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简介：Objective:ToconstructtherecombinantplasmidcontainingGlycerophosphodiesterphosphodiesterase(Gpd)genefromTreponemapallidumandtransfectitintoHelacellstoexpresstheencodedoutermembraneprotein.Methods:TheGpdgenewasamplifiedfromthegenomicDNAofT.pallidumbypolymerasechainreaction(PCR)andinsertedintocloningvectorpUCm-T.TheinsertedGpdgenewassubclonedintotheappropriatesiteofpcDNA3.1(+)vector.Afteridentificationbysequencingandrestrictiveenzymesdigestion,therecombinantplasmidwastransfectedintoHelacellsusingliposomes.TheexpressedproteinwasidentifiedbyimmunocytochemistryandWesternblot.Results:ThetargetGpdgenesegmentwasapproximately1059bp.TheDNAsequenceoftheGpdgenecontainedinthepcDNA3.1(+)vectorwasconsistentwiththepublishednucleotidesequence.ThehomologyofthenucleotideandputativeaminoacidsequencesoftheGpdgenebetweenT.pallidumsubsp.pallidumNicholsandvariouspathogenictreponemalstrainsrangedfrom98%to100%.ImmunocytochemistryandWesternblotanalysisshowedthattheconstructedGpd-pcDNA3.1(+)vectorexpressedafusionproteinwithacalculatedmolecularmassof41KDainHelacellsandthattheexpressedproteinreactedwiththeserafromsyphilispatients.Conclusion:ThesuccessfulconstructionandexpressionoftheeukaryoticexpressionplasmidoftheGpdgenefromT.pallidumprovideapromisingtooltofurtherstudythebiologicalactivityofT.pallidumanddevelopaDNAvaccineforsyphilis.

简介：上世纪90年代以来,广东在性文化建设方面取得显著成绩。本文在总结其主要做法和经验的基础上,对其重要意义进行了综合评价。认为广东开展性文化建设有利于青少年健康成长,有利于计划生育国策的落实,有利于提高出生人口素质,有利于国家人口安全,有利于平衡出生人口性别比,有利于树立以人为本的理念,有利于文化大省建设。并针对存在的问题和不足,指出了今后的发展方向和应采取的对策和措施。

简介：皮肤位于人体表面,易于观察及分析,因此皮肤病学是最适宜应用各种图像技术的临床二级学科,也是人工智能在医学研究的主要应用领域之一。皮肤病学涵盖2000多种不同皮肤病,皮肤健康和皮肤疾病是发生率最高的医学问题（几乎每个人均有）。