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1、·888·临床儿科杂志第32卷第9期2014年9月JClinPediatrVol.32No.9Sep.2014doi:10.3969j.issn.1000-3606.2014.09.022气相色谱-质谱法检测遗传代谢性疾病高危患儿彭 薇 张万巧 封志纯北京军区总医院附属八一儿童医院(北京 100700)摘要: 目的 了解北京地区遗传性代谢性疾病(IMD)的发病情况。方法 利用气相色谱-质谱法(GC-MS)对IMD高危儿进行尿液化学分析。结果 411例IMD高危儿中检测出代谢异常269例(65.5%),其中确诊IMD19例(4.6%),包括甲基丙二酸血症15例,丙酸血症、
2、高苯丙氨酸血症、尿素循环异常和焦谷氨酸尿症各1例;疑似IMD22例(5.4%),包括乳酸血症13例,原发性甘油尿症5例,脂肪酸代谢异常4例,Citrin缺陷症、酪氨酸血症、半乳糖血症、3-甲基巴豆酰辅酶A羧化酶缺乏症、枫糖尿症各1例;其他代谢异常228例(55.5%),表现为尿乳酸、蔗糖、乳糖、半乳糖、N-乙酰酪氨酸、琥珀酸、双羧酸水平增高以及丝氨酸/苏氨酸比例异常等。结论 甲基丙二酸血症为北京地区最常见的IMD,对不能明确病因的患儿应尽早行GC-MS检测,必要时联合应用串联质谱检测和基因分析诊断。关键词: 气相色谱-质谱法; 遗传性代谢病; 尿素酶预处理; 儿童Ana
3、lysisofinheritedmetabolicdiseaseinBeijingbygaschromatography-massspectrometryPENGWei,ZHANGWanqiao,FENGZhichun(BayiChildren’sHospitalAffiliatedtoBeijingMilitaryRegionGeneralHospital,Beijing100700,China)Abstract:ObjectiveTolearntheincidenceoftheinheritedmetabolicdiseasesinBeijing.MethodsUr
4、inesampleswereanalyzedbygaschromatography-massspectrometry(GC-MS)forinheritedmetabolicdiseasesinhighriskyinfantsinBeijing.ResultsUrinesamplesfrom411highriskyinfantswereanalyzedbygaschromatography-massspectrometry.269cases(65.5%)weredetectedtohavemetabolicabnormalities,including19cases(4.
5、6%)diagnosedofinheritedmetabolicdiseasesinwhichtherewere15casesofmethylmalonicacademiaand1caseeachofpropionicacademia,hyperphenylalaninemia,ureacycleabnormalityandpyroglutamicaciduria.Therewere22suspectedcases(5.4%)ofinheritedmetabolicdiseasesincluding13casesoflacticacidosis,5casesofprim
6、aryglycerolaciduria,4casesoffattyacidmetabolicdisordersincluding1caseeachofCitrindefects,tyrosinemia,galactosemia3-methylcrotonoylcoenzymeAcarboxylasedeficiencyandmaplesyrupurinedisease.Therewerealso228cases(55.5%)ofmetabolicabnormalities,suchasincreasingurinelevelsoflacticacid,sucrose,l
7、actose,galactose,N-acetyltyrosine,succinicacid,dicarboxylicacidandabnormalserine/threonineratio.ConclusionsMethylmalonicacademiamightbethemostcommoninheritedmetabolicdiseasesinhighriskyinfantsinBeijing.Forinfantswithclinicalmanifestationsbutunclearetiology,GC-MSshouldbepe