1
|
Dai S, Feng Y, Lu C, Zhang H, Ma W, Xie W, Wu X, Luo P, Zhang L, Fei F, Fei Z, Li X. Impairment of Autophagic Flux After Hypobaric Hypoxia Potentiates Oxidative Stress and Cognitive Function Disturbances in Mice. Neurosci Bull 2024; 40:35-49. [PMID: 37608137 PMCID: PMC10774493 DOI: 10.1007/s12264-023-01099-6] [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: 11/20/2022] [Accepted: 06/01/2023] [Indexed: 08/24/2023] Open
Abstract
Acute hypobaric hypoxic brain damage is a potentially fatal high-altitude sickness. Autophagy plays a critical role in ischemic brain injury, but its role in hypobaric hypoxia (HH) remains unknown. Here we used an HH chamber to demonstrate that acute HH exposure impairs autophagic activity in both the early and late stages of the mouse brain, and is partially responsible for HH-induced oxidative stress, neuronal loss, and brain damage. The autophagic agonist rapamycin only promotes the initiation of autophagy. By proteome analysis, a screen showed that protein dynamin2 (DNM2) potentially regulates autophagic flux. Overexpression of DNM2 significantly increased the formation of autolysosomes, thus maintaining autophagic flux in combination with rapamycin. Furthermore, the enhancement of autophagic activity attenuated oxidative stress and neurological deficits after HH exposure. These results contribute to evidence supporting the conclusion that DNM2-mediated autophagic flux represents a new therapeutic target in HH-induced brain damage.
Collapse
Affiliation(s)
- Shuhui Dai
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710000, China
- National Translational Science Center for Molecular Medicine and Department of Cell Biology, Fourth Military Medical University, Xi'an, 710000, China
| | - Yuan Feng
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710000, China
| | - Chuanhao Lu
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710000, China
| | - Hongchen Zhang
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710000, China
| | - Wenke Ma
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710000, China
- Department of Neurosurgery, The Central Hospital of Baoji, Baoji, 721000, China
| | - Wenyu Xie
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710000, China
| | - Xiuquan Wu
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710000, China
| | - Peng Luo
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710000, China
| | - Lei Zhang
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710000, China
| | - Fei Fei
- Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710000, China
| | - Zhou Fei
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710000, China.
| | - Xia Li
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, 710000, China.
| |
Collapse
|
2
|
Chen X, Song Y, Song W, Han J, Cao H, Xu X, Li S, Fu Y, Ding C, Lin F, Shi Y, Li J. Multi-omics reveal neuroprotection of Acer truncatum Bunge Seed extract on hypoxic-ischemia encephalopathy rats under high-altitude. Commun Biol 2023; 6:1001. [PMID: 37783835 PMCID: PMC10545756 DOI: 10.1038/s42003-023-05341-9] [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: 04/27/2023] [Accepted: 09/11/2023] [Indexed: 10/04/2023] Open
Abstract
Hypoxic-ischemic encephalopathy (HIE) at high-altitudes leads to neonatal mortality and long-term neurological complications without effective treatment. Acer truncatum Bunge Seed extract (ASO) is reported to have effect on cognitive improvement, but its molecular mechanisms on HIE are unclear. In this study, ASO administration contributed to reduced neuronal cell edema and improved motor ability in HIE rats at a simulated 4500-meter altitude. Transcriptomics and WGCNA analysis showed genes associated with lipid biosynthesis, redox homeostasis, neuronal growth, and synaptic plasticity regulated in the ASO group. Targeted and untargeted-lipidomics revealed decreased free fatty acids and increased phospholipids with favorable ω-3/ω-6/ω-9 fatty acid ratios, as well as reduced oxidized glycerophospholipids (OxGPs) in the ASO group. Combining multi-omics analysis demonstrated FA to FA-CoA, phospholipids metabolism, and lipid peroxidation were regulated by ASO treatment. Our results illuminated preliminary metabolism mechanism of ASO ingesting in rats, implying ASO administration as potential intervention strategy for HIE under high-altitude.
Collapse
Affiliation(s)
- Xianyang Chen
- Bao Feng Key Laboratory of Genetics and Metabolism, Beijing, China
| | - Yige Song
- Bao Feng Key Laboratory of Genetics and Metabolism, Beijing, China
| | - Wangting Song
- Bao Feng Key Laboratory of Genetics and Metabolism, Beijing, China
| | - Jiarui Han
- Bao Feng Key Laboratory of Genetics and Metabolism, Beijing, China
| | - Hongli Cao
- Department of Respiratory, Beijing Rehabilitation Hospital, Capital Medical University, Beijing, China
| | - Xiao Xu
- Department of Pediatrics, Shengjing Hospital of China Medical University, Plateau Medical Research Center of China Medical University, Shenyang, China
| | - Shujia Li
- Department of Pediatrics, Shengjing Hospital of China Medical University, Plateau Medical Research Center of China Medical University, Shenyang, China
| | - Yanmin Fu
- Department of Pediatrics, Shengjing Hospital of China Medical University, Plateau Medical Research Center of China Medical University, Shenyang, China
| | - Chunguang Ding
- National Center for Occupational Safety and Health, Beijing, China
| | - Feng Lin
- Department of Neurology, Sanming First Hospital Affiliated to Fujian Medical University, Sanming, Fujian, China
| | - Yuan Shi
- Department of Neonatology, Children's Hospital Affiliated Chongqing Medical University, Chongqing, China
| | - Jiujun Li
- Department of Pediatrics, Shengjing Hospital of China Medical University, Plateau Medical Research Center of China Medical University, Shenyang, China.
| |
Collapse
|
3
|
Han X, Hirschel A, Tsapekos M, Perez D, Vollmer D. In Vitro Assessment of Gold Nanoparticles on Telomerase Activity and Telomere Length in Human Fibroblasts. Int J Mol Sci 2023; 24:14273. [PMID: 37762576 PMCID: PMC10532081 DOI: 10.3390/ijms241814273] [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: 07/18/2023] [Revised: 09/14/2023] [Accepted: 09/15/2023] [Indexed: 09/29/2023] Open
Abstract
Telomerase activity coincides with lengthening of the ends of chromosomes known as telomeres. Telomere length is used as a marker for cellular aging. Telomeres shorten over time as cells divide, and certain bioactive compounds such as gold nanoparticles (AuNPs) may slow the shortening of telomeres by increasing telomerase activity. The objective of the present study is to assess the effect of AuNPs on telomerase activity and telomere length in human fibroblasts. Telomerase activity was measured using enzyme-linked immunosorbent assay (ELISA) in primary human lung fibroblasts (IMR90) and using quantitative PCR-based telomeric repeat amplification protocol (Q-TRAP) in primary human dermal fibroblasts, neonatal (HDFn). Telomere length was determined by Telomere Analysis Technology (TAT®)assay in HDFn. In IMR90, all AuNP treatments showed significant increases in telomerase activity when compared to earlier passages. HDFn treated with AuNPs at 0 ppm, 0.05 ppm, 0.5 ppm, or 5 ppm did not show significant differences in telomerase activity compared to the control group. Significant differences in telomere length in HDFn were observed at 2 weeks of 0.05 and 0.5 ppm AuNPs under oxidative culture conditions as compared to the control group. The study showed preliminary evidence that AuNPs may increase telomerase activity and decelerate the shortening of telomeres in human fibroblasts, suggesting its potential anti-aging effects, which warrants further investigation.
Collapse
Affiliation(s)
- Xuesheng Han
- Scientific Research Division, 4Life Research, Sandy, UT 84070, USA (D.V.)
| | - Alice Hirschel
- Scientific Research Division, 4Life Research, Sandy, UT 84070, USA (D.V.)
| | | | | | - David Vollmer
- Scientific Research Division, 4Life Research, Sandy, UT 84070, USA (D.V.)
| |
Collapse
|
4
|
Zhang N, Shentu Y, Zhu M, Wang H, Yin X, Du C, Xue F, Fan J, Gong Y, Fan X. Role of Ero1α in cognitive impairment induced by chronic hypoxia. Brain Res 2022; 1797:148117. [PMID: 36220374 DOI: 10.1016/j.brainres.2022.148117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 09/17/2022] [Accepted: 10/05/2022] [Indexed: 11/02/2022]
Abstract
Recent reports suggested the endoplasmic reticulum stress (ERS)-associated pathway is involved with cognitive impairment in hypoxia condition. ERO1-like protein alpha (Ero1α), an endoplasmic reticulum membrane-bound N-glycoprotein, has been reported to promote oxidative protein folding. However, no studies have reported whether the Ero1α is trapped in hypoxia-induced neuronal loss through the ERS-associated pathways. In our study, this effect of Ero1α was investigated using C57BL/6J mice, the HT22 cells and primary rat neurons. C57BL/6J mice were modeled in a hypoxic chamber for 4 weeks. Behavioral tests were then carried out to test cognitive functions, including the Morris water maze and fear conditioning test. Proteomics showed that Ero1α distinctly upregulated compared with normoxia group and verified using western blotting. Flow cytometry and immunofluorescence were used to analyze the neuroprotective effect of inhibitor EN460 of Ero1α in the HT22 cells. In C57BL/6J mice, hypoxia significantly caused cognitive decline. Brain slice staining results were also used to confirm this effect. Western blot analysis demonstrated that Ero1α, ERS-associated proteins and apoptosis-associated proteins significantly increased in the hypoxia treated groups, further proliferation-related marker protein decreased. EN460, a selective endoplasmic reticulum oxidation 1 (ERO1) inhibitor, counteracted neuronal apoptosis and ameliorated neuronal cell proliferation in the HT22 cells. Taken together, our data indicate that hypoxia induces cognitive impairment, at least in part, by upregulating Ero1α which contributes to neuronal apoptosis through ERS signaling pathway, providing preliminary experimental evidence that the Ero1α is a promising therapeutic target in hypoxia-induced cognitive deficits.
Collapse
Affiliation(s)
- Nan Zhang
- Institute of Hypoxia Medicine, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yangping Shentu
- Department of Pathology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Min Zhu
- Institute of Hypoxia Medicine, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Hui Wang
- Institute of Hypoxia Medicine, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Xianghong Yin
- Institute of Hypoxia Medicine, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Congkuo Du
- Institute of Hypoxia Medicine, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Feng Xue
- Institute of Hypoxia Medicine, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Junming Fan
- Institute of Hypoxia Medicine, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Yongsheng Gong
- Institute of Hypoxia Medicine, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China.
| | - Xiaofang Fan
- Institute of Hypoxia Medicine, School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China.
| |
Collapse
|