We report a patient who presented with severe enterocolitis and apparent absence of Paneth, goblet, and enteroendocrine lineages from the small bowel and colon. The absorptive enterocyte seemed to be normal morphologi...We report a patient who presented with severe enterocolitis and apparent absence of Paneth, goblet, and enteroendocrine lineages from the small bowel and colon. The absorptive enterocyte seemed to be normal morphologically and functionally. Because normal enterocytes were present, we hypothesized that this patient had a developmental block in the differentiation of a common stem cell precursor for Paneth, goblet, and neuroendocrine lineages. By using antibodies to protein markers of each cell line, including some that are expressed early in the differentiation process, we aimed to study lineage development in this patient. From our data, we surmise that there may be a two-step process in lineage commitment. The stem cell may commit to an absorptive cell or a granule-containing cell. The daughter cell that is committed to the granule lineage then further commits to a goblet, enteroendocrine, or Paneth cell lineage.展开更多
目的研究整合素连接激酶(ILK)在单侧输尿管梗阻(UUO)小鼠肾小管上皮细胞转分化中的作用及尿激酶对其的影响。方法将雄性CD-1小鼠随机分为假手术对照组(Sham,n=20)、UUO组(UUO,n=28)和尿激酶治疗组(uPA,n=28),分别于术后1、3、7和14d处...目的研究整合素连接激酶(ILK)在单侧输尿管梗阻(UUO)小鼠肾小管上皮细胞转分化中的作用及尿激酶对其的影响。方法将雄性CD-1小鼠随机分为假手术对照组(Sham,n=20)、UUO组(UUO,n=28)和尿激酶治疗组(uPA,n=28),分别于术后1、3、7和14d处死小鼠。Masson染色观察肾间质纤维化。免疫荧光和Western印迹检测小鼠肾组织ILK的分布及表达。免疫组化检测肾组织上皮细胞钙粘蛋白(E-cadherin)的表达。RT-PCR检测ILK、E-cadherin和α-平滑肌肌动蛋白(α-SMA)mRNA表达。结果与Sham组相比,UUO组术后1d ILK mRNA及蛋白表达均增高,7d达到高峰;E-cadherin mRNA及蛋白表达明显减少,α-SMA mRNA表达显著上调。与UUO组同时间点相比,uPA治疗组ILK、α-SMA表达均被显著抑制(P<0.05);E-cadherin表达则增高(P<0.05)。结论ILK通过介导肾小管上皮细胞转分化而参与肾间质纤维化的发生发展。uPA能减轻肾小管间质纤维化,这可能与其抑制肾小管细胞ILK表达有关。展开更多
文摘We report a patient who presented with severe enterocolitis and apparent absence of Paneth, goblet, and enteroendocrine lineages from the small bowel and colon. The absorptive enterocyte seemed to be normal morphologically and functionally. Because normal enterocytes were present, we hypothesized that this patient had a developmental block in the differentiation of a common stem cell precursor for Paneth, goblet, and neuroendocrine lineages. By using antibodies to protein markers of each cell line, including some that are expressed early in the differentiation process, we aimed to study lineage development in this patient. From our data, we surmise that there may be a two-step process in lineage commitment. The stem cell may commit to an absorptive cell or a granule-containing cell. The daughter cell that is committed to the granule lineage then further commits to a goblet, enteroendocrine, or Paneth cell lineage.
文摘目的研究整合素连接激酶(ILK)在单侧输尿管梗阻(UUO)小鼠肾小管上皮细胞转分化中的作用及尿激酶对其的影响。方法将雄性CD-1小鼠随机分为假手术对照组(Sham,n=20)、UUO组(UUO,n=28)和尿激酶治疗组(uPA,n=28),分别于术后1、3、7和14d处死小鼠。Masson染色观察肾间质纤维化。免疫荧光和Western印迹检测小鼠肾组织ILK的分布及表达。免疫组化检测肾组织上皮细胞钙粘蛋白(E-cadherin)的表达。RT-PCR检测ILK、E-cadherin和α-平滑肌肌动蛋白(α-SMA)mRNA表达。结果与Sham组相比,UUO组术后1d ILK mRNA及蛋白表达均增高,7d达到高峰;E-cadherin mRNA及蛋白表达明显减少,α-SMA mRNA表达显著上调。与UUO组同时间点相比,uPA治疗组ILK、α-SMA表达均被显著抑制(P<0.05);E-cadherin表达则增高(P<0.05)。结论ILK通过介导肾小管上皮细胞转分化而参与肾间质纤维化的发生发展。uPA能减轻肾小管间质纤维化,这可能与其抑制肾小管细胞ILK表达有关。
