Cited by 132Spaceflight effects on biologyImmunotoxicology and immune responsesStress Responses and Cortisol

How does spaceflight affect the acquired immune system?

Open access
Akiyama, Taishin, Horie, Kenta, Hinoi, Eiichi, Hiraiwa, Manami, Kato, Akihisa, Maekawa, Yoichi, Takahashi, Akihisa, Furukawa, Satoshi·2020·npj Microgravity

Abstract

The impact of spaceflight on the immune system has been investigated extensively during spaceflight missions and in model experiments conducted on Earth. Data suggest that the spaceflight environment may affect the development of acquired immunity, and immune responses. Herein we summarize and discuss the influence of the spaceflight environment on acquired immunity. Bone marrow and the thymus, two major primary lymphoid organs, are evidently affected by gravitational change during spaceflight. Changes in the microenvironments of these organs impair lymphopoiesis, and thereby may indirectly impinge on acquired immunity. Acquired immune responses may also be disturbed by gravitational fluctuation, stressors, and space radiation both directly and in a stress hormone-dependent manner. These changes may affect acquired immune responses to pathogens, allergens, and tumors.

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Crossref · 10.1038/s41526-020-0104-1

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  • Spaceflight has been shown to have differential inflammatory effects on crew and experimental systems in missions of a few months, and thus the influence of NTE related to immune response and synergies with other flight factors should be a concern for long-term missions.

    “Spaceflight has been shown to have differential inflammatory effects on crew and experimental systems in missions of duration of few months (Akiyama et al., 2020;Gueguinou et al., 2009), and thus the influence of NTE related to immune response and synergies with other flight factors should be a concern for long-term missions.”

    From A proposed change to astronaut exposures limits is a giant leap backwards for radiation protection (2021) · cites this paper as Akiyama et al., 2020

    Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

    Experimental — accuracy not yet measured
  • While in space, astronauts experience fluctuations of gravity that can cause dysregulation of CD8+ T cell infiltration in ganglions.

    “Likewise, while in space, astronauts experience fluctuations of gravity that can cause dysregulation of CD8+ T cell infiltration in ganglions.”

    From Key points for the development of antioxidant cocktails to prevent cellular stress and damage caused by reactive oxygen species (ROS) during manned space missions (2021) · cites this paper as [101]

    The section on immune-cell responses says T cells respond to gravitational fluctuation, and the section on disease describes CD8 T-cell infiltration in ganglia during HSV-1 latency. It does not say that gravity fluctuations dysregulate CD8 T-cell infiltration in astronauts’ ganglia; it only suggests that space-induced immune impairment may affect viral latency. Page numbers are unavailable in our copy. (LLM, conf=0.84)

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  • Hostile spaceflight environments impair lymphopoiesis in lymphoid organs, mainly the thymus, impairing the acquired immune system and increasing susceptibility to infection.

    “Additionally, these hostile spaceflight environments impair lymphopoiesis in lymphoid organs, mainly the thymus, impairing the acquired immune system even further and increasing susceptibility to infection101.”

    From Key points for the development of antioxidant cocktails to prevent cellular stress and damage caused by reactive oxygen species (ROS) during manned space missions (2021) · cites this paper as [101]

    The Abstract (page unavailable) says spaceflight-related changes in the bone marrow and thymus impair lymphopoiesis and may impinge on acquired immunity. The section “Impact of spaceflight on the development of acquired immunity” reports reduced thymic T-cell output after spaceflight. But “Effects of spaceflight on immunity and the onset of disease” says it remains unclear whether long-term microgravity promotes infectious disease, so the claimed increase in susceptibility to infection is more definite than the source supports. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • This dysregulation can permit reactivation and/or shedding of latent viruses like herpes simplex virus (HSV), varicella zoster virus, Epstein-Barr virus, and human cytomegalovirus.

    “This dysregulation can permit reactivation and/or shedding of latent viruses like herpes simplex virus (HSV), varicella zoster virus, Epstein–Barr virus, and human cytomegalovirus101 that would otherwise be easily kept at bay by a functional adaptive immune system.”

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Authors
Akiyama, T., Horie, K., Hinoi, E., Hiraiwa, M., Kato, A., Maekawa, Y., Takahashi, A., & Furukawa, S.
Affiliations
  • RIKEN Center for Integrative Medical Sciences (JP)
  • Gifu Pharmaceutical University (JP)
  • Kanazawa University (JP)
  • Institute of Medical Science, The University of Tokyo (JP)
  • Gifu University (JP)
  • Gunma University (JP)
  • Japan Aerospace Exploration Agency (JP)
Corresponding author
Akiyama, Taishin
Venue
npj Microgravity
Published
2020-05-07
Volume
6
Issue
1
Pages
14-14
ISSN
2373-8065 (ISSN-L)
OpenAlex
W3022626511
Cited by
132
References
102
Citations by year
2026: 9 · 2025: 28 · 2024: 31 · 2023: 18 · 2022: 15 · 2021: 20 · 2020: 9 · 2019: 1 · 2018: 1
FWCI
1.98
Type
journal article
Language
en
Open access
Locations
  • npj Microgravity (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Ministry of Education, Culture, Sports, Science and Technology (JP15H05935, JP15K21745, 16H01631, 18H04989, JP15H05945, 18H04968)
  • Japan Society for the Promotion of Science (19K21582, 15H05935, 15K21745, 20H03478, 20H03441)
  • Japan Aerospace Exploration Agency (JP15K21745)
  • Institute of Space and Astronautical Science (JP15K21745, JP15H05943, JP15H05945, JP15H05935)
Topics
  • Health Sciences › Medicine › Physiology › Spaceflight effects on biology
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotoxicology and immune responses
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
spaceflight, adaptive immunity, immune system, microgravity, bone marrow, thymus, lymphocyte development, stress hormones, space radiation, immune response to pathogens, antitumor immunity, allergen response

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