Psoriasis is a chronic autoimmune disease featured by patches on the skin.It is caused by malfunction of immune cells and keratinocytes with inflammation as one of its key features.Apigenin(API)is a natural flavonoid ...Psoriasis is a chronic autoimmune disease featured by patches on the skin.It is caused by malfunction of immune cells and keratinocytes with inflammation as one of its key features.Apigenin(API)is a natural flavonoid with anti-inflammatory and immunoregulatory properties.Therefore,we speculated that API can ameliorate psoriasis,and determined its effect on the development of psoriasis by using imiquimod(IMQ)-induced psoriasis mouse model.Our results showed that API attenuated IMQ-induced phenotypic changes,such as erythema,scaling and epidermal thickening,and improved splenic hyperplasia.Abnormal differentiation of immune cells was restored in API-treated mice.Mechanistically,we revealed that API is a key regulator of signal transducer activator of transcription 3(STAT3).API regulated immune responses by reducing interleukin-23(IL-23)/STAT3/IL-17A axis.Moreover,it suppressed IMQ-caused cell hyperproliferation by inactivating STAT3 through regulation of extracellular signal-regulated kinase 1/2 and nuclear factor-κB(NF-κB)pathway.Furthermore,API reduced expression of inflammatory cytokines through inactivation of NF-κB.Taken together,our study demonstrates that API can ameliorate psoriasis and may be considered as a strategy for psoriasis treatment.展开更多
Objective: To investigate the effects of Yanghe Pingchuan Granules on airway remodeling in asthmatic rats, and to explore the mechanism of Interleukin-6/Janus kinase 2/ Signal transducing activator of transcription 3(...Objective: To investigate the effects of Yanghe Pingchuan Granules on airway remodeling in asthmatic rats, and to explore the mechanism of Interleukin-6/Janus kinase 2/ Signal transducing activator of transcription 3(IL-6/JAK2/STAT3) signal axis. Methods: We separated 42 healthy male SD rats into two groups, a control group (7) and a model group (35).The model group was sensitized with a combination of ovalbumin (OVA) and aluminum hydroxide for 2 weeks, while the control group was given an equal amount of physiological saline.After 2 weeks, the modeling group was randomly divided into Model group, Yanghe Pingchuan Granules high, medium and low dose groups and Dexamethasone group, each group consisted of 7 animals. After 4 weeks, OVA atomization and gavage were used for stimulation and treatment. Yanghe Pingchuan Granules high, middle and low groups were given 15.48, 7.74, 3.87 g∙kg-1 Yanghe Pingchuan Granules daily, dexamethasone group was given 0.0625 mg∙kg-1 dexamethasone daily, and the other groups were given the same amount of normal saline. HE, PAS and Masson staining were used to observe the lung histopathological changes in rats. The levels of interleukin-6, IL-23 and IL-17A were detected by ELISA. The expression levels of JAK-2, P-JAK2, STAT3 and P-STAT3 in lung tissues were detected by Western blot. Real-time quantitative polymerase chain reaction (qRT-PCR) was used to detect the mRNA expression levels of IL-6, JAK2 and STAT3 in rat lung tissue. Results: The lung tissue structure of the model group was severely damaged compared to the control group, accompanied by a great many of inflammatory cell infiltration, goblet cell hyperplasia, subepithelial collagen fiber deposition and airway epithelial thickening were more obvious. The expressions of IL-6, IL- 23 and IL-17A in serum were significantly increased (P<0.01), the protein expression levels of JAK-2, P-JAK2, STAT3 and P-STAT3 and the mRNA expression levels of IL-6, JAK2 and STAT3 in lung tissue were significantly increased (P<0.01);Compared with the model group, inflammatory cell infiltration, goblet cell proliferation, subepithelial collagen fiber deposition and airway epithelial thickening were significantly reduced in each administration group, and the expressions of IL-6, IL-23 and IL-17A in serum were significantly decreased (P< 0.01). The protein expression levels of JAK-2, P-JAK2, STAT3 and P-STAT3 and mRNA expression levels of IL-6, JAK2 and STAT3 in lung tissue were significantly decreased (P<0.01). Conclusion: Yanghe Pingchuan Granules can significantly alleviate airway remodeling in asthmatic rats, and its mechanism may be through inhibiting the IL-6/JAK2/STAT3 signal axis.展开更多
目的研究通痹颗粒对胶原诱导性关节炎(collagen-induced arthritis,CIA)大鼠铁调素(hepcidin,Hepc)、Janus激酶(janus kinase,JAK)2/信号转导子和转录激活子(signal transduction and activator of transcription,STAT)3信号通路的影响...目的研究通痹颗粒对胶原诱导性关节炎(collagen-induced arthritis,CIA)大鼠铁调素(hepcidin,Hepc)、Janus激酶(janus kinase,JAK)2/信号转导子和转录激活子(signal transduction and activator of transcription,STAT)3信号通路的影响。方法选取36只雌性SD大鼠随机分成空白组、模型组、阳性对照组和通痹颗粒低、中、高剂量组,每组6只。空白组不予处理,其余组用牛Ⅱ型胶原建立CIA模型。造模完成后,空白组、模型组予生理盐水灌胃,其余各组分别以巴瑞替尼片和低、中、高剂量通痹颗粒灌胃。每天1次,连续4周。HE染色行滑膜组织病理学观察;酶联免疫吸附法测定血清Hepc、白细胞介素6(interleukin 6,IL-6)水平;逆转录-聚合酶链反应法测定滑膜中JAK2、STAT3、细胞信号因子传导抑制体(suppressor of cytokine signaling,SOCS)1、SOCS3的mRNA相对表达量;Western blot法检测滑膜中JAK2、p-JAK2、STAT3、p-STAT3、SOCS1、SOCS3的蛋白表达量。结果模型组见滑膜上皮结构缺损,滑膜重度增生,排列紊乱,并有大量炎症细胞浸润和多个血管翳形成;各给药组滑膜炎症均有所减轻,阳性对照组优于通痹颗粒高剂量组,通痹颗粒中、高剂量组优于低剂量组。与模型组相比,各给药组关节炎指数评分、血清Hepc和IL-6水平均显著降低(P<0.01);与阳性对照组相比,通痹颗粒中、低剂量组关节炎指数评分、血清Hepc和IL-6水平均升高(P<0.05)。与模型组比较,阳性对照组和通痹颗粒低、中、高剂量组JAK2、STAT3 mRNA和蛋白以及p-JAK2、p-STAT3的蛋白表达量均降低(P<0.05),而通路抑制因子SOCS1、SOCS3 mRNA和蛋白的表达均升高(P<0.05);与阳性对照组比较,通痹颗粒各剂量组JAK2、STAT3 mRNA和蛋白以及p-JAK2、p-STAT3的蛋白表达量均升高(P<0.05),而SOCS1、SOCS3 mRNA和蛋白的表达均降低(P<0.05)。结论通痹颗粒能够改善CIA大鼠滑膜炎症,其机制可能与抑制JAK2/STAT3信号通路而减少Hepc的表达有关。展开更多
目的:探讨鸢尾素调节Janus蛋白酪氨酸激酶2(Janus protein tyrosine kinase 2,JAK2)/信号转导和转录激活子3(Signal transduction and activator of transcription 3,STAT3)信号通路对牙周炎大鼠牙周组织损伤的影响。方法:通过结扎和接...目的:探讨鸢尾素调节Janus蛋白酪氨酸激酶2(Janus protein tyrosine kinase 2,JAK2)/信号转导和转录激活子3(Signal transduction and activator of transcription 3,STAT3)信号通路对牙周炎大鼠牙周组织损伤的影响。方法:通过结扎和接种牙龈卟啉单胞菌液建立牙周炎大鼠模型,将大鼠随机分为模型组、鸢尾素低(鸢尾素-L,50 mg/kg)、中(鸢尾素-M,100 mg/kg)、高剂量(鸢尾素-H,200 mg/kg)组、鸢尾素-H+激活剂(200 mg/kg鸢尾素+2 mg/kg香豆霉素)组,每组10只,并以注射等体积生理盐水的正常大鼠对照组。干预结束后,对大鼠牙龈出血指数、牙齿松动度评分;牙槽骨吸收、肿瘤坏死因子-α(Tumor necrosis factor-α,TNF-α)、白细胞介素(Interleukin,IL)-6、IL-1β以及丙二醛(Malondialdehyde,MDA)、超氧化物歧化酶(Superoxide dismutase,SOD)水平分别以Micro-CT试剂盒检测;HE检测牙周组织病理学变化;Western blot检测JAK2、STAT3、p-JAK2、p-STAT3蛋白表达。结果:与对照组相比,模型组大鼠牙周组织被破坏,炎性浸润严重,牙龈出血指数、牙齿松动度评分、牙槽骨吸收、TNF-α、IL-6、IL-1β、MDA水平、p-JAK2/JAK2、p-STAT3/STAT3表达显著增加,SOD水平显著降低(P<0.05);与模型组相比,不同剂量的鸢尾素组大鼠病理损伤得到改善,牙龈出血指数、牙齿松动度评分、牙槽骨吸收、TNF-α、IL-6、IL-1β、MDA水平、p-JAK2/JAK2、p-STAT3/STAT3表达显著降低,SOD水平显著增加,具有剂量依赖性(P<0.05);与鸢尾素-H组相比,鸢尾素-H组+激活剂组大鼠病理损伤加重,大鼠牙龈出血指数、牙齿松动度评分、牙槽骨吸收、TNF-α、IL-6、IL-1β、MDA水平、p-JAK2/JAK2、p-STAT3/STAT3表达显著增加,SOD水平显著降低(P<0.05)。结论:鸢尾素抑制牙周炎大鼠氧化应激、炎性反应,减轻大鼠牙周组织损伤,减少牙槽骨吸收,可能与抑制JAK2/STAT3信号通路有关。展开更多
[目的]研究鹿红方改善心肌梗死后心肌纤维化的作用机制。[方法]采用冠状动脉结扎法制备心肌梗死后心肌纤维化模型。将60只SD大鼠随机分配至假手术组、模型组、鹿红方组以及培哚普利组,干预4周后用心脏彩色多普勒超声检查测量心脏结构和...[目的]研究鹿红方改善心肌梗死后心肌纤维化的作用机制。[方法]采用冠状动脉结扎法制备心肌梗死后心肌纤维化模型。将60只SD大鼠随机分配至假手术组、模型组、鹿红方组以及培哚普利组,干预4周后用心脏彩色多普勒超声检查测量心脏结构和左室射血分数,苏木精-伊红(hematoxylin-eosin,HE)染色、Masson和天狼星红染色观察心脏组织纤维化病理改变,免疫印迹检测心脏信号转导及转录激活因子3(signal transducer and activator of transcription 3,STAT3)分泌情况,酶联免疫吸附分析(enzymelinked immunosorbent assay,ELISA)检测血清促纤维化因子结缔组织生长因子(connective tissue growth factor,CTGF)、血小板反应蛋白-1(thrombospondin-1,TSP-1)、基质金属蛋白酶抑制剂-1(tissue inhibitor of metalloproteinase-1,TIMP-1)的水平。[结果]心脏彩色多普勒超声检查提示,与模型组比较,鹿红方和培哚普利干预均可抑制左室舒张末容积和左室舒张末内径的增大,而且使左室射血分数明显提升(P<0.05)。与培哚普利组比较,鹿红方组改善心室不良扩大与提高左室射血分数作用相近。HE染色结果显示,与模型组比较,鹿红方组和培哚普利组异常形态的心肌细胞数目明显减少,细胞间质肿胀减轻,炎症细胞浸润减少。Masson和天狼星红染色结果显示,与模型组比较,鹿红方组和培哚普利组干预均可减轻心肌纤维化病变程度。鹿红方组改善上述心肌病理改变和减轻心肌纤维化作用与培哚普利组相近。免疫印迹检测显示,与模型组比较,鹿红方和培哚普利干预均可增加心肌STAT3分泌(P<0.05),鹿红方组促进心肌分泌STAT3的作用与培哚普利组相近,差异无统计学意义(P>0.05)。ELISA结果显示,与模型组比较,鹿红方组与培哚普利组CTGF、TSP-1、TIMP-1水平显著降低(P<0.05),鹿红方组抑制CTGF、TSP-1和TIMP-1分泌作用与培哚普利组相近,差异无统计学意义(P>0.05)。[结论]鹿红方可显著抑制心肌梗死后心肌纤维化,其机制与上调STAT3水平,抑制促纤维化因子CTGF、TSP-1和TIMP-1分泌有关。展开更多
基金supported by the National Natural Science Foundation of China(NSFC)(81973316,82173807)the China Postdoctoral Science Foundation(2020M681914)+1 种基金the Fund from Tianjin Municipal Health Commission(ZC200093)the Open Fund of Tianjin Central Hospital of Obstetrics and Gynecology/Tianjin Key Laboratory of human development and reproductive regulation(2021XHY01)。
文摘Psoriasis is a chronic autoimmune disease featured by patches on the skin.It is caused by malfunction of immune cells and keratinocytes with inflammation as one of its key features.Apigenin(API)is a natural flavonoid with anti-inflammatory and immunoregulatory properties.Therefore,we speculated that API can ameliorate psoriasis,and determined its effect on the development of psoriasis by using imiquimod(IMQ)-induced psoriasis mouse model.Our results showed that API attenuated IMQ-induced phenotypic changes,such as erythema,scaling and epidermal thickening,and improved splenic hyperplasia.Abnormal differentiation of immune cells was restored in API-treated mice.Mechanistically,we revealed that API is a key regulator of signal transducer activator of transcription 3(STAT3).API regulated immune responses by reducing interleukin-23(IL-23)/STAT3/IL-17A axis.Moreover,it suppressed IMQ-caused cell hyperproliferation by inactivating STAT3 through regulation of extracellular signal-regulated kinase 1/2 and nuclear factor-κB(NF-κB)pathway.Furthermore,API reduced expression of inflammatory cytokines through inactivation of NF-κB.Taken together,our study demonstrates that API can ameliorate psoriasis and may be considered as a strategy for psoriasis treatment.
基金The Sixth Batch of Special Support Plans in Anhui Province(No.dlPtzjh20200050)Key Natural Science Research Project of Higher Education Institutions in Anhui Province(No.KJ2020A0426)。
文摘Objective: To investigate the effects of Yanghe Pingchuan Granules on airway remodeling in asthmatic rats, and to explore the mechanism of Interleukin-6/Janus kinase 2/ Signal transducing activator of transcription 3(IL-6/JAK2/STAT3) signal axis. Methods: We separated 42 healthy male SD rats into two groups, a control group (7) and a model group (35).The model group was sensitized with a combination of ovalbumin (OVA) and aluminum hydroxide for 2 weeks, while the control group was given an equal amount of physiological saline.After 2 weeks, the modeling group was randomly divided into Model group, Yanghe Pingchuan Granules high, medium and low dose groups and Dexamethasone group, each group consisted of 7 animals. After 4 weeks, OVA atomization and gavage were used for stimulation and treatment. Yanghe Pingchuan Granules high, middle and low groups were given 15.48, 7.74, 3.87 g∙kg-1 Yanghe Pingchuan Granules daily, dexamethasone group was given 0.0625 mg∙kg-1 dexamethasone daily, and the other groups were given the same amount of normal saline. HE, PAS and Masson staining were used to observe the lung histopathological changes in rats. The levels of interleukin-6, IL-23 and IL-17A were detected by ELISA. The expression levels of JAK-2, P-JAK2, STAT3 and P-STAT3 in lung tissues were detected by Western blot. Real-time quantitative polymerase chain reaction (qRT-PCR) was used to detect the mRNA expression levels of IL-6, JAK2 and STAT3 in rat lung tissue. Results: The lung tissue structure of the model group was severely damaged compared to the control group, accompanied by a great many of inflammatory cell infiltration, goblet cell hyperplasia, subepithelial collagen fiber deposition and airway epithelial thickening were more obvious. The expressions of IL-6, IL- 23 and IL-17A in serum were significantly increased (P<0.01), the protein expression levels of JAK-2, P-JAK2, STAT3 and P-STAT3 and the mRNA expression levels of IL-6, JAK2 and STAT3 in lung tissue were significantly increased (P<0.01);Compared with the model group, inflammatory cell infiltration, goblet cell proliferation, subepithelial collagen fiber deposition and airway epithelial thickening were significantly reduced in each administration group, and the expressions of IL-6, IL-23 and IL-17A in serum were significantly decreased (P< 0.01). The protein expression levels of JAK-2, P-JAK2, STAT3 and P-STAT3 and mRNA expression levels of IL-6, JAK2 and STAT3 in lung tissue were significantly decreased (P<0.01). Conclusion: Yanghe Pingchuan Granules can significantly alleviate airway remodeling in asthmatic rats, and its mechanism may be through inhibiting the IL-6/JAK2/STAT3 signal axis.
文摘[目的]研究鹿红方改善心肌梗死后心肌纤维化的作用机制。[方法]采用冠状动脉结扎法制备心肌梗死后心肌纤维化模型。将60只SD大鼠随机分配至假手术组、模型组、鹿红方组以及培哚普利组,干预4周后用心脏彩色多普勒超声检查测量心脏结构和左室射血分数,苏木精-伊红(hematoxylin-eosin,HE)染色、Masson和天狼星红染色观察心脏组织纤维化病理改变,免疫印迹检测心脏信号转导及转录激活因子3(signal transducer and activator of transcription 3,STAT3)分泌情况,酶联免疫吸附分析(enzymelinked immunosorbent assay,ELISA)检测血清促纤维化因子结缔组织生长因子(connective tissue growth factor,CTGF)、血小板反应蛋白-1(thrombospondin-1,TSP-1)、基质金属蛋白酶抑制剂-1(tissue inhibitor of metalloproteinase-1,TIMP-1)的水平。[结果]心脏彩色多普勒超声检查提示,与模型组比较,鹿红方和培哚普利干预均可抑制左室舒张末容积和左室舒张末内径的增大,而且使左室射血分数明显提升(P<0.05)。与培哚普利组比较,鹿红方组改善心室不良扩大与提高左室射血分数作用相近。HE染色结果显示,与模型组比较,鹿红方组和培哚普利组异常形态的心肌细胞数目明显减少,细胞间质肿胀减轻,炎症细胞浸润减少。Masson和天狼星红染色结果显示,与模型组比较,鹿红方组和培哚普利组干预均可减轻心肌纤维化病变程度。鹿红方组改善上述心肌病理改变和减轻心肌纤维化作用与培哚普利组相近。免疫印迹检测显示,与模型组比较,鹿红方和培哚普利干预均可增加心肌STAT3分泌(P<0.05),鹿红方组促进心肌分泌STAT3的作用与培哚普利组相近,差异无统计学意义(P>0.05)。ELISA结果显示,与模型组比较,鹿红方组与培哚普利组CTGF、TSP-1、TIMP-1水平显著降低(P<0.05),鹿红方组抑制CTGF、TSP-1和TIMP-1分泌作用与培哚普利组相近,差异无统计学意义(P>0.05)。[结论]鹿红方可显著抑制心肌梗死后心肌纤维化,其机制与上调STAT3水平,抑制促纤维化因子CTGF、TSP-1和TIMP-1分泌有关。
