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简介:摘要目的用生物信息学分析筛选骨肉瘤预后相关基因。方法从Gene Expression Omnibus(GEO)下载GSE33382、GSE21257数据集。分析获得差异表达基因(DEGs)。对差异基因进行GO分析,构建蛋白互作网络。Cytoscape进一步筛选关键基因,对关键基因进行生存相关性分析。用临床样本验证关键基因与患者预后情况。两组间差异采用Student’s t检验。结果筛选下调基因43个,上调基因43个,GO分析发现差异基因主要富集在免疫应答、抗原处理和呈递、免疫反应、蛋白质加工和成熟等免疫相关过程。在分子功能中,主要参与细胞内主要组织相容性复合体(MHC)Ⅱ类受体活性、核糖体结构组成、信号和分子转导活性等。在细胞组成成分方面,主要与主要组织相容性复合体蛋白质复合物、裂解空泡、液泡、溶酶体、细胞膜、核糖体等细胞器的功能有关。筛选出10个关键基因:补体C1q A链(CIQA)、补体C1q B链(C1QB)、补体C1q C链(C1QC)、单核细胞分化抗原CD 14(CD14)、单核细胞分化抗原CD 74(CD74)、IgE受体Fc片段(FCER1G)、纤维蛋白原样蛋白2(FGL2)、组织相容性抗原(HLA-DRA)、整合素β2亚基(ITGB2)、酪氨酸激酶结合蛋白(TYROBP)。生存分析发现C1QC与骨肉瘤患者生存呈明显负相关。临床样本证实C1QC与肿瘤Enneking分期、转移显著相关(χ2=4.288和9.809,P<0.05),与患者生存时间呈明显负相关(χ2=5.175,P<0.05)。结论生物信息学分析是有效的筛查方法,C1QC是骨肉瘤预后相关因子。
简介:摘要目的探究糖尿病患者HbA1c水平以及Cys-C水平与其肾脏功能损害之间的相关性。方法本研究选取2015年10月—2016年10月期间在我院接受治疗的181例2型糖尿病患者作为试验组研究对象,根据患者尿蛋白排泄率的不同,将患者分为三组,并选择同期在我院进行健康体检的60例志愿者作为对照组研究对象,探究糖尿病患者HbA1c水平以及Cys-C水平与其肾脏功能损害之间的相关性。结果在对照组、正常蛋白尿组、微量蛋白尿组以及临床蛋白尿组中受试对象的HbA1c水平以及Cys-C水平呈明显的依次升高趋势,而其eGFR则依次降低,P<0.05,组间差异有统计学价值。且Pearson相关分析结果显示,受试对象的HbA1c水平以及Cys-C水平与eGFR之间具有明显的负相关关系,r值分别为-0.152以及-0.116,P<0.05。结论HbA1c水平以及Cys-C水平的升高对2型糖尿病患者早期肾功能损害的临床诊断具有十分重要的临床参考价值。
简介:摘要:目的:研究掌侧锁定加压钢板治疗老年桡骨远端C1、C2型骨折患者的临床疗效。方法:选择我院在
简介:摘要:通过对和谐型交流传动电力机车司机室空调加热控制电路中所使用的固态继电器的原理介绍,结合固态继电器的优缺点,分析了造成在高压试验时空调不制热这起典型故障的原因,通过在固态继电器上增加吸收电容,降低固态继电器负载两端的尖峰电压,提高固态继电器电磁兼容性的措施解决了该故障。
简介:AbstractBackground:Microglia plays an indispensable role in the pathological process of sleep deprivation (SD). Here, the potential role of microglial CX3C-chemokine receptor 1 (CX3CR1) in modulating the cognition decline during SD was evaluated in terms of microglial neuroinflammation and synaptic pruning. In this study, we aimed to investigat whether the interference in the microglial function by the CX3CR1 knockout affects the CNS’s response to SD.Methods:Middle-aged wild-type (WT) C57BL/6 and CX3CR1-/- mice were either subjected to SD or allowed normal sleep (S) for 8 h to mimic the pathophysiological changes of middle-aged people after staying up all night. After which, behavioral and histological tests were used to explore their different changes.Results:CX3CR1 deficiency prevented SD-induced cognitive impairments, unlike WT groups. Compared with the CX3CR1-/- S group, the CX3CR1-/- SD mice reported a markedly decreased microglia and cellular oncogene fos density in the dentate gyrus (DG), decreased expression of pro-inflammatory cytokines, and decreased microglial phagocytosis-related factors, whereas increased levels of anti-inflammatory cytokines in the hippocampus and a significant increase in the density of spines of the DG were also noted.Conclusions:These findings suggest that CX3CR1 deficiency leads to different cerebral behaviors and responses to SD. The inflammation-attenuating activity and the related modification of synaptic pruning are possible mechanism candidates, which indicate CX3CR1 as a candidate therapeutic target for the prevention of the sleep loss-induced cognitive impairments.
简介:1IntroductionFullerenehasreceivedconsiderableattentionandagreatresearchinginterestduetoitsuniquestructureandinterestingproperties[1-3].Manyfunctionalgroupshavebeenintroduced,oftenregion-orstereo-selectively,fortuningthephysicalpropertiesofC60andforconstructingsupramoleculararchitectures[4-6].AmongallkindsofC60derivatives,thediseoticmolecule-substitutedC60derivativesshowinterestingproperties,especially,liquidcrystalproperties.Uptonow,fewC60derivativeswithdiscotic-moleculargroupsandtheirliquidcrystalpropertieshavebeenstudied.In1996,Deschenauxetal.[7]reportedthefirstmesomorphicC60-ferrocenederivative.Tianetal.[8]synthesizedaC60-perylenederivativein2004.Nakanishietal.[9]preparedaseriesofuncommonliquidC60derivativeswith2,4,6-tris(alkyloxy)benzalgroupsin2006.Lately,Geertsetal.[10]describedthesynthesisofmesogenicphthalocyanine-C60.
简介:目的建立实验红鲫C1HD系生化遗传标记。方法采用聚丙烯酰胺梯度凝胶垂直电泳法,分析实验红鲫C1HD系与普通红鲫的苹果酸脱氢酶(MDH)和超氧化物歧化酶(SOD)等同工酶。结果实验红鲫C1HD系和普通红鲫血清蛋白电泳可分离出25条以上蛋白带,分为A、B、C等3个区段。在A、B区段,实验红鲫C1HD系分别具有SP-A1谱带和SP-B1、SP-B3-8谱带,但缺少SP-A2、SP-A3和SP-B2谱带。实验红鲫C1HD系具有8条SOD同工酶电泳谱带,比普通红鲫多出SOD-3、SOD-8两条特征带。两种红鲫均具备MDH-1、MDH-2和MDH-3电泳谱带,且带型一致;普通红鲫额外具备MDH-4和MDH-5两条电泳谱带。结论血清蛋白SP-A1和超氧化物歧化酶SOD-3、SOD-8电泳谱带可以作为实验红鲫C1HD系的生化遗传标记。
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简介:AbstractBackground:Fourier transform infrared (FTIR) spectroscopy technique has not been used as a diagnostic tool for diabetes in clinical practice. This study was linked to structural changes in hemoglobin (Hb) in type 2 diabetes patients at higher levels of HbA1C using FTIR spectroscopy.Methods:Fifty-three diabetic patients from the Bahawal Victoria Hospital, Bahawalpur, Pakistan were categorized as group A (6% < HbA1C < 7%; n = 25) and group B (HbA1C ≥9%; n = 28). Another group (group N) of twenty blood samples was taken from healthy people from the Islamia University Bahawalpur, Pakistan. Data from all groups were collected from January 1, 2018 to March 31, 2019. The structure of Hb was studied by FTIR spectroscopy and impact of glucose on the fine structure of HbA1C was estimated.Results:Hb secondary structure erythrocyte parameters were altered by changing glucose concentrations. From FTIR spectra of all three groups it was found that Hb structure was slightly altered in group A, but significantly changed in group B (P < 0.05). There was an increase in β-sheet structure and a reduction in α-helix structure at elevated levels of HbA1C (group B) in type 2 diabetes.Conclusion:We suggest that higher level of glycation reflected by increased HbA1C might be a contributing factor to structural changes in Hb in type 2 diabetic patients. FTIR spectroscopy can be a novel technique to find pathogenesis in type 2 diabetes.