1
|
Shishkina V, Kostin A, Alexeeva N, Klochkova S, Nikityuk D, Volodkin A, Buchwalow I, Tiemann M, Atiakshin D. Histoarchitecture of stromal collagen fibers in gastrointestinal hollow organs of mice after a 30-day space flight. Heliyon 2024; 10:e23287. [PMID: 38163118 PMCID: PMC10757000 DOI: 10.1016/j.heliyon.2023.e23287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 01/03/2024] Open
Abstract
The digestive organs are highly sensitive to the influence of orbital flight factors and can limit the professional activities of crew members aboard the International Space Station. Connective tissue, as a system-forming matrix of the integrative-buffer metabolic environment, is of particular relevance in space biomedicine, ensuring the functioning of internal organs under an altered gravitational stimulus. However, the adaptive mechanisms of the fibrous extracellular matrix of the gastric and intestinal connective tissue have not been fully investigated under prolonged microgravity weightlessness. Using histochemical techniques, we experimentally studied the state of collagen fibers in the specific tissue microenvironment of the gastric and intestinal membranes in C57BL/6 N mice after a 30-day space flight, subsequent 7-day ground readaptation, and in animals of the relevant control groups. The 30-day stay of laboratory animals aboard the Bion-M 1 biosatellite resulted in a reduction in the fibrous extracellular matrix of connective tissue in the studied digestive organs, excepting the gastric lamina propria. Increased fibrillogenesis was revealed in the gastrointestinal mucous membranes of animals 7 days after biosatellite landing compared with the parameters of animals in the space flight group. During the experiment with ground simulated orbital flight conditions, changes in collagen fibers were not significant compared to the vivarium control group. Thus, the results obtained evidence gravisensitivity of the fibrous extracellular matrix of the intraorgan connective tissue. This fact also highlights the necessity to further improve gastrointestinal tract-related preventive measures for astronauts during orbital flight.
Collapse
Affiliation(s)
- Viktoriya Shishkina
- Research Institute of Experimental Biology and Medicine, Burdenko Voronezh State Medical University, 394036 Voronezh, Russia
| | - Andrey Kostin
- RUDN University, 6 Miklukho-Maklaya St, Moscow, 117198, Russia
| | - Nataliya Alexeeva
- Research Institute of Experimental Biology and Medicine, Burdenko Voronezh State Medical University, 394036 Voronezh, Russia
| | | | - Dmitry Nikityuk
- Federal State Budgetary Institution "Federal Research Center for Nutrition, Biotechnology and Food Safety", 109240 Moscow, Russia
| | - Artem Volodkin
- RUDN University, 6 Miklukho-Maklaya St, Moscow, 117198, Russia
| | - Igor Buchwalow
- RUDN University, 6 Miklukho-Maklaya St, Moscow, 117198, Russia
- Institute for Hematopathology, 22547 Hamburg, Germany
| | | | - Dmitrii Atiakshin
- Research Institute of Experimental Biology and Medicine, Burdenko Voronezh State Medical University, 394036 Voronezh, Russia
- RUDN University, 6 Miklukho-Maklaya St, Moscow, 117198, Russia
| |
Collapse
|
2
|
Samoilenko T, Shishkina V, Antakova L, Goryushkina Y, Kostin A, Buchwalow I, Tiemann M, Atiakshin D. Smooth Muscle Actin as a Criterion for Gravisensitivity of Stomach and Jejunum in Laboratory Rodents. Int J Mol Sci 2023; 24:16539. [PMID: 38003728 PMCID: PMC10671600 DOI: 10.3390/ijms242216539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 11/09/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023] Open
Abstract
Smooth muscle tissue (SMT) is one of the main structural components of visceral organs, acting as a key factor in the development of adaptive and pathological conditions. Despite the crucial part of SMT in the gastrointestinal tract activity, the mechanisms of its gravisensitivity are still insufficiently studied. The study evaluated the content of smooth muscle actin (α-SMA) in the membranes of the gastric fundus and jejunum in C57BL/6N mice (30-day space flight), in Mongolian gerbils Meriones unguiculatus (12-day orbital flight) and after anti-orthostatic suspension according to E.R. Morey-Holton. A morphometric analysis of α-SMA in the muscularis externa of the stomach and jejunum of mice and Mongolian gerbils from space flight groups revealed a decreased area of the immunopositive regions, a fact indicating a weakening of the SMT functional activity. Gravisensitivity of the contractile structures of the digestive system may be due to changes in the myofilament structural components of the smooth myocytes or myofibroblast actin. A simulated antiorthostatic suspension revealed no significant changes in the content of the α-SMA expression level, a fact supporting an alteration in the functional properties of the muscularis externa of the digestive hollow organs under weightless environment. The data obtained contribute to the novel mechanisms of the SMT contractile apparatus remodeling during orbital flights and can be used to improve preventive measures in space biomedicine.
Collapse
Affiliation(s)
- Tatyana Samoilenko
- Research Institute of Experimental Biology and Medicine, Burdenko Voronezh State Medical University, Moskovsky Prospekt 189a, 394036 Voronezh, Russia
| | - Viktoriya Shishkina
- Research Institute of Experimental Biology and Medicine, Burdenko Voronezh State Medical University, Moskovsky Prospekt 189a, 394036 Voronezh, Russia
| | - Lyubov Antakova
- Research Institute of Experimental Biology and Medicine, Burdenko Voronezh State Medical University, Moskovsky Prospekt 189a, 394036 Voronezh, Russia
| | - Yelena Goryushkina
- Research Institute of Experimental Biology and Medicine, Burdenko Voronezh State Medical University, Moskovsky Prospekt 189a, 394036 Voronezh, Russia
| | - Andrey Kostin
- Research and Educational Resource Center for Immunophenotyping, Digital Spatial Profiling and Ultrastructural Analysis Innovative Technologies, RUDN University, 6 Miklukho-Maklaya St, 117198 Moscow, Russia
| | - Igor Buchwalow
- Research and Educational Resource Center for Immunophenotyping, Digital Spatial Profiling and Ultrastructural Analysis Innovative Technologies, RUDN University, 6 Miklukho-Maklaya St, 117198 Moscow, Russia
- Institute for Hematopathology, 22547 Hamburg, Germany
| | | | - Dmitrii Atiakshin
- Research Institute of Experimental Biology and Medicine, Burdenko Voronezh State Medical University, Moskovsky Prospekt 189a, 394036 Voronezh, Russia
- Research and Educational Resource Center for Immunophenotyping, Digital Spatial Profiling and Ultrastructural Analysis Innovative Technologies, RUDN University, 6 Miklukho-Maklaya St, 117198 Moscow, Russia
| |
Collapse
|