Immune System Dysregulation During Spaceflight: Potential Countermeasures for Deep Space Exploration Missions - PubMed (original) (raw)
Review
doi: 10.3389/fimmu.2018.01437. eCollection 2018.
Alexander Choukèr [ 2](#full-view-affiliation-2 "Laboratory of Translational Research "Stress and Immunity", Department of Anesthesiology, Hospital of the Ludwig-Maximilians-University, Munich, Germany."), Richard J Simpson 3 4 5, Satish Mehta 6, Gailen Marshall 7, Scott M Smith 1, Sara R Zwart 8, Martina Heer 9, Sergey Ponomarev 10, Alexandra Whitmire 11, Jean P Frippiat 12, Grace L Douglas 13, Hernan Lorenzi 14, Judith-Irina Buchheim [ 2](#full-view-affiliation-2 "Laboratory of Translational Research "Stress and Immunity", Department of Anesthesiology, Hospital of the Ludwig-Maximilians-University, Munich, Germany."), George Makedonas 6, Geoffrey S Ginsburg 15, C Mark Ott 1, Duane L Pierson 1, Stephanie S Krieger 11, Natalie Baecker 9, Clarence Sams 1
Affiliations
- PMID: 30018614
- PMCID: PMC6038331
- DOI: 10.3389/fimmu.2018.01437
Review
Immune System Dysregulation During Spaceflight: Potential Countermeasures for Deep Space Exploration Missions
Brian E Crucian et al. Front Immunol. 2018.
Abstract
Recent studies have established that dysregulation of the human immune system and the reactivation of latent herpesviruses persists for the duration of a 6-month orbital spaceflight. It appears certain aspects of adaptive immunity are dysregulated during flight, yet some aspects of innate immunity are heightened. Interaction between adaptive and innate immunity also seems to be altered. Some crews experience persistent hypersensitivity reactions during flight. This phenomenon may, in synergy with extended duration and galactic radiation exposure, increase specific crew clinical risks during deep space exploration missions. The clinical challenge is based upon both the frequency of these phenomena in multiple crewmembers during low earth orbit missions and the inability to predict which specific individual crewmembers will experience these changes. Thus, a general countermeasure approach that offers the broadest possible coverage is needed. The vehicles, architecture, and mission profiles to enable such voyages are now under development. These include deployment and use of a cis-Lunar station (mid 2020s) with possible Moon surface operations, to be followed by multiple Mars flyby missions, and eventual human Mars surface exploration. Current ISS studies will continue to characterize physiological dysregulation associated with prolonged orbital spaceflight. However, sufficient information exists to begin consideration of both the need for, and nature of, specific immune countermeasures to ensure astronaut health. This article will review relevant in-place operational countermeasures onboard ISS and discuss a myriad of potential immune countermeasures for exploration missions. Discussion points include nutritional supplementation and functional foods, exercise and immunity, pharmacological options, the relationship between bone and immune countermeasures, and vaccination to mitigate herpes (and possibly other) virus risks. As the immune system has sentinel connectivity within every other physiological system, translational effects must be considered for all potential immune countermeasures. Finally, we shall discuss immune countermeasures in the context of their individualized implementation or precision medicine, based on crewmember specific immunological biases.
Keywords: countermeasures; gravity; immunity; spaceflight; viral reactivation.
Figures
Figure 1
Graphic which illustrates the translational aspects of the immune system. The cells of the immune system, located in virtually everywhere throughout the body, exchange reciprocal information with, and influence/are influenced by, most of the other physiological systems in the human body. Therefore, countermeasures for immune may influence other body systems, and conversely any biomedical countermeasures implemented (e.g., for bone) during flight may similarly have bystander effects on immunity. (Cellular graphic sourced from “The Biology Project,” University of Arizona.)
Figure 2
NASA Astronaut Peggy Whitson collects a blood sample in the European Space Agency “Columbus” module onboard the International Space Station. The blood sample was for the study of the immune system of astronauts. The blood samples were transported, ambient temperature to preserve cell viability, to Earth for terrestrial analysis. The individual depicted has provided written consent for the publication of this image. To maintain viability, samples were collected during spaceflight in ACD anticoagulated tubes. The average delay from collection onboard ISS, through landing, to terrestrial analysis in Houston, Texas was ~37 h.
Figure 3
Listing of likely biomedical and/or operational countermeasures for deep space exploration missions with the potential to benefit spaceflight-associated dysregulation of the human immune system. Broadly, the countermeasures may be considered general/operational multisystem influencing the entire crew, or specific biomedical treatments (generally ingestible). A third category, precision or personalized, describes the possibility to “screen” crewmembers pre-flight to determine their unique immunological biases or susceptibilities, against which specific in-flight countermeasures may be tailored for individual crewmembers.
Comment in
- Commentary: Immune System Dysregulation During Spaceflight: Potential Countermeasures for Deep Space Exploration Missions.
Bevelacqua JJ, Mortazavi SMJ. Bevelacqua JJ, et al. Front Immunol. 2018 Sep 4;9:2024. doi: 10.3389/fimmu.2018.02024. eCollection 2018. Front Immunol. 2018. PMID: 30233600 Free PMC article. No abstract available.
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