Objective:Breast cancer is the most common malignancy in women and is characterized by a high recurrence rate that severely impacts patient survival.Regulatory T cells(Tregs)in the tumor microenvironment(TME)promote i...Objective:Breast cancer is the most common malignancy in women and is characterized by a high recurrence rate that severely impacts patient survival.Regulatory T cells(Tregs)in the tumor microenvironment(TME)promote immune evasion and metastasis,increasing recurrence risk.This study determined how the epigenetic regulators,DNMT3A and METTL7A,modulate Treg infiltration via the DDR1/STAT3/CXCL5 axis and influence breast cancer recurrence and prognosis.Methods:RNA sequencing(RNA-seq)was used to identify differentially expressed genes(DEGs),followed by Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment.Machine learning algorithms,including least absolute shrinkage and selection operator(LASSO),supported vector machine-recursive feature elimination(SVM-RFE)and ElasticNet identified DDR1 as a key gene.Validation included RT-qPCR,western blot,MSP,MeRIP-qPCR,and Co-IP to assess epigenetic regulation.Functional assays(CCK-8,Transwell,and Treg differentiation/chemotaxis)and xenograft models evaluated the role of DDR1 in tumor progression and recurrence.Results:DNMT3A upregulated DDR1 via DNA methylation,while METTL7A enhanced DDR1 mRNA stability via m6A modification.Co-regulation activated the DDR1/STAT3/CXCL5 axis,which boosted cancer cell proliferation,migration,and invasion.CXCL5 secretion increased Treg infiltration and accelerated tumor growth in vivo.DDR1 silencing reversed these effects,confirming that DDR1 has a pivotal role in breast cancer recurrence.Conclusion:DNMT3A and METTL7A were shown to cooperatively regulate DDR1 via DNA/m6A methylation,which drives Tregmediated immune suppression and recurrence.This study provided novel insights and therapeutic targets for breast cancer prognosis and treatment.展开更多
Sjögren’s syndrome(SS)is an autoimmune disease characterized primarily by oral and periocular dryness.Astragalus-Salvia(AS)and Ophiopogon-Dendrobium(OD)represent two frequently utilized herb pairs in SS treatmen...Sjögren’s syndrome(SS)is an autoimmune disease characterized primarily by oral and periocular dryness.Astragalus-Salvia(AS)and Ophiopogon-Dendrobium(OD)represent two frequently utilized herb pairs in SS treatment.While the combination of AS-OD herb pairs demonstrates clinical efficacy in alleviating SS symptoms,its underlying mechanism remains unclear.This investigation sought to assess the therapeutic effects and elucidate the potential mechanisms of AS-OD in non-obese diabetic(NOD)/Ltj mice with SS.The study utilized NOD/Ltj mice as SS models,administering AS-OD treatment for 10 weeks at doses of 113.1,226.2,and 339.3 mg·d−1·20 g−1.Results demonstrated that AS-OD improved SS symptoms,evidenced by enhanced salivary flow rate,decreased anti-SSA/Ro and anti-SSB/La antibody levels,increased swimming duration,and reduced lactate(LA)and blood urea nitrogen(BUN)levels in NOD/Ltj mice.AS-OD reduced lymphocyte infiltration,enhanced Aquaporin-5(AQP5)expression in the submandibular gland,decreased inflammatory cytokine levels in the submandibular gland,and reduced the T helper type 17egulatory T lymphocyte(Th17/Treg)cell ratio in the spleen.Transcriptomic and proteomic analyses indicated AS-OD’s involvement in regulating phosphatidylinositol-3-kinase/protein kinase B(PI3K/AKT)and Janus kinase 3/signal transducer and activator of transcription 3(JAK1/STAT3)pathways,with inhibitory effects validated in both NOD/Ltj mice submandibular gland and A-253 cells.Furthermore,AS-OD enhanced cell viability and reduced A-253 cell apoptosis through the PI3K/AKT pathway.In A-253 cells,AS-OD reduced inflammatory cytokine levels,CXC chemokine ligand 9/10(CXCL9/10),and T-cell chemotaxis by inhibiting the JAK1/STAT3 pathway.AS-OD mitigates SS by suppressing inflammation and immune responses through the PI3K/AKT and JAK1/STAT3 pathways.展开更多
目的探讨长链非编码RNA生长停滞特异性转录本5(growth arrest specific transcript 5 long non-coding RNA growth arrest specific transcript 5,lncRNA GAS5)与JAK1/STAT3信号通路在大鼠心肌H9C2细胞缺氧损伤中的调控作用,为心血管疾...目的探讨长链非编码RNA生长停滞特异性转录本5(growth arrest specific transcript 5 long non-coding RNA growth arrest specific transcript 5,lncRNA GAS5)与JAK1/STAT3信号通路在大鼠心肌H9C2细胞缺氧损伤中的调控作用,为心血管疾病的治疗提供实验基础。方法通过缺氧培养建立体外缺氧模型,以正常培养的H9C2细胞为对照,用RT-qPCR方法检测GAS5的表达水平,流式细胞术检测细胞凋亡率,ELISA法检测炎症细胞因子,CCK-8法用于测定细胞活力。通过细胞活力、凋亡和炎症反应的变化来评估下调GAS5对缺氧心肌细胞的影响。采用RT-qPCR检测JAK1/STAT3信号通路中mRNA的表达,用酪氨酸激酶抑制剂(AG490)抑制JAK1/STAT3信号通路,探讨JAK1/STAT3信号通路对GAS5的表达水平缺氧细胞活力、凋亡和炎症的影响。结果(1)缺氧能够减低H9C2细胞活力,增加细胞凋亡和炎症的发生;(2)GAS5在缺氧诱导的细胞中表达较高,在缺氧H9C2细胞中下调GAS5可抑制细胞凋亡和炎症细胞因子,促进细胞活力;(3)JAK1/STAT3信号通路在缺氧细胞中被激活,并受到GAS5的调控。当JAK1/STAT3信号通路受到抑制时细胞活力会明显增加,细胞凋亡和炎症的发生会明显降低。结论GAS5可通过JAK1/STAT3信号通路调控H9C2细胞的缺氧损伤,GAS5的抑制剂可能与酪氨酸激酶抑制剂协同作用,保护心肌细胞免受缺氧损伤。展开更多
Naive CD4 T cells can differentiate into at least two different types ofT helpers, Thl and Th2 cells. Th2 cells, capable of producing IL-4, IL-5 and IL-13, are involved in humoral immunity against extracellular pathog...Naive CD4 T cells can differentiate into at least two different types ofT helpers, Thl and Th2 cells. Th2 cells, capable of producing IL-4, IL-5 and IL-13, are involved in humoral immunity against extracellular pathogens and in the induction of asthma and other allergic diseases. In this review, we summarize recent reports regarding the transcription factors involved in Th2 differentiation and cell expansion, including StatS, Gfi- 1 and GATA-3. Stats activation is necessary and sufficient for IL-2-mediated function in Th2 differentiation. Enhanced Stats signaling induces Th2 differentiation independent of IL-4 signaling; although it does not up-regulate GATA-3 expression, it does require the presence of GATA-3 for its action. Gfi-1, induced by IL-4, promotes the expansion of GATA-3-expressing cells. Analysis of conditional Gata3 knockout mice confirmed the critical role of GATA-3 in Th2 cell differentiation (both IL-4 dependent and IL-4 independent) and in Th2 cell proliferation and also showed the importance of basal GATA-3 expression in inhibiting Thl differentiation.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.82060479)Key Research and Development Program of Ningxia Hui Autonomous Region(Grant No.2021BEG03062)Ningxia Natural Science Fund Key Project(Grant No.2024AAC02080).
摘要Objective:Breast cancer is the most common malignancy in women and is characterized by a high recurrence rate that severely impacts patient survival.Regulatory T cells(Tregs)in the tumor microenvironment(TME)promote immune evasion and metastasis,increasing recurrence risk.This study determined how the epigenetic regulators,DNMT3A and METTL7A,modulate Treg infiltration via the DDR1/STAT3/CXCL5 axis and influence breast cancer recurrence and prognosis.Methods:RNA sequencing(RNA-seq)was used to identify differentially expressed genes(DEGs),followed by Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment.Machine learning algorithms,including least absolute shrinkage and selection operator(LASSO),supported vector machine-recursive feature elimination(SVM-RFE)and ElasticNet identified DDR1 as a key gene.Validation included RT-qPCR,western blot,MSP,MeRIP-qPCR,and Co-IP to assess epigenetic regulation.Functional assays(CCK-8,Transwell,and Treg differentiation/chemotaxis)and xenograft models evaluated the role of DDR1 in tumor progression and recurrence.Results:DNMT3A upregulated DDR1 via DNA methylation,while METTL7A enhanced DDR1 mRNA stability via m6A modification.Co-regulation activated the DDR1/STAT3/CXCL5 axis,which boosted cancer cell proliferation,migration,and invasion.CXCL5 secretion increased Treg infiltration and accelerated tumor growth in vivo.DDR1 silencing reversed these effects,confirming that DDR1 has a pivotal role in breast cancer recurrence.Conclusion:DNMT3A and METTL7A were shown to cooperatively regulate DDR1 via DNA/m6A methylation,which drives Tregmediated immune suppression and recurrence.This study provided novel insights and therapeutic targets for breast cancer prognosis and treatment.
基金the National Natural Science Foundation of China(No.82074341).
摘要Sjögren’s syndrome(SS)is an autoimmune disease characterized primarily by oral and periocular dryness.Astragalus-Salvia(AS)and Ophiopogon-Dendrobium(OD)represent two frequently utilized herb pairs in SS treatment.While the combination of AS-OD herb pairs demonstrates clinical efficacy in alleviating SS symptoms,its underlying mechanism remains unclear.This investigation sought to assess the therapeutic effects and elucidate the potential mechanisms of AS-OD in non-obese diabetic(NOD)/Ltj mice with SS.The study utilized NOD/Ltj mice as SS models,administering AS-OD treatment for 10 weeks at doses of 113.1,226.2,and 339.3 mg·d−1·20 g−1.Results demonstrated that AS-OD improved SS symptoms,evidenced by enhanced salivary flow rate,decreased anti-SSA/Ro and anti-SSB/La antibody levels,increased swimming duration,and reduced lactate(LA)and blood urea nitrogen(BUN)levels in NOD/Ltj mice.AS-OD reduced lymphocyte infiltration,enhanced Aquaporin-5(AQP5)expression in the submandibular gland,decreased inflammatory cytokine levels in the submandibular gland,and reduced the T helper type 17egulatory T lymphocyte(Th17/Treg)cell ratio in the spleen.Transcriptomic and proteomic analyses indicated AS-OD’s involvement in regulating phosphatidylinositol-3-kinase/protein kinase B(PI3K/AKT)and Janus kinase 3/signal transducer and activator of transcription 3(JAK1/STAT3)pathways,with inhibitory effects validated in both NOD/Ltj mice submandibular gland and A-253 cells.Furthermore,AS-OD enhanced cell viability and reduced A-253 cell apoptosis through the PI3K/AKT pathway.In A-253 cells,AS-OD reduced inflammatory cytokine levels,CXC chemokine ligand 9/10(CXCL9/10),and T-cell chemotaxis by inhibiting the JAK1/STAT3 pathway.AS-OD mitigates SS by suppressing inflammation and immune responses through the PI3K/AKT and JAK1/STAT3 pathways.
摘要目的探讨长链非编码RNA生长停滞特异性转录本5(growth arrest specific transcript 5 long non-coding RNA growth arrest specific transcript 5,lncRNA GAS5)与JAK1/STAT3信号通路在大鼠心肌H9C2细胞缺氧损伤中的调控作用,为心血管疾病的治疗提供实验基础。方法通过缺氧培养建立体外缺氧模型,以正常培养的H9C2细胞为对照,用RT-qPCR方法检测GAS5的表达水平,流式细胞术检测细胞凋亡率,ELISA法检测炎症细胞因子,CCK-8法用于测定细胞活力。通过细胞活力、凋亡和炎症反应的变化来评估下调GAS5对缺氧心肌细胞的影响。采用RT-qPCR检测JAK1/STAT3信号通路中mRNA的表达,用酪氨酸激酶抑制剂(AG490)抑制JAK1/STAT3信号通路,探讨JAK1/STAT3信号通路对GAS5的表达水平缺氧细胞活力、凋亡和炎症的影响。结果(1)缺氧能够减低H9C2细胞活力,增加细胞凋亡和炎症的发生;(2)GAS5在缺氧诱导的细胞中表达较高,在缺氧H9C2细胞中下调GAS5可抑制细胞凋亡和炎症细胞因子,促进细胞活力;(3)JAK1/STAT3信号通路在缺氧细胞中被激活,并受到GAS5的调控。当JAK1/STAT3信号通路受到抑制时细胞活力会明显增加,细胞凋亡和炎症的发生会明显降低。结论GAS5可通过JAK1/STAT3信号通路调控H9C2细胞的缺氧损伤,GAS5的抑制剂可能与酪氨酸激酶抑制剂协同作用,保护心肌细胞免受缺氧损伤。
摘要Naive CD4 T cells can differentiate into at least two different types ofT helpers, Thl and Th2 cells. Th2 cells, capable of producing IL-4, IL-5 and IL-13, are involved in humoral immunity against extracellular pathogens and in the induction of asthma and other allergic diseases. In this review, we summarize recent reports regarding the transcription factors involved in Th2 differentiation and cell expansion, including StatS, Gfi- 1 and GATA-3. Stats activation is necessary and sufficient for IL-2-mediated function in Th2 differentiation. Enhanced Stats signaling induces Th2 differentiation independent of IL-4 signaling; although it does not up-regulate GATA-3 expression, it does require the presence of GATA-3 for its action. Gfi-1, induced by IL-4, promotes the expansion of GATA-3-expressing cells. Analysis of conditional Gata3 knockout mice confirmed the critical role of GATA-3 in Th2 cell differentiation (both IL-4 dependent and IL-4 independent) and in Th2 cell proliferation and also showed the importance of basal GATA-3 expression in inhibiting Thl differentiation.