Cited by 65Effects of Radiation ExposureRadiation Therapy and DosimetrySpaceflight effects on biology

Analysis of white blood cell counts in mice after gamma- or proton-radiation exposure

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Maks, Casey J., Wan, X. Steven, Ware, Jeffrey H., Romero-Weaver, Ana L., Sanzari, Jenine K., Wilson, Jolaine M., Rightnar, Steve, Wroe, Andrew J. +4 more·2011·Radiation Research

Abstract

In the coming decades human space exploration is expected to move beyond low-Earth orbit. This transition involves increasing mission time and therefore an increased risk of radiation exposure from solar particle event (SPE) radiation. Acute radiation effects after exposure to SPE radiation are of prime importance due to potential mission-threatening consequences. The major objective of this study was to characterize the dose-response relationship for proton and γ radiation delivered at doses up to 2 Gy at high (0.5 Gy/min) and low (0.5 Gy/h) dose rates using white blood cell (WBC) counts as a biological end point. The results demonstrate a dose-dependent decrease in WBC counts in mice exposed to high- and low-dose-rate proton and γ radiation, suggesting that astronauts exposed to SPE-like radiation may experience a significant decrease in circulating leukocytes.

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Crossref · 10.1667/rr2413.1

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  • Radiation combined with spaceflight environment stressors decreases survival in animal studies.

    “Results from animal studies examining the synergistic effects of radiation combined with spaceflight environment stressors (i.e., microgravity, environmental constraints, emotional stress) show increased susceptibility to infection, delayed wound healing and decreased survival [73,74,75].”
  • Radiation combined with spaceflight environment stressors delays wound healing in animal studies.

    “Results from animal studies examining the synergistic effects of radiation combined with spaceflight environment stressors (i.e., microgravity, environmental constraints, emotional stress) show increased susceptibility to infection, delayed wound healing and decreased survival [73,74,75].”
  • Radiation combined with spaceflight environment stressors (microgravity, environmental constraints, emotional stress) increases susceptibility to infection in animal studies.

    “Results from animal studies examining the synergistic effects of radiation combined with spaceflight environment stressors (i.e., microgravity, environmental constraints, emotional stress) show increased susceptibility to infection, delayed wound healing and decreased survival [73,74,75].”
  • A reduction in peripheral blood granulocyte counts was observed after radiation.

    “A reduction in the peripheral blood granulocyte counts was observed after radiation similar to that described previously [26], [49], [50].”
  • Radiation (2 Gy), either gamma or proton, results in a significant decrease in granulocyte counts in peripheral blood and other organs.

    “Radiation (2 Gy) either gamma or proton results in a significant decrease in granulocyte counts in peripheral blood (Figure 8 and supplemental Figure 1) and other organs [26], [49], [50].”

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Authors
Maks, C. J., Wan, X. S., Ware, J. H., Romero-Weaver, A. L., Sanzari, J. K., Wilson, J. M., Rightnar, S., Wroe, A. J., Koss, P., Gridley, D. S., Slater, J. M., & Kennedy, A. R.
Affiliations
  • University of Pennsylvania (US)
  • Loma Linda University (US)
  • University of Wollongong (AU)
Venue
Radiation Research
Published
2011-08
Volume
176
Issue
2
Pages
170-176
ISSN
  • 0033-7587 (ISSN-L)
  • 1938-5404
OpenAlex
W2168524360
Cited by
65
References
17
Citations by year
2025: 3 · 2024: 2 · 2023: 3 · 2022: 4 · 2021: 6 · 2020: 2 · 2019: 5 · 2018: 6 · 2017: 8 · 2016: 3 · 2015: 6 · 2014: 7 · 2013: 6 · 2012: 1
FWCI
4.15
Type
journal article
Language
en
Open access
Locations
  • Radiation Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Research Online (University of Wollongong) (submittedVersion)
  • BioOne Complete (BioOne) (submittedVersion)
Funders
  • National Aeronautics and Space Administration
  • National Space Biomedical Research Institute
  • National Cancer Institute (T32CA009677)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Effects of Radiation Exposure
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Radiation Therapy and Dosimetry
  • Health Sciences › Medicine › Physiology › Spaceflight effects on biology
Keywords
white blood cell count, gamma radiation, proton radiation, solar energetic particle events, space radiation, dose-response relationship, dose rate dependence, leukocyte depletion, acute radiation effects, astronaut health, mice
MeSH terms
Animals, Dose-Response Relationship, Radiation, Female, Gamma Rays, Leukocyte Count, Leukocytes, Mice, Inbred ICR, Protons, Relative Biological Effectiveness, Endpoint Determination, Mice

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