroudi, M
Utzny, C
Salio, M
Cerundolo, V
Guiraud, M
Müller, S
Valitutti, S
Lytic versus stimulatory synapse in cytotoxic T lymphocyte/target cell interaction: manifestation of a dual activation threshold.
title Lytic versus stimulatory synapse in cytotoxic T lymphocyte/target cell interaction: manifestation of a dual activation threshold.
title_full Lytic versus stimulatory synapse in cytotoxic T lymphocyte/target cell interaction: manifestation of a dual activation threshold.
title_fullStr Lytic versus stimulatory synapse in cytotoxic T lymphocyte/target cell interaction: manifestation of a dual activation threshold.
title_full_unstemmed Lytic versus stimulatory synapse in cytotoxic T lymphocyte/target cell interaction: manifestation of a dual activation threshold.
title_short Lytic versus stimulatory synapse in cytotoxic T lymphocyte/target cell interaction: manifestation of a dual activation threshold.
title_sort lytic versus stimulatory synapse in cytotoxic t lymphocyte target cell interaction manifestation of a dual activation threshold
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