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负载骨形态发生蛋白2水凝胶诱导牙髓干细胞的成骨分化
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作者 伊斯拉尔古丽·麦麦提 贾森 刘佳 《中国组织工程研究》 CAS 北大核心 2025年第16期3301-3310,共10页
背景:前期研究证明,甲基丙烯酸酐改性明胶/经处理牙本质基质复合水凝胶支架可促进人牙髓干细胞的增殖及分化。水凝胶负载骨形态发生蛋白2被认为是骨修复中有前景的材料。目的:观察负载不同质量浓度骨形态发生蛋白2的甲基丙烯酸酐改性明... 背景:前期研究证明,甲基丙烯酸酐改性明胶/经处理牙本质基质复合水凝胶支架可促进人牙髓干细胞的增殖及分化。水凝胶负载骨形态发生蛋白2被认为是骨修复中有前景的材料。目的:观察负载不同质量浓度骨形态发生蛋白2的甲基丙烯酸酐改性明胶/经处理牙本质基质复合水凝胶对人牙髓干细胞成骨向分化的诱导作用。方法:制备含0,50,100,200μg/mL骨形态发生蛋白2的甲基丙烯酸酐改性明胶/经处理牙本质基质复合水凝胶,分别记为GelMA/TDM、BMP-2(50 ng/mL)GelMA/TDM、BMP-2(100 ng/mL)GelMA/TDM、BMP-2(200 ng/mL)GelMA/TDM,检测复合水凝胶对骨形态发生蛋白2的体外缓释性能。采用改良组织块酶消化法提取人牙髓干细胞,分别接种于4种水凝胶表面,采用CCK-8法检测细胞增殖,DAPI染色检测细胞黏附;对各组水凝胶表面的人牙髓干细胞进行成骨诱导,进行碱性磷酸酶染色、碱性磷酸酶活性检测与茜素红染色,采用RT-PCR法检测相关成骨基因(Runx2、骨形态发生蛋白2、骨桥蛋白、骨钙素、Ⅰ型胶原)表达。结果与结论:①甲基丙烯酸酐改性明胶/经处理牙本质基质复合水凝胶可持续释放骨形态发生蛋白2长达21 d,在第3-6天释放较快,第6天之后释放趋于平稳;②4种水凝胶均可促进人牙髓干细胞的增殖,其中以BMP-2(100 ng/mL)-GelMA/TDM复合水凝胶的作用最明显;相较于GelMA/TDM复合水凝胶,BMP-2-GelMA/TDM复合水凝胶可促进人牙髓干细胞的黏附,其中以BMP-2(200 ng/mL)-GelMA/TDM复合水凝胶的作用最明显;③相较于GelMA/TDM复合水凝胶,BMP-2-GelMA/TDM复合水凝胶可提升碱性磷酸酶活性、钙结节含量与相关成骨基因表达,综合分析显示BMP-2(100 ng/mL)-GelMA/TDM复合水凝胶的作用更明显;④结果表明,BMP-2(100 ng/mL)-GelMA/TDM复合水凝胶促进牙髓干细胞成骨向分化的能力更明显。 展开更多
关键词 人牙髓干细胞 骨形态形成蛋白2 细胞增殖 细胞分化 组织工程 牙髓-牙本质再生
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Influence of Tanshinone lla on heat shock protein 70,Bcl-2 and Bax expression in rats with spinal ischemia/reperfusion injury 被引量:9
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作者 Li Zhang Weidong Gan Guoyao An 《Neural Regeneration Research》 SCIE CAS CSCD 2012年第36期2882-2888,共7页
Tanshinone lla is an effective monomer component of Danshen, which is a traditional Chinese medicine for activating blood circulation to dissipate blood stasis. Tanshinone Ila can effectively improve brain tissue isch... Tanshinone lla is an effective monomer component of Danshen, which is a traditional Chinese medicine for activating blood circulation to dissipate blood stasis. Tanshinone Ila can effectively improve brain tissue ischemia/hypoxia injury. The present study established a rat model of spinal cord ischemia/reperfusion injury and intraperitoneally injected Tanshinone lla, 0.5 hour prior to model establishment. Results showed that Tanshinone Ila promoted heat shock protein 70 and Bcl-2 protein expression, but inhibited Bax protein expression in the injured spinal cord after ischemia/reperfusion injury. Furthermore, Nissl staining indicated a reduction in nerve cell apoptosis and fewer pathological lesions in the presence of Tanshinone Ila, compared with positive control Danshen injection. 展开更多
关键词 Tanshinone Ila DANSHEN spinal ischemia/reperfusion injury heat shock protein 70 BCL-2 BAX cellapoptosis Chinese medicine neural regeneration
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Chronic stress causes protein kinase C epsilon-aldehyde dehydrogenase 2 signaling pathway perturbation in the rat hippocampus and prefrontal cortex,but not in the myocardium 被引量:4
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作者 Wen-Yuan Zhang Ke-Yi Wang +2 位作者 Yun-Jing Li Ying-Ran Li Rong-Zhi Lu 《Neural Regeneration Research》 SCIE CAS CSCD 2018年第7期1225-1230,共6页
Chronic stress is strongly associated with the occurrence and development of depression and cardiovascular disease.Stress can induce altered mitochondrial function and activation of apoptosis in the cardio-cerebral sy... Chronic stress is strongly associated with the occurrence and development of depression and cardiovascular disease.Stress can induce altered mitochondrial function and activation of apoptosis in the cardio-cerebral system.However,it is unknown whether the protein kinase C ε(PKCε)-aldehyde dehydrogenase 2(ALDH2) pathway is altered under chronic stress,and this study sought to address this question.A rat model of depression was established using a chronic unpredictable mild stress(CUMS) protocol.After experiencing CUMS for 4 weeks,the sucrose preference test and the forced swim test verified depressive-like behaviors.Enzyme linked immunosorbent assays showed that ALDH2 activity was decreased in the rat hippocampus and prefrontal cortex,but was not altered in the myocardium.Western blot assays demonstrated reduced levels of ALDH2 and PKCε,but increased levels of 4-hydroxy-2-nonenal(4 HNE) adducts.Caspase-3 expression did not obviously alter,but active forms of caspase-3 were increased in the hippocampus and prefrontal cortex.In the myocardium,expression of ALDH2,PKCε and 4 HNE adducts did not remarkably alter;while caspase-3 expression was reduced and the active forms of caspase-3 were upregulated.Pearson's correlation test demonstrated that expression of 4 HNE adducts was positively correlated with levels of the active forms of caspase-3 in the hippocampus and prefrontal cortex,but not in the myocardium.In conclusion,chronic stress can damage the PKCε-ALDH2 signaling pathway in the hippocampus and prefrontal cortex,but not in the myocardium.Moreover,4 HNE is associated with active forms of caspase-3 in the hippocampus and prefrontal cortex. 展开更多
关键词 nerve regeneration stress depression protein kinase C ε aldehyde dehydrogenase 2 4-hydroxy-2-nonenal apoptosis hippocampus prefrontal cortex myocardium neural regeneration
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Pretreatment with low-frequency repetitive transcranial magnetic stimulation may influence neuronal Bcl-2 and Fas protein expression in the CA1 region of the hippocampus: A possible anti-epilepsy mechanism in a lithium-pilocarpine-induced epileptic rat mod 被引量:2
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作者 Sha Ke Hongning Zhao +6 位作者 Xiaoming Wang Junqiang Zhang Fang Chen Yuanxu Wang Xiaoqiong Zhao Hui Huang Jianxiu Hu 《Neural Regeneration Research》 SCIE CAS CSCD 2010年第12期895-900,共6页
BAOKGROUND: Bcl-2 and Fas proteins are well known as anti-apoptotic and pro-apoptotic factors respectively. However, whether the anti-epileptic mechanism of low-frequency repetitive transcranial magnetic stimulation ... BAOKGROUND: Bcl-2 and Fas proteins are well known as anti-apoptotic and pro-apoptotic factors respectively. However, whether the anti-epileptic mechanism of low-frequency repetitive transcranial magnetic stimulation (rTMS) involves an anti-apoptotic effect via regulating Bcl-2 and Fas protein expression remains to be determined. OBJECTIVE: To verify the correlation between the anti-epileptic mechanism following pretreatment of low-frequency rTMS and anti-hippocampal apoptosis. DESIGN, TIME AND SETTING: A randomized controlled animal experiment was performed at Institute of Neurological Disorders, Affiliated Hospital of North Sichuan Medical College between September 2007 and March 2008. MATERIALS: Pilocarpine (053K13011) was provided by Sigma, USA; lithium was provided by Shanghai Biotechnology Co., Ltd., China; Dantec Maglite-r25 rTMS instrument was provided by Dundee, Denmark. METHODS: A total of 21 adult male Wistar rats were randomly divided into control (n = 6), rTMS pretreatment (n = 9), and sham-stimulation (n = 6) groups. The rTMS pretreatment group was pretreated with low-frequency rTMS (0.5 Hz, 75% threshold intensity, 20 times/bundle, and 5 bundles/day), while the sham-stimulation group was sham-stimulated with a similar sound for 7 successive days to establish lithium-pilocarpine-induced epileptic state models. MAIN OUTCOME MEASURES: Epileptic stroke latency; neuronal morphology was observed using hematoxylin and eosin staining; mean positive-reactive cell number and mean absorbance of Bcl-2 and Fas protein in the hippocampal CA1 region was observed using immunohistochemistry. RESULTS: Epileptic latency in the rTMS pretreatment group was significantly enhanced (P 〈 0.01), and a number of degenerated neurons were observed to be apoptotic. Bcl-2 protein expression increased at each time point, but Fas protein expression decreased (P 〈 0.01). CONCLUSION: Low-frequency rTMS has an anti-epileptic effect, which may be via regulation of Bcl-2 and Fas protein expression in the hippocampal region. 展开更多
关键词 transcranial magnetic stimulation epileptic state Bcl-2 protein Fas protein brain injury neural regeneration
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Is X-linked methyl-CpG binding protein 2 a new target for the treatment of Parkinson's disease? 被引量:1
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作者 Teng Xie Jie Zhang +4 位作者 Xianhou Yuan Jing Yang Wei Ding Xin Huang Yong Wu 《Neural Regeneration Research》 SCIE CAS CSCD 2013年第21期1948-1957,共10页
X-linked methyl-CpG binding protein 2 mutations can induce symptoms similar to those of Parkinson’s disease and dopamine metabolism disorders, but the specific role of X-linked methyl-CpG binding protein 2 in the pat... X-linked methyl-CpG binding protein 2 mutations can induce symptoms similar to those of Parkinson’s disease and dopamine metabolism disorders, but the specific role of X-linked methyl-CpG binding protein 2 in the pathogenesis of Parkinson’s disease remains unknown. In the present study, we used 6-hydroxydopamine-induced human neuroblastoma cell (SH-SY5Y cells) injury as a cell model of Parkinson’s disease. The 6-hydroxydopamine (50 μmol/L) treatment decreased protein levels for both X-linked methyl-CpG binding protein 2 and tyrosine hydroxylase in these cells, and led to cell death. However, overexpression of X-linked methyl-CpG binding protein 2 was able to ameliorate the effects of 6-hydroxydopamine, it reduced 6-hydroxydopamine-induced apoptosis, and increased the levels of tyrosine hydroxylase in SH-SY5Y cells. These findings suggesting that X-linked methyl-CpG binding protein 2 may be a potential therapeutic target for the treatment of Parkinson’s disease. 展开更多
关键词 neural regeneration neurodegenerative diseases Parkinson’s disease methyl-CpG-binding protein 2 tyrosine hydroxylase 6-HYDROXYDOPAMINE dopaminergic neurons SH-SY5Y cells grants-supported paper NEUROregenerATION
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Drilling Combined with Adipose-derived Stem Cells and Bone Morphogenetic Protein-2 to Treat Femoral Head Epiphyseal Necrosis in Juvenile Rabbits 被引量:7
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作者 Zi-li WANG Rong-zhen HE +7 位作者 Bin TU Jin-shen HE Xu CAO Han-song XIA Hong-liang BA Song WU Cheng PENG Kun XIONG 《Current Medical Science》 SCIE CAS 2018年第2期277-288,共12页
This study was designed to evaluate the effects of drilling through the growth plate and using adipose-derived stem cells (ADSCs) and bone morphogenetic protein-2 (BMP-2) to treat femoral head epiphyseal ischemic ... This study was designed to evaluate the effects of drilling through the growth plate and using adipose-derived stem cells (ADSCs) and bone morphogenetic protein-2 (BMP-2) to treat femoral head epiphyseal ischemic necrosis, which can be done in juvenile rabbits. Passagefour bromodeoxyuridine (BrdU)-labeled ADSCs were cultured, assayed with MTT to determine their viability and stained with alizarin red dye to determine their osteogenic ability. Twomonth-old, healthy male rabbits (1.2 to 1.4 kg, n=45) underwent ischemic induction and were randomly divided into five groups (group A: animal model control; group B: drilling; group C: drilling & ADSCs; group D: drilling & BMP-2; and group E: drilling & ADSCs & BMP-2). Magnetic resonance imaging (MRI), X-ray imaging, hematoxylin and eosin staining and BrdU immunofluorescence detection were applied 4, 6 and 10 weeks after treatment. Approximately 90% of the ADSCs were labeled with BrdU and showed good viability and osteogenic ability. Similar results were observed in the rabbits in groups C and E at weeks 6 and 10. The animals of groups C and E demonstrated normal hip structure and improved femoral epiphyseal quotients and trabecular areas compared with those of the groups A and B (P〈0.01). Group D demonstrated improved femoral epiphyseal quotients and trabecular areas compared with those of groups A and B (P〈0.05). In summary, drilling through the growth plate combined with ADSC and BMP-2 treatments induced new bone formation and protected the femoral head epiphysis from collapsing in a juvenile rabbit model of femoral head epiphyseal ischemic necrosis. 展开更多
关键词 adipose-derived stem cells bone morphogenetic protein-2 bone regeneration DRILLING Perthes' disease
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Collapsin response mediator protein-2 plays a major protective role in acute axonal degeneration 被引量:5
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作者 Jian-Nan Zhang Jan C.Koch 《Neural Regeneration Research》 SCIE CAS CSCD 2017年第5期692-695,共4页
Axonal degeneration is a key pathological feature in many neurological diseases. It often leads to persistent deficits due to the inability of axons to regenerate in the central nervous system. Therefore therapeutic a... Axonal degeneration is a key pathological feature in many neurological diseases. It often leads to persistent deficits due to the inability of axons to regenerate in the central nervous system. Therefore therapeutic approaches should optimally both attenuate axonal degeneration and foster axonal regeneration. Compelling evidence suggests that collapsin response mediator protein-2(CRMP2) might be a molecular target fulfilling these requirements. In this mini-review, we give a compact overview of the known functions of CRMP2 and its molecular interactors in neurite outgrowth and in neurodegenerative conditions. Moreover, we discuss in detail our recent findings on the role of CRMP2 in acute axonal degeneration in the optic nerve. We found that the calcium influx induced by the lesion activates the protease calpain which cleaves CRMP2, leading to impairment of axonal transport. Both calpain inhibition and CRMP2 overexpression effectively protected the proximal axons against acute axonal degeneration. Taken together, CRMP2 is further characterized as a central molecular player in acute axonal degeneration and thus evolves as a promising therapeutic target to both counteract axonal degeneration and foster axonal regeneration in neurodegenerative and neurotraumatic diseases. 展开更多
关键词 collapsin response mediator protein-2 CRMP2 axonal regeneration optic nerve cruch axonaldegeneration CALPAIN axonal transport
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Specific effects of c-Jun NH2-terminal kinaseinteracting protein 1 in neuronal axons 被引量:1
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作者 Shu Tang Qiang Wen +1 位作者 Xiao-jian Zhang Quan-cheng Kan 《Neural Regeneration Research》 SCIE CAS CSCD 2016年第1期114-118,共5页
c-Jun NH2-terminal kinase(JNK)-interacting protein 3 plays an important role in brain-derived neurotrophic factor/tropomyosin-related kinase B(Trk B) anterograde axonal transport. It remains unclear whether JNK-in... c-Jun NH2-terminal kinase(JNK)-interacting protein 3 plays an important role in brain-derived neurotrophic factor/tropomyosin-related kinase B(Trk B) anterograde axonal transport. It remains unclear whether JNK-interacting protein 1 mediates similar effects, or whether JNK-interacting protein 1 affects the regulation of Trk B anterograde axonal transport. In this study, we isolated rat embryonic hippocampus and cultured hippocampal neurons in vitro. Coimmunoprecipitation results demonstrated that JNK-interacting protein 1 formed Trk B complexes in vitro and in vivo. Immunocytochemistry results showed that when JNK-interacting protein 1 was highly expressed, the distribution of Trk B gradually increased in axon terminals. However, the distribution of Trk B reduced in axon terminals after knocking out JNK-interacting protein 1. In addition, there were differences in distribution of Trk B after JNK-interacting protein 1 was knocked out compared with not. However, knockout of JNK-interacting protein 1 did not affect the distribution of Trk B in dendrites. These findings confirm that JNK-interacting protein 1 can interact with Trk B in neuronal cells, and can regulate the transport of Trk B in axons, but not in dendrites. 展开更多
关键词 nerve regeneration c-Jun NH2-terminal kinase-interacting protein neurons brain-derived neurotrophic factor tropomyosin-related kinase B axons hippocampus dendrites regulation neural regeneration
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Influence of acupuncture with exercise training on learning and memory functions, as well as microtubule-associated protein-2 and synaptophysin expression in the hippocampal CA3 region, in a rat model of cerebral infarction 被引量:4
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作者 Wei Jiang Liubing Li +5 位作者 Min Yang Yanzhen Bi Kehui Hu Peng Zhang Yixin Shen Qian Yu 《Neural Regeneration Research》 SCIE CAS CSCD 2011年第27期2124-2128,共5页
The present study was designed to determine microtubule-associated protein-2 and synaptophysin expression in the hippocampal CA3 region in a rat model of middle cerebral artery occlusion. The rats were treated with ac... The present study was designed to determine microtubule-associated protein-2 and synaptophysin expression in the hippocampal CA3 region in a rat model of middle cerebral artery occlusion. The rats were treated with acupuncture at Baihui (GV 20), Qubin (GB 7), and Qianding (GV 21) points, in addition to exercise training. Results were compared with rats undergoing exercise training only. The Y-maze method and immunohistochemistry revealed decreased error frequency of passing through Y-maze, as well as significantly increased microtubule-associated protein-2 and synaptophysin expression, in the acupuncture with exercise training group compared with the model and exercise training groups after 5 weeks. Microtubule-associated protein-2 and synaptophysin expressions negatively correlated with error frequency of passing through the Y-maze. These results suggested that acupuncture combined with exercise training improved learning and memory functions in a rat model of cerebral infarction. The mechanisms of action were hypothesized to be associated with dendritic or synaptic plasticity in the ipsilateral hippocampal CA3 region. 展开更多
关键词 acupuncture cerebral infarction exercise learning memory microtubule-associated protein-2 synaptophysin neural regeneration
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Association of hepatocyte-derived growth factor receptor/caudal type homeobox 2 co-expression with mucosal regeneration in active ulcerative colitis 被引量:2
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作者 Ferenc Sipos Miklós Constantinovits +2 位作者 Gábor Valcz Zsolt Tulassay Gy?rgyi M?zes 《World Journal of Gastroenterology》 SCIE CAS 2015年第28期8569-8579,共11页
AIM:To characterize the regeneration-associated stem cell-related phenotype of hepatocyte-derived growth factor receptor(HGFR)-expressing cells in active ulcerative colitis(UC).METHODS:On the whole 38 peripheral blood... AIM:To characterize the regeneration-associated stem cell-related phenotype of hepatocyte-derived growth factor receptor(HGFR)-expressing cells in active ulcerative colitis(UC).METHODS:On the whole 38 peripheral blood samples and 38 colonic biopsy samples from 18 patients with histologically proven active UC and 20 healthy control subjects were collected.After preparing tissue microarrays and blood smears HGFR,caudal type homeobox 2(CDX2),prominin-1(CD133) and Musashi-1conventional and double fluorescent immunolabelings were performed.Immunostained samples were digitalized using high-resolution Mirax Desk instrument,and analyzed with the Mirax TMA Module software.For semiquantitative counting of immunopositive lamina propria(LP) cells 5 fields of view were counted at magnification x 200 in each sample core,then mean ± SD were determined.In case of peripheral blood smears,30 fields of view with 100 μm diameter were evaluated in every sample and the number of immunopositive cells(mean ± SD) was determined.Using 337 nm UVA Laser MicroDissection system at least 5000 subepithelial cells from the lamina propria were collected.Gene expression analysis of HGFR,CDX2,CD133,leucine-rich repeat-containing G-protein coupled receptor 5(Lgr5),Musashi-1 and cytokeratin20(CK20) were performed in both laser-microdisscted samples and blood samples by using real time reverse transcription polymerase chain reaction(RT-PCR).RESULTS:By performing conventional and double fluorescent immunolabelings confirmed by RT-PCR,higher number of HGFR(blood:6.7 ± 1.22 vs 38.5 ±3.18;LP:2.25 ± 0.85 vs 9.22 ± 0.65;P < 0.05),CDX2(blood:0 vs 0.94 ± 0.64;LP:0.75 ± 0.55 vs 2.11± 0.75;P < 0.05),CD133(blood:1.1 ± 0.72 vs 8.3± 1.08;LP:11.1 ± 0.85 vs 26.28 ± 1.71;P < 0.05)and Musashi-1(blood and LP:0 vs scattered) positive cells were detected in blood and lamina propria of UC samples as compared to controls.HGFR/CDX2(blood:0 vs 1± 0.59;LP:0.8 ± 0.69 vs 2.06 ± 0.72,P < 0.05)and Musashi-1/CDX2(blood and LP:0 vs scattered) coexpressions were found in blood and lamina propria of UC samples.HGFR/CD133 and CD133/CDX2 coexpressions appeared only in UC lamina propria samples.CDX2,Lgr5 and Musashi-1 expressions in UC blood samples were not accompanied by CK20 mRNA expression.CONCLUSION:In active UC,a portion of circulating HGFR-expressing cells are committed to the epithelial lineage,and may participate in mucosal regeneration by undergoing mesenchymal-to-epithelial transition. 展开更多
关键词 Hepatocyte-derived growth factor RECEPTOR CAUDAL type HOMEOBOX 2 CD133 Musashi-1 Leucinerichrepeat-containing G-protein coupled RECEPTOR 5 Ulcerative colitis regenerATION
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Synthesis and Characterization of UPPE-PLGA-rhBMP2 Scaffolds for Bone Regeneration 被引量:1
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作者 田志超 朱元莉 +5 位作者 邱进俊 关邯峰 李亮宇 郑守超 董学海 肖骏 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2012年第4期563-570,共8页
A novel unsaturated polyphosphoester(UPPE) was devised in our previous research,which is a kind of promising scaffold for improving bone regeneration.However,the polymerization process of UPPE scaffolds was unfavorabl... A novel unsaturated polyphosphoester(UPPE) was devised in our previous research,which is a kind of promising scaffold for improving bone regeneration.However,the polymerization process of UPPE scaffolds was unfavorable,which may adversely affect the bioactivity of osteoinductive molecules added if necessary,such as recombinant human bone morphogenetic protein-2(rhBMP2).The purpose of this study was to build a kind of optimal scaffold named UPPE-PLGA-rhBMP2(UPB) and to investigate the bioactivity of rhBMP2 in this scaffold.Furthermore,the cytotoxicity and biocompatibility of UPB scaffold was assessed in vitro.A W1/O/W2 method was used to fabricate PLGA-rhBMP2 microspheres,and then the microspheres were added to UPPE for synthesizing UPB scaffold.The morphological characters of PLGA-rhBMP2 microspheres and UPB scaffolds were observed under the scanning electron microscopy and laser scanning confocal microscopy.The cumulative release of UPB scaffolds was detected by using ELISA.The cytotoxicity and biocompatibility of UPB scaffolds were evaluated through examining the adsorption and apoptosis of bone marrow stromal cells(bMSCs) seeded on the surface of UPB scaffolds.The bioactivity of rhBMP2 in UPB scaffolds was assessed through measuring the alkaline phosphates(ALP) activity in bMSCs seeded.The results showed that UPB scaffolds sequentially exhibited burst and sustained release of rhBMP2.The cytotoxicity was greatly reduced when the scaffolds were immersed in buffer solution for 2 h.bMSCs attached and grew on the surface of soaked UPB scaffolds,exerting well biocompatibility.The ALP activity of bMSCs seeded was significantly enhanced,indicating that the bioactivity of rhBMP2 remained and still took effect after the unfavorable polymerization process of scaffolds.It was concluded that UPB scaffolds have low cytotoxicity,good biocompatibility and preserve bioactivity of rhBMP2.UPB scaffolds are promising in improving bone regeneration. 展开更多
关键词 poly(lactic-co-glycolic acid) microspheres bone morphogenetic protein-2 unsaturated polyphosphoester bone regeneration
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Bone Regeneration Enhanced by Antigen-Extracted Xenogeneic Cancellous Bone Graft with rhBMP-2 in Rabbits Mandibular Defect Repair 被引量:3
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作者 Renfa Lai Zejian Li +1 位作者 Ye Zhang Zhiying Zhou 《Engineering(科研)》 2013年第10期108-113,共6页
The effects of large piece xenogeneic bone which was separated from healthy pigs as a scaffold on repair of mandibular defect was investigated and the applicability of antigen-extracted xenogeneic cancellous bone (AXC... The effects of large piece xenogeneic bone which was separated from healthy pigs as a scaffold on repair of mandibular defect was investigated and the applicability of antigen-extracted xenogeneic cancellous bone (AXCB) soaked with rhBMP-2 in bone defect repair was assessed. Mandibular defects were created in 48 New Zealand Rabbits, and then randomly divided into 4 groups, which was grafted in the mandibular defects with AXCB, AXCB soaked with rhBMP-2, autograft bone, or blank. Equal number of animals from each group was classified into three time points (4, 8, and 12 weeks) after operation for gross pathological observation, hematoxylin and eosin (H & E) staining, radiographic examination, and bone density measurement. H & E staining revealed that the area percentage of bone regeneration in the group of AXCB/rhBMP-2 graft was 27.72 ± 4.68, 53.90 ± 21.92, and 77.35 ± 9.83 when at 4, 8, and 12 weeks, which was better than that of auto bone graft, prompting that the group of AXCB/rhBMP-2 graft had commendable osteogenic effect. And comparing with the AXCB without rhBMP-2, of which the area percentage of bone regeneration was only 14.03 ± 5.02, 28.49 ± 11.35, and 53.90 ± 21.92, the osteogenic effect of AXCB/rhBMP-2 graft was demonstrated to be much better. In the group of AXCB/rhBMP-2 graft, the area percentage of bone regeneration increased, and the implanted materials were gradually degraded and replaced by autogenous bone regeneration over time. We concluded that antigen-extracted xenogeneic cancellous bone (AXCB) graft soaked with rhBMP-2 had shown excellent osteogenic effect in repair of bone defects, with good biocompability. 展开更多
关键词 Recombinant Human BONE Morphogenetic protein-2(rhBMP-2) Antigen-Extracted Xenogeneic CANCELLOUS BONE (AXCB) DEFECT Repair BONE regeneration Mandible DEFECT
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Granulocyte colony-stimulating factor promotes growth of processes,growth associated protein 43 and microtubule-associated protein 2 expression in cultured rat retinal ganglion cells in vitro
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作者 Haitao Xu Yuying Jiang +4 位作者 Xiuhong Qin Lihui Si Jie Zhao Lijuan Liu Yazhen Wu 《Neural Regeneration Research》 SCIE CAS CSCD 2011年第31期2435-2440,共6页
Following granulocyte colony-stimulating factor (G-CSF) treatment,the growth of processes in cul-tured rat retinal ganglion cells (RGCs) in vitro,expression of growth associated protein 43,and expression of microt... Following granulocyte colony-stimulating factor (G-CSF) treatment,the growth of processes in cul-tured rat retinal ganglion cells (RGCs) in vitro,expression of growth associated protein 43,and expression of microtubule-associated protein 2 mRNA expression were significantly increased.In contrast,RhoA/Rock protein content was significantly reduced by G-CSF treatment.These results indicate that G-CSF promotes the growth of processes in RGCs and increases the expression of growth-associated protein 43 and microtubule-associated protein 2 mRNA by inhibiting the RhoA/Rock pathway,thereby benefiting axonal repair in RGCs exposed to hypoxia. 展开更多
关键词 granulocyte colony-stimulating factor ganglion cells growth-associated protein 43 microtubule-associated protein 2 AXONS neural regeneration
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Amyloid precursor-like protein 2 C-terminal fragments upregulate S100A9 gene and protein expression in BV2 cells
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作者 Guangzhe Li Hui Chen +3 位作者 Lin Cheng Rongjie Zhao Junchang Zhao Yanji Xu 《Neural Regeneration Research》 SCIE CAS CSCD 2014年第21期1923-1928,共6页
The murine microglial cell line BV2 has neuroprotective effects, but is toxic to neurons by secret-ing inlfammatory cytokines, and is an important target in the treatment of nerve inlfammation and neurodegenerative di... The murine microglial cell line BV2 has neuroprotective effects, but is toxic to neurons by secret-ing inlfammatory cytokines, and is an important target in the treatment of nerve inlfammation and neurodegenerative diseases. In the present study, we observed the effects of transfecting three amyloid precursor-like protein 2 (APLP2) C-terminal fragments (CTFs; C57, C50 and C31) in the pEGFP-N1 vector on S100A9 expression in BV2 cells. Reverse transcription-PCR, western blot assay and immunocytochemistry revealed that S100A9 protein and mRNA expression was greater in BV2 cells after CTF transfection than after mock transfection with an empty vector. Furthermore, transfection of full-length APLP2-751 resulted in low levels of S100A9 protein ex-pression. Our results show that APLP2-CTFs upregulate S100A9 protein and mRNA expression in BV2 cells, and identify a novel pathway involved in neuronal injury and apoptosis, and repair and protection in Alzheimer’s disease. 展开更多
关键词 nerve regeneration NEURODEGENERATION Alzheimer’s disease APLP2 S100A9 C-terminal fragments amyloid precursor protein BV2 cells Γ-SECRETASE NSFC grant neural regeneration
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骨形成蛋白-2基因促进犬牙周组织再生的体内研究 被引量:9
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作者 孙钦峰 朱雪梅 +2 位作者 杨丕山 刘玉 杜芳 《上海口腔医学》 CAS CSCD 2007年第2期211-214,共4页
目的:观察重组入骨形成蛋白-2(rhBMP-2)质粒对犬牙周骨缺损再生作用的影响。方法:选用6只成年bea犬,将其下颌两侧的第2、3、4前磨牙(P2、P3、P4)作为实验牙。在每颗实验牙的近中根颊侧制作“U”型骨缺损,并随设计为3组,即pIRES-rhBMP-2... 目的:观察重组入骨形成蛋白-2(rhBMP-2)质粒对犬牙周骨缺损再生作用的影响。方法:选用6只成年bea犬,将其下颌两侧的第2、3、4前磨牙(P2、P3、P4)作为实验牙。在每颗实验牙的近中根颊侧制作“U”型骨缺损,并随设计为3组,即pIRES-rhBMP-2组、rhBMP-2组(阳性对照组)和PBS组(空白对照组)。术后第4与第8周分别处动物。光镜下观察组织学变化,采用Image-Pro-Express系统测量新生牙槽骨和牙骨质的高度、新生结缔组织的附量。测量结果以SAS 6.12软件包进行Newman-Keuls q检验。结果:实验第8周时,组织学观察可见2个实验组新牙槽骨接近于正常骨结构,新生牙周纤维稠密,富含血管;空白对照组胶原纤维稀疏,排列不规则。新生组织测量果显示:2个实验组新生牙槽骨和牙骨质的高度、新生结缔组织的附着量较空白对照组显著增加(P<0.05,P<0.01) 2个实验组间相比无显著性差异(P>0.05)。结论:pIRES-rhBMP-2有较强的骨诱导活性,能有效促进犬牙周骨缺的组织再生。 展开更多
关键词 骨形成蛋白-2 基因治疗 骨缺损 牙周再生
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血清胰腺再生蛋白水平预测2型糖尿病及其慢性并发症发生的价值 被引量:6
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作者 李玲 杨家悦 +3 位作者 祝祥云 吴春华 何杰宇 黄灏 《中国全科医学》 CAS CSCD 北大核心 2016年第2期159-163,共5页
目的检测不同临床阶段2型糖尿病(T2DM)患者胰腺再生蛋白(Reg)水平,分析血清Reg与T2DM及其慢性并发症的关系。方法选取2012年9月—2014年12月东南大学附属中大医院及南京6个社区医院(红山、玄武、莫愁、夫子庙、中华门和徐家巷)收治的门... 目的检测不同临床阶段2型糖尿病(T2DM)患者胰腺再生蛋白(Reg)水平,分析血清Reg与T2DM及其慢性并发症的关系。方法选取2012年9月—2014年12月东南大学附属中大医院及南京6个社区医院(红山、玄武、莫愁、夫子庙、中华门和徐家巷)收治的门诊、住院患者以及健康体检者,根据诊断标准与排除标准共纳入950名参与者,将其分为5组:健康对照组(HC组,n=97)、高危人群组(HR组,n=209)、糖调节受损组(IGR组,n=292)、初发T2DM组(Onset组,n=188)和长程T2DM无并发症组(LD-无并发症组,n=94)、长程T2DM有并发症组(LD-有并发症组,n=70)。采用酶联免疫吸附法(ELISA)测定受试者清晨空腹状态下的血清Reg水平,分析Reg与T2DM病程及慢性并发症的关系。结果各组年龄、糖尿病家族史、吸烟史、收缩压比较,差异均无统计学意义(P>0.05);各组性别、体质指数(BMI)、舒张压、空腹血糖(FPG)、餐后2 h血糖(2 h PG)、糖化血红蛋白(Hb A1c)、Reg比较,差异均有统计学意义(P<0.05)。T2DM患者血清Reg水平与病程呈正相关(rs=0.284,P<0.01)。在所有受试者中血清Reg水平与Hb A1c、FPG、2 h PG呈正相关(rs=0.188、0.115、0.111,P<0.001)。Reg诊断T2DM的ROC曲线下面积为0.640〔95%CI(0.605,0.674)〕,最佳截点为25 ng/ml,其灵敏度为46%,特异度为76%,阳性似然比为1.92,阴性似然比为0.71。Reg诊断T2DM慢性并发症的ROC曲线下面积为0.754〔95%CI(0.694,0.813)〕,最佳截点为27 ng/ml,其灵敏度为65%,特异度为74%,阳性似然比为2.50,阴性似然比为0.47。结论检测血清Reg水平有助于预测T2DM及其慢性并发症,Reg将来可能成为T2DM及其进展的一种预测因子。 展开更多
关键词 糖尿病 2 胰腺再生蛋白 胰岛素分泌细胞
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骨形态发生蛋白-2基因修饰骨髓间充质干细胞复合对氧化聚乙烯和聚丙烯共聚物移植促进兔下颌骨牵张成骨的实验研究 被引量:6
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作者 周诺 黄旋平 +3 位作者 江献芳 宋继传 李华 谢庆条 《华西口腔医学杂志》 CAS CSCD 北大核心 2013年第3期247-252,共6页
目的探讨人骨形态发生蛋白-2(BMP-2)基因修饰骨髓间充质干细胞(BMSCs)复合可注射骨组织工程支架材料对氧化聚乙烯和聚丙烯共聚物(Pluronic F-127)移植对兔下颌骨牵张成骨新骨形成的促进作用。方法将48只新西兰白兔随机分为4组,每组12只... 目的探讨人骨形态发生蛋白-2(BMP-2)基因修饰骨髓间充质干细胞(BMSCs)复合可注射骨组织工程支架材料对氧化聚乙烯和聚丙烯共聚物(Pluronic F-127)移植对兔下颌骨牵张成骨新骨形成的促进作用。方法将48只新西兰白兔随机分为4组,每组12只。建立下颌骨牵张成骨动物模型,固定期第2天A组于牵张间隙注射200μLBMP-2基因修饰BMSCs与Pluronic F-127复合物;B组注射等量BMP-2基因修饰BMSCs液;C组注射等量BMSCs液;D组注射等量生理盐水。分别于固定2、6周时处死半数动物获取标本,通过X线片、组织切片及免疫组化观察骨质愈合改建情况。结果通过X线片及免疫组化观察并经过统计软件分析,在固定2周和6周时,A组牵张区内骨密度和BMP-2蛋白的表达明显高于B、C、D组(P<0.01),B组明显高于C组和D组(P<0.01);C组和D组比较差异无统计学意义(P>0.05)。A、B组间隙内成骨质量好于C、D组,A组好于B组。结论 BMP-2基因修饰BMSCs复合可注射骨组织工程支架材料Pluronic F-127移植能有效促进兔下颌骨牵张成骨新骨形成。 展开更多
关键词 骨形态发生蛋白-2 基因 骨髓间充质干细胞 对氧化聚乙烯和聚丙烯共聚物 牵张成骨 新骨形成
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复健片对不同时相脑梗死大鼠脑组织微管相关蛋白-2表达的影响 被引量:3
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作者 胡怀强 周永红 +2 位作者 马学盛 曹秉振 王新陆 《广州中医药大学学报》 CAS 2010年第2期137-140,204,共5页
【目的】观察滋补肝肾中药复健片在不同时相对脑梗死大鼠脑组织微管相关蛋白-2(MAP-2)表达的影响,探讨其促进神经干细胞分化的作用机制及MAP-2在脑梗死后的动态变化。【方法】选用240只SD大鼠随机分为正常对照组、假手术组、模型组和中... 【目的】观察滋补肝肾中药复健片在不同时相对脑梗死大鼠脑组织微管相关蛋白-2(MAP-2)表达的影响,探讨其促进神经干细胞分化的作用机制及MAP-2在脑梗死后的动态变化。【方法】选用240只SD大鼠随机分为正常对照组、假手术组、模型组和中药组,并根据脑梗死病程每组又分为3、7、14、28、42 d共5个亚组,每个亚组动物数为12只。采用改良的Longa法行大脑中动脉阻塞复制大鼠局灶性脑缺血模型,中药组灌胃给予复健片水溶液(剂量为9 g·kg-1.d-1),其他各组分别灌胃给予同剂量的蒸馏水。【结果】模型组大鼠脑梗死后3 d时,脑组织MAP-2表达即达到高峰,与正常对照组比较差异有显著性意义(P<0.0001),后逐渐下降,至第14天时降至正常水平,与正常对照组比较差异无显著性意义(P>0.05)。中药组在3 d时MAP-2出现高表达,7 d时其表达达到高峰,持续至14 d时开始下降。不同时相中药组的MAP-2表达与模型组比较差异均有显著性意义(P<0.01或P<0.0001)。【结论】复健片促进中枢神经再生作用与其能增加脑梗死后脑组织MAP-2的表达有关。 展开更多
关键词 复健片/药理学 脑梗死/中药疗法 神经再生 脑组织/病理学 微管相关蛋白-2
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大鼠脊髓损伤模型的改良及伤后再生基因-2蛋白的表达变化 被引量:2
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作者 刘杨 苗宇船 郭继龙 《中国康复医学杂志》 CAS CSCD 北大核心 2012年第12期1102-1105,共4页
目的:制备改良的大鼠脊髓损伤(SCI)动物模型,并探讨再生基因(Reg)-2蛋白在SCI后的表达规律。方法:采用36只SD大鼠。参考Allen法,使用自制打击装置致大鼠T13段脊髓中度损伤。以行为联合评分法(CBS)评定模型的可靠性。免疫印迹法和免疫组... 目的:制备改良的大鼠脊髓损伤(SCI)动物模型,并探讨再生基因(Reg)-2蛋白在SCI后的表达规律。方法:采用36只SD大鼠。参考Allen法,使用自制打击装置致大鼠T13段脊髓中度损伤。以行为联合评分法(CBS)评定模型的可靠性。免疫印迹法和免疫组织化学(SABC)法对正常对照组、伤后第1天、第2天、第3天、第5天和第7天的大鼠脊髓组织中的Reg-2蛋白进行检测。结果:SCI后大鼠一般情况符合临床损伤特点,且稳定性强;各损伤组大鼠神经功能联合评分均呈明显下降趋势,与正常对照组比较差异具有显著性意义(P<0.05);在正常对照组大鼠脊髓神经元内有微量的Reg-2蛋白表达(阳性细胞数为17.3±2.6,Reg-2相对表达量为0.038±0.007)。SCI后1天,大鼠脊髓内Reg-2表达的免疫阳性细胞随着损伤时间的推移逐渐增多,至伤后第7天仍呈高水平表达(阳性细胞数为90.0±3.6,相对表达量为0.694±0.018),各组间比较差异具有显著性意义(P<0.05)。伤后3天内,Reg-2免疫阳性细胞以后角神经元为主,而伤后7天以前角神经元和胶质细胞为主。结论:本实验装置制作的大鼠SCI模型稳定、可靠;SCI后Reg-2蛋白表达开始升高,对受损神经起保护和修复作用。 展开更多
关键词 脊髓损伤 再生基因-2蛋白 免疫印迹 免疫组化
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rhBMP2复合材料用于甲状软骨再生修复的研究 被引量:3
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作者 张龙城 胡万青 +4 位作者 曹高翔 林文彪 陆梦漪 韦干观 陈昊鹰 《中国耳鼻咽喉颅底外科杂志》 CAS 2015年第1期57-60,64,共5页
目的运用组织工程学方法制作人工材料支架修复兔甲状软骨缺损,寻求一种重建甲状软骨的新途径。方法运用泡沫凝胶注模法制备多孔HA,以冷冻吸附法将Ⅰ型胶原、rh BMP-2沉淀于HA支架上形成rhBMP-2/Ⅰ型胶原/HA复合材料。实验动物分为两组,... 目的运用组织工程学方法制作人工材料支架修复兔甲状软骨缺损,寻求一种重建甲状软骨的新途径。方法运用泡沫凝胶注模法制备多孔HA,以冷冻吸附法将Ⅰ型胶原、rh BMP-2沉淀于HA支架上形成rhBMP-2/Ⅰ型胶原/HA复合材料。实验动物分为两组,实验组以Ⅰ型胶原、HA、rh BMP-2为材料,对照组以Ⅰ型胶原、HA为材料,分别进行甲状软骨缺损的原位修复,观察并评估其修复效果。结果 HA体积分数为50%的多孔支架材料孔隙率为(50.54±3.02)%,孔隙孔径为100~200μm。大体观察见术后7周时,实验组支架材料降解完全,被片状骨性组织所替代,新生骨切面呈黄白色,质地较硬,且新生骨质与对侧未切除甲状软骨边缘紧密结合;对照组支架仍只见纤维结缔组织包膜。组织学检查见实验组术后3周材料降解,手术区域软骨母细胞增生伴成软骨区域形成;术后7周可见软骨细胞增生及软骨骨质形成。对照组3周、7周可见软骨缺损边缘软骨母细胞增生,少量成熟软骨细胞聚集,缺损中央区未见成熟软骨细胞。结论 rh BMP-2/Ⅰ型胶原/HA复合材料具有良好生物相容性,是骨诱导和骨传导性好的材料,可作为一种新型甲状软骨缺损的修复材料。 展开更多
关键词 重组人骨形态发生蛋白-2 Ⅰ型胶原 羟基磷灰石 再生 甲状软骨
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