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Effects of miR-219/miR-338 on microglia and astrocyte behaviors and astrocyte-oligodendrocyte precursor cell interactions 预览
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作者 Lan Huong Nguyen William Ong +3 位作者 Kai Wang Mingfeng Wang Dean Nizetic Sing Yian Chew 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第4期739-747,共9页
MiR-219 and miR-338(miR-219/miR-338)are oligodendrocyte-specific microRNAs.The overexpression of these miRs in oligodendrocyte precursor cells promotes their differentiation and maturation into oligodendrocytes,which ... MiR-219 and miR-338(miR-219/miR-338)are oligodendrocyte-specific microRNAs.The overexpression of these miRs in oligodendrocyte precursor cells promotes their differentiation and maturation into oligodendrocytes,which may enhance axonal remyelination after nerve injuries in the central nervous system(CNS).As such,the delivery of miR-219/miR-338 to the CNS to promote oligodendrocyte precursor cell differentiation,maturation and myelination could be a promising approach for nerve repair.However,nerve injuries in the CNS also involve other cell types,such as microglia and astrocytes.Herein,we investigated the effects of miR-219/miR-338 treatment on microglia and astrocytes in vitro and in vivo.We found that miR-219/miR-338 diminished microglial expression of pro-inflammatory cytokines and suppressed astrocyte activation.In addition,we showed that miR-219/miR-338 enhanced oligodendrocyte precursor cell differentiation and maturation in a scratch assay paradigm that re-created a nerve injury condition in vitro.Collectively,our results suggest miR-219/miR-338 as a promising treatment for axonal remyelination in the CNS following nerve injuries.All experimental procedures were approved by the Institutional Animal Care and Use Committee(IACUC),Nanyang Technological University(approval No.A0309 and A0333)on April 27,2016 and October 8,2016. 展开更多
关键词 central nervous system electrospinning gene SILENCING GLIA hydrogel MYELINATION nanofibers oligodendroglial POLYCAPROLACTONE spinal cord injury
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Glycogen synthase kinase 3:a crucial regulator of axotomy-induced axon regeneration 预览
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作者 Jinlian Liu Qing Zhou +2 位作者 Chaoqun Liu Chunfeng Liu Saijilafu 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第5期859-860,共2页
Following nerve injury,axonal disconnection in neurons usually results in persistent functional deficits,such as paralysis.However,axons in the adult mammalian central nervous system (CNS) have very limited regenerati... Following nerve injury,axonal disconnection in neurons usually results in persistent functional deficits,such as paralysis.However,axons in the adult mammalian central nervous system (CNS) have very limited regenerative ability.Understanding the molecular mechanism of controlling axon regeneration can provide idea for the design of effective therapeutic interventions for CNS injury,such as spinal cord injuries.Efficient axonal regeneration is achieved via gene expression in the neuronal soma,axonal transport of raw materials along the shaft,and membrane and cytoskeleton assembly at the nerve growth cone.Each process is delicately regulated by spatial-temporal controlled signaling pathways that target distinct effectors.Gene expression in the neuronal soma,especially of transcription factors,is often activated immediately following nerve injury.Injury signals at distal axons are interpreted and transmitted back to the soma,initiating a stream of gene expression events which positively regulate subsequent axonal regeneration.Over the past few decades,extensive studies have identified many regeneration-associated genes,including CREB,nuclear factor of activated T-cells,protein 53,Sprr1a,c-Jun,Smad1,activating transcription factor 3,signal transducer and activator of transcription 3,SRF,Sox11,and Kruppel-like factors.However,we know far less about how the coordinated expression of these regeneration-associated genes is regulated during axonal regeneration.Indeed,it is possible that they are regulated by a single common upstream regulator.If so,identification of this upstream regulator will provide us with an invaluable target for the development of more effective treatments for traumatic nerve injuries.Adult dorsal root ganglion (DRG) neurons represent a favorable medium in which to study the molecular mechanisms controlling intrinsic neuronal axon growth ability.Axotomy of the peripheral branch of a DRG neuron,known as a “conditioning lesion”,has been well-documented to greatly accelerate axonal growth both in v 展开更多
关键词 GENE expression SPINAL CORD CENTRAL nervous system
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Different protein expression patterns in rat spinal nerves during wallerian degeneration assessed using isobaric tags for relative and absolute quantitation proteomics profiling 预览
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作者 Shuai Wei Xue-Zhen Liang +12 位作者 Qian Hu Wei-Shan Wang Wen-Jing Xu Xiao-Qing Cheng Jiang Peng Quan-Yi Guo Shu-Yun Liu Wen Jiang Xiao Ding Gong-Hai Han Ping Liu Chen-Hui Shi Yu Wang 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第2期315-323,共9页
Sensory and motor nerve fibers of peripheral nerves have different anatomies and regeneration functions after injury. To gain a clear understanding of the biological processes behind these differences, we used a label... Sensory and motor nerve fibers of peripheral nerves have different anatomies and regeneration functions after injury. To gain a clear understanding of the biological processes behind these differences, we used a labeling technique termed isobaric tags for relative and absolute quantitation to investigate the protein profiles of spinal nerve tissues from Sprague-Dawley rats. In response to Wallerian degeneration, a total of 626 proteins were screened in sensory nerves, of which 368 were upregulated and 258 were downregulated. In addition, 637 proteins were screened in motor nerves, of which 372 were upregulated and 265 were downregulated. All identified proteins were analyzed using the Gene Ontology and Kyoto Encyclopedia of Genes and Genomes analysis of bioinformatics, and the presence of several key proteins closely related to Wallerian degeneration were tested and verified using quantitative real-time polymerase chain reaction analyses. The differentially expressed proteins only identified in the sensory nerves were mainly relevant to various biological processes that included cell-cell adhesion, carbohydrate metabolic processes and cell adhesion, whereas differentially expressed proteins only identified in the motor nerves were mainly relevant to biological processes associated with the glycolytic process, cell redox homeostasis, and protein folding. In the aspect of the cellular component, the differentially expressed proteins in the sensory and motor nerves were commonly related to extracellular exosomes, the myelin sheath, and focal adhesion. According to the Kyoto Encyclopedia of Genes and Genomes, the differentially expressed proteins identified are primarily related to various types of metabolic pathways. In conclusion, the present study screened differentially expressed proteins to reveal more about the differences and similarities between sensory and motor nerves during Wallerian degeneration. The present findings could provide a reference point for a future investigation into the differences between s 展开更多
关键词 gene ontology Kyoto ENCYCLOPEDIA of Genes and Genomes ISOBARIC tags for RELATIVE and absolute quantitation motor NERVE PROTEOMICS sensory NERVE spinal NERVE Wallerian degeneration
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Protein microarray analysis of cytokine expression changes in distal stumps after sciatic nerve transection 预览
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作者 Xiao-Qing Cheng Xue-Zhen Liang +9 位作者 Shuai Wei Xiao Ding Gong-Hai Han Ping Liu Xun Sun Qi Quan He Tang Qing Zhao Ai-Jia Shang Jiang Peng 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第3期503-511,共9页
A large number of chemokines,cytokines,other trophic factors and the extracellular matrix molecules form a favorable microenvironment for peripheral nerve regeneration.This microenvironment is one of the major factors... A large number of chemokines,cytokines,other trophic factors and the extracellular matrix molecules form a favorable microenvironment for peripheral nerve regeneration.This microenvironment is one of the major factors for regenerative success.Therefore,it is important to investigate the key molecules and regulators affecting nerve regeneration after peripheral nerve injury.However,the identities of specific cytokines at various time points after sciatic nerve injury have not been determined.The study was performed by transecting the sciatic nerve to establish a model of peripheral nerve injury and to analyze,by protein microarray,the expression of different cytokines in the distal nerve after injury.Results showed a large number of cytokines were up-regulated at different time points post injury and several cytokines,e.g.,ciliary neurotrophic factor,were downregulated.The construction of a protein-protein interaction network was used to screen how the proteins interacted with differentially expressed cytokines.Kyoto Encyclopedia of Genes and Genomes pathway and Gene ontology analyses indicated that the differentially expressed cytokines were significantly associated with chemokine signaling pathways,Janus kinase/signal transducers and activators of transcription,phosphoinositide 3-kinase/protein kinase B,and notch signaling pathway.The cytokines involved in inflammation,immune response and cell chemotaxis were up-regulated initially and the cytokines involved in neuronal apoptotic processes,cell-cell adhesion,and cell proliferation were up-regulated at 28 days after injury.Western blot analysis showed that the expression and changes of hepatocyte growth factor,glial cell line-derived neurotrophic factor and ciliary neurotrophic factor were consistent with the results of protein microarray analysis.The results provide a comprehensive understanding of changes in cytokine expression and changes in these cytokines and classical signaling pathways and biological functions during Wallerian degeneration,as well as a bas 展开更多
关键词 cytokines DISTAL stump gene ontology KYOTO ENCYCLOPEDIA of Genes and Genomes pathway peripheral nerve injury protein microarray PROTEIN-PROTEIN interaction network Wallerian degeneration
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Protective effect of rhodioloside and bone marrow mesenchymal stem cells infected with HIF-1-expressing adenovirus on acute spinal cord injury 预览
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作者 Xiao-Qin Ha Bo Yang +3 位作者 Huai-Jing Hou Xiao-Ling Cai Wan-Yuan Xiong Xu-Pan Wei 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第4期690-696,共7页
Rhodioloside has been shown to protect cells from hypoxia injury,and bone marrow mesenchymal stem cells have a good effect on tissue repair.To study the effects of rhodioloside and bone marrow mesenchymal stem cells o... Rhodioloside has been shown to protect cells from hypoxia injury,and bone marrow mesenchymal stem cells have a good effect on tissue repair.To study the effects of rhodioloside and bone marrow mesenchymal stem cells on spinal cord injury,a rat model of spinal cord injury was established using the Infinite Horizons method.After establishing the model,the rats were randomly divided into five groups.Rats in the control group were intragastrically injected with phosphate buffered saline(PBS)(5μL).PBS was injected at 6 equidistant points around 5 mm from the injury site and at a depth of 5 mm.Rats in the rhodioloside group were intragastrically injected with rhodioloside(5 g/kg)and intramuscularly injected with PBS.Rats in the mesenchymal stem cell(MSC)group were intramuscularly injected with PBS and intramuscularly with MSCs(8×10^6/mL in a 50-μL cell suspension).Rats in the Ad-HIF-MSC group were intragastrically injected with PBS and intramuscularly injected with HIF-1 adenovirus-infected MSCs.Rats in the rhodioloside+Ad-HIF-MSC group were intramuscularly injected with MSCs infected with the HIF-1 adenovirus and intragastrically injected with rhodioloside.One week after treatment,exercise recovery was evaluated with a modified combined behavioral score scale.Hematoxylin-eosin staining and Pischingert’s methylene blue staining were used to detect any histological or pathological changes in spinal cord tissue.Levels of adenovirus IX and Sry mRNA were detected by real-time quantitative polymerase chain reaction and used to determine the number of adenovirus and mesenchymal stem cells that were transfected into the spinal cord.Immunohistochemical staining was applied to detect HIF-1 protein levels in the spinal cord.The results showed that:(1)compared with the other groups,the rhodioloside+Ad-HIF-MSC group exhibited the highest combined behavioral score(P<0.05),the most recovered tissue,and the greatest number of neurons,as indicated by Pischingert’s methylene blue staining.(2)Compared with the PBS group,HIF-1 pro 展开更多
关键词 acute spinal cord injury ADENOVIRUS ADENOVIRUS gene IX bone MARROW mesenchymal stem cells combined behavioral score scale HIF-1α NERVE regeneration NERVE repair RHODIOLA rosea SRY
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Type XIX collagen:a promising biomarker from the basement membranes 预览
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作者 Ana CCalvo Laura Moreno +11 位作者 Leticia Moreno Janne M.Toivonen Raquel Manzano Nora Molina Miriam de la Torre Tresa López Francisco J.Miana-Mena María J.Muñoz Pilar Zaragoza Pilar Larrodé Alberto García-Redondo Rosario Osta 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第6期988-995,共8页
Among collagen members in the collagen superfamily,type XIX collagen has raised increasing interest in relation to its structural and biological roles.Type XIX collagen is a Fibril-Associated Collagen with Interrupted... Among collagen members in the collagen superfamily,type XIX collagen has raised increasing interest in relation to its structural and biological roles.Type XIX collagen is a Fibril-Associated Collagen with Interrupted Triple helices member,one main subclass of collagens in this superfamily.This collagen contains a triple helix composed of three polypeptide segments aligned in parallel and it is associated with the basement membrane zone in different tissues.The molecular structure of type XIX collagen consists of five collagenous domains,COL1 to COL5,interrupted by six non-collagenous domains,NCI to NC6.The most relevant domain by which this collagen exerts its biological roles is NCI domain that can be cleavage enzymatically to release matricryptins,exerting anti-tumor and anti-angiogenic effect in murine and human models of cancer.Under physiological conditions,type XIX collagen expression decreases after birth in different tissues although it is necessary to keep its basal levels,mainly in skeletal muscle and hippocampal and telencephalic interneurons in brain.Notwithstanding,in amyotrophic lateral sclerosis,altered transcript expression levels show a novel biological effect of this collagen beyond its structural role in basement membranes and its anti-tumor and anti-angiogenic properties.Type XIX collagen can exert a compensatory effect to ameliorate the disease progression under neurodegenerative conditions specific to amyotrophic lateral sclerosis in transgenic SOD1 G93 A mice and amyotrophic lateral sclerosis patients.This novel biological role highlights its nature as prognostic biomarker of disease progression in and as promising therapeutic target,paving the way to a more precise prognosis of amyotrophic lateral sclerosis. 展开更多
关键词 anti-tumor and anti-angiogenic properties C1 domain COL19A1 gene and protein levels compensatory effect FACIT collagens hippocampal interneurons matricryptins multiplexins NC1 domain regenerative response skeletal muscle type XIX collagen
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Single-nucleotide polymorphism screening and RNA sequencing of key messenger RNAs associated with neonatal hypoxic-ischemia brain damage 预览
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作者 Liu-Lin Xiong Lu-Lu Xue +7 位作者 Mohammed Al-Hawwas Jin Huang Rui-Ze Niu Ya-Xin Tan Yang Xu Ying-Ying Su Jia Liu Ting-Hua Wang 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第1期86-95,共10页
A single-nucleotide polymorphism(SNP)is an alteration in one nucleotide in a certain position within a genome.SNPs are associated with disease susceptibility.However,the influences of SNPs on the pathogenesis of neona... A single-nucleotide polymorphism(SNP)is an alteration in one nucleotide in a certain position within a genome.SNPs are associated with disease susceptibility.However,the influences of SNPs on the pathogenesis of neonatal hypoxic-ischemic brain damage remain elusive.Seven-day-old rats were used to establish a hypoxic ischemic encephalopathy model.SNPs and expression profiles of mRNAs were analyzed in hypoxic ischemic encephalopathy model rats using RNA sequencing.Genes exhibiting SNPs associated with hypoxic ischemic encephalopathy were identified and studied by gene ontology and pathway analysis to identify their possible involvement in the disease mechanism.We identified 89 up-regulated genes containing SNPs that were mainly located on chromosome 1 and 2.Gene ontology analysis indicated that the up-regulated genes containing SNPs are mainly involved in angiogenesis,wound healing and glutamatergic synapse and biological processing of calcium-activated chloride channels.Signaling pathway analysis indicated that the differentially expressed genes play a role in glutamatergic synapses,long-term depression and oxytocin signaling.Moreover,intersection analysis of high throughput screening following PubMed retrieval and RNA sequencing for SNPs showed that CSRNP1,DUSP5 and LRRC25 were most relevant to hypoxic ischemic encephalopathy.Significant up-regulation of genes was confirmed by quantitative real-time polymerase chain reaction analysis of oxygen-glucose-deprived human fetal cortical neurons.Our results indicate that CSRNP1,DUSP5 and LRRC25,containing SNPs,may be involved in the pathogenesis of hypoxic ischemic encephalopathy.These findings indicate a novel direction for further hypoxic ischemic encephalopathy research.This animal study was approved on February 5,2017 by the Animal Care and Use Committee of Kunming Medical University,Yunnan Province,China(approval No.kmmu2019038).Cerebral tissue collection from a human fetus was approved on September 30,2015 by the Ethics Committee of Kunming Medical University,Chin 展开更多
关键词 CSRNP1 DUSP5 gene ontology ANALYSIS human FETAL CORTICAL neurons LRRC25 mRNA NEONATAL HYPOXIC ischemic ENCEPHALOPATHY pathogenesis signaling pathway ANALYSIS
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Bioinformatic identification of key candidate genes and pathways in axon regeneration after spinal cord injury in zebrafish 预览
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作者 Jia-He Li Zhong-Ju Shi +6 位作者 Yan Li Bin Pan Shi-Yang Yuan Lin-Lin Shi Yan Hao Fu-Jiang Cao Shi-Qing Feng 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第1期103-111,共9页
Zebrafish and human genomes are highly homologous;however,despite this genomic similarity,adult zebrafish can achieve neuronal proliferation,regeneration and functional restoration within 6–8 weeks after spinal cord ... Zebrafish and human genomes are highly homologous;however,despite this genomic similarity,adult zebrafish can achieve neuronal proliferation,regeneration and functional restoration within 6–8 weeks after spinal cord injury,whereas humans cannot.To analyze differentially expressed zebrafish genes between axon-regenerated neurons and axon-non-regenerated neurons after spinal cord injury,and to explore the key genes and pathways of axonal regeneration after spinal cord injury,microarray GSE56842 was analyzed using the online tool,GEO2R,in the Gene Expression Omnibus database.Gene ontology and protein-protein interaction networks were used to analyze the identified differentially expressed genes.Finally,we screened for genes and pathways that may play a role in spinal cord injury repair in zebrafish and mammals.A total of 636 differentially expressed genes were obtained,including 255 up-regulated and 381 down-regulated differentially expressed genes in axon-regenerated neurons.Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment results were also obtained.A protein-protein interaction network contained 480 node genes and 1976 node connections.We also obtained the 10 hub genes with the highest correlation and the two modules with the highest score.The results showed that spectrin may promote axonal regeneration after spinal cord injury in zebrafish.Transforming growth factor beta signaling may inhibit repair after spinal cord injury in zebrafish.Focal adhesion or tight junctions may play an important role in the migration and proliferation of some cells,such as Schwann cells or neural progenitor cells,after spinal cord injury in zebrafish.Bioinformatic analysis identified key candidate genes and pathways in axonal regeneration after spinal cord injury in zebrafish,providing targets for treatment of spinal cord injury in mammals. 展开更多
关键词 axonal REGENERATION differentially expressed GENES focal ADHESIONS Gene Ontology Kyoto Encyclopedia of GENES and Genomes neural REGENERATION protein-protein interaction network SIGNALING PATHWAY SPECTRIN tight junctions transforming growth factor beta Wnt SIGNALING PATHWAY
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Beta-nerve growth factor gene therapy alleviates pyridoxine-induced neuropathic damage by increasing doublecortin and tyrosine kinase A in the dorsal root ganglion 预览
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作者 Hyun-Kee Cho Woosuk Kim +4 位作者 Kwon-Young Lee Jin-Ok Ahn Jung Hoon Choi In Koo Hwang Jin-Young Chung 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第1期162-168,共7页
Beta-nerve growth factor(β-NGF)is known to be a major leading cause of neuronal plasticity.To identify the possible action mechanisms ofβ-NGF gene therapy for sciatic nerve recovery,experimental dogs were randomly d... Beta-nerve growth factor(β-NGF)is known to be a major leading cause of neuronal plasticity.To identify the possible action mechanisms ofβ-NGF gene therapy for sciatic nerve recovery,experimental dogs were randomly divided into control,pyridoxine,and pyridoxine+β-NGF groups.We observed chronological changes of morphology in the dorsal root ganglia in response to pyridoxine toxicity based on cresyl violet staining.The number of large neurons positive for cresyl violet was dramatically decreased after pyridoxine intoxication for 7 days in the dorsal root ganglia and the neuron number was gradually increased after pyridoxine withdrawal.In addition,we also investigated the effects ofβ-NGF gene therapy on neuronal plasticity in pyridoxine-induced neuropathic dogs.To accomplish this,tyrosine kinase receptor A(TrkA),βIII-tubulin and doublecortin(DCX)immunohistochemical staining was performed at 3 days after the last pyridoxine treatment.TrkA-immunoreactive neurons were dramatically decreased in the pyridoxine group compared to the control group,but strong TrkA immunoreactivity was observed in the small-sized dorsal root ganglia in this group.TrkA immunoreactivity in the dorsal root ganglia was similar betweenβ-NGF and control groups.The numbers ofβⅢ-tubulin-and DCX-immunoreactive cells decreased significantly in the pyridoxine group compared to the control group.However,the reduction ofβⅢ-tubulin-and DCX-immunoreactive cells in the dorsal root ganglia in theβ-NGF group was significantly ameliorated than that in the pyridoxine group.These results indicate thatβ-NGF gene therapy is a powerful treatment of pyridoxine-induced neuropathic damage by increasing the TrkA and DCX levels in the dorsal root ganglia.The experimental protocol was approved by the Institutional Animal Care and Use Committee(IACUC)of Seoul National University,South Korea(approval No.SNU-060623-1,SNU-091009-1)on June 23,2006 and October 9,2009,respectively. 展开更多
关键词 β-nerve growth factor βⅢ-tubulin DOUBLECORTIN gene therapy neuron-glial antigen 2 neuropathy PYRIDOXINE
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Highlights of ASS234:a novel and promising therapeutic agent for Alzheimer’s disease therapy 预览
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作者 Alejandro Romero JoséMarco-Contelles Eva Ramos 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第1期30-35,共6页
There is no effective treatment to face Alzheimer’s disease complexity.Multitarget molecules are a good approach against the multiple physiopathological events associated with its development and progression.In this ... There is no effective treatment to face Alzheimer’s disease complexity.Multitarget molecules are a good approach against the multiple physiopathological events associated with its development and progression.In this context,N-((5-(3-(1-benzylpiperidin-4-yl)propoxy)-1-methyl-1H-indol-2-yl)methyl)-N-methylprop-2-yn-1-amine(ASS234)has been tested achieving promising results.ASS234 has demonstrated to cross the blood-brain barrier in vivo,and a good in silico safety profile being less toxic than donepezil.Besides,ASS234 reversibly inhibits human acetyl-and butyryl-cholinesterase,and irreversibly inhibits human monoamine oxidase A and B.Moreover,this multitarget molecule has antioxidant and neuroprotective properties,and inhibitsΑβ1–42 andΑβ1–40 self-aggregation.Inquiring about the mechanism of action,several signaling pathways related to Alzheimer’s disease had been explored showing that ASS234 induces the wingless-type MMTV integration site(Wnt)family and several members of the heat shock proteins family and moreover counteracts neuroinflammatory and oxidative stress-related genes promoting the induction of several key antioxidant genes.Finally,in vivo experiments with ASS234 in C57BL/6J mice displayed its ability to reduce amyloid plaque burden and gliosis in the cortex and hippocampus,ameliorating scopolamine-induced learning deficits.Here we gather the information regarding ASS234 evaluated so far,showing its ability to face different targets,necessary to counteract a neurodegenerative disease as complex as the Alzheimer’s disease. 展开更多
关键词 ACHE BuChE gene expression heat shock proteins inflammation in silico TOXICOLOGY MAO A/B NEUROPROTECTION oxidative stress Wnt signaling
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Comparison of Five Endogenous Reference Genes for Specific PCR Detection and Quantification of Rice 预览
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作者 ZHANG Xiujie JIN Wujun +4 位作者 XU Wentao LI Xiaying SHANG Ying LI Sha OUYANG Hongsheng 《水稻科学:英文版》 CSCD 2019年第4期248-256,I0006,I0007共11页
Endogenous reference genes (ERGs) provide vital information regarding genetically modified organisms (GMOs). The successful detection of ERGs can identity GMOs and the source of genes, verify stability and reliability... Endogenous reference genes (ERGs) provide vital information regarding genetically modified organisms (GMOs). The successful detection of ERGs can identity GMOs and the source of genes, verify stability and reliability of the detection system, and calculate the level of genetically modified (GM) ingredients in mixtures. The reported ERGs in rice include sucrose-phosphate synthase (SPS), phospholipase D (PLD), RBE4 and rice root-specific GOS9 genes. Based on the characteristics of ERGs, a new ERG gene, phosphoenolpyruvate carboxylase (PEPC), was selected, and further compared with the four existing genes. A total of 18 rice varieties and 29 non-rice crops were used to verify the interspecies specificity, intraspecies consistency, sensitivity, stability and reliability of these five ERGs using qualitative and quantitative PCR. Qualitative detection indicated that SPS and PEPC displayed sufficient specificity, and the detection sensitivity was 0.05% and 0.005%, respectively. Although the specificity of both RBE4 and GOS9 were adequate, the amplicons were small and easily confused with primer dimers. Non-specific amplification of the PLD gene was present in maize and potato. Real-time quantitative PCR detection indicated that PLD, SPS and PEPC displayed good specificity, with R2 of the standard curve greater than 0.98, while the amplification efficiency ranged between 90% and 110%. Both the detection sensitivities of PLD and PEPC were five copies and that of SPS was ten copies. RBE4 showed typical amplification in maize, beet and Arabidopsis, while GOS9 was found in maize, tobacco and oats. PEPC exhibited excellent detection sensitivity and species specificity, which made it a potentially useful application in GM-rice supervision and administration. Additionally, SPS and PLD are also suitable for GM-rice detection. This study effectively established a foundation for GMO detection, which not only provides vital technical support for GMO identification, but also is of great significance for enhancing the comparability o 展开更多
关键词 ENDOGENOUS reference GENE RICE genetically modified crop PHOSPHOENOLPYRUVATE CARBOXYLASE GENE sucrose-phosphate synthase GENE phospholipase D GENE starch branching enzyme 4 GENE RICE root-specific GOS9 GENE
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Harnessing the potential of gene editing technology using CRISPR in inflammatory bowel disease 预览
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作者 Viktor Limanskiy Arpita Vyas +1 位作者 Lakshmi Shankar Chaturvedi Dinesh Vyas 《世界胃肠病学杂志:英文版》 SCIE CAS 2019年第18期2177-2187,共11页
The molecular scalpel of clustered regularly interspersed short palindromic repeats/CRISPR associated protein 9 (CRISPR/Cas9) technology may be sharp enough to begin cutting the genes implicated in inflammatory bowel ... The molecular scalpel of clustered regularly interspersed short palindromic repeats/CRISPR associated protein 9 (CRISPR/Cas9) technology may be sharp enough to begin cutting the genes implicated in inflammatory bowel disease (IBD) and consequently decrease the 6.3 billion dollar annual financial healthcare burden in the treatment of IBD. For the past few years CRISPR technology has drastically revolutionized DNA engineering and biomedical research field. We are beginning to see its application in gene manipulation of sickle cell disease, human immunodeficiency virus resistant embryologic twin gene modification and IBD genes such as Gatm (Glycine amidinotransferase, mitochondrial), nucleotide-binding oligomerization domain-containing protein 2, KRT12 and other genes implicated in adaptive immune convergence pathways have been subjected to gene editing, however there are very few publications. Furthermore, since Crohn’s disease and ulcerative colitis have shared disease susceptibility and share genetic gene profile, it is paramount and is more advantageous to use CRISPR technology to maximize impact. Although, currently CRISPR does have its limitations due to limited number of specific Cas enzymes, off-target activity, protospacer adjacent motifs and crossfire between different target sites. However, these limitations have given researchers further insight on how to augment and manipulate enzymes to enable precise gene excision and limit crossfire between target sites. 展开更多
关键词 Clustered regularly interspersed short palindromic REPEATS INFLAMMATORY BOWEL DISEASE Crohn’s DISEASE Ulcerative colitis GENE excision GENE EDITING GENE therapy Financial impact of INFLAMMATORY BOWEL DISEASE on healthcare Clustered regularly interspersed short palindromic REPEATS crossfire
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Polymorphism analysis of virulence-related genes among Candida tropicalis isolates
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作者 Li-Juan Zhang Shuan-Bao Yu +3 位作者 Wen-Ge Li Wen-Zhu Zhang Yuan WU Jin-Xing Lu 《中华医学杂志:英文版》 SCIE CAS CSCD 2019年第4期446-453,共8页
Background: Adhesion, biofilm formation, yeast-hyphal transition, secretion of enzymes, and hemolytic activity are all considered important factors in Candida tropicalis infection. However, DNA sequence data for this ... Background: Adhesion, biofilm formation, yeast-hyphal transition, secretion of enzymes, and hemolytic activity are all considered important factors in Candida tropicalis infection. However, DNA sequence data for this pathogen are limited. In this study, the polymorphism and heterogeneity of genes agglutinin-like sequences (ALS)2, Lipase (LIP)1, LIP4, and secretory aspartyl proteinase tropicalis (SAPT)1-4 as well as the relationship between phenotype and genotype were analyzed. Methods: This study started in August 2013, and ended in July 2017. The complete length of ALS2, LIP1, LIP4, and SAPT1-4 of 68 clinical C. tropicalis isolates was sequenced. Single nucleotide polymorphisms (SNPs) as well as insertions and deletions (indels) were identified within these genes. In addition, phenotypic characteristics of the virulent factors, including adhesion and the secretion of aspartyl proteinases and phospholipases, were determined. Results: There were 73, 24, 17, 16, 13, and 180 SNPs in the genes LIP1, LIP4, SAPT1, SAPT2, SAPT3, and SAPT4, respectively. Furthermore, 209 SNPs were identified in total for the gene ALS2. Interestingly, large fragment deletions and insertions were also found in ALS2. Isolate FXCT 01 obtained from blood had deletions on all 4 sites and showed the lowest adhesion ability on the polymethylpentene surface. In addition, isolates with deletions in the regions 1697 to 1925 and 2073 to 2272 bp displayed relatively low abilities for adhesion and biofilm formation, and this phenotype correlated with the deletions found in ALS2. LIP1, SAPT4, and ALS2 displayed great heterogeneity among the isolates. Large deletions found in gene ALS2 appeared to be associated with the low ability of adhesion and biofilm formation of C. tropicalis. Conclusion: This study might be useful for deeper explorations of gene function and studying the virulent mechanisms of C. tropicalis. 展开更多
关键词 CANDIDA TROPICALIS Virulence-related GENES PHYLOGENETIC analysis GENE ALS GENE LIP GENE SAP
Topological evolution of coexpression networks by new gene integration maintains the hierarchical and modular structures in human ancestors
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作者 Jian Zu Yuexi Gu +6 位作者 Yu Li Chentong Li Wenyu Zhang Yong E.Zhang UnJin Lee Li Zhang Manyuan Long 《中国科学:生命科学英文版》 SCIE CAS CSCD 2019年第4期594-608,共15页
We analyze the global structure and evolution of human gene coexpression networks driven by new gene integration.When the Pearson correlation coefficient is greater than or equal to 0.5,we find that the coexpression n... We analyze the global structure and evolution of human gene coexpression networks driven by new gene integration.When the Pearson correlation coefficient is greater than or equal to 0.5,we find that the coexpression network consists of 334 small components and one "giant" connected subnet comprising of 6317 interacting genes.This network shows the properties of power-law degree distribution and small-world.The average clustering coefficient of younger genes is larger than that of the elderly genes(0.6685 vs.0.5762).Particularly,we find that the younger genes with a larger degree also show a property of hierarchical architecture.The younger genes play an important role in the overall pivotability of the network and this network contains few redundant duplicate genes.Moreover,we find that gene duplication and orphan genes are two dominant evolutionary forces in shaping this network.Both the duplicate genes and orphan genes develop new links through a "rich-gets-richer"mechanism.With the gradual integration of new genes into the ancestral network,most of the topological structure features of the network would gradually increase.However,the exponent of degree distribution and modularity coefficient of the whole network do not change significantly,which implies that the evolution of coexpression networks maintains the hierarchical and modular structures in human ancestors. 展开更多
关键词 NETWORK biology GENE NETWORK EVOLUTION SCALE-FREE NETWORK natural selection GENE expression self-organization gene DUPLICATION
体育活动与心理健康状况关系的基因假说 预览
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作者 艾水 梁琴 《四川文理学院学报》 2019年第3期126-132,共7页
体育活动与心理健康水平之间存在着显著的相关关系,以至于绝大多数研究都认为体育活动是促进心理健康水平的重要原因。然而,近期生物遗传学尤其是双生子的研究认为:体育活动对心理健康的影响可能是由于被试的基因型决定的,提出了两种影... 体育活动与心理健康水平之间存在着显著的相关关系,以至于绝大多数研究都认为体育活动是促进心理健康水平的重要原因。然而,近期生物遗传学尤其是双生子的研究认为:体育活动对心理健康的影响可能是由于被试的基因型决定的,提出了两种影响二者间关系的机制,即基因的多效性和基因与体育活动的交互作用,那些影响体育活动的基因和影响心理健康水平的基因可能存在着部分重合。 展开更多
关键词 体育活动 基因 心理健康 基因多效性 基因-体育活动交互作用
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钴基高温合金专利技术分析 预览
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作者 郭洁琼 杨夏琼 +1 位作者 田恩华 王慧萍 《河南科技》 2019年第21期53-55,共3页
本文以钴基高温合金专利技术为分析对象,重点分析国内外钴基高温合金专利技术的申请信息、早期专利、重要申请人以及技术发展情况,帮助国内相关企业更好地利用专利信息,提高国内钴基高温合金企业的竞争力。
关键词 钴基高温合金 GENE SIEI UNAC 专利分析
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关于基因编辑的伦理反思 预览
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作者 孙伟平 戴益斌 《重庆大学学报:社会科学版》 CSSCI 北大核心 2019年第4期1-9,共9页
基因编辑是一项新兴的复杂的前沿科学技术,它如果得到安全、合理的利用,无疑具有重要的积极效应;但关键是它目前并不成熟,在缺乏严格的科学评估、安全性存在不可预知风险的情况下,贸然使用可能导致人类基因谱系发生改变等问题,甚至带来... 基因编辑是一项新兴的复杂的前沿科学技术,它如果得到安全、合理的利用,无疑具有重要的积极效应;但关键是它目前并不成熟,在缺乏严格的科学评估、安全性存在不可预知风险的情况下,贸然使用可能导致人类基因谱系发生改变等问题,甚至带来难以预料的灾难性后果。即使今后基因编辑技术成熟了,如何合理地运用它,而不偏离正确的轨道,也需要更审慎地进行伦理反思,努力形成基本的伦理共识。为了促进基因编辑技术的健康发展,令其更好地兴利除弊,为人类造福,基因编辑技术的研究、应用必须遵循人本原则、公正原则、公开透明原则、知情同意原则、责任原则等基本的伦理原则。 展开更多
关键词 基因 基因编辑 伦理反思 伦理后果 伦理原则 科学伦理
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基于聚类分析的肺癌与基因相关关系研究 预览
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作者 任雪菁 安新颖 范少萍 《中华医学图书情报杂志》 CAS 2019年第6期9-16,共8页
目的:研究与不同类型肺癌存在关联的基因及其与肺癌的关联,为肺癌相关基因领域的研究学者提供参考。方法:通过对肺癌、基因进行命名实体识别、实体数据的标准化处理、肺癌-基因矩阵构建、肺癌-基因矩阵的聚类分析、文献回溯等,基于聚类... 目的:研究与不同类型肺癌存在关联的基因及其与肺癌的关联,为肺癌相关基因领域的研究学者提供参考。方法:通过对肺癌、基因进行命名实体识别、实体数据的标准化处理、肺癌-基因矩阵构建、肺癌-基因矩阵的聚类分析、文献回溯等,基于聚类的方法发现不同类型肺癌存在关联的基因及其在肺癌不同阶段的具体关联。结果:利用聚类分析的方法将肺癌大致分为A549 lung cancer,Advanced non-small-cell lung cancer,small cell lung carcinoma四大类。高频基因主要是EGFR(在晚期非小细胞肺癌患者体内突变率较高)、P53(主要在NSCLC晩期患者中高水平突变表达)、KRAS(主要与NSCLC有关)。结论:基因、蛋白质、化学物质等实体对肺癌的产生与治疗至关重要。深入探究肺癌与基因的关系对肺癌的预防、诊断、治疗均有重要意义。 展开更多
关键词 肺癌 基因 文本挖掘 数据挖掘 疾病-基因矩阵 聚类分析
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龙岩市239株沙门菌毒力基因检测结果分析 预览
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作者 曹春远 陈前进 +3 位作者 陈小东 钟叶平 李美华 陈海滨 《中国人兽共患病学报》 CAS CSCD 北大核心 2019年第8期720-725,731共7页
目的了解龙岩市沙门菌毒力基因携带与变迁情况,为沙门菌病的防制提供理论依据。方法 对1991-2017年间收集的分离自人体与食品样本的239株沙门菌进行复核鉴定,并用PCR方法检测 invA、sopB、sifA、sscA、sseE、spvB、spvC、spvR、pefA 等... 目的了解龙岩市沙门菌毒力基因携带与变迁情况,为沙门菌病的防制提供理论依据。方法 对1991-2017年间收集的分离自人体与食品样本的239株沙门菌进行复核鉴定,并用PCR方法检测 invA、sopB、sifA、sscA、sseE、spvB、spvC、spvR、pefA 等9个沙门菌毒力基因的片段。结果 龙岩市沙门菌以肠炎沙门菌和鼠伤寒沙门菌为主,占62.3%(149/239),属于SPI1的 invA、sopB 毒力基因检出率为100%,属于SPI2的 sseE、sscA、sifA 毒力基因的检出率分别为99.2%、95.0%、85.4%,毒力质粒基因 spvC 检出率71.1%, pefA、spvB、spvR 检出率均为46.4%。并且其携带数量也随着时间的进程而显著增加;肠炎沙门菌质粒毒力基因携带率显著高于鼠伤寒沙门菌。肠炎沙门菌以检出全部9种毒力基因为主,占83.5%(76/91);鼠伤寒沙门菌以 invA、sopB、sseE、sscA、sifA阳性,spvB、spvR、pefA 阴性结果多见,占77.6%(45/58)。人体与食品样本来源的沙门菌所携带毒力基因数量没有差异。结论 龙岩市沙门菌携带毒力基因数量较多,毒力较强,质粒毒力基因随着时间的进程而累积,人源性与食源性沙门菌交叉污染严重,必须加强人、禽、畜沙门菌病的监测与管理。 展开更多
关键词 毒力 基因 沙门菌毒力岛 沙门菌质粒毒力基因 血清型 携带 变迁
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维生素D受体基因多态性与骨质疏松症相关性的研究进展 预览
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作者 李明 李宁宁 《右江医学》 2019年第4期245-249,共5页
骨质疏松症的发生是遗传因素和环境因素共同作用的结果,其终末阶段是骨质疏松性骨折。随着分子生物学的发展和疾病遗传学的深入研究,骨质疏松症相关基因的多态性成为目前研究的热点。维生素D受体基因是目前研究最多也是最有争议的基因... 骨质疏松症的发生是遗传因素和环境因素共同作用的结果,其终末阶段是骨质疏松性骨折。随着分子生物学的发展和疾病遗传学的深入研究,骨质疏松症相关基因的多态性成为目前研究的热点。维生素D受体基因是目前研究最多也是最有争议的基因。在复习大量相关文献的基础上,该文就维生素D受体基因多态性与骨质疏松症的关系予以综述。 展开更多
关键词 骨质疏松症 基因 多态性 维生素D受体基因
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