CAJ | 학술논문

目的:采用磁共振(magnetic resonance, MR)波谱技术测试不同性别大鼠尿液代谢物并用不同标准化方法进行预处理,探讨不同标准化方法对分析结果的影响.方法:大鼠尿液MR 图谱数据经过中心化(mean-centering and not scaling,Ctr)和自动规格化(unit variance scaling,UV)两种不同标准化方法处理后用正交偏最小二乘判别分析(orthogonal to partial least squares discriminant analysis, OPLS-DA)法分析,通过相关系数的计算确定不同性别大鼠尿液中含量有差异的代谢物.结果:数据进行中心化处理后判别出两组大鼠尿液中缬氨酸、乙酸、鸟氨酸、氨基马尿酸、苯乙胺、氧氨嘧啶、甲胺、二甲胺、尿囊素、延胡索酸、丙氨酸、柠檬酸和化学位移在δ4.14的一种未知代谢物等13种代谢物含量有差异.进行自动规格化处理后,判别出以上除柠檬酸外的12种代谢物以及硫胺、肌酸酐、甲酸和化学位移在δ2.92的一种未知代谢物等4种代谢物含量有差异.结论:自动规格化处理是代谢组学研究中比较灵敏的数据预处理手段.
목적:채용자공진(magnetic resonance, MR)파보기술측시불동성별대서뇨액대사물병용불동표준화방법진행예처리,탐토불동표준화방법대분석결과적영향.방법:대서뇨액MR 도보수거경과중심화(mean-centering and not scaling,Ctr)화자동규격화(unit variance scaling,UV)량충불동표준화방법처리후용정교편최소이승판별분석(orthogonal to partial least squares discriminant analysis, OPLS-DA)법분석,통과상관계수적계산학정불동성별대서뇨액중함량유차이적대사물.결과:수거진행중심화처리후판별출량조대서뇨액중힐안산、을산、조안산、안기마뇨산、분을알、양안밀정、갑알、이갑알、뇨낭소、연호색산、병안산、저몽산화화학위이재δ4.14적일충미지대사물등13충대사물함량유차이.진행자동규격화처리후,판별출이상제저몽산외적12충대사물이급류알、기산항、갑산화화학위이재δ2.92적일충미지대사물등4충대사물함량유차이.결론:자동규격화처리시대사조학연구중비교령민적수거예처리수단.
Objective To study metabonomics in the urine of rats of different genders by magnetic resonance (MR) with 2 normalization methods. Methods Different normalization methods such as mean-centering not scaling (Ctr) and unit variance scaling (UV) were used before orthogonal to partial least squares discriminant analysis(OPLS-DA). Distinguished metabolites in the urine of different gender rats were analyzed by calculating the correlation coefficients. Results The data normalized by Ctr before OPLS-DA analysis revealed high degree conception metabolites in the urine such as valine, alanine, acetate, ornithine, aminohippurate, phenylethylamine, cytosine, citrate, dimethylamine, allantoin, methylamine, fumarate and one unknown metabolite whose chemical shift was δ4.14. Data normalized by UV before OPLS-DA analysis revealed the above 12 high degree conception metabolites except citrate, and also low degree conception metabolites such as thiamine, creatinine, formate and one unknown metabolite whose chemical shift was δ2.92.Conclusion Unit variance scaling is a more effective normalization method in metabonomic analysis.