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Liu X, Lei Z, Gilhooly D, He J, Li Y, Ritzel RM, Li H, Wu LJ, Liu S, Wu J. Traumatic brain injury-induced inflammatory changes in the olfactory bulb disrupt neuronal networks leading to olfactory dysfunction. Brain Behav Immun 2023; 114:22-45. [PMID: 37557959 PMCID: PMC10910858 DOI: 10.1016/j.bbi.2023.08.004] [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: 12/14/2022] [Revised: 06/14/2023] [Accepted: 08/06/2023] [Indexed: 08/11/2023] Open
Abstract
Approximately 20-68% of traumatic brain injury (TBI) patients exhibit trauma-associated olfactory deficits (OD) which can compromise not only the quality of life but also cognitive and neuropsychiatric functions. However, few studies to date have examined the impact of experimental TBI on OD. The present study examined inflammation and neuronal dysfunction in the olfactory bulb (OB) and the underlying mechanisms associated with OD in male mice using a controlled cortical impact (CCI) model. TBI caused a rapid inflammatory response in the OB as early as 24 h post-injury, including elevated mRNA levels of proinflammatory cytokines, increased numbers of microglia and infiltrating myeloid cells, and increased IL1β and IL6 production in these cells. These changes were sustained for up to 90 days after TBI. Moreover, we observed significant upregulation of the voltage-gated proton channel Hv1 and NOX2 expression levels, which were predominantly localized in microglia/macrophages and accompanied by increased reactive oxygen species production. In vivo OB neuronal firing activities showed early neuronal hyperexcitation and later hypo-neuronal activity in both glomerular layer and mitral cell layer after TBI, which were improved in the absence of Hv1. In a battery of olfactory behavioral tests, WT/TBI mice displayed significant OD. In contrast, neither Hv1 KO/TBI nor NOX2 KO/TBI mice showed robust OD. Finally, seven days of intranasal delivery of a NOX2 inhibitor (NOX2ds-tat) ameliorated post-traumatic OD. Collectively, these findings highlight the importance of OB neuronal networks and its role in TBI-mediated OD. Thus, targeting Hv1/NOX2 may be a potential intervention for improving post-traumatic anosmia.
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Affiliation(s)
- Xiang Liu
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Zhuofan Lei
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Dylan Gilhooly
- Department of Anatomy, Howard University College of Medicine, Washington, DC 20059 USA
| | - Junyun He
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Yun Li
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Rodney M Ritzel
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Hui Li
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Long-Jun Wu
- Department of Neurology, Mayo Clinic, Rochester, MN 55905, USA
| | - Shaolin Liu
- Department of Anatomy, Howard University College of Medicine, Washington, DC 20059 USA; Center for Neurological Disease Research, Department of Physiology and Pharmacology, Department of Biomedical Sciences, University of Georgia College of Veterinary Medicine, Athens, GA 30602, USA.
| | - Junfang Wu
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA.
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Fang M, Lei Z, Ruilin M, Jing W, Leqiang D. High temperature stress induced oxidative stress, gut inflammation and disordered metabolome and microbiome in tsinling lenok trout. Ecotoxicol Environ Saf 2023; 266:115607. [PMID: 37862746 DOI: 10.1016/j.ecoenv.2023.115607] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 10/09/2023] [Accepted: 10/14/2023] [Indexed: 10/22/2023]
Abstract
Tsinling lenok trout (Brachymystax lenok tsinlingensis Li) is a species of cold-water salmon that faces serious challenges due to global warming. High temperature stress has been found to damage the gut integrity of cold-water fish, impacting their growth and immunity. However, limited research exists on the causal relationship between gut microbial disturbance and metabolic dysfunction in cold-water fish induced by high temperature stress. To address this gap, we conducted a study to investigate the effects of high temperature stress (24 °C) on the gut tissue structure, antioxidant capacity, gut microorganisms, and metabolome reactions of tsinling lenok trout. Our analysis using 16 S rDNA gene sequencing revealed significant changes in the gut microbial composition and metabolic profile. Specifically, the abundance of Firmicutes and Gemmatimonadetes decreased significantly with increasing temperature, while the abundance of Bacteroidetes increased significantly. Metabolic analysis revealed a significant decrease in the abundance of glutathione, which is synthesized from glutamate and glycine, under high temperature stress. Additionally, there was a notable reduction in the levels of adenosine, inosine, xanthine, guanosine, and deoxyguanosine, which are essential for DNA/RNA synthesis. Conversely, there was a significant increase in the abundance of D-glucose 6 P. Furthermore, high temperature stress adversely affects intestinal structure and barrier function. Our findings provide valuable insights into the mechanism of high temperature stress in cold-water fish and serve as a foundation for future research aimed at mitigating the decline in production performance caused by such stress.
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Affiliation(s)
- M Fang
- Key Laboratory of Resource Utilization of Agricultural Solid Waste in Gansu Province, Tianshui Normal University, South Xihe Road, Qinzhou, Tianshui 741000, Gansu, PR China.
| | - Z Lei
- Key Laboratory of Resource Utilization of Agricultural Solid Waste in Gansu Province, Tianshui Normal University, South Xihe Road, Qinzhou, Tianshui 741000, Gansu, PR China
| | - M Ruilin
- Key Laboratory of Resource Utilization of Agricultural Solid Waste in Gansu Province, Tianshui Normal University, South Xihe Road, Qinzhou, Tianshui 741000, Gansu, PR China
| | - W Jing
- Key Laboratory of Resource Utilization of Agricultural Solid Waste in Gansu Province, Tianshui Normal University, South Xihe Road, Qinzhou, Tianshui 741000, Gansu, PR China
| | - D Leqiang
- Key Laboratory of Resource Utilization of Agricultural Solid Waste in Gansu Province, Tianshui Normal University, South Xihe Road, Qinzhou, Tianshui 741000, Gansu, PR China
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Yang H, Wu Y, Sui J, Wang N, Lei Z, He J. Single Cell Analysis of Macrophage Heterogeneity and NK-Cell Exhaustion in Lewis Lung Cancer Xenograft Tumor. Int J Radiat Oncol Biol Phys 2023; 117:e271. [PMID: 37785026 DOI: 10.1016/j.ijrobp.2023.06.1238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Stereotactic body radiation therapy (SBRT) has attracted much attention because of its ability to stimulate anti-tumor immune response. However, the mechanism of SBRT reprogramming the tumor microenvironment remains to be elucidated. MATERIALS/METHODS Using Lewis lung carcinoma (LLC) xenograft mice model treated with SBRT (8Gy x 3F), multiplex assay was performed to measure serum chemokine levels, and single-cell RNA sequencing was performed to assess tumor microenvironment. The differential expression genes of each cell subcluster were identified by the "Find-All markers" function with default parameters provided by Seurat. Intercellular communication analysis was explored by using CellPhone DB package. RESULTS The majority of serum chemokines involved macrophage recruitment, including CCL3, CCL4, CCL8, and CCL20, were highly secreted at 7 days after SBRT. Single-cell RNA sequencing of 108,741 cells were contained from 6 mouse Lewis lung carcinoma samples (n = 3 tumors for SBRT, n = 3 tumors pooled for SHAM). Besides Lewis cancer cells, myeloid cells were 57.61% ,70.82% in Sham-irradiation (SHAM) and SBRT while NT and T cells were 20.50%, 7.81% in SHAM and SBRT, respectively. When compared with SHAM group, upregulation of Ccl3, Ccl4, Ccl8 chemokine genes were observed in cancer cells of SBRT group. Differential expression genes analysis showed high expression level of Ccl8 (Log2FC 2.54, p<0.01) in cluster of Mrc1+macrophage. The SBRT group consisted of more Ccl8+Mrc1+macrophages (proportion 36.28% for SBRT, 27.44% for SHAM) and exhausted NK cells (proportion 22.56% for SBRT, 13.70% for SHAM). More importantly, intercellular communication analysis revealed a potential communication network between Ccl8+Mrc1+macrophages and exhausted NK cells. CONCLUSION Our results provide a potential therapeutic strategy by disrupting Ccl8+ Mrc1+macrophages and NK-cell interaction to facilitate the stimulation of the anti-tumor immune response by SBRT.
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Affiliation(s)
- H Yang
- College of Bioengineering, Chongqing University, Chongqing, China, Chongqing, China
| | - Y Wu
- Oncology Radiotherapy Center of Chongqing University Cancer Hospital, Chongqing, China
| | - J Sui
- College of Medicine, Chongqing University, Chongqing, China
| | - N Wang
- Chongqing university, Chongqing, China
| | - Z Lei
- College of Medicine, Chongqing University, Chongqing, China, Chongqing, China
| | - J He
- College of Bioengineering, Chongqing University, Chongqing, China, Chongqing, China
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Li Y, Khan N, Ritzel RM, Lei Z, Allen S, Faden AI, Wu J. Sexually dimorphic extracellular vesicle responses after chronic spinal cord injury are associated with neuroinflammation and neurodegeneration in the aged brain. J Neuroinflammation 2023; 20:197. [PMID: 37653491 PMCID: PMC10469550 DOI: 10.1186/s12974-023-02881-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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 08/27/2023] [Indexed: 09/02/2023] Open
Abstract
BACKGROUND Medical advances have made it increasingly possible for spinal cord injury (SCI) survivors to survive decades after the insult. But how SCI affects aging changes and aging impacts the injury process have received limited attention. Extracellular vesicles (EVs) are recognized as critical mediators of neuroinflammation after CNS injury, including at a distance from the lesion site. We have previously shown that SCI in young male mice leads to robust changes in plasma EV count and microRNA (miR) content. Here, our goal was to investigate the impact of biological sex and aging on EVs and brain after SCI. METHODS Young adult age-matched male and female C57BL/6 mice were subjected to SCI. At 19 months post-injury, total plasma EVs were isolated by ultracentrifugation and characterized by nanoparticle tracking analysis (NTA). EVs miR cargo was examined using the Fireplex® assay. The transcriptional changes in the brain were assessed by a NanoString nCounter Neuropathology panel and validated by Western blot (WB) and flow cytometry (FC). A battery of behavioral tests was performed for assessment of neurological function. RESULTS Transcriptomic changes showed a high number of changes between sham and those with SCI. Sex-specific changes were found in transcription networks related to disease association, activated microglia, and vesicle trafficking. FC showed higher microglia and myeloid counts in the injured tissue of SCI/Female compared to their male counterparts, along with higher microglial production of ROS in both injured site and the brain. In the latter, increased levels of TNF and mitochondrial membrane potential were seen in microglia from SCI/Female. WB and NTA revealed that EV markers are elevated in the plasma of SCI/Male. Particle concentration in the cortex increased after injury, with SCI/Female showing higher counts than SCI/Male. EVs cargo analysis revealed changes in miR content related to injury and sex. Behavioral testing confirmed impairment of cognition and depression at chronic time points after SCI in both sexes, without significant differences between males and females. CONCLUSIONS Our study is the first to show sexually dimorphic changes in brain after very long-term SCI and supports a potential sex-dependent EV-mediated mechanism that contributes to SCI-induced brain changes.
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Affiliation(s)
- Yun Li
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, 685 W. Baltimore Street, MSTF, Room 6-034D, Baltimore, MD, 21201, USA
| | - Niaz Khan
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, 685 W. Baltimore Street, MSTF, Room 6-034D, Baltimore, MD, 21201, USA
| | - Rodney M Ritzel
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, 685 W. Baltimore Street, MSTF, Room 6-034D, Baltimore, MD, 21201, USA
| | - Zhuofan Lei
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, 685 W. Baltimore Street, MSTF, Room 6-034D, Baltimore, MD, 21201, USA
| | - Samantha Allen
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, 685 W. Baltimore Street, MSTF, Room 6-034D, Baltimore, MD, 21201, USA
| | - Alan I Faden
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, 685 W. Baltimore Street, MSTF, Room 6-034D, Baltimore, MD, 21201, USA
| | - Junfang Wu
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, 685 W. Baltimore Street, MSTF, Room 6-034D, Baltimore, MD, 21201, USA.
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Xue FM, Liu C, Lei Z, An C. [A case of haploinsufficiency of A20 caused by new variation of TNFAIP3 gene]. Zhonghua Er Ke Za Zhi 2023; 61:740-742. [PMID: 37528019 DOI: 10.3760/cma.j.cn112140-20230202-00072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Affiliation(s)
- F M Xue
- Department of Gastroenterology, Children's Hospital Affiliated to Zhengzhou University,Zhenzhou 450018, China
| | - C Liu
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Z Lei
- Henan Key Laboratory of Children's Genetics and Metabolic Diseases, Children's Hospital Affiliated to Zhengzhou University,Zhenzhou 450018, China
| | - C An
- Department of Clinical Laboratory, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
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Yao YL, He SK, Lei Z, Ye T, Xie Y, Deng ZG, Cui B, Qi W, Yang L, Zhu SP, He XT, Zhou WM, Qiao B. High-Flux Neutron Generator Based on Laser-Driven Collisionless Shock Acceleration. Phys Rev Lett 2023; 131:025101. [PMID: 37505952 DOI: 10.1103/physrevlett.131.025101] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 10/20/2022] [Accepted: 05/24/2023] [Indexed: 07/30/2023]
Abstract
A novel compact high-flux neutron generator with a pitcher-catcher configuration based on laser-driven collisionless shock acceleration (CSA) is proposed and experimentally verified. Different from those that previously relied on target normal sheath acceleration (TNSA), CSA in nature favors not only acceleration of deuterons (instead of hydrogen contaminants) but also increasing of the number of deuterons in the high-energy range, therefore having great advantages for production of high-flux neutron source. The proof-of-principle experiment has observed a typical CSA plateau feature from 2 to 6 MeV in deuteron energy spectrum and measured a forward neutron flux with yield 6.6×10^{7} n/sr from the LiF catcher target, an order of magnitude higher than the compared TNSA case, where the laser intensity is 10^{19} W/cm^{2}. Self-consistent simulations have reproduced the experimental results and predicted that a high-flux forward neutron source with yield up to 5×10^{10} n/sr can be obtained when laser intensity increases to 10^{21} W/cm^{2} under the same laser energy.
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Affiliation(s)
- Y L Yao
- Center for Applied Physics and Technology, HEDPS and State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - S K He
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics (CAEP), Mianyang 621900, China
| | - Z Lei
- Center for Applied Physics and Technology, HEDPS and State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - T Ye
- Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
| | - Y Xie
- Center for Applied Physics and Technology, HEDPS and State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Z G Deng
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics (CAEP), Mianyang 621900, China
| | - B Cui
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics (CAEP), Mianyang 621900, China
| | - W Qi
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics (CAEP), Mianyang 621900, China
| | - L Yang
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics (CAEP), Mianyang 621900, China
| | - S P Zhu
- Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
| | - X T He
- Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
| | - W M Zhou
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics (CAEP), Mianyang 621900, China
| | - B Qiao
- Center for Applied Physics and Technology, HEDPS and State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Frontiers Science Center for Nano-optoelectronic, Peking University, Beijing 100094, China
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Lei Z, Krishnamachary B, Ritzel RM, Khan NZ, Li Y, Li H, Brunner K, Faden AI, Wu J. Age-related changes in plasma extracellular vesicles influence neuroinflammation in the brain and neurological outcome after traumatic spinal cord injury. Res Sq 2023:rs.3.rs-2821858. [PMID: 37131758 PMCID: PMC10153385 DOI: 10.21203/rs.3.rs-2821858/v1] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Approximately 20% of all spinal cord injuries (SCI) occur in persons aged 65 years or older. Longitudinal, population-based studies showed that SCI is a risk factor for dementia. However, little research has addressed the potential mechanisms of SCI-mediated neurological impairment in the elderly. We compared young adult and aged C57BL/6 male mice subjected to contusion SCI, using a battery of neurobehavioral tests. Locomotor function showed greater impairment in aged mice, which was correlated with reduced, spared spinal cord white matter and increased lesion volume. At 2 months post-injury, aged mice displayed worse performance in cognitive and depressive-like behavioral tests. Transcriptomic analysis identified activated microglia and dysregulated autophagy as the most significantly altered pathways by both age and injury. Flow cytometry demonstrated increased myeloid and lymphocyte infiltration at both the injury site and brain of aged mice. SCI in aged mice was associated with altered microglial function and dysregulated autophagy involving both microglia and brain neurons. Altered plasma extracellular vesicles (EVs) responses were found in aged mice after acute SCI. EV-microRNA cargos were also significantly altered by aging and injury, which were associated with neuroinflammation and autophagy dysfunction. In cultured microglia, astrocytes, and neurons, plasma EVs from aged SCI mice, at a lower concentration comparable to those of young adult SCI mice, induced the secretion of pro-inflammatory cytokines CXCL2 and IL-6, and increased caspase3 expression. Together, these findings suggest that age alters the EVs pro-inflammatory response to SCI, potentially contributing to worse neuropathological and functional outcomes.
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Affiliation(s)
- Zhuofan Lei
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Balaji Krishnamachary
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Rodney M. Ritzel
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Niaz Z. Khan
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Yun Li
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Hui Li
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Kavitha Brunner
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Alan I. Faden
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Junfang Wu
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
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Ritzel RM, Li Y, Jiao Y, Lei Z, Doran SJ, He J, Shahror RA, Henry RJ, Khan R, Tan C, Liu S, Stoica BA, Faden AI, Szeto G, Loane DJ, Wu J. Brain injury accelerates the onset of a reversible age-related microglial phenotype associated with inflammatory neurodegeneration. Sci Adv 2023; 9:eadd1101. [PMID: 36888713 PMCID: PMC9995070 DOI: 10.1126/sciadv.add1101] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 02/02/2023] [Indexed: 06/18/2023]
Abstract
Lipofuscin is an autofluorescent (AF) pigment formed by lipids and misfolded proteins, which accumulates in postmitotic cells with advanced age. Here, we immunophenotyped microglia in the brain of old C57BL/6 mice (>18 months old) and demonstrate that in comparison to young mice, one-third of old microglia are AF, characterized by profound changes in lipid and iron content, phagocytic activity, and oxidative stress. Pharmacological depletion of microglia in old mice eliminated the AF microglia following repopulation and reversed microglial dysfunction. Age-related neurological deficits and neurodegeneration after traumatic brain injury (TBI) were attenuated in old mice lacking AF microglia. Furthermore, increased phagocytic activity, lysosomal burden, and lipid accumulation in microglia persisted for up to 1 year after TBI, were modified by APOE4 genotype, and chronically driven by phagocyte-mediated oxidative stress. Thus, AF may reflect a pathological state in aging microglia associated with increased phagocytosis of neurons and myelin and inflammatory neurodegeneration that can be further accelerated by TBI.
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Affiliation(s)
- Rodney M. Ritzel
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Yun Li
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Yun Jiao
- Department of Chemical, Biochemical, and Environmental Engineering, University of Maryland, Baltimore, MD 21250, USA
| | - Zhuofan Lei
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Sarah J. Doran
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Junyun He
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Rami A. Shahror
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Rebecca J. Henry
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Romeesa Khan
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77370, USA
| | - Chunfeng Tan
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77370, USA
| | - Shaolin Liu
- Department of Anatomy, Howard University, Washington, DC 20059, USA
| | - Bogdan A. Stoica
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Alan I. Faden
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- University of Maryland Center to Advance Chronic Pain Research, University of Maryland, Baltimore, MD 21201, USA
| | - Gregory Szeto
- Department of Chemical, Biochemical, and Environmental Engineering, University of Maryland, Baltimore, MD 21250, USA
- Allen Institute for Immunology and Department of Pediatrics, University of Washington, Seattle, WA 98109, USA
| | - David J. Loane
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College, Dublin, Ireland
| | - Junfang Wu
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- University of Maryland Center to Advance Chronic Pain Research, University of Maryland, Baltimore, MD 21201, USA
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Li Y, Lei Z, Ritzel RM, He J, Li H, Choi HMC, Lipinski MM, Wu J. Impairment of autophagy after spinal cord injury potentiates neuroinflammation and motor function deficit in mice. Am J Cancer Res 2022; 12:5364-5388. [PMID: 35910787 PMCID: PMC9330534 DOI: 10.7150/thno.72713] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [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: 03/08/2022] [Accepted: 06/24/2022] [Indexed: 01/25/2023] Open
Abstract
Autophagy is a catabolic process that degrades cytoplasmic constituents and organelles in the lysosome, thus serving an important role in cellular homeostasis and protection against insults. We previously reported that defects in autophagy contribute to neuronal cell damage in traumatic spinal cord injury (SCI). Recent data from other inflammatory models implicate autophagy in regulation of immune and inflammatory responses, with low levels of autophagic flux associated with pro-inflammatory phenotypes. In the present study, we examined the effects of genetically or pharmacologically manipulating autophagy on posttraumatic neuroinflammation and motor function after SCI in mice. Methods: Young adult male C57BL/6, CX3CR1-GFP, autophagy hypomorph Becn1+/- mice, and their wildtype (WT) littermates were subjected to moderate thoracic spinal cord contusion. Neuroinflammation and autophagic flux in the injured spinal cord were assessed using flow cytometry, immunohistochemistry, and NanoString gene expression analysis. Motor function was evaluated with the Basso Mouse Scale and horizontal ladder test. Lesion volume and spared white matter were evaluated by unbiased stereology. To stimulate autophagy, disaccharide trehalose, or sucrose control, was administered in the drinking water immediately after injury and for up to 6 weeks after SCI. Results: Flow cytometry demonstrated dysregulation of autophagic function in both microglia and infiltrating myeloid cells from the injured spinal cord at 3 days post-injury. Transgenic CX3CR1-GFP mice revealed increased autophagosome formation and inhibition of autophagic flux specifically in activated microglia/macrophages. NanoString analysis using the neuroinflammation panel demonstrated increased expression of proinflammatory genes and decreased expression of genes related to neuroprotection in Becn1+/- mice as compared to WT controls at 3 days post-SCI. These findings were further validated by qPCR, wherein we observed significantly higher expression of proinflammatory cytokines. Western blot analysis confirmed higher protein expression of the microglia/macrophage marker IBA-1, inflammasome marker, NLRP3, and innate immune response markers cGAS and STING in Becn1+/- mice at 3 day after SCI. Flow cytometry demonstrated that autophagy deficit did not affect either microglial or myeloid counts at 3 days post-injury, instead resulting in increased microglial production of proinflammatory cytokines. Finally, locomotor function showed significantly worse impairments in Becn1+/- mice up to 6 weeks after SCI, which was accompanied by worsening tissue damage. Conversely, treatment with a naturally occurring autophagy inducer trehalose, reduced protein levels of p62, an adaptor protein targeting cargo to autophagosomes as well as the NLRP3, STING, and IBA-1 at 3 days post-injury. Six weeks of trehalose treatment after SCI led to improved motor function recovery as compared to control group, which was accompanied by reduced tissue damage. Conclusions: Our data indicate that inhibition of autophagy after SCI potentiates pro-inflammatory activation in microglia and is associated with worse functional outcomes. Conversely, increasing autophagy with trehalose, decreased inflammation and improved outcomes. These findings highlight the importance of autophagy in spinal cord microglia and its role in secondary injury after SCI.
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Affiliation(s)
| | | | | | | | | | | | - Marta M. Lipinski
- ✉ Corresponding authors: Junfang Wu, MD, PhD, and Marta M. Lipinski, PhD, Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, 685 W. Baltimore Street, MSTF, Room 6-34, Baltimore, MD, 21201 USA. ;
| | - Junfang Wu
- ✉ Corresponding authors: Junfang Wu, MD, PhD, and Marta M. Lipinski, PhD, Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, 685 W. Baltimore Street, MSTF, Room 6-34, Baltimore, MD, 21201 USA. ;
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10
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Chirico N, Kessler EL, Maas RGC, Fang J, Qin J, Dokter I, Ciccone S, Saric T, Buikema JW, Lei Z, Doevendans P, Sluijter JPG, Van Mil A. Small molecule-mediated rapid maturation of human induced pluripotent stem cell derived cardiomyocytes. Cardiovasc Res 2022. [DOI: 10.1093/cvr/cvac066.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Other. Main funding source(s): Gravitation Program “Materials Driven Regeneration” by the Netherlands Organization for Scientific Research (RegmedXB #024.003.013) and the Marie Skłodowska-Curie Actions (Grant agreement RESCUE #801540). The EU-funded project BRAV3 (H2020, ID:874827)
Background
Human-induced pluripotent stem cell (iPSC)-derived cardiomyocytes (iPSC-CMs) do not display all hallmarks of mature human primary cardiomyocytes: the ability to use fatty acids as an energy source, high mitochondrial mass, increased nuclei polyploidism, synchronized electrical conduction, and forceful contractions. Instead, their phenotype is similar to immature cardiomyocytes in the late fetal stage. This immaturity represents a bottleneck to their application in 1) disease modeling – as most cardiac (genetic) diseases have a middle-age onset – and 2) clinical use, where integration and functional coupling are key. So far, the mainly used methods to enhance iPSC-CM maturation include prolonged time-in-culture, 3D culture, cyclic mechanical stretch, and electrical stimulation with specialized media. However, these protocols are laborious, costly, and not easily scalable.
Methods
In this study, we developed a simple, low cost, and rapid protocol using two peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PPARGC1A/PGC-1α) activating small molecules: Asiatic Acid (AA) and GW501516 (GW) to promote cardiomyocyte maturity by inducing a metabolic switch to fatty acid utilization and increased mitochondrial biogenesis.
Results
Monolayers of iPSC-CMs were incubated with AA and GW every other day for 10 days resulting in increased expression of fatty acid-metabolism-related genes (5 and 10-fold increase in CPT1B gene expression, respectively), mitochondria biogenesis (protein expression of ATP5A) and fusion (50 and 100-fold increase in OPA1 gene expression, respectively). In addition, AA treated iPSC-CMs responded in the seahorse mitochondria stress test more rapidly to an artificial increase in mitochondrial activity and showed a higher flexibility in substrate utilization in the seahorse stress test. A more mature electrophysiological functionality was shown by increased ion channel gene expression (KCNA4, SCN5A, GJA1, CACNA1C, and SCN1B) and enhanced synchronous contraction in treated samples. Moreover, maturation was further shown by increased sarcomeric gene expression (5 and 7-fold increase in TNNI3 in AA and GW respectively) and nuclear polyploidism (>4N fold 2.16 and 1.48-fold increase in AA and GW respectively).
Conclusions
Collectively, these findings show that AA and GW trigger a metabolic switch and induce extensive maturation of iPSC-CMs, providing a rapid and cost-effective method to obtain iPSC-CMs that more closely resemble their adult counterparts.
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Affiliation(s)
- N Chirico
- University Medical Center Utrecht , Utrecht , Netherlands (The)
| | - E L Kessler
- University Medical Center Utrecht , Utrecht , Netherlands (The)
| | - RGC Maas
- University Medical Center Utrecht , Utrecht , Netherlands (The)
| | - J Fang
- University Medical Center Utrecht , Utrecht , Netherlands (The)
| | - J Qin
- University Medical Center Utrecht , Utrecht , Netherlands (The)
| | - I Dokter
- University Medical Center Utrecht , Utrecht , Netherlands (The)
| | - S Ciccone
- University Medical Center Utrecht , Utrecht , Netherlands (The)
| | - T Saric
- University of Cologne, Center for Physiology and Pathophysiology, Institute for Neurophysiology , Cologne , Germany
| | - JW Buikema
- University Medical Center Utrecht , Utrecht , Netherlands (The)
| | - Z Lei
- University Medical Center Utrecht , Utrecht , Netherlands (The)
| | - P Doevendans
- University Medical Center Utrecht , Utrecht , Netherlands (The)
| | - JPG Sluijter
- University Medical Center Utrecht , Utrecht , Netherlands (The)
| | - A Van Mil
- University Medical Center Utrecht , Utrecht , Netherlands (The)
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11
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Fang J, Van Der Geest JSA, Yao B, Yang Q, Chirico N, Brans MA, Roefs MT, Vader P, De Jager SCA, De Bruin A, Vink A, Van Mil A, Schiffelers RM, Lei Z, Sluijter JPG. E2F7/8 is involved in cardiomyocyte polyploidy but does not affect myocardial reperfusion injury recovery. Cardiovasc Res 2022. [DOI: 10.1093/cvr/cvac066.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Other. Main funding source(s): CSC fellowship
Background
Polyploidy cells consist of more than two complete sets of homologous chromosomes. Although a characteristic feature of cardiomyocytes and observed in all mammalian species, its molecular mechanism and biological functions are still unknown. Cardiomyocytes polyploidy in rodents occurs mainly through incomplete cytokinesis and increases with age. Studies have demonstrated that E2F7/8 transcription factors are key regulators of polyploidy in the liver and pancreas, however, it remains unclear if E2F7/8 control the generation of polyploidy cardiomyocytes and what the functional consequence is post-myocardial infarction (MI).
Methods
By using a tamoxifen inducible Cre/LoxP approach in new-born mice, we deleted E2F7/8 transcription factors ubiquitously and evaluated the biological significance of postnatal E2F7/8 loss. Mice underwent myocardial ischemia reperfusion injury (IRI) and heart function was assessed by 4D-echocardiography. Cardiomyocyte nucleus polyploidy was measured by FACS and microscope.
Results
Deficiency of E2F7/8 significantly suppress cardiomyocyte mononucleated and multinucleated polyploidy, as well as dramatically decreased hepatocytes polyploidy. E2F7/8 defect also led to a decrease in cardiac stress related marker lever such as ANP, BNP, MMP2, β-MHC/α-MHC and an increase in CD31 expression level. Surprisingly, E2F7/8 deletion did not have impact on cardiac function and dimensions post-IRI.
Conclusion
In summary, we identified that E2F7/8 activity is involved in the cellular polyploidy in the heart but did not affect myocardial function after myocardial injury.
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Affiliation(s)
- J Fang
- University Medical Center Utrecht, Experimental Cardiology , Utrecht , Netherlands (The)
| | - JSA Van Der Geest
- University Medical Center Utrecht, Experimental Cardiology , Utrecht , Netherlands (The)
| | - B Yao
- University Medical Center Utrecht, Experimental Cardiology , Utrecht , Netherlands (The)
| | - Q Yang
- University Medical Center Utrecht, CDL Research , Utrecht , Netherlands (The)
| | - N Chirico
- University Medical Center Utrecht, Experimental Cardiology , Utrecht , Netherlands (The)
| | - MA Brans
- University Medical Center Utrecht, Experimental Cardiology , Utrecht , Netherlands (The)
| | - MT Roefs
- University Medical Center Utrecht, Experimental Cardiology , Utrecht , Netherlands (The)
| | - P Vader
- University Medical Center Utrecht, Experimental Cardiology and CDL Research , Utrecht , Netherlands (The)
| | - SCA De Jager
- University Medical Center Utrecht, Experimental Cardiology , Utrecht , Netherlands (The)
| | - A De Bruin
- University of Groningen, Department of Pediatrics , Groningen , Netherlands (The)
| | - A Vink
- University Medical Center Utrecht, Department of Pathology , Utrecht , Netherlands (The)
| | - A Van Mil
- University Medical Center Utrecht, Experimental Cardiology , Utrecht , Netherlands (The)
| | - RM Schiffelers
- University Medical Center Utrecht, CDL Research , Utrecht , Netherlands (The)
| | - Z Lei
- University Medical Center Utrecht, Experimental Cardiology and CDL Research , Utrecht , Netherlands (The)
| | - JPG Sluijter
- University Medical Center Utrecht, Experimental Cardiology , Utrecht , Netherlands (The)
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12
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Van Der Geest JSA, Lei Z, Doevendans PAFM, Sluijter JPG. Myocardial tissue slices for modeling of the human PLN p.Arg14del associated cardiomyopathy. Cardiovasc Res 2022. [DOI: 10.1093/cvr/cvac066.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): NWO - The Dutch Research Council
Background
Current in vivo preclinical models lack the predictability of the clinical efficacy resulting in a high dropout rate of therapeutic candidates. Advanced human-based models are required to bridge this gap and indicate the potential of novel therapeutic approaches[1]. Myocardial tissue slices are an in vitro model that recapitulates the native multicellular architecture of the heart. This allows for modeling cellular processes in a macroscopic context entailing great promise. The most common cardiomyopathy-related mutation in the Netherlands is the loss of arginine at position 14 (p.Arg14del) in the phospholamban protein (PLN). PLN is a critical regulator of calcium cycling and contractility in the heart. The p.Arg14del mutation results in a super inhibition of SERCA2a and thus aberrant calcium handling and reduced contractile force. Mice models harbouring the PLN p.Arg14del do not completely recapitulate the human manifestation mainly due to the difference between species; heart rate, Calcium-cycling and ion properties, and different myosin heavy chain isoforms, showing the unmet need for a human-based model[2,3].
Methods & Results
300 µm thick viable myocardial tissue were sectioned from a PLN p.Arg14del patient’s left ventricle. Although the myocardial tissue slices were kept alive for eight days in static culture, these conditions initiated cell death and dedifferentiation. The tissue slices show the greatest resemblance to the intact architecture of the in vivo human heart, it is the most relevant model for viral transduction in the human heart, and proof-of-principle of this is performed. Myocardial tissue slices of a PLN p.Arg14del patient retain the structural phenotype shown by the fibrofatty deposition. Similarly, functional patient characteristics, aberrant calcium handling, and reduced contractile force are preserved.
Conclusion
Myocardial tissue slices recapitulate the (patho)physiology of the heart, as shown here with the PLN p.Arg14del case. However, the static culture conditions induce remodeling of the heart and thus only allow for acute measures in the native heart. To prolong the period that the slices recapitulate the native heart, culture conditions should mimic the environment of the heart. The tissue slices allow for a currently unmet need to modulate the complex architecture of the human heart with e.g. novel delivery tools or therapeutic interventions. All in all, myocardial tissue slices are a promising model that can give novel insights into the physiology of the human heart, and therapeutic intervention on induced or genetic cardiomyopathies.
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Affiliation(s)
- JSA Van Der Geest
- University Medical Center Utrecht, Experimental Cardiology , Utrecht , Netherlands (The)
| | - Z Lei
- University Medical Center Utrecht, CDL Research , Utrecht , Netherlands (The)
| | - PAFM Doevendans
- University Medical Center Utrecht, Experimental Cardiology , Utrecht , Netherlands (The)
| | - JPG Sluijter
- University Medical Center Utrecht, Experimental Cardiology , Utrecht , Netherlands (The)
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13
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Xia K, Wang F, Lai X, Luo P, Chen H, Ma Y, Huang W, Ou W, Li Y, Feng X, Lei Z, Tu X, Ke Q, Mao F, Deng C, Xiang A. Gene Editing/Gene Therapies: AAV-MEDIATED GENE THERAPY PRODUCES FERTILE OFFSPRING IN THE LHCGR-DEFICIENT MOUSE MODEL OF LEYDIG CELL FAILURE. Cytotherapy 2022. [DOI: 10.1016/s1465-3249(22)00156-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Ritzel RM, Li Y, Lei Z, Carter J, He J, Choi HMC, Khan N, Li H, Allen S, Lipinski MM, Faden AI, Wu J. Functional and transcriptional profiling of microglial activation during the chronic phase of TBI identifies an age-related driver of poor outcome in old mice. GeroScience 2022; 44:1407-1440. [PMID: 35451674 PMCID: PMC9213636 DOI: 10.1007/s11357-022-00562-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 12/20/2021] [Accepted: 04/01/2022] [Indexed: 12/14/2022] Open
Abstract
Elderly patients with traumatic brain injury (TBI) have greater mortality and poorer outcomes than younger individuals. The extent to which old age alters long-term recovery and chronic microglial activation after TBI is unknown, and evidence for therapeutic efficacy in aged mice is sorely lacking. The present study sought to identify potential inflammatory mechanisms underlying age-related outcomes late after TBI. Controlled cortical impact was used to induce moderate TBI in young and old male C57BL/6 mice. At 12 weeks post-injury, aged mice exhibited higher mortality, poorer functional outcomes, larger lesion volumes, and increased microglial activation. Transcriptomic analysis identified age- and TBI-specific gene changes consistent with a disease-associated microglial signature in the chronically injured brain, including those involved with complement, phagocytosis, and autophagy pathways. Dysregulation of phagocytic and autophagic function in microglia was accompanied by increased neuroinflammation in old mice. As proof-of-principle that these pathways have functional importance, we administered an autophagic enhancer, trehalose, in drinking water continuously for 8 weeks after TBI. Old mice treated with trehalose showed enhanced functional recovery and reduced microglial activation late after TBI compared to the sucrose control group. Our data indicate that microglia undergo chronic changes in autophagic regulation with both normal aging and TBI that are associated with poorer functional outcome. Enhancing autophagy may therefore be a promising clinical therapeutic strategy for TBI, especially in older patients.
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Affiliation(s)
- Rodney M. Ritzel
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, Baltimore, MD 21201 USA
| | - Yun Li
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, Baltimore, MD 21201 USA
| | - Zhuofan Lei
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, Baltimore, MD 21201 USA
| | - Jordan Carter
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, Baltimore, MD 21201 USA
| | - Junyun He
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, Baltimore, MD 21201 USA
| | - Harry M. C. Choi
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, Baltimore, MD 21201 USA
| | - Niaz Khan
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, Baltimore, MD 21201 USA
| | - Hui Li
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, Baltimore, MD 21201 USA
| | - Samantha Allen
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, Baltimore, MD 21201 USA
| | - Marta M. Lipinski
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, Baltimore, MD 21201 USA
| | - Alan I. Faden
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, Baltimore, MD 21201 USA
| | - Junfang Wu
- Department of Anesthesiology and Shock, Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, Baltimore, MD 21201 USA
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15
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Li Y, Ritzel RM, Lei Z, Cao T, He J, Faden AI, Wu J. Sexual dimorphism in neurological function after SCI is associated with disrupted neuroinflammation in both injured spinal cord and brain. Brain Behav Immun 2022; 101:1-22. [PMID: 34954073 PMCID: PMC8885910 DOI: 10.1016/j.bbi.2021.12.017] [Citation(s) in RCA: 4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 11/29/2021] [Accepted: 12/18/2021] [Indexed: 10/19/2022] Open
Abstract
Whereas human spinal cord injury (SCI) is more common in men, the prevalence is growing in women. However, little is known about the effect of biological sex on brain dysfunction and injury mechanisms. To model the highest per capita rate of injury (ages between 16 and 30 years old) in humans, in the present study, young adult or a young/middle-aged male and female C57BL/6 mice were subjected to moderate contusion SCI. When mice were injured at 10-12-week-old, transcriptomic analysis of inflammation-related genes and flow cytometry revealed a more aggressive neuroinflammatory profile in male than females following 3 d SCI, ostensibly driven by sex-specific changes myeloid cell function rather than cell number. Female mice were generally more active at baseline, as evidenced by greater distance traveled in the open field. After SCI, female mice had more favorable locomotor function than male animals. At 13 weeks post-injury, male mice showed poor performance in cognitive and depressive-like behavioral tests, while injured female mice showed fewer deficits in these tasks. However, when injured at 6 months old followed by 8 months post-injury, male mice had considerably less inflammatory activation compared with female animals despite having similar or worse outcomes in affective, cognitive, and motor tasks. Collectively, these findings indicate that sex differences in functional outcome after SCI are associated with the age at onset of injury, as well as disrupted neuroinflammation not only at the site of injury but also in remote brain regions. Thus, biological sex should be considered when designing new therapeutic agents.
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Affiliation(s)
- Yun Li
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Rodney M. Ritzel
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Zhuofan Lei
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Tuoxin Cao
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Junyun He
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA
| | - Alan I Faden
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD, 21201 USA,University of Maryland Center to Advance Chronic Pain Research, University of Maryland, Baltimore, MD, 21201 USA
| | - Junfang Wu
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA; University of Maryland Center to Advance Chronic Pain Research, University of Maryland, Baltimore, MD 21201, USA.
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16
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Yan W, Feng Y, Lei Z, Kuang W, Long C. MicroRNA-214-3p Ameliorates LPS-Induced Cardiomyocyte Injury by Inhibiting Cathepsin B. Folia Biol (Praha) 2022; 68:78-85. [PMID: 36384265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Myocardial injury is a common complication of sepsis. MicroRNA (miRNA) miR-214-3p is protective against myocardial injury caused by sepsis, but its mechanism in lipopolysaccharide (LPS)- induced cardiomyocyte injury is still unclear. An AC16 cell injury model was induced by LPS treatment. Cell Counting Kit-8 and flow cytometry assay showed decreased cell viability and increased apoptosis in LPS-treated AC16 cells. The levels of caspase- 3, Bax, atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP), myosin 6 (Myh6), myosin 7 (Myh7), reactive oxygen species (ROS), and malondialdehyde (MDA) were increased in LPS-treated AC16 cells, but the levels of Bcl-2 and superoxide dismutase (SOD) were decreased. MiR-214-3p was down-regulated and cathepsin B (CTSB) was upregulated in LPS-treated AC16 cells. At the same time, miR-214-3p could target CTSB and reduce its expression. We also found that a miR-214-3p mimic or CTSB silencing could significantly reduce LPSinduced apoptosis, decrease ROS, MDA, caspase-3, and Bax and increase SOD and Bcl-2. CTSB silencing could significantly reduce ANP, BNP, Myh6, and Myh7 in LPS-treated AC16 cells. The effects of CTSB silencing were reversed by a miR-214-3p inhibitor. In summary, miR-214-3p could inhibit LPSinduced myocardial injury by targeting CTSB, which provides a new idea for myocardial damage caused by sepsis.
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Affiliation(s)
- W Yan
- The First Affiliated Hospital, Department of Cardiovascular Surgery, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Y Feng
- The First Affiliated Hospital, Department of Cardiovascular Surgery, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - Z Lei
- The First Affiliated Hospital, Department of Cardiovascular Surgery, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - W Kuang
- The First Affiliated Hospital, Department of Cardiovascular Surgery, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
| | - C Long
- The First Affiliated Hospital, Department of Cardiovascular Surgery, Hengyang Medical School, University of South China, Hengyang, Hunan, 421001, China
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17
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Zhao ZH, Xie Y, Lei Z, Jiao JL, Zhou WM, Zhou CT, Zhu SP, He XT, Qiao B. Onset of inverse magnetic energy transfer in collisionless turbulent plasmas. Phys Rev E 2021; 104:025204. [PMID: 34525564 DOI: 10.1103/physreve.104.025204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 07/28/2021] [Indexed: 11/07/2022]
Abstract
Inverse magnetic energy transfer from small to large scales is a key physical process for the origin of large-scale strong magnetic fields in the universe. However, so far, from the magnetohydrodynamic perspective, the onset of inverse transfer is still not fully understood, especially the underlying dynamics. Here, we use both two-dimensional and three-dimensional particle-in-cell simulations to show the self-consistent dynamics of inverse transfer in collisionless decaying turbulent plasmas. Using the space filtering technique in theory and numerical analyses, we identify magnetic reconnection as the onset and fundamental drive for inverse transfer, where, specifically, the subscale electromotive force driven by magnetic reconnection do work on the large-scale magnetic field, resulting in energy transfer from small to large scales. The mechanism is also verified by the strong correlations in locations and characteristic scales between inverse transfer and magnetic reconnection.
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Affiliation(s)
- Z H Zhao
- Center for Applied Physics and Technology, HEDPS, and SKLNPT, School of Physics, Peking University, Beijing 100871, China
| | - Y Xie
- Center for Applied Physics and Technology, HEDPS, and SKLNPT, School of Physics, Peking University, Beijing 100871, China
| | - Z Lei
- Center for Applied Physics and Technology, HEDPS, and SKLNPT, School of Physics, Peking University, Beijing 100871, China
| | - J L Jiao
- Center for Applied Physics and Technology, HEDPS, and SKLNPT, School of Physics, Peking University, Beijing 100871, China
| | - W M Zhou
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - C T Zhou
- Center for Advanced Material Diagnostic Technology, Shenzhen Technology University, Shenzhen 518118, China
| | - S P Zhu
- Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
| | - X T He
- Center for Applied Physics and Technology, HEDPS, and SKLNPT, School of Physics, Peking University, Beijing 100871, China.,Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
| | - B Qiao
- Center for Applied Physics and Technology, HEDPS, and SKLNPT, School of Physics, Peking University, Beijing 100871, China
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18
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Li T, Qian D, Guoyan J, Lei Z. Downregulated long noncoding RNA LUCAT1 inhibited proliferation and promoted apoptosis of cardiomyocyte via miR-612/HOXA13 pathway in chronic heart failure. Eur Rev Med Pharmacol Sci 2021; 24:385-395. [PMID: 31957853 DOI: 10.26355/eurrev_202001_19937] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Long non-coding RNAs (lncRNAs) have been reported to play important roles in numerous kinds of cardiovascular disease, including chronic heart failure (CHF). In this study, we mainly focused on investigating the potential roles of lncRNA LUCAT1 patients with CHF. PATIENTS AND METHODS RT-PCR was used to detect the expressions of LUCAT1 and miR-612 in serum samples of CHF patients (n=60) and healthy volunteers. Relationships between the expressions of LUCAT1 and miR-612, LUCAT1 and overall survival (OS) were analyzed using the Kaplan-Meier method. Si-LUCAT1 and miR-612 mimic were constructed and respectively transfected into AC16 cells to explore the functions of LUCAT1 and miR-612. Cell proliferation abilities were detected by CCK-8 assay AC16 cells. Cell apoptotic rates were measured by flow cytometry (FACS) analysis. Western blot (WB) was performed to detect the protein levels of HOXA13, Bcl-2, Bax, Bad and Cleaved Caspase3. In addition, luciferase gene reporter assay was used to prove the relationships between LUCAT1 and miR-612, miR-612 and HOXA13. RESULTS Firstly, we found that LUCAT1 was decreased for 1.7 folds in CHF patients, which was correlated with poor prognosis patients. LUCAT1 repression inhibited cell proliferation and promoted cell apoptosis in human cardiomyocyte cell line AC16 cells. Furthermore, we found that miR-612 was increased for 2.0 folds in CHF patients, which was negatively interacted with LUCAT1 expression. Luciferase gene reporter assay demonstrated that LUCAT1 could directly bind with miR-612 in AC16 cells. Moreover, miR-612 overexpression also inhibited cell proliferation and promoted cell apoptosis in AC16 cells. Luciferase reporter assay indicated that miR-612 could directly target at HOXA13 in AC16 cells, which was associated with cell proliferation and apoptosis. Finally, miR-612 inhibitor was transfected into AC16 cells with si-LUCAT1. The results showed that the inhibited cell proliferation and promoted cell apoptosis were reversed, which confirmed that LUCAT1 repression inhibited cell proliferation and promoted apoptosis via miR-612/HOXA13 axis in CHF patients. CONCLUSIONS According to the above results, our study revealed that LUCAT1 was decreased in CHF patients, which was correlated with poor prognosis of CHF patients. Furthermore, the downregulation of LUCAT1 inhibited cell proliferation and promoted cell apoptosis via targeting miR-612/HOXA13 axis. Our results elucidated a potential mechanism underlying cardiomyocyte apoptosis, which might be used as a promising prognostic marker and a potential target for CHF patients.
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Affiliation(s)
- T Li
- Department of ICU, The Third Affiliated Hospital of Chongqing Medical University (Gener Hospital), Chongqing, China.
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Pang M, Shi Z, Lei Z, Ge Y, Jiang S, Cao L. Structure and thermal properties of beeswax-based oleogels with different types of vegetable oil. Grasas y Aceites 2020. [DOI: 10.3989/gya.0806192] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Beeswax-based oleogels with different types of vegetable oil, including camellia oil (CO), soybean oil (SO), sunflower oil (SFO), or flaxseed oil (FO), were prepared and their structure and thermal properties were evaluated. The critical concentration of oleogel obtained from each of CO, SO, and SFO at 25 °C was 3% (w/w), and that from FO was 4%. Thermal measurements revealed similar thermodynamic curves for oleogels in different lipid phases. X-Ray diffraction showed orthorhombic perpendicular subcell packing and characteristic peaks of the β’ form. Furthermore, a morphology analysis of the crystals showed that they were needle shaped. Fourier transform-infrared spectra revealed that beeswax-based oleogels were formed via non-covalent bonds and may be stabilized with physical entanglements. The oleogels showed oil type-dependent oxidative abilities, but they were all stable and showed no obvious changes in peroxide value during 90 days of storage at 5 °C.
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20
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Puls B, Ding Y, Zhang F, Pan M, Lei Z, Pei Z, Jiang M, Bai Y, Forsyth C, Metzger M, Rana T, Zhang L, Ding X, Keefe M, Cai A, Redilla A, Lai M, He K, Li H, Chen G. Regeneration of Functional Neurons After Spinal Cord Injury via in situ NeuroD1-Mediated Astrocyte-to-Neuron Conversion. Front Cell Dev Biol 2020; 8:591883. [PMID: 33425896 PMCID: PMC7793709 DOI: 10.3389/fcell.2020.591883] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 11/25/2020] [Indexed: 01/06/2023] Open
Abstract
Spinal cord injury (SCI) often leads to impaired motor and sensory functions, partially because the injury-induced neuronal loss cannot be easily replenished through endogenous mechanisms. In vivo neuronal reprogramming has emerged as a novel technology to regenerate neurons from endogenous glial cells by forced expression of neurogenic transcription factors. We have previously demonstrated successful astrocyte-to-neuron conversion in mouse brains with injury or Alzheimer's disease by overexpressing a single neural transcription factor NeuroD1. Here we demonstrate regeneration of spinal cord neurons from reactive astrocytes after SCI through AAV NeuroD1-based gene therapy. We find that NeuroD1 converts reactive astrocytes into neurons in the dorsal horn of stab-injured spinal cord with high efficiency (~95%). Interestingly, NeuroD1-converted neurons in the dorsal horn mostly acquire glutamatergic neuronal subtype, expressing spinal cord-specific markers such as Tlx3 but not brain-specific markers such as Tbr1, suggesting that the astrocytic lineage and local microenvironment affect the cell fate after conversion. Electrophysiological recordings show that the NeuroD1-converted neurons can functionally mature and integrate into local spinal cord circuitry by displaying repetitive action potentials and spontaneous synaptic responses. We further show that NeuroD1-mediated neuronal conversion can occur in the contusive SCI model with a long delay after injury, allowing future studies to further evaluate this in vivo reprogramming technology for functional recovery after SCI. In conclusion, this study may suggest a paradigm shift from classical axonal regeneration to neuronal regeneration for spinal cord repair, using in vivo astrocyte-to-neuron conversion technology to regenerate functional new neurons in the gray matter.
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Affiliation(s)
- Brendan Puls
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Yan Ding
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Fengyu Zhang
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Mengjie Pan
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Zhuofan Lei
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Zifei Pei
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Mei Jiang
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Yuting Bai
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Cody Forsyth
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Morgan Metzger
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Tanvi Rana
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Lei Zhang
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Xiaoyun Ding
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Matthew Keefe
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Alice Cai
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Austin Redilla
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Michael Lai
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Kevin He
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
| | - Hedong Li
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
- Department of Neuroscience & Regenerative Medicine, Medical College of Georgia at Augusta University, Augusta, GA, United States
| | - Gong Chen
- Department of Biology, Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA, United States
- Guangdong-Hong Kong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, China
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21
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Zhang L, Lei Z, Guo Z, Pei Z, Chen Y, Zhang F, Cai A, Mok G, Lee G, Swaminathan V, Wang F, Bai Y, Chen G. Development of Neuroregenerative Gene Therapy to Reverse Glial Scar Tissue Back to Neuron-Enriched Tissue. Front Cell Neurosci 2020; 14:594170. [PMID: 33250718 PMCID: PMC7674596 DOI: 10.3389/fncel.2020.594170] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 10/02/2020] [Indexed: 01/12/2023] Open
Abstract
Injuries in the central nervous system (CNS) often causes neuronal loss and glial scar formation. We have recently demonstrated NeuroD1-mediated direct conversion of reactive glial cells into functional neurons in adult mouse brains. Here, we further investigate whether such direct glia-to-neuron conversion technology can reverse glial scar back to neural tissue in a severe stab injury model of the mouse cortex. Using an adeno-associated virus (AAV)-based gene therapy approach, we ectopically expressed a single neural transcription factor NeuroD1 in reactive astrocytes in the injured areas. We discovered that the reactive astrocytes were efficiently converted into neurons both before and after glial scar formation, and the remaining astrocytes proliferated to repopulate themselves. The astrocyte-converted neurons were highly functional, capable of firing action potentials and establishing synaptic connections with other neurons. Unexpectedly, the expression of NeuroD1 in reactive astrocytes resulted in a significant reduction of toxic A1 astrocytes, together with a significant decrease of reactive microglia and neuroinflammation. Furthermore, accompanying the regeneration of new neurons and repopulation of new astrocytes, new blood vessels emerged and blood-brain-barrier (BBB) was restored. These results demonstrate an innovative neuroregenerative gene therapy that can directly reverse glial scar back to neural tissue, opening a new avenue for brain repair after injury.
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Affiliation(s)
- Lei Zhang
- Department of Biology, Huck Institute of Life Sciences, Pennsylvania State University, University Park, PA, United States
| | - Zhuofan Lei
- Department of Biology, Huck Institute of Life Sciences, Pennsylvania State University, University Park, PA, United States
| | - Ziyuan Guo
- Department of Biology, Huck Institute of Life Sciences, Pennsylvania State University, University Park, PA, United States
| | - Zifei Pei
- Department of Biology, Huck Institute of Life Sciences, Pennsylvania State University, University Park, PA, United States
| | - Yuchen Chen
- Department of Biology, Huck Institute of Life Sciences, Pennsylvania State University, University Park, PA, United States
| | - Fengyu Zhang
- Department of Biology, Huck Institute of Life Sciences, Pennsylvania State University, University Park, PA, United States
| | - Alice Cai
- Department of Biology, Huck Institute of Life Sciences, Pennsylvania State University, University Park, PA, United States
| | - Gabriel Mok
- Department of Biology, Huck Institute of Life Sciences, Pennsylvania State University, University Park, PA, United States
| | - Grace Lee
- Department of Biology, Huck Institute of Life Sciences, Pennsylvania State University, University Park, PA, United States
| | - Vishal Swaminathan
- Department of Biology, Huck Institute of Life Sciences, Pennsylvania State University, University Park, PA, United States
| | - Fan Wang
- Department of Biology, Huck Institute of Life Sciences, Pennsylvania State University, University Park, PA, United States
| | - Yuting Bai
- Department of Biology, Huck Institute of Life Sciences, Pennsylvania State University, University Park, PA, United States
| | - Gong Chen
- Department of Biology, Huck Institute of Life Sciences, Pennsylvania State University, University Park, PA, United States
- Guangdong-Hongkong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, China
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Li Y, Ritzel RM, Khan N, Cao T, He J, Lei Z, Matyas JJ, Sabirzhanov B, Liu S, Li H, Stoica BA, Loane DJ, Faden AI, Wu J. Delayed microglial depletion after spinal cord injury reduces chronic inflammation and neurodegeneration in the brain and improves neurological recovery in male mice. Am J Cancer Res 2020; 10:11376-11403. [PMID: 33052221 PMCID: PMC7545988 DOI: 10.7150/thno.49199] [Citation(s) in RCA: 75] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 09/02/2020] [Indexed: 12/15/2022] Open
Abstract
Neuropsychological deficits, including impairments in learning and memory, occur after spinal cord injury (SCI). In experimental SCI models, we and others have reported that such changes reflect sustained microglia activation in the brain that is associated with progressive neurodegeneration. In the present study, we examined the effect of pharmacological depletion of microglia on posttraumatic cognition, depressive-like behavior, and brain pathology after SCI in mice. Methods: Young adult male C57BL/6 mice were subjected to moderate/severe thoracic spinal cord contusion. Microglial depletion was induced with the colony-stimulating factor 1 receptor (CSF1R) antagonist PLX5622 administered starting either 3 weeks before injury or one day post-injury and continuing through 6 weeks after SCI. Neuroinflammation in the injured spinal cord and brain was assessed using flow cytometry and NanoString technology. Neurological function was evaluated using a battery of neurobehavioral tests including motor function, cognition, and depression. Lesion volume and neuronal counts were quantified by unbiased stereology. Results: Flow cytometry analysis demonstrated that PLX5622 pre-treatment significantly reduced the number of microglia, as well as infiltrating monocytes and neutrophils, and decreased reactive oxygen species production in these cells from injured spinal cord at 2-days post-injury. Post-injury PLX5622 treatment reduced both CD45int microglia and CD45hi myeloid counts at 7-days. Following six weeks of PLX5622 treatment, there were substantial changes in the spinal cord and brain transcriptomes, including those involved in neuroinflammation. These alterations were associated with improved neuronal survival in the brain and neurological recovery. Conclusion: These findings indicate that pharmacological microglia-deletion reduces neuroinflammation in the injured spinal cord and brain, improving recovery of cognition, depressive-like behavior, and motor function.
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Fritzsche B, Mutschke G, Meinel TJ, Yang X, Lei Z, Eckert K. Oscillatory surface deformation of paramagnetic rare-earth solutions driven by an inhomogeneous magnetic field. Phys Rev E 2020; 101:062601. [PMID: 32688567 DOI: 10.1103/physreve.101.062601] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 05/14/2020] [Indexed: 11/07/2022]
Abstract
The deformation of the free surface of a paramagnetic liquid subjected to a nonuniform magnetic field is studied. A transient deformation of the surface caused by the interplay of gravity, magnetic field, and surface tension is observed when a permanent magnet is moved vertically downward to the free surface of the liquid. Different concentrations of rare-earth-metal salt (DyCl_{3}) are used and different magnet velocities are studied. The deformation of the interface is followed optically by means of a microscope and recorded with a high-speed camera. The experimental results are compared and discussed with complementary numerical simulations. Detailed results are given for the static shape of the deformed surface and the temporal evolution of the surface deformation below the center of the magnet. The frequency of the surface oscillations is found to depend on the concentration of the salt and is compared with analytical findings. Finally, a potential application of the effects observed is presented.
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Affiliation(s)
- B Fritzsche
- Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, 01062 Dresden, Germany
| | - G Mutschke
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzener Landstrasse 400, 01328 Dresden, Germany
| | - T J Meinel
- Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, 01062 Dresden, Germany
| | - X Yang
- Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, 01062 Dresden, Germany.,Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzener Landstrasse 400, 01328 Dresden, Germany
| | - Z Lei
- Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, 01062 Dresden, Germany.,Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzener Landstrasse 400, 01328 Dresden, Germany
| | - K Eckert
- Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, 01062 Dresden, Germany.,Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzener Landstrasse 400, 01328 Dresden, Germany
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24
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Zhang B, Lei Z, Liu ZQ, Zheng YG. Improvement of gibberellin production by a newly isolated Fusarium fujikuroi mutant. J Appl Microbiol 2020; 129:1620-1632. [PMID: 32538506 DOI: 10.1111/jam.14746] [Citation(s) in RCA: 8] [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: 03/10/2020] [Revised: 05/20/2020] [Accepted: 06/08/2020] [Indexed: 12/31/2022]
Abstract
AIMS To obtain and investigate the potential mechanism for GA3 production in Fusarium fujikuroi GA-251, a high GA3 producer. METHODS AND RESULTS Fusarium fujikuroi IMI 58289 was bred with Cobalt-60 (60 Co) radiation and lithium chloride treatment. The best mutant strain GA-251 was obtained for the subsequent optimization of fermentation conditions. The yield of GA3 by GA-251 was 2100 mg l-1 , while the wild-type strain was 100 mg l-1 , which is a 21-fold increase in the yield. To elucidate the mechanism of high GA3 yield of GA-251, the genome was sequenced and compared with wild-type strain IMI 58289. The results showed 2295 single nucleotide polymorphisms, 1242 small indels and 30 structural variants. These mutations were analysed and enriched in the MAPK signalling pathway, the mRNA surveillance pathway and endocytosis. The potential reasons for the improved GA3 biosynthesis were investigated. CONCLUSIONS The potential mechanism of high GA3 yield was attributed to endocytosis pathway and histone modification proteins family. SIGNIFICANCE AND IMPACT OF THE STUDY A mutant strain GA-251 in this work that could potentially be utilized in the industrial yield of GA3 . The comparative genome analysis would shed light onto the mechanism of yield improvement and be a theoretical guide for further metabolic engineering.
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Affiliation(s)
- B Zhang
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China.,Engineering Research Center of Bioconversion and Bio-purification, Ministry of Education, Zhejiang University of Technology, Hangzhou, Zhejiang, China
| | - Z Lei
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China.,Engineering Research Center of Bioconversion and Bio-purification, Ministry of Education, Zhejiang University of Technology, Hangzhou, Zhejiang, China
| | - Z-Q Liu
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China.,Engineering Research Center of Bioconversion and Bio-purification, Ministry of Education, Zhejiang University of Technology, Hangzhou, Zhejiang, China
| | - Y-G Zheng
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China.,Engineering Research Center of Bioconversion and Bio-purification, Ministry of Education, Zhejiang University of Technology, Hangzhou, Zhejiang, China
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25
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Huang M, Marinaro G, Yang X, Fritzsche B, Lei Z, Uhlemann M, Eckert K, Mutschke G. Mass transfer and electrolyte flow during electrodeposition on a conically shaped electrode under the influence of a magnetic field. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.04.043] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Kang X, Wang Y, Liang J, Lei Z. 810 Expression of activity-induced Cytidine Deaminase in melanoma and its correlation with the BRAF mutation and clinicopathological features. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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27
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Dondik Y, Lei Z, Gaskins J, Pagidas K. Minichrosome maintenance complex component 8 and 9 gene expression in the menstrual cycle and unexplained primary ovarian insufficiency. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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28
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Zhang C, Lei Z, Zhang J, Wang Y, Liu Y. Cure behavior and compatibilization of epoxide hyperbranched polyurethane on silica/benzoxazine blend. J Appl Polym Sci 2018. [DOI: 10.1002/app.46879] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- C. Zhang
- Department of Chemical Engineering; School of Chemical Engineering and Technology, Xi'an Jiaotong University; Xi'an 710049 China
| | - Z. Lei
- Department of Chemical Engineering; School of Chemical Engineering and Technology, Xi'an Jiaotong University; Xi'an 710049 China
| | - J. Zhang
- Department of Applied Chemistry; School of Science, Xi'an Jiaotong University; Xi'an 710049 China
| | - Y. Wang
- Department of Chemical Engineering; School of Chemical Engineering and Technology, Xi'an Jiaotong University; Xi'an 710049 China
| | - Y. Liu
- Department of Chemical Engineering; School of Chemical Engineering and Technology, Xi'an Jiaotong University; Xi'an 710049 China
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29
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Mol E, Lei Z, Bakker MH, Vader P, Schiffelers RM, Dankers PYW, Chamuleau SAJ, Doevendans PA, Goumans MJ, Sluijter JP. 202Slow release of cardiac progenitor cell-derived extracellular vesicles from a pH-switchable hydrogel. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy060.152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- E Mol
- University Medical Center Utrecht, Experimental Cardiology, Utrecht, Netherlands
| | - Z Lei
- University Medical Center Utrecht, Experimental Cardiology, Utrecht, Netherlands
| | - M H Bakker
- Eindhoven University of Technology, Institute for Complex Molecular Systems, Eindhoven, Netherlands
| | - P Vader
- University Medical Center Utrecht, Experimental Cardiology and Laboratory of Clinical Chemistry and Haematology, Utrecht, Netherlands
| | - R M Schiffelers
- University Medical Center Utrecht, Laboratory of Clinical Chemistry and Haematology, Utrecht, Netherlands
| | - PYW Dankers
- Eindhoven University of Technology, Institute for Complex Molecular Systems, Eindhoven, Netherlands
| | - SAJ Chamuleau
- University Medical Center Utrecht, Experimental Cardiology, Utrecht, Netherlands
| | - P A Doevendans
- University Medical Center Utrecht, Experimental Cardiology, Utrecht, Netherlands
| | - M J Goumans
- Leiden University Medical Center, Molecular Cell Biology, Leiden, Netherlands
| | - J P Sluijter
- University Medical Center Utrecht, Experimental Cardiology, Utrecht, Netherlands
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Lei Z, Wang D, Chen N, Ma K, Lu W, Song Z, Cui S, Wang JH. Synapse Innervation and Associative Memory Cell Are Recruited for Integrative Storage of Whisker and Odor Signals in the Barrel Cortex through miRNA-Mediated Processes. Front Cell Neurosci 2017; 11:316. [PMID: 29118695 PMCID: PMC5661269 DOI: 10.3389/fncel.2017.00316] [Citation(s) in RCA: 10] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 09/26/2017] [Indexed: 11/13/2022] Open
Abstract
Associative learning is a common way for information acquisition, and the integrative storage of multiple associated signals is essential for associative thinking and logical reasoning. In terms of the cellular mechanism for associative memory, our studies by behavioral task and cellular imaging demonstrate that paired whisker and odor stimulations lead to odorant-induced whisker motion and associative memory cell recruitment in the barrel cortex (BC), which is driven presumably by synapse innervation from co-activated sensory cortices. To confirm these associative memory cells and synapse innervations essential for associative memory and to examine their potential mechanisms, we studied a causal relationship between epigenetic process and memory cell/synapse recruitment by manipulating miRNAs and observing the changes from the recruitments of associative memory cells and synapse innervations to associative memory. Anti-miRNA-324 and anti-miRNA-133a in the BC significantly downregulate new synapse innervation, associative memory cell recruitment and odorant-induced whisker motion, where Tau-tubulin kinase-1 expression is increased. Therefore, the upregulated miRNA-324 in associative learning knocks down Ttbk1-mediated Tau phosphorylation and microtubule depolymerization, which drives the balance between polymerization and depolymerization toward the axon prolongation and spine stabilization to initiate new synapse innervations and to recruit associative memory cells.
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Affiliation(s)
- Zhuofan Lei
- School of Pharmacy, Qingdao University, Dengzhou, China.,Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,Department of Biology, University of Chinese Academy of Sciences, Beijing, China
| | - Dangui Wang
- Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Na Chen
- Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Ke Ma
- School of Pharmacy, Qingdao University, Dengzhou, China
| | - Wei Lu
- School of Pharmacy, Qingdao University, Dengzhou, China.,Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Zhenhua Song
- School of Pharmacy, Qingdao University, Dengzhou, China
| | - Shan Cui
- Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Jin-Hui Wang
- School of Pharmacy, Qingdao University, Dengzhou, China.,Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,Department of Biology, University of Chinese Academy of Sciences, Beijing, China
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31
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Xihua L, Lei Z, Chaoping H, Shui zhen Z, Yi W. A comprehensive database of duchenne and becker muscular dystrophy patients in children's hospital of fudan university. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Tang C, Hou Y, Wang H, Wang K, Xiang H, Wan X, Xia Y, Li J, Wei W, Xu S, Lei Z, Pawlik TM, Wang H, Wu M, Shen F. Aspartate β-hydroxylase disrupts mitochondrial DNA stability and function in hepatocellular carcinoma. Oncogenesis 2017; 6:e362. [PMID: 28714949 PMCID: PMC5541716 DOI: 10.1038/oncsis.2017.64] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 06/12/2017] [Accepted: 06/14/2017] [Indexed: 02/07/2023] Open
Abstract
The mechanism of aberrant mitochondrial genome and function in hepatocellular carcinoma (HCC) remains largely unknown. Our previous study demonstrated an increased expression of aspartate β-hydroxylase (ASPH) in HCC tissues, which was associated with tumor invasiveness and a worse prognosis. Currently, we unexpectedly observed the presence of ASPH in purified mitochondrial protein fraction. In addition, immunostaining of both exogenously and endogenously expressed ASPH showed a colocalization with mitochondrial biomarkers. This study aimed to investigate whether the mitochondrial ASPH is involved in mitochondrial malfunction in HCC. Our results showed that ASPH overexpression in HCC tissues was correlated with decreased copy numbers of displacement loop (D-loop) and NADH dehydrogenase subunit 1 (ND-1) and enhanced D-loop mutation, suggesting the disrupted mitochondrial DNA (mtDNA) stability. The reduced mtDNA copy numbers were associated with aggressive clinicopathological features of HCC. The loss of mtDNA integrity induced by enforced expression of ASPH was accompanied with mitochondrial dysfunction, which was characterized by the aberrant mitochondrial membrane potential, decreased ATP generation and enhanced reactive oxygen species. In contrast, knocking down ASPH by siRNA in HCC cell lines showed the opposite impact on mtDNA integrity and function. Mass spectrometry and co-immunoprecipitation further identified that ASPH interacted with histone H2A member X (H2AX). ASPH overexpression diminished the interaction between H2AX and mitochondrial transcription factor A (mtTFA), an important DNA-binding protein for mtDNA replication, which then reduced the binding of mtTFA to D-loop region. Collectively, our results demonstrate that ASPH overexpression disrupts the mtDNA integrity through H2AX-mtTFA signal, thereby affecting mitochondrial functions in HCC.
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Affiliation(s)
- C Tang
- Department of Hepatic Surgery, The Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China.,Department of Hepatobiliary Surgery, The Daping Hospital, Third Military Medical University, Chongqing, China
| | - Y Hou
- Department of Hepatic Surgery, The Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - H Wang
- Department of Hepatic Surgery, The Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - K Wang
- Department of Hepatic Surgery, The Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - H Xiang
- Department of Hepatic Surgery, The Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - X Wan
- Department of Clinical Database, The Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - Y Xia
- Department of Hepatic Surgery, The Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - J Li
- Department of Hepatic Surgery, The Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - W Wei
- Department of Hepatic Surgery, The Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - S Xu
- Department of Hepatic Surgery, The Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - Z Lei
- Department of Hepatic Surgery, The Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - T M Pawlik
- Department of Surgery, The Ohio State University, Wexner Medical Center, Columbus, OH, USA
| | - H Wang
- National Scientific Center for Liver Cancer, Second Military Medical University, Shanghai, China
| | - M Wu
- Department of Hepatic Surgery, The Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - F Shen
- Department of Hepatic Surgery, The Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
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Zhang S, Dai W, Lu Z, Lei Z, Yang B, He B, Zhou H, Cao J. Preparation and evaluation of cefquinome-loaded gelatin microspheres and the pharmacokinetics in pigs. J Vet Pharmacol Ther 2017; 41:117-124. [PMID: 28656695 DOI: 10.1111/jvp.12429] [Citation(s) in RCA: 5] [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: 02/08/2017] [Accepted: 05/25/2017] [Indexed: 11/29/2022]
Abstract
Cefquinome (CEF) is widely used for veterinary clinical applications because of its broad spectrum and high efficiency. However, frequent administrations are required due to its short elimination half-life. In this study, cefquinome sulfate gelatin microspheres (CEF-GMS) were prepared as a sustained-release formulation using emulsion chemical cross-linking technique. Physical properties, stability, sustained-release property in vitro, and pharmacokinetics in pigs were assessed. The morphology of CEF-GMS showed a good sphericity with porous structure on the surface, and the mean diameter was 8.80 ± 0.78 μm, with 90.60 ± 3.98% of the total in the range of 5-20 μm. There were no significant changes of all estimated indexes in the stability tests. In vitro drug release study showed that the release of CEF from CEF-GMS was much slower than that from crude CEF in a release medium. Pharmacokinetic characteristics were evaluated following intramuscular administration of CEF-GMS or Cefquinome sulfate injection (CEF-Inj) in pigs at a dosage of 4 mg CEF/kg body weight. The plasma drug concentration-time data of CEF-GMS and CEF-Inj were both best fitted by two-compartment models with first-order absorption, and the elimination half-life of CEF-GMS was almost 10 times that of CEF-Inj. Overall, CEF-GMS might be used as a sustained-release formulation of CEF for veterinary clinical applications.
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Affiliation(s)
- S Zhang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China.,Unit of Animal Infectious Diseases, State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - W Dai
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Z Lu
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Z Lei
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
| | - B Yang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
| | - B He
- Institute of Animal Husbandry and Veterinary, Wuhan Academy of Agricultural Science and Technology, Wuhan, Hubei, China
| | - H Zhou
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China.,Unit of Animal Infectious Diseases, State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - J Cao
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
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Xue H, Ting G, Xue J, Lu H, Sun X, Li M, Zhou Y, Lei Z, Zhang Y. Construction and identification of a model for HJURP gene defect expression in human embryo villus cells. CLIN EXP OBSTET GYN 2017. [DOI: 10.12891/ceog3451.2017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Haocheng L, Han W, Lei Z, Lianming Z, Defeng L, Wenhao T, Jiaming M, Zhe Z, Yuzhuo Y, Hongliang Z, Kai H, Hui J. 023 Sexual Behavior and PDE5-Is Administration Habits Among Chinese Male: Data From the 2016 Internet Survey of Sexual Life. J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Li X, Gou C, Yao L, Lei Z, Gu T, Ren F, Wen T. Patients with HBV-related acute-on-chronic liver failure have increased concentrations of extracellular histones aggravating cellular damage and systemic inflammation. J Viral Hepat 2017; 24:59-67. [PMID: 27660136 DOI: 10.1111/jvh.12612] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [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: 04/14/2016] [Accepted: 08/05/2016] [Indexed: 12/30/2022]
Abstract
Acute-on-chronic liver failure (ACLF) is the most common type of liver failure and associated with grave consequences. Systemic inflammation has been linked to its pathogenesis and outcome, but the identifiable triggers are absent. Recently, extracellular histones, especially H4, have been recognized as important mediators of cell damage in various inflammatory conditions. This study aimed to investigate whether extracellular histones have clinical implications in patients with hepatitis B virus (HBV)-related ACLF. One hundred and twelve patients with HBV-related ACLF, 90 patients with chronic hepatitis B, 88 patients with HBV-related liver cirrhosis and 40 healthy volunteers were entered into this study. Plasma histone H4 levels, cytokine profile and clinical data were obtained. Besides, patient's sera were incubated overnight with human L02 hepatocytes or monocytic U937 cells in the presence or absence of antihistone H4 antibody, and cellular damage and cytokine production were evaluated. We found that plasma histone H4 levels were greatly increased in patients with ACLF as compared with chronic hepatitis B, liver cirrhosis and healthy control subjects and were significantly associated with disease severity, systemic inflammation and outcome. Notably, ACLF patients' sera incubation decreased cultured L02 cell integrity and induced profound cytokine production in the supernatant of U937 cells. Antihistone H4 antibody treatment abrogated these adverse effects, thus confirming a cause-effect relationship between extracellular histones and organ injury/dysfunction. The data support the hypothesis that the increased extracellular histone levels in ACLF patients may aggravate disease severity by inducing cellular injury and systemic inflammation. Histone-targeted therapies may have potentially interventional value in clinical practice.
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Affiliation(s)
- X Li
- Beijing You-An Hospital, Capital Medical University, Beijing, China
| | - C Gou
- Beijing You-An Hospital, Capital Medical University, Beijing, China
| | - L Yao
- Department of Forth Cadre, Chinese PLA Army General Hospital, Beijing, China
| | - Z Lei
- Medical Research Center, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - T Gu
- Department of Oncology, First Hospital of Qinhuangdao, Qinhuangdao, Hebei Province, China
| | - F Ren
- Beijing You-An Hospital, Capital Medical University, Beijing, China
| | - T Wen
- Medical Research Center, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
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Xue HQ, Ting G, Xue JJ, Lu HY, Sun XY, Li M, Zhou Y, Lei Z, Zhang YP. Construction and identification of a model for HJURP gene defect expression in human embryo villus cells. CLIN EXP OBSTET GYN 2017; 44:434-439. [PMID: 29949288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVES To construct a lentiviral vector for RNA interference (RNAi) of the HJURP gene and to identify the silencing efficiency in the human embryo villus cells and to provide a human embryo villus cells multiplication and chromosome segregation. MATERIALS AND METHODS In accordance with the study, three specific sequences of siRNA targeting HJURP gene were designed, synthesized, then the complementary DNA containing both sense and antisense oligonucleotides of the targeting sequences were annealed and inserted into the lentiviral vector.The correct clonings were confirmed by PCR and sequencing. The most effective recombinant lentivirus vector was screened, and the recombinant plasmids with the lentivirus packaging mixes were co-transfected into 293T cells to obtain packaged lentivirus particles. Then viral titer was determined. The silencing efficiency of target gene in human embryo villus cells was detected by Real-Time PCR. RESULTS DNA sequencing showed that the shRNA sequence was successfully inserted into the lentivirus vector. The recombinant lentiviral vector was successfully transfected into 293T cells. The recombinant lentivirus had a titer of 108 PFU/ml. After silencing HJURP gene in human embryo villus cells, the expression level of HJURP mRNA decreased significantly and the RNAi efficiency was greater than 70%. CONCLUSION A lentiviral shRNA expression vector targeting the HJURP gene was successfully constructed and may effectively silence the target gene at a cellular level, which provides a experimental model for the influence of HJURP gene expressing inhibition on human embryo villus cells multiplication and chromosome segregation.
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Hyman JD, Jiménez-Martínez J, Viswanathan HS, Carey JW, Porter ML, Rougier E, Karra S, Kang Q, Frash L, Chen L, Lei Z, O'Malley D, Makedonska N. Understanding hydraulic fracturing: a multi-scale problem. Philos Trans A Math Phys Eng Sci 2016; 374:rsta.2015.0426. [PMID: 27597789 PMCID: PMC5014299 DOI: 10.1098/rsta.2015.0426] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/28/2016] [Indexed: 06/06/2023]
Abstract
Despite the impact that hydraulic fracturing has had on the energy sector, the physical mechanisms that control its efficiency and environmental impacts remain poorly understood in part because the length scales involved range from nanometres to kilometres. We characterize flow and transport in shale formations across and between these scales using integrated computational, theoretical and experimental efforts/methods. At the field scale, we use discrete fracture network modelling to simulate production of a hydraulically fractured well from a fracture network that is based on the site characterization of a shale gas reservoir. At the core scale, we use triaxial fracture experiments and a finite-discrete element model to study dynamic fracture/crack propagation in low permeability shale. We use lattice Boltzmann pore-scale simulations and microfluidic experiments in both synthetic and shale rock micromodels to study pore-scale flow and transport phenomena, including multi-phase flow and fluids mixing. A mechanistic description and integration of these multiple scales is required for accurate predictions of production and the eventual optimization of hydrocarbon extraction from unconventional reservoirs. Finally, we discuss the potential of CO2 as an alternative working fluid, both in fracturing and re-stimulating activities, beyond its environmental advantages.This article is part of the themed issue 'Energy and the subsurface'.
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Affiliation(s)
- J D Hyman
- Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - J Jiménez-Martínez
- Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - H S Viswanathan
- Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - J W Carey
- Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - M L Porter
- Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - E Rougier
- Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - S Karra
- Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - Q Kang
- Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - L Frash
- Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - L Chen
- Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - Z Lei
- Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - D O'Malley
- Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM, USA
| | - N Makedonska
- Earth and Environmental Sciences, Los Alamos National Laboratory, Los Alamos, NM, USA
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39
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Lei Z. 1071 Effect of neuromedin u on pig immune regulation. J Anim Sci 2016. [DOI: 10.2527/jam2016-1071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ehlers K, Lin B, Li X, Pagidas K, Lei Z. Dysregulation of the hippo pathway in selective theca cell phosphatase and tensin homolog (tPten) mutant mice exhibiting a Polycystic Ovarian Syndrome (PCOS)-like phenotype. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Liao W, Chen L, Yu B, Lei Z, Wu X, Yang J, Ren J. Cell-based evaluation of a novel Dictyophora indusiata polysaccharide against oxidative-induced erythrocyte hemolysis. Cell Mol Biol (Noisy-le-grand) 2016; 62:38-44. [PMID: 26828985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 01/03/2016] [Indexed: 06/05/2023]
Abstract
The protective effect of a polysaccharide from Dictyophora indusiata(DP1)against oxidative hemolysis was comprehensively evaluated. The 2, 2-azobis (2-amidino-propane) dihydrochloride (AAPH)-induced erythrocyte hemolysis assay showed that DP1 exhibited excellent anti-hemolytic activity(87.4% hemolysis suppression ratio at 20 nmol/mL). Also, the formation of conjugated diene induced by cupric chloride (CuCl2) in plasma was significantly inhibited by DP1. Besides, DP1 could effectively inhibit AAPH-induced overproduction of reactive oxygen species (81.5% inhibition at 20 nmol/mL) and alleviated the enhancement of intracellular antioxidant enzymes including superoxide dismutase(SOD), glutathione peroxidase (GPX) and catalase (CAT) activities. Also, the malondialdehyde (MDA) formation caused by oxidative stress was suppressed by 57.0% at DP1 concentration of 20 nmol/mL. Taken together, the possible intracellular antioxidant detoxifying mechanism of DP1 was probably via preserving the activities of the antioxidant enzymes (SOD, GPx and CAT) as well as inhibiting lipid peroxidation, and thus alleviated erythrocytes oxidation and plasma oxidation.
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Affiliation(s)
- W Liao
- South China University of Technology College of Light Industry and Food Sciences Guangzhou China
| | - L Chen
- South China University of Technology College of Light Industry and Food Sciences Guangzhou China
| | - B Yu
- Zhengzhou University School of Pharmaceutical Sciences Zhengzhou China
| | - Z Lei
- South China University of Technology College of Light Industry and Food Sciences Guangzhou China
| | - X Wu
- South China University of Technology College of Light Industry and Food Sciences Guangzhou China
| | - J Yang
- South China University of Technology College of Light Industry and Food Sciences Guangzhou China
| | - J Ren
- South China University of Technology College of Light Industry and Food Sciences Guangzhou China
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Lei Z, Liu B, Wang JH. Reward memory relieves anxiety-related behavior through synaptic strengthening and protein kinase C in dentate gyrus. Hippocampus 2015; 26:502-16. [PMID: 26443682 DOI: 10.1002/hipo.22540] [Citation(s) in RCA: 7] [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] [Received: 07/01/2015] [Revised: 09/12/2015] [Accepted: 10/02/2015] [Indexed: 01/21/2023]
Abstract
Anxiety disorders are presumably associated with negative memory. Psychological therapies are widely used to treat this mental deficit in human beings based on the view that positive memory competes with negative memory and relieves anxiety status. Cellular and molecular processes underlying psychological therapies remain elusive. Therefore, we have investigated its mechanisms based on a mouse model in which food reward at one open-arm of the elevated plus-maze was used for training mice to form reward memory and challenge the open arms. Mice with the reward training showed increased entries and stay time in reward open-arm versus neutral open-arm as well as in open-arms versus closed-arms. Accompanying with reward memory formation and anxiety relief, glutamatergic synaptic transmission in dentate gyrus in vivo and dendritic spines in granule cells became upregulated. This synaptic up-regulation was accompanied by the expression of more protein kinase C (PKC) in the dendritic spines. The inhibition of PKC by chelerythrine impaired the formation of reward memory, the relief of anxiety-related behavior and the up-regulation of glutamate synapses. Our results suggest that reward-induced positive memory relieves mouse anxiety-related behavior by strengthening synaptic efficacy and PKC in the hippocampus, which imply the underlying cellular and molecular processes involved in the beneficial effects of psychological therapies treating anxiety disorders.
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Affiliation(s)
- Zhuofan Lei
- State Key Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China.,Qingdao University, Medical College, 38, Dengzhou, Shandong, China
| | - Bei Liu
- State Key Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Jin-Hui Wang
- State Key Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
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Wang D, Zhao J, Gao Z, Chen N, Wen B, Lu W, Lei Z, Chen C, Liu Y, Feng J, Wang JH. Neurons in the barrel cortex turn into processing whisker and odor signals: a cellular mechanism for the storage and retrieval of associative signals. Front Cell Neurosci 2015; 9:320. [PMID: 26347609 PMCID: PMC4543922 DOI: 10.3389/fncel.2015.00320] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 08/03/2015] [Indexed: 12/28/2022] Open
Abstract
Associative learning and memory are essential to logical thinking and cognition. How the neurons are recruited as associative memory cells to encode multiple input signals for their associated storage and distinguishable retrieval remains unclear. We studied this issue in the barrel cortex by in vivo two-photon calcium imaging, electrophysiology, and neural tracing in our mouse model that the simultaneous whisker and olfaction stimulations led to odorant-induced whisker motion. After this cross-modal reflex arose, the barrel and piriform cortices connected. More than 40% of barrel cortical neurons became to encode odor signal alongside whisker signal. Some of these neurons expressed distinct activity patterns in response to acquired odor signal and innate whisker signal, and others encoded similar pattern in response to these signals. In the meantime, certain barrel cortical astrocytes encoded odorant and whisker signals. After associative learning, the neurons and astrocytes in the sensory cortices are able to store the newly learnt signal (cross-modal memory) besides the innate signal (native-modal memory). Such associative memory cells distinguish the differences of these signals by programming different codes and signify the historical associations of these signals by similar codes in information retrievals.
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Affiliation(s)
- Dangui Wang
- State Key Lab of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences Beijing, China
| | - Jun Zhao
- State Key Lab of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences Beijing, China ; Department of Biology, University of Chinese Academy of Sciences Beijing, China
| | - Zilong Gao
- State Key Lab of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences Beijing, China ; Department of Biology, University of Chinese Academy of Sciences Beijing, China
| | - Na Chen
- State Key Lab of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences Beijing, China
| | - Bo Wen
- State Key Lab of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences Beijing, China
| | - Wei Lu
- Department of Pharmacology and Collaborative Innovation, Center for Neurodegenerative Disorders in Shandong, Qingdao University, Medical College Dengzhou, China
| | - Zhuofan Lei
- Department of Pharmacology and Collaborative Innovation, Center for Neurodegenerative Disorders in Shandong, Qingdao University, Medical College Dengzhou, China
| | - Changfeng Chen
- Department of Physiology, Bengbu Medical College Bengbu, China
| | - Yahui Liu
- Department of Physiology, Bengbu Medical College Bengbu, China
| | - Jing Feng
- State Key Lab of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences Beijing, China
| | - Jin-Hui Wang
- State Key Lab of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences Beijing, China ; Department of Biology, University of Chinese Academy of Sciences Beijing, China ; Department of Physiology, Bengbu Medical College Bengbu, China
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Wang P, Yang L, Li H, Lei Z, Yang X, Liu C, Jiang H, Zhang L, Zhou Z, Reinhardt JD, He C. Effects of whole-body vibration training with quadriceps strengthening exercise on functioning and gait parameters in patients with medial compartment knee osteoarthritis: a randomised controlled preliminary study. Physiotherapy 2015; 102:86-92. [PMID: 26111989 DOI: 10.1016/j.physio.2015.03.3720] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [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: 07/28/2014] [Accepted: 03/05/2015] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To compare the effects of whole-body vibration training (WBVT) with quadriceps strengthening exercise (QSE) with QSE alone on functioning and gait parameters in patients with medial compartment knee osteoarthritis. DESIGN Randomised controlled preliminary study. SETTING Department of Rehabilitation Medicine, West China Hospital, Chengdu, Sichuan, People's Republic of China. SUBJECTS Thirty-nine patients with medial compartment knee osteoarthritis. INTERVENTIONS Participants were assigned at random to one of two groups. MAIN MEASURES Visual analogue scale (VAS) for pain, Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), timed up and go test (TUG), 6-minute walk distance test (6MWD), and three-dimensional gait analysis during level walking at baseline, 12 weeks and 16 weeks (follow-up). RESULTS Compared with baseline, significant improvements in VAS, all WOMAC scales, TUG, 6MWD and all spatiotemporal parameters were seen in both the WBVT+QSE group and the QSE alone group at 12 and 16 weeks. However, the WBVT+QSE group showed greater improvements than the QSE alone group in WOMAC scales (physical function), TUG, 6MWD and cadence at 12 weeks. No differences were found between the WBVT+QSE and QSE alone groups in VAS, WOMAC scales (pain, stiffness), kinematic and kinetic gait parameters, and other spatiotemporal parameters at 12 weeks and 16 weeks. CONCLUSION Over a 3-month period, WBVT in combination with QSE improved symptoms, physical function and spatiotemporal parameters in patients with medial compartment knee osteoarthritis, and led to greater improvement than QSE alone in WOMAC scales (physical function), TUG, 6MWD and cadence.
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Affiliation(s)
- P Wang
- Rehabilitation Medicine Centre, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China; Key Laboratory of Rehabilitation Medicine in Sichuan, Chengdu, Sichuan, People's Republic of China
| | - L Yang
- Rehabilitation Medicine Centre, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China; Key Laboratory of Rehabilitation Medicine in Sichuan, Chengdu, Sichuan, People's Republic of China
| | - H Li
- Institute for Disaster Management and Reconstruction of Sichuan University and Hong Kong Polytechnic University, Chengdu, Sichuan, People's Republic of China
| | - Z Lei
- Rehabilitation Medicine Centre, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China
| | - X Yang
- Rehabilitation Medicine Centre, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China; Key Laboratory of Rehabilitation Medicine in Sichuan, Chengdu, Sichuan, People's Republic of China
| | - C Liu
- Rehabilitation Medicine Centre, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China; Key Laboratory of Rehabilitation Medicine in Sichuan, Chengdu, Sichuan, People's Republic of China
| | - H Jiang
- Rehabilitation Medicine Centre, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China
| | - L Zhang
- Rehabilitation Medicine Centre, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China
| | - Z Zhou
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China
| | - J D Reinhardt
- Institute for Disaster Management and Reconstruction of Sichuan University and Hong Kong Polytechnic University, Chengdu, Sichuan, People's Republic of China; Swiss Paraplegic Research, Nottwil, Lucerne, Switzerland; Department of Health Sciences and Health Policy, University of Lucerne, Lucerne, Switzerland
| | - C He
- Rehabilitation Medicine Centre, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China; Key Laboratory of Rehabilitation Medicine in Sichuan, Chengdu, Sichuan, People's Republic of China.
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Wang L, Yang H, Lei Z, Zhao J, Chen Y, Chen P, Li C, Zeng Y, Liu Z, Liu X, Zhang HT. Repression of TIF1γ by SOX2 promotes TGF-β-induced epithelial-mesenchymal transition in non-small-cell lung cancer. Oncogene 2015; 35:867-77. [PMID: 25961934 DOI: 10.1038/onc.2015.141] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 03/14/2015] [Accepted: 03/20/2015] [Indexed: 12/19/2022]
Abstract
TIF1γ is a novel regulator of transforming growth factor (TGF)-β/Smad signaling. Our previous studies show that dysregulated expression of transcriptional intermediary factor 1 γ (TIF1γ) and abnormal TGF-β/Smad signaling are implicated in non-small-cell lung cancer (NSCLC) separately. However, how TIF1γ contributes to NSCLC by controlling TGF-β/Smad signaling is poorly understood. Here, we investigated the mechanistic role of TIF1γ in TGF-β-induced epithelial-mesenchymal transition (EMT), as well as a link between TIF1γ and SOX2 in NSCLC. We show that TIF1γ is a downstream target of SOX2 in NSCLC cells. SOX2 overexpression negatively regulated TIF1γ promoter activity and thereby attenuated TIF1γ mRNA and protein expression levels; SOX2 knockdown significantly enhanced TIF1γ promoter activity and augmented TIF1γ expression. Moreover, TIF1γ mRNA expression was downregulated in human NSCLC tissues and negatively correlated with SOX2 protein, which was upregulated in NSCLC tissues. Importantly, knockdown of TIF1γ or SOX2 overexpression augmented SMAD4 (human Mad (mothers against decapentaplegic)-related homologous protein 4)-dependent transcriptional responses, and enhanced TGF-β-induced EMT and human NSCLC cell invasion; knockdown of SOX2 impaired TGF-β-induced EMT and NSCLC cell invasion. In an in vivo model of metastasis, knockdown of TIF1γ promotes NSCLC cell metastasis. In addition, our data suggested that TIF1γ inhibited TGF-β-induced EMT through competing with SMAD4 in NSCLC cells. Taken together, our findings reveal a new mechanism by which SOX2-mediated transcription repression of TIF1γ promotes TGF-β-induced EMT in NSCLC.
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Affiliation(s)
- L Wang
- Soochow University Laboratory of Cancer Molecular Genetics, Medical College of Soochow University, Suzhou, China.,Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, China
| | - H Yang
- Soochow University Laboratory of Cancer Molecular Genetics, Medical College of Soochow University, Suzhou, China.,Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, China
| | - Z Lei
- Soochow University Laboratory of Cancer Molecular Genetics, Medical College of Soochow University, Suzhou, China.,Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, China
| | - J Zhao
- Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, China.,Department of Thoracic and Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Medical College of Soochow University, Suzhou, China
| | - Y Chen
- Department of Thoracic and Cardiovascular Surgery, Second Affiliated Hospital of Soochow University, Medical College of Soochow University, Suzhou, China
| | - P Chen
- Systems Biology Laboratory, Research Programs Unit, Genome-Scale Biology, and Institute of Biomedicine, Biochemistry and Developmental Biology, Faculty of Medicine, University of Helsinki, Haartmaninkatu 8, Helsinki, Finland
| | - C Li
- Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, China.,Department of Thoracic and Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Medical College of Soochow University, Suzhou, China
| | - Y Zeng
- Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, China.,Department of Thoracic and Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Medical College of Soochow University, Suzhou, China
| | - Z Liu
- Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, China.,Department of Thoracic and Cardiovascular Surgery, First Affiliated Hospital of Soochow University, Medical College of Soochow University, Suzhou, China
| | - X Liu
- Soochow University Laboratory of Cancer Molecular Genetics, Medical College of Soochow University, Suzhou, China.,Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, China
| | - H-T Zhang
- Soochow University Laboratory of Cancer Molecular Genetics, Medical College of Soochow University, Suzhou, China.,Suzhou Key Laboratory for Molecular Cancer Genetics, Suzhou, China
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Patel U, Sobowale K, Fan J, Liu NN, Kuwabara S, Lei Z, Sherer R, Voorhees BV. Cultural considerations for adaptation of an internet-based intervention
for depression prevention in Mainland China. Ann Glob Health 2015. [DOI: 10.1016/j.aogh.2015.02.985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Redding S, Li X, Wu G, Ko C, Cooney A, Bohler H, Lan ZJ, Lei Z. Transforming growth factor-B1 (TGF-B1) and fibroblast growth factor-7 (FGF-7) elevated in ovaries of selective theca cell phosphatase and tensin homolog mutant (tPtenMT) mice with PCOS-like phenotype. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Lei Z, M Brandt M, Van Mil A, Grundmann S, Smits M, Van Middelaar B, Fukao T, Cheng C, Doevendans P, Sluijter JPG. P66MicroRNA-132/212 family promotes arteriogenesis by prolonging Ras-MAPK signaling. Cardiovasc Res 2014. [DOI: 10.1093/cvr/cvu082.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Yang Z, Shi X, Zhang Y, Wang S, Lei Z, Liu X, Fan D. Retrospective analysis of factors affecting the efficacy of surgical treatment of the scar. MINERVA CHIR 2014; 69:83-89. [PMID: 24504221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM The scar is a major problem in the medical profession. Its timely treatment is very important for the better outcome of the scar treatment and for the improvement of the life quality of the patients. The aim of this study was retrospectively analyzed the epidemiological characteristics affecting the efficacy of the scar surgical treatment of the people in the western part of China. METHODS Total 414 scar cases were retrospectively analyzed to clarify the epidemiological characteristics and the factors affecting the scar surgical treatment efficacy. The factors included were sex, age, area distribution, treatment seasons, injury sites, injury causes, and the time from scarring to the surgical treatment. All scar cases were surgically treated with the repairing technology including skin graft, flap and soft tissue dilation. RESULTS There were 206 males and 208 females with the average age 20.53±12.9 years (age range 1-68 years). The patient proportions in the age groups of 0-20, 21-40 and >40 years were 61.4% (254 cases), 29.2% (121 cases), and 9.4% (39 cases) respectively. The patient's attendance rate reached the highest during the summer and winter. Most patients were from the rural areas with an increasing tendency each year. The burn scars were the most abundant and the injury sites were mostly the head and face. Univariate analysis showed that the time from scarring to the surgical treatment and the injury sites were significantly influenced the scar surgical treatment efficacy. Logistic regression analysis demonstrated that the injured sites of the head and face significantly influenced the scar surgical treatment efficacy. CONCLUSION With the development of economy in China, more scar patients especially younger and children visit doctors predominantely from the rural areas. Usually, they get their scars in the exposed area of their bodies (head and face) which seriously affect the patient's appearance and function. Factors influencing the scar surgical treatment efficacy has important clinical significance of prevention and treatment.
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Affiliation(s)
- Z Yang
- Department of Plastic and Cosmetic Surgery Xinqiao Hospital, Third Military Medical University, Republic of China -
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Peng KW, Lei Z, Xiao TH, Jia FG, Zhong WX, Gao Y, Shen BX, Xie JW. First trimester caesarean scar ectopic pregnancy evaluation using MRI. Clin Radiol 2014; 69:123-9. [DOI: 10.1016/j.crad.2013.07.021] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 05/21/2013] [Accepted: 07/24/2013] [Indexed: 10/25/2022]
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