简介:摘要目的探讨胃癌(GC)患者血清中长链非编码RNA(lncRNA)H19、lncRNA母系表达基因3(MEG3)的表达及临床意义。方法选取宿迁市第一人民医院2017年7月至2018年8月收治的87例GC患者为GC组,51例良性肿瘤患者为良性肿瘤组,40名体检健康者为健康对照组,测定各组血清lncRNA H19、lncRNA MEG3表达水平,分析其与GC患者临床病理特征和预后的关系及对GC的诊断价值。结果健康对照组、良性肿瘤组、GC组血清lncRNA H19水平依次递增,lncRNA MEG3水平依次降低(P<0.05);GC组血清lncRNA H19水平与肿瘤浸润深度、TNM分期、淋巴结转移有关,lncRNA MEG3水平与分化程度、TNM分期、淋巴结转移有关(P<0.05);随访13~32(23.54±4.18)个月,87例GC患者存活63例,Kaplan-Meier生存曲线显示,高血清lncRNA H19水平组和低血清lncRNA MEG3水平组总生存率明显低于低血清lncRNA H19水平组和高血清lncRNA MEG3水平组(P<0.05);多因素Cox回归分析显示,lncRNA H19(HR=3.442,95% CI:0.089~23.421)为GC患者预后独立危险因素,lncRNA MEG3(HR=4.386,95% CI:0.934~20.596)为保护因素(P<0.05);受试者工作特征(ROC)曲线显示,血清lncRNA H19+lncRNA MEG3(AUC=0.922,95% CI:0.861~0.962)诊断GC的灵敏度、特异度、准确度均高于血清lncRNA H19(AUC=0.840,95% CI:0.771~0.904)、lncRNA MEG3(AUC=0.830,95% CI:0.753~0.890)单独诊断。结论GC患者血清lncRNA H19水平明显升高,lncRNA MEG3水平明显降低,与肿瘤发生和发展及预后密切相关,联合检测可提升GC的诊断价值。
简介:四lanthanide协作建筑群,也就是[行(2,3-DClBA)3(5,5-dmebipy)(H2O)]2(Ln=Sm(1),Eu(2),Dy(3),惊讶(4));2,3-DClBA=2,3-dichlorobenzoate;5,5-dmebipy=5,5-dmethylbipyridine)被元素的分析,红外线的光谱学和单个水晶X光检查衍射综合并且描绘。调查结果显示建筑群3是一个dinuclear分子,并且中心Dy3+是八坐标的。每个dinuclear单位能被H债券和卤素卤素相互作用连接。建筑群2的光性质建议了Eu3+离子的典型强烈排出物。热分析证明建筑群在三分解了步:协作水然后第一被失去中立ligand5,5dmebipy被失去,最后,2,3-DClBAligand被失去。
简介:Thecrystalandmolecularstructuresof[(C3H7O)2PS2]2(CCDCNo.217201)weredeterminedbymeansofX-raycrystallography.ItcrystallizedinatriclinicsystemwithspacegroupP1^-andlatticeparametersa=0.82794(3)nm,b=0.84764(2)nm,c=0.85034(3)nm,α=97.78(3)°β=110.77(3)°,γ=94.95(3)°,V=0.54701(9)nm^3,Z=1.Inthismolecule,thetwodiisopropyldithiophosphategroups,[(C3H7O)2PS2]2,whichareparalleltoeachother,arelinkedbyanS--Sbondandthereexistinversioncentersinthemolecule,Inthestructure,theP=Sbondsinthetwodithiophosphateunitsaretrans-orientedtoeachother.
简介:Thetetranuclearalkyltin(Ⅳ)compounds{[R2Sn(C9H8N3O3)O]SnR3}2[R=n-Bu(1),4-CNC6H4CH2(2),C6H5CH2(3),4-ClC6H4CH2(4)]werepreparedbythereactionofSchiffbaseligandpyruvicacidisonicotinylhydrazonewith(R3Sn)2Ointhecorrespondingmolarratioof1:1.Allcompoundshavebeencharacterizedbyelementalanalysis,IRand^1HNMRspectra.Thecrystalstructureofcompound1wasdeterminedbyX-raysinglecrystaldiffractionalanalysis.Thiscompoundexhibitsadimericstructurecontainingdistannoxaneunitswithtwotypesofthetinatoms.Forthefirsttinatom,itappearstobeseven-coordinatedwithadistortedpentagonalbipyramidgeometry,andtheotherisfive-coordinatedwithadistortedtrigonalbipyramidalgeometry.Themoleculesarepackedintheunitcellintwo-dimensionalnetworkstructurethroughaninteractionbetweentheNatomsofthepyridineandthetinatomsofanadjacentmolecule.
简介:Ionothermalsynthesiswasusedtoprepareanovelaminoacidcontaininghybridzincophosphatemonomer,[Zn(HPO4)(H2PO4)][C6H10N3O2](denotedasZnPO-CJ58).Theinorganicframeworkof[Zn(HPO4)(H2PO4)]·[C6H10N3O2]consistsof4-memberedringsformedbyZnO3OHisandPO2(OH)2tetrahedra.TheHPO4andaminoacidmoietieshangontheZncenter.Suchaframeworkisstabilizedbyextensivemultipointhydrogenbondsinvolvingthephosphateunitsandhistidinemoleculestoformapseudo-3Dsupramolecularstructure.ItisnoteworthythatZnPO-CJ58isthefirstzincphosphateclusterwithaminoacidactingastheligand.Itexhibitsphotoluminescenceexcitedatawavelengthof220nm.Interestingly,ZnPO-CJ58cantransformintoalayeredstructure(C6H10N3O2)Zn2·(HPO4)(PO4)·H2O(ZnPO-CJ36)throughfurtherreactingwithwaterorzincacetatedihydrateinwaterat85℃for1h.Thisworkwillbehelpfulforthesynthesisofcrystallineinorganic-organichybridmaterialswithbiofunctionalmolecules.