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Reduced gravity evaluation of potential spaceflight-compatible flow cytometer technology.

Brian Crucian1, Clarence Sams

  • 1Wyle Laboratories, Space Physiology and Countermeasures Department, Houston, Texas 77058, USA.

Cytometry. Part B, Clinical Cytometry
|June 1, 2005
PubMed
Summary

A novel, miniaturized flow cytometer successfully performed cell analysis in reduced gravity, paving the way for spaceflight medicine and research. This space-compatible instrument offers a new tool for in-flight biological studies.

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Area of Science:

  • Biomedical Engineering
  • Space Medicine
  • Analytical Chemistry

Background:

  • Spaceflight research necessitates advanced tools for in-flight medicine and biological studies.
  • Traditional flow cytometers are unsuitable for spaceflight due to size, weight, power, and fluid requirements.
  • Recent technological advancements enable the development of spaceflight-compatible cytometers.

Purpose of the Study:

  • To evaluate a novel, miniaturized flow cytometer for its suitability in reduced gravity environments.
  • To assess the performance of this spaceflight-compatible cytometer using bead-based precision, photomultiplier tube linearity, and leukocyte immunophenotyping.

Main Methods:

  • A novel, miniaturized flow cytometer was modified for reduced gravity operation.
  • The cytometer was tested onboard the NASA KC-135 aircraft during parabolic flights, simulating zero gravity.
Keywords:
NASA Center JSCNASA Discipline Life Sciences Technologies

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  • Performance was assessed by comparing reduced gravity data with ground-based controls and a reference cytometer.

    • Main Results:

    • The novel flow cytometer operated effectively in reduced gravity, yielding data comparable to ground-based controls.
    • Leukocyte immunophenotype data collected during reduced gravity were indistinguishable from ground and reference data.
    • While instrument precision showed a slight increase in reduced gravity, it remained suitable for most applications.

    Conclusions:

    • This study demonstrates the first real-time flow cytometry data acquisition during zero gravity.
    • The evaluated cytometer technology, with further modifications, can form the basis for an operational spaceflight-compatible flow cytometer.
    • This development holds significant potential for advancing in-flight medical diagnostics and biological research in space.