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Aboouf MA, Thiel CS, Borisov SM, Tauber S, Bönzli E, Schetle N, Ullrich O, Gassmann M, Vogel J. Expression of hypoxia-inducible genes is suppressed in altered gravity due to impaired nuclear HIF1α accumulation. Sci Rep 2023; 13:14514. [PMID: 37666879 PMCID: PMC10477221 DOI: 10.1038/s41598-023-41686-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 08/30/2023] [Indexed: 09/06/2023] Open
Abstract
Extravehicular activities, the backbone of manned space exploration programs, set astronauts into mild hypoxia. Unfortunately, microgravity aggravates threatening symptoms of hypoxia such as vision impairment and brain edema. Hypoxia-inducible factors (HIFs) sense cellular hypoxia and, subsequently, change the cells' expression profile instantaneously by rapidly translocating-most likely cytoskeleton-dependently-into the nucleus and subsequently forming transcription complexes with other proteins. We tested the hypothesis that this fundamental process could be altered by sudden changes in gravitational forces in parabolic flights using a newly developed pocket-size cell culture lab that deoxygenizes cells within 15 min. Sudden gravity changes (SGCs 1g-1.8g-0g-1.8g-1g) during hypoxic exposure suppressed expression of the HIF1α-dependent genes investigated as compared with hypoxia at constant 1g. Normoxic cells subjected to SGCs showed reduced nuclear but not cytoplasmatic HIF1α signal and appeared to have disturbed cytoskeleton architecture. Inhibition of the actin-dependent intracellular transport using a combination of myosin V and VI inhibitors during hypoxia mimicked the suppression of the HIF1α-dependent genes observed during hypoxic exposure during SGCs. Thus, SGCs seem to disrupt the cellular response to hypoxia by impairing the actin-dependent translocation of HIF1α into the nucleus.
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Affiliation(s)
- Mostafa A Aboouf
- Vetsuisse Faculty, Institute of Veterinary Physiology, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland.
- Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland.
- Vetsuisse Faculty, Center for Clinical Studies, University of Zurich, 8057, Zurich, Switzerland.
- Department of Biochemistry, Faculty of Pharmacy, Ain Shams University, Cairo, 11566, Egypt.
| | - Cora S Thiel
- Faculty of Medicine, Institute of Anatomy, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
- UZH Space Hub, Air Force Center, Air Base Dübendorf, Überlandstrasse 270, 8600, Dubendorf, Switzerland
| | - Sergey M Borisov
- Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Stremayrgasse 9, 8010, Graz, Austria
| | - Svantje Tauber
- Faculty of Medicine, Institute of Anatomy, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
- UZH Space Hub, Air Force Center, Air Base Dübendorf, Überlandstrasse 270, 8600, Dubendorf, Switzerland
| | - Eva Bönzli
- Vetsuisse Faculty, Center for Clinical Studies, University of Zurich, 8057, Zurich, Switzerland
- Clinical Laboratory, Department for Clinical Services and Diagnostics, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland
| | - Nelli Schetle
- Vetsuisse Faculty, Institute of Veterinary Physiology, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland
| | - Oliver Ullrich
- Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
- Faculty of Medicine, Institute of Anatomy, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
- UZH Space Hub, Air Force Center, Air Base Dübendorf, Überlandstrasse 270, 8600, Dubendorf, Switzerland
| | - Max Gassmann
- Vetsuisse Faculty, Institute of Veterinary Physiology, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland
- Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
- UZH Space Hub, Air Force Center, Air Base Dübendorf, Überlandstrasse 270, 8600, Dubendorf, Switzerland
| | - Johannes Vogel
- Vetsuisse Faculty, Institute of Veterinary Physiology, University of Zurich, Winterthurerstrasse 260, 8057, Zurich, Switzerland
- Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Zurich, Switzerland
- UZH Space Hub, Air Force Center, Air Base Dübendorf, Überlandstrasse 270, 8600, Dubendorf, Switzerland
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Moser D, Sun SJ, Li N, Biere K, Hoerl M, Matzel S, Feuerecker M, Buchheim JI, Strewe C, Thiel CS, Gao YX, Wang CZ, Ullrich O, Long M, Choukèr A. Cells´ Flow and Immune Cell Priming under alternating g-forces in Parabolic Flight. Sci Rep 2019; 9:11276. [PMID: 31375732 PMCID: PMC6677797 DOI: 10.1038/s41598-019-47655-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 07/04/2019] [Indexed: 12/31/2022] Open
Abstract
Gravitational stress in general and microgravity (µg) in particular are regarded as major stress factors responsible for immune system dysfunction in space. To assess the effects of alternating µg and hypergravity (hyper-g) on immune cells, the attachment of peripheral blood mononuclear cells (PBMCs) to adhesion molecules under flow conditions and the antigen-induced immune activation in whole blood were investigated in parabolic flight (PF). In contrast to hyper-g (1.8 g) and control conditions (1 g), flow and rolling speed of PBMCs were moderately accelerated during µg-periods which were accompanied by a clear reduction in rolling rate. Whole blood analyses revealed a "primed" state of monocytes after PF with potentiated antigen-induced pro-inflammatory cytokine responses. At the same time, concentrations of anti-inflammatory cytokines were increased and monocytes displayed a surface molecule pattern that indicated immunosuppression. The results suggest an immunologic counterbalance to avoid disproportionate immune responses. Understanding the interrelation of immune system impairing and enhancing effects under different gravitational conditions may support the design of countermeasures to mitigate immune deficiencies in space.
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Affiliation(s)
- D Moser
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - S J Sun
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - N Li
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - K Biere
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - M Hoerl
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - S Matzel
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - M Feuerecker
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - J-I Buchheim
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - C Strewe
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - C S Thiel
- Institute of Anatomy, Faculty of Medicine, University of Zurich, Zurich, Switzerland.,Department of Machine Design, Engineering Design and Product Development (IMK), Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
| | - Y X Gao
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - C Z Wang
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - O Ullrich
- Institute of Anatomy, Faculty of Medicine, University of Zurich, Zurich, Switzerland.,Department of Machine Design, Engineering Design and Product Development (IMK), Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
| | - M Long
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China. .,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - A Choukèr
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany.
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Morabito C, Guarnieri S, Catizone A, Schiraldi C, Ricci G, Mariggiò MA. Transient increases in intracellular calcium and reactive oxygen species levels in TCam-2 cells exposed to microgravity. Sci Rep 2017; 7:15648. [PMID: 29142208 PMCID: PMC5688167 DOI: 10.1038/s41598-017-15935-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 11/02/2017] [Indexed: 11/14/2022] Open
Abstract
The effects of microgravity on functions of the human body are well described, including alterations in the male and female reproductive systems. In the present study, TCam-2 cells, which are considered a good model of mitotically active male germ cells, were used to investigate intracellular signalling and cell metabolism during exposure to simulated microgravity, a condition that affects cell shape and cytoskeletal architecture. After a 24 hour exposure to simulated microgravity, TCam-2 cells showed 1) a decreased proliferation rate and a delay in cell cycle progression, 2) increased anaerobic metabolism accompanied by increased levels of intracellular Ca2+, reactive oxygen species and superoxide anion and modifications in mitochondrial morphology. Interestingly, all these events were transient and were no longer evident after 48 hours of exposure. The presence of antioxidants prevented not only the effects described above but also the modifications in cytoskeletal architecture and the activation of the autophagy process induced by simulated microgravity. In conclusion, in the TCam-2 cell model, simulated microgravity activated the oxidative machinery, triggering transient macroscopic cell events, such as a reduction in the proliferation rate, changes in cytoskeleton-driven shape and autophagy activation.
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Affiliation(s)
- C Morabito
- Department of Neuroscience, Imaging and Clinical Sciences and Centro Scienze dell' Invecchiamento e Medicina Traslazionale (CeSI-MeT), "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - S Guarnieri
- Department of Neuroscience, Imaging and Clinical Sciences and Centro Scienze dell' Invecchiamento e Medicina Traslazionale (CeSI-MeT), "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - A Catizone
- Section of Histology and Medical Embryology, Department of Anatomy, Histology, Forensic and Orthopaedic Medicine, "Sapienza" University of Rome, Rome, Italy
| | - C Schiraldi
- Department of Experimental Medicine, Università degli Studi della Campania "Luigi Vanvitelli", Naples, Italy
| | - G Ricci
- Department of Experimental Medicine, Università degli Studi della Campania "Luigi Vanvitelli", Naples, Italy
| | - M A Mariggiò
- Department of Neuroscience, Imaging and Clinical Sciences and Centro Scienze dell' Invecchiamento e Medicina Traslazionale (CeSI-MeT), "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy.
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Hyperbaric hyperoxia alters innate immune functional properties during NASA Extreme Environment Mission Operation (NEEMO). Brain Behav Immun 2015; 50:52-57. [PMID: 26116982 DOI: 10.1016/j.bbi.2015.06.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 06/19/2015] [Accepted: 06/22/2015] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Spaceflight is associated with immune dysregulation which is considered as risk factor for the performance of exploration-class missions. Among the consequences of confinement and other environmental factors of living in hostile environments, the role of different oxygen concentrations is of importance as either low (e.g. as considered for lunar or Martian habitats) or high (e.g. during extravehicular activities) can trigger immune dysfunction. The aim of this study was to investigate the impact of increased oxygen availability--generated through hyperbaricity--on innate immune functions in the course of a 14 days NEEMO mission. METHODS 6 male subjects were included into a 14 days undersea deployment at the Aquarius station (Key Largo, FL, USA). The underwater habitat is located at an operating depth of 47 ft. The 2.5 times higher atmospheric pressure in the habitat leads to hyperoxia. The collection of biological samples occurred 6 days before (L-6), at day 7 (MD7) and 11/13 (MD11/13) during the mission, and 90 days thereafter (R). Blood analyses included differential blood cell count, ex vivo innate immune activation status and inhibitory competences of granulocytes. RESULTS The absolute leukocyte count showed an increase during deployment as well as the granulocyte and monocyte count. Lymphocyte count was decreased on MD7. The assessments of native adhesion molecules on granulocytes (CD11b, CD62L) indicated a highly significant cellular activation (L-6 vs. MD7/MD13) during mission. In contrast, granulocytes were more sensitive towards anti-inflammatory stimuli (adenosine) on MD13. CONCLUSION Living in the NEEMO habitat for 14 days induced significant immune alterations as seen by an activation of adhesion molecules and vice versa higher sensitivity towards inhibition. This investigation under hyperbaric hyperoxia is important especially for Astronauts' immune competence during extravehicular activities when exposed to similar conditions.
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