简介：Toinvestigatethehistologicalchangeandtheexpressionsofepidermalgrowthfactor(EGF)andepidermalgrowthfactorreceptor(EGFR)inatrophicgastricmucosainratssoastoappraisetheeffectoftheseregulatorsontheformationofatrophicgastritis,tostudytheexpressionsofEGFandEGFRinratswithchronicatrophicgastritis(CAG)aftertheirradiationofHe-Nelaser,andtoinvestigatetherelationsofHe-Nelaserandprecancerouslesionorapoptosis.Theratsweredividedintonormalgroup,modelgroupandlasergroup.ThemodelsofCAGratswereestablishedwithenemawhichwasthemixedliquorconsistedofsodiumsalicylateandalcohol,combinedwithirregularfastingandcompulsivesportingaspathogenicfactors.He-Nelaser(3.36J/cm2)wasusedtoirradiateCAGrats,onceadayfor7min,20daysasacourseoftreatment;theexpressionsofEGFandEGFRweredetectedwithimmunohistochemicalmethod.Duringtheprocessofantralatrophy,theexpressionsofEGFandEGFRincreased,theywerehigherinmodelgroupthanthoseinnormalgroup(P<0.05).AftertheirradiationofHe-Nelaser,theexpressionsofEGFandEGFRwereobviouslylowerthanthoseinmodelgroup(P<0.05).Wedrawtheconclusionasfollows:gastricmucosaofmodelratisinahyper-proliferationstatus,withhighproteinexpressionsofapoptosissuppressorEGFandEGFR.CAGhassomecorrelationwiththeimbalancebetweencellproliferationandapoptosis.He-Nelaser(3.36J/cm2)canreducetheexpressionsofEGFandEGFR,whichisaneffectivephysiostimulatortostimulatethegastricmucosaofrat.TheappropriatesecretionsofEGFandEGFRarepropitioustotherepairandregenerationforthegastricmucosatissues,thuspreventingCAGtocanceration.

简介：据ArnoldP2012年11月20日（GenomeRes,2012Nov20.）报道,瑞士弗雷德里希米歇尔生物医学研究所DirkSchübeler研究团队和来自巴塞尔大学的ErikvanNimwegen研究团队开展一项重要的原理循证研究（proof-of-principlestudy）,证实一种计算模型能够阐述细胞分化期间转录调节物和表观基因组动态相互影响。

简介：有限元分析可对形态、结构、材料和载荷情况及复杂的构件进行应力、应变分析，具有力学性能测试全面、可重复性等优点，目前广泛应用于脊柱复杂结构的生物力学研究中。文章简单介绍了有限元的概念、原理和建模方法，主要从腰椎、颈椎、内固定器械和术式选择上阐述了有限元在脊柱上应用。