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Related Concept Videos

Flow Cytometry01:23

Flow Cytometry

The development of flow cytometry techniques began in 1934 with initial attempts by Andrew Moldavan, a bacteriologist who counted the cells in a flowing capillary system. Moldavan pumped cells through a capillary tube focused under a microscope for visualization. The invention of photometry allowed the measurement of differentially-stained cells, and Louis Kamentsky developed the first multiparameter flow cytometer in 1965 to identify and count the cancer cells in cervical tissue specimens.
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Related Experiment Video

Updated: Jun 4, 2026

Quantitative Immunofluorescence Assay to Measure the Variation in Protein Levels at Centrosomes
09:39

Quantitative Immunofluorescence Assay to Measure the Variation in Protein Levels at Centrosomes

Published on: December 20, 2014

Quantitative fluorescence cytometry.

R F Vogt1, A Schwartz, G E Marti

  • 1Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA.

Methods in Molecular Medicine
|February 12, 2011
PubMed
Summary
This summary is machine-generated.

Quantitative fluorescence cytometry (QFCM) translates subjective "dim" and "bright" fluorescence staining terms into objective mass units. This advancement aids in interpreting flow cytometry results for distinguishing normal and neoplastic leukocytes.

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Last Updated: Jun 4, 2026

Quantitative Immunofluorescence Assay to Measure the Variation in Protein Levels at Centrosomes
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Area of Science:

  • Hematology
  • Immunology
  • Biotechnology

Background:

  • Flow cytometry (FCM) uses fluorescence staining to identify leukocyte phenotypes.
  • Traditional FCM analysis relies on subjective classifications like 'dim' or 'bright' positive cells.
  • These classifications originate from early fluorescence microscopy observations.

Purpose of the Study:

  • To introduce quantitative fluorescence cytometry (QFCM) as a method for objective FCM data interpretation.
  • To enable the translation of subjective fluorescence intensity terms into measurable units.
  • To enhance the understanding and application of FCM in distinguishing normal from neoplastic leukocytes.

Main Methods:

  • Developing a framework for quantitative fluorescence cytometry (QFCM).
  • Translating qualitative fluorescence intensity descriptors ('dim', 'bright') into quantitative mass units.
  • Validating the QFCM approach for analyzing FCM data.

Main Results:

  • QFCM allows for the objective quantification of fluorescence signals from stained cells.
  • The translation of 'dim' and 'bright' into mass units is now feasible, though not yet exact.
  • QFCM provides a more precise method for interpreting FCM staining patterns.

Conclusions:

  • Quantitative fluorescence cytometry (QFCM) offers a more objective approach to FCM data analysis.
  • This method improves the ability to distinguish between normal and neoplastic leukocytes.
  • Further refinement of QFCM technical details will enhance its clinical utility.