目的:分析铁死亡相关基因长链酯酰辅酶A合成酶4(acyl-CoA synthetase long chain family member 4,ACSL4)、转铁蛋白受体(transferrin receptor, TFRC)及Hippo通路关键分子Yes相关蛋白(Yes-associated protein,YAP)在间皮瘤组织中的表...目的:分析铁死亡相关基因长链酯酰辅酶A合成酶4(acyl-CoA synthetase long chain family member 4,ACSL4)、转铁蛋白受体(transferrin receptor, TFRC)及Hippo通路关键分子Yes相关蛋白(Yes-associated protein,YAP)在间皮瘤组织中的表达水平、相关性及意义,观察YAP活化对间皮瘤细胞系211H侵袭转移能力及铁死亡敏感性的影响。方法:应用组织芯片技术和免疫组化法观察ACSL4、TFRC及YAP在30例间皮瘤组织和10例正常组织中的表达,分析蛋白水平及分布的相关性。GEPIA数据库分析基因ACSL4、TFRC和YAP在间皮瘤组织中的m RNA水平相关性。应用逆转录病毒载体于211H细胞中过表达活化型YAP S127A (serine-127突变为alanine),利用实时荧光定量PCR检测ACSL4及TFRC表达;利用划痕实验和transwell侵袭实验检测211H细胞迁移及侵袭能力;利用erastin刺激及SYTOX Green染色检测铁死亡敏感性。结果:间皮瘤组织中YAP细胞核表达、ACSL4及TFRC阳性表达率显著高于正常组织,差异均有统计学意义(P<0.001,P<0.001,P<0.0001)。经Spearman秩相关检验,ACSL4及TFRC蛋白在间皮瘤中的表达呈正相关(Spearman r=0.61,P=0.0003);YAP在细胞核中的表达与ACSL4表达呈正相关(Spearman r=0.4872,P=0.0063)。GEPIA数据库分析发现,YAP与ACSL4、ACSL4与TFRC在间皮瘤中的m RNA表达水平均呈正相关(Spearman r=0.33, P=0.0019;Spearman r=0.52,P=0.0000)。表达活化型YAP的211H细胞,ACSL4与TFRC m RNA水平与对照细胞相比均上调;迁移侵袭能力增强;铁死亡敏感性增强。结论:YAP、ACSL4及TFRC在间皮瘤组织中表达具有正相关性;YAP活化促进间皮瘤细胞侵袭转移能力,同时通过ACSL4及TFRC提高细胞对铁死亡诱导的敏感性。YAP、ACSL4及TFRC有望成为预测间皮瘤铁死亡敏感性的潜在生物学标志物。展开更多
Zhigancao decoction is a traditional prescription for treating irregular pulse and palpitations in China.As the monarch drug of Zhigancao decoction,the bioactive molecules of licorice against heart diseases remain elu...Zhigancao decoction is a traditional prescription for treating irregular pulse and palpitations in China.As the monarch drug of Zhigancao decoction,the bioactive molecules of licorice against heart diseases remain elusive.We established the HRESIMS-guided method leading to the isolation of three novel bicyclic peptides,glycnsisitins A-C(1-3),with distinctive C-C and C-O-C side-chain-toside-chain linkages from the roots of Glycyrrhiza uralensis(Licorice).Glycnsisitin A demonstrated stronger cardioprotective activity than glycnsisitins B and C in an in vitro model of doxorubicin(DOX)-induced cardiomyocyte injury.Glycnsisitin A treatment not only reduced the mortality of heart failure(HF)mice in a dose-dependent manner but also significantly attenuated DOX-induced cardiac dysfunction and myocardial fibrosis.Gene set enrichment analysis(GSEA)of the differentially expressed genes indicated that the cardioprotective effect of glycnsisitin A was mainly attributed to its ability to maintain iron homeostasis in the myocardium.Mechanistically,glycnsisitin A interacted with transferrin and facilitated its binding to the transferrin receptor(TFRC),which caused increased uptake of iron in cardiomyocytes.These findings highlight the key role of bicyclic peptides as bioactive molecules of Zhigancao decoction for the treatment of HF,and glycnsisitin A constitutes a promising therapeutic agent for the treatment of HF.展开更多
The clinical utilization of doxorubicin(Dox)in various malignancies is restrained by its major adverse effect:irreversible cardiomyopathy.Extensive studies have been done to explore the prevention of Dox cardiomyopath...The clinical utilization of doxorubicin(Dox)in various malignancies is restrained by its major adverse effect:irreversible cardiomyopathy.Extensive studies have been done to explore the prevention of Dox cardiomyopathy.Currently,ferroptosis has been shown to participate in the incidence and development of Dox cardiomyopathy.Sorting Nexin 3(SNX3),the retromer-associated cargo binding protein with important physiological functions,was identified as a potent therapeutic target for cardiac hypertrophy in our previous study.However,few study has shown whether SNX3 plays a critical role in Dox-induced cardiomyopathy.In this study,a decreased level of SNX3 in Dox-induced cardiomyopathy was observed.Cardiac-specific Snx3 knockout(Snx3-cKO)significantly alleviated cardiomyopathy by downregulating Dox-induced ferroptosis significantly.SNX3 was further demonstrated to exacerbate Dox-induced cardiomyopathy via induction of ferroptosis in vivo and in vitro,and cardiac-specific Snx3 transgenic(Snx3-cTg)mice were more susceptible to Dox-induced feroptosis and cardiomyopathy.Mechanistically,SNX3 facilitated the recycling of transferrin 1 receptor(TFRC)via direct interaction,disrupting iron homeostasis,increasing the accumulation of iron,triggering ferroptosis,and eventually exacerbating Dox-induced cardiomyopathy.Overall,these findings established a direct SNX3-TFRC-ferroptosis positive regulatory axis in Dox-induced cardiomyopathy and suggested that targeting SNX3 provided a new effective therapeutic strategy for Dox-induced cardiomyopathy through TFRCdependentferroptosis.展开更多
基金supported by Chinese Academy of Medical Sciences(CAMS)Innovation Fund for Medical Sciences(2022-I2M-2-002,2021-I2M-1-016,and 2022-I2M-1-014,China)the Beijing Outstanding Young Scientist Program(BJJWZYJH01201910023028,China)Chinese Academy of Medical Sciences(CAMS)Central Public-interest Scientific Institution Basal Research Fund(2018PT35004,Molecular Mechanism and Target Discovery of Metabolic Disorder and Tumorigenesis,CAMS Key Laboratory).
文摘Zhigancao decoction is a traditional prescription for treating irregular pulse and palpitations in China.As the monarch drug of Zhigancao decoction,the bioactive molecules of licorice against heart diseases remain elusive.We established the HRESIMS-guided method leading to the isolation of three novel bicyclic peptides,glycnsisitins A-C(1-3),with distinctive C-C and C-O-C side-chain-toside-chain linkages from the roots of Glycyrrhiza uralensis(Licorice).Glycnsisitin A demonstrated stronger cardioprotective activity than glycnsisitins B and C in an in vitro model of doxorubicin(DOX)-induced cardiomyocyte injury.Glycnsisitin A treatment not only reduced the mortality of heart failure(HF)mice in a dose-dependent manner but also significantly attenuated DOX-induced cardiac dysfunction and myocardial fibrosis.Gene set enrichment analysis(GSEA)of the differentially expressed genes indicated that the cardioprotective effect of glycnsisitin A was mainly attributed to its ability to maintain iron homeostasis in the myocardium.Mechanistically,glycnsisitin A interacted with transferrin and facilitated its binding to the transferrin receptor(TFRC),which caused increased uptake of iron in cardiomyocytes.These findings highlight the key role of bicyclic peptides as bioactive molecules of Zhigancao decoction for the treatment of HF,and glycnsisitin A constitutes a promising therapeutic agent for the treatment of HF.
基金supported by the National Natural Science Foundation of China(82173808,U21A20419,82270500)Natural Science Foundation of Guangdong Province(2021B1515020100,China)+3 种基金Guangzhou Basic and Applied Basic Research Project(202206080007,China)Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(2017BT01Y093,China)Guangdong Provincial Key Laboratory of Construction Foundation(2017B030314030,China)Academic promotion program of Shandong First Medical University(2019LJ003,China).
文摘The clinical utilization of doxorubicin(Dox)in various malignancies is restrained by its major adverse effect:irreversible cardiomyopathy.Extensive studies have been done to explore the prevention of Dox cardiomyopathy.Currently,ferroptosis has been shown to participate in the incidence and development of Dox cardiomyopathy.Sorting Nexin 3(SNX3),the retromer-associated cargo binding protein with important physiological functions,was identified as a potent therapeutic target for cardiac hypertrophy in our previous study.However,few study has shown whether SNX3 plays a critical role in Dox-induced cardiomyopathy.In this study,a decreased level of SNX3 in Dox-induced cardiomyopathy was observed.Cardiac-specific Snx3 knockout(Snx3-cKO)significantly alleviated cardiomyopathy by downregulating Dox-induced ferroptosis significantly.SNX3 was further demonstrated to exacerbate Dox-induced cardiomyopathy via induction of ferroptosis in vivo and in vitro,and cardiac-specific Snx3 transgenic(Snx3-cTg)mice were more susceptible to Dox-induced feroptosis and cardiomyopathy.Mechanistically,SNX3 facilitated the recycling of transferrin 1 receptor(TFRC)via direct interaction,disrupting iron homeostasis,increasing the accumulation of iron,triggering ferroptosis,and eventually exacerbating Dox-induced cardiomyopathy.Overall,these findings established a direct SNX3-TFRC-ferroptosis positive regulatory axis in Dox-induced cardiomyopathy and suggested that targeting SNX3 provided a new effective therapeutic strategy for Dox-induced cardiomyopathy through TFRCdependentferroptosis.
