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Detection of Protease Activity by Fluorescent Peptide Zymography
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Cell In Situ Zymography: Imaging Enzyme-Substrate Interactions.

Aastha Chhabra1,2, Vibha Rani3

  • 1Peptide and Proteomics Division, Defence Institute of Physiology and Allied Sciences (DIPAS), DRDO, Lucknow Road, Timarpur, 110054, Delhi, India.

Methods in Molecular Biology (Clifton, N.J.)
|June 14, 2017
PubMed
Summary

Cell in situ zymography detects matrix metalloproteinase (MMP) activity directly within cells. This sensitive method allows for precise localization and quantification of enzyme function in cell cultures.

Keywords:
CytochemistryDye-quenched caseinEnzymesFluorescent assayImage analysis/quantificationIn situ zymographyMatrix metalloproteinases (MMPs)Proteolytic activity

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Enzymology

Background:

  • Zymography is a standard technique for detecting enzyme activity.
  • In situ zymography (ISZ) extends this to localize enzyme activity within tissue samples.
  • Matrix metalloproteinases (MMPs) are crucial enzymes involved in various cellular processes.

Purpose of the Study:

  • To describe a protocol for detecting matrix metalloproteinase (MMP) activity directly within cells.
  • To adapt histological in situ zymography for cell culture applications, termed 'Cell in situ Zymography'.
  • To provide a sensitive and quantifiable method for assessing enzyme activity at the cellular level.

Main Methods:

  • Utilized H9c2 cardiomyoblasts as a model system.
  • Adapted histological in situ zymography techniques for cell-based assays.
  • Developed a protocol for 'Cell in situ Zymography' to detect enzyme activity in position.

Main Results:

  • Successfully established a method for detecting matrix metalloproteinase (MMP) activity in cells.
  • Demonstrated the sensitivity and quantifiability of the Cell in situ Zymography technique.
  • Validated the 'on site/in position' assessment of enzyme functional activity.

Conclusions:

  • Cell in situ Zymography is a simple, sensitive, and quantifiable method for assessing enzyme activity in cells.
  • This technique allows for the precise localization and estimation of enzyme-substrate interactions within cell cultures.
  • The developed protocol offers a valuable tool for studying enzyme function in cellular contexts.