Colitis-associated colorectal cancer(CAC)is a major contributor to cancer-related mortality worldwide.Titanium dioxide(TiO_(2),E171),a widely used food additive,has been insufficiently studied regarding its effects on...Colitis-associated colorectal cancer(CAC)is a major contributor to cancer-related mortality worldwide.Titanium dioxide(TiO_(2),E171),a widely used food additive,has been insufficiently studied regarding its effects on macrophages within colon tumors during CAC development.In this study,CAC mouse models were used to investigate the biological impact of dietary E171 on macrophages in vivo,while lipopolysaccharide(LPS)-stimulated RAW264.7 macrophage cell lines were employed to elucidate the underlying mechanisms in vitro.We found that dietary E171 intake accelerated CAC development,exacerbated inflammatory responses and oxidative stress,and upregulated CAC-associated genes,including S100a8,S100a9,Lcn2,S100a11,Cxcl2,and interleukin-1α(Il-1α).E171 also increased the expression of S100A8,S100A9,NOD-like receptor family pyrin domain-containing 3(NLRP3),and gasdermin-D Nterminal(GSDMD-N)in macrophages within colon tumors.In inflammatory macrophages,E171 exposure enhanced cell viability,increased reactive oxygen species(ROS)levels,and elevated the expression and secretion of S100A8 and S100A9,consistent with in vivo histological observations.Furthermore,E171-induced secretion of S100A8 and S100A9 in macrophages was suppressed by specific inhibitors,including N-acetylcysteine(NAC,ROS inhibitor),MCC950(NLRP3 inhibitor),Z-YVAD-FMK(caspase 1 inhibitor),disulfiram(GSDMD inhibitor),and transfection of NLRP3 small interfering ribonucleic acid(siRNA).These results indicate that dietary E171 promotes CAC development by activating macrophages,with S100A8 and S100A9 serving as key mediators,and the NLRP3/caspase 1/GSDMD pathway acting as a critical mechanism.展开更多
目的探讨桂枝茯苓丸加味预防子宫内膜息肉术后复发的疗效及可能作用机制。方法将85例痰湿瘀结证子宫内膜息肉术后患者随机分为治疗组(43例)、对照组(42例),对照组给予地屈孕酮治疗,治疗组给予桂枝茯丸加味联合地屈孕酮治疗。治疗3个月...目的探讨桂枝茯苓丸加味预防子宫内膜息肉术后复发的疗效及可能作用机制。方法将85例痰湿瘀结证子宫内膜息肉术后患者随机分为治疗组(43例)、对照组(42例),对照组给予地屈孕酮治疗,治疗组给予桂枝茯丸加味联合地屈孕酮治疗。治疗3个月经周期,比较两组中医证候积分、Caspase-1/GSDMD信号通路[Gasdermin家族蛋白D(Gasdermin Family protein D,GSDMD)、半胱氨酸蛋白酶-1(caspase-1)、白细胞介素-1β(Interleukin-1β,IL-1β)、白细胞介素-18(Interleukin-18,IL-18)]、增殖和凋亡基因[增殖细胞核相关抗原Ki-67(Ki-67)、B细胞淋巴瘤/白血病-2基因(B-cell lymphoma/leukemia-2 gene,Bc1-2)]、临床疗效、不良反应及复发率。结果①治疗组经期延长/经量过多、经色紫黯/淋漓不尽、经行泄泻、经期出血、经行腹痛评分及中医证候总分低于对照组(P<0.05)。②治疗组子宫内膜组织GSDMD、Caspase-1、IL-1β、IL-18表达低于对照组(P<0.05)。③治疗组子宫内膜组织Ki-67、Bcl-2表达低于对照组(P<0.05)。④治疗组总有效率93.02%(40/43)高于对照组76.19%(32/42)(χ^(2)=4.647,P<0.05)。⑤治疗组不良反应(11.63%,5/43)、复发率(4.65%,2/43)低于对照组33.33%(14/42)、21.43%(9/42)(χ^(2)=5.767,5.308,P<0.05)。结论桂枝茯苓丸加味能够提高子宫内膜息肉术后患者临床疗效,减少不良反应及复发率,可能与抑制Caspase-1/GSDMD信号通路、拮抗炎症反应与下调细胞增殖和凋亡基因表达等因素有关。展开更多
基金supported by the National Natural Science Foundation of China(Nos.81974441 and 82203619)the Science and Technology Planning Project of Shenzhen Municipality(Nos.JCYJ20190814105619048 and JCYJ20220530154202005)。
文摘Colitis-associated colorectal cancer(CAC)is a major contributor to cancer-related mortality worldwide.Titanium dioxide(TiO_(2),E171),a widely used food additive,has been insufficiently studied regarding its effects on macrophages within colon tumors during CAC development.In this study,CAC mouse models were used to investigate the biological impact of dietary E171 on macrophages in vivo,while lipopolysaccharide(LPS)-stimulated RAW264.7 macrophage cell lines were employed to elucidate the underlying mechanisms in vitro.We found that dietary E171 intake accelerated CAC development,exacerbated inflammatory responses and oxidative stress,and upregulated CAC-associated genes,including S100a8,S100a9,Lcn2,S100a11,Cxcl2,and interleukin-1α(Il-1α).E171 also increased the expression of S100A8,S100A9,NOD-like receptor family pyrin domain-containing 3(NLRP3),and gasdermin-D Nterminal(GSDMD-N)in macrophages within colon tumors.In inflammatory macrophages,E171 exposure enhanced cell viability,increased reactive oxygen species(ROS)levels,and elevated the expression and secretion of S100A8 and S100A9,consistent with in vivo histological observations.Furthermore,E171-induced secretion of S100A8 and S100A9 in macrophages was suppressed by specific inhibitors,including N-acetylcysteine(NAC,ROS inhibitor),MCC950(NLRP3 inhibitor),Z-YVAD-FMK(caspase 1 inhibitor),disulfiram(GSDMD inhibitor),and transfection of NLRP3 small interfering ribonucleic acid(siRNA).These results indicate that dietary E171 promotes CAC development by activating macrophages,with S100A8 and S100A9 serving as key mediators,and the NLRP3/caspase 1/GSDMD pathway acting as a critical mechanism.
文摘目的探讨桂枝茯苓丸加味预防子宫内膜息肉术后复发的疗效及可能作用机制。方法将85例痰湿瘀结证子宫内膜息肉术后患者随机分为治疗组(43例)、对照组(42例),对照组给予地屈孕酮治疗,治疗组给予桂枝茯丸加味联合地屈孕酮治疗。治疗3个月经周期,比较两组中医证候积分、Caspase-1/GSDMD信号通路[Gasdermin家族蛋白D(Gasdermin Family protein D,GSDMD)、半胱氨酸蛋白酶-1(caspase-1)、白细胞介素-1β(Interleukin-1β,IL-1β)、白细胞介素-18(Interleukin-18,IL-18)]、增殖和凋亡基因[增殖细胞核相关抗原Ki-67(Ki-67)、B细胞淋巴瘤/白血病-2基因(B-cell lymphoma/leukemia-2 gene,Bc1-2)]、临床疗效、不良反应及复发率。结果①治疗组经期延长/经量过多、经色紫黯/淋漓不尽、经行泄泻、经期出血、经行腹痛评分及中医证候总分低于对照组(P<0.05)。②治疗组子宫内膜组织GSDMD、Caspase-1、IL-1β、IL-18表达低于对照组(P<0.05)。③治疗组子宫内膜组织Ki-67、Bcl-2表达低于对照组(P<0.05)。④治疗组总有效率93.02%(40/43)高于对照组76.19%(32/42)(χ^(2)=4.647,P<0.05)。⑤治疗组不良反应(11.63%,5/43)、复发率(4.65%,2/43)低于对照组33.33%(14/42)、21.43%(9/42)(χ^(2)=5.767,5.308,P<0.05)。结论桂枝茯苓丸加味能够提高子宫内膜息肉术后患者临床疗效,减少不良反应及复发率,可能与抑制Caspase-1/GSDMD信号通路、拮抗炎症反应与下调细胞增殖和凋亡基因表达等因素有关。
