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Chang Z, Liu Q, Fan P, Xu W, Xie Y, Gong K, Zhang C, Zhao Z, Sun K, Shao G. Hypoxia preconditioning increases Notch1 activity by regulating DNA methylation in vitro and in vivo. Mol Biol Rep 2024; 51:507. [PMID: 38622406 DOI: 10.1007/s11033-024-09308-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 02/01/2024] [Indexed: 04/17/2024]
Abstract
BACKGROUND Our previous research has demonstrated that hypoxic preconditioning (HPC) can improve spatial learning and memory abilities in adult mice. Adult hippocampal neurogenesis has been associated with learning and memory. The Neurogenic locus notch homolog protein (Notch) was involved in adult hippocampal neurogenesis, as well as in learning and memory. It is currently unclear whether the Notch pathway regulates hippocampal neuroregeneration by modifying the DNA methylation status of the Notch gene following HPC. METHOD The HPC animal model and cell model were established through repeated hypoxia exposure using mice and the mouse hippocampal neuronal cell line HT22. Step-down test was conducted on HPC mice. Real-time PCR and Western blot analysis were used to assess the mRNA and protein expression levels of Notch1 and hairy and enhancer of split1 (HES1). The presence of BrdU-positive cells and Notch1 expression in the hippocampal dental gyrus (DG) were examined with confocal microscopy. The methylation status of the Notch1 was analyzed using methylation-specific PCR (MS-PCR). HT22 cells were employed to elucidate the impact of HPC on Notch1 in vitro. RESULTS HPC significantly improved the step-down test performance of mice with elevated levels of mRNA and protein expression of Notch1 and HES1 (P < 0.05). The intensities of the Notch1 signal in the control group, the H group and the HPC group were 2.62 ± 0.57 × 107, 2.87 ± 0.84 × 107, and 3.32 ± 0.14 × 107, respectively, and the number of BrdU (+) cells in the hippocampal DG were 1.83 ± 0.54, 3.71 ± 0.64, and 7.29 ± 0.68 respectively. Compared with that in C and H group, the intensity of the Notch1 signal and the number of BrdU (+) cells increased significantly in HPC group (P < 0.05). The methylation levels of the Notch1 promoter 0.82 ± 0.03, 0.65 ± 0.03, and 0.60 ± 0.02 in the C, H, and HPC groups, respectively. The methylation levels of Notch1 decreased significantly (P < 0.05). The effect of HPC on HT22 cells exhibited similarities to that observed in the hippocampus. CONCLUSION HPC may confer neuroprotection by activating the Notch1 signaling pathway and regulating its methylation level, resulting in the regeneration of hippocampal neurons.
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Affiliation(s)
- Zhehan Chang
- Center for Translational Medicine, The Third People's Hospital of Longgang District, Shenzhen, China
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou, China
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Qi Liu
- Department of Radiology, The Second Affiliated Hospital of Baotou Medical College, Baotou, China
| | - Peijia Fan
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Wenqiang Xu
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou, China
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Yabin Xie
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou, China
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Kerui Gong
- Department of Oral and Maxillofacial Surgery, University of California San Francisco, San Francisco, USA
| | - Chunyang Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Baotou Medical College, Baotou, China
| | - Zhijun Zhao
- Department of Neurosurgery, The First Affiliated Hospital of Baotou Medical College, Baotou, China.
| | - Kai Sun
- Center for Translational Medicine, The Third People's Hospital of Longgang District, Shenzhen, China.
| | - Guo Shao
- Center for Translational Medicine, The Third People's Hospital of Longgang District, Shenzhen, China.
- Inner Mongolia Key Laboratory of Hypoxic Translational Medicine, Baotou Medical College, Baotou, China.
- Beijing Key Laboratory of Hypoxic Conditioning Translational Medicine, Xuanwu Hospital, Capital Medical University, Beijing, China.
- Department of Neurosurgery, The First Affiliated Hospital of Baotou Medical College, Baotou, China.
- Joint Laboratory of South China Hospital Affiliated to Shenzhen University and Third People's Hospital of Longgang District, Shenzhen University, Shenzhen, China.
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Lu X, Zhan L, Chai G, Chen M, Sun W, Xu E. Hypoxic Preconditioning Attenuates Neuroinflammation via Inhibiting NF-κB/NLRP3 Axis Mediated by p-MLKL after Transient Global Cerebral Ischemia. Mol Neurobiol 2024; 61:1080-1099. [PMID: 37682454 DOI: 10.1007/s12035-023-03628-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 08/30/2023] [Indexed: 09/09/2023]
Abstract
Hypoxic preconditioning (HPC) has been reported to alleviate neuronal damage and microglial activation in hippocampal CA1 after transient global cerebral ischemia (tGCI). However, the molecular mechanism is unclear. Recent studies identified that nuclear factor-kappa-B (NF-κB)/oligomerization domain-like receptors protein (NLRP) 3 inflammasome pathway is mainly involved in the activation of microglia and that phosphorylated (p)-mixed lineage kinase domain-like (MLKL) is related to the regulation of NF-κB/NLRP3 axis. Hence, in this study, we set out to investigate whether HPC attenuates neuronal damage and microglial activation through inhibiting NF-κB/NLRP3 axis mediated by p-MLKL after tGCI in CA1 of male rats. We found that HPC decreased NLRP3 inflammasome in microglia and inhibited M1 polarization of microglia in CA1 after tGCI. Mechanistically, HPC inhibited the activation of NF-κB signaling pathway and reduced the mRNA and protein levels of NLRP3 inflammasome after tGCI. Additionally, the knockdown of p-MLKL by short hairpin RNA (shRNA) administration inhibited the activation of the NF-κB signaling pathway and reduced the formation of NLRP3 inflammasome, thus attenuating M1 polarization of microglia and decreasing the release of interleukin 1 beta (IL-1β) and necrosis factor alpha (TNF-α) in CA1 post ischemia. We consider that p-MLKL in microglia may be derived from necroptotic neurons after tGCI. In conclusion, the new finding in this study is that HPC-induced neuroprotection against tGCI through inhibiting NF-κB/NLRP3 pathway mediated by p-MLKL.
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Affiliation(s)
- Xiaomei Lu
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Lixuan Zhan
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Guorong Chai
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Meiyan Chen
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Weiwen Sun
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - En Xu
- Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China.
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Sharafkhaneh A, Agrawal R, Nambi V, BaHammam A, Razjouyan J. Obesity paradox or hypoxia preconditioning: How obstructive sleep apnea modifies the Obesity-MI relationship. Sleep Med 2023; 110:132-136. [PMID: 37574613 PMCID: PMC10529841 DOI: 10.1016/j.sleep.2023.07.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 07/17/2023] [Accepted: 07/27/2023] [Indexed: 08/15/2023]
Abstract
OBJECTIVES The objective of this study was to evaluate the interaction between obesity and obstructive sleep apnea on acute MI in hospital mortality. METHODS This retrospective cohort study utilized Veterans Health Administration data from years 1999-2020. Participants were categorized according to their body mass index (BMI) to non-obese (BMI <30) and obese (BMI ≥30) groups. Clinical obstructive sleep apnea (SA) diagnosis was confirmed using ICD9/10 codes and the study subgroups included non-obese with no obstructive sleep apnea (nOB-nSA), non-Obese with obstructive sleep apnea (nOB-SA), obese with no obstructive sleep apnea (OB-nSA), and obese with obstructive sleep apnea (OB-SA). The primary outcome was odds ratio of in-hospital mortality during the hospitalization with acute MI as the principal diagnosis adjusted for age, gender, race, ethnicity, and Charlson comorbidity index (CCI) with the nOB-nSA group as the comparison group. RESULTS Among 72,036 veterans with acute-MI hospitalization, individuals with obesity and obstructive sleep apnea (OB-SA) had the lowest in-hospital mortality rate (1.0%) compared to those without obesity and obstructive sleep apnea (nOB-nSA, 2.8%), with obesity but without obstructive sleep apnea (OB-nSA, 2.4%), and with obesity and obstructive sleep apnea (nOB-SA, 1.4%). The adjusted odds ratio for mortality, compared to nOB-nSA, was 9% higher but not significant in OB-nSA (aOR, 1.09, 95%CI: 0.95, 1.25), 46% lower in OB-nSA (aOR, 0.54, 95%CI: 0.45, 0.66), and 52% lower in OB-SA (aOR, 0.48: 95%CI: 0.41, 0.57). CONCLUSION Our data suggest that the association between obesity and improved survival in acute MI is largely driven by the presence of sleep apnea.
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Affiliation(s)
- Amir Sharafkhaneh
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA; Pulmonary, Critical Care and Sleep Medicine Section, Medical Care Line, Michael E. DeBakey VA Medical Center, Houston, TX, USA.
| | - Ritwick Agrawal
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA; Pulmonary, Critical Care and Sleep Medicine Section, Medical Care Line, Michael E. DeBakey VA Medical Center, Houston, TX, USA
| | - Vijay Nambi
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA; Cardiology Section, Medical Care Line, Michael E. DeBakey VA Medical Center, Houston, TX, USA
| | - Ahmed BaHammam
- Department of Medicine, University Sleep Disorders Center and Pulmonary Service, King Saud University, Riyadh, Saudi Arabia; Strategic Technologies Program of the National Plan for Sciences and Technology and Innovation in the Kingdom of Saudi Arabia, Saudi Arabia
| | - Javad Razjouyan
- Department of Medicine, Baylor College of Medicine, Houston, TX, USA; Center for Innovations in Quality, Effectiveness, and Safety, Michael E. DeBakey VA Medical Center, Houston, TX, USA; South Central Mental Illness Research, Education, and Clinical Center, Houston, TX, USA; Big Data Scientist Training Enhancement Program (BD-STEP), VA Office of Research and Development, Washington, DC, USA
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Mirzaei H, Salehi A, Javan B, Enayati A, Nabi MO, Zahedi M, Zengin G. Potentilla reptans L. preconditioning regulates H19 and MIAT long noncoding RNAs in H9C2 myoblasts Ischemia/Reperfusion model. BMC Complement Med Ther 2023; 23:272. [PMID: 37525174 PMCID: PMC10388489 DOI: 10.1186/s12906-023-04071-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 07/06/2023] [Indexed: 08/02/2023] Open
Abstract
The present study aimed to evaluate the effect of the ethyl acetate fraction of P. reptans root (PEF) preconditioning on expressions of lncRNAs H19 and MIAT in H9C2 myoblasts I/R injury.H9C2 cells were treated with different concentrations ranging from (10-400 µg/ml) of PEF for 24 h, followed by simulation of I/R condition. For I/R experiments, H9C2 cells were subjected with the oxygen and glucose deprivation for 2 h.H9C2 cell viability was significantly enhanced by PEF preconditioning under I/R condition in a concentration-dependent manner up to 200 µg/ml as a EC50. The PEF significantly diminished the expression of lncRNA MIAT and rate of apoptosis against the I/R group. In addition, PEF pretreated before stimulation I/R condition increased H19 expression compared to the normal PEF group with no statistically significant differences between groups. Hence, the results suggest that PEF can protect cardiomyocytes during hypoxia-induced myocardial cell injury by targeting specific involved genes.
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Affiliation(s)
- Hassan Mirzaei
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran.
| | - Aref Salehi
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Bita Javan
- Medical Cellular and Molecular Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Ayesheh Enayati
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran.
| | - Morteza Olad Nabi
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Mehdi Zahedi
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran.
| | - Gokhan Zengin
- Department of Biology, Science Faculty, Selcuk University, Konya, 42130, Turkey
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Mathew B, Acha LG, Torres LA, Huang CC, Liu A, Kalinin S, Leung K, Dai Y, Feinstein DL, Ravindran S, Roth S. MicroRNA-based engineering of mesenchymal stem cell extracellular vesicles for treatment of retinal ischemic disorders: Engineered extracellular vesiclesand retinal ischemia. Acta Biomater 2023; 158:782-797. [PMID: 36638942 PMCID: PMC10005109 DOI: 10.1016/j.actbio.2023.01.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 12/18/2022] [Accepted: 01/05/2023] [Indexed: 01/12/2023]
Abstract
Mesenchymal stem cell (MSCs)-derived extracellular vesicles (EVs) are emerging therapeutic tools. Hypoxic pre-conditioning (HPC) of MSCs altered the production of microRNAs (miRNAs) in EVs, and enhanced the cytoprotective, anti-inflammatory, and neuroprotective properties of their derivative EVs in retinal cells. EV miRNAs were identified as the primary contributors of these EV functions. Through miRNA seq analyses, miRNA-424 was identified as a candidate for the retina to overexpress in EVs for enhancing cytoprotection and anti-inflammatory effects. FEEs (functionally engineered EVs) overexpressing miR424 (FEE424) significantly enhanced neuroprotection and anti-inflammatory activities in vitro in retinal cells. FEE424 functioned by reducing inflammatory cytokine production in retinal microglia, and attenuating oxygen free radicals in retinal Muller cells and microvascular endothelial cells, providing a multi-pronged approach to enhancing recovery after retinal ischemic insult. In an in vivo model of retinal ischemia, native, HPC, and FEE424 MSC EVs robustly and similarly restored function to close to baseline, and prevented loss of retinal ganglion cells, but HPC EVs provided the most effective attenuation of apoptosis-related and inflammatory cytokine gene expression. These results indicate the potential for EV engineering to produce ameliorative effects for retinal diseases with a significant inflammatory component. STATEMENT OF SIGNIFICANCE: We show that functionally engineered extracellular vesicles (FEEs) from mesenchymal stem cells (MSCs) provide cytoprotection in rat retina subjected to ischemia. FEEs overexpressing microRNA 424 (FEE424) function by reducing inflammatory cytokine production in retinal microglia, and attenuating oxygen free radicals in Muller cells and microvascular endothelial cells, providing a multi-pronged approach to enhancing recovery. In an in vivo model of retinal ischemia in rats, native, hypoxic-preconditioned (HPC), and FEE424 MSC EVs robustly and similarly restored function, and prevented loss of retinal ganglion cells, but HPC EVs provided the most effective attenuation of apoptosis-related and inflammatory cytokine gene expression. The results indicate the potential for EV engineering to produce ameliorative effects for retinal diseases with a significant inflammatory component.
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Affiliation(s)
- Biji Mathew
- Department of Anesthesiology, College of Medicine, University of Illinois-Chicago
| | - Lorea Gamboa Acha
- Department of Anesthesiology, College of Medicine, University of Illinois-Chicago
| | - Leianne A Torres
- Department of Anesthesiology, College of Medicine, University of Illinois-Chicago
| | - Chun-Chieh Huang
- Department of Oral Biology, College of Dentistry, University of Illinois-Chicago
| | - Alice Liu
- Department of Anesthesiology, College of Medicine, University of Illinois-Chicago
| | - Sergey Kalinin
- Department of Anesthesiology, College of Medicine, University of Illinois-Chicago
| | - Kasey Leung
- Department of Oral Biology, College of Dentistry, University of Illinois-Chicago
| | - Yang Dai
- Department of Bioengineering, College of Engineering, University of Illinois-Chicago
| | - Douglas L Feinstein
- Department of Anesthesiology, College of Medicine, University of Illinois-Chicago; Jesse Brown Veterans Affairs, Chicago, IL
| | - Sriram Ravindran
- Department of Oral Biology, College of Dentistry, University of Illinois-Chicago.
| | - Steven Roth
- Department of Anesthesiology, College of Medicine, University of Illinois-Chicago.
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Zhang Z, Wu C, Yang J, Liu J, Yi Li, Liu L, Kong M, Zhang J, Jiang X. Hypoxic preconditioning promotes galvanotaxis of human dermal microvascular endothelial cells through NF-κB pathway. Heliyon 2022; 8:e12421. [PMID: 36643317 PMCID: PMC9834769 DOI: 10.1016/j.heliyon.2022.e12421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 11/11/2022] [Accepted: 12/09/2022] [Indexed: 12/24/2022] Open
Abstract
Angiogenesis plays an important role in wound healing, especially in chronic wound. The directional migration of the human dermal microvascular endothelial cells (HDMECs) is the key regulation of angiogenesis. The wound healing can be regulated by numerous microenvironment factors including the electric fields, hypoxia and chemotaxis. During wound repair, the electric fields mediates the directional migration of cells and the hypoxia, which occurs immediately after injury, acts as an early stimulus to initiate the healing process. However, the mechanism of hypoxia and the endogenous electric fields coordinating to promote angiogenesis remain elusive. In this study, we observed the effect of hypoxia on the directional migration of HDMECs under electric fields. The galvanotaxis of HDMECs under the electric fields (200 mV/mm) was significantly improved, and the expression of VEGF/VEGFR2 was up-regulated after 4h of hypoxic preconditioning. In addition, the knockdown of VEGFR2 reversed the directivity of HDMECs promoted by hypoxia in the electric fields. Moreover, knockdown of VEGFR2 inhibited the migration directionality of HDMECs in the electric field after hypoxic preconditioning. Hypoxia decreased the activation of NF-κB in HDMECs. Activated NF-κB by fusicoccin decreased the expression of VEGFR2/VEGF and negatively regulated the migration direction of HDMECs in the electric fields. Enhancing the galvanotaxis response of cells might therefore be a clinically attractive approach to induce improved angiogenesis.
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Affiliation(s)
- Ze Zhang
- Department of Plastic Surgery, State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Chao Wu
- Department of Plastic Surgery, State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Jinrui Yang
- Department of Plastic Surgery, State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Jie Liu
- Department of Plastic Surgery, State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Yi Li
- Department of Plastic Surgery, Lanzhou University Second Hospital, Lanzhou, 730030, China
| | - Luojia Liu
- Department of Plastic Surgery, State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Meng Kong
- Department of Plastic Surgery, State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China
| | - Jiaping Zhang
- Department of Plastic Surgery, State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China,Corresponding author.
| | - Xupin Jiang
- Department of Plastic Surgery, State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing 400038, China,Corresponding author.
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Song H, Li B, Guo R, He S, Peng Z, Qu J, Zhao Y, Zhai X, Yin W, Yang K, Fan X, Zhang J, Tan J, Liu Y, Xie J, Xu J. Hypoxic preconditioned aged BMSCs accelerates MI injury repair by modulating inflammation, oxidative stress and apoptosis. Biochem Biophys Res Commun 2022; 627:45-51. [PMID: 36007334 DOI: 10.1016/j.bbrc.2022.08.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 08/12/2022] [Indexed: 11/25/2022]
Abstract
The benefits of autologous cell therapy for cardiac repair are diminished in aged individuals due to the limited quality and poor tolerance of aged stem cells in the ischemic micro-environment. The safe and efficient methods to improve the therapeutic effect of aged stem cells are needed to treat the increasing number of aged patients with cardiac diseases. In the present study, we aimed to determine whether hypoxic preconditioning can improve the therapeutic effect of aged stem cells even if the responsiveness of aged MSCs is poor, and to seek the underlying mechanism. Using a murine model of MI, our results showed that hypoxic preconditioning promoted the therapeutic effect of aged BMSCs, which was expressed in improved cardiac function, decreased scar size and alleviated cardiac remodeling in vivo. This in vivo effect of hypoxic preconditioned aged BMSCs was associated with alleviated inflammation, oxidative stress and apoptosis in infarcted heart. In vitro studies confirmed that hypoxic preconditioned aged BMSCs exert cytoprotective impacts on H9C2 cells against lethal hypoxia injury via attenuating oxidative stress and apoptosis. Our data support the promise of hypoxic preconditioning as a potential strategy to improve autologous stem cell therapy for ischemic heart injury in aged individuals.
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Affiliation(s)
- Huifang Song
- Department of Hepatological Surgery, First Hospital of Shanxi Medical University, Taiyuan, China; Department of Anatomy, Shanxi Medical University, Taiyuan, China; Shanxi Key Laboratory of Birth Defect and Cell Regeneration, Shanxi Medical University, Taiyuan, China.
| | - Bin Li
- Department of Anatomy, Shanxi Medical University, Taiyuan, China
| | - Rui Guo
- Department of Pathology, Shanxi Province Cancer Hospital, Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affiliated to Shanxi Medical University, Taiyuan, China
| | - Sheng He
- Shanxi Key Laboratory of Birth Defect and Cell Regeneration, Shanxi Medical University, Taiyuan, China
| | - Zexu Peng
- Shanxi Key Laboratory of Birth Defect and Cell Regeneration, Shanxi Medical University, Taiyuan, China
| | - Junyuan Qu
- Department of Pathology, Shanxi Province Cancer Hospital, Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affiliated to Shanxi Medical University, Taiyuan, China
| | - Yunhe Zhao
- Department of Anatomy, Shanxi Medical University, Taiyuan, China
| | - Xiaoyan Zhai
- Shanxi Key Laboratory of Birth Defect and Cell Regeneration, Shanxi Medical University, Taiyuan, China
| | - Wenjuan Yin
- Shanxi Key Laboratory of Birth Defect and Cell Regeneration, Shanxi Medical University, Taiyuan, China
| | - Kun Yang
- Shanxi Key Laboratory of Birth Defect and Cell Regeneration, Shanxi Medical University, Taiyuan, China
| | - Xuemei Fan
- Shanxi Key Laboratory of Birth Defect and Cell Regeneration, Shanxi Medical University, Taiyuan, China
| | - Jie Zhang
- Shanxi Key Laboratory of Birth Defect and Cell Regeneration, Shanxi Medical University, Taiyuan, China
| | - Jiayin Tan
- Department of Anatomy, Shanxi Medical University, Taiyuan, China
| | - Yang Liu
- Department of Anatomy, Shanxi Medical University, Taiyuan, China
| | - Jun Xie
- Shanxi Key Laboratory of Birth Defect and Cell Regeneration, Shanxi Medical University, Taiyuan, China.
| | - Jun Xu
- Department of Hepatological Surgery, First Hospital of Shanxi Medical University, Taiyuan, China.
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Seo H, Choi HJ, Kim OH, Park JH, Hong HE, Kim SJ. The secretome obtained under hypoxic preconditioning from human adipose-derived stem cells exerts promoted anti-apoptotic potentials through upregulated autophagic process. Mol Biol Rep 2022. [PMID: 35941418 DOI: 10.1007/s11033-022-07736-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 06/14/2022] [Accepted: 06/22/2022] [Indexed: 11/09/2022]
Abstract
BACKGROUND Hypoxic preconditioning (HP) is a stem cell preconditioning modality designed to augment the therapeutic effects of mesenchymal stem cells (MSCs). Although autophagy is expected to play a role in HP, very little is known regarding the relationship between HP and autophagy. METHODS AND RESULTS The adipose-derived stem cell (ASC)-secretome obtained under normoxia (NCM) and ASC-secretome obtained under HP (HCM) were obtained by culturing ASCs for 24 h under normoxic (21% partial pressure of O2) and hypoxic (1% partial pressure of O2) conditions, respectively. Subsequently, to determine the in vivo effects of HCM, each secretome was injected into 70% partially hepatectomized mice, and liver specimens were obtained. HCM significantly reduced the apoptosis of thioacetamide-treated AML12 hepatocytes and promoted the autophagic processes of the cells (P < 0.05). Autophagy blockage by either bafilomycin A1 or ATG5 siRNA significantly abrogated the anti-apoptotic effect of HCM (P < 0.05), demonstrating that HCM exerts its anti-apoptotic effect by promoting autophagy. The effect of HCM - reduction of cell apoptosis and promotion of autophagic process - was also demonstrated in a mouse model. CONCLUSIONS HP appears to induce ASCs to release a secretome with enhanced anti-apoptotic effects by promoting the autophagic process of ASCs.
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Fan X, Wei H, Du J, Lu X, Wang L. Hypoxic preconditioning neural stem cell transplantation promotes spinal cord injury in rats by affecting transmembrane immunoglobulin domain-containing. Hum Exp Toxicol 2022; 41:9603271211066587. [PMID: 35243930 DOI: 10.1177/09603271211066587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE To explore the effects of hypoxic preconditioning neural stem cell (P-NSC) transplantation on rats with spinal cord injury (SCI). METHODS After identification, the NSCs were treated with hypoxic preconditioning. The NSCs migration was detected by Transwell method. RT-qPCR was used to detect the mRNA levels of HIF-1α, CXCR4 in NSC. The secretion of representative neurotrophic factors (VEGF, HGF, and BDNF) was checked by Western blot. Forty-six SCI rats were randomly divided into three experimental groups: SCI group (PBS injection, n = 10); N-NSC group (NSC atmospheric normoxic pretreatment injection, n = 18); and P-NSC group (NSC 's hypoxic preconditioning injection, n = 18). The sham operation group was also included (rats underwent laminectomy but not SCI, n = 10). The recovery of hindlimb motor function was evaluated by BBB score. The level of spinal cord inflammation (IL-1β, TNF-α, and IL-6) was determined by ELISA. Western blot was used to detect the content of TMIGD1 and TMIGD3 in spinal cord. RESULTS Compared with the N-NSC group, the number of NSC-passing membranes in the P-NSC group increased with the increase of the culture time (p < 0.05). Compared with N-NSC, P-NSC had higher levels of VEGF, HGF, and BDNF after 1 week of culture (p < 0.05). The BBB score of the P-NSC group was significantly higher than that of the N-NSC group at 7 and 28 days (p < 0.05). Compared with the SCI group, the levels of TNF-α, IL-1β, and IL-6 were significantly reduced after NSC treatment, and the P-NSC group was lower than the N-NSC group (p < 0.05). Compared with the SCI group, the levels of TMIGD1 and TMIGD3 increased. Compared with the N-NSC group, and the levels of TMIGD1 and TMIGD3 increased in the P-NSC group (p < 0.05). CONCLUSION P-NSC administration could improve SCI injury, and the levels of TMIGD1 and TMIGD3.
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Affiliation(s)
- Xiaoguang Fan
- The Second Department of Spine Surgery, 519688Yantaishan Hospital, Yantai, China
| | - Hongchun Wei
- Department of Neurology, 117747the Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, China
| | - Juan Du
- Department of Neurology, 519688Yantaishan Hospital, Yantai, China
| | - Xiuguo Lu
- Department of spine surgery, Yantai Yeda Hospital, Yantai, China
| | - Leisheng Wang
- The Second Department of Spine Surgery, 519688Yantaishan Hospital, Yantai, China
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10
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Ishiuchi N, Nakashima A, Doi S, Kanai R, Maeda S, Takahashi S, Nagao M, Masaki T. Serum-free medium and hypoxic preconditioning synergistically enhance the therapeutic effects of mesenchymal stem cells on experimental renal fibrosis. Stem Cell Res Ther 2021; 12:472. [PMID: 34425892 PMCID: PMC8381539 DOI: 10.1186/s13287-021-02548-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 08/08/2021] [Indexed: 01/27/2023] Open
Abstract
Background Mesenchymal stem cells (MSCs) repair injured tissue in a paracrine manner. To enhance their therapeutic properties, preconditioning with various factors has been researched. We have previously showed that MSCs cultured in serum-free medium (SF-MSCs) promote their immunosuppressive ability, thereby enhancing their anti-fibrotic effect. Here, we examined whether serum-free medium and hypoxic preconditioning synergistically enhance the therapeutic effects of MSCs on renal fibrosis in rats with ischemia–reperfusion injury (IRI). Methods SF-MSCs were incubated under 1% O2 conditions (hypo-SF-MSCs) or 21% O2 conditions (normo-SF-MSCs) for 24 h before collection. After IRI procedure, hypo-SF-MSCs or normo-SF-MSCs were injected through the abdominal aorta. At 7 or 21 days post-injection, the rats were killed and their kidneys were collected to evaluate inflammation and fibrosis. In in vitro experiments, we investigated whether hypo-SF-MSCs enhanced secretion of anti-fibrotic humoral factors using transforming growth factor (TGF)-β1-stimulated HK-2 cells incubated with conditioned medium from hypo-SF-MSCs or normo-SF-MSCs. Results Normo-SF-MSCs showed attenuation of senescence, which increased their proliferative capacity. Although no significant difference in cellular senescence was found between normo-SF-MSCs and hypo-SF-MSCs, hypo-SF-MSCs further increased their proliferative capacity compared with normo-SF-MSCs. Additionally, administration of hypo-SF-MSCs more strongly ameliorated renal fibrosis than that of normo-SF-MSCs. Moreover, although hypo-SF-MSCs strongly attenuated infiltration of inflammatory cells compared with the control rats, which were treated with PBS, this attenuation was almost equal between normo-SF-MSCs and hypo-SF-MSCs. In vitro experiments revealed that hypo-SF-MSCs more significantly inhibited transforming growth factor (TGF)-β/Smad signaling compared with normo-SF-MSCs. Moreover, hypoxic preconditioning increased hepatocyte growth factor (HGF) secretion even under serum-free conditions, whereas knockdown of HGF in hypo-SF-MSCs attenuated inhibition of TGF-β/Smad signaling. Conclusions These results indicate that administration of ex vivo-expanded, hypoxia-preconditioned SF-MSCs may be a useful cell therapy to prevent renal fibrosis. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-021-02548-7.
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Affiliation(s)
- Naoki Ishiuchi
- Department of Nephrology, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8551, Japan.,Center for Cause of Death Investigation Research, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8553, Japan.,Department of Forensic Medicine, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8553, Japan
| | - Ayumu Nakashima
- Department of Nephrology, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8551, Japan. .,Department of Stem Cell Biology and Medicine, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8553, Japan.
| | - Shigehiro Doi
- Department of Nephrology, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8551, Japan
| | - Ryo Kanai
- Department of Nephrology, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8551, Japan
| | - Satoshi Maeda
- Department of Stem Cell Biology and Medicine, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8553, Japan.,TWOCELLS Company, Limited, 16-35 Hijiyama-honmachi, Minami-ku, Hiroshima, 732-0816, Japan
| | - Shinya Takahashi
- Department of Surgery, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8553, Japan
| | - Masataka Nagao
- Department of Forensic Medicine, Graduate School of Biomedical & Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8553, Japan
| | - Takao Masaki
- Department of Nephrology, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima, Hiroshima, 734-8551, Japan.
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Liu J, He J, Ge L, Xiao H, Huang Y, Zeng L, Jiang Z, Lu M, Hu Z. Hypoxic preconditioning rejuvenates mesenchymal stem cells and enhances neuroprotection following intracerebral hemorrhage via the miR-326-mediated autophagy. Stem Cell Res Ther 2021; 12:413. [PMID: 34294127 PMCID: PMC8296710 DOI: 10.1186/s13287-021-02480-w] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 06/27/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Intracerebral hemorrhage (ICH) is a major public health concern, and mesenchymal stem cells (MSCs) hold great potential for treating ICH. However, the quantity and quality of MSCs decline in the cerebral niche, limiting the potential efficacy of MSCs. Hypoxic preconditioning is suggested to enhance the survival of MSCs and augment the therapeutic efficacy of MSCs in ICH. MicroRNAs (miRNAs) are known to mediate cellular senescence. However, the precise mechanism by which miRNAs regulate the senescence of hypoxic MSCs remains to be further studied. In the present study, we evaluated whether hypoxic preconditioning enhances the survival and therapeutic effects of olfactory mucosa MSC (OM-MSC) survival and therapeutic effects in ICH and investigated the mechanisms by which miRNA ameliorates hypoxic OM-MSC senescence. METHODS In the in vivo model, ICH was induced in mice by administration of collagenase IV. At 24 h post-ICH, 5 × 105 normoxia or hypoxia OM-MSCs or saline was administered intracerebrally. The behavioral outcome, neuronal apoptosis, and OM-MSC survival were evaluated. In the in vitro model, OM-MSCs were exposed to hemin. Cellular senescence was examined by evaluating the expressions of P16INK4A, P21, P53, and by β-galactosidase staining. Microarray and bioinformatic analyses were performed to investigate the differences in the miRNA expression profiles between the normoxia and hypoxia OM-MSCs. Autophagy was confirmed using the protein expression levels of LC3, P62, and Beclin-1. RESULTS In the in vivo model, transplanted OM-MSCs with hypoxic preconditioning exhibited increased survival and tissue-protective capability. In the in vitro model, hypoxia preconditioning decreased the senescence of OM-MSCs exposed to hemin. Bioinformatic analysis identified that microRNA-326 (miR-326) expression was significantly increased in the hypoxia OM-MSCs compared with that of normoxia OM-MSCs. Upregulation of miR-326 alleviated normoxia OM-MSC senescence, whereas miR-326 downregulation increased hypoxia OM-MSC senescence. Furthermore, we showed that miR-326 alleviated cellular senescence by upregulating autophagy. Mechanistically, miR-326 promoted the autophagy of OM-MSCs via the PI3K signaling pathway by targeting polypyrimidine tract-binding protein 1 (PTBP1). CONCLUSIONS Our study shows that hypoxic preconditioning delays OM-MSC senescence and augments the therapeutic efficacy of OM-MSCs in ICH by upregulating the miR-326/PTBP1/PI3K-mediated autophagy.
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Affiliation(s)
- Jianyang Liu
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jialin He
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Lite Ge
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Han Xiao
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yan Huang
- National Health Commission Key Laboratory of Birth Defects Research, Prevention, and Treatment, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, Hunan, China
| | - Liuwang Zeng
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zheng Jiang
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ming Lu
- Developmental Biology of Ministry of Education, College of Life Sciences, Hunan Normal University, Changsha, Hunan, China. .,Hunan Provincial Key Laboratory of Neurorestoratology, Second Affiliated Hospital of Hunan Normal University, Changsha, Hunan, China.
| | - Zhiping Hu
- Department of Neurology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.
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12
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Wang X, Huang L, Gao H. Effects of hypoxic preconditioning combined with altitude training on CD55, CD59 and the immune function of swimmers. Ann Palliat Med 2021; 10:509-517. [PMID: 33545782 DOI: 10.21037/apm-20-2379] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 01/17/2021] [Indexed: 11/06/2022]
Abstract
BACKGROUND Hypoxic preconditioning refers to a certain intensity and time of hypoxic exposure before hypoxic stress, which makes the body produce endogenous protection to enhance the body's tolerance to subsequent more severe hypoxia. However, there are few studies on the effects of hypoxic preconditioning combined with altitude training on the immune system of athletes. METHODS Nine swimmers from Shanghai underwent 3-week hypoxic preconditioning [living high-training low (HiLo)] combined with 3-week altitude training. CD55 and CD59 expression in red blood cells (RBCs), CD55 and CD59 expression in white blood cells (WBCs), RBC count, WBC count, T lymphocyte CD3, CD4, CD8 expression, and immunoglobulins IgG, IgM, and IgA were measured 4 times: before the start of hypoxic preconditioning, in the first week of hypoxic preconditioning, at the end of hypoxic preconditioning (i.e., before the start of altitude training), and at the end of altitude training. RESULTS CD55 and CD59 expression in RBCs significantly increased in the first week of hypoxic preconditioning (P<0.05), returned to baseline levels at the end of preconditioning, and significantly increased again during altitude training (P<0.05). CD55 and CD59 expression in WBCs decreased significantly during hypoxic preconditioning (P<0.05) and increased significantly during altitude training (P<0.05). CD3 expression first decreased and then increased in the hypoxic preconditioning phase, then decreased again in the altitude training phase. However, there was no significant difference in each phase. CD4/CD8 expression after altitude training was significantly lower than that before altitude training (P<0.05), but was not significantly different from that before the start of hypoxic preconditioning. IgG, IgM, and IgA did not fluctuate significantly throughout the experimental phase. CONCLUSIONS After hypoxic preconditioning combined with altitude training, the expression of CD55 and CD59 on the surface of RBCs and WBCs increased significantly, and T lymphocyte CD4/CD8 expression also increased. These results suggest an improvement in the complement regulation system and RBC immune function. Hypoxic preconditioning can therefore improve immunity and enhance the physical function of athletes during altitude training.
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Affiliation(s)
- Xi Wang
- Laboratory of Hypoxia, Shanghai Research Institute of Sports Science, Shanghai, China; Shanghai Anti-doping Agency, Shanghai, China
| | - Lin Huang
- Department of Physical Education, Shanghai Dianji University, Shanghai, China.
| | - Huan Gao
- Laboratory of Hypoxia, Shanghai Research Institute of Sports Science, Shanghai, China; Shanghai Anti-doping Agency, Shanghai, China
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Li J, Zhao H, Xing Y, Zhao T, Cai L, Yan Z. A Genome-Wide Analysis of the Gene Expression and Alternative Splicing Events in a Whole-Body Hypoxic Preconditioning Mouse Model. Neurochem Res 2021; 46:1101-1111. [PMID: 33582968 DOI: 10.1007/s11064-021-03241-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 12/07/2020] [Accepted: 01/07/2021] [Indexed: 12/13/2022]
Abstract
Exposure to specific doses of hypoxia can trigger endogenous neuroprotective and neuroplastic mechanisms of the central nervous system. These molecular mechanisms, together referred to as hypoxic preconditioning (HPC), remain poorly understood. In the present study, we applied RNA sequencing and bioinformatics analyses to study HPC in a whole-body HPC mouse model. The preconditioned (H4) and control (H0) groups showed 605 differentially expressed genes (DEGs), of which 263 were upregulated and 342 were downregulated. Gene Ontology enrichment analysis indicated that these DEGs were enriched in several biological processes, including metabolic stress and angiogenesis. The Kyoto Encyclopedia of Genes and Genomes enrichment analysis showed that the FOXO and Notch signaling pathways were involved in hypoxic tolerance and protection during HPC. Furthermore, 117 differential alternative splicing events (DASEs) were identified, with exon skipping being the dominant one (48.51%). Repeated exposure to systemic hypoxia promoted skipping of exon 7 in Edrf1 and exon 9 or 13 in Lrrc45. This study expands the understanding of the endogenous protective mechanisms of HPC and the DASEs that occur during HPC.
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Affiliation(s)
- Jun Li
- College of Science, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou, 014010, People's Republic of China
- Inner Mongolia Key Laboratory of Functional Genome Bioinformatics, Inner Mongolia University of Science and Technology, Baotou, 014010, People's Republic of China
| | - Hongyu Zhao
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou, 014010, People's Republic of China
- Inner Mongolia Key Laboratory of Functional Genome Bioinformatics, Inner Mongolia University of Science and Technology, Baotou, 014010, People's Republic of China
| | - Yongqiang Xing
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou, 014010, People's Republic of China
- Inner Mongolia Key Laboratory of Functional Genome Bioinformatics, Inner Mongolia University of Science and Technology, Baotou, 014010, People's Republic of China
| | - Tongling Zhao
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou, 014010, People's Republic of China
- Inner Mongolia Key Laboratory of Functional Genome Bioinformatics, Inner Mongolia University of Science and Technology, Baotou, 014010, People's Republic of China
| | - Lu Cai
- School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou, 014010, People's Republic of China.
- Inner Mongolia Key Laboratory of Functional Genome Bioinformatics, Inner Mongolia University of Science and Technology, Baotou, 014010, People's Republic of China.
| | - Zuwei Yan
- College of Science, Inner Mongolia Agricultural University, Hohhot, 010018, People's Republic of China.
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Zhan L, Lu X, Xu W, Sun W, Xu E. Inhibition of MLKL-dependent necroptosis via downregulating interleukin-1R1 contributes to neuroprotection of hypoxic preconditioning in transient global cerebral ischemic rats. J Neuroinflammation 2021; 18:97. [PMID: 33879157 PMCID: PMC8056617 DOI: 10.1186/s12974-021-02141-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 03/26/2021] [Indexed: 11/30/2022] Open
Abstract
Background Our previous study indicated that hypoxic preconditioning reduced receptor interacting protein (RIP) 3-mediated necroptotic neuronal death in hippocampal CA1 of adult rats after transient global cerebral ischemia (tGCI). Although mixed lineage kinase domain-like (MLKL) has emerged as a crucial molecule for necroptosis induction downstream of RIP3, how MLKL executes necroptosis is not yet well understood. In this study, we aim to elucidate the molecular mechanism underlying hypoxic preconditioning that inactivates MLKL-dependent neuronal necroptosis after tGCI. Methods Transient global cerebral ischemia was induced by the four-vessel occlusion method. Twenty-four hours before ischemia, rats were exposed to systemic hypoxia with 8% O2 for 30 min. Western blotting was used to detect the expression of MLKL and interleukin-1 type 1 receptor (IL-1R1) in CA1. Immunoprecipitation was used to assess the interactions among IL-1R1, RIP3, and phosphorylated MLKL (p-MLKL). The concentration of intracellular free calcium ion (Ca2+) was measured using Fluo-4 AM. Silencing and overexpression studies were used to study the role of p-MLKL in tGCI-induced neuronal death. Results Hypoxic preconditioning decreased the phosphorylation of MLKL both in neurons and microglia of CA1 after tGCI. The knockdown of MLKL with siRNA decreased the expression of p-MLKL and exerted neuroprotective effects after tGCI, whereas treatment with lentiviral delivery of MLKL showed opposite results. Mechanistically, hypoxic preconditioning or MLKL siRNA attenuated the RIP3-p-MLKL interaction, reduced the plasma membrane translocation of p-MLKL, and blocked Ca2+ influx after tGCI. Furthermore, hypoxic preconditioning downregulated the expression of IL-1R1 in CA1 after tGCI. Additionally, neutralizing IL-1R1 with its antagonist disrupted the interaction between IL-1R1 and the necrosome, attenuated the expression and the plasma membrane translocation of p-MLKL, thus alleviating neuronal death after tGCI. Conclusions These data support that the inhibition of MLKL-dependent neuronal necroptosis through downregulating IL-1R1 contributes to neuroprotection of hypoxic preconditioning against tGCI. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-021-02141-y.
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Affiliation(s)
- Lixuan Zhan
- Institute of Neurosciences and Department of Neurology of The Second Affiliated Hospital of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, 250 Changgang Dong RD, Guangzhou, 510260, People's Republic of China
| | - Xiaomei Lu
- Institute of Neurosciences and Department of Neurology of The Second Affiliated Hospital of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, 250 Changgang Dong RD, Guangzhou, 510260, People's Republic of China
| | - Wensheng Xu
- Institute of Neurosciences and Department of Neurology of The Second Affiliated Hospital of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, 250 Changgang Dong RD, Guangzhou, 510260, People's Republic of China
| | - Weiwen Sun
- Institute of Neurosciences and Department of Neurology of The Second Affiliated Hospital of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, 250 Changgang Dong RD, Guangzhou, 510260, People's Republic of China
| | - En Xu
- Institute of Neurosciences and Department of Neurology of The Second Affiliated Hospital of Guangzhou Medical University and Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, 250 Changgang Dong RD, Guangzhou, 510260, People's Republic of China.
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Yu H, Xu Z, Qu G, Wang H, Lin L, Li X, Xie X, Lei Y, He X, Chen Y, Li Y. Hypoxic Preconditioning Enhances the Efficacy of Mesenchymal Stem Cells-Derived Conditioned Medium in Switching Microglia toward Anti-inflammatory Polarization in Ischemia/Reperfusion. Cell Mol Neurobiol 2021; 41:505-524. [PMID: 32424775 DOI: 10.1007/s10571-020-00868-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 05/05/2020] [Indexed: 02/07/2023]
Abstract
Activation of pro-inflammatory microglia is an important mechanism of the cerebral ischemia-reperfusion (I/R)-induced neuronal injury and dysfunction. Mesenchymal stem cells (MSCs) together with their paracrine factors demonstrated curative potential in immune disorders and inflammatory diseases, as well as in ischemic diseases. However, it remains unclear whether conditioned medium from MSCs could effectively regulate the activation and polarization of microglia exposed to I/R stimulation. In this study, we investigated the effects of conditioned medium from bone marrow MSCs (BMSCs-CM) on I/R-stimulated microglia and the potential mechanism involved, as well as the way to obtain more effective BMSCs-CM. First, cell model of oxygen-glucose deprivation/reoxygenation (OGD/R) was established in microglia to mimic the I/R. BMSCs-CM from different culture conditions (normoxic: 21% O2; hypoxic: 1% O2; hypoxia preconditioning: preconditioning with 1% O2 for 24 h) was used to treat the microglia. Our results showed that BMSCs-CM effectively promoted the survival and alleviated the injury of microglia. Moreover, in microglia exposed to OGD/R, BMSCs-CM inhibited significantly the expression of pro-inflammatory cytokines (TNF-α, IL-1β, and IL-6), CD86 and inducible nitric oxide synthase, whereas upregulated the levels of anti-inflammatory cytokine (IL-10), CD206 and Arginase-1. These results suggested that BMSCs-CM promoted the polarization of anti-inflammatory microglia. In particular, BMSCs-CM from cultures with hypoxia preconditioning was more effective in alleviating cell injury and promoting anti-inflammatory microglia polarization than BMSCs-CM from normoxic cultures and from hypoxic cultures. Furthermore, inhibition of exosomes secretion could largely mitigate these effects of BMSCs-CM. In conclusion, our results suggested that hypoxia preconditioning of BMSCs could enhance the efficacy of BMSCs-CM in alleviating OGD/R-induced injury and in promoting the anti-inflammatory polarization of microglia, and these beneficial effects of BMSCs-CM owed substantially to exosomes.
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Affiliation(s)
- Han Yu
- Department of Pathophysiology & Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
- Department of Pathology, The Affiliated Hospital of Hubei University of Medicine, The First People's Hospital of Xiangyang, Xiangyang, 441000, China
| | - Zhihong Xu
- Department of Pathophysiology & Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Gaojing Qu
- Department of Pathophysiology & Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Huimin Wang
- Department of Pathophysiology & Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Lulu Lin
- Department of Pathophysiology & Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Xianyu Li
- Department of Pathophysiology & Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Xiaolin Xie
- Department of Pathophysiology & Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Yifeng Lei
- The Institute of Technological Sciences & School of Power and Mechanical Engineering, Wuhan University, Wuhan, 430072, China
| | - Xiaohua He
- Department of Pathophysiology & Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Yun Chen
- Department of Biomedical Engineering, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Yinping Li
- Department of Pathophysiology & Hubei Province Key Laboratory of Allergy and Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China.
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Zhou P, Liu H, Liu X, Ling X, Xiao Z, Zhu P, Zhu Y, Lu J, Zheng S. Donor heart preservation with hypoxic-conditioned medium-derived from bone marrow mesenchymal stem cells improves cardiac function in a heart transplantation model. Stem Cell Res Ther 2021; 12:56. [PMID: 33435991 PMCID: PMC7805188 DOI: 10.1186/s13287-020-02114-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 12/21/2020] [Indexed: 12/12/2022] Open
Abstract
Background In heart transplantation, donor hearts inevitably suffer from ischemia/reperfusion (I/R) injury, which leads to primary graft dysfunction and affects patients’ survival rate. Bone marrow mesenchymal stem cells (BMSCs) have been reported to attenuate myocardial I/R injury via their paracrine effects, which can be enhanced by hypoxic preconditioning. We hypothesized that the donor heart preservation with hypoxic conditioned medium (CdM) derived from BMSCs would improve post-transplant graft function. Methods Normoxic or hypoxic CdM were isolated from rat BMSCs cultured under normoxic (20% O2) or hypoxic (1% O2) condition. Donor hearts were explanted; stored in cardioplegic solution supplemented with either a medium (vehicle), normoxic CdM (N-CdM), or hypoxic CdM (H-CdM); and then heterotopically transplanted. Antibody arrays were performed to compare the differences between hypoxic and normoxic CdM. Results After heart transplantation, the donor heart preservation with normoxic CdM was associated with a shorter time to return of spontaneous contraction and left ventricular systolic diameter, lower histopathological scores, higher ejection fraction, and fractional shortening of the transplanted hearts. The cardioprotective effects may be associated with the inhibition of apoptosis and inflammation, as reflected by less TUNEL-positive cells and lower levels of plasma proinflammatory cytokines (interleukin-1β, interleukin-6, tumor necrosis factor-α) and cardiac troponin I in the N-CdM group compared with the vehicle group. These therapeutic effects can be further enhanced by hypoxic preconditioning. Antibody arrays revealed that nine proteins were significantly increased in hypoxic CdM compared with normoxic CdM. Furthermore, compared with vehicle and N-CdM groups, the protein levels of PI3K and p-Akt/Akt ratio in the transplanted hearts significantly increased in the H-CdM group. However, no significant difference was found in the phosphorylation of Smad2 and Smad3 for the donor hearts among the three groups. Conclusions Our results indicate that the cardioplegic solution-enriched with hypoxic CdM can be a novel and promising preservation solution for donor hearts.
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Affiliation(s)
- Pengyu Zhou
- Department of Cardiovascular Surgery, Nanfang Hospital, Southern Medical University, No.1838 North Guangzhou Avenue, Baiyun District, Guangzhou, People's Republic of China
| | - Hao Liu
- Department of Cardiovascular Surgery, Nanfang Hospital, Southern Medical University, No.1838 North Guangzhou Avenue, Baiyun District, Guangzhou, People's Republic of China
| | - Ximao Liu
- Department of Cardiovascular Surgery, Nanfang Hospital, Southern Medical University, No.1838 North Guangzhou Avenue, Baiyun District, Guangzhou, People's Republic of China
| | - Xiao Ling
- Department of Cardiovascular Surgery, Nanfang Hospital, Southern Medical University, No.1838 North Guangzhou Avenue, Baiyun District, Guangzhou, People's Republic of China
| | - Zezhou Xiao
- Department of Cardiovascular Surgery, Nanfang Hospital, Southern Medical University, No.1838 North Guangzhou Avenue, Baiyun District, Guangzhou, People's Republic of China
| | - Peng Zhu
- Department of Cardiovascular Surgery, Nanfang Hospital, Southern Medical University, No.1838 North Guangzhou Avenue, Baiyun District, Guangzhou, People's Republic of China
| | - Yufeng Zhu
- Laboratory Animal Research Center, Nanfang Hospital, Southern Medical University, No.1838 North Guangzhou Avenue, Baiyun District, Guangzhou, People's Republic of China.
| | - Jun Lu
- Department of Cardiovascular Surgery, Nanfang Hospital, Southern Medical University, No.1838 North Guangzhou Avenue, Baiyun District, Guangzhou, People's Republic of China.
| | - Shaoyi Zheng
- Department of Cardiovascular Surgery, Nanfang Hospital, Southern Medical University, No.1838 North Guangzhou Avenue, Baiyun District, Guangzhou, People's Republic of China.
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Bagali S, Das KK. Hypoxia and its preconditioning on cardiac and vascular remodelling in experimental animals. Respir Physiol Neurobiol 2021; 285:103588. [PMID: 33253893 DOI: 10.1016/j.resp.2020.103588] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 09/28/2020] [Accepted: 11/12/2020] [Indexed: 11/21/2022]
Abstract
Since oxygen (O2) is indispensable for mammalian life, every cell in the body is endowed with mechanisms to detect and to respond to changes in the O2 levels in the microenvironment. The heart and the brain are the two most vital, life-supporting organs requiring a continuous supply of O2 to sustain their high metabolic rate. On being challenged with hypoxia, maintenance of O2 supply to these organs even at the cost of others becomes a priority. This review describes the cardiovascular, skeletal muscle vascular, pulmonary vascular and cerebrovascular remodelling in face of chronic mild hypoxia exposure and the underlying mechanisms, with special reference to the role of oxidative stress, hypoxia signalling, autonomic nervous mechanisms. The significance of the normalized wall index (NWI) in assessing the remodelling of the vessels particularly of the intramyocardial coronary artery has been underscored. The review also highlights the basic concepts of hypoxic preconditioning and the subsequent protection of the brain against an acute ischemic insult in preclinical studies hinting towards its possible therapeutic potential in the management of ischemic stroke.
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Hertzog RG, Bicheru NS, Popescu DM, Călborean O, Catrina AM. Hypoxic preconditioning - A nonpharmacological approach in COVID-19 prevention. Int J Infect Dis 2020; 103:415-419. [PMID: 33249285 PMCID: PMC7690942 DOI: 10.1016/j.ijid.2020.11.181] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 11/17/2020] [Accepted: 11/21/2020] [Indexed: 12/19/2022] Open
Abstract
Hypoxia is defined by low oxygen concentration in organs, tissues, and cells. Maintaining oxygen homeostasis represents the essential cellular metabolic process for the structural integrity of tissues in different pathological conditions, including severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection. Considering the role of hypoxia-inducible factor-1 as the regulator of cellular response to hypoxia and its involvement in angiogenesis, erythropoiesis, glucose metabolism, inflammation, we propose hypoxic preconditioning (HPC) as a novel prevention therapeutic approach on healthy contacts of patients with coronavirus disease-2019 (COVID-19). To date, several studies revealed the beneficial effects of HPC in ischemia, kidney failure, and in pulmonary function recovery of patients who underwent lung surgery. HPC increases the expression of factors that promote cell survival and angiogenesis, induces an anti-inflammatory outcome, triggers coordinated hypoxia responses that promote erythropoiesis, and mobilizes the circulating progenitor cells. Furthermore, the mesenchymal stem cells (MSC) exposed to HPC show improvement of their regenerative capacities and increases the effectiveness of stem cell therapy in different pathologies, including COVID-19. In conclusion, HPC should be considered as an approach with beneficial outcomes and without significant side effects when the organism is severely exposed to the same stressor. HPC appears as a trigger to mechanisms that improve and maintain tissue oxygenation and repair, a main goal in different pathologies, including COVID-19 or other respiratory conditions.
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Zhang J, Zhang J, Li XJ, Xiao J, Ye F. Hypoxic Preconditioning Ameliorates Amyloid-β Pathology and Longterm Cognitive Decline in AβPP/PS1 Transgenic Mice. Curr Alzheimer Res 2020; 17:626-634. [PMID: 33030131 DOI: 10.2174/1567205017666201007121730] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 08/05/2020] [Accepted: 08/12/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND AND OBJECTIVE Hypoxic Preconditioning (HPC) has been well established to trigger endogenous mechanisms of neuroprotection basing on models of hypoxic and ischemic diseases in the Central Nervous System (CNS). However, its effects against Alzheimer's Disease (AD) still lack substantial evidence and in-depth exploration. The present study aimed to investigate the impacts of HPC on AD-related memory decline and amyloid-β (Aβ) pathology in AβPP/PS1 transgenic mice. METHODS Seven-week-old AβPP/PS1 transgenic mice were randomized into HPC and non-HPC groups. The HPC groups were treated with early and repetitive HPC for four weeks, while the non-HPC group was raised under normoxia condition. All the animals were then raised until the age of 28 weeks when Morris water maze tests were conducted to examine the animals' spatial memory. Indicators for Aβ pathology (soluble Aβ levels and numbers of Aβ plaques) and the expression of relevant proteins were measured to explore potential mechanisms. RESULTS The results showed that HPC ameliorated memory decline and Aβ pathology in AβPP/PS1 mice. The protein levels of Amyloid-β Precursor Protein (AβPP) and β-site APP Cleaving Enzyme 1 (BACE1) were reduced while that of Hypoxic inducible factor 1α (HIF-1α) was elevated in HPC groups. CONCLUSION HPC might be a promising strategy for AD intervention. Its potential protection might be realized via downregulating the expressions of AβPP and BACE1 and hence inhibiting Aβ pathology. Notably, HIF-1α might play a key role in mediating subsequent neuroadaptive changes following HPC.
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Affiliation(s)
- Jian Zhang
- Department of Public Health, Affiliated Hospital of Sichuan Nursing Vocational College, Chengdu,
China,Department of Operating Room, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital,
Chengdu, China
| | - Ji Zhang
- Department of Neurology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu,
China,Department of Neurology, Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital,
Chengdu, China,School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Xiao-Jia Li
- Department of Neurology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu,
China,Department of Neurology, Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital,
Chengdu, China
| | - Jun Xiao
- Department of Neurology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu,
China,Department of Neurology, Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital,
Chengdu, China
| | - Fang Ye
- Department of Neurology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu,
China,Department of Neurology, Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital,
Chengdu, China
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20
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Wang X, Shen K, Wang J, Liu K, Wu G, Li Y, Luo L, Zheng Z, Hu D. Hypoxic preconditioning combined with curcumin promotes cell survival and mitochondrial quality of bone marrow mesenchymal stem cells, and accelerates cutaneous wound healing via PGC-1α/SIRT3/HIF-1α signaling. Free Radic Biol Med 2020; 159:164-176. [PMID: 32745765 DOI: 10.1016/j.freeradbiomed.2020.07.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 07/10/2020] [Accepted: 07/11/2020] [Indexed: 12/11/2022]
Abstract
Restrained survival and function of relocated bone marrow mesenchymal stem cells (BMSCs) is a major impediment to BMSCs-mediated tissue repair. Accumulating evidences have indicated that hypoxic preconditioning of BMSCs could enhance BMSCs' adaptability after transplantation and thus improve their therapeutic properties. Curcumin, a natural dietary product, is known to exert profound protective effects on various cellular processes. Here we showed that mild hypoxic preconditioning combined with curcumin significantly increased cell survival, enriched more cells in G2/M and S phase, and improved mitochondrial function in BMSCs. Meanwhile, hypoxic preconditioning combined with curcumin altered mitochondrial cristae shape and strongly inhibited mitochondrial cytochrome c release, which consequently suppressed an apoptosis signal as revealed by reduced caspase-3 cleavage in BMSCs. Moreover, hypoxic preconditioning remarkably promoted mitochondrial quality via increasing mitochondrial fusion and elevating the activity of oxidative phosphorylation (OXPHOS) and mitochondrial complex Ⅰ enzyme in BMSCs, which were in accordance with the up-regulated expression of OPA1, PINK1 and Parkin. At the mechanistic level, the destabilization of HIF-1α and the up-regulated expression of PGC-1α and SIRT3 synergistically contributed to the protective effects of hypoxic preconditioning combined with curcumin in BMSCs. The proteasome inhibitor MG132 stabilized HIF-1a expression, but not PGC-1α or SIRT3, and dramatically restrained BMSCs survival under hypoxia combined with curcumin condition. MG132 also increased mitochondrial superoxide and intracellular hydrogen peroxide (H2O2) production and caspase-3 activation in hypoxia combined with curcumin-treated BMSCs. Furthermore, knockdown of SIRT3 and PGC-1α by RNAi both led to caspase-3 activation in BMSCs after hypoxia and curcumin treatment. Notably, SIRT3 RNAi suppressed OXPHOS activity, while PGC-1α RNAi triggered mitochondrial superoxide and intracellular H2O2 production in hypoxia combined with curcumin-treated BMSCs. Finally, we showed that hypoxia combined with curcumin-treated BMSCs accelerated the cutaneous wound healing process in a mice wound model. Overall, this study suggests that hypoxic preconditioning combined with curcumin could serve as an attractive strategy for facilitating BMSCs-mediated tissue repair, and further sheds new light on the rich repertoire of PGC-1α/SIRT3/HIF-1α signaling involved in the regulation of mitochondrial quality and function for cellular adaption to hypoxia.
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Affiliation(s)
- Xujie Wang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shannxi 710032, China
| | - Kuo Shen
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shannxi 710032, China
| | - Jing Wang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shannxi 710032, China
| | - Kaituo Liu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shannxi 710032, China
| | - Gaofeng Wu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shannxi 710032, China
| | - Yan Li
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shannxi 710032, China
| | - Liang Luo
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shannxi 710032, China
| | - Zhao Zheng
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shannxi 710032, China.
| | - Dahai Hu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shannxi 710032, China.
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21
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Zhang XR, Huang YZ, Gao HW, Jiang YL, Hu JG, Pi JK, Chen AJ, Zhang Y, Zhou L, Xie HQ. Hypoxic preconditioning of human urine-derived stem cell-laden small intestinal submucosa enhances wound healing potential. Stem Cell Res Ther 2020; 11:150. [PMID: 32252800 PMCID: PMC7137341 DOI: 10.1186/s13287-020-01662-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 02/27/2020] [Accepted: 03/23/2020] [Indexed: 02/08/2023] Open
Abstract
Background Urine-derived stem cells (USCs) are a valuable stem cell source for tissue engineering because they can be harvested non-invasively. Small intestine submucosa (SIS) has been used as scaffolds for soft tissue repair in the clinic. However, the feasibility and efficacy of a combination of USCs and SIS for skin wound healing has not been reported. In this study, we created a tissue-engineered skin graft, termed the SIS+USC composite, and hypothesized that hypoxic preconditioning would improve its wound healing potential. Methods USCs were seeded on SIS membranes to fabricate the SIS+USC composites, which were then cultured in normoxia (21% O2) or preconditioned in hypoxia (1% O2) for 24 h, respectively. The viability and morphology of USCs, the expression of genes related to wound angiogenesis and reepithelialization, and the secretion of growth factors were determined in vitro. The wound healing ability of the SIS+USC composites was evaluated in a mouse full-thickness skin wound model. Results USCs showed good cell viability and morphology in both normoxia and hypoxic preconditioning groups. In vitro, hypoxic preconditioning enhanced not only the expression of genes related to wound angiogenesis (VEGF and Ang-2) and reepithelialization (bFGF and EGF) but also the secretion of growth factors (VEGF, EGF, and bFGF). In vivo, hypoxic preconditioning significantly improved the wound healing potential of the SIS+USC composites. It enhanced wound angiogenesis at the early stage of wound healing, promoted reepithelialization, and improved the deposition and remodeling of collagen fibers at the late stage of wound healing. Conclusions Taken together, this study shows that hypoxic preconditioning provides an easy and efficient strategy to enhance the wound healing potential of the SIS+USC composite.
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Affiliation(s)
- Xiu-Ru Zhang
- Laboratory of Stem Cell and Tissue Engineering, Orthopaedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, No.1 Ke-Yuan-Si-Lu, Gao-Peng-Da-Dao, Chengdu, 610041, Sichuan, China.,Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, 610041, China.,Surgery of Spine and Spinal Cord, Henan Provincial People's Hospital, Zhengzhou, 450000, China
| | - Yi-Zhou Huang
- Laboratory of Stem Cell and Tissue Engineering, Orthopaedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, No.1 Ke-Yuan-Si-Lu, Gao-Peng-Da-Dao, Chengdu, 610041, Sichuan, China.,Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Hong-Wei Gao
- Laboratory of Stem Cell and Tissue Engineering, Orthopaedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, No.1 Ke-Yuan-Si-Lu, Gao-Peng-Da-Dao, Chengdu, 610041, Sichuan, China
| | - Yan-Lin Jiang
- Laboratory of Stem Cell and Tissue Engineering, Orthopaedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, No.1 Ke-Yuan-Si-Lu, Gao-Peng-Da-Dao, Chengdu, 610041, Sichuan, China
| | - Jun-Gen Hu
- Laboratory of Stem Cell and Tissue Engineering, Orthopaedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, No.1 Ke-Yuan-Si-Lu, Gao-Peng-Da-Dao, Chengdu, 610041, Sichuan, China
| | - Jin-Kui Pi
- Laboratory of Stem Cell and Tissue Engineering, Orthopaedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, No.1 Ke-Yuan-Si-Lu, Gao-Peng-Da-Dao, Chengdu, 610041, Sichuan, China
| | - An-Jing Chen
- Laboratory of Stem Cell and Tissue Engineering, Orthopaedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, No.1 Ke-Yuan-Si-Lu, Gao-Peng-Da-Dao, Chengdu, 610041, Sichuan, China
| | - Yi Zhang
- Laboratory of Stem Cell and Tissue Engineering, Orthopaedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, No.1 Ke-Yuan-Si-Lu, Gao-Peng-Da-Dao, Chengdu, 610041, Sichuan, China
| | - Li Zhou
- Laboratory of Stem Cell and Tissue Engineering, Orthopaedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, No.1 Ke-Yuan-Si-Lu, Gao-Peng-Da-Dao, Chengdu, 610041, Sichuan, China
| | - Hui-Qi Xie
- Laboratory of Stem Cell and Tissue Engineering, Orthopaedic Research Institute, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center of Biotherapy, No.1 Ke-Yuan-Si-Lu, Gao-Peng-Da-Dao, Chengdu, 610041, Sichuan, China.
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Wu X, Wang C, Wang J, Zhu M, Yao Y, Liu J. Hypoxia preconditioning protects neuronal cells against traumatic brain injury through stimulation of glucose transport mediated by HIF-1α/GLUTs signaling pathway in rat. Neurosurg Rev 2020; 44:411-422. [PMID: 31897883 PMCID: PMC7851104 DOI: 10.1007/s10143-019-01228-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 12/04/2019] [Accepted: 12/18/2019] [Indexed: 11/25/2022]
Abstract
Hypoxia preconditioning (HPC), a well-established preconditioning model, has been shown to protect the brain against severe hypoxia or ischemia caused by traumatic brain injury (TBI), but the mechanism has not been well elucidated. Anaerobic glycolysis is the major way for neurons to produce energy under cerebral ischemia and hypoxia after TBI, and it requires large amounts of glucose. We hypothesized that glucose transport, as a rate-limiting step of glucose metabolism, may play key roles in the neuroprotective effects of HPC on cerebral cortex tissue against TBI. The aim of this study was to investigate the effect of HPC on glucose transport activity of rat cerebral cortex tissue after TBI through examining the gene expression of two major glucose transporters (GLUT1 and GLUT3) and their upstream target gene hypoxia-inducible factor-1α (HIF-1α). Sprague-Dawley rats were treated with HPC (50.47 kPa, 3 h/d, 3d). Twenty-four hours after the last treatment, the rats were injured using the Feeney free falling model. Cortex tissues of injured rats were removed at 1 h, 4 h, 8 h, 12 h, 1 day, 3 days, 7 d, and 14 days post-injury for histological analysis. Compared with TBI alone, HPC before TBI resulted in the expression of HIF-1α, GLUT1, and GLUT3 to increase at 1 h; they were markedly increased at 4 h, 8 h, 12 h, 1 day, and 3 days and decreased thereafter (p < 0.05). HPC before TBI could improve neuronal survival in rats by examining NeuN staining and observing reduced apoptosis by examining TUNEL staining. The result showed that HPC before TBI could increase the expression of GLUT1 and GLUT3. And through double immunofluorescence staining for GLUT3 and NeuN, the results strongly suggest that HPC improved glucose transport activity of neurons in rats with TBI. In summary, our results further support that HPC can improve hypoxia tolerance and attenuate neuronal loss of cerebral cortex in rats after TBI. The mechanism is mainly related to the increase of glucose transport activity through inducing GLUT1 and GLUT3 expression through upregulating HIF-1α expression.
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Affiliation(s)
- Xiaogang Wu
- Department of Neurosurgery, No. 901 Hospital of the Chinese People's Liberation Army Logistic Support Force, Hefei, Anhui, China
| | - Chunlin Wang
- Department of Neurosurgery, No. 901 Hospital of the Chinese People's Liberation Army Logistic Support Force, Hefei, Anhui, China
| | - Jinbiao Wang
- Department of Neurosurgery, No. 901 Hospital of the Chinese People's Liberation Army Logistic Support Force, Hefei, Anhui, China
| | - Meijie Zhu
- Department of Neurosurgery, No. 901 Hospital of the Chinese People's Liberation Army Logistic Support Force, Hefei, Anhui, China
| | - Yinsheng Yao
- Department of Neurosurgery, No. 901 Hospital of the Chinese People's Liberation Army Logistic Support Force, Hefei, Anhui, China
| | - Jiachuan Liu
- Department of Neurosurgery, No. 901 Hospital of the Chinese People's Liberation Army Logistic Support Force, Hefei, Anhui, China.
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23
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Zhang W, Chen M, Li H, Yuan J, Li J, Wu F, Zhang Y. Hypoxia preconditioning attenuates lung injury after thoracoscopic lobectomy in patients with lung cancer: a prospective randomized controlled trial. BMC Anesthesiol 2019; 19:209. [PMID: 31711422 PMCID: PMC6849275 DOI: 10.1186/s12871-019-0854-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 09/20/2019] [Indexed: 12/31/2022] Open
Abstract
Background Hypoxic preconditioning (HPC) may protect multiple organs from various injuries. We hypothesized that HPC would reduce lung injury in patients undergoing thoracoscopic lobectomy. Methods In a prospective randomized controlled trial, 70 patients undergoing elective thoracoscopic lobectomy were randomly allocated to the HPC group or the control group. Three cycles of 5-min hypoxia and 3-min ventilation applied to the nondependent lung served as the HPC intervention. The primary outcome was the PaO2/FiO2 ratio. Secondary outcomes included postoperative pulmonary complications, pulmonary function, and duration of hospital stay. Results HPC significantly increased the PaO2/FiO2 ratio compared with the control at 30 min after one-lung ventilation and 7 days after operation. Compared with the control, it also significantly improved postoperative pulmonary function and markedly reduced the postoperative hospital stay duration. No significant differences between groups were observed in the incidence of pulmonary complications or overall postoperative morbidity. Conclusions HPC improves postoperative oxygenation, enhances the recovery of pulmonary function, and reduces the duration of hospital stay in patients undergoing thoracoscopic lobectomy. Trial registration This study was registered in the Chinese Clinical Trial Registry (ChiCTR-IPR-17011249) on April 27, 2017.
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Affiliation(s)
- Wenjing Zhang
- Department of Anesthesiology, Zhoushan Hospital, No.739 Dingshen Street, Zhoushan, Zhejiang, China
| | - Mo Chen
- Department of Anesthesiology, Suzhou Municipal Hospital (North District), Nanjing Medical University Affiliated Suzhou Hospital, No.242 Guangji Road, Suzhou, Jiangsu, China
| | - Hongbin Li
- Department of Anesthesiology, Zhoushan Hospital, No.739 Dingshen Street, Zhoushan, Zhejiang, China
| | - Jia Yuan
- Department of Anesthesiology, Zhoushan Hospital, No.739 Dingshen Street, Zhoushan, Zhejiang, China
| | - Jingjing Li
- Department of Anesthesiology, Zhoushan Hospital, No.739 Dingshen Street, Zhoushan, Zhejiang, China
| | - Feixiang Wu
- Department of Anesthesiology, Shanghai Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, No.225 Changhai Road, Shanghai, China.
| | - Yan Zhang
- Department of Anesthesiology, Zhoushan Hospital, No.739 Dingshen Street, Zhoushan, Zhejiang, China.
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Güney Ş, Dinçer S, Göktaş G, Take-Kaplanoğlu G. Neuroprotective role of delta opioid receptors in hypoxic preconditioning. Turk J Med Sci 2019; 49:1568-1576. [PMID: 31652039 PMCID: PMC7018290 DOI: 10.3906/sag-1810-51] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 08/04/2019] [Indexed: 12/15/2022] Open
Abstract
Background/aim The purpose of the present study was to explore the neuroprotective role of delta opioid receptors (DOR) in the rat cortex in hypoxic preconditioning. Materials and methods Rats were randomly divided into 8 groups: control (C), sham (S), hypoxic preconditioning (PC), severe hypoxia (SH), PC + SH, PC + SH + Saline (PS), PC + SH + DPDPE (DPDPE, selective DOR agonist), PC + SH + NT (NT, Naltrindole, selective DOR antagonist). Drugs were administered intracerebroventrically. Twenty four h after the end of 3 consecutive days of PC (10% O2, 2 h/day), the rats were subjected to severe hypoxia (7% O2 for 3 h). Bcl-2 and cyt-c were measured by western blot, and caspase-3 was observed immunohistochemically. Results Bcl-2 expressions in the PC group were higher than in control, SH, and PC + SH groups. Even though there were no significant differences between the groups in terms of cyt-c levels, caspase-3 immunoreactivity of cortical neurons and glial cells in the severe hypoxia and NT groups were higher than in the control, sham, and hypoxic preconditioning groups. DPDPE administration diminished caspase-3 immunoreactivity compared with all of the severe hypoxia groups. Conclusions These results suggest that cortical cells are resistant to apoptosis via increased expression of Bcl-2 and decreased immunoreactivity of caspase-3 in the cortex, and that DOR is involved in neuroprotection induced by hypoxic preconditioning via the caspase-3 pathway in cortical neurons.
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Affiliation(s)
- Şevin Güney
- Department of Physiology, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Sibel Dinçer
- Department of Physiology, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Güleser Göktaş
- Department of Histology and Embryology, Faculty of Medicine, Lokman Hekim University, Ankara, Turkey
| | - Gülnur Take-Kaplanoğlu
- Department of Histology and Embryology, Faculty of Medicine, Gazi University, Ankara, Turkey
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25
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Xiao F, Lv J, Liang YB, Chen YH, Tu YB, Guan RC, Li L, Xie YB. The expression of glucose transporters and mitochondrial division and fusion proteins in rats exposed to hypoxic preconditioning to attenuate propofol neurotoxicity. Int J Neurosci 2019; 130:161-169. [PMID: 31516040 DOI: 10.1080/00207454.2019.1667784] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Purpose: Evidence has shown that propofol may cause widespread apoptotic neurodegeneration. Hypoxic preconditioning has been demonstrated to provide neuroprotection and brain recovery from both acute and chronic neurodegeneration in several cellular and animal models. However, the mechanism has not been well elucidated. Therefore, the present study was designed to investigate the expression of glucose transporters (GLUT1 and GLUT3) and mitochondrial division and fusion (Drp1 and Mfn2) proteins in rats exposed to hypoxic preconditioning to attenuate propofol neurotoxicity.Methods: Propofol (100 mg/kg) was given to 7-day-old Sprague-Dawley rats; in some rats, hypoxic preconditioning was administered before intraperitoneal propofol injection by subjecting rats to five cycles of 10 min of hypoxia (8% O2) and 10 min of normoxia (21% O2). Then, the rats were allowed to breathe room air for 2 h. Neuronal mitochondrial morphology was observed by transmission electron microscopy. ATP content was detected using an ATP assay kit. The expression levels of GLUT1, GLUT3, pDrp1, Drp1 and Mfn2 were detected by Western blot, and the expression levels of GLUT1 and GLUT3 were further examined by immunohistochemistry.Results: Propofol damaged mitochondria, and decreased ATP content and GLUT3 and pDrp1 protein expression. However, our results suggested that hypoxic preconditioning could attenuate propofol neurotoxicity by reducing mitochondrial damage and increasing ATP content and pDrp1, GLUT1 and GLUT3 protein expression.Conclusion: Hypoxic preconditioning reduced propofol-induced damage in the hippocampus of neonatal rats by attenuating the increase in mitochondrial division and decrease in GLUT3 expression.
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Affiliation(s)
- Fei Xiao
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Jing Lv
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Yu Bing Liang
- Department of Anesthesiology, The Affiliated Tumor Hospital of Guangxi Medical University, Nanning, China
| | - Yan Hua Chen
- Department of Anesthesiology, Cardiovascular Institute, Nanning, China
| | - You Bing Tu
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Rui Cong Guan
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Li Li
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Yu Bo Xie
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
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Huang L, Wu S, Li H, Dang Z, Wu Y. Hypoxic preconditioning relieved ischemic cerebral injury by promoting immunomodulation and microglia polarization after middle cerebral artery occlusion in rats. Brain Res 2019; 1723:146388. [PMID: 31421131 DOI: 10.1016/j.brainres.2019.146388] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 08/12/2019] [Accepted: 08/13/2019] [Indexed: 12/30/2022]
Abstract
OBJECTIVES This study was designed to investigate whether immunomodulation and Microglia polarization is involved in the anti-inflammatory and neuroprotective effect induced by hypoxic preconditioning (HPC) in the middle cerebral artery occlusion (MCAO) brain injury model. METHODS Longa method, (neurological disability status scale) NDSS method and TTC staining were used to evaluate the degree of cerebral infarction injury under different treatments (Sham, HPC, MCAO and co-treatment with HPC and MCAO). Western blot was used to detect expression profiles of apoptosis and related factors of neurological function. Flow cytometry was performed to analyze changes in the ratio of helper T cells, toxic T cells and NK cells in peripheral immune cells. And immunohistochemistry was used to examine the changes in microglial morphology. ELISA was used to evaluate the levels of nerve growth factors and neurogenesis conditions. Finally, RT-PCR was determined to analyze the transformation of microglia phenotype after HPC and MCAO treatment. RESULTS MCAO dramatically induced local formation of cerebral infarction. HPC relieved MCAO-induced cerebral infarction and increased rat cognition. HPC affected activation of microglia without significantly affecting in peripheral immune cell populations. After HPC co-treatment with MCAO, the M1 phenotype of microglia was changed and there was a transformation to M2. CONCLUSION The treatment of HPC remarkably affected the polarization of microglia cells in MCAO rats, and reduced the cerebral nerve injury and played a protective role in MCAO model.
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Affiliation(s)
- Lu Huang
- Research Center for High Altitude Medicine, Qinghai University, Xining, China; Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province (Qinghai-Utah Loint Research Key Lab for High Altitude Medicine), Xining, China; Qinghai Provincial People's Hospital, Xining, China
| | - Shizheng Wu
- Qinghai Provincial People's Hospital, Xining, China.
| | - Hao Li
- Qinghai Provincial People's Hospital, Xining, China
| | - Zhancui Dang
- Qinghai University Medical College, Xining, China
| | - Yue Wu
- Qinghai University, Qinghai, China
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Kang IN, Lee CY, Tan SC. Selection of best reference genes for qRT-PCR analysis of human neural stem cells preconditioned with hypoxia or baicalein-enriched fraction extracted from Oroxylum indicum medicinal plant. Heliyon 2019; 5:e02156. [PMID: 31388587 PMCID: PMC6676056 DOI: 10.1016/j.heliyon.2019.e02156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 06/11/2019] [Accepted: 07/23/2019] [Indexed: 12/29/2022] Open
Abstract
Whilst the potential of neural stem cell (NSC)-based treatment is recognized worldwide and seems to offer a promising therapeutic option for stroke treatments, there is currently no full understanding regarding the effects of hypoxic and baicalein-enriched fraction (BEF) preconditioning approaches on the therapeutic potential of these cells for stroke. The potential of preconditioned NSC can be determined based on the expression of several key neuroprotective genes using qRT-PCR technique. However, prior to that, it is imperative and extremely important to carefully select reference gene(s) for accurate qRT-PCR data normalization to avoid error in data interpretation. This study aimed to evaluate the stability of ten candidate reference genes via comprehensive analysis using three algorithms software: geNorm, NormFinder and BestKeeper. Our results revealed that HPRT1 and RPL13A were the most reliable reference genes for BEF-preconditioned NSCs, but ironically, HPRT1 was ranked as the least stable reference gene for hypoxic-preconditioned NSCs. On the other hand, RPLP1 and RPL13A were selected as the most stably expressed pair of reference genes for hypoxic-preconditioned NSCs. In conclusion, this study has pointed out the importance of identifying valid reference genes and has presented the first significant validation on best reference genes recommended for qRT-PCR study involves NSC preconditioned with hypoxia or with BEF extracted from Oroxylum indicum medicinal plant.
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Affiliation(s)
- In Nee Kang
- School of Health Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
| | - Chong Yew Lee
- School of Pharmaceutical Sciences, Main Campus, Universiti Sains Malaysia, Penang, Malaysia
| | - Suat Cheng Tan
- School of Health Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian, Kelantan, Malaysia
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Ou K, Mertsch S, Theodoropoulou S, Wu J, Liu J, Copland DA, Scott LM, Dick AD, Schrader S, Liu L. Müller Cells Stabilize Microvasculature through Hypoxic Preconditioning. Cell Physiol Biochem 2019; 52:668-680. [PMID: 30921506 DOI: 10.33594/000000047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 03/25/2019] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND/AIMS Hypoxia of the retina is a common pathogenic drive leading to vision loss as a result of tissue ischemia, increased vascular permeability and ultimately retinal neovascularisation. Here we tested the hypothesis that Müller cells stabilize the neurovascular unit, microvasculature by suppression of HIF-1α activation as a result of hypoxic preconditioning. METHODS Tube Formation Assay and In vitro Vascular Permeability Image Assay were used to analyze angiogenesis and vascular integrity. Seahorse XF Cell Mito Stress Test was used to measure mitochondrial respiration. Gene and protein expression were examined by qRTPCR, ELISA and western blot. RESULTS Hypoxic insult induces a significant induction of proangiogenic factors including vascular endothelial growth factor (VEGF) and angiopoietinlike 4 (ANGPTL-4) resulting in angiogenesis and increased vascular permeability of vascular endothelial cells. Hypoxic preconditioning of a human retinal Müller glia cell line significantly attenuates HIF-1α activation through the inhibition of mTOR and concomitant induction of aerobic glycolysis, stabilizing endothelial cells. CONCLUSION Hypoxic preconditioning of Müller cells confers a robust protection to endothelial cells, through the suppression of HIF1α activation and its downstream regulation of VEGF and ANGPTL-4.
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Affiliation(s)
- Kepeng Ou
- Laboratory for Experimental Ophthalmology, University of Düsseldorf, Düsseldorf, Germany.,Academic Unit of Ophthalmology, Bristol Medical School, University of Bristol, Bristol, UK
| | - Sonja Mertsch
- Laboratory for Experimental Ophthalmology, University of Düsseldorf, Düsseldorf, Germany
| | - Sofia Theodoropoulou
- Academic Unit of Ophthalmology, Bristol Medical School, University of Bristol, Bristol, UK
| | - Jiahui Wu
- Academic Unit of Ophthalmology, Bristol Medical School, University of Bristol, Bristol, UK
| | - Jian Liu
- Academic Unit of Ophthalmology, Bristol Medical School, University of Bristol, Bristol, UK
| | - David A Copland
- Academic Unit of Ophthalmology, Bristol Medical School, University of Bristol, Bristol, UK
| | - Louis M Scott
- Academic Unit of Ophthalmology, Bristol Medical School, University of Bristol, Bristol, UK
| | - Andrew D Dick
- Academic Unit of Ophthalmology, Bristol Medical School, University of Bristol, Bristol, UK.,National Institute for Health Research (NIHR) Biomedical Research Centre at Moorfields Eye Hospital and University College London Institute of Ophthalmology, London, UK,
| | - Stefan Schrader
- Laboratory for Experimental Ophthalmology, University of Düsseldorf, Düsseldorf, Germany.,Department of Ophthalmology, University of Düsseldorf, Düsseldorf, Germany,
| | - Lei Liu
- Academic Unit of Ophthalmology, Bristol Medical School, University of Bristol, Bristol, UK,
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Kim YH, Lee KS, Kim YS, Kim YH, Kim JH. Effects of hypoxic preconditioning on memory evaluated using the T-maze behavior test. Anim Cells Syst (Seoul) 2019; 23:10-17. [PMID: 30834154 PMCID: PMC6394327 DOI: 10.1080/19768354.2018.1557743] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 10/03/2018] [Accepted: 11/15/2018] [Indexed: 11/28/2022] Open
Abstract
Perioperative brain ischemia and stroke are leading causes of morbidity and mortality. Brief hypoxic preconditioning is known to have protective effects against hypoxic-ischemic insult in the brain. Current studies on the neuroprotective effects of ischemic preconditioning are based on histologic findings and biomarker changes. However, studies regarding effects on memory are rare. To precondition zebrafish to hypoxia, they were exposed to a dissolved oxygen (DO) concentration of 1.0 ± 0.5 mg/L in water for 30 s. The hypoxic zebrafish were then exposed to 1.0 ± 0.5 mg/L DO until the third stage of hypoxia, for 10 min ± 30 s. Zebrafish were assessed for memory retention after the hypoxic event. Learning and memory were tested using the T-maze, which evaluates memory based on whether or not zebrafish moves to the correct target compartment. In the hypoxic preconditioning group, infarct size was reduced compared with the hypoxic-only treated zebrafish group; memory was maintained to a degree similar to that in the hypoxia-untreated group. The hypoxic-only group showed significant memory impairments. In this study, we used a hypoxic zebrafish model and assessed the effects of ischemic preconditioning not only on histological damages but also on brain function, especially memory. This study demonstrated that a brief hypoxic event has protective effects in hypoxic brain damage and helped maintain memory in zebrafish. In addition, our findings suggest that the zebrafish model is useful in rapidly assessing the effects of ischemic preconditioning on memory.
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Affiliation(s)
- Yun-Hee Kim
- Department of Anesthesiology and Pain Medicine, Korea University Ansan Hospital, Ansan, Korea
| | - Kuen-Su Lee
- Department of Anesthesiology and Pain Medicine, Korea University Ansan Hospital, Ansan, Korea
| | - Young-Sung Kim
- Department of Anesthesiology and Pain Medicine, Korea University Guro Hospital, Seoul, Korea
| | - Yeon-Hwa Kim
- Institute of Medical Science, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea
| | - Jae-Hwan Kim
- Department of Anesthesiology and Pain Medicine, Korea University Ansan Hospital, Ansan, Korea
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Meng SS, Xu XP, Chang W, Lu ZH, Huang LL, Xu JY, Liu L, Qiu HB, Yang Y, Guo FM. LincRNA-p21 promotes mesenchymal stem cell migration capacity and survival through hypoxic preconditioning. Stem Cell Res Ther 2018; 9:280. [PMID: 30359325 PMCID: PMC6202870 DOI: 10.1186/s13287-018-1031-x] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 08/22/2018] [Accepted: 09/30/2018] [Indexed: 12/19/2022] Open
Abstract
Background Mesenchymal stem cells (MSCs) derived from bone marrow have potent stabilizing effects for the treatment of acute respiratory distress syndrome (ARDS). However, low efficiency and survival in MSC homing to injured lung tissue remains to be solved. Therefore, the aim of this study was to assess whether large intergenic noncoding RNA (LincRNA)-p21 promote MSC migration and survival capacity through hypoxic preconditioning in vitro. Methods MSCs were cultured and divided into the normoxia culture group (20% O2) and hypoxia culture group (1% O2). To determine roles and mechanisms, lentivirus vector-mediated LincRNA-p21 knockdown of MSCs and hypoxia-inducible factor (HIF-1α) inhibitor KC7F2 were introduced. Additionally, MSC migration was analyzed by scratch test and transwell migration assays. MSC proliferation was tested by cell counting kit-8 and trypan blue dye. Apoptosis was detected by Annexin V-PE/7-AAD stained flow cytometry. Moreover, LincRNA-p21 and HIF-1α mRNA was measured by reverse transcription-polymerase chain reaction, and HIF-1α and CXCR4/7 protein were assayed by western blot (WB) or enzyme-linked immunosorbent assay (ELISA). Apoptosis protein caspase-3 and cleaved-caspase-3 were investigated by WB analysis. Considering interactions between VHL and HIF-1α under LincRNA-p21 effect, co-immunoprecipitation was detected. Results Hypoxic preconditioning MSC promoted migration capacity and MSC survival than normoxia culture group. MSCs induced by hypoxic preconditioning evoked an increase in expression of LincRNA-p21, HIF-1α, and CXCR4/7(both were chemokine stromal-derived factor-1(SDF-1) receptors). Contrarily, blockade of LincRNA-p21 by shRNA and HIF-1α inhibitor KC7F2 abrogated upregulation of hypoxic preconditioning induced CXCR4/7 in MSCs, cell migration, and survival. Furthermore, co-immunoprecipitation assay revealed that hypoxic preconditioning isolated VHL and HIF-1α protein by increasing HIF-1α expression. Conclusions Hypoxic preconditioning was identified as a promoting factor of MSC migration and survival capacity. LincRNA-p21 promotes MSC migration and survival capacity through HIF-1α/CXCR4 and CXCR7 pathway under hypoxic preconditioning in vitro.
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Affiliation(s)
- Shan-Shan Meng
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, China
| | - Xiu-Ping Xu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, China
| | - Wei Chang
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, China
| | - Zhong-Hua Lu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, China
| | - Li-Li Huang
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, China
| | - Jing-Yuan Xu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, China
| | - Ling Liu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, China
| | - Hai-Bo Qiu
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, China
| | - Yi Yang
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, China
| | - Feng-Mei Guo
- Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, No.87, Dingjiaqiao Road, Gulou District, Nanjing, 210009, China.
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Lu N, Li X, Tan R, An J, Cai Z, Hu X, Wang F, Wang H, Lu C, Lu H. HIF-1α/Beclin1-Mediated Autophagy Is Involved in Neuroprotection Induced by Hypoxic Preconditioning. J Mol Neurosci 2018; 66:238-250. [PMID: 30203298 PMCID: PMC6182618 DOI: 10.1007/s12031-018-1162-7] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 08/20/2018] [Indexed: 02/07/2023]
Abstract
Hypoxic preconditioning (HPC) exerts a protective effect against hypoxic/ischemic brain injury, and one mechanism explaining this effect may involve the upregulation of hypoxia-inducible factor-1 (HIF-1). Autophagy, an endogenous protective mechanism against hypoxic/ischemic injury, is correlated with the activation of the HIF-1α/Beclin1 signaling pathway. Based on previous studies, we hypothesize that the protective role of HPC may involve autophagy occurring via activation of the HIF-1α/Beclin1 signaling pathway. To test this hypothesis, we evaluated the effects of HPC on oxygen-glucose deprivation/reperfusion (OGD/R)-induced apoptosis and autophagy in SH-SY5Y cells. HPC significantly attenuated OGD/R-induced apoptosis, and this effect was suppressed by the autophagy inhibitor 3-methyladenine and mimicked by the autophagy agonist rapamycin. In control SH-SY5Y cells, HPC upregulated the expression of HIF-1α and downstream molecules such as BNIP3 and Beclin1. Additionally, HPC increased the LC3-II/LC3-I ratio and decreased p62 levels. The increase in the LC3-II/LC3-I ratio was inhibited by the HIF-1α inhibitor YC-1 or by Beclin1-short hairpin RNA (shRNA). In OGD/R-treated SH-SY5Y cells, HPC also upregulated the expression levels of HIF-1α, BNIP3, and Beclin1, as well as the LC3-II/LC3-I ratio. Furthermore, YC-1 or Beclin1-shRNA attenuated the HPC-mediated cell viability in OGD/R-treated cells. Taken together, our results demonstrate that HPC protects SH-SY5Y cells against OGD/R via HIF-1α/Beclin1-regulated autophagy.
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Affiliation(s)
- Na Lu
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
- Key Laboratory for the Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, 453003, Henan, People's Republic of China
| | - Xingxing Li
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Ruolan Tan
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Jing An
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Zhenlu Cai
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Xiaoxuan Hu
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Feidi Wang
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Haoruo Wang
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
| | - Chengbiao Lu
- Key Laboratory for the Brain Research of Henan Province, Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, 453003, Henan, People's Republic of China
| | - Haixia Lu
- Institute of Neurobiology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China.
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Chau MJ, Deveau TC, Gu X, Kim YS, Xu Y, Yu SP, Wei L. Delayed and repeated intranasal delivery of bone marrow stromal cells increases regeneration and functional recovery after ischemic stroke in mice. BMC Neurosci 2018; 19:20. [PMID: 29649974 PMCID: PMC5897929 DOI: 10.1186/s12868-018-0418-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Accepted: 03/24/2018] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Stroke is a leading cause of death and disability worldwide, yet there are limited treatments available. Intranasal administration is a novel non-invasive strategy to deliver cell therapy into the brain. Cells delivered via the intranasal route can migrate from the nasal mucosa to the ischemic infarct and show acute neuroprotection as well as functional benefits. However, there is little information about the regenerative effects of this transplantation method in the delayed phase of stroke. We hypothesized that repeated intranasal deliveries of bone marrow stromal cells (BMSCs) would be feasible and could enhance delayed neurovascular repair and functional recovery after ischemic stroke. RESULTS Reverse transcription polymerase chain reaction and immunocytochemistry were performed to analyze the expression of regenerative factors including SDF-1α, CXCR4, VEGF and FAK in BMSCs. Ischemic stroke targeting the somatosensory cortex was induced in adult C57BL/6 mice by permanently occluding the right middle cerebral artery and temporarily occluding both common carotid arteries. Hypoxic preconditioned (HP) BMSCs (HP-BMSCs) with increased expression of surviving factors HIF-1α and Bcl-xl (1 × 106 cells/100 μl per mouse) or cell media were administered intranasally at 3, 4, 5, and 6 days after stroke. Mice received daily BrdU (50 mg/kg) injections until sacrifice. BMSCs were prelabeled with Hoechst 33342 and detected within the peri-infarct area 6 and 24 h after transplantation. In immunohistochemical staining, significant increases in NeuN/BrdU and Glut-1/BrdU double positive cells were seen in stroke mice received HP-BMSCs compared to those received regular BMSCs. HP-BMSC transplantation significantly increased local cerebral blood flow and improved performance in the adhesive removal test. CONCLUSIONS This study suggests that delayed and repeated intranasal deliveries of HP-treated BMSCs is an effective treatment to encourage regeneration after stroke.
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Affiliation(s)
- Monica J. Chau
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322 USA
| | - Todd C. Deveau
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322 USA
| | - Xiaohuan Gu
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322 USA
| | - Yo Sup Kim
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322 USA
| | - Yun Xu
- Department of Neurology, Nanjing University School of Medicine, Nanjing, China
| | - Shan Ping Yu
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322 USA
- Center for Visual and Neurocognitive Rehabilitation, Veteran’s Affair Medical Center, Atlanta, GA USA
| | - Ling Wei
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322 USA
- Department of Neurology, Emory University School of Medicine, Atlanta, GA 30322 USA
- Woodruff Memorial Research Building, Suite 617, Emory University School of Medicine, 101 Woodruff Circle, Atlanta, GA 30322 USA
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Liu Y, Yang X, Maureira P, Falanga A, Marie V, Gauchotte G, Poussier S, Groubatch F, Marie PY, Tran N. Permanently Hypoxic Cell Culture Yields Rat Bone Marrow Mesenchymal Cells with Higher Therapeutic Potential in the Treatment of Chronic Myocardial Infarction. Cell Physiol Biochem 2017; 44:1064-1077. [PMID: 29179177 DOI: 10.1159/000485406] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 08/22/2017] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The mismatch between traditional in vitro cell culture conditions and targeted chronic hypoxic myocardial tissue could potentially hamper the therapeutic effects of implanted bone marrow mesenchymal stem cells (BMSCs). This study sought to address (i) the extent of change to BMSC biological characteristics in different in vitro culture conditions and (ii) the effectiveness of permanent hypoxic culture for cell therapy in treating chronic myocardial infarction (MI) in rats. METHODS rat BMSCs were harvested and cultured in normoxic (21% O2, n=27) or hypoxic conditions (5% O2, n=27) until Passage 4 (P4). Cell growth tests, flow cytometry, and Bio-Plex assays were conducted to explore variations in the cell proliferation, phenotype, and cytokine expression, respectively. In the in vivo set-up, P3-BMSCs cultured in normoxia (n=6) or hypoxia (n=6) were intramyocardially injected into rat hearts that had previously experienced 1-month-old MI. The impact of cell therapy on cardiac segmental viability and hemodynamic performance was assessed 1 month later by 2-Deoxy-2[18F]fluoro-D-glucose (18F-FDG) positron emission tomography (PET) imaging and pressure-volume catheter, respectively. Additional histomorphological examinations were conducted to evaluate inflammation, fibrosis, and neovascularization. RESULTS Hypoxic preconditioning significantly enhanced rat BMSC clonogenic potential and proliferation without altering the multipotency. Different profiles of inflammatory, fibrotic, and angiogenic cytokine secretion were also documented, with a marked correlation observed between in vitro and in vivo proangiogenic cytokine expression and tissue neovessels. Hypoxic-preconditioned cells presented a beneficial effect on the myocardial viability of infarct segments and intrinsic contractility. CONCLUSION Hypoxic-preconditioned BMSCs were able to benefit myocardial perfusion and contractility, probably by modulating the inflammation and promoting angiogenesis.
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Affiliation(s)
- Yihua Liu
- School of Surgery, INSERM U1116, Faculty of Medicine, University of Lorraine, Nancy, France.,Department of cardiovascular surgery, Union Hospital, Tongji Medical College, Huazhong University of science and technology, Wuhan, China.,Department of Cardiovascular Surgery, Nancy University Hospital, Nancy, France
| | - Xiaoxi Yang
- Department of Radiation and Medical Oncology, Zhongnan Hospital, Wuhan University, Wuhan, China
| | - Pablo Maureira
- School of Surgery, INSERM U1116, Faculty of Medicine, University of Lorraine, Nancy, France.,Department of Cardiovascular Surgery, Nancy University Hospital, Nancy, France
| | - Aude Falanga
- School of Surgery, INSERM U1116, Faculty of Medicine, University of Lorraine, Nancy, France
| | - Vanessa Marie
- School of Surgery, INSERM U1116, Faculty of Medicine, University of Lorraine, Nancy, France
| | | | - Sylvain Poussier
- Department of Nuclear Medicine, Nancy University Hospital, Nancy, France
| | - Frederique Groubatch
- School of Surgery, INSERM U1116, Faculty of Medicine, University of Lorraine, Nancy, France
| | - Pierre-Yves Marie
- School of Surgery, INSERM U1116, Faculty of Medicine, University of Lorraine, Nancy, France.,Department of Nuclear Medicine, Nancy University Hospital, Nancy, France
| | - Nguyen Tran
- School of Surgery, INSERM U1116, Faculty of Medicine, University of Lorraine, Nancy, France
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Chi OZ, Mellender SJ, Barsoum S, Liu X, Weiss HR. Hypoxic Preconditioning Increases Blood-Brain Barrier Disruption in the Early Stages of Cerebral Ischemia. Curr Neurovasc Res 2017; 14:26-31. [PMID: 27823555 DOI: 10.2174/1567202614666161104114821] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 10/12/2016] [Accepted: 10/13/2016] [Indexed: 11/22/2022]
Abstract
Even though hypoxic preconditioning has been reported to produce neuroprotection, its effect on blood-brain barrier (BBB) disruption in the early stages of cerebral ischemia within the therapeutic window is not clear. Since hypoxic preconditioning increases expression of vascular endothelial growth factor (VEGF) that modulates vascular permeability, the effects of hypoxic preconditioning and VEGF on BBB permeability were investigated after one hour of focal cerebral ischemia. Rats were exposed to 8% of oxygen for two hours or room air and then 24 hours later, permanent middle cerebral artery (MCA) occlusion was performed. In some of the hypoxic preconditioned rats, a VEGF-A antibody was applied to the ischemic cortex one hour before MCA occlusion. One hour after MCA occlusion, the transfer coefficient (Ki) of 14C-α-aminoisobutyric acid was determined to measure the degree of BBB disruption. MCA occlusion increased the Ki when compared with the contralateral cortex (14.1 ± 4.0 vs 4.2 ± 1.9 μL/g/min, p < 0.0001). Hypoxic preconditioning further increased the Ki in the ischemic cortex when compared with the control rats (25.1 ± 8.7 μL/g/min, p < 0.01). Application of VEGF antibody to the ischemic cortex of the hypoxic preconditioned animals reduced the Ki to the level of the control rats (13.6 ± 5.1 μL/g/min, p < 0.01). Our data demonstrated that hypoxic preconditioning increased BBB disruption through a VEGF related pathway and suggest the possibility of aggravation of brain edema by hypoxic preconditioning in the early stages of cerebral ischemia.
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Affiliation(s)
- Oak Z Chi
- Department of Anesthesiology, Rutgers Robert Wood Johnson Medical School, 125 Paterson Street, Suite 3100, New Brunswick, NJ 08901-1977, United States
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Zhang Z, Yang C, Shen M, Yang M, Jin Z, Ding L, Jiang W, Yang J, Chen H, Cao F, Hu T. Autophagy mediates the beneficial effect of hypoxic preconditioning on bone marrow mesenchymal stem cells for the therapy of myocardial infarction. Stem Cell Res Ther 2017; 8:89. [PMID: 28420436 PMCID: PMC5395756 DOI: 10.1186/s13287-017-0543-0] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 03/04/2017] [Accepted: 03/23/2017] [Indexed: 12/12/2022] Open
Abstract
Background Stem cell therapy has emerged as a promising therapeutic strategy for myocardial infarction (MI). However, the poor viability of transplanted stem cells hampers their therapeutic efficacy. Hypoxic preconditioning (HPC) can effectively promote the survival of stem cells. The aim of this study was to investigate whether HPC improved the functional survival of bone marrow mesenchymal stem cells (BM-MSCs) and increased their cardiac protective effect. Methods BM-MSCs, isolated from Tg(Fluc-egfp) mice which constitutively express both firefly luciferase (Fluc) and enhanced green fluorescent protein (eGFP), were preconditioned with HPC (1% O2) for 12 h, 24 h, 36 h, and 48 h, respectively, followed by 24 h of hypoxia and serum deprivation (H/SD) injury. Results HPC dose-dependently increased the autophagy in BM-MSCs. However, the protective effects of HPC for 24 h are most pronounced. Moreover, hypoxic preconditioned BM-MSCs (HPCMSCs) and nonhypoxic preconditioned BM-MSCs (NPCMSCs) were transplanted into infarcted hearts. Longitudinal in vivo bioluminescence imaging (BLI) and immunofluorescent staining revealed that HPC enhanced the survival of engrafted BM-MSCs. Furthermore, HPCMSCs significantly reduced fibrosis, decreased apoptotic cardiomyocytes, and preserved heart function. However, the beneficial effect of HPC was abolished by autophagy inhibition with 3-methyladenine (3-MA) and Atg7siRNA. Conclusion This study demonstrates that HPC may improve the functional survival and the therapeutic efficiencies of engrafted BM-MSCs, at least in part through autophagy regulation. Hypoxic preconditioning may serve as a promising strategy for optimizing cell-based cardiac regenerative therapy. Electronic supplementary material The online version of this article (doi:10.1186/s13287-017-0543-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Zheng Zhang
- Department of Cardiology, The General Hospital of the PLA Rocket Force, Beijing, 100088, China
| | - Chao Yang
- Department of Blood Transfusion, The General Hospital of the PLA Rocket Force, Beijing, 100088, China
| | - Mingzhi Shen
- Department of Cardiology, Hainan Branch of PLA General Hospital, Sanya, 572013, China
| | - Ming Yang
- Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 201306, China.,School of Basic Medical Sciences, Taishan Medical University, Taian, Shandong, 271000, China
| | - Zhitao Jin
- Department of Cardiology, The General Hospital of the PLA Rocket Force, Beijing, 100088, China
| | - Liping Ding
- Department of Cardiology, The General Hospital of the PLA Rocket Force, Beijing, 100088, China
| | - Wei Jiang
- Department of Cardiology, The General Hospital of the PLA Rocket Force, Beijing, 100088, China
| | - Junke Yang
- Department of Cardiology, The General Hospital of the PLA Rocket Force, Beijing, 100088, China
| | - Haixu Chen
- Core Laboratory of Translational Medicine, Institute of Geriatrics, PLA general Hospital, Beijing, 100853, China
| | - Feng Cao
- Department of Cardiology, The General Hospital of Chinese People's Liberation Army, Beijing, 100853, China.
| | - Taohong Hu
- Department of Cardiology, The General Hospital of the PLA Rocket Force, Beijing, 100088, China.
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Samura M, Hosoyama T, Takeuchi Y, Ueno K, Morikage N, Hamano K. Therapeutic strategies for cell-based neovascularization in critical limb ischemia. J Transl Med 2017; 15:49. [PMID: 28235425 PMCID: PMC5324309 DOI: 10.1186/s12967-017-1153-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 02/17/2017] [Indexed: 12/21/2022] Open
Abstract
Critical limb ischemia (CLI) causes severe ischemic rest pain, ulcer, and gangrene in the lower limbs. In spite of angioplasty and surgery, CLI patients without suitable artery inflow or enough vascular bed in the lesions are often forced to undergo amputation of a major limb. Cell-based therapeutic angiogenesis has the potential to treat ischemic lesions by promoting the formation of collateral vessel networks and the vascular bed. Peripheral blood mononuclear cells and bone marrow-derived mononuclear cells are the most frequently employed cell types in CLI clinical trials. However, the clinical outcomes of cell-based therapeutic angiogenesis using these cells have not provided the promised benefits for CLI patients, reinforcing the need for novel cell-based therapeutic angiogenesis strategies to cure untreatable CLI patients. Recent studies have demonstrated the possible enhancement of therapeutic efficacy in ischemic diseases by preconditioned graft cells. Moreover, judging from past clinical trials, the identification of adequate transplant timing and responders to cell-based therapy is important for improving therapeutic outcomes in CLI patients in clinical settings. Thus, to establish cell-based therapeutic angiogenesis as one of the most promising therapeutic strategies for CLI patients, its advantages and limitations should be taken into account.
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Affiliation(s)
- Makoto Samura
- Division of Vascular Surgery, Department of Surgery and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-kogushi, Ube, Yamaguchi, 755-8505, Japan
| | - Tohru Hosoyama
- Center for Regenerative Medicine, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-kogushi, Ube, Yamaguchi, 755-8505, Japan. .,Department of Surgery and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-kogushi, Ube, Yamaguchi, 755-8505, Japan. .,Center for Regenerative Medicine, Department of Surgery and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-kogushi, Ube, Yamaguchi, 755-8505, Japan.
| | - Yuriko Takeuchi
- Division of Vascular Surgery, Department of Surgery and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-kogushi, Ube, Yamaguchi, 755-8505, Japan
| | - Koji Ueno
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-kogushi, Ube, Yamaguchi, 755-8505, Japan
| | - Noriyasu Morikage
- Division of Vascular Surgery, Department of Surgery and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-kogushi, Ube, Yamaguchi, 755-8505, Japan
| | - Kimikazu Hamano
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of Medicine, 1-1-1 Minami-kogushi, Ube, Yamaguchi, 755-8505, Japan
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Li L, Wu S, Li P, Zhuo L, Gao Y, Xu Y. Hypoxic Preconditioning Combined with Microbubble-Mediated Ultrasound Effect on MSCs Promote SDF-1/CXCR4 Expression and its Migration Ability: An In Vitro Study. Cell Biochem Biophys 2015; 73:749-57. [PMID: 27259320 DOI: 10.1007/s12013-015-0698-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Our objective is to investigate the promoting effect of hypoxic preconditioning combined with microbubble (MB)-mediated ultrasound (US) on the SDF-1/CXCR4 expression and the migration ability of mesenchymal stem cells (MSCs). Based on the uniform design, the parameters of MB-mediated US, such as the total treatment time (T), acoustic intensity (Q), and the dosage of MBs, were optimized firstly. The results were assessed by regression analysis. Using the optimum irradiation parameters, the concentration of SDF-1 in the supernatant, the expression levels of membrane CXCR4, and the cell viability of hypoxic MSCs or normoxic MSCs were compared. The in vitro transwell migration assay was performed as well. The best combination of parameters for more SDF-1 secretion and less MSCs death was T = 30 s, A = 0.6 W/cm(2), and MB = 10(6)/ml. After 24 h of hypoxic preconditioning, the expression of SDF-1 and surface CXCR4 was increased in the hypoxic MSC group as compared to the normoxic MSC group (P < 0.05). On the basis of that, MB-mediated US could further upregulate the expression of SDF-1/CXCR4 with the optimum parameters (P < 0.05), while the cell viability was only decreased by about 9-10 % compared to the untreated groups. The number of successfully migrated cells was also the largest in the hypoxic preconditioning combined with MB-mediated US group than all the other groups. The results obtained indicate the combination of hypoxic preconditioning, and MB-mediated US can upregulate the SDF-1/CXCR4 expression and improve the migration ability in MSCs.
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Vesnina ZV, Lishmanov YB, Alexandrova EA, Nesterov EA. Evaluation of Nephroprotective Efficacy of Hypoxic Preconditioning in Patients Undergoing Coronary Artery Bypass Surgery. Cardiorenal Med 2016; 6:328-36. [PMID: 27648014 PMCID: PMC5020376 DOI: 10.1159/000446571] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 04/27/2016] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Nonpulsatile blood flow plays an important role in the pathogenesis of renal dysfunction in patients with extracorporeal circulation. In our opinion, hypoxic preconditioning (HP) can be used to protect kidneys from postsurgical dysfunction. The aim of this study was to evaluate nephroprotective efficacy of HP in myocardial revascularization with extracorporeal circulation. METHODS The randomized, controlled trial was performed in 63 patients undergoing coronary artery bypass grafting (CABG). Thirty-three patients were subjected to HP during CABG; 30 patients were included in the comparison group. All patients underwent dynamic renal scintigraphy with (99m)Тc-diethylenetriaminepentaacetic acid and were subjected to measuring the concentration of lipocalin in blood serum before and after CABG. RESULTS After CABG, the mean values of the total glomerular filtration rate (GFR) and GFR for each kidney significantly decreased only in patients of the comparison group. Significant increases in the concentration of serum neutrophil gelatinase-associated lipocalin occurred 5 h after surgery both in the group with HP (70.65 ± 46.71 to 127.58 ± 98.46 ng/ml) and in the comparison group (65.01 ± 38.64 to 171.65 ± 89.91 ng/ml). At the same time, the mean difference values between pre- and postoperative lipocalin levels were 56.94 ± 51.75 ng/ml in the study group and 106.64 ± 51.27 ng/ml in the comparison group; these differences were highly statistically significant (р = 0.004). CONCLUSION The results of our study showed that (i) HP exerts nephroprotection in patients undergoing on-pump CABG, and (ii) determination of the lipocalin-2 level can be used for early diagnosis of acute kidney injury in cardiac surgery patients.
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Affiliation(s)
- Zhaneta V. Vesnina
- Laboratory of Nuclear Medicine, Federal State Budgetary Scientific Institution ‘Research Institute for Cardiology’, Tomsk, Russian Federation
- National Research Tomsk Polytechnic University, Tomsk, Russian Federation
| | - Yury B. Lishmanov
- Laboratory of Nuclear Medicine, Federal State Budgetary Scientific Institution ‘Research Institute for Cardiology’, Tomsk, Russian Federation
- National Research Tomsk Polytechnic University, Tomsk, Russian Federation
| | - Ekaterina A. Alexandrova
- Department of Cardiovascular Surgery, Federal State Budgetary Scientific Institution ‘Research Institute for Cardiology’, Tomsk, Russian Federation
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Samoilov M, Churilova A, Gluschenko T, Vetrovoy O, Dyuzhikova N, Rybnikova E. Acetylation of histones in neocortex and hippocampus of rats exposed to different modes of hypobaric hypoxia: Implications for brain hypoxic injury and tolerance. Acta Histochem 2016; 118:80-9. [PMID: 26643215 DOI: 10.1016/j.acthis.2015.11.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 11/14/2015] [Accepted: 11/16/2015] [Indexed: 12/26/2022]
Abstract
Acetylation of nucleosome histones results in relaxation of DNA and its availability for the transcriptional regulators, and is generally associated with the enhancement of gene expression. Although it is well known that activation of a variety of pro-adaptive genes represents a key event in the development of brain hypoxic/ischemic tolerance, the role of epigenetic mechanisms, in particular histone acetylation, in this process is still unexplored. The aim of the present study was to investigate changes in acetylation of histones in vulnerable brain neurons using original well-standardized model of hypobaric hypoxia and preconditioning-induced tolerance of the brain. Using quantitative immunohistochemistry and Western blot, effects of severe injurious hypobaric hypoxia (SH, 180mm Hg, 3h) and neuroprotective preconditioning mode (three episodes of 360mm Hg for 2h spaced at 24h) on the levels of the acetylated proteins and acetylated H3 Lys24 (H3K24ac) in the neocortex and hippocampus of rats were studied. SH caused global repression of the acetylation processes in the neocortex (layers II-III, V) and hippocampus (CA1, CA3) by 3-24h, and this effect was prevented by the preconditioning. Moreover, hypoxic preconditioning remarkably increased the acetylation of H3K24 in response to SH in the brain areas examined. The preconditioning hypoxia without subsequent SH also stimulated acetylation processes in the neocortex and hippocampus. The moderately enhanced expression of the acetylated proteins in the preconditioned rats was maintained for 24h, whereas acetylation of H3K24 was intense but transient, peaked at 3h. The novel data obtained in the present study indicate that large activation of the acetylation processes, in particular acetylation of histones might be essential for the development of brain hypoxic tolerance.
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Affiliation(s)
- Mikhail Samoilov
- Laboratory of Regulation of Brain Neuron Functions, Pavlov Institute of Physiology, Russian Academy of Sciences, Makarova nab. 6, 199034 St. Petersburg, Russian Federation
| | - Anna Churilova
- Laboratory of Regulation of Brain Neuron Functions, Pavlov Institute of Physiology, Russian Academy of Sciences, Makarova nab. 6, 199034 St. Petersburg, Russian Federation
| | - Tatjana Gluschenko
- Laboratory of Regulation of Brain Neuron Functions, Pavlov Institute of Physiology, Russian Academy of Sciences, Makarova nab. 6, 199034 St. Petersburg, Russian Federation
| | - Oleg Vetrovoy
- Laboratory of Regulation of Brain Neuron Functions, Pavlov Institute of Physiology, Russian Academy of Sciences, Makarova nab. 6, 199034 St. Petersburg, Russian Federation; Department of Biochemistry, Faculty of Biology, St. Petersburg State University, 7-9, Universitetskaya nab., 199034 St. Petersburg, Russian Federation
| | - Natalia Dyuzhikova
- Laboratory of Genetics of High Nervous Activity, Pavlov Institute of Physiology, Russian Academy of Sciences, Makarova nab. 6, 199034 St. Petersburg, Russian Federation
| | - Elena Rybnikova
- Laboratory of Neuroendocrinology, Pavlov Institute of Physiology, Russian Academy of Sciences, Makarova nab. 6, 199034 St. Petersburg, Russian Federation.
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Liu JR, Liu Q, Khoury J, Li YJ, Han XH, Li J, Ibla JC. Hypoxic preconditioning decreases nuclear factor κB activity via Disrupted in Schizophrenia-1. Int J Biochem Cell Biol 2015; 70:140-8. [PMID: 26615762 DOI: 10.1016/j.biocel.2015.11.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 11/19/2015] [Accepted: 11/20/2015] [Indexed: 01/15/2023]
Abstract
Nuclear factor κB is a key mediator of inflammation during conditions of hypoxia. Here, we used models of hypoxic pre-conditioning as mechanism to decrease nuclear factor κB activity induced by hypoxia. Our initial studies suggested that Disrupted in Schizophrenia-1 may be induced by hypoxic pre-conditioning and possibly involved in the regulation of nuclear factor κB. In this study we used Disrupted in Schizophrenia-1 exogenous over-expression and knock-down to determine its effect on ataxia telangiectasia mutated--nuclear factor κB activation cascade. Our results demonstrated that hypoxic pre-conditioning significantly increased the expression of Disrupted in Schizophrenia-1 at mRNA and protein levels both in vitro and in vivo. Over-expression of Disrupted in Schizophrenia-1 significantly attenuated the hypoxia-mediated ataxia telangiectasia mutated phosphorylation and prevented its cytoplasm translocation where it functions to activate nuclear factor κB. We further determined that Disrupted in Schizophrenia-1 activated the protein phosphatase 2A, preventing the phosphorylation of ataxia telangiectasia mutated serine-1981, the main regulatory site of ataxia telangiectasia mutated activity. Cellular levels of Disrupted in Schizophrenia-1 protein significantly decreased nuclear factor κB activation profiles and pro-inflammatory gene expression. Taken together, these results demonstrate that hypoxic pre-conditioning decreases the activation of nuclear factor κB through the transcriptional induction of Disrupted in Schizophrenia-1.
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Affiliation(s)
- Jia-Ren Liu
- Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital and Harvard Medical School, Boston, MA 02115, United States.
| | - Qian Liu
- Department of Pediatric Surgery, The First Affiliated Hospital of GanNan Medical University, JiangXi 341000, PR China
| | - Joseph Khoury
- Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital and Harvard Medical School, Boston, MA 02115, United States
| | - Yue-Jin Li
- Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital and Harvard Medical School, Boston, MA 02115, United States
| | - Xiao-Hui Han
- Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital and Harvard Medical School, Boston, MA 02115, United States
| | - Jing Li
- Laboratory of Stem Cell and Tissue Engineering, Department of Histology and Embryology, Chongqing Medical University, Chongqing 400016, PR China
| | - Juan C Ibla
- Department of Anesthesiology, Perioperative and Pain Medicine, Boston Children's Hospital and Harvard Medical School, Boston, MA 02115, United States.
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Shu L, Wang C, Wang J, Zhang Y, Zhang X, Yang Y, Zhuo J, Liu J. The neuroprotection of hypoxic preconditioning on rat brain against traumatic brain injury by up-regulated transcription factor Nrf2 and HO-1 expression. Neurosci Lett 2015; 611:74-80. [PMID: 26590328 DOI: 10.1016/j.neulet.2015.11.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 10/23/2015] [Accepted: 11/09/2015] [Indexed: 01/30/2023]
Abstract
Hypoxic preconditioning (HPC) increases the inherent tolerance of brain tissue suffering from severe hypoxia or ischemia insult by stimulating the protective ability of the brain. However, little is known concerning the effect of HPC on traumatic brain injury (TBI). We designed this study to investigate the effect of HPC on TBI and explore its underlying mechanisms. We found that HPC significantly alleviates neurological dysfunction, lessens brain edema, reduces cell apoptosis, increases neuronal survival, up-regulates the expressions of Nrf2 and HO-1, and decreases the inducer of protein carbonyls, 4-hydroxy-2-nonenal, and 8-hydroxy-2-deoxyguanosine in the brain tissue of rats 24h after brain injury. However, no influence was observed in normal rats after only 3d of hypoxic training. Results further indicated that HPC protects the brain against traumatic damage. This protective effect may be achieved by up-regulating Nrf2 and HO-1 expression and alleviating oxidative stress damage.
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Affiliation(s)
- Longfei Shu
- Department of Neurosurgery, 105 Hospital of PLA, Clinical College of PLA, Anhui Medical University, Hefei, Anhui 230031, China
| | - Chunlin Wang
- Department of Neurosurgery, 105 Hospital of PLA, Clinical College of PLA, Anhui Medical University, Hefei, Anhui 230031, China
| | - Jinbiao Wang
- Department of Neurosurgery, 105 Hospital of PLA, Clinical College of PLA, Anhui Medical University, Hefei, Anhui 230031, China
| | - Yongming Zhang
- Department of Neurosurgery, 105 Hospital of PLA, Clinical College of PLA, Anhui Medical University, Hefei, Anhui 230031, China
| | - Xing Zhang
- Department of Neurosurgery, 105 Hospital of PLA, Clinical College of PLA, Anhui Medical University, Hefei, Anhui 230031, China
| | - Yanyan Yang
- Department of Neurosurgery, 105 Hospital of PLA, Clinical College of PLA, Anhui Medical University, Hefei, Anhui 230031, China
| | - Jianwei Zhuo
- Department of Neurosurgery, 105 Hospital of PLA, Clinical College of PLA, Anhui Medical University, Hefei, Anhui 230031, China
| | - Jiachuan Liu
- Department of Neurosurgery, 105 Hospital of PLA, Clinical College of PLA, Anhui Medical University, Hefei, Anhui 230031, China.
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Randhawa PK, Jaggi AS. TRPV4 channels: physiological and pathological role in cardiovascular system. Basic Res Cardiol 2015; 110:54. [PMID: 26415881 DOI: 10.1007/s00395-015-0512-7] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 09/11/2015] [Accepted: 09/22/2015] [Indexed: 12/12/2022]
Abstract
TRPV4 channels are non-selective cation channels permeable to Ca(2+), Na(+), and Mg(2+) ions. Recently, TRPV4 channels have received considerable attention as these channels are widely expressed in the cardiovascular system including endothelial cells, cardiac fibroblasts, vascular smooth muscles, and peri-vascular nerves. Therefore, these channels possibly play a pivotal role in the maintenance of cardiovascular homeostasis. TRPV4 channels critically regulate flow-induced arteriogenesis, TGF-β1-induced differentiation of cardiac fibroblasts into myofibroblasts, and heart failure-induced pulmonary edema. These channels also mediate hypoxia-induced increase in proliferation and migration of pulmonary artery smooth muscle cells and progression of pulmonary hypertension. These channels also maintain flow-induced vasodilation and preserve vascular function by directly activating Ca(2+)-dependent KCa channels. Furthermore, these may also induce vasodilation and maintain blood pressure indirectly by evoking the release of NO, CGRP, and substance P. The present review discusses the evidences and the potential mechanisms implicated in diverse responses including arteriogenesis, cardiac remodeling, congestive heart failure-induced pulmonary edema, pulmonary hypertension, flow-induced dilation, regulation of blood pressure, and hypoxic preconditioning.
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Affiliation(s)
- Puneet Kaur Randhawa
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University Patiala, Patiala, 147002, India
| | - Amteshwar Singh Jaggi
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University Patiala, Patiala, 147002, India.
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Hu X, Wu R, Jiang Z, Wang L, Chen P, Zhang L, Yang L, Wu Y, Chen H, Chen H, Xu Y, Zhou Y, Huang X, Webster KA, Yu H, Wang J. Leptin signaling is required for augmented therapeutic properties of mesenchymal stem cells conferred by hypoxia preconditioning. Stem Cells 2015; 32:2702-13. [PMID: 24989835 DOI: 10.1002/stem.1784] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 04/27/2014] [Accepted: 05/10/2014] [Indexed: 12/22/2022]
Abstract
Hypoxia preconditioning enhances the therapeutic effect of mesenchymal stem cells (MSCs). However, the mechanism underlying hypoxia-induced augmentation of the protective effect of MSCs on myocardial infarction (MI) is poorly understood. We show that hypoxia-enhanced survival, mobility, and protection of cocultured cardiomyocytes were paralleled by increased expression of leptin and cell surface receptor CXCR4. The enhanced activities were abolished by either knockdown of leptin with a selective shRNA or by genetic deficiency of leptin or its receptor in MSCs derived, respectively, from ob/ob or db/db mice. To characterize the role of leptin in the regulation of MSC functions by hypoxia and its possible contribution to enhanced therapeutic efficacy, cell therapy using MSCs derived from wild-type, ob/ob, or db/db mice was implemented in mouse models of acute MI. Augmented protection by hypoxia pretreatment was only seen with MSCs from wild-type mice. Parameters that were differentially affected by hypoxia pretreatment included MSC engraftment, c-Kit(+) cell recruitment to the infarct, vascular density, infarct size, and long-term contractile function. These data show that leptin signaling is an early and essential step for the enhanced survival, chemotaxis, and therapeutic properties of MSCs conferred by preculture under hypoxia. Leptin may play a physiological role in priming MSCs resident in the bone marrow endosteum for optimal response to systemic signaling molecules and subsequent tissue repair.
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Affiliation(s)
- Xinyang Hu
- Department of Cardiology, Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China; Cardiovascular Key Laboratory of Zhejiang Province, Hangzhou, China
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Cui C, Zhou T, Li J, Wang H, Li X, Xiong J, Xu P, Xue M. Proteomic analysis of the mouse brain after repetitive exposure to hypoxia. Chem Biol Interact 2015; 236:57-66. [PMID: 25937538 DOI: 10.1016/j.cbi.2015.04.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2014] [Revised: 02/04/2015] [Accepted: 04/09/2015] [Indexed: 10/23/2022]
Abstract
Hypoxic preconditioning (HPC) is known to have a protective effect against hypoxic damage; however, the precise mechanisms involved remain unknown. In this study, an acute and repetitive hypoxia mouse model, two-dimensional fluorescence difference gel electrophoresis (2D-DIGE) coupled with matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF/TOF-MS), and Western blot experiments were used to identify the differential expression of key proteins in the mouse brain during HPC. Approximately 2100 2D-DIGE spots were observed following gel imaging and spot detection. Significant differences (p < 0.05) in the expression of 66 proteins were observed between the 3× HPC treatment group and the control group, 45 proteins were observed between the 6× HPC treatment group and the control group, and 70 proteins were observed between the 3× HPC treatment group and the 6× HPC group. Consistent results among Western blot, 2D-DIGE and MS methods were observed for the proteins, ATP synthase subunit alpha, malate dehydrogenase, guanine nucleotide-binding protein subunit beta-1 and proteasome subunit alpha type-2. The proteins associated with ATP synthesis and the citric acid cycle were down-regulated, while those linked to glycolysis and oxygen-binding were up-regulated. This proteomic analysis of the mouse brain after HPC furthers understanding of the molecular pathways involved in the protective effect of HPC and these findings provide new insight into the mechanisms of hypoxia and HPC.
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Affiliation(s)
- Can Cui
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 10069, China
| | - Tao Zhou
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 10069, China
| | - Jingyi Li
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 10069, China
| | - Hong Wang
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 10069, China
| | - Xiaorong Li
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 10069, China; Beijing Laboratory for Biomedical Detection Technology and Instrument, Beijing 100069, China
| | - Jie Xiong
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 10069, China; Beijing Laboratory for Biomedical Detection Technology and Instrument, Beijing 100069, China
| | - Pingxiang Xu
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 10069, China; Beijing Laboratory for Biomedical Detection Technology and Instrument, Beijing 100069, China
| | - Ming Xue
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 10069, China; Beijing Laboratory for Biomedical Detection Technology and Instrument, Beijing 100069, China.
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Parmar J, Jones NM. Hypoxic preconditioning can reduce injury-induced inflammatory processes in the neonatal rat brain. Int J Dev Neurosci 2015; 43:35-42. [PMID: 25824817 DOI: 10.1016/j.ijdevneu.2015.03.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 03/26/2015] [Accepted: 03/26/2015] [Indexed: 12/20/2022] Open
Abstract
Inflammation plays an important role in the pathophysiology of neonatal hypoxic-ischemic (HI) brain injury. Studies have shown that hypoxic preconditioning (HP) can ameliorate brain damage, but its effects on inflammation remain unknown. Postnatal day 6 (P6), Sprague-Dawley rats were divided into normoxia and hypoxia (8% oxygen, 3h) groups. On P7, some pups underwent a right carotid artery occlusion followed by hypoxia (8% oxygen, 3h) while under 1.5% isofluorane anesthesia and the remaining pups underwent sham surgery without occlusion. Animals were sacrificed 5 days later and fixed tissue was used to examine changes in neurons, astrocytes, and microglia in the cortex. Fresh tissue was collected to determine cortical levels of proinflammatory cytokines using ELISA. There was a significant loss in the number of NeuN positive cells in the cortex following HI injury, which was improved when HP was given prior to HI. There was an increase in cortical area of astrocyte staining after HI injury compared to control. HP before HI was able to reduce area of GFAP staining back to control levels. HI caused a large increase in the number of activated microglia compared to control and HP was able to significantly reduce this, although not back to control levels. HP alone increased microglial activation. Interleukin-1β levels were increased in the cortex 5 days after HI, but HP was not able to significantly reduce this change. The neuroprotective effects of HP appear to be mediated by affecting cellular inflammatory processes in the brain following HI injury.
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Affiliation(s)
- Jasneet Parmar
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, New South Wales, Australia
| | - Nicole M Jones
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, New South Wales, Australia.
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Sun J, Wei ZZ, Gu X, Zhang JY, Zhang Y, Li J, Wei L. Intranasal delivery of hypoxia-preconditioned bone marrow-derived mesenchymal stem cells enhanced regenerative effects after intracerebral hemorrhagic stroke in mice. Exp Neurol 2015; 272:78-87. [PMID: 25797577 DOI: 10.1016/j.expneurol.2015.03.011] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 03/10/2015] [Accepted: 03/13/2015] [Indexed: 12/11/2022]
Abstract
Intracerebral hemorrhagic stroke (ICH) causes high mortality and morbidity with very limited treatment options. Cell-based therapy has emerged as a novel approach to replace damaged brain tissues and promote regenerative processes. In this study we tested the hypothesis that intranasally delivered hypoxia-preconditioned BMSCs could reach the brain, promote tissue repair and improve functional recovery after ICH. Hemorrhagic stroke was induced in adult C57/B6 mice by injection of collagenase IV into the striatum. Animals were randomly divided into three groups: sham group, intranasal BMSC treatment group, and vehicle treatment group. BMSCs were pre-treated with hypoxic preconditioning (HP) and pre-labeled with Hoechst before transplantation. Behavior tests, including the mNSS score, rotarod test, adhesive removal test, and locomotor function evaluation were performed at varying days, up to 21days, after ICH to evaluate the therapeutic effects of BMSC transplantation. Western blots and immunohistochemistry were performed to analyze the neurotrophic effects. Intranasally delivered HP-BMSCs were identified in peri-injury regions. NeuN+/BrdU+ co-labeled cells were markedly increased around the hematoma region, and growth factors, including BDNF, GDNF, and VEGF were significantly upregulated in the ICH brain after BMSC treatment. The BMSC treatment group showed significant improvement in behavioral performance compared with the vehicle group. Our data also showed that intranasally delivered HP-BMSCs migrated to peri-injury regions and provided growth factors to increase neurogenesis after ICH. We conclude that intranasal administration of BMSC is an effective treatment for ICH, and that it enhanced neuroregenerative effects and promoted neurological functional recovery after ICH. Overall, the investigation supports the potential therapeutic strategy for BMSC transplantation therapy against hemorrhagic stroke.
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Affiliation(s)
- Jinmei Sun
- Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; Laboratories of Stem Cell Biology and Neural Regeneration and Function Recovery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Zheng Zachory Wei
- Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; Laboratories of Stem Cell Biology and Neural Regeneration and Function Recovery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Xiaohuan Gu
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - James Ya Zhang
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Yongbo Zhang
- Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; Laboratories of Stem Cell Biology and Neural Regeneration and Function Recovery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Jimei Li
- Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; Laboratories of Stem Cell Biology and Neural Regeneration and Function Recovery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
| | - Ling Wei
- Department of Neurology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; Laboratories of Stem Cell Biology and Neural Regeneration and Function Recovery, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China; Department of Anesthesiology, Emory University School of Medicine, Atlanta, GA 30322, USA; Department of Neurology, Emory University School of Medicine, Atlanta, GA 30322, USA.
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Sun HS, Xu B, Chen W, Xiao A, Turlova E, Alibraham A, Barszczyk A, Bae CYJ, Quan Y, Liu B, Pei L, Sun CLF, Deurloo M, Feng ZP. Neuronal K(ATP) channels mediate hypoxic preconditioning and reduce subsequent neonatal hypoxic-ischemic brain injury. Exp Neurol 2014; 263:161-71. [PMID: 25448006 DOI: 10.1016/j.expneurol.2014.10.003] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 08/23/2014] [Accepted: 10/10/2014] [Indexed: 12/16/2022]
Abstract
Neonatal hypoxic-ischemic brain injury and its related illness hypoxic-ischemic encephalopathy (HIE) are major causes of nervous system damage and neurological morbidity in children. Hypoxic preconditioning (HPC) is known to be neuroprotective in cerebral ischemic brain injury. K(ATP) channels are involved in ischemic preconditioning in the heart; however the involvement of neuronal K(ATP) channels in HPC in the brain has not been fully investigated. In this study, we investigated the role of HPC in hypoxia-ischemia (HI)-induced brain injury in postnatal seven-day-old (P7) CD1 mouse pups. Specifically, TTC (2,3,5-triphenyltetrazolium chloride) staining was used to assess the infarct volume, TUNEL (Terminal deoxynucleotidyl transferase mediated dUTP nick end-labeling) to detect apoptotic cells, Western blots to evaluate protein level, and patch-clamp recordings to measure K(ATP) channel current activities. Behavioral tests were performed to assess the functional recovery after hypoxic-ischemic insults. We found that hypoxic preconditioning reduced infarct volume, decreased the number of TUNEL-positive cells, and improved neurobehavioral functional recovery in neonatal mice following hypoxic-ischemic insults. Pre-treatment with a K(ATP) channel blocker, tolbutamide, inhibited hypoxic preconditioning-induced neuroprotection and augmented neurodegeneration following hypoxic-ischemic injury. Pre-treatment with a K(ATP) channel opener, diazoxide, reduced infarct volume and mimicked hypoxic preconditioning-induced neuroprotection. Hypoxic preconditioning induced upregulation of the protein level of the Kir6.2 isoform and enhanced current activities of K(ATP) channels. Hypoxic preconditioning restored the HI-reduced PKC and pAkt levels, and reduced caspase-3 level, while tolbutamide inhibited the effects of hypoxic preconditioning. We conclude that K(ATP) channels are involved in hypoxic preconditioning-induced neuroprotection in neonatal hypoxic-ischemic brain injury. K(ATP) channel openers may therefore have therapeutic effects in neonatal hypoxic-ischemic brain injury.
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Affiliation(s)
- Hong-Shuo Sun
- Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada; Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada; Department of Pharmacology & Toxicology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada; Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada.
| | - Baofeng Xu
- Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada; Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Wenliang Chen
- Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada; Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Aijiao Xiao
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Ekaterina Turlova
- Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada; Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Ammar Alibraham
- Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada; Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Andrew Barszczyk
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Christine Y J Bae
- Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada; Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Yi Quan
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Baosong Liu
- Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada; Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Lin Pei
- Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada; Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Christopher L F Sun
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada; Faculty of Applied Science & Engineering, University of Toronto, Toronto, Ontario M5S 1A4, Canada
| | - Marielle Deurloo
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Zhong-Ping Feng
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada.
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48
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Suryana E, Jones NM. The effects of hypoxic preconditioning on white matter damage following hypoxic-ischaemic injury in the neonatal rat brain. Int J Dev Neurosci 2014; 37:69-75. [PMID: 25009121 DOI: 10.1016/j.ijdevneu.2014.06.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 06/13/2014] [Accepted: 06/13/2014] [Indexed: 11/17/2022] Open
Abstract
Myelination is an essential process in human development that is carried out by oligodendrocytes in the central nervous system. Hypoxic-ischaemic (HI) brain injury can disrupt myelination by causing oxidative stress, inflammation and excitotoxicity, resulting in the loss of myelin as well as cells of the oligodendrocyte lineage. We have previously shown that hypoxic preconditioning (HP) can protect against HI injury, however, to date there have been no reports of its effects on white matter injury. Sprague-Dawley rat pups (postnatal day (P) 6) were placed into control and HP groups. On P7, pups were further separated into HI and sham surgery groups. HI pups underwent a unilateral common carotid artery occlusion and then exposed to 8% oxygen for 3h. Sham pups underwent the same procedure without occlusion and were maintained in room air. Brains were removed 5 days post-surgery for analysis. In HI-only pups there was a significant reduction in brain volume observed. Consequently, when HP was performed prior to HI, the loss of brain tissue was prevented. The number of early and late oligodendrocyte progenitors (preOLs) in the corpus callosum was unaffected by HI, however, HI reduced the amount of myelin basic protein, indicating that HI may inhibit the maturation of preOLs. Whilst HP did not affect preOL density, it was found to prevent the loss of myelin caused by HI. This indicates that HP may either protect myelin directly or possibly promote the maturation of preOLs to regenerate the lost or damaged myelin.
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Affiliation(s)
- Eurwin Suryana
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW 2052, Australia
| | - Nicole M Jones
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW 2052, Australia.
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49
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Huang WY, Jou MJ, Peng TI. Hypoxic preconditioning-induced mitochondrial protection is not disrupted in a cell model of mtDNA T8993G mutation-induced F1F0-ATP synthase defect: the role of mitochondrial permeability transition. Free Radic Biol Med 2014; 67:314-29. [PMID: 24291231 DOI: 10.1016/j.freeradbiomed.2013.11.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2013] [Revised: 10/24/2013] [Accepted: 11/21/2013] [Indexed: 10/26/2022]
Abstract
Transient opening of the mitochondrial permeability transition pore plays a crucial role in hypoxic preconditioning-induced protection. Recently, the cyclophilin-D component of the mitochondrial permeability transition pore has been shown to interact with and regulate the F1F0-ATP synthase. However, the precise role of the F1F0-ATP synthase and the interaction between cyclophilin-D and F1F0-ATP synthase in the mitochondrial permeability transition pore and hypoxic preconditioning remain uncertain. Here we found that a 1-h hypoxic preconditioning delayed apoptosis and improved cell survival after stimulation with various apoptotic inducers including H2O2, ionomycin, and arachidonic acid in mitochondrial DNA T8993G mutation (NARP) osteosarcoma 143B cybrids, an F1F0-ATP synthase defect cell model. This hypoxic preconditioning protected NARP cybrid cells against focal laser irradiation-induced oxidative stress by suppressing reactive oxygen species formation and preventing the depletion of cardiolipin. Furthermore, the protective functions of transient opening of the mitochondrial permeability transition pore in both NARP cybrids and wild-type 143B cells can be augmented by hypoxic preconditioning. Disruption of the interaction between cyclophilin-D and F1F0-ATP synthase by cyclosporin A attenuated the mitochondrial protection induced by hypoxic preconditioning in both NARP cybrids and wild-type 143B cells. Our results demonstrate that the interaction between cyclophilin-D and F1F0-ATP synthase is important in the hypoxic preconditioning-induced cell protection. This finding improves our understanding of the mechanism of mitochondrial permeability transition pore opening in cells in response to hypoxic preconditioning, and will be helpful in further developing new pharmacological agents targeting hypoxia-reoxygenation injury and mitochondria-mediated cell death.
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Affiliation(s)
- Wen-Yi Huang
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan 333, Taiwan; Department of Neurology, Chang Gung Memorial Hospital, Keelung Branch, Keelung 204, Taiwan
| | - Mei-Jie Jou
- Department of Physiology and Pharmacology, and Chang Gung University, Kwei-Shan, Tao-Yuan 333, Taiwan
| | - Tsung-I Peng
- Department of Neurology, Chang Gung Memorial Hospital, Keelung Branch, Keelung 204, Taiwan; Department of Medicine, College of Medicine, Chang Gung University, Kwei-Shan, Tao-Yuan 333, Taiwan.
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50
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Kudo T, Hosoyama T, Samura M, Katsura S, Nishimoto A, Kugimiya N, Fujii Y, Li TS, Hamano K. Hypoxic preconditioning reinforces cellular functions of autologous peripheral blood-derived cells in rabbit hindlimb ischemia model. Biochem Biophys Res Commun 2014; 444:370-5. [PMID: 24463101 DOI: 10.1016/j.bbrc.2014.01.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 01/15/2014] [Indexed: 11/29/2022]
Abstract
Peripheral blood mononuclear cell (PBMNC) is one of powerful tools for therapeutic angiogenesis in hindlimb ischemia. However, traditional approaches with transplanted PBMNCs show poor therapeutic effects in severe ischemia patients. In this study, we used autograft models to determine whether hypoxic pretreatment effectively enhances the cellular functions of PBMNCs and improves hindlimb ischemia. Rabbit PBMNCs were cultured in the hypoxic condition. After pretreatment, cell adhesion, stress resistance, and expression of angiogenic factor were evaluated in vitro. To examine in vivo effects, we autografted preconditioned PBMNCs into a rabbit hindlimb ischemia model on postoperative day (POD) 7. Preconditioned PBMNCs displayed significantly enhanced functional capacities in resistance to oxidative stress, cell viability, and production of vascular endothelial growth factor. In addition, autologous transplantation of preconditioned PBMNCs significantly induced new vessels and improved limb blood flow. Importantly, preconditioned PBMNCs can accelerate vessel formation despite transplantation on POD 7, whereas untreated PBMNCs showed poor vascularization. Our study demonstrated that hypoxic preconditioning of PBMNCs is a feasible approach for increasing the retention of transplanted cells and enhancing therapeutic angiogenesis in ischemic tissue.
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Affiliation(s)
- Tomoaki Kudo
- Department of Surgery and Clinical Science, Division of Cardiac Surgery, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Tohru Hosoyama
- Department of Surgery and Clinical Science, Division of Cardiac Surgery, Yamaguchi University Graduate School of Medicine, Ube, Japan.
| | - Makoto Samura
- Department of Surgery and Clinical Science, Division of Cardiac Surgery, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Shunsaku Katsura
- Department of Surgery and Clinical Science, Division of Cardiac Surgery, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Arata Nishimoto
- Department of Surgery and Clinical Science, Division of Cardiac Surgery, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Naruji Kugimiya
- Department of Surgery and Clinical Science, Division of Cardiac Surgery, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Yasuhiko Fujii
- Department of Blood Transfusion Regeneration and Cell Therapy Center, Yamaguchi University Graduate School of Medicine, Ube, Japan
| | - Tao-Sheng Li
- Department of Stem Cell Biology, Nagasaki University Graduate School of Biomedical Science, Nagasaki, Japan
| | - Kimikazu Hamano
- Department of Surgery and Clinical Science, Division of Cardiac Surgery, Yamaguchi University Graduate School of Medicine, Ube, Japan
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