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Flow Cytometry01:23

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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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Cytoplasm01:16

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The cytoplasm consists of organelles and a framework of protein scaffolds called the cytoskeleton suspended in an aqueous solution, the cytosol. The cytosol is a rich broth of water, ions, salts, and various organic molecules.
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Cytokinesis segregates a cell’s chromosomes and organelles into its daughter cells. Organelles divide and grow prior to cell division but cannot be synthesized de novo; therefore, cells must receive at least one copy of each organelle to survive. Currently, many of the details of how the organelles are distributed are not yet fully elucidated.
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Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
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Cytoplasmic Immunoglobulin Vs. DNA Analysis by Flow Cytometry.

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  • 1Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, AR, USA. dalapat@uams.edu.

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|May 26, 2018
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Flow cytometry (FCM) detects DNA content in neoplastic plasma cells, distinguishing them from normal cells. This method rapidly assesses DNA abnormalities and cell cycle, identifying monoclonal populations with high sensitivity.

Keywords:
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Area of Science:

  • Hematology
  • Clinical Pathology
  • Immunology

Background:

  • Neoplastic plasma cells in conditions like multiple myeloma exhibit monotypic cytoplasmic immunoglobulin.
  • Distinguishing neoplastic from normal plasma cells is crucial for diagnosis and monitoring.
  • Flow cytometry offers a rapid method for cellular analysis.

Purpose of the Study:

  • To evaluate the utility of flow cytometry (FCM) for detecting DNA content in neoplastic plasma cells.
  • To differentiate neoplastic plasma cells with monotypic cytoplasmic immunoglobulin from normal polytypic plasma cells.
  • To assess DNA aneuploidy and proliferative activity in plasma cell populations.

Main Methods:

  • Utilizing a flow cytometric (FCM) method comparing cytoplasmic immunoglobulin (CIg) and DNA content.
  • Employing dual-parameter analysis to identify specific cell populations.
  • Measuring cellular DNA content to determine diploidy or aneuploidy.

Main Results:

  • FCM effectively detects DNA content in neoplastic plasma cells expressing monotypic CIg.
  • The method clearly distinguishes neoplastic plasma cells from normal polytypic plasma cells.
  • Abnormal DNA content (aneuploidy) and proliferative activity are rapidly measurable.
  • Monoclonal plasma cell populations can be identified at frequencies as low as 0.1-0.05%.

Conclusions:

  • Flow cytometry is a sensitive and specific method for identifying and characterizing neoplastic plasma cells.
  • FCM analysis of DNA content and cytoplasmic immunoglobulin aids in diagnosing plasma cell disorders.
  • The technique allows for rapid assessment of DNA abnormalities and proliferative capacity, crucial for patient management.