目的探讨白藜芦醇对脑胶质瘤细胞U251的增殖和上皮间质转化(EMT)的影响及对核转录子kappa B p65(NF-κB p65)通路的调节作用。方法将第3代对数生长期U251细胞随机分为对照组、白藜芦醇组、激动剂组和激动剂+白藜芦醇组,对照组细胞不做处...目的探讨白藜芦醇对脑胶质瘤细胞U251的增殖和上皮间质转化(EMT)的影响及对核转录子kappa B p65(NF-κB p65)通路的调节作用。方法将第3代对数生长期U251细胞随机分为对照组、白藜芦醇组、激动剂组和激动剂+白藜芦醇组,对照组细胞不做处理,白藜芦醇组细胞加入50μmol·L^(-1)白藜芦醇处理,激动剂组细胞加入1μg·mL^(-1)脂多糖(LPS)刺激,激动剂+白藜芦醇组细胞加入LPS 1μg·mL^(-1)刺激12 h后再用50μmol·L^(-1)白藜芦醇预处理12 h,MTT法检测细胞存活率,流式细胞仪检测细胞凋亡率,ELISA检测白细胞介素(IL)-6、IL-1β、肿瘤坏死因子α(TNF-α)含量,Transwell实验检测细胞侵袭能力以及蛋白印迹法检测上皮钙黏蛋白(E-cad)、神经钙黏蛋白(N-cad)、波形蛋白(vimentin)和p-p65蛋白相对表达量。结果与对照组比较,白藜芦醇组细胞存活率、IL-6、IL-1β、TNF-α含量以及N-cad、vimentin和p-p65蛋白相对表达量降低,侵袭细胞数减少,细胞凋亡率和E-cad蛋白相对表达量升高,激动剂组细胞存活率、IL-6、IL-1β、TNF-α含量以及N-cad、vimentin和p-p65蛋白相对表达量升高,侵袭细胞数增多,细胞凋亡率和E-cad蛋白相对表达量降低(P<0.05);与白藜芦醇组比较,激动剂+白藜芦醇组细胞存活率、IL-6、IL-1β、TNF-α含量以及N-cad、vimentin和p-p65蛋白相对表达量升高,侵袭细胞数增多,细胞凋亡率和E-cad蛋白相对表达量降低(P<0.05);与激动剂组比较,激动剂+白藜芦醇组细胞存活率、IL-6、IL-1β、TNF-α含量以及N-cad、vimentin和p-p65蛋白相对表达量降低,侵袭细胞数减少,细胞凋亡率以及E-cad蛋白相对表达量升高(P<0.05)。结论白藜芦醇可抑制脑胶质瘤细胞增殖和侵袭、促进其凋亡,其可能是通过抑制NF-κB信号通路减轻炎症反应、抑制上皮间质转化发挥调控作用的。展开更多
BACKGROUND Jianpi Gushen Huayu Decoction(JPGS)has been used to clinically treat diabetic nephropathy(DN)for many years.However,the protective mechanism of JPGS in treating DN remains unclear.AIM To evaluate the therap...BACKGROUND Jianpi Gushen Huayu Decoction(JPGS)has been used to clinically treat diabetic nephropathy(DN)for many years.However,the protective mechanism of JPGS in treating DN remains unclear.AIM To evaluate the therapeutic effects and the possible mechanism of JPGS on DN.METHODS We first evaluated the therapeutic potential of JPGS on a DN mouse model.We then investigated the effect of JPGS on the renal metabolite levels of DN mice using non-targeted metabolomics.Furthermore,we examined the effects of JPGS on c-Jun N-terminal kinase(JNK)/P38-mediated apoptosis and the inflammatory responses mediated by toll-like receptor 4(TLR4)/nuclear factor-kappa B(NF-κB)/NOD-like receptor family pyrin domain containing 3(NLRP3).RESULTS The ameliorative effects of JPGS on DN mice included the alleviation of renal injury and the control of inflammation and oxidative stress.Untargeted metabolomic analysis revealed that JPGS altered the metabolites of the kidneys in DN mice.A total of 51 differential metabolites were screened.Pathway analysis results indicated that nine pathways significantly changed between the control and model groups,while six pathways significantly altered between the model and JPGS groups.Pathways related to cysteine and methionine metabolism;alanine,tryptophan metabolism;aspartate and glutamate metabolism;and riboflavin metabolism were identified as the key pathways through which JPGS affects DN.Further experimental validation showed that JPGS treatment reduced the expression of TLR4/NF-κB/NLRP3 pathways and JNK/P38 pathway-mediated apoptosis related factors.CONCLUSION JPGS could markedly treat mice with streptozotocin(STZ)-induced DN,which is possibly related to the regulation of several metabolic pathways found in kidneys.Furthermore,JPGS could improve kidney inflammatory responses and ameliorate kidney injuries in DN mice via the TLR4/NF-κB/NLRP3 pathway and inhibit JNK/P38 pathwaymediated apoptosis in DN mice.展开更多
Nuclear factor kappa B(NF-κB) is one of the best-characterized transcription factors playing important roles in many cellular responses to a large variety of stimuli,including inflammatory cytokines, phorbol esters, ...Nuclear factor kappa B(NF-κB) is one of the best-characterized transcription factors playing important roles in many cellular responses to a large variety of stimuli,including inflammatory cytokines, phorbol esters, growth factors, and bacterial and viral products. The aim of this study is to demonstrate NF-κB expression in the mouse cochlea and its enhancement in response to lipopolysaccharides(LPS) and kanamycin(KA) treatment. Methods KA treatment consisted of subcutaneous KA injections at 700 mg/kg twice a day with an eight-hour interval between the two injections for 3 or 7 days. For animals in the LPS treatment group, a single dose of 0.3 mg LPS dissolved in 0.2 ml sterile saline were injected into both bullae through the tympanic membrane and kept there for 3 hours. Animals in the control group received subcutaneous saline injection for 7 days. Following immmunohistochemichal processing with rabbit polyclonal anti-NF-κB p65 antibodies, cryosections of the cochlea were examined for expression of NF-κB p65 in various structures in the cochlea. Results NF-κB p65 expression, identified by presence of brown reaction products characteristic of DAB immunohistochemistry, was visible in the spiral ligament, spiral prominence, tectorial membrane(TM), spiral ganglion and nerve fibers. Relatively weak NF-κB p65 expression was also visualized in the organ of Corti. Within the organ of Corti, the inner hair cells(IHC), outer hair cells(OHC), inner pillar cells(IP), outer pillar cells (OP), Deiter’s cells(DC), and Boettcher’s cells exhibited stronger staining than the inner sulcus cells, Hensen’s cells(HC) and Claudius’cells. No NF-κB p65 expression was seen in the nucleus of the IHC and OHC. NF-κB p65 expression was increased in animals exposed to LPS or KA, demonstrating significant differences in the staining between control animals and LPS/KA-treated animals. NF-κB p65 expression was not significantly different between LPS treated and KA treated animals or between 3 and 7 days in KA-treated animals. Conclusion LPS and KA exposure increases expression of NF-κB p65 in the mouse cochlea.展开更多
目的研究姜黄素对高脂诱导的非酒精性脂肪性肝病(NAFLD)中肝过氧化物酶体增殖物激活受体γ(PPAR-γ)和核因子κB(NF-κB)p65 m RNA及蛋白表达的影响。方法建立大鼠NAFLD模型,按照随机化原则分为5组:正常组、模型组、低剂量治疗组、中剂...目的研究姜黄素对高脂诱导的非酒精性脂肪性肝病(NAFLD)中肝过氧化物酶体增殖物激活受体γ(PPAR-γ)和核因子κB(NF-κB)p65 m RNA及蛋白表达的影响。方法建立大鼠NAFLD模型,按照随机化原则分为5组:正常组、模型组、低剂量治疗组、中剂量治疗组、高剂量治疗组。正常组给予普通饮食,其余4组给予高脂饮食,同时分别用羧甲基纤维素钠(CMC)和低、中、高剂量姜黄素进行治疗。持续治疗12周后,处死各组大鼠并进行处理分析。血清生物化学方法检测大鼠血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)、甘油三酯(TG)和总胆固醇(TC)的含量;HE染色对大鼠肝组织进行病理学观察;免疫组织化学检测大鼠肝组织PPAR-γ和NF-κB p65蛋白的表达情况;RT-PCR检测PPAR-γ和NF-κB p65 m RNA的表达情况。结果治疗组(低、中、高剂量)大鼠血清中ALT、AST、TG、TC含量较模型组明显降低(P<0.05)。治疗组(低、中、高剂量)大鼠肝组织的脂肪变性程度较模型组明显减轻。与正常组比较,模型组肝组织PPAR-γm RNA及蛋白的表达水平均明显降低(P<0.05),而NF-κB p65 m RNA及蛋白的表达水平均明显升高(P<0.05)。与模型组比较,治疗组(低、中、高剂量)大鼠肝组织PPAR-γ的表达明显增加(P<0.05),PPAR-γ的表达水平以高剂量治疗组升高更加明显(P<0.01);与模型组相比,治疗组(低、中、高剂量)大鼠肝组织NF-κB p65的表达显著减少(P<0.05),NF-κB p65的表达水平以高剂量治疗组降低更加明显(P<0.01)。结论姜黄素可明显减轻高脂诱导的大鼠NAFLD肝组织的脂肪变性和炎性反应,其抗脂肪变性和抗炎的机制可能与姜黄素激活PPAR-γ的表达,从而抑制NF-κB p65的活性有关。PPAR-γ和NF-κB p65的表达参与了NAFLD的发生发展,控制这些信号分子的表达可能是姜黄素治疗NAFLD的重要机制之一。展开更多
基金Supported by the Scientific Foundation of Administration of Traditional Chinese Medicine of Hebei Province,China,No.2023257.
文摘BACKGROUND Jianpi Gushen Huayu Decoction(JPGS)has been used to clinically treat diabetic nephropathy(DN)for many years.However,the protective mechanism of JPGS in treating DN remains unclear.AIM To evaluate the therapeutic effects and the possible mechanism of JPGS on DN.METHODS We first evaluated the therapeutic potential of JPGS on a DN mouse model.We then investigated the effect of JPGS on the renal metabolite levels of DN mice using non-targeted metabolomics.Furthermore,we examined the effects of JPGS on c-Jun N-terminal kinase(JNK)/P38-mediated apoptosis and the inflammatory responses mediated by toll-like receptor 4(TLR4)/nuclear factor-kappa B(NF-κB)/NOD-like receptor family pyrin domain containing 3(NLRP3).RESULTS The ameliorative effects of JPGS on DN mice included the alleviation of renal injury and the control of inflammation and oxidative stress.Untargeted metabolomic analysis revealed that JPGS altered the metabolites of the kidneys in DN mice.A total of 51 differential metabolites were screened.Pathway analysis results indicated that nine pathways significantly changed between the control and model groups,while six pathways significantly altered between the model and JPGS groups.Pathways related to cysteine and methionine metabolism;alanine,tryptophan metabolism;aspartate and glutamate metabolism;and riboflavin metabolism were identified as the key pathways through which JPGS affects DN.Further experimental validation showed that JPGS treatment reduced the expression of TLR4/NF-κB/NLRP3 pathways and JNK/P38 pathway-mediated apoptosis related factors.CONCLUSION JPGS could markedly treat mice with streptozotocin(STZ)-induced DN,which is possibly related to the regulation of several metabolic pathways found in kidneys.Furthermore,JPGS could improve kidney inflammatory responses and ameliorate kidney injuries in DN mice via the TLR4/NF-κB/NLRP3 pathway and inhibit JNK/P38 pathwaymediated apoptosis in DN mice.
文摘Nuclear factor kappa B(NF-κB) is one of the best-characterized transcription factors playing important roles in many cellular responses to a large variety of stimuli,including inflammatory cytokines, phorbol esters, growth factors, and bacterial and viral products. The aim of this study is to demonstrate NF-κB expression in the mouse cochlea and its enhancement in response to lipopolysaccharides(LPS) and kanamycin(KA) treatment. Methods KA treatment consisted of subcutaneous KA injections at 700 mg/kg twice a day with an eight-hour interval between the two injections for 3 or 7 days. For animals in the LPS treatment group, a single dose of 0.3 mg LPS dissolved in 0.2 ml sterile saline were injected into both bullae through the tympanic membrane and kept there for 3 hours. Animals in the control group received subcutaneous saline injection for 7 days. Following immmunohistochemichal processing with rabbit polyclonal anti-NF-κB p65 antibodies, cryosections of the cochlea were examined for expression of NF-κB p65 in various structures in the cochlea. Results NF-κB p65 expression, identified by presence of brown reaction products characteristic of DAB immunohistochemistry, was visible in the spiral ligament, spiral prominence, tectorial membrane(TM), spiral ganglion and nerve fibers. Relatively weak NF-κB p65 expression was also visualized in the organ of Corti. Within the organ of Corti, the inner hair cells(IHC), outer hair cells(OHC), inner pillar cells(IP), outer pillar cells (OP), Deiter’s cells(DC), and Boettcher’s cells exhibited stronger staining than the inner sulcus cells, Hensen’s cells(HC) and Claudius’cells. No NF-κB p65 expression was seen in the nucleus of the IHC and OHC. NF-κB p65 expression was increased in animals exposed to LPS or KA, demonstrating significant differences in the staining between control animals and LPS/KA-treated animals. NF-κB p65 expression was not significantly different between LPS treated and KA treated animals or between 3 and 7 days in KA-treated animals. Conclusion LPS and KA exposure increases expression of NF-κB p65 in the mouse cochlea.
文摘目的研究姜黄素对高脂诱导的非酒精性脂肪性肝病(NAFLD)中肝过氧化物酶体增殖物激活受体γ(PPAR-γ)和核因子κB(NF-κB)p65 m RNA及蛋白表达的影响。方法建立大鼠NAFLD模型,按照随机化原则分为5组:正常组、模型组、低剂量治疗组、中剂量治疗组、高剂量治疗组。正常组给予普通饮食,其余4组给予高脂饮食,同时分别用羧甲基纤维素钠(CMC)和低、中、高剂量姜黄素进行治疗。持续治疗12周后,处死各组大鼠并进行处理分析。血清生物化学方法检测大鼠血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)、甘油三酯(TG)和总胆固醇(TC)的含量;HE染色对大鼠肝组织进行病理学观察;免疫组织化学检测大鼠肝组织PPAR-γ和NF-κB p65蛋白的表达情况;RT-PCR检测PPAR-γ和NF-κB p65 m RNA的表达情况。结果治疗组(低、中、高剂量)大鼠血清中ALT、AST、TG、TC含量较模型组明显降低(P<0.05)。治疗组(低、中、高剂量)大鼠肝组织的脂肪变性程度较模型组明显减轻。与正常组比较,模型组肝组织PPAR-γm RNA及蛋白的表达水平均明显降低(P<0.05),而NF-κB p65 m RNA及蛋白的表达水平均明显升高(P<0.05)。与模型组比较,治疗组(低、中、高剂量)大鼠肝组织PPAR-γ的表达明显增加(P<0.05),PPAR-γ的表达水平以高剂量治疗组升高更加明显(P<0.01);与模型组相比,治疗组(低、中、高剂量)大鼠肝组织NF-κB p65的表达显著减少(P<0.05),NF-κB p65的表达水平以高剂量治疗组降低更加明显(P<0.01)。结论姜黄素可明显减轻高脂诱导的大鼠NAFLD肝组织的脂肪变性和炎性反应,其抗脂肪变性和抗炎的机制可能与姜黄素激活PPAR-γ的表达,从而抑制NF-κB p65的活性有关。PPAR-γ和NF-κB p65的表达参与了NAFLD的发生发展,控制这些信号分子的表达可能是姜黄素治疗NAFLD的重要机制之一。
