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
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
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.
