目的探讨炎调方调过Fas/Caspase-8信号通路减轻脓毒症急性胃肠损伤小鼠炎症的机制。方法取70只BALB/c小鼠随机分为空白组、假手术组和造模小鼠组。通过盲肠结扎穿孔术(cecum ligation and puncture,CLP)构建脓毒症急性胃肠损伤小鼠模型...目的探讨炎调方调过Fas/Caspase-8信号通路减轻脓毒症急性胃肠损伤小鼠炎症的机制。方法取70只BALB/c小鼠随机分为空白组、假手术组和造模小鼠组。通过盲肠结扎穿孔术(cecum ligation and puncture,CLP)构建脓毒症急性胃肠损伤小鼠模型,将造模成功的小鼠随机分为模型组,炎调方低、中、高剂量组,ROCK抑制剂组。苏木素-伊红(HE)染色观察小鼠回肠组织病理学改变;ELISA法检测各组小鼠血清IL-17、IL-23水平;蛋白印迹法检测回肠组织Fas/Caspase-8信号通路蛋白Fas、FADD和Caspase-8的相对表达;TUNEL染色法检测回肠组织细胞凋亡情况。结果与空白组相比,模型组小鼠回肠组织肠黏膜萎缩明显、绒毛排列杂乱,可见断裂、脱落,上皮细胞细胞坏死脱落,炎症细胞浸润明显,小鼠血清中IL-17、IL-23水平升高(P<0.05),回肠组织中Fas、FADD和Caspase-8蛋白的表达升高(P<0.05),肠上皮细胞呈现明显的凋亡现象(P<0.05)。与模型组相比,炎调方组小鼠的回肠组织病理学改变均得到不同程度的改善,血清中IL-17、IL-23水平降低(P<0.05),且回肠组织中Fas、FADD和Caspase-8蛋白的表达降低(P<0.05),肠上皮细胞凋亡减少(P<0.05)。结论炎调方可以减轻肠黏膜组织损伤和肠道组织炎症反应,可能是通过调控Fas/Caspase-8信号通路抑制脓毒症急性胃肠损伤小鼠的肠上皮细胞凋亡来发挥作用的。展开更多
To explore high value-added utilization pathways of fly ash,the mesoporous structure of silicon dioxide extracted from fly ash(FA-SiO_(2))was utilized to restrict the dicyandiamide(DCDA)thermal degradation process.Thi...To explore high value-added utilization pathways of fly ash,the mesoporous structure of silicon dioxide extracted from fly ash(FA-SiO_(2))was utilized to restrict the dicyandiamide(DCDA)thermal degradation process.This produced chemically bonded interacting composite photocatalysts of FA-SiO,and graphitic-phase carbon nitride(g-C_(3)N_(4)).Compared with the spherical silicon dioxide prepared using tetraethyl orthosilicate(TEOS-SiO_(2)),the mesoporous structure of FA-SiO_(2),allowed DCDA to react in a smaller space,which facilitated the transformation of DCDA to melamine by the thermal degradation kinetics of FA-C_(3)N_(4)/DCDA.This ultimately boosted the formation of an N-atom-removed triazine ring structure and a multistage structure combining lumps and rods in the composite photocatalysts of g-C_(3)N_(4),and FA-SiO_(2),which led to a higher visible-light utilization efficiency,a suitable valence-band position,and the photocatalytic activity for methylene blue reaching 3.56 times that of g-C_(3)N_(4).The findings indicate that mesoporous FA-SiO,has the potential to improve the structural and photocatalytic properties of g-C_(3)N_(4),-based materials.展开更多
文摘目的探讨炎调方调过Fas/Caspase-8信号通路减轻脓毒症急性胃肠损伤小鼠炎症的机制。方法取70只BALB/c小鼠随机分为空白组、假手术组和造模小鼠组。通过盲肠结扎穿孔术(cecum ligation and puncture,CLP)构建脓毒症急性胃肠损伤小鼠模型,将造模成功的小鼠随机分为模型组,炎调方低、中、高剂量组,ROCK抑制剂组。苏木素-伊红(HE)染色观察小鼠回肠组织病理学改变;ELISA法检测各组小鼠血清IL-17、IL-23水平;蛋白印迹法检测回肠组织Fas/Caspase-8信号通路蛋白Fas、FADD和Caspase-8的相对表达;TUNEL染色法检测回肠组织细胞凋亡情况。结果与空白组相比,模型组小鼠回肠组织肠黏膜萎缩明显、绒毛排列杂乱,可见断裂、脱落,上皮细胞细胞坏死脱落,炎症细胞浸润明显,小鼠血清中IL-17、IL-23水平升高(P<0.05),回肠组织中Fas、FADD和Caspase-8蛋白的表达升高(P<0.05),肠上皮细胞呈现明显的凋亡现象(P<0.05)。与模型组相比,炎调方组小鼠的回肠组织病理学改变均得到不同程度的改善,血清中IL-17、IL-23水平降低(P<0.05),且回肠组织中Fas、FADD和Caspase-8蛋白的表达降低(P<0.05),肠上皮细胞凋亡减少(P<0.05)。结论炎调方可以减轻肠黏膜组织损伤和肠道组织炎症反应,可能是通过调控Fas/Caspase-8信号通路抑制脓毒症急性胃肠损伤小鼠的肠上皮细胞凋亡来发挥作用的。
基金supported by the Medical Special Cultivation Project of Anhui University of Science and Technology(Nos.YZ2023H2B013 and YZ2023H2B012),China.
文摘To explore high value-added utilization pathways of fly ash,the mesoporous structure of silicon dioxide extracted from fly ash(FA-SiO_(2))was utilized to restrict the dicyandiamide(DCDA)thermal degradation process.This produced chemically bonded interacting composite photocatalysts of FA-SiO,and graphitic-phase carbon nitride(g-C_(3)N_(4)).Compared with the spherical silicon dioxide prepared using tetraethyl orthosilicate(TEOS-SiO_(2)),the mesoporous structure of FA-SiO_(2),allowed DCDA to react in a smaller space,which facilitated the transformation of DCDA to melamine by the thermal degradation kinetics of FA-C_(3)N_(4)/DCDA.This ultimately boosted the formation of an N-atom-removed triazine ring structure and a multistage structure combining lumps and rods in the composite photocatalysts of g-C_(3)N_(4),and FA-SiO_(2),which led to a higher visible-light utilization efficiency,a suitable valence-band position,and the photocatalytic activity for methylene blue reaching 3.56 times that of g-C_(3)N_(4).The findings indicate that mesoporous FA-SiO,has the potential to improve the structural and photocatalytic properties of g-C_(3)N_(4),-based materials.
