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简介：Objective:ToinvestigatetheeffectofsubstanceP(SP)ongeneexpressionoftransforminggrowthfactorβ-1(TGFβ-1),transforminggrowthfactorreceptor-1(TGFR-1)andtransforminggrowthfactorreceptor-2(TGFR-2)infibroblastsculturedinvitrofromrat'sgranulationtissues.Methods:Thefibroblastsfromthegranulationtissuesintheskeletalmuscleofrat'shindlimbsinjuredbyformaldehydewereculturedinvitro.Whendifferentconcentrations(10-9-10-5mol/L)ofSPwereaddedintotheculturemedium,thechangesofgeneexpressionofTGFβ-1,TGFR-1andTGFR-2intheculturedfibroblastswereobservedwithreversetranscriptionpolymerasechainreactionatdifferentintervals(0,3,6,12and24hoursafterincubation).Results:ThegeneexpressionofTGFβ-1,TGFR-1andTGFR-2inthefibroblastsculturedfromrat'sgranulationtissueswasup-regulatedbySP.ThepeaklevelofthemRNAexpressionwasfoundat10-8mol/LSPandtheup-regulationeffectwasnotfoundat10-5mol/Land10-6mol/L.ThepeaklevelsofgeneexpressionofTGFβ-1,TGFR-1andTGFR-2inthefibroblaststreatedwithSPwereachievedat6and12hours,respectively.Conclusions:SPhasup-regulationeffectonthegeneexpressionofTGFβ-1,TGFR-1andTGFR-2infibroblastsfromrat'sgranulationtissuesinvitro,andtheeffectisrelatedtodifferentstimulatingconcentrationsofSP.Itmaybeconcernedwithproliferationanddifferentiationoffibroblastsandformationofscartissuesduringwoundhealing.

简介：AIMHumanglutathioneS-transferaseA1(GSTA1)isanimportantphaseⅡmetabolizingenzymeinvolvedinthemetabolismofmanytherapeuticdrugsandisresponsibleforthemetabolicdetoxificationofnumerouspromutagensandprocarcinogens.ThegeneticpolymorphismofGSTA1hasimportantimplicationsfordrugefficacyandcancersusceptibility.Inthisstudy,wedeterminedthedistributionofGSTA1geneticpolymorphisminMainlandChinese.Andwealsoinvestigatedwhetherthereexiststhepotentialphenotypealterationscausedbythegeneticpolymorphisminhuman.METHODSGenomicDNAwasex-tractedfromperipheralbloodof140Chinesepeopleand16livertissuesobtainedfromnon-liverishpatientswhounderwentpartialhepatectomy.AndthenthegenotypesofhumanGSTA1genewereanalyzedbypolymerasechainreaction-restrictedfragmentlengthpolymorphism(PCR-RFLP).

简介：Objective:ToanalyzethedynamicchangeofserumproteinS100binpatientswithtraumaticbraininjuryanditsclinicalvalueinassessingbraindamage.Methods:AccordingtoGlasgowcomascale(GCS),102casesoftraumaticbraininjuryweredividedintomildbraininjurygroup(GCS≥13,n=31,GroupA),moderatebraininjurygroup(8

简介：摘要目的探讨手术室区域管理新方法。方法运用“5S”理论对现有手术室进行规范、科学化管理，设立专人管理、定点放置、标识明确统一、定期检查评估、定期成果汇报，人人参与，互相监督，发现问题及时改进。结果“5S”管理与区域管理结合运用改善了手术室的环境，实现了每个区域物品的安全有效性及摆放位置的规范标准化，保证手术进程中准确、快速取用，减少不必要的时间浪费，提高护士的在岗率。结论将“5S”理论应用于手术室区域管理，加强了手术室有限空间的合理运用，并提高了护士工作效率和护理质量，进一步确保医疗护理安全。

简介：目的建立临床常见念珠菌的聚合酶链反应-限制性片段长度多态性（PCR-RFLP）检测技术。方法用真菌通用引物ITS1-ITS4分别扩增白色念珠菌、热带念珠菌、光滑念珠菌、克柔念珠菌和近平滑念珠菌5种菌株的ITS1-5.8SrDNA-ITS2区域,然后对扩增产物进行MspⅠ酶切分析。结果5种念珠菌标准菌株经PCR-RFLP分析后产生了5种不同的特异性条带,成功地将临床上常见的5种念珠菌区分开来。应用此方法鉴定了60株临床分离的念珠菌,其PCR-RFLP结果与标准菌株一致,测序结果进一步证实了此方法的可靠性。结论PCR-RFLP检测技术具有快速、稳定、特异、准确性高的特点,在常见致病念珠菌鉴定方面具有良好的临床应用前景。

简介：Objective:Toexploretherelationshipbetweenperoxisomeproliferatoractivatedreceptor-gamma(PPARγ)andperoxisomeproliferator-activatedreceptor-gammacoactivator-1(PGC-1)expressioningastriccarcinoma(GC),andanalyzetheircorrelationswithclinicopathologicalfeaturesandclinicaloutcomesofpatients.Methods:Thetwo-stepimmunohistochemicalmethodwasusedtodetecttheexpressionofPPARγandPGC-1in179casesofGC,and108casesofmatchednormalgastricmucosa.Besides,16casesoffreshGCspecimensandcorrespondingnormalgastricmucosaweredetectedforPGC-1expressionwithWesternblotting.Results:ThepositiveratesofPPARγandPGC-1expressionweresignificantlylowerinGC(54.75%,49.16%)thaninnormalgastricmucosa(70.37%,71.30%),respectively(P<0.05).ThedecreasedexpressionofPGC-1inGCwasconfirmedinourWesternblotanalysis(P=0.004).PPARγandPGC-1expressionswererelatedtoLauren’stypesofGC(P<0.05).PositivecorrelationwasfoundbetweenPPARγandPGC-1expressioninGC(rk=0.422,P<0.001).ThesurvivaltimeofPPARγnegativeandpositivepatientswas36.6±3.0vs.38.5±2.7months,andnostatisticaldifferencewasfoundbetweenthe5-yearsurvivalratesoftwogroups(34.4%vs.44.1%,P=0.522,log-ranktest);thesurvivaltimeofPGC-1negativeandpositivepatientswas36.2±2.8vs.39.9±2.9months,whilenostatisticaldifferencewasfoundbetweenthe5-yearsurvivalratesofthetwogroups(32.0%vs.48.2%,P=0.462,log-ranktest)Conclusions:DecreasedexpressionofPPARγandPGC-1inGCwasrelatedtotheLauren’sclassification.TheirexpressionsinGCwerepositivelycorrelated,indicatingthattheirfunctionsingastriccarcinogenesismaybecloselyrelated.

简介：ToestablisharapididentificationmethodforcommonpathogenicbacteriaonthebasisofmolecularbiologyandtoconstructapreliminaryPolymeraseChainReaction-CapillaryElectrophoresis-RestrictionFragmentLengthPolymorphism(PCR-CE-RFLP)databaseofbacteriaisolatedfromclinicalspecimensfrequently,183strainscollectedfromclinicalsamplesbelongingto12generaand19specieswhosebiochemicalcharacterizationscorrespondedtothetypicaloneswereexamined.ThegenomicDNAswereamplifiedbytwopairsoffluorescencelabeledprimersaimingat16SrRNAgeneand16S-23SrRNAspacerregiongenerespectivelyatthesametime.PCRproductswerethendigestedbyrestrictionendonucleaseHaeⅢin-completelybeforetakingcapillaryelectrophoresis.TheresultswiththePCR-CE-RFLPpatternsof16SrRNAgeneswerejustalikewithinsomegenera,butwhenitcomesto16S-23SrRNAspacerregiongenes,eachbacteriumshowedauniquepattern,whichcanbedistinguishedfromeachothereasily.ItseemsthatPCR-CE-RFLPpatternsof16SrRNAgenecouldonlybeusedtoclassifythebacteriaintofamilylevel,whereasthedataof16S-23SrRNAspacerregiongenecouldbeutilizedtoidentifythewholemicroorganismsaspreciselyasthespecieslevel.Inspiteofthedataofthespacerregiongenealonecanbesufficientlytoverifythewholebacteria,weinsistthatthe16SrRNAgenecouldbeofsomeassistantincasethatthereshouldbelotsoffamiliesofbacteria,inwhichsomesimilarones,withthesameRFLPdataof16S-23SrRNAspacerregiongene,maycoexist.ThisstudyprovesthattheutilityofPCR-CE-RFLPisaconvenient,rapidmethodtoidentifypathogenicbacteria,andisalsoaquickdiagnosismeasureforapplicationtoclinicaluse.

简介：摘要目的监测伤寒沙门菌株对青霉素和其他抗生素的耐药情况。分析多重PCR基因扩增产物图谱与青霉素耐药性的相关性，分析血清型青霉素耐药菌株的脉冲电场凝胶电泳(PFGE)图型，初步了解耐药菌株分子流行病学上的特点。方法(1)抗生素药物敏感试验;（2）用聚合酶链反应(PCR)和限制性内切酶片段长度多态性分析(RFLP)结果发现23株多重耐药鼠伤寒沙门菌,其中耐4～5种抗生素的9株(40%)，耐6～9种抗生素的8株(35.13%)，耐10种抗生素的6株(26.10%);可分为16个PFGE型,其中5个PFGE型的菌株数超过1株。结论伤寒沙门菌分离株的多重耐药性严重,PFGE分型方法对鼠伤寒沙门菌的分型能力较好。

简介：摘要目的比较甲真菌病患者病甲与健康甲细菌和真菌微生物菌群差异。方法收集2020年8月至2021年6月于大连市皮肤病医院门诊就诊的31例甲真菌病患者的病甲及健康甲的甲屑样本，提取甲屑菌群总DNA，以细菌16S rDNA的V3-V4区序列及真菌内转录间隔区（ITS）作为目标序列进行基因扩增及Illumina测序，对所测序列采用USEARCH和mothur软件进行OTU聚类分析，采用Wilcoxon rank sum test方法进行α多样性分析，采用相似性分析（Anosim）进行β多样性分析，采用LEFSe方法进行物种差异分析。结果入组甲真菌病患者31例，男16例，女15例，按年龄分青年组（18 ~ 35岁）10例，中年组（36 ~ 60岁）11例，老年组（大于60岁）10例。α多样性分析显示，病甲组标本Shannon指数明显低于健康甲组（W = 290，P = 0.007），而Simpson指数明显高于健康甲组（W = 663，P = 0.010），病甲组细菌菌群的多样性及均匀度低于健康甲组，病甲在真菌菌群的多样性与健康甲无明显区别。β多样性分析显示，基于unweighted-unifrac距离矩阵分析结果，病甲组与健康甲组细菌和真菌微生物的组成差异无统计学意义（细菌菌群：R = 0.0052，P = 0.331；真菌菌群：R = 0.0036，P = 0.337）；基于weighted-unifrac距离矩阵分析结果，病甲组与健康甲组在细菌菌群及真菌菌群的丰度方面差异均有统计学意义（均P = 0.001）。在物种组成上，病甲组较健康甲组丰度显著降低的细菌菌群有拟杆菌门及变形菌门、β-变形菌纲、伯克氏菌目、罗尔斯顿菌属、鞘氨醇单胞菌属、链球菌属，而芽孢杆菌纲、芽孢杆菌目、葡萄球菌属明显高于健康甲组。病甲组显著升高的真菌菌群有散囊菌纲、爪甲团囊菌目、未分类锤舌菌目、关节皮肤真菌科、黑团孢属、白粉菌属、铁艾酵母属、毛癣菌属、十字花科白粉菌、红色毛癣菌、合轴马拉色菌，而酵母菌纲-酵母菌目-酵母菌科、隐囊菌科、念珠菌、链格孢菌较健康甲组显著降低。结论甲真菌病患者病甲与健康甲细菌菌群的多样性及丰度均有明显的差异，真菌菌群仅丰度存在一定的差异，其中某些真菌和细菌菌属可能具有相关性。

简介：【摘要】目的 改善工作环境，激发员工的向心力与归属感，提升工作质量与工作效率，从而提升区域消毒供应中心的服务质量，树立品牌形象。方法 成立6S管理小组，采用6S管理模式（包括整理、整顿、清扫、清洁、素养、安全）对消毒供应中心的工作区域及辅助区域进行科学的清理与整合。结果 通过科室全体人员共同参与6S管理，每个人都把6S的意识、理念形成了规则、规范，员工精神饱满，科室凝聚力显著增加，工作效率明显提高。结论 运用6S精益管理对消毒供应中心的工作进行管理，工作环境得到改善，员工的满意度提高，从而显著提高了工作质量和工作效率，大幅度提升了服务医院的认可与满意。

简介：Lactivicin,anovelinhibitorofbacterialcellwallsynthesis,wasisolatedfromtheculturefil-tratesofmicroorganismYK-258andYK-422.Itexhibitsbiologicalactivitiessimilartothoseoftheβ-lactamantibiotics,althoughitdoesnothaveaβ-lactamringinitsmolecule.Sincethediscoveryoflactivicin,hundredsofitsderivativeshavebeensynthesized.Most

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简介：目的：对远志属3种药用植物进行分子鉴定。方法：利用PCR直接测序法对远志ITS序列进行测定,结合Genbank中远志、卵叶远志和瓜子金的ITS序列,经Clustalx比对后,用软件MEGA3.1计算了Kimura2-Parameter（K2P）距离,并构建了NJ（邻接）树。结果：远志属3种药用植物ITS1长度为269bp~271bp,ITS2长度为216bp~217bp,变异位点26个,信息位点1个;瓜子金与其他样品的遗传距离最大,卵叶远志与远志2个Genbank样品遗传距离最小。结论：ITS序列无法区别卵叶远志和远志,但可以作为瓜子金的分子鉴定依据。

简介：AbstractSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused many deaths and contributed to a tremendous public health concern worldwide since 2020. Angiotensin-converting enzyme 2 (ACE2) binds to the SARS-CoV-2 virus as a receptor. The challenge of different nonhuman primate (NHP) species by SARS-CoV-2 virus demonstrated different effects on virus replication and disease pathology. This study characterizes differences between host ACE2 sequences of three NHP species: Macaca mulatta, Macaca fascicularis, and Chlorocebus sabaeus. In addition, the binding affinity between the ACE2 ectodomain and the SARS-CoV-2 S receptor-binding domain (RBD) was analyzed. Variation of ACE2 sequence among NHP species and the binding affinity may account for different susceptibility and responses to SARS-CoV-2 infection.

简介：Retinoblastoma(RB)isthemostcommonintraocularcancerofinfancyandchildhood.ThiscancerisinitiatedbymutationonRB1,thetumorsuppressorgenethatisresponsiblefortheregulationofbothcellcycleandgnomestabilityinretinalcells.PatientswithaconstitutionalmutationonRB1canbeinherited.RBoccursapproximately1inevery15000-20000livebirths.Theworldwidemortalityforthiscancerisabout5%-11%.However,thisraterisestoabout40%-70%indevelopingcountriesduetoadelayindiagnosis.Awidevarietyofoptionsareavailableforthetreatment,butoftenacombinationoftherapiesisadoptedtooptimizeindividualizedcare.

简介：Theaimofthisstudywastoanalyzethepointmutationoftheexon1atcodon54ofthemannose(ormannan)-bindinglectin(MBL)geneinhealthyindividualsofChineseHansandMongolianpopulation,andtofindoutanyassociationbetweentheplasmalevelsofMBLandthegenemutationfrequencyinbethgroupsofindividuals.Bloodsampleswerecollectedrandomlyfrom56healthyindividualsofChineseHansand37Mongolian.ThedetectionofthepointmutationsoftheMBLgenewasperformedbypolymerasechainreaction-restrictionfragmentlengthpolymorphism(PCR-RFLP)anddetectionsforplasmalevelsofMBLweredeterminedbyusingMBLELISAkits.AMBLPCRmethodofassaywasestablishedwithhighspecificity,andgoodreproducibility.ByoptimizingthePCRcondition,theoptimalannealingtemperaturewas55℃,andthelowestdetec-tionlimitwas160pg.Nobandswerefoundinnon-specificitysamples(HAV,HBV,HCVandTB),andthesequencesofPCRproductswerethesameastheexpectedones.AlsoaMBLPCR-RFIPwasestablished.Uponelectrophoresisofthedigestedproductsin3%agarosegel,therewere3patterns:inwhich2bandscorrespondtomoleculeweight232bpand93bp;1band,correspondstomoleculeweight325bpand3bandscorrespondtomoleculeweight325bp,232bpand93bp,respectively.Threebandsof325bp,232bpand93bpofpointmutationswerefoundatcedon54ofMBLcedinggene.FrequenciesinhealthyHanandMongolianpopulationwere0.2321and0.1757respectively.TheaverageplasmaMBLconcentrationwas1998.750μg/L,withSDof1505.152in56healthyHanpopulationand2525.676μg/L,withSDof1955.188in37Mongolian.AnegativecorrelationbetweenMBLconcentrationandgenemutationfrequencywasfoundinhealthyHanpopulation.Frequencyofpointmutationwas1.00whentheMBLconcentrationswerebelow100μg/L;frequencyofpointmutationwas0.4524whentheconcentrationwas100μg/Lto1000μg/L;andthefrequencyofpointmutationwas0.0156whentheconcentrationwaso

简介：Maca(Lepidiummeyenii)是在高高原成长的草本的植物并且因为它人的健康的好处，几个世纪被用作食物和民间药。在现在的学习，它的(内部抄录分隔符)43件maca样品定序，从不同区域或供应商镇定，被放大并且分析。它maca的十九潜在的掺杂物的序列也镇定、分析。结果显示maca的ITS顺序在所有样品是一致的并且唯一什么时候与它的掺杂物相比。因此，这条DNA-barcoding途径基于它的顺序能被用于maca和它的掺杂物的分子的鉴定。

简介：目的探讨特勤人员S_ⅠS_ⅡS_Ⅲ综合征特点。方法选取Ⅰ、Ⅱ、Ⅲ标准导联同时存在S波的患者心电图,分析Ⅰ、Ⅱ、Ⅲ、aVR、V1、V5导联R波与S波比值、心电轴及年龄、体型以及病史等相关参数。结果（1）S_ⅠS_ⅡS_Ⅲ综合征发生率低,仅0.9%（51/5639人）;（2）51例S_ⅠS_ⅡS_Ⅲ综合征患者心电轴偏移范围宽,在-110°～＋178°,平均（27.49±79.74）°,其中心电轴正常19例（37.3%）、右偏15例（29.4%）、左偏13例（25.5%）、心电轴不确定4例（7.8%）;（3）S_ⅠS_ⅡS_Ⅲ综合征多见于体质量指数偏低即呈瘦长体型年轻人,体质量指数〈24.0者占58.8%（30/51）;（4）疗养体检无其他异常发现。结论健康特勤人员可出现S_ⅠS_ⅡS_Ⅲ综合征,多见于瘦长体型年轻人,可能系正常心电图变异,但诊断要慎重,须经心脏超声及X射线等检查排除器质性疾病。

简介：AbstractAcute pancreatitis (AP) is a common and potentially life-threatening pancreatic inflammatory disease. Although it is usually self-limiting, up to 20% of patients will develop into severe AP. It may lead to systemic inflammatory response syndrome and multiple organ dysfunction, affecting the lungs, kidneys, liver, heart, etc. Surviving patients usually have sequelae of varying degrees, such as chronic hyperglycemia after AP (CHAP), pancreatic exocrine insufficiency, and chronic pancreatitis. Lacking specific target treatments is the main reason for high mortality and morbidity, which means that more research on the pathogenesis of AP is needed. Ferroptosis is a newly discovered regulated cell death (RCD), originally described in cancer cells, involving the accumulation of iron and the depletion of plasma membrane polyunsaturated fatty acids, and a caspase-independent RCD. It is closely related to neurological diseases, myocardial infarction, ischemia/reperfusion injury, cancer, etc. Research in the past years has also found the effects of ferroptosis in AP, pancreatic cancer, and AP complications, such as acute lung injury and acute kidney injury. This article reviews the research progress of ferroptosis and its association with the pathophysiological mechanisms of AP, trying to provide new insight into the pathogenesis and treatment of AP, facilitating the development of better-targeted drugs.