AIM:To investigate whether interleukin-17A(IL-17A)gets involved in the mechanisms of inflammation-related retinal pigment epithelium(RPE)cells injury and its significance in age-related macular degeneration(AMD).MRTHO...AIM:To investigate whether interleukin-17A(IL-17A)gets involved in the mechanisms of inflammation-related retinal pigment epithelium(RPE)cells injury and its significance in age-related macular degeneration(AMD).MRTHODS:A sodium iodate(NaIO3)mouse model as well as IL-17A-/-mice were established.The effects of inflammatory cytokines in RPE cells and retinal microglia before and after NaIO3 modeling in vivo and in vitro,were investigated using immunofluorescence,immunoprotein blotting,and quantitative real-time fluorescence polymerase chain reaction(qRT-PCR),respectively.Interventions using recombinant IL-17A protein(rIL-17A)or IL-17A neutralizing antibody(IL-17A NAb)were used to observe the subsequent differences in fundus,fundus photography and optical coherence tomography(OCT),cell viability,and expression of oxidative stress-related markers before and after modeling,and to screen for key signaling pathways.RESULTS:In the scenario of NaIO3 stimulation,RPE cells obviously tended to degenerate.Simultaneously proliferation and activation of retinal microglia was confirmed in NaIO3-stimulated mice,whereas such effects induced by NaIO3 were significantly ameliorated with IL-17A NAb intervention or in IL-17A-/-mice.In addition,IL-17A promoted the proliferation and activation of microglia as well as oxidative damage and the secretion of inflammatory cytokines alongside NaIO3-induced damage in RPE cells in vivo and ex vivo.Meanwhile,the extracellular signalregulated kinase(ERK)signaling pathway was shown to be participated in the regulation of NaIO3-induced RPE cells injury mediated by IL-17A in vivo and ex vivo,as IL-17A induced inflammatory cytokines release in the NaIO3 model was alleviated after blocking the ERK pathway.CONCLUSION:IL-17A probably promotes the NaIO3-induced RPE cells injury through exacerbating inflammation in terms of retinal microglia activation and inflammatory cytokines release via ERK signaling pathway.Inhibition of IL-17A may be a new potential target for dry AMD treatment.展开更多
Psoriasiform rash is a notable immune-related cutaneous adverse event(ircAE)accounting for approximately 5%of all ircAEs1,2.Patients with cancer and pre-existing psoriasis face elevated risk of disease recurrence or e...Psoriasiform rash is a notable immune-related cutaneous adverse event(ircAE)accounting for approximately 5%of all ircAEs1,2.Patients with cancer and pre-existing psoriasis face elevated risk of disease recurrence or exacerbation after receiving immune checkpoint inhibitors(ICIs).A European multicenter study has reported a reactivation rate of 28.7%in this population3.ICIs also trigger de novo psoriatic lesions,which mirror conventional lesion subtypes(plaque,guttate,erythrodermic,or pustular).展开更多
基金Supported by the National Natural Science Foundation of China(No.82171076,No.U22A20311,No.82388101)the National Key R&D Program(No.2022YFC2502800)Shanghai Municipal Education Commission(No.2023KJ05-67).
文摘AIM:To investigate whether interleukin-17A(IL-17A)gets involved in the mechanisms of inflammation-related retinal pigment epithelium(RPE)cells injury and its significance in age-related macular degeneration(AMD).MRTHODS:A sodium iodate(NaIO3)mouse model as well as IL-17A-/-mice were established.The effects of inflammatory cytokines in RPE cells and retinal microglia before and after NaIO3 modeling in vivo and in vitro,were investigated using immunofluorescence,immunoprotein blotting,and quantitative real-time fluorescence polymerase chain reaction(qRT-PCR),respectively.Interventions using recombinant IL-17A protein(rIL-17A)or IL-17A neutralizing antibody(IL-17A NAb)were used to observe the subsequent differences in fundus,fundus photography and optical coherence tomography(OCT),cell viability,and expression of oxidative stress-related markers before and after modeling,and to screen for key signaling pathways.RESULTS:In the scenario of NaIO3 stimulation,RPE cells obviously tended to degenerate.Simultaneously proliferation and activation of retinal microglia was confirmed in NaIO3-stimulated mice,whereas such effects induced by NaIO3 were significantly ameliorated with IL-17A NAb intervention or in IL-17A-/-mice.In addition,IL-17A promoted the proliferation and activation of microglia as well as oxidative damage and the secretion of inflammatory cytokines alongside NaIO3-induced damage in RPE cells in vivo and ex vivo.Meanwhile,the extracellular signalregulated kinase(ERK)signaling pathway was shown to be participated in the regulation of NaIO3-induced RPE cells injury mediated by IL-17A in vivo and ex vivo,as IL-17A induced inflammatory cytokines release in the NaIO3 model was alleviated after blocking the ERK pathway.CONCLUSION:IL-17A probably promotes the NaIO3-induced RPE cells injury through exacerbating inflammation in terms of retinal microglia activation and inflammatory cytokines release via ERK signaling pathway.Inhibition of IL-17A may be a new potential target for dry AMD treatment.
基金supported by grants from the National Natural Science Foundation of China(Nos.82373372 and U22A20330)Key Project of Research and Development Plan in Heilongjiang Province(Nos.2022ZX06C01 and JD2023SJ40)+1 种基金National Cancer Center Climbing Fund(No.NCC201908A03)Beijing Xisike Clinical Oncology Research Foundation(No.Y-HR2020MS-0900).
文摘Psoriasiform rash is a notable immune-related cutaneous adverse event(ircAE)accounting for approximately 5%of all ircAEs1,2.Patients with cancer and pre-existing psoriasis face elevated risk of disease recurrence or exacerbation after receiving immune checkpoint inhibitors(ICIs).A European multicenter study has reported a reactivation rate of 28.7%in this population3.ICIs also trigger de novo psoriatic lesions,which mirror conventional lesion subtypes(plaque,guttate,erythrodermic,or pustular).
文摘目的探讨五虎汤对呼吸道合胞病毒(respiratory syncytial virus,RSV)诱导的哮喘小鼠模型树突细胞自噬和炎性因子白细胞介素-17A(interleukin-17A,IL-17A)、白细胞介素-17F(interleukin-17F,IL-17F)的影响。方法采用RSV联合鸡卵清蛋白(ovalbumin,OVA)建立哮喘小鼠模型,将小鼠随机分为对照组、模型组及五虎汤低、中、高剂量(1.6、3.2、6.4g/kg)组和地塞米松(1.82mg/kg)组、雷帕霉素(1mg/kg)组,连续给药14d后采用苏木-伊红(HE)染色法观察各组小鼠肺组织病理变化,电镜观察肺组织自噬小体变化,Westernblotting法检测肺组织树突细胞中微管相关蛋白轻链3I(microtubule-associated protein lightc hain 3I,LC3I)和LC3II表达,ELISA法检测肺泡灌洗液中IL-17A、IL-17F的水平。SD大鼠随机分为对照组及五虎汤低、中、高(1.1、2.2、4.4 g/kg)组,各给药组ig相应药物,2次/d,连续给药7 d后腹主动脉取血,离心取血清,灭活后滤过。将分离的树突细胞与CD4^(+)T细胞共培养,采用RSV联合OVA-17肽建立RSV诱导的树突细胞自噬模型,流式细胞术检测五虎汤含药血清对CD4^(+)T细胞增殖与T细胞活化标志物CD69表达的影响。结果模型组小鼠气道狭窄,血管周围有大量炎症细胞浸润,肺组织自噬小体增加,自噬蛋白LC3II/LC3I表达水平显著升高(P<0.01),IL-17A和IL-17F水平显著升高(P<0.01);与模型组比较,五虎汤组肺组织炎症表现减轻,肺组织自噬小体增加,LC3II/LC3I蛋白表达水平显著升高(P<0.01),IL-17A和IL-17F水平显著降低(P<0.05、0.01)。RSV联合OVA-17肽诱导的树突细胞自噬模型中,与对照组比较,模型组CD4^(+)T细胞增殖与CD69表达均显著升高(P<0.01);与模型组比较,五虎汤中、高剂量含药血清组CD4^(+)T细胞增殖与CD69表达显著降低(P<0.05、0.01)。结论RSV可诱导小鼠肺组织树突细胞自噬水平升高,上调IL-17A和IL-17F水平,从而介导炎症反应;五虎汤可通过上调RSV诱导的哮喘小鼠肺组织树突细胞自噬水平,下调IL-17A和IL-17F水平,从而改善哮喘气道炎症。
