简介：ToconstructandexpressthefusionproteinStx2B-IntiminC300ofEHEC0157:H7,andtofurtherinvestigateitsimmunoprophyiacticpotential,thegeneofStx2B(stx2b)fromEHEC0157:H7chromosomewasclonedintopMD18-Tvector.Thereafter,theamplifiedgenewasclonedintoprokaryoticexpressionplasmidpET-28a(+)-eaeC300,whichwasconstructedpreviously.TherecombinantpasmidpET-28a(+)-stx2b-eaeC300wastransformedintoE.coliBL21(DE3).Afterinducement,theproteinStx2B-IntiminC300wassuccessfullyexpressedandanalyzedwithsodiumdodecylsulfatepolyacrylamidegelelectrophoresis(SDS-PAGE),WesternblottingandN-terminalaminoacidresidualsequencing.Toevaluateitsimmunoprophyiacticpotential,itwasprimarilypurifiedbyion-exchangechromatographyandinjectedinto30BALB/cmicewithAl(OH)3inthesubscapularregion.Tendaysafterthelastboostervaccination,20micewereattackedwithEHEC0157:H7lysateandtheprotectiveefficacywasobserved.Inthepresentstudy,thegeneofStx2B-IntiminC300wassuccessfullyclonedintopET-28a(+)vector.TheresultsofSDS-PAGEandWesternblottingassayshowedthatthefusionproteinwassuccessfullyexpressedintheinclusionbodyform,accountingfor25%oftotalexpressionproducts,anditsmolecularweightwasabout43kDa.TheresultoftheN-terminalaminoacidresidualsequencingshowedthatitwasidenticaltothatofthemoleculardesigned.Thepuritywasabout75%afterprimarypurification.AnimaltestsrevealedthatthefusionproteinStx2B-IntiminC300haselicitedhightiterofprotectiveantibodyrelatively.TheseresultsdemonstratethatthefusionproteinStx2B-IntiminC300issuccessfullyexpressedinprokaryoticexpressionsystemandshowscertainimmunoprophyiacticpotential.

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简介：InordertorevealvariationandrevolutionofNPgenesofhumanavianH_5N_1influenzavirusstrains,theNPgeneofahumanavianH_5N_1influenzavirusstraininGuangdongwassequencedandtheglobalNPgenesofstrainswereretrieved.ThesequenceswereanalyzedbyDNAStar5.0,andtheevolu-tionaryspeedwasstudiedwithreferencetotheepidemiologicaldata.ItwasfoundthatNPgenesof45strainsduring1997-2006werehomologicallyclassifiedintothreegroups:strainsin1997-1998,strainsin2004-2005andstrainsfrom2003to2006.Therewere35substitutionsinNPsinallstrainsaccountingforaratioof7.03%(35/498).Anadditionalglycoproteindomain(NGT_(430-432))wasfoundinNPgenesinthestrainsof2003-2006,themutationofN_(370)SinGD-01-06resultedinoccurrenceofonemoreglyco-proteindomain(NES_(368-370)).Inthesynonymousvariation,K_svaluesinNPwere2.03×10~(-5)-2.55×10~(-5)Nt/dandK_avaluesinNPwere1.58×10(-6)-3.10×10~(-6)Nt/d.Theredidn′texistobviouslyselectivepres-sure.Anadditionalglycoproteindomainineverystrainof2003-2006andonemoreinstrainGD-01-06mightchangetheantigenicityofhumanavianH_6N_1influenzavirus.ThevariationonhumanavianH_5N_1influenzastrainsoccurredfrequentlyinthenaturalworld,whichwouldresultinhighprobabilityofhu-man-humantransmissionalongwiththenaturalevolutionofthevirus.

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简介：摘要：国际糖尿病联盟(IDF)提出糖尿病的治疗目标不能仅局限于控制血糖水平，还要将提高病人的生活质量作为重要指标。1DF提出的五项基本措施，即饮食治疗、体育锻炼、药物治疗、糖尿病教育和自我血糖监测，在21世纪仍然需要对糖尿病进行综合治疗。此外，还应注意同时积极处理心脑血管疾病危险因子如高血压、脂代谢紊乱等。

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简介：【摘要】目的：分析对 老年 2型糖尿病 (T2DM)患者采用利拉鲁肽治疗的 临床效果。方法：选取我院 2018年 2月 -2019年 4月收治的 110例 老年 2型糖尿病 (T2DM)患者为分析对象，给予所有患者利拉鲁肽进行治疗，经治疗 8 周后，对患者治疗前与治疗后的空腹血糖、餐后 2h 血糖、体重指数以及胰岛 β 细胞 功能指数进行对比。 结果：经所有患者 8 周治疗后所有相关临床指标均优于治疗前，治疗前后指标对比差异存在显著临床可比性 （ P<0.05）。 结论：临床上对 老年 2型糖尿病 (T2DM)患者采用利拉鲁肽治疗效果显著，在改善患者胰岛功能以及血糖时具有较高的安全性，值得在临床推广应用 。

简介：【摘要】康复新液是一种通利血脉，养阴生肌的纯中药制剂。临床可辅助胃黏膜修复，但其副作用尚不清楚。我们将康复新液用于2例由于痛风长期服用非甾体消炎药所致的胃溃疡患者，偶然间发现康复新液诱发了痛风性关节炎的急性发作。回顾病史及查阅文献，我们猜测可能是由于其昆虫成分增加血尿酸有关。本病案记载了康复新液的潜在不良反应，为临床其相关禁忌症提供参考。

简介：Analysisofthefrequencyofantigen-specificcytotoxicTlymphocytes(CTLs)exvivoislargelydependentontheuseofMHC/peptidetetramers.However,thelatterreagentshavenotbeenwidelyavailable,mostlikelybecauseoftheircostlyandtime-consumingproduction.InthisreportweutilizedaneconomicstrategytoconstructHLA/peptidetetramerswithrecombinantpeptide-linkedβ2microglobulin(β2m).TheHLA-A2-restricted,melanomaantigenMARTl-derivedpeptideMARTI27-35(AAGIGILTV)wasfusedtotheNterminusofhumanβ2mthrougha15-aminoacid(aa)-longlinkerbeforebeingrefoldedwiththerecombinantbiotinylatedHLA-A2heavychainectodomain.Theresulted2-component(2C)monomerwasthentetramerizedwithphycoerythin-labeledstreptavidin.Theexperimentalresultshowedthatthe2CHLA-A2/MARTI27-35monomerwasshowntobindtotheHLAclassⅠcomplex-specificmonoclonalantibodyW6/32andtheHLA-A2/MARTI27-35complex-specificsinglechainantibodyfragment(scFv)8.3,suggestingthecorrectnessofitsspecificity.Furthermore,the2CHLA-A2/MARTI27-35tetramerdetectedaspecificCD8^+TcellpopulationinHLA-A2-restrictedmelanomainfiltratinglymphocytesastheconventional3CHLA-A2/MARTI27-35tetramer.Theyieldof2CHLA-A2/MARTI27-35monomerwas2.5timesmorethanthatoftheconventional3Cmonomer.Takentogether,thesedataindicatethattheHLA-A2/MARTI27-35tetramercanbegeneratedconvenientlythroughtheuseofMARTI27-35peptide-β2mfusionproteins,whichcanfacilitatethemonitoringofHLA-A2-restricted,MARTl-specificCTLresponsesinpatientswithmelanoma.

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简介：【摘要】目的：分析综合护理干预在 2型糖尿病肾病护理中所取得的护理价值。方法：选择我院在 2017年 4月 ~2019年 5月诊治的 2型糖尿病肾病患者 84例作为护理对象，将患者均分为观察组 42例和对照组 42例，观察组应用综合护理干预，对照组应用常规护理，对比两组患者护理后血糖和肾功能指标、患者护理前后情绪状态。结果：观察组患者的血糖和肾功能指标均优于对照组， P<0.05；在护理前，两组患者负面情绪评分相似，经过护理后，观察组患者负面情绪评分降低，数据对比有意义。结论：在 2型糖尿病肾病患者的护理中应用综合护理干预可显著改善病情，缓解不良情绪，取得了积极的护理价值，值得推广。

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简介：ToexploretheantiviraleffectandmechanismofpolysaccharidefromSpirulinaplatensis(PSP)onherpessimplexvimstype2(HSV-2),astandardstrainofHSV-2(333strain)wasusedtoinvestigatetheantiviraleffectofPSPinvitro.PSPinvariousconcentrationswasappliedtodifferentstagesofHSV-2replicationcycle.Finally,thevirusinfectivity(TCID50),cytopathiceffect(CPE),andMTTstainingmethodforviablecells(MTTassay)wereusedasmarkerstoevaluatetheeffectofPSPonHSV-2.ThequantityofHSV-DNAwasdetectedbyreal-timefluorescencequantitativePCR(FQ-PCR).TheHSV-2infectedVerocellultrastructureswereobservedbytransmissionelectronmicroscopy(TEM).TheresultsshowedthatPSPhadlittlecytotoxiceffectonVerocells,itcouldnotdirectlyinactivateHSV-2infectivity.PSPnotonlyinterferedinadsorptionofHSV-2toVerocellsbutalsoinllibitedHSV-2biosynthesisinthecells.FQ-PCRresultsshowedthattheinhibitoryrateonHSV-DNAalsoincreasedinadose-dependentandtime-dependentmanner.TEMalsoconfirmedthatPSPexhibitedpronouncedinhibitoryeffectonHSV-2.Inconclusion,theantiviraleffectofPSPonHSV-2maybeattributedtotheinhibitionofvimsadsorption,vimsreplicationandsynthesisincells.

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简介：ThegenomeoftheenterohemorrhagicEscherichiacoliO157:H7EDL933contains177“O”-islands(OIs).TostudytheirpotentialcontributiontotheO157-specificpathogenicity,wesurveyedthedistributionof22OIsbyPCRandDNAhybridizationin17isolatesofShigatoxinproducing(Stx-positive)E.coliO157:H7,andcomparedwiththeirdistributionin21isolatesofStx-negativeE.coliO157and21isolatesofnon-O157entericpathogens.Fourteenof22OIswerepresentinnon-O157entericpathogensanalyzed.Eightof22OIswerefoundonlyinthe17Shigatoxin-(Stx)positiveE.coliO157:H7isolates,buttheywereabsentfromthe21Stx-negativeE.coliO157:NMandO157Hundisolatestested.Amongthe8OIs,onlyOI43orOI48wereexclusivelydetectedinStx-positiveE.coliO157:H7,absentfromneitherofStx-negativeE.coliO157andnon-O157entericpathogens,suchasSalmonella,ShigeUa,Citrobacter,Vibriocholera,enteropathogen-icE.coli(EPEC),enteroadherentE.coli(EAEC),enteroinvasiveE.coli(E1EC)andenterotoxingenicE.coli(ETEC).TheOI43andOI48are83kbinsizeandidenticalinDNAsequences,whichencodegenesforurease,telluriteresistanceandadherence.ByanalyzingtheirjunctiongeneswithPCRandDNAhybridization,wefoundthat21ChineseisolateshaveOI48only.However,for7Japanesepatientisolates,4haveOI43and3haveOI48;forAmericanisolates,2havebothofO143andOI48,2haveOI48only.ThesedataconfirmedthehighlyplasticityofthepathogenicE.coligenome.TheuniquepresenceofOI43/OI48inStx-positiveE.coli0157:H7denotesitscriticalroleinthepathogenicityspecifictothispathogen.

简介：【摘要】目的：探讨连续护理联合24h动态血压监测对老年原发性高血压病病人睡眠及血压控制的影响。方法：抽取本院2019.01至2019.12时段内诊疗的86例原发性高血压老年病人，划分为甲组（43例）和乙组（43例）。甲组仅为常规护理，乙组为连续护理联合24h动态血压监测，评估病人睡眠及血压控制效果。结果：干预1个月、2个月、3个月时，患者血压水平和睡眠质量均优于第2天，但乙组改善幅度明显超过甲组，数据比较有意义（P＜0.05）。结论：针对原发性高血压老年病人，连续护理联合24h动态血压监测模式，既可增强病人睡眠质量，还可稳控血压，促进疾病恢复，可推广。