目的通过检测NOD样受体蛋白3(NLRP3)/半胱氨酸天冬氨酸蛋白水解酶-1(Caspase-1)/消皮素D(GSDMD)通路,探讨阿霉素纳米凝胶载药(Nanogel drug loading,NG)对H22肝癌荷瘤小鼠的作用机制。方法将H22肝癌细胞珠每只1.25×10^(6)个/100μ...目的通过检测NOD样受体蛋白3(NLRP3)/半胱氨酸天冬氨酸蛋白水解酶-1(Caspase-1)/消皮素D(GSDMD)通路,探讨阿霉素纳米凝胶载药(Nanogel drug loading,NG)对H22肝癌荷瘤小鼠的作用机制。方法将H22肝癌细胞珠每只1.25×10^(6)个/100μl接种于Balb/c小鼠右前肢腋窝皮下,待肿瘤体积至50~60mm^(3)时,将40只Balb/c小鼠随机分为5组(n=8),分别为肿瘤对照组、阿霉素3mg组(DOX-3.0)、阿霉素6mg组(DOX-6.0)、阿霉素纳米凝胶载药3mg组(NG/DOX-3.0)和阿霉素纳米凝胶载药6mg组(NG/DOX-6.0)。各组均采用尾静脉注射给药治疗,分别给予生理盐水(5ml/kg)、DOX(3mg/kg)、DOX(6mg/kg)、NG/DOX(3mg/kg)和NG/DOX(6mg/kg),1次/3d,给药4次,于给药结束第3d处死动物取材。通过苏木精-伊红(hematoxylin-eosin,HE)染色,观察肿瘤生长情况和坏死面积;采用免疫组织化学染色检测NLRP3/Caspase-1/GSDMD凋亡基因的表达情况。结果HE染色与肿瘤对照组比较,各治疗组肿瘤生长状态较差,且DOX-3.0、NG/DOX-3.0、DOX-6.0、NG/DOX-6.0肿瘤坏死面积百分率依次增大,组间差异均有统计学意义(P<0.05);与肿瘤对照组比较,DOX-3.0、NG/DOX-3.0、DOX-6.0、NG/DOX-6.0组肿瘤组织中NLRP3、Caspase-1、GSDMD的蛋白阳性表达水平依次减弱,组间差异均有统计学意义(P<0.05),纳米凝胶载药组作用优于单纯阿霉素给药组。结论纳米凝胶载药组治疗H22肝癌的作用优于阿霉素单独用药,它能通过下调NLRP3/Caspase-1/GSDMD通路,有效抑制肿瘤生长、降低药物使用剂量及提高抗癌效果,具有良好发展前景,其作用机制有待于进一步探讨。展开更多
Objective Stroke is a leading cause of death and disability worldwide,with ischemic stroke accounting for 80%-85%of cases.Despite the prevalence,effective treatments remain scarce.The compelling evidence suggest that ...Objective Stroke is a leading cause of death and disability worldwide,with ischemic stroke accounting for 80%-85%of cases.Despite the prevalence,effective treatments remain scarce.The compelling evidence suggest that high concentrations of ATP in the brain post-stroke can trigger irreversible neuronal damage and necrosis,contributing to a range of neurocellular dysfunctions.Pyroptosis,a recently identified form of programmed cell death,is characterized by caspase-1 activation and the action of the Gasdermin D(GSDMD)protein family,leading to cell perforation and inflammatory death.Methods In this study,human neuroblastoma SH-SY5Y cells were used to investigate the mechanisms of ATP-induced neurotoxicity and the protective effects of hydrogen sulfide(H_(2)S)against this toxicity through the antagonization of pyroptosis.We employed CCK-8 and LDH assays to assess cell viability.YO-PRO-1 fluorescent dyes and flow cytometry were conducted for detecting changes in cell membrane permeability.Western blot analysis was used to measure protein levels associated with cellular dysfunction.Results Our results indicate that high concentrations of ATP enhance cytotoxicity and increase cell membrane permeability in SH-SY5Y cells,that are mitigated by the H_(2)S donor NaHS.Furthermore,ATP was found to promote the activation of the NOD-like receptor pyrin domain-containing 1(NLRP-1),caspase-1,and the cleavage of GSDMD,with NaHS significantly attenuating these effects.Conclusion Our research suggests that H2S protects SH-SY5Y cells from ATP-induced neurotoxicity through a mechanism mediated by the NLRP1,caspase-1,and GSDMD pathway.展开更多
目的探讨自身免疫性甲状腺炎伴发抑郁症动物模型的制备与评价,并基于NOD样受体蛋白-3(NOD-like receptor protein 3,NLRP3)/含半胱氨酸的天冬氨酸蛋白水解酶-1(cysteinyl aspartate specific proteinase-1,Caspase-1)/消皮素D(gasdermin...目的探讨自身免疫性甲状腺炎伴发抑郁症动物模型的制备与评价,并基于NOD样受体蛋白-3(NOD-like receptor protein 3,NLRP3)/含半胱氨酸的天冬氨酸蛋白水解酶-1(cysteinyl aspartate specific proteinase-1,Caspase-1)/消皮素D(gasdermin D,GSDMD)通路加以验证。方法32只NOD.H-2H4小鼠随机分为正常组(N组)、抑郁组(DP组)、自身免疫性甲状腺炎伴抑郁症组(AIT+DP组)、自身免疫性甲状腺炎组(AIT组),每组8只。N组正常饲养,DP组采取5周慢性不可预知温和刺激(chronic unpredictable mild stress,CUMS),AIT组予0.05%碘化钠水溶液建立自身免疫性甲状腺炎模型,AIT+DP组在建立AIT动物模型基础上施加5周CUMS建立AIT+DP动物模型。通过观测小鼠甲状腺组织结构及淋巴细胞浸润情况和血清甲状腺过氧化物酶抗体(thyroid peroxidase antibody,TPOAb)和甲状腺球蛋白抗体(anti-thyroid autoantibodies,TGAb)水平评价小鼠自身免疫性甲状腺炎模型是否制备成功;通过测定体重、糖水偏好率、旷场行为学(中央象限时间、中央象限比例、站立次数、排便次数、毛发梳理时间),大脑皮质、海马病理变化及大脑皮质小胶质细胞焦亡相关蛋白水平评价小鼠抑郁状态。模型小鼠同时符合上述自身免疫性甲状腺炎与抑郁症相关指标检测,则表明AIT+DP动物模型制备成功。结果与N组比较,AIT组与AIT+DP组血清TGAb、TPOAb水平显著增加(P<0.01),甲状腺可见大量炎细胞浸润,DP组与AIT+DP组小鼠中央象限时间、中央象限比例、站立次数、排便次数、毛发梳理时间有不同程度降低,大脑皮质神经胶质细胞增多,神经元细胞减少,伴有部分细胞核萎缩,NLRP3、IL-1β、Caspase-1、GSDMD-N蛋白表达水平显著上调,AIT+DP组尤为明显(P<0.01)。结论0.05%碘化钠水溶液与CUMS可较好地模拟AIT+DP模型动物外在表现与内在指标变化,可为AIT+DP疾病的研究提供动物模型参考。展开更多
目的通过观察丹参多酚酸盐对核苷酸结合寡聚结构域样受体蛋白3(NOD-like receptor thermal protein domain associated protein 3,NLRP3)/天冬氨酸特异性半胱氨酸蛋白酶1(Cysteinyl aspartate specific proteinase-1,Caspase-1)/焦亡效...目的通过观察丹参多酚酸盐对核苷酸结合寡聚结构域样受体蛋白3(NOD-like receptor thermal protein domain associated protein 3,NLRP3)/天冬氨酸特异性半胱氨酸蛋白酶1(Cysteinyl aspartate specific proteinase-1,Caspase-1)/焦亡效应蛋白消皮素D(Gasdermin-D,GSDMD)细胞焦亡通路的影响,探讨改善膜性肾病大鼠肾损伤可能的作用机制。方法SD大鼠通过尾静脉注射阳离子牛血清白蛋白建立膜性肾病大鼠模型,造模成功后分为模型组、盐酸贝那普利组(10 mg/kg)、丹参多酚酸盐低、中、高剂量组(16.7、33.3、66.7 mg/kg),另设有正常组,每组均为10只。各给药组连续给药4周后,检测24小时尿蛋白定量(24-hour urinary protein quantity,24 h UTP)和血肌酐(serum creatinine,Scr)、血尿素氮(blood urea nitrogen,BUN)、血清总蛋白(total protein,TP)、血清白蛋白(serum albumin,ALB)、甘油三酯(triglyceride,TG)、总胆固醇(total cholesterol,TC)的含量;酶联免疫吸附法检测大鼠血清白细胞介素-1β(interleukin-1β,IL-1β)、IL-18;采用光镜、电镜、荧光显微镜下观察肾脏病理学变化;Western blot、实时荧光定量PCR法检测NLRP3、Caspase-1、GSDMD蛋白及mRNA表达。结果与模型组比较,各给药组24 h UTP水平明显降低(P<0.05,P<0.01),丹参多酚酸盐中、高剂量组和盐酸贝那普利组大鼠血清TP和ALB水平显著升高(P<0.01),TC和TG水平明显降低(P<0.05,P<0.01);普通光镜、荧光显微镜及电镜下观察可见模型组大鼠肾组织病理损伤明显,经各组药物治疗后病理损伤逐渐改善。与模型组比较,各给药组大鼠血清IL-1β、IL-18水平明显降低(P<0.05,P<0.01);与正常组比较,模型组大鼠肾脏NLRP3、Caspase-1、GSDMD蛋白及其mRNA表达显著升高(P<0.01);与模型组比较,各给药组大鼠肾组织NLRP3/Caspase-1/GSDMD蛋白及其mRNA表达水平明显降低(P<0.05,P<0.01),以丹参多酚酸盐高剂量组效果最佳。结论丹参多酚酸盐对膜性肾病大鼠肾保护作用与调控NLRP3/Caspase-1/GSDMD细胞焦亡通路,改善炎症状态,减轻肾损伤有关。展开更多
文摘目的通过检测NOD样受体蛋白3(NLRP3)/半胱氨酸天冬氨酸蛋白水解酶-1(Caspase-1)/消皮素D(GSDMD)通路,探讨阿霉素纳米凝胶载药(Nanogel drug loading,NG)对H22肝癌荷瘤小鼠的作用机制。方法将H22肝癌细胞珠每只1.25×10^(6)个/100μl接种于Balb/c小鼠右前肢腋窝皮下,待肿瘤体积至50~60mm^(3)时,将40只Balb/c小鼠随机分为5组(n=8),分别为肿瘤对照组、阿霉素3mg组(DOX-3.0)、阿霉素6mg组(DOX-6.0)、阿霉素纳米凝胶载药3mg组(NG/DOX-3.0)和阿霉素纳米凝胶载药6mg组(NG/DOX-6.0)。各组均采用尾静脉注射给药治疗,分别给予生理盐水(5ml/kg)、DOX(3mg/kg)、DOX(6mg/kg)、NG/DOX(3mg/kg)和NG/DOX(6mg/kg),1次/3d,给药4次,于给药结束第3d处死动物取材。通过苏木精-伊红(hematoxylin-eosin,HE)染色,观察肿瘤生长情况和坏死面积;采用免疫组织化学染色检测NLRP3/Caspase-1/GSDMD凋亡基因的表达情况。结果HE染色与肿瘤对照组比较,各治疗组肿瘤生长状态较差,且DOX-3.0、NG/DOX-3.0、DOX-6.0、NG/DOX-6.0肿瘤坏死面积百分率依次增大,组间差异均有统计学意义(P<0.05);与肿瘤对照组比较,DOX-3.0、NG/DOX-3.0、DOX-6.0、NG/DOX-6.0组肿瘤组织中NLRP3、Caspase-1、GSDMD的蛋白阳性表达水平依次减弱,组间差异均有统计学意义(P<0.05),纳米凝胶载药组作用优于单纯阿霉素给药组。结论纳米凝胶载药组治疗H22肝癌的作用优于阿霉素单独用药,它能通过下调NLRP3/Caspase-1/GSDMD通路,有效抑制肿瘤生长、降低药物使用剂量及提高抗癌效果,具有良好发展前景,其作用机制有待于进一步探讨。
文摘Objective Stroke is a leading cause of death and disability worldwide,with ischemic stroke accounting for 80%-85%of cases.Despite the prevalence,effective treatments remain scarce.The compelling evidence suggest that high concentrations of ATP in the brain post-stroke can trigger irreversible neuronal damage and necrosis,contributing to a range of neurocellular dysfunctions.Pyroptosis,a recently identified form of programmed cell death,is characterized by caspase-1 activation and the action of the Gasdermin D(GSDMD)protein family,leading to cell perforation and inflammatory death.Methods In this study,human neuroblastoma SH-SY5Y cells were used to investigate the mechanisms of ATP-induced neurotoxicity and the protective effects of hydrogen sulfide(H_(2)S)against this toxicity through the antagonization of pyroptosis.We employed CCK-8 and LDH assays to assess cell viability.YO-PRO-1 fluorescent dyes and flow cytometry were conducted for detecting changes in cell membrane permeability.Western blot analysis was used to measure protein levels associated with cellular dysfunction.Results Our results indicate that high concentrations of ATP enhance cytotoxicity and increase cell membrane permeability in SH-SY5Y cells,that are mitigated by the H_(2)S donor NaHS.Furthermore,ATP was found to promote the activation of the NOD-like receptor pyrin domain-containing 1(NLRP-1),caspase-1,and the cleavage of GSDMD,with NaHS significantly attenuating these effects.Conclusion Our research suggests that H2S protects SH-SY5Y cells from ATP-induced neurotoxicity through a mechanism mediated by the NLRP1,caspase-1,and GSDMD pathway.
文摘目的通过观察丹参多酚酸盐对核苷酸结合寡聚结构域样受体蛋白3(NOD-like receptor thermal protein domain associated protein 3,NLRP3)/天冬氨酸特异性半胱氨酸蛋白酶1(Cysteinyl aspartate specific proteinase-1,Caspase-1)/焦亡效应蛋白消皮素D(Gasdermin-D,GSDMD)细胞焦亡通路的影响,探讨改善膜性肾病大鼠肾损伤可能的作用机制。方法SD大鼠通过尾静脉注射阳离子牛血清白蛋白建立膜性肾病大鼠模型,造模成功后分为模型组、盐酸贝那普利组(10 mg/kg)、丹参多酚酸盐低、中、高剂量组(16.7、33.3、66.7 mg/kg),另设有正常组,每组均为10只。各给药组连续给药4周后,检测24小时尿蛋白定量(24-hour urinary protein quantity,24 h UTP)和血肌酐(serum creatinine,Scr)、血尿素氮(blood urea nitrogen,BUN)、血清总蛋白(total protein,TP)、血清白蛋白(serum albumin,ALB)、甘油三酯(triglyceride,TG)、总胆固醇(total cholesterol,TC)的含量;酶联免疫吸附法检测大鼠血清白细胞介素-1β(interleukin-1β,IL-1β)、IL-18;采用光镜、电镜、荧光显微镜下观察肾脏病理学变化;Western blot、实时荧光定量PCR法检测NLRP3、Caspase-1、GSDMD蛋白及mRNA表达。结果与模型组比较,各给药组24 h UTP水平明显降低(P<0.05,P<0.01),丹参多酚酸盐中、高剂量组和盐酸贝那普利组大鼠血清TP和ALB水平显著升高(P<0.01),TC和TG水平明显降低(P<0.05,P<0.01);普通光镜、荧光显微镜及电镜下观察可见模型组大鼠肾组织病理损伤明显,经各组药物治疗后病理损伤逐渐改善。与模型组比较,各给药组大鼠血清IL-1β、IL-18水平明显降低(P<0.05,P<0.01);与正常组比较,模型组大鼠肾脏NLRP3、Caspase-1、GSDMD蛋白及其mRNA表达显著升高(P<0.01);与模型组比较,各给药组大鼠肾组织NLRP3/Caspase-1/GSDMD蛋白及其mRNA表达水平明显降低(P<0.05,P<0.01),以丹参多酚酸盐高剂量组效果最佳。结论丹参多酚酸盐对膜性肾病大鼠肾保护作用与调控NLRP3/Caspase-1/GSDMD细胞焦亡通路,改善炎症状态,减轻肾损伤有关。
