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Related Experiment Videos

A fluorometric viability assay for single human and rat islets.

N J London1, H Contractor, S P Lake

  • 1Department of Surgery, Leicester University, United Kingdom.

Hormone and Metabolic Research. Supplement Series
|January 1, 1990
PubMed
Summary

A new microfluorometric assay accurately measures dead cells in isolated islets of Langerhans. This rapid, objective method uses fluorescein diacetate and propidium iodide for precise viability assessment in human and rat islet research.

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Area of Science:

  • Cell Biology
  • Biotechnology
  • Endocrinology

Background:

  • Assessing cell viability is crucial in islet transplantation and research.
  • Existing methods for islet viability can be time-consuming or less objective.

Purpose of the Study:

  • To develop and validate a rapid, accurate, and objective microfluorometric assay for determining the viability of isolated human and rat islets of Langerhans.

Main Methods:

  • Utilized fluorescein diacetate (live cells, green fluorescence) and propidium iodide (dead cells, red fluorescence).
  • Measured fluorescence intensity from single islets using specific excitation and emission wavelengths with photometry.
  • Corrected all measurements for background fluorescence.

Main Results:

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  • The microfluorometric assay demonstrated high correlation (r = 0.99, P < 0.001) with traditional cell counting methods after islet dissociation.
  • The assay accurately quantifies the proportion of dead cells within individual human and rat islets.

Conclusions:

  • The developed microfluorometric assay is a reliable tool for assessing islet viability.
  • This method offers a significant advancement in the objective measurement of cell death in isolated islets.