Cancer metabolism and epigenetic alteration are two critical mechanisms for tumorigenesis and cancer progres?sion; however, the dynamic interplay between them remains poorly understood. As reported in the article enti...Cancer metabolism and epigenetic alteration are two critical mechanisms for tumorigenesis and cancer progres?sion; however, the dynamic interplay between them remains poorly understood. As reported in the article entitled "Chromatin remodeling factor LSH drives cancer progression by suppressing the activity of fumarate hydratase," which was recently published in Cancer Research, our group examined the physiological role of lymphocyte?specific heli?case(LSH) in nasopharyngeal carcinoma(NPC) by focusing on cancer progression and the tricarboxylic acid cycle. We found that LSH was overexpressed in NPC, and its expression associated with Epstein?Barr virus infection. We also found that LSH directly suppressed fumarate hydratase(FH), a key component of the tricarboxylic acid cycle, in combination with euchromatic histone?lysine N?methyltransferase 2(EHMT2), also known as G9 a. Depletion of FH promoted epithelial?mesenchymal transition(EMT). Moreover, LSH controlled expression of tricarboxylic acid cycle intermediates that promote cancer progression, including EMT, through activation by inhibitor of nuclear factor kappa?B kinase alpha(IKKα), a chromatin modifier and transcriptional activator. Our study showed that LSH plays a critical role in cancer progression, which has important implications for the development of novel strategies to treat NPC.展开更多
目的:探讨补脾益气方对哮喘模型大鼠肺组织核因子Kappa B(NF-κB)抑制剂的激酶β(the kinase of nuclear fac-tor-kappa B inhibitor β,IKKβ)的调控作用及对白介素8(IL-8)含量的影响。方法:SPF级雄性Wistar大鼠随机分为对照组(A)、哮...目的:探讨补脾益气方对哮喘模型大鼠肺组织核因子Kappa B(NF-κB)抑制剂的激酶β(the kinase of nuclear fac-tor-kappa B inhibitor β,IKKβ)的调控作用及对白介素8(IL-8)含量的影响。方法:SPF级雄性Wistar大鼠随机分为对照组(A)、哮喘组(B)、补脾益气方治疗组(C)。卵蛋白致敏和激发复制出哮喘模型,按照10 g.kg-1体重给予C组大鼠中药ig 1次/d,共21d。采用逆转录聚合酶链反应(RT-PCR)检测肺组织IKKβ的mRNA表达水平,采用免疫组化检测肺组织IKKβ的蛋白表达水平,采用酶联免疫吸附法(ELISA)测定支气管肺泡灌洗液IL-8的含量。结果:①肺组织IKKβ的mRNA的表达:B组显著高于A组(P<0.01);C组显著低于B组(P<0.05)。②肺组织IKKβ的蛋白表达水平:B组显著高于A组(P<0.01);C组显著低于B组(P<0.01)。③肺泡灌洗液IL-8含量:B组显著高于A组(P<0.01);C组显著低于B组(P<0.01)。结论:哮喘组大鼠肺组织IKKβmRNA和蛋白的表达水平显著增强,补脾益气方能有效抑制其表达,降低肺泡灌洗液IL-8含量,证明补脾益气方能有效抑制IKKβ信号转导的途径。展开更多
基金supported by grants from the National Basic Research Program of China[2015CB553903(YGT)]the National Natural Science Foundation of China[81171881 and 81372427(YGT)and 81271763(SL)]the Hunan Natural Science Foundation of China[12JJ1013(YGT)]
文摘Cancer metabolism and epigenetic alteration are two critical mechanisms for tumorigenesis and cancer progres?sion; however, the dynamic interplay between them remains poorly understood. As reported in the article entitled "Chromatin remodeling factor LSH drives cancer progression by suppressing the activity of fumarate hydratase," which was recently published in Cancer Research, our group examined the physiological role of lymphocyte?specific heli?case(LSH) in nasopharyngeal carcinoma(NPC) by focusing on cancer progression and the tricarboxylic acid cycle. We found that LSH was overexpressed in NPC, and its expression associated with Epstein?Barr virus infection. We also found that LSH directly suppressed fumarate hydratase(FH), a key component of the tricarboxylic acid cycle, in combination with euchromatic histone?lysine N?methyltransferase 2(EHMT2), also known as G9 a. Depletion of FH promoted epithelial?mesenchymal transition(EMT). Moreover, LSH controlled expression of tricarboxylic acid cycle intermediates that promote cancer progression, including EMT, through activation by inhibitor of nuclear factor kappa?B kinase alpha(IKKα), a chromatin modifier and transcriptional activator. Our study showed that LSH plays a critical role in cancer progression, which has important implications for the development of novel strategies to treat NPC.
