SEP 19, 2019 7:00 AM PDT

Seeing through the murine heart - quantitative 3D assessment of myocardial ischemia/reperfusion injury and response

Sponsored by: Imaris
Speaker

Abstract
DATE:  September 19, 2019
TIME:   7:00am PDT, 10:00am EDT, 3:00pm BST
 
Cardioprotection by salvage of the infarct-affected myocardium is an unmet yet highly desired therapeutic goal. To develop new dedicated therapies, experimental myocardial ischemia/reperfusion (I/R) injury would require methods to simultaneously characterize extent and localization of the damage and the ensuing inflammatory responses in whole hearts over time. Here we present a three-dimensional (3D), simultaneous quantitative investigation of key I/R injury-components by combining bleaching-augmented solvent-based non-toxic clearing (BALANCE) using ethyl cinnamate (ECi) with light sheet fluorescence microscopy. This allows structural analyses of fluorescence-labeled I/R hearts with exceptional detail. We discover and 3D-quantify distinguishable acute and late vascular I/R damage zones. These contain highly localized and spatially structured neutrophil infiltrates that are modulated upon cardiac healing. Our model demonstrates that these characteristic I/R injury patterns can detect the extent of damage even days after the ischemic index event hence allowing the investigation of long-term recovery and remodeling processes.
 
Learning Objectives:
  • Insights into anatomical structure of the murine heart in 3D
  • Immune response following ischemia/reperfusion injury on an organ level
  • Quantitative light sheet fluorescence microscopy (LSFM) in highly autofluorescent organs
  • Examples for semi-manual tracing, spot-function and filament model to quantify 3D LSFM data
 
 
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SEP 19, 2019 7:00 AM PDT

Seeing through the murine heart - quantitative 3D assessment of myocardial ischemia/reperfusion injury and response

Sponsored by: Imaris

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