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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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Ovarian Cancer Detection Using Photoacoustic Flow Cytometry
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Photoacoustic flow cytometry.

Ekaterina I Galanzha1, Vladimir P Zharov

  • 1Phillips Classic Laser and Nanomedicine Laboratories, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA.

Methods (San Diego, Calif.)
|July 4, 2012
PubMed
Summary

New in vivo flow cytometry uses advanced photoacoustic techniques for noninvasive, label-free cell detection. This technology enables early diagnosis of diseases like cancer and cardiovascular disorders, potentially preventing metastasis and strokes.

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Area of Science:

  • Biomedical Engineering
  • Optical Imaging
  • Cellular Biology

Background:

  • Conventional flow cytometry requires invasive cell extraction, altering cell properties and preventing in vivo studies.
  • Long-term monitoring of cells in their native environment is crucial for understanding disease progression and treatment efficacy.

Purpose of the Study:

  • To review advances in next-generation in vivo flow cytometry for noninvasive, label-free, or targeted cell detection.
  • To highlight the application of photoacoustic (PA) detection techniques and integrated multimodal imaging for cellular analysis.

Main Methods:

  • Utilized photoacoustic (PA) detection, multispectral lasers, and novel plasmonic nanoprobes for in vivo cell imaging.
  • Incorporated techniques such as magnetic enrichment, time-of-flight velocity measurement, and PA spectral analysis.
  • Integrated PA, photothermal (PT), fluorescent, and Raman methods for comprehensive cellular and molecular analysis.

Main Results:

  • Demonstrated ultrasensitive detection of normal and rare abnormal cells (e.g., circulating tumor cells, pathogens, clots) in various vasculatures.
  • Discovered that procedures like palpation or surgery can increase circulating tumor cell release, elevating metastasis risk.
  • Showcased theranostics combining PA diagnosis and PT therapy for targeted eradication of cancer cells, infections, and clots.

Conclusions:

  • In vivo flow cytometry offers a breakthrough platform for early diagnosis of cancer, infection, and cardiovascular disorders.
  • Portable fiber-based devices enable dynamic studies of blood rheology and clot formation, aiding in personalized therapy.
  • This technology has the potential to prevent severe health outcomes like metastasis, sepsis, stroke, and heart attack through timely intervention.