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Zhang G, Yang G, Zhou Y, Cao Z, Yin M, Ma L, Fan M, Zhao YQ, Zhu L. Intermittent hypoxia training effectively protects against cognitive decline caused by acute hypoxia exposure. Pflugers Arch 2024; 476:197-210. [PMID: 37994929 DOI: 10.1007/s00424-023-02885-x] [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: 07/16/2023] [Revised: 10/24/2023] [Accepted: 11/08/2023] [Indexed: 11/24/2023]
Abstract
Intermittent hypoxia training (IHT) is a promising approach that has been used to induce acclimatization to hypoxia and subsequently lower the risk of developing acute mountain sickness (AMS). However, the effects of IHT on cognitive and cerebrovascular function after acute hypoxia exposure have not been characterized. In the present study, we first confirmed that the simplified IHT paradigm was effective at relieving AMS at 4300 m. Second, we found that IHT improved participants' cognitive and neural alterations when they were exposed to hypoxia. Specifically, impaired working memory performance, decreased conflict control function, impaired cognitive control, and aggravated mental fatigue induced by acute hypoxia exposure were significantly alleviated in the IHT group. Furthermore, a reversal of brain swelling induced by acute hypoxia exposure was visualized in the IHT group using magnetic resonance imaging. An increase in cerebral blood flow (CBF) was observed in multiple brain regions of the IHT group after hypoxia exposure as compared with the control group. Based on these findings, the simplified IHT paradigm might facilitate hypoxia acclimatization, alleviate AMS symptoms, and increase CBF in multiple brain regions, thus ameliorating brain swelling and cognitive dysfunction.
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Affiliation(s)
- Guangbo Zhang
- Department of Cognition Sciences and Stress Medicine, Beijing Institute of Basic Medical Sciences, No. 27 Taiping Road, Haidian District, Beijing, China
- Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
| | - Guochun Yang
- CAS Key Laboratory of Behavioral Science, Institute of Psychology, Beijing, China
| | - Yanzhao Zhou
- Department of Cognition Sciences and Stress Medicine, Beijing Institute of Basic Medical Sciences, No. 27 Taiping Road, Haidian District, Beijing, China
| | | | - Ming Yin
- The First Medical Center of Chinese, PLA General Hospital, Beijing, China
| | - Lin Ma
- The First Medical Center of Chinese, PLA General Hospital, Beijing, China
| | - Ming Fan
- Department of Cognition Sciences and Stress Medicine, Beijing Institute of Basic Medical Sciences, No. 27 Taiping Road, Haidian District, Beijing, China
- Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China
- Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Yong-Qi Zhao
- Department of Cognition Sciences and Stress Medicine, Beijing Institute of Basic Medical Sciences, No. 27 Taiping Road, Haidian District, Beijing, China.
- Anhui Medical University, Hefei, China.
| | - Lingling Zhu
- Department of Cognition Sciences and Stress Medicine, Beijing Institute of Basic Medical Sciences, No. 27 Taiping Road, Haidian District, Beijing, China.
- Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, China.
- Anhui Medical University, Hefei, China.
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Sui H, Yang J, Yan C. Clinical prediction of magnetic resonance image compilation in patients with mild cognitive impairment. Int J Dev Neurosci 2023; 83:16-22. [PMID: 36219509 DOI: 10.1002/jdn.10232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 09/15/2022] [Accepted: 09/27/2022] [Indexed: 02/04/2023] Open
Abstract
This study aims to investigate the clinical prediction of magnetic resonance image compilation (MAGiC) and magnetic resonance image (MRI) in early diagnosis of the patients with mild cognitive impairment. This study is a retrospective randomized controlled clinical trial, and all patients are divided into following two groups: experiment group and control group. Patients in the experiment group are detected by MAGiC, and patients in the control group are detected by MRI; the clinical material from the two groups of patients with MCI are collected, and then Wechsler Memory Scale-Logical Memory (WMS-LM) and Mini-Mental State Examination (MMSE) are recorded by follow-up. Images by MAGiC have higher accuracy and definition compared with those by MRI. WMS-LM score and MMSE score in the experiment group are significantly better than those in the control group. We can conclude that MAGiC is a promising way to evaluate the clinical prediction in patients with MCI.
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Affiliation(s)
- Haijing Sui
- Department of Radiology, Pudong New Area People's Hospital, Shanghai, China
| | - Juan Yang
- Department of Neurology, Pudong New Area People's Hospital, Shanghai, China
| | - Chenggong Yan
- Department of Radiology, Pudong New Area Hospital of Traditional Chinese Medicine, Shanghai, China
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Hou J, Wen X, Long P, Xiong S, Liu H, Cai L, Deng H, Zhang Z. The role of post-translational modifications in driving abnormal cardiovascular complications at high altitude. Front Cardiovasc Med 2022; 9:886300. [PMID: 36186970 PMCID: PMC9515308 DOI: 10.3389/fcvm.2022.886300] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 06/16/2022] [Indexed: 11/13/2022] Open
Abstract
The high-altitude environment is characterized by hypobaric hypoxia, low temperatures, low humidity, and high radiation, which is a natural challenge for lowland residents entering. Previous studies have confirmed the acute and chronic effects of high altitude on the cardiovascular systems of lowlanders. Abnormal cardiovascular complications, including pulmonary edema, cardiac hypertrophy and pulmonary arterial hypertension were commonly explored. Effective evaluation of cardiovascular adaptive response in high altitude can provide a basis for early warning, prevention, diagnosis, and treatment of altitude diseases. At present, post-translational modifications (PTMs) of proteins are a key step to regulate their biological functions and dynamic interactions with other molecules. This process is regulated by countless enzymes called “writer, reader, and eraser,” and the performance is precisely controlled. Mutations and abnormal expression of these enzymes or their substrates have been implicated in the pathogenesis of cardiovascular diseases associated with high altitude. Although PTMs play an important regulatory role in key processes such as oxidative stress, apoptosis, proliferation, and hypoxia response, little attention has been paid to abnormal cardiovascular response at high altitude. Here, we reviewed the roles of PTMs in driving abnormal cardiovascular complications at high altitude.
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Affiliation(s)
- Jun Hou
- Department of Cardiology, Chengdu Third People’s Hospital, Cardiovascular Disease Research Institute of Chengdu, Affiliated Hospital of Southwest Jiaotong University, Chengdu, China
- School of Material Science and Engineering, Southwest Jiaotong University, Chengdu, China
| | - Xudong Wen
- Department of Gastroenterology and Hepatology, Chengdu First People’s Hospital, Chengdu, China
| | - Pan Long
- School of Material Science and Engineering, Southwest Jiaotong University, Chengdu, China
| | - Shiqiang Xiong
- Department of Cardiology, Chengdu Third People’s Hospital, Cardiovascular Disease Research Institute of Chengdu, Affiliated Hospital of Southwest Jiaotong University, Chengdu, China
| | - Hanxiong Liu
- Department of Cardiology, Chengdu Third People’s Hospital, Cardiovascular Disease Research Institute of Chengdu, Affiliated Hospital of Southwest Jiaotong University, Chengdu, China
| | - Lin Cai
- Department of Cardiology, Chengdu Third People’s Hospital, Cardiovascular Disease Research Institute of Chengdu, Affiliated Hospital of Southwest Jiaotong University, Chengdu, China
- *Correspondence: Lin Cai,
| | - Haoyu Deng
- Department of Medicine, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
- Center for Heart and Lung Innovation, St. Paul’s Hospital, University of British Columbia, Vancouver, BC, Canada
- Department of Vascular Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Haoyu Deng,
| | - Zhen Zhang
- Department of Cardiology, Chengdu Third People’s Hospital, Cardiovascular Disease Research Institute of Chengdu, Affiliated Hospital of Southwest Jiaotong University, Chengdu, China
- Zhen Zhang,
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Hou J, Zheng D, Wen X, Xiao W, Han F, Lang H, Xiong S, Jiang W, Hu Y, He M, Long P. Proteomic and Morphological Profiling of Mice Ocular Tissue During High-altitude Acclimatization Process: An Animal Study at Lhasa. J Inflamm Res 2022; 15:2835-2853. [PMID: 35645575 PMCID: PMC9135145 DOI: 10.2147/jir.s361174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 04/27/2022] [Indexed: 12/31/2022] Open
Abstract
Purpose High-altitude environment mainly with hypobaric hypoxia could induce pathological alterations in ocular tissue. Previous studies have mostly focused on sporadic case reports and simulated high-altitude hypoxia experiments. This aim of this study was to explore the proteomic and morphological changes of ocular tissue in mice at real altitude environment. Methods In this study, mice were flown from Chengdu (elevation: 500 m) to Lhasa (elevation: 3600 m). After exposure for 1day, 3, 6, 10, 20, 30, and 40days, the mice were euthanatized to obtain blood and ocular tissue. Serological tests, ocular pathological examinations, integral ocular proteomics analysis, and Western blot were conducted. Results We focused on acute phase (1–3 days) and chronic phase (>30 days) during high-altitude acclimatization. Serum interleukin-1 was increased at 3 days, while superoxide dismutase, interleukin-6, and tumor necrosis factor-α showed no statistical changes. H&E staining demonstrated that the cornea was edematous at 3 days and exhibited slower proliferation at 30 days. The choroid showed a consistently significant thickening, while there existed no noticeable changes in retinal thickness. Overall, 4073 proteins were identified, among which 71 and 119 proteins were detected to have significant difference at 3 days and 40 days when compared with the control group. Functional enrichment analysis found the differentiated proteins at 3 days exposure functionally related with response to radiation, dephosphorylation, negative regulation of cell adhesion, and erythrocyte homeostasis. Moreover, the differential profiles of the proteins at 40 days exposure exhibited changes of regulation of complement activation, regulation of protein activation cascade, regulation of humoral immune response, second-messenger-mediated signaling, regulation of leukocyte activation, and cellular iron homeostasis. Interestingly, we found the ocular proteins with lactylation modification were increased along high-altitude adaptation. Conclusion This is the first work reporting the ocular proteomic and morphological changes at real high-altitude environment. We expect it would deep the understanding of ocular response during altitude acclimatization.
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Affiliation(s)
- Jun Hou
- Department of Cardiology, Chengdu Third People’s Hospital/Affiliated Hospital of Southwest Jiaotong University, Chengdu, People’s Republic of China
| | - Dezhi Zheng
- Department of Cardiovascular Surgery, the 960th Hospital of the PLA Joint Logistic Support Force, Jinan, People’s Republic of China
| | - Xudong Wen
- Department of Gastroenterology and Hepatology, Chengdu First People’s Hospital, Chengdu, People’s Republic of China
| | - Wenjing Xiao
- School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, People’s Republic of China
| | - Fei Han
- Department of Ophthalmology, the General Hospital of Western Theater Command, Chengdu, People’s Republic of China
| | - Hongmei Lang
- The Center of Obesity and Metabolic Diseases, Department of General Surgery, Chengdu Third People’s Hospital & the Affiliated Hospital of Southwest Jiaotong University, Chengdu, People’s Republic of China
| | - Shiqiang Xiong
- Department of Cardiology, Chengdu Third People’s Hospital/Affiliated Hospital of Southwest Jiaotong University, Chengdu, People’s Republic of China
| | - Wei Jiang
- Department of Ophthalmology, the General Hospital of Western Theater Command, Chengdu, People’s Republic of China
| | - Yonghe Hu
- School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, People’s Republic of China
- Yonghe Hu, School of Materials Science and Engineering, Southwest Jiaotong University, No. 111, North First Section of the Second Ring Road, Chengdu, People’s Republic of China, Tel +86-138-8059-6789, Email
| | - Mengshan He
- Department of Pharmacy, Xijing Hospital, Fourth Military Medical University, Xi’an, People’s Republic of China
| | - Pan Long
- School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, People’s Republic of China
- Department of Ophthalmology, the General Hospital of Western Theater Command, Chengdu, People’s Republic of China
- Correspondence: Pan Long, Department of Ophthalmology, the General Hospital of Western Theater Command, Rongdu Avenue #270, Chengdu, People’s Republic of China, Tel +86-181-9125-6132, Email
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Effect of a speed ascent to the top of Europe on cognitive function in elite climbers. Eur J Appl Physiol 2022; 122:635-649. [PMID: 34993575 DOI: 10.1007/s00421-021-04855-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Accepted: 11/19/2021] [Indexed: 11/03/2022]
Abstract
PURPOSE The combined effects of acute hypoxia and exercise on cognition remain to be clarified. We investigated the effect of speed climbing to high altitude on reactivity and inhibitory control in elite climbers. METHODS Eleven elite climbers performed a speed ascent of the Mont-Blanc (4810 m) and were evaluated pre- (at 1000 m) and immediately post-ascent (at 3835 m). In both conditions, a Simon task was done at rest (single-task session, ST) and during a low-intensity exercise (dual-task session, DT). Prefrontal cortex (PFC) oxygenation and middle cerebral artery velocity (MCAv) were monitored using near-infrared spectroscopy and transcranial Doppler, respectively, during the cognitive task. Self-perceived mental fatigue and difficulty to perform the cognitive tests were estimated using a visual analog scale. Heart rate and pulse oxygenation (SpO2) were monitored during the speed ascent. RESULTS Elite climbers performed an intense (~ 50% of the time ≥ 80% of maximal heart rate) and prolonged (8h58 ± 6 min) exercise in hypoxia (minimal SpO2 at 4810 m: 78 ± 4%). Reaction time and accuracy during the Simon task were similar pre- and post-ascent (374 ± 28 ms vs. 385 ± 39 ms and 6 ± 4% vs. 5 ± 4%, respectively; p > 0.05), despite a reported higher mental fatigue and difficulty to perform the Simon task post-ascent (all p < 0.05). The magnitude of the Simon effect was unaltered (p > 0.05), suggesting a preserved cognitive control post-ascent. Pattern of PFC oxygenation and MCAv differed between pre- and post-ascent as well as between ST and DT conditions. CONCLUSIONS Cognitive control is not altered in elite climbers after a speed ascent to high-altitude despite substantial cerebral deoxygenation and fatigue perception.
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Algaze I, Phillips L, Harris NS. Response to Falla et al. re: "Incidence of Mild Cognitive Impairment with Ascending Altitude". High Alt Med Biol 2020; 21:425. [PMID: 32654528 DOI: 10.1089/ham.2020.0113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Isabel Algaze
- Department of Emergency Medicine, University of California Irvine Medical Center, Orange, California, USA
| | - Lara Phillips
- Department of Emergency Medicine, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA
| | - N Stuart Harris
- Department of Emergency Medicine, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA
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Falla M, Hüfner K, Weiss EM, Papagno C. Re: "Incidence of Mild Cognitive Impairment with Ascending Altitude" by Algaze et al. High Alt Med Biol 2020; 21:311-312. [PMID: 32551902 DOI: 10.1089/ham.2020.0085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Marika Falla
- Center for Mind/Brain Sciences (CIMeC) and Centre for Neurocognitive Rehabilitation (CeRIN), University of Trento, Rovereto, Italy.,Institute of Mountain Emergency Medicine, Eurac Research, Bolzano, Italy
| | - Katharina Hüfner
- Division of Psychiatry II (Psychosomatic Medicine), Department of Psychiatry, Psychotherapy and Psychosomatics, Medical University Innsbruck, Innsbruck, Austria
| | - Elisabeth M Weiss
- University of Innsbruck, Institute of Psychology. Innsbruck, Austria
| | - Costanza Papagno
- Center for Mind/Brain Sciences (CIMeC) and Centre for Neurocognitive Rehabilitation (CeRIN), University of Trento, Rovereto, Italy
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