摘要：Objective To establish a rat model of chronic atrophic gastritis and explore the factors inducing *** In accordance with repeated orthogonal design of L8(27), 60% alcohol and 20mmol/L sodium deoxycholate (served as factor A), 0.05%-0.1% ammonia water (factor B), 0.05% indomethacin (factor C) were given, alone or in combination, to rats in three experiments for 3 months, 6 months or 9 months respectively. Then the rats were dissected, and their pathologic changes of the gastric mucosa were *** Typical signs of chronic atrophic gastritis (CAG) were found in all rats which were treated with factor A, B, C alone or in combination for 6 or 9 months. No significant difference of pathologic changes of gastric mucosa was found between the rats treated for 6 months and those for 9 months. No obvious CAG signs were found in the rats treated with factor A, B, C for 3 *** Sixty percent of alcohol, 20mmol/L sodium deoxycholate, 0.05%-0.1% ammonia water and 0.05% indomethacin given to Sprague-Dawley rats for 6 months can successfully establish the animal model of CAG. Prolongation of the model-establishment time is not able to further facilitate the atrophy of gastric mucosa.

摘要：目的:构建再生蛋白Iα(regeneration gene Iα,RegIα)的cDNA过表达质粒表达载体,在体外评价其对胃癌细胞株增殖及其凋亡的影响。方法:根据RegIαcDNA的全序列设计引物,用RT-PCR的方法从胃黏膜组织的总RNA中获取RegIα的cDNA编码区域的全序列,经测序其与目的基因序列一致。将获取的RegIα序列经TA克隆和亚克隆至pIRES2-EGFP真核表达质粒载体中;将构建的RegIα过表达质粒载体pIRES2-RegIα-EGFP转染胃癌细胞株MKN28,并用空载体pIRES2-EGFP作为对照,利用G418筛选稳定表达pIRES2-RegIα-EGFP的MKN28细胞株。通过RT-PCR及Western blot检测转染后细胞RegIα在mRNA及蛋白质水平的表达;MTT法和流式细胞仪分别检测RegIα过表达后MKN28细胞增殖及拮抗H2O2诱导凋亡的变化。结果:成功构建RegIαcDNA的全序列表达质粒。RT-PCR及Western blot检测显示:转染pIRES2-EGFP质粒的MKN28细胞RegIαmRNA及蛋白表达水平明显升高(P<0.05);MTT试验显示:转染后细胞增殖能力明显升高(P<0.05),而且拮抗H2O2凋亡的能力增强(P<0.05)。结论:RegIα的过表达能明显增强胃癌细胞MKN28的增殖和拮抗H2O2诱导凋亡的能力。

摘要：粪菌移植(FMT)作为一种治疗方法已被证实对艰难梭菌感染有效,同时对炎症性肠病(IBD)具有一定疗效,但仍需更多大样本设计良好的临床试验证实。尽管FMT总体来说是安全的,但目前还存在许多问题,包括长期安全性、技术标准化等。该文就FMT在IBD领域的研究进展及其面临的挑战作一综述。

摘要：目的检测TNF超家族成员15(TNFSF15)基因多态性与浙江地区汉族人克罗恩病患者遗传易感性的相关性。方法抽取42例克罗恩病患者(克罗恩病组)、49名健康者(对照组)外周静脉血并提取DNA,设计TNFSF15三个单核苷酸多态性(SNP)(rs3810936,rs6478109,rs7848647)目的基因特异性引物,扩增样本中的目的基因进行测序,分析等位基因的多态性与遗传易感性及与临床亚型的关系。结果两组rs3810936,rs6478109,rs7848647三个位点的等位基因携带频率及基因型频率比较差异无统计学意义。三个基因多态性位点组成的亚型B1(cc-gg-cc)即包含三个危险等位基因的亚型,与对照组相比,其亚型频率分别为38%和26%(χ2=1.393,P=0.238),而亚型A1(tt-aa-tt)即包含三个保护等位基因的亚型,与对照组相比,其亚型频率分别为14%和12%(χ2=0.082,P=0.774),无明显保护作用。多因素Logistic回归分析显示TNFSF15的SNP可能与克罗恩病的临床亚型无显著相关性,但rs3810936与rs6478109有相关性(r=0.802,P<0.01),rs3810936与rs7848647有相关性(r=0.793,P<0.01),rs6478109与rs7848647有相关性(r=0.948,P<0.01)。结论 TNFSF15的三个SNP(rs3810936,rs6478109,rs7848647)与浙江地区汉族人克罗恩病遗传易感性、临床亚型无显著相关性。TNFSF15基因rs3810936,rs6478109,rs7848647的SNP可能存在种族及地域差异。

摘要：三腔二囊管是临床紧急治疗食管胃底静脉曲张破裂出血的手段之一。置管后需牵引,临床工作中,常常就地取材,如使用普通毛线绳对导管进行固定后,估算45°角在尾端绑上500 ml的0.9%氯化钠溶液后通过输液架进行牵引。但该方法不利于转运,且输液架容易倾倒,导管与水平面的角度无法精确到45°,影响治疗效果。为此,笔者设计了一种三腔二囊管牵引装置,现报道如下。