The stimulator of interferon genes(STING),an integral adaptor protein in the DNA-sensing pathway,plays a pivotal role in the innate immune response against infections.Additionally,it presents a valuable therapeutic ta...The stimulator of interferon genes(STING),an integral adaptor protein in the DNA-sensing pathway,plays a pivotal role in the innate immune response against infections.Additionally,it presents a valuable therapeutic target for infectious diseases and cancer.We observed that fangchinoline(Fan),a bis-benzylisoquinoline alkaloid(BBA),effectively impedes the replication of vesicular stomatitis virus(VSV),encephalomyocarditis virus(EMCV),influenza A virus(H1N1),and herpes simplex virus-1(HSV-1)in vitro.Fan treatment significantly reduced the viral load,attenuated tissue inflammation,and improved survival in a viral sepsis mouse model.Mechanistically,Fan activates the antiviral response in a STING-dependent manner,leading to increased expression of interferon(IFN)and interferon-stimulated genes(ISGs)for potent antiviral effects in vivo and in vitro.Notably,Fan interacts with STING,preventing its degradation and thereby extending the activation of IFN-based antiviral responses.Collectively,our findings highlight the potential of Fan,which elicits antiviral immunity by suppressing STING degradation,as a promising candidate for antiviral therapy.展开更多
目的:探讨次乌头碱(HA)通过环磷酸鸟苷-腺苷酸合成酶(cGAS)/干扰素基因刺激因子(STING)信号通路对胃癌细胞增殖、迁移、侵袭和免疫逃逸的影响。方法:将BGC-823细胞分为对照组(NC组)、HA低剂量组(HA-L组,2μmol/L)、HA中剂量组(HA-M组,4...目的:探讨次乌头碱(HA)通过环磷酸鸟苷-腺苷酸合成酶(cGAS)/干扰素基因刺激因子(STING)信号通路对胃癌细胞增殖、迁移、侵袭和免疫逃逸的影响。方法:将BGC-823细胞分为对照组(NC组)、HA低剂量组(HA-L组,2μmol/L)、HA中剂量组(HA-M组,4μmol/L)、HA高剂量组(HA-H组,8μmol/L)、RU.521(cGAS抑制剂)组(1μmol/L)、HA-H+RU.521组(8μmol/L+1μmol/L),CCK-8、克隆形成实验检测细胞增殖;划痕愈合实验检测细胞迁移;Transwell实验检测细胞侵袭;ELISA检测细胞上清中趋化因子配体(CXCL)2、CXCL8水平;Western blot检测细胞中增殖细胞核抗原(PCNA)、基质金属蛋白酶(MMP)-9、cGAS、STING蛋白表达。将上述各组细胞分别与NK细胞共培养24 h,命名为NC共培养组、HA-L共培养组、HA-M共培养组、HA-H共培养组、RU.521共培养组、HA-H+RU.521共培养组,检测NK细胞杀伤力。结果:与NC组比较,HA-L组、HA-M组、HA-H组BGC-823细胞OD450(24 h)(0.87±0.08 vs 0.75±0.06、0.62±0.06、0.41±0.03)、克隆形成率[(47.75±2.13)%vs(41.12±1.81)%、(33.58±1.61)%、(19.95±0.84)%]、划痕愈合率[(43.37±2.08)%vs(36.65±1.54)%、(27.74±1.03)%、(13.36±0.62)%]、侵袭细胞数(78.85±3.67 vs 65.59±2.49、51.52±2.01、22.23±1.36)、CXCL2、CXCL8水平、PCNA、MMP-9蛋白表达降低,cGAS、STING蛋白表达升高(P<0.05);与NC组比较,RU.521组对应指标变化趋势与上述相反(P<0.05);与NC共培养组比较,HA-L共培养组、HA-M共培养组、HA-H共培养组NK细胞杀伤力增强,且呈剂量依赖性(P<0.05);与NC共培养组比较,RU.521共培养组对应指标变化趋势与上述相反(P<0.05);RU.521减弱了高剂量HA对BGC-823细胞增殖、迁移、侵袭、免疫逃逸的抑制作用。结论:HA可能通过激活cGAS-STING信号通路抑制胃癌细胞增殖、迁移、侵袭和免疫逃逸。展开更多
基金supported by the Beijing Nova Program,China(Grant No.:20230484342)the Young Elite Scientists Sponsorship Program by China Association of Chinese Medicine(CACM),China(Grant No.:2023-QNRC2-A02)the Joint Fund of Beijing University of Traditional Chinese Medicine and USANA Health Sciences corporation,China(Grant No.:BUCM2023-JS-KF-032).
文摘The stimulator of interferon genes(STING),an integral adaptor protein in the DNA-sensing pathway,plays a pivotal role in the innate immune response against infections.Additionally,it presents a valuable therapeutic target for infectious diseases and cancer.We observed that fangchinoline(Fan),a bis-benzylisoquinoline alkaloid(BBA),effectively impedes the replication of vesicular stomatitis virus(VSV),encephalomyocarditis virus(EMCV),influenza A virus(H1N1),and herpes simplex virus-1(HSV-1)in vitro.Fan treatment significantly reduced the viral load,attenuated tissue inflammation,and improved survival in a viral sepsis mouse model.Mechanistically,Fan activates the antiviral response in a STING-dependent manner,leading to increased expression of interferon(IFN)and interferon-stimulated genes(ISGs)for potent antiviral effects in vivo and in vitro.Notably,Fan interacts with STING,preventing its degradation and thereby extending the activation of IFN-based antiviral responses.Collectively,our findings highlight the potential of Fan,which elicits antiviral immunity by suppressing STING degradation,as a promising candidate for antiviral therapy.
文摘目的:探讨次乌头碱(HA)通过环磷酸鸟苷-腺苷酸合成酶(cGAS)/干扰素基因刺激因子(STING)信号通路对胃癌细胞增殖、迁移、侵袭和免疫逃逸的影响。方法:将BGC-823细胞分为对照组(NC组)、HA低剂量组(HA-L组,2μmol/L)、HA中剂量组(HA-M组,4μmol/L)、HA高剂量组(HA-H组,8μmol/L)、RU.521(cGAS抑制剂)组(1μmol/L)、HA-H+RU.521组(8μmol/L+1μmol/L),CCK-8、克隆形成实验检测细胞增殖;划痕愈合实验检测细胞迁移;Transwell实验检测细胞侵袭;ELISA检测细胞上清中趋化因子配体(CXCL)2、CXCL8水平;Western blot检测细胞中增殖细胞核抗原(PCNA)、基质金属蛋白酶(MMP)-9、cGAS、STING蛋白表达。将上述各组细胞分别与NK细胞共培养24 h,命名为NC共培养组、HA-L共培养组、HA-M共培养组、HA-H共培养组、RU.521共培养组、HA-H+RU.521共培养组,检测NK细胞杀伤力。结果:与NC组比较,HA-L组、HA-M组、HA-H组BGC-823细胞OD450(24 h)(0.87±0.08 vs 0.75±0.06、0.62±0.06、0.41±0.03)、克隆形成率[(47.75±2.13)%vs(41.12±1.81)%、(33.58±1.61)%、(19.95±0.84)%]、划痕愈合率[(43.37±2.08)%vs(36.65±1.54)%、(27.74±1.03)%、(13.36±0.62)%]、侵袭细胞数(78.85±3.67 vs 65.59±2.49、51.52±2.01、22.23±1.36)、CXCL2、CXCL8水平、PCNA、MMP-9蛋白表达降低,cGAS、STING蛋白表达升高(P<0.05);与NC组比较,RU.521组对应指标变化趋势与上述相反(P<0.05);与NC共培养组比较,HA-L共培养组、HA-M共培养组、HA-H共培养组NK细胞杀伤力增强,且呈剂量依赖性(P<0.05);与NC共培养组比较,RU.521共培养组对应指标变化趋势与上述相反(P<0.05);RU.521减弱了高剂量HA对BGC-823细胞增殖、迁移、侵袭、免疫逃逸的抑制作用。结论:HA可能通过激活cGAS-STING信号通路抑制胃癌细胞增殖、迁移、侵袭和免疫逃逸。