本研究探讨不同浓度的IL-6在弥漫大B淋巴瘤(diffuse large B-cell lymphoma,DLBCL)中的作用,以及是否通过JAK/STAT3信号通路介导细胞的凋亡增殖与侵袭迁移能力。使用人DLBCL细胞系OCI-LY8作为模型,通过药物干预IL-6或转染质粒敲除STAT3...本研究探讨不同浓度的IL-6在弥漫大B淋巴瘤(diffuse large B-cell lymphoma,DLBCL)中的作用,以及是否通过JAK/STAT3信号通路介导细胞的凋亡增殖与侵袭迁移能力。使用人DLBCL细胞系OCI-LY8作为模型,通过药物干预IL-6或转染质粒敲除STAT3基因。通过CCK8法检测细胞活力,并使用流式细胞术测定各组细胞的凋亡率,研究IL-6对DLBCL细胞增殖凋亡能力的影响。使用Transwell小室和划痕实验,检测细胞侵袭和迁移能力,研究不同浓度IL-6对DLBCL转移能力的作用。使用Western blotting检测JAK,STAT3以及其下游凋亡相关的B细胞淋巴瘤2(B cell lymphoma 2,Bcl-2)、Bcl-2相关X蛋白(Bcl-2-associated X protein,Bax)和生存素(survivin)蛋白的表达情况。Western blotting结果显示IL-6可以有效激活JAK/STAT3通路,并上调抗凋亡蛋白Bcl-2和生存素,下调促凋亡蛋白Bax,从而抑制OCI-LY8凋亡。此外,IL-6通过激活STAT3也能提高OCI-LY8的侵袭与迁移能力。而IL-6的作用在IL-6抑制剂LMT-28处理或STAT3敲除后被逆转。IL-6能通过激活JAK/STAT3信号通路,增强DLBCL细胞株OCI-LY8的侵袭和迁移能力,并增强其抗凋亡能力。这些发现揭示IL-6在DLBCL发生中的作用,为DLBCL的治疗提供了新的靶点和理论依据。展开更多
目的:以白细胞介素6(interleukin-6, IL-6)/信号转导和转录激活因子3(signal transducer and activator of transcription 3, STAT3)信号环路为基础,研究甲型流感病毒(influenza A virus, IAV)所致巨噬细胞炎性损伤的机制,同时探讨麻杏...目的:以白细胞介素6(interleukin-6, IL-6)/信号转导和转录激活因子3(signal transducer and activator of transcription 3, STAT3)信号环路为基础,研究甲型流感病毒(influenza A virus, IAV)所致巨噬细胞炎性损伤的机制,同时探讨麻杏石甘汤含药血清的干预效果。方法:RAW264.7和BV2细胞分为正常对照组、Janus激酶(Janus kinase, JAK)/STAT信号通路激活剂组和抑制剂组、模型对照组、奥司他韦组、抗病毒颗粒组及麻杏石甘汤组。在进行IAV造模及相应血清干预后继续培养24和48 h,对2种细胞下列指标进行检测分析:细胞培养上清液中IL-6含量的检测采用ELISA法;细胞内IL-6和STAT3的mRNA表达采用RT-qPCR法进行检测;以Western blot法对细胞内STAT3的蛋白表达进行检测;细胞中磷酸化STAT3(p-STAT3)表达用免疫荧光法检测;Pearson相关分析分别对2种细胞p-STAT3蛋白的表达与IL-6含量的相关性进行评价。构建2种细胞共培养模型,检测细胞培养上清液中IL-6的含量。对STAT3与麻杏石甘汤主要成分进行分子对接。结果:2种细胞培养上清液中IL-6含量、细胞内IL-6和STAT3 mRNA表达、胞内STAT3和p-STAT3蛋白表达均在流感病毒刺激后升高(P<0.05,P<0.01),细胞p-STAT3表达与IL-6分泌水平呈现正相关。在共培养模型中,IL-6分泌水平升高(P<0.01)。麻杏石甘汤能降低IL-6的分泌水平,降低IL-6和STAT3 mRNA的表达水平,使STAT3和p-STAT3在细胞中的表达水平下降(P<0.05,P<0.01),抑制IL-6在共培养模型中的分泌水平。STAT3与甘草苷、苦杏仁苷和麻黄碱均具有较好的结合活性。结论:IAV可引起巨噬细胞炎性损伤,其机制可能与激活IL-6/STAT3信号环路有关,麻杏石甘汤可通过调控该信号环路,缓解IAV的致病作用。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
Background:Gallic acid(GA),a plant-derived polyphenol,possesses diverse biological functions such as reducing inflammation and against tumors.Currently,the influence of GA on the resistance of esophageal squamous cell...Background:Gallic acid(GA),a plant-derived polyphenol,possesses diverse biological functions such as reducing inflammation and against tumors.Currently,the influence of GA on the resistance of esophageal squamous cell carcinoma(ESCC)cells to cisplatin(DDP)is not well understood.Methods:Cell counting kit-8 assay examined how GA affected KYSE30 and TE-1 cell viability.5-Ethynyl-2′-deoxyuridine and TdT-mediated dUTP Nick-End labeling staining detected cell proliferation and apoptosis.Clone formation assay,flow cytometry,Carboxyfluorescein diacetate succinimidyl ester fluorescent probes,and Transwell assay determined cell biological properties,and 2′,7′-Dichlorofluorescin diacetate(DCFH-DA)fluorescent probes detected oxidative stress levels.Signal transducer and activator of transcription 3(STAT3)/Notch pathway protein levels after GA and/or Interleukin-6(IL-6)intervention were examined through Western blot.Furthermore,a model for subcutaneous graft tumors was established in nude mice.Results:GA exerted suppressive effects on cell proliferation,and caused apoptosis of KYSE30 and TE-1 cells.IL-6 intervention activated the STAT3/Notch pathway and promoted the malignant biological properties of ESCC cells.In contrast,GA attenuated the effects of IL-6,while STAT3 or Notch inhibitor further enhanced the effects of GA,suggesting that GA inhibited the IL-6/STAT3/Notch pathway.Not only that,GA promoted oxidative stress and enhanced cell sensitivity to DDP both in vitro and in vivo.Conclusion:GA suppresses the malignant progression of ESCC and enhances cell sensitivity to DDP by hindering the IL-6/STAT3/Notch pathway.展开更多
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.
基金Mechanistic Investigation into the Extraction,Purification,and Anti-Esophageal Cancer Effects of Gallic Acid Derived from Rhodiola crenulata(YLUKLM2023001).
文摘Background:Gallic acid(GA),a plant-derived polyphenol,possesses diverse biological functions such as reducing inflammation and against tumors.Currently,the influence of GA on the resistance of esophageal squamous cell carcinoma(ESCC)cells to cisplatin(DDP)is not well understood.Methods:Cell counting kit-8 assay examined how GA affected KYSE30 and TE-1 cell viability.5-Ethynyl-2′-deoxyuridine and TdT-mediated dUTP Nick-End labeling staining detected cell proliferation and apoptosis.Clone formation assay,flow cytometry,Carboxyfluorescein diacetate succinimidyl ester fluorescent probes,and Transwell assay determined cell biological properties,and 2′,7′-Dichlorofluorescin diacetate(DCFH-DA)fluorescent probes detected oxidative stress levels.Signal transducer and activator of transcription 3(STAT3)/Notch pathway protein levels after GA and/or Interleukin-6(IL-6)intervention were examined through Western blot.Furthermore,a model for subcutaneous graft tumors was established in nude mice.Results:GA exerted suppressive effects on cell proliferation,and caused apoptosis of KYSE30 and TE-1 cells.IL-6 intervention activated the STAT3/Notch pathway and promoted the malignant biological properties of ESCC cells.In contrast,GA attenuated the effects of IL-6,while STAT3 or Notch inhibitor further enhanced the effects of GA,suggesting that GA inhibited the IL-6/STAT3/Notch pathway.Not only that,GA promoted oxidative stress and enhanced cell sensitivity to DDP both in vitro and in vivo.Conclusion:GA suppresses the malignant progression of ESCC and enhances cell sensitivity to DDP by hindering the IL-6/STAT3/Notch pathway.
