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Li XL, Wang WG, Li MX, Liu TL, Tian XY, Wu L. Effects of Altitude and Duration of Differing Levels of Hypoxic Exposure on Hypoxia-Inducible Factor-1α in Rat Tissues. High Alt Med Biol 2022; 23:173-184. [PMID: 35708531 DOI: 10.1089/ham.2021.0100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Li, Xiao-lin, Wei-gang Wang, Mao-xing Li, Tian-long Liu, Xiu-yu Tian, and Lan Wu. Effects of altitude and duration of differing levels of hypoxic exposure on hypoxia-inducible factor-1α in rat tissues. High Alt Med Biol. 23:173-184, 2022. Objective: This research aimed to evaluate the effects of hypoxia at different altitudes and durations on the expression of hypoxia-inducible factor-1α (HIF-1α) in rat tissues. Methods: A total of 72 Wistar rats were used to investigate the effect of hypoxia at different durations on rat tissues and 72 Wistar rats were used to investigate the effect of hypoxia at different altitudes. Hematoxylin and Eosin (HE) staining was performed to observe the pathological changes of hippocampus tissues, and the expression of HIF-1α of rats under conditions of hypoxia was detected by quantitative real-time polymerase chain reaction and western blotting. Results: According to the pathological results, we found that the degree of the brain, lung, and heart damage and HIF-1α expression, showed an increasing trend as the altitude (1,500, 3,000, 4,500, 6,000, 7,500, and 8,000 m for 12 hours) and duration (0, 6, 12, 24, 36, and 72 hours at 7,500 m) of hypoxia increased. Although there is a significant difference at 8,000 m, considering model stability, animal ethics and cost, we chose 7,500 m as a fixed altitude during hypoxia at different durations. Compared with the normoxic group, the expression of HIF-1α mRNA in the 7,500 m significantly increased by 30.48%, 21.00%, and 12.62%, in brain, lung, and heart tissue (p < 0.01), and HIF-1α mRNA in the 72-hour hypoxic exposure group significantly increased by 52.58%, 20.39%, 27.88% in tissues (p < 0.05). Compared with the normoxic group, HIF-1α protein expressions in the 7,500 m significantly increased by 10.26%, 31.71%, and 13.33% in brain, lung, and heart tissue (p < 0.01, p < 0.01, p < 0.05), and HIF-1α protein expressions in the 72-hour hypoxic exposure group significantly increased by 18.89%, 22.89%, and 29.75% in tissues (p < 0.05). Conclusion: HIF-1α expression in the rat was correlated with altitude and duration of hypoxic exposure.
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Affiliation(s)
- Xiao-Lin Li
- Department of Clinical Pharmacy, The 940th Hospital of Joint Logistic Support Force of Chinese People's Liberation Army, Lanzhou, China.,College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, China.,Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China
| | - Wei-Gang Wang
- Department of Clinical Pharmacy, The 940th Hospital of Joint Logistic Support Force of Chinese People's Liberation Army, Lanzhou, China.,College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, China.,Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China
| | - Mao-Xing Li
- Department of Clinical Pharmacy, The 940th Hospital of Joint Logistic Support Force of Chinese People's Liberation Army, Lanzhou, China.,College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, China.,Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China.,College of Pharmacy, Lanzhou University, Lanzhou, China.,Institute of Chemical Technology, Northwest Minzu University, Lanzhou, China
| | - Tian-Long Liu
- College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, China.,Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China
| | - Xiu-Yu Tian
- College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, China.,Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China.,College of Pharmacy, Lanzhou University, Lanzhou, China
| | - Lan Wu
- Institute of Chemical Technology, Northwest Minzu University, Lanzhou, China
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Pan Y, Zhang Y, Yuan J, Ma X, Zhao Y, Li Y, Li F, Gong X, Zhao J, Tang H, Wang J. Tetrahydrocurcumin mitigates acute hypobaric hypoxia-induced cerebral oedema and inflammation through the NF-κB/VEGF/MMP-9 pathway. Phytother Res 2020; 34:2963-2977. [PMID: 32573860 DOI: 10.1002/ptr.6724] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 04/07/2020] [Accepted: 04/23/2020] [Indexed: 12/23/2022]
Abstract
High-altitude cerebral oedema (HACE) is a potentially fatal manifestation of high-altitude sickness and is caused partly by inflammation and the blood-brain barrier disruption. Tetrahydrocurcumin (THC) has been reported to exert effective antioxidative and anti-inflammatory effects; This study sought to elucidate the underlying mechanism of THC in mitigating HACE using a mouse model. Our results revealed that prophylactic administration of THC (40 mg/kg) for 3 days significantly alleviated the increase in brain water content (BWC), interleukin-1β (IL-1β) and TNF-α levels caused by acute hypobaric hypoxia (AHH). Additionally, superoxide dismutase (SOD) activity was increased by THC to enhance the ability to resist hypoxia. Histological and ultrastructural analysis of the cerebrum revealed that THC administration mitigated AHH-induced pericellular oedema and reduced the perivascular space, resulting in the simultaneous remission of oedema and protection of mitochondria in the cerebrum. In vitro, astrocytes exposed to hypoxia (4% O2 ) for 24 hr exhibited and increase in IL-1β expression followed by an increase in vascular endothelial growth factor (VEGF) levels. Furthermore, THC administration remarkably downregulated VEGF, matrix metallopeptidase-9 (MMP-9), and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) expression, both in vivo and in vitro. Our data highlight the potential prophylactic activity of THC in HACE, it effectively mitigates AHH-induced cerebral oedema and inflammation is associated with the inhibition of the NF-κB/ VEGF/MMP-9 pathways.
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Affiliation(s)
- Yang Pan
- Department of Chinese Materia Medica and Natural Medicines, School of Pharmacy, The Air Force Medical University, Xi'an, China
| | - Yan Zhang
- Shaanxi University of Chinese Medicine, Xianyang, China
| | - Jiani Yuan
- Department of Chinese Materia Medica and Natural Medicines, School of Pharmacy, The Air Force Medical University, Xi'an, China
| | - Xuexinyu Ma
- Shaanxi University of Chinese Medicine, Xianyang, China
| | - Yani Zhao
- Shaanxi University of Chinese Medicine, Xianyang, China
| | - Yao Li
- Faculty of Life Science & Medicine, Northwest University, Xi'an, China
| | - Fei Li
- Department of Pharmacy, Xijing Hospital, The Air Force Medical University, Xi'an, China
| | - Xiaoli Gong
- Center for translational Chinese Medicine, Sichuan Academy of Chinese Medicine Sciences, Chengdu, China
| | - Junning Zhao
- Center for translational Chinese Medicine, Sichuan Academy of Chinese Medicine Sciences, Chengdu, China
| | - Haifeng Tang
- Department of Chinese Materia Medica and Natural Medicines, School of Pharmacy, The Air Force Medical University, Xi'an, China
| | - Jianbo Wang
- Department of Chinese Materia Medica and Natural Medicines, School of Pharmacy, The Air Force Medical University, Xi'an, China.,Center for translational Chinese Medicine, Sichuan Academy of Chinese Medicine Sciences, Chengdu, China
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DING Y, LI W, WANG R, ZHANG J. [Research progress on the effects of plateau hypoxia on blood-brain barrier structure and drug permeability]. Zhejiang Da Xue Xue Bao Yi Xue Ban 2019; 48:668-673. [PMID: 31955542 PMCID: PMC8800771 DOI: 10.3785/j.issn.1008-9292.2019.12.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 10/03/2019] [Indexed: 06/10/2023]
Abstract
Drugs for the treatment of central nervous system diseases need to enter the brain tissue through the blood-brain barrier to function. In high altitude hypoxic environment, there are changes in tight junction proteins of blood-brain barrier tissue structure, transporters in astrocytes and endothelial cells and ATP in endothelial cells; at the same time the permeability of the blood-brain barrier is increased. These changes are an important reference for rational drug use in patients with central nervous system disease in the plateau region. This article reviews the research progress on the effects of plateau hypoxia on the structure of the blood-brain barrier and related drug permeability.
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Affiliation(s)
| | | | - Rong WANG
- 王荣(1969-), 男, 博士, 主任药师, 教授, 博士生导师, 主要从事高原药代动力学等研究, E-mail:
;
https://orcid.org/0000-0001-9139-7311
| | - Jianchun ZHANG
- 张建春(1968-), 女, 博士, 硕士生导师, 主任药师, 主要从事药物新剂型及中药制剂研究, E-mail:
;
https://orcid.org/0000-0001-9459-8995
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