中国学者发现促进乳腺癌生长转移关键
2021-8-10 来源:本站原创 浏览次数:次北京扁平疣治疗好医院 http://news.39.net/bjzkhbzy/210119/8605173.html
组蛋白赖氨酸甲基转移酶EZH2是参与组蛋白H3赖氨酸27三甲基化的主要转录调节因子,最终参与抑制基因染色质转录。EZH2突变或过表达与乳腺癌等多种癌症相关,可对抑癌基因产生抑制作用,不过具体机制尚不明确
年11月5日,美国《细胞》旗下《细胞报告》发表天津医科大学、中国医学科学院北京协医院国家癌症中心国家肿瘤临床医学研究中心、首都医科大学、温州医科大学的研究报告,探讨了EZH2转译后的精准调控机制及其对癌症发生的作用。
该研究发现,赖氨酸甲基转移酶SMYD2可以直接对EZH2的第位赖氨酸进行甲基化并增强其稳定性,并可被组蛋白H3K4脱甲基酶赖氨酸特异脱甲基酶LSD1抑制。SMYD2对于EZH2功能对于抑制一组支配若干癌症相关通路的基因至关重要。此外,SMYD2通过对EZH2第位赖氨酸进行甲基化,可以促进乳腺癌细胞繁殖、上皮→间质转化以及浸润,并且其表达水平显著提高于各种人类癌症。
因此,该研究结果表明,SMYD2及其所致EZH2甲基化之间的动态互相影响,对于调控EZH2聚集染色质和抑制转录的功能具有重要作用,可以促进乳腺癌的肿瘤生长和转移,有望成为新的治疗靶点。
CellRep.Nov5;29(6):-,e4.
RegulationofEZH2bySMYD2-MediatedLysineMethylationIsImplicatedinTumorigenesis.
YiZeng,RongfangQiu,YangYang,TianyangGao,YuZheng,WeiHuang,JieGao,KaiZhang,RuiqiongLiu,ShuangWang,YongqiangHou,WenqianYu,ShuaiLeng,DandanFeng,WeiLiu,XiZhang,YanWang.
TianjinMedicalUniversity,Tianjin,China;NationalCancerCenter/NationalClinicalResearchCenterforCancer/CancerHospital,ChineseAcademyofMedicalSciencesandPekingUnionMedicalCollege,Beijing,China;CapitalMedicalUniversity,Beijing,China;WenzhouMedicalUniversity,Wenzhou,Zhejiang,China.
HIGHLIGHTS
EZH2ismethylatedbySMYD2andisdemethylatedbyLSD1onlysine(K)
EZH2KmethylationenhancestheproteinstabilityofEZH2
SMYD2andEZH2collaborativelyparticipateintranscriptionalrepression
SMYD2coordinatesEZH2topromotebreastcancertumorigenesisandmetastasis
Thehistonemethyltransferaseenhancerofzestehomolog2(EZH2)isamastertranscriptionalregulatorinvolvedinhistoneH3lysine27trimethylation.Weaimedtoelucidatetheprecisepost-translationalregulationsofEZH2andtheirroleincancerpathogenesis.Here,weshowthatSETandMYNDdomaincontaining2(SMYD2)directlymethylatesEZH2atlysine(K)andenhancesitsstability,whichcanberelievedbythehistoneH3K4demethylaselysine-specificdemethylase1(LSD1).SMYD2iscriticalforEZH2functioninrepressingacohortofgenesgoverningseveralcancer-associatedpathways.Inaddition,SMYD2promotesbreastcancercellproliferation,epithelial-mesenchymaltransition,andinvasionthroughEZH2Kmethylation,anditismarkedlyupregulatedinvarioushumancancers.OurdatasuggestthatdynamiccrosstalkbetweenSMYD2-mediatedEZH2methylationplaysanimportantroleinfine-tuningEZH2functionsinchromatinrecruitmentandtranscriptionalrepression.
KEYWORDS:methylation;tumorigenesis;breastcancer;EZH2;SMYD2;post-translationalmodification
DOI:10./j.celrep..10.
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