全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

不同还原态叶酸和胆碱组合对人结肠腺癌细胞hmlh1和hmsh2转录水平的影响

Keywords: 氧化型叶酸,5-甲基四氢叶酸,胆碱,hmlh1,hmsh2

Full-Text   Cite this paper   Add to My Lib

Abstract:

?目的:探讨不同还原态叶酸和胆碱对人结肠腺癌细胞dna错配修复基因hmlh1和hmsh2转录水平的影响。方法:根据受试物在生理和离体情形下维持人基因组结构稳定的最适浓度,以含15、30、120nmol/l的氧化型叶酸(fa)或还原型叶酸(5-methf)与12μmol/l氯化胆碱(cc)组合,以及不同浓度cc(1.5、3μmol/l)与120nmol/lfa组合的修饰rpmi-1640培养基,对人结肠腺癌细胞株colo205进行20d干预培养。以实时荧光定量pcr检测hmlh1和hmsh2mrna水平。结果:受试细胞株hmlh1和hmsh2mrna水平与fa、5-methf和cc浓度呈显著负相关(p<0.01或p<0.05)。30和120nmol/l浓度下,5-methf对上述细胞hmlh1和hmsh2转录水平的影响显著强于同等浓度的fa(p<0.01或p<0.05)。结论:fa、5-methf和cc缺乏可上调结肠腺癌细胞hmlh1和hmsh2转录水平,这可能是细胞对叶酸和胆碱缺乏导致的dna损伤和异常甲基化的应答反应。

References

[1]  bevilacquara,simpsonaj.methylationofthehmlh1promoterbutnohmlh1mutationsinsporadicgastriccarcinomaswithhigh-levelmicrosatelliteinstability[j].intjcancer,2000,87(2):200-203.
[2]  zhangh,zhangs,cuij,etal.expressionandpromotermethylationstatusofmismatchrepairgenehmlh1andhmsh2inepithelialovariancancer[j].austnzjobstetgynaecol,2008,48(5):505-509.
[3]  汪旭,薛京伦.叶酸代谢与人类基因组稳定性的关系研究进展[j].国外医学:遗传学分册,2005,28(5):257-261.
[4]  rosssa.dietanddnamethylationinteractionsincancerprevention[j].annnyacadsci,2003,983:197-207.
[5]  kimuram,umegakik,higuchim,etal.methylenetetra-hydrofolatereductasec677tpolymorphism,folicacidandriboflavinareimportantdeterminantsofgenomestabilityinculturedhumanlymphocytes[j].jnutr,2004,134(1):48-56.
[6]  dacostaka,niculescumd,craciunescucn,etal.cholinedeficiencyincreaseslymphocyteapoptosisanddnadamageinhumans[j].amjclinnutr,2006,84(1):88-94.
[7]  vagelid,daniilz,dahabrehj,etal.phenotypicmismatchrepairhmsh2andhmlh1geneexpressionprofilesinprimarynon-smallcelllungcarcinomas[j].lungcancer,2009,64(3):282-288.
[8]  寸燕萍,倪娟,徐伟江,等.氧化型/还原型叶酸不足对人淋巴细胞hmsh2转录的影响[j].肿瘤防治研究杂志,2011,38(11):1320-1321.
[9]  livakkj,schmittgentd.analysisofrelativegeneexpressiondatausingreal-timequantitativepcrandthe2-δδctmethod[j].methods,2001,25(4):402-408.
[10]  fenechm.genomehealthnutrigenomicsandnutrigeneticsdiagnosisandnutritionaltreatmentofgenomedamageonanindividualbasis[j].foodchemtoxicol,2008,46(4):1365-1370.
[11]  zeiselsh.importanceofmethyldonorsduringreproduction[j].amjclinnutr,2009,89(2):673-677.
[12]  maedat,guanjz,oyamaj,etal.age-relatedchangesinsubtelomericmethylationinthenormaljapanesepopulation[j].jgerontolabiolscimedsci,2009,64(4):426-434.
[13]  kamorye,kolacseko,ottos,etal.hmlh1andhmsh2somaticinactivationmechanismsinsporadiccolorectalcancerpatients[j].patholoncolres,2003,9(4):236-241.
[14]  fenechm.folate,dnadamageandtheagingbrain[j].mechageingdev,2010,131(4):236-241.
[15]  duthiesj.folateandcancer:howdnadamage,repairandmethylationimpactoncoloncarcinogenesis[j].jinheritmetabdis,2011,34(1):101-109.
[16]  鲁琳,高微微,倪娟,等.胆碱与叶酸组合对人成淋巴细胞系dna损伤效应[j].营养学报,2010,32(1):26-29.
[17]  wangx,fenechm.acomparisonoffolicacidand5-methyltetrahydrofolateforpreventionofdnadamageandcelldeathinhumanlymphocytesinvitro[j].mutagenesis,2003,18(1):81-86.
[18]  fenechm.theroleoffolicacidandvitaminb12ingenomicstabilityofhumancells[j].mutatres,2001,475(1/2):57-67.
[19]  jonespa,baylinsb.thefundamentalroleofepigeneticeventsincancer[j].natrevgenet,2002,3(6):415-428.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133