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Evaluation of Caspase‐3 Activity During Apoptosis with Fluorescence Lifetime‐Based Cytometry Measurements and Phasor Analyses

Caspase‐3 is a well‐described protease with many roles that impact the fate of a cell. During apoptosis, caspase‐3 acts as an executioner caspase with important proteolytic functions that lead to the final stages of programmed cell death. Owing to this key role, caspase‐3 is exploited intracellularl...

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Autores principales: Nichani, Kapil, Li, Jianzhi, Suzuki, Miho, Houston, Jessica P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley & Sons, Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7738394/
https://www.ncbi.nlm.nih.gov/pubmed/32790129
http://dx.doi.org/10.1002/cyto.a.24207
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author Nichani, Kapil
Li, Jianzhi
Suzuki, Miho
Houston, Jessica P.
author_facet Nichani, Kapil
Li, Jianzhi
Suzuki, Miho
Houston, Jessica P.
author_sort Nichani, Kapil
collection PubMed
description Caspase‐3 is a well‐described protease with many roles that impact the fate of a cell. During apoptosis, caspase‐3 acts as an executioner caspase with important proteolytic functions that lead to the final stages of programmed cell death. Owing to this key role, caspase‐3 is exploited intracellularly as a target of control of apoptosis for therapeutic outcomes. Yet the activation of caspase‐3 during apoptosis is challenged by other roles and functions (e.g., paracrine signaling). This brief report presents a way to track caspase‐3 levels using a flow cytometer that measures excited state fluorescence lifetimes and a signal processing approach that leads to a graphical phasor‐based interpretation. An established Förster resonance energy transfer (FRET) bioprobe was used for this test; the connected donor and acceptor fluorophore is cleavable by caspase‐3 during apoptosis induction. With the cell‐by‐cell decay kinetic data and phasor analyses we generate a caspase activation trajectory, which is used to interpret activation throughout apoptosis. When lifetime‐based cytometry is combined with a FRET bioprobe and phasor analyses, enzyme activation can be simplified and quantified with phase and modulation data. We envision extrapolating this approach to high content screening, and reinforce the power of phasor approaches with cytometric data. Analyses such as these can be used to cluster cells by their phase and modulation “lifetime fingerprint” when the intracellular fluorescent probe is utilized as a sensor of enzyme activity. © 2020 The Authors. Cytometry Part A published by Wiley Periodicals LLC on behalf of International Society for Advancement of Cytometry.
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spelling pubmed-77383942020-12-16 Evaluation of Caspase‐3 Activity During Apoptosis with Fluorescence Lifetime‐Based Cytometry Measurements and Phasor Analyses Nichani, Kapil Li, Jianzhi Suzuki, Miho Houston, Jessica P. Cytometry A Brief Report Caspase‐3 is a well‐described protease with many roles that impact the fate of a cell. During apoptosis, caspase‐3 acts as an executioner caspase with important proteolytic functions that lead to the final stages of programmed cell death. Owing to this key role, caspase‐3 is exploited intracellularly as a target of control of apoptosis for therapeutic outcomes. Yet the activation of caspase‐3 during apoptosis is challenged by other roles and functions (e.g., paracrine signaling). This brief report presents a way to track caspase‐3 levels using a flow cytometer that measures excited state fluorescence lifetimes and a signal processing approach that leads to a graphical phasor‐based interpretation. An established Förster resonance energy transfer (FRET) bioprobe was used for this test; the connected donor and acceptor fluorophore is cleavable by caspase‐3 during apoptosis induction. With the cell‐by‐cell decay kinetic data and phasor analyses we generate a caspase activation trajectory, which is used to interpret activation throughout apoptosis. When lifetime‐based cytometry is combined with a FRET bioprobe and phasor analyses, enzyme activation can be simplified and quantified with phase and modulation data. We envision extrapolating this approach to high content screening, and reinforce the power of phasor approaches with cytometric data. Analyses such as these can be used to cluster cells by their phase and modulation “lifetime fingerprint” when the intracellular fluorescent probe is utilized as a sensor of enzyme activity. © 2020 The Authors. Cytometry Part A published by Wiley Periodicals LLC on behalf of International Society for Advancement of Cytometry. John Wiley & Sons, Inc. 2020-08-25 2020-12 /pmc/articles/PMC7738394/ /pubmed/32790129 http://dx.doi.org/10.1002/cyto.a.24207 Text en © 2020 The Authors. Cytometry Part A published by Wiley Periodicals LLC on behalf of International Society for Advancement of Cytometry. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
spellingShingle Brief Report
Nichani, Kapil
Li, Jianzhi
Suzuki, Miho
Houston, Jessica P.
Evaluation of Caspase‐3 Activity During Apoptosis with Fluorescence Lifetime‐Based Cytometry Measurements and Phasor Analyses
title Evaluation of Caspase‐3 Activity During Apoptosis with Fluorescence Lifetime‐Based Cytometry Measurements and Phasor Analyses
title_full Evaluation of Caspase‐3 Activity During Apoptosis with Fluorescence Lifetime‐Based Cytometry Measurements and Phasor Analyses
title_fullStr Evaluation of Caspase‐3 Activity During Apoptosis with Fluorescence Lifetime‐Based Cytometry Measurements and Phasor Analyses
title_full_unstemmed Evaluation of Caspase‐3 Activity During Apoptosis with Fluorescence Lifetime‐Based Cytometry Measurements and Phasor Analyses
title_short Evaluation of Caspase‐3 Activity During Apoptosis with Fluorescence Lifetime‐Based Cytometry Measurements and Phasor Analyses
title_sort evaluation of caspase‐3 activity during apoptosis with fluorescence lifetime‐based cytometry measurements and phasor analyses
topic Brief Report
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7738394/
https://www.ncbi.nlm.nih.gov/pubmed/32790129
http://dx.doi.org/10.1002/cyto.a.24207
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