The pathogenesis of both entities of inflammatory bowel disease (IBD), namely Crohn's disease (CD) and ulcerative colitis (UC), is still complex and under investigation. The importance of the microbial flora in de...The pathogenesis of both entities of inflammatory bowel disease (IBD), namely Crohn's disease (CD) and ulcerative colitis (UC), is still complex and under investigation. The importance of the microbial flora in developing IBD is beyond debate. In the last few years, the focus has changed from adaptive towards innate immunity. Crohn's ileitis is associated with a deficiency of the antimicrobial shield, as shown by a reduced expression and secretion of the Paneth cell defensin HD5 and HD6, which is related to a Paneth cell differentiation defect mediated by a diminished expression of the Wnt transcription factor TCF4. In UC, the protective mucus layer, acting as a physical and chemical barrier between the gut epithelium and the luminal microbes, is thin- ner and in part denuded as compared to controls. This could be caused by a missing induction of the goblet cell differentiation factors Hath1 and KLF4 leading to immature goblet cells. This defective Paneth and goblet cell differentiation in Crohn's ileitis and UC may enablethe luminal microbes to invade the mucosa and trigger the inflammation. The exact molecular mechanisms behind ileal CD and also UC must be further clarified, but these observations could give rise to new therapeutic strategies based on a stimulation of the protective innate immune system.展开更多
The developmental process from a fertilized egg to a grown adult is programmed with remarkable accuracy. While the genetic information of the fertilized egg and its descendent somatic cells are the same, it is the sel...The developmental process from a fertilized egg to a grown adult is programmed with remarkable accuracy. While the genetic information of the fertilized egg and its descendent somatic cells are the same, it is the selective expressions of the same genome that give rise to the 200 or so different cell types in an adult.展开更多
Objective: To further explore the function of combine use of tetramethylpyrazine(TMP) and cisplatin(DDP) in lung carcinoma. Methods: We used the combination drug to treat Lewis lung cancer mice, investigated the expre...Objective: To further explore the function of combine use of tetramethylpyrazine(TMP) and cisplatin(DDP) in lung carcinoma. Methods: We used the combination drug to treat Lewis lung cancer mice, investigated the expression level of vascular endothelial growth factor(VEGF), Kruppel-like factor 4(KLF4) and A disintegrin and metalloproteinase with thrombospondin motifs 1(ADAMTS1) and to further explore the inhibitory effects and potential mechanism of TMP combined with DDP on tumor angiogenesis. Results: The tumor growth was suppressed in TMP group, DDP group and TMP combined with DDP group. Furthermore, the weights and volume of tumor, the expression level of VEGF, KLF4 and ADAMTS1 were found significantly changed between experiment group and control group. These findings suggest that TMP with DDP had additional or synergistic effects to inhibit the tumor growth effectively, might be achieved through reducing the expression of angiogenesis promoting factor VEGF and increasing expression of angiogenesis inhibitors KLF4 and ADAMTS1. Conclusion: KLF4 and ADAMTS1 may be synergically involved in the angiogenesis in mouse Lewis lung cancer through the different signal ways.展开更多
目的检测肥胖大鼠网膜脂肪组织KLF4及KLF7 m RNA表达水平,分析其与炎症的相关性。方法 Wistar健康雄性大鼠高脂喂养,诱导肥胖模型。高脂喂养后第4、10周检测大鼠血脂、血糖水平;ELISA法测定血浆中TNF-α、LPT、APN水平;10周后,q RT-PCR...目的检测肥胖大鼠网膜脂肪组织KLF4及KLF7 m RNA表达水平,分析其与炎症的相关性。方法 Wistar健康雄性大鼠高脂喂养,诱导肥胖模型。高脂喂养后第4、10周检测大鼠血脂、血糖水平;ELISA法测定血浆中TNF-α、LPT、APN水平;10周后,q RT-PCR法检测网膜脂肪组织KLF4、KLF7及NF-κB炎症信号通路关键因子m RNA表达水平。结果高脂喂养4周后,实验组大鼠体质量开始显著高于对照组,第10周实验组大鼠体质量进入平台期,但仍高于对照组(P<0.05)。高脂喂养第4及第10周,实验组大鼠血浆FFA、Glu、TG、TC、LDL、TNF-α水平高于对照组,LPT、APN水平低于对照组(P<0.05)。网膜脂肪组织中,实验组TLR9、KLF4 m RNA表达水平低于对照组,KLF7、SRC和IL-6 m RNA表达水平高于对照组;TLR9与血浆FFA负相关,与KLF4正相关;KLF4与SRC、NF-κB负相关;KLF7与TLR4、SRC、NF-κB和IL-6正相关,与KLF4负相关(P<0.05)。结论肥胖状态下,高水平的FFA一方面可与TLR4结合上调KLF7表达,促进炎症因子表达,导致释放组织发生炎症;同时,可抑制TLR9水平而下调KLF4表达,减弱KLF4对炎症信号通路关键因子的抑制作用,从而促进炎症反应。展开更多
基金Supported by The Robert Bosch Foundation Stuttgart Germany and the Emmy Noether program (Wehkamp J) of the Deutsche Forschungsgemeinschaft (DFG)
文摘The pathogenesis of both entities of inflammatory bowel disease (IBD), namely Crohn's disease (CD) and ulcerative colitis (UC), is still complex and under investigation. The importance of the microbial flora in developing IBD is beyond debate. In the last few years, the focus has changed from adaptive towards innate immunity. Crohn's ileitis is associated with a deficiency of the antimicrobial shield, as shown by a reduced expression and secretion of the Paneth cell defensin HD5 and HD6, which is related to a Paneth cell differentiation defect mediated by a diminished expression of the Wnt transcription factor TCF4. In UC, the protective mucus layer, acting as a physical and chemical barrier between the gut epithelium and the luminal microbes, is thin- ner and in part denuded as compared to controls. This could be caused by a missing induction of the goblet cell differentiation factors Hath1 and KLF4 leading to immature goblet cells. This defective Paneth and goblet cell differentiation in Crohn's ileitis and UC may enablethe luminal microbes to invade the mucosa and trigger the inflammation. The exact molecular mechanisms behind ileal CD and also UC must be further clarified, but these observations could give rise to new therapeutic strategies based on a stimulation of the protective innate immune system.
文摘The developmental process from a fertilized egg to a grown adult is programmed with remarkable accuracy. While the genetic information of the fertilized egg and its descendent somatic cells are the same, it is the selective expressions of the same genome that give rise to the 200 or so different cell types in an adult.
基金supported by the Key Project of Medical Science of Hebei Province(No.20170185)
文摘Objective: To further explore the function of combine use of tetramethylpyrazine(TMP) and cisplatin(DDP) in lung carcinoma. Methods: We used the combination drug to treat Lewis lung cancer mice, investigated the expression level of vascular endothelial growth factor(VEGF), Kruppel-like factor 4(KLF4) and A disintegrin and metalloproteinase with thrombospondin motifs 1(ADAMTS1) and to further explore the inhibitory effects and potential mechanism of TMP combined with DDP on tumor angiogenesis. Results: The tumor growth was suppressed in TMP group, DDP group and TMP combined with DDP group. Furthermore, the weights and volume of tumor, the expression level of VEGF, KLF4 and ADAMTS1 were found significantly changed between experiment group and control group. These findings suggest that TMP with DDP had additional or synergistic effects to inhibit the tumor growth effectively, might be achieved through reducing the expression of angiogenesis promoting factor VEGF and increasing expression of angiogenesis inhibitors KLF4 and ADAMTS1. Conclusion: KLF4 and ADAMTS1 may be synergically involved in the angiogenesis in mouse Lewis lung cancer through the different signal ways.
文摘目的检测肥胖大鼠网膜脂肪组织KLF4及KLF7 m RNA表达水平,分析其与炎症的相关性。方法 Wistar健康雄性大鼠高脂喂养,诱导肥胖模型。高脂喂养后第4、10周检测大鼠血脂、血糖水平;ELISA法测定血浆中TNF-α、LPT、APN水平;10周后,q RT-PCR法检测网膜脂肪组织KLF4、KLF7及NF-κB炎症信号通路关键因子m RNA表达水平。结果高脂喂养4周后,实验组大鼠体质量开始显著高于对照组,第10周实验组大鼠体质量进入平台期,但仍高于对照组(P<0.05)。高脂喂养第4及第10周,实验组大鼠血浆FFA、Glu、TG、TC、LDL、TNF-α水平高于对照组,LPT、APN水平低于对照组(P<0.05)。网膜脂肪组织中,实验组TLR9、KLF4 m RNA表达水平低于对照组,KLF7、SRC和IL-6 m RNA表达水平高于对照组;TLR9与血浆FFA负相关,与KLF4正相关;KLF4与SRC、NF-κB负相关;KLF7与TLR4、SRC、NF-κB和IL-6正相关,与KLF4负相关(P<0.05)。结论肥胖状态下,高水平的FFA一方面可与TLR4结合上调KLF7表达,促进炎症因子表达,导致释放组织发生炎症;同时,可抑制TLR9水平而下调KLF4表达,减弱KLF4对炎症信号通路关键因子的抑制作用,从而促进炎症反应。
