CN114686559B - 一种检测生物样本中同型半胱氨酸含量的试剂盒及其制备与使用方法 - Google Patents
一种检测生物样本中同型半胱氨酸含量的试剂盒及其制备与使用方法 Download PDFInfo
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Abstract
本发明采用基因工程技术制备的重组同型半胱氨酸甲基转移酶、重组谷氨酸脱氢酶、重组S‑腺苷同型半胱氨酸水解酶、重组腺苷脱氨酶为主要组份,研制出可用于检测生物样本中同型半胱氨酸含量的试剂盒。该试剂盒可以在适当条件下存储2年,试剂性能稳定;可以方便、快速、准确地检测多种生物样本中同型半胱氨酸的含量;并且可以在全自动生化分析仪上同时测定多个样本,实现同型半胱氨酸的高通量、快速化测定,精确度和检测效率相比之前都有显著提高;同时实现了检测过程的全自动化,方便检测人员操作,易于推广使用。
Description
技术领域
本发明涉及生物医学检验技术领域,具体来说涉及一种检测生物样本中同型半胱氨酸含量的试剂盒及其制备与使用方法。
背景技术
同型半胱氨酸(Homocysteine,HCY),又称高半胱氨酸,是由细胞内的甲硫氨酸去甲基后形成的一种硫醇氨基酸,由S-腺苷同型半胱氨酸水解而来,同时也是胱硫醚β合成酶合成胱硫醚的底物。血液中的总同型半胱氨酸包括同型半胱氨酸、同型半胱氨酸二硫化合物和胱氨酸-同型半胱氨酸三种形式,它们大部分以蛋白结合方式存在,小部分处于游离状态。血浆同型半胱氨酸是蛋氨酸循环的中间产物,受到遗传因素、营养状况、肝肾功能及一些疾病时的代谢状况的影响,维生素B6、叶酸等物质可在一定程度上降低其水平。已开展的众多研究表明,的一种独立危险因素,同型半胱氨酸与心、脑血管疾病以及外周血管疾病密切相关,它是评估心血管疾病发生过程中的一个重要的风险因子,血液中升高的同型半胱氨酸会刺激血管壁引起动脉血管损伤,导致炎症和管壁的斑块形成,最终引起心脏血流受阻。在慢性肾功能不全、牛皮癣、维生素B12 缺乏等疾病的患者中也存在同型半胱氨酸代谢紊乱。同型半胱氨酸检测在临床上已有多年应用史,其安全性及可靠性已得到验证。另有研究表明,同型半胱氨酸可作为神经管畸形、先兆子痫、帕金森氏病、老年痴呆、胎儿生长迟缓、动脉粥样硬化、慢性肾功能不全、牛皮癣、维生素B12缺乏、叶酸缺乏等多种疾病的临床辅助诊断依据,其临床意义极为重要。
目前,临床上测定生物样本中同型半胱氨酸的方法较多,主要为同位素法、色谱法、免疫学法等。但现有方法都较为费时费力,且检测成本较高,不适合大批量临床样本的测定。目前市场上缺乏稳定性好、灵敏度高、特异性强的同型半胱氨酸检测试剂,尤其是质量好的自动化检验试剂。因此,研发一种质量达到临床要求、实用性强、性价比高,可应用于全自动生化分析仪的同型半胱氨酸检测试剂盒已成为国内外体外诊断试剂行业的热点。
发明内容
为了克服现有技术存在的缺陷,本发明的目的在于提供一种检测生物样本中同型半胱氨酸含量的试剂盒及其制备与使用方法。
本发明解决其技术问题所采用的技术方案是:本发明第一方面提供了一种检测生物样本中同型半胱氨酸含量的试剂盒,包括R1试剂与R2试剂两种彼此独立的试剂,其中,
所述R1试剂组成成分为:0.01~1.00 mmol/L S-腺苷甲硫氨酸盐、0.02~2.00mmol/L β-烟酰胺腺嘌呤二核苷酸还原型、0.05~5.00 mmol/L三(2-羧乙基)磷氯化氢、0.5~50.0 mmol/L α-酮戊二酸、5.0~500.0 mmol/L三羟甲基氨基甲烷、质量分数为0.01~0.5%的防腐剂、溶剂为去离子水;
所述R2试剂组成成分为:0.5~50.0 KU/L重组同型半胱氨酸甲基转移酶、1.0~100.0 KU/L重组谷氨酸脱氢酶、0.3~30.0 KU/L重组S-腺苷同型半胱氨酸水解酶、0.5~50.0 KU/L重组腺苷脱氨酶、5.0~500.0 mmol/L三羟甲基氨基甲烷、质量分数为0.01~0.5%的防腐剂、溶剂为去离子水。
上述检测生物样本中同型半胱氨酸含量的试剂盒,包括R1试剂与R2试剂两种彼此独立的试剂,其中,
所述R1试剂组成成分为:0.1 mmol/L S-腺苷甲硫氨酸盐、0.2 mmol/Lβ-烟酰胺腺嘌呤二核苷酸还原型、0.5 mmol/L三(2-羧乙基)磷氯化氢、5.0 mmol/Lα- 酮戊二酸、50.0mmol/L三羟甲基氨基甲烷、质量分数为0.05%的防腐剂、溶剂为去离子水;
所述R2试剂组成成分为:5.0 KU/L重组同型半胱氨酸甲基转移酶、10.0 KU/L重组谷氨酸脱氢酶、3.0 KU/L重组S-腺苷同型半胱氨酸水解酶、5.0 KU/L重组腺苷脱氨酶、50.0mmol/L三羟甲基氨基甲烷、质量分数为0.05%的防腐剂、溶剂为去离子水。
上述检测生物样本中同型半胱氨酸含量的试剂盒,所述防腐剂为Proclin-300、NaN3、G418、叠氮钠、硫柳汞中的一种。
上述检测生物样本中同型半胱氨酸含量的试剂盒,所述防腐剂为Proclin-300。
上述检测生物样本中同型半胱氨酸含量的试剂盒,所述重组同型半胱氨酸甲基转移酶的氨基酸序列如序列表SEQ ID NO:1所示,重组谷氨酸脱氢酶的氨基酸序列如序列表SEQ ID NO:2所示,重组S-腺苷同型半胱氨酸水解酶的氨基酸序列如序列表SEQ ID NO:3所示,重组腺苷脱氨酶的氨基酸序列如序列表SEQ ID NO:4所示。
重组同型半胱氨酸甲基转移酶的氨基酸序列(SEQ ID NO:1)具体如下:
MKLLDLLSKGIVIGDGAVGTLLHSHGLQSSFEELNVSDPDLIISIHVQYVAAGADVIQTNTYGANEAKLRMYGLENQVTEINRAAVKLAKASVTDKNAILGTIGGMKHIGAVTTTDMEREFMLLEQAGALLEEQKDGLLLETFYDEFELLHAVKVLRKQTNIPIVAQLALHEAGTTQNGNDVNEILKHLIDYGANVVGLNCQLGPLHMTEAFKMISIPQNGYLSPYPNAGLPNYVEGRYVYEGSPAYFEAMTPRFIEQGIRLLGGCCGTTAEHIQSMKHAVANVTPVIEKDTIQRPKVVHTHEKRSKAHVTLAEKAKKQTTVVVELDPPKTLDTQRFFEGARALKRAGADAITLADNSLASPRISNMAMGALLTKHDIPVLTHLTCRDHNVIGLQSHLLGLSALLMEEVLALTGDPARVGDFPGATSVYDLSSIELIKMIKEMNDGRSILGKSLGPATRFSVGGAFNPHVRHLKAAVKRMERKIDAGAEYFLTQPIYDIALIEEVYEATKHLEQPIFIGIMPLVSKRNADFLHFEVPGITLPEEIRERMDGHETKEAAIEEGIRISQELIDAAMKYFNGIYLITPFLKYEIGEHLVKYVREKQEVKEGIN。
重组谷氨酸脱氢酶的氨基酸序列(SEQ ID NO:2)具体如下:
MSAKQVSKDEEKEALNLFLSTQTIIKEALRKLGYPGDMYELMKEPQRMLTVRIPVKMDNGSVKVFTGYRSQHNDAVGPTKGGVRFHPPVNEEEVKALSIWMTLKCGIANLPYCGGKGGIICDPRTMSFGELERLSRGYVRAISQIVGPTKDIPAPDVYTNSQIMAWMMDEYSRLREFLSPGFITGKPLVLGGSQGRETATAQGVTICIEEAVKKKGIKLQNARIQIQGFGNAGSFLAKFMHDAGAKVIGISDANGGLYNPDGLDIPYLDDKRDSFGMVTNLFTDVITNEELLEKECDILVPAAISNQITAKNAHNIQASIVVEAANGPTTIDATKILNERGVLLVPDILASAGGVTVSYFNWVQNNQGYYWSEEEVAEKLRSVMVSSFETIYQTAATHKVDMRLAAYMTGIRKSAEASRFRGWV。
重组S-腺苷同型半胱氨酸水解酶的氨基酸序列(SEQ ID NO:3)具体如下:
GIDPFTMNAKPGFTDYIVKDIALADFGRKEISLAETEMPGLMATKEEYGPKQPLKGARIAGSLHMTIQTAVLIETLAALGADIRWVSCNIYSTQDHAAAAIAAAGIPVFAVKGETLTEYWDYTAKLFDWHGGGTRNMILDDGGDATMLVHAGYRAEQGDTAFLDKPGSEEEEIFYALVKRLLKEKPKGWFAEIAKNIKGVSEETTTGVHRLYEMANKGTLLFPAINVNDSVTKSKFDNLYGCRESLVDGIRRGTDVMLSGKVAMVAEFGDVGKGSAASLRQAGCRVMVSEVDPICALQAAMEGYEVVTMEDAAPRADIFVTATGNKDIITIEHMRAMKDRAIVCNIGHFDNEIQIASLRNLKWTNIKPQVDEIEFPDKHRIIMLSEGRLVNLGNAMGHPSQVMSASFTNQTLAQIELFANNKDSKYAKKVYVLPKTLDEKVARLTLAKIGVKLTELRKDQADYIGVKQEGPYKSDHYRY。
重组腺苷脱氨酶的氨基酸序列(SEQ ID NO:4)具体如下:
MHTHSTPPDVEALIRDLPKVELHVHLEGSMPADTLFDLARRHGKTDVPDTPEALRDWYVFTDFPHFVEVYLASVATLREEQDFALLAGAVAERLAAQNVRYAEMHVSLYTHLMRGVPARVVFDGIEEARRAAESRHGIQLRWIPDFPADFGLESAEATVEAVLRDAPPSVVGFGVGGVETPLEQYAGVFGRARAAGLASLPHAGEHGGPERVREALDALRAERIGHGIDSMRDEALVGRLAEGRIPVDVSPTSNVCTRAVAELGDHPLPRMLEAGLLVTLNTDDPTMFGTDLNGEYRAAHTLGLDAADHVGLAANGVHASYLGAARRHALLAEIGEVAARHGVDPVRVAALR。
本发明第二方面提供了一种如上所述的检测生物样本中同型半胱氨酸含量的试剂盒的制备方法,包括以下步骤:
(1)R1试剂的制备:称取S-腺苷甲硫氨酸盐、β-烟酰胺腺嘌呤二核苷酸还原型、三(2-羧乙基)磷氯化氢、α- 酮戊二酸、三羟甲基氨基甲烷、防腐剂,依次加入去离子水中,搅拌溶解,定容至终浓度分别为S-腺苷甲硫氨酸盐0.01~1.00 mmol/L、β-烟酰胺腺嘌呤二核苷酸还原型0.02~2.00 mmol/L、三(2-羧乙基)磷氯化氢0.05~5.00 mmol/L、α- 酮戊二酸0.5~50.0 mmol/L、三羟甲基氨基甲烷5.0~500.0 mmol/L、防腐剂质量分数为0.01~0.5%,即得;
(2)R2试剂的制备:称取重组同型半胱氨酸甲基转移酶、重组谷氨酸脱氢酶、重组S-腺苷同型半胱氨酸水解酶、重组腺苷脱氨酶、三羟甲基氨基甲烷、防腐剂,依次加入去离子水中,搅拌溶解,定容至终浓度分别为重组同型半胱氨酸甲基转移酶0.5~50.0 KU/L、重组谷氨酸脱氢酶1.0~100.0 KU/L、重组S-腺苷同型半胱氨酸水解酶0.3~30.0 KU/L、重组腺苷脱氨酶0.5~50.0 KU/L、三羟甲基氨基甲烷5.0~500.0 mmol/L、防腐剂质量分数为0.01~0.5%,即得。
所述的检测生物样本中同型半胱氨酸含量的试剂盒的制备方法,包括以下步骤:
(1)R1试剂的制备:称取S-腺苷甲硫氨酸盐、β-烟酰胺腺嘌呤二核苷酸还原型、三(2-羧乙基)磷氯化氢、α- 酮戊二酸、三羟甲基氨基甲烷、Proclin-300,依次加入去离子水中,搅拌溶解,定容至终浓度分别为S-腺苷甲硫氨酸盐0.1 mmol/L、β-烟酰胺腺嘌呤二核苷酸还原型0.2 mmol/L、三(2-羧乙基)磷氯化氢0.5mmol/L、α- 酮戊二酸5.0mmol/L、三羟甲基氨基甲烷50.0 mmol/L、Proclin-300质量分数为0.05%,即得;
(2)R2试剂的制备:称取重组同型半胱氨酸甲基转移酶、重组谷氨酸脱氢酶、重组S-腺苷同型半胱氨酸水解酶、重组腺苷脱氨酶、三羟甲基氨基甲烷、Proclin-300,依次加入去离子水中,搅拌溶解,定容至终浓度分别为重组同型半胱氨酸甲基转移酶5.0 KU/L、重组谷氨酸脱氢酶10.0 KU/L、重组S-腺苷同型半胱氨酸水解酶3.0 KU/L、重组腺苷脱氨酶5.0KU/L、三羟甲基氨基甲烷50.0 mmol/L、Proclin-300质量分数为0.05%,即得。
本发明第三方面提供了一种如上所述的检测生物样本中同型半胱氨酸含量的试剂盒的使用方法,包括以下步骤:
在全自动生化分析仪中加入待检生物样本,R1试剂,混匀,37℃温育5.0分钟;然后加入R2试剂,混匀,使用340 nm主波长、405nm副波长进行检测,37℃恒温2.5分钟后,读取初始吸光度,连续监测2.5分钟的吸光度变化率,由生化分析仪自动计算待测样本浓度数值。
所述的检测生物样本中同型半胱氨酸含量的试剂盒的使用方法,包括以下步骤:
在全自动生化分析仪中加入待测生物样本13μL,R1试剂240μL,混匀,37℃温育5.0分钟;然后加入R2试剂65μL,混匀,使用340 nm主波长、405nm副波长进行检测,37℃恒温2.5分钟后,读取初始吸光度,连续监测2.5分钟的吸光度变化率,由生化分析仪自动计算待测样本浓度数值。
上述检测生物样本中同型半胱氨酸含量的试剂盒的使用方法,所述待检生物样本为血清、血浆、全血、脑脊液、组织液、羊水、淋巴液、尿液、唾液中的一种。
本发明的检测原理是:同型半胱氨酸(Hcy)经还原剂(TCEP)还原后,在重组同型半胱氨酸甲基转移酶(cHMTase)的催化下,与S-腺苷甲硫氨酸盐(SAM)反应,生成S-腺苷同型半胱氨酸(SAH)和甲硫氨酸(Met)。SAH 在重组S-腺苷同型半胱氨酸水解酶(cSAHase)的作用下水解为同型半胱氨酸和腺苷(Ado)。生成的同型半胱氨酸反复循环,不断产生腺苷。腺苷在重组腺苷脱氨酶(cADA)的作用下立即水解成氨和次黄嘌呤(Inosine),氨与α-酮戊二酸(2-Oxoglutarate)在重组谷氨酸脱氢酶(cGLDH)的作用下,使β-烟酰胺腺嘌呤二核苷酸还原型(NADH)转化为β-烟酰胺腺嘌呤二核苷酸氧化型(NAD+),NADH 在340 nm 波长处有吸收峰,通过监测340 nm 处光吸收值下降的速率即可以计算出样本中同型半胱氨酸的含量。
与现有技术相比,本发明具有以下技术优点:
采用基因工程技术制备的重组同型半胱氨酸甲基转移酶、重组谷氨酸脱氢酶、重组S-腺苷同型半胱氨酸水解酶、重组腺苷脱氨酶为主要组份,研制出可用于检测生物样本中同型半胱氨酸含量的试剂盒。该试剂盒可以在适当条件下存储2年,试剂性能稳定;可以方便、快速、准确地检测多种生物样本中同型半胱氨酸的含量;并且可以在全自动生化分析仪上同时测定多个样本,实现同型半胱氨酸的高通量、快速化测定,精确度和检测效率相比之前都有显著提高;同时实现了检测过程的全自动化,方便检测人员操作,易于推广使用。
具体实施方式
以下结合具体实施例进一步说明,但本发明不仅限于这些实施例。
实施例一
本发明检测生物样本中同型半胱氨酸含量的试剂盒,包括R1试剂与R2试剂两种彼此独立的试剂,其中,
所述R1试剂组成成分为:0.01 mmol/L S-腺苷甲硫氨酸盐、0.02 mmol/Lβ-烟酰胺腺嘌呤二核苷酸还原型、0.05 mmol/L三(2-羧乙基)磷氯化氢、0.5 mmol/L α-酮戊二酸、5.0 mmol/L三羟甲基氨基甲烷、质量分数为0.01%的Proclin-300、溶剂为去离子水;
所述R2试剂组成成分为:0.5 KU/L 重组同型半胱氨酸甲基转移酶、1.0 KU/L重组谷氨酸脱氢酶、0.3 KU/L 重组S-腺苷同型半胱氨酸水解酶、0.5 KU/L重组腺苷脱氨酶、5.0mmol/L三羟甲基氨基甲烷、质量分数为0.01%的Proclin-300、溶剂为去离子水。
实施例二
本发明检测生物样本中同型半胱氨酸含量的试剂盒,包括R1试剂与R2试剂两种彼此独立的试剂,其中,
所述R1试剂组成成分为:1.00 mmol/L S-腺苷甲硫氨酸盐、2.00 mmol/Lβ-烟酰胺腺嘌呤二核苷酸还原型、5.00 mmol/L三(2-羧乙基)磷氯化氢、50.0 mmol/L α-酮戊二酸、500.0 mmol/L三羟甲基氨基甲烷、质量分数为0.5%的Proclin-300、溶剂为去离子水;
所述R2试剂组成成分为:50.0 KU/L重组同型半胱氨酸甲基转移酶、100.0 KU/L重组谷氨酸脱氢酶、30.0 KU/L重组S-腺苷同型半胱氨酸水解酶、50.0 KU/L重组腺苷脱氨酶、500.0 mmol/L三羟甲基氨基甲烷、质量分数为0.5%的Proclin-300、溶剂为去离子水。
实施例三
本发明检测生物样本中同型半胱氨酸含量的试剂盒,包括R1试剂与R2试剂两种彼此独立的试剂,其中,
所述R1试剂组成成分为:0.1 mmol/L S-腺苷甲硫氨酸盐、0.2 mmol/L β-烟酰胺腺嘌呤二核苷酸还原型、0.5 mmol/L三(2-羧乙基)磷氯化氢、5.0 mmol/L α-酮戊二酸、50.0 mmol/L三羟甲基氨基甲烷、质量分数为0.05%的Proclin-300、溶剂为去离子水;
所述R2试剂组成成分为:5.0 KU/L重组同型半胱氨酸甲基转移酶、10.0 KU/L重组谷氨酸脱氢酶、3.0 KU/L重组S-腺苷同型半胱氨酸水解酶、5.0 KU/L重组腺苷脱氨酶、50.0mmol/L三羟甲基氨基甲烷、质量分数为0.05%的Proclin-300、溶剂为去离子水。
实施例四
本发明检测生物样本中同型半胱氨酸含量的试剂盒的制备方法,包括以下步骤:
(1)R1试剂的制备:称取S-腺苷甲硫氨酸盐、β-烟酰胺腺嘌呤二核苷酸还原型、三(2-羧乙基)磷氯化氢、α- 酮戊二酸、三羟甲基氨基甲烷、Proclin-300,依次加入去离子水中,搅拌溶解,定容至终浓度分别为S-腺苷甲硫氨酸盐0.01 mmol/L、β-烟酰胺腺嘌呤二核苷酸还原型0.02 mmol/L、三(2-羧乙基)磷氯化氢0.05 mmol/L、α-酮戊二酸0.5 mmol/L、三羟甲基氨基甲烷5.0 mmol/L、Proclin-300质量分数为0.01,即得;
(2)R2试剂的制备:称取重组同型半胱氨酸甲基转移酶、重组谷氨酸脱氢酶、重组S-腺苷同型半胱氨酸水解酶、重组腺苷脱氨酶、三羟甲基氨基甲烷、Proclin-300,依次加入去离子水中,搅拌溶解,定容至终浓度分别为重组同型半胱氨酸甲基转移酶0.5 KU/L、重组谷氨酸脱氢酶1.0 KU/L、重组S-腺苷同型半胱氨酸水解酶0.3 KU/L、重组腺苷脱氨酶0.5KU/L、三羟甲基氨基甲烷5.0 mmol/L、Proclin-300质量分数为0.01,即得。
实施例五
本发明检测生物样本中同型半胱氨酸含量的试剂盒的制备方法,包括以下步骤:
(1)R1试剂的制备:称取S-腺苷甲硫氨酸盐、β-烟酰胺腺嘌呤二核苷酸还原型、三(2-羧乙基)磷氯化氢、α- 酮戊二酸、三羟甲基氨基甲烷、Proclin-300,依次加入去离子水中,搅拌溶解,定容至终浓度分别为S-腺苷甲硫氨酸盐1.00 mmol/L、β-烟酰胺腺嘌呤二核苷酸还原型2.00 mmol/L、三(2-羧乙基)磷氯化氢5.00 mmol/L、α-酮戊二酸50.0 mmol/L、三羟甲基氨基甲烷500.0 mmol/L、Proclin-300质量分数为0.5%,即得;
(2)R2试剂的制备:称取重组同型半胱氨酸甲基转移酶、重组谷氨酸脱氢酶、重组S-腺苷同型半胱氨酸水解酶、重组腺苷脱氨酶、三羟甲基氨基甲烷、Proclin-300,依次加入去离子水中,搅拌溶解,定容至终浓度分别为重组同型半胱氨酸甲基转移酶50.0 KU/L、重组谷氨酸脱氢酶100.0 KU/L、重组S-腺苷同型半胱氨酸水解酶30.0 KU/L、重组腺苷脱氨酶50.0 KU/L、三羟甲基氨基甲烷500.0 mmol/L、Proclin-300质量分数为0.5%,即得。
实施例六
本发明检测生物样本中同型半胱氨酸含量的试剂盒的制备方法,包括以下步骤:
(1)R1试剂的制备:称取S-腺苷甲硫氨酸盐、β-烟酰胺腺嘌呤二核苷酸还原型、三(2-羧乙基)磷氯化氢、α-酮戊二酸、三羟甲基氨基甲烷、Proclin-300,依次加入去离子水中,搅拌溶解,定容至终浓度分别为S-腺苷甲硫氨酸盐0.1 mmol/L、β-烟酰胺腺嘌呤二核苷酸还原型0.2 mmol/L、三(2-羧乙基)磷氯化氢0.5mmol/L、α-酮戊二酸5.0 mmol/L、三羟甲基氨基甲烷50.0 mmol/L、Proclin-300质量分数为0.05%,即得;
(2)R2试剂的制备:称取重组同型半胱氨酸甲基转移酶、重组谷氨酸脱氢酶、重组S-腺苷同型半胱氨酸水解酶、重组腺苷脱氨酶、三羟甲基氨基甲烷、Proclin-300,依次加入去离子水中,搅拌溶解,定容至终浓度分别为重组同型半胱氨酸甲基转移酶5.0 KU/L、重组谷氨酸脱氢酶10.0 KU/L、重组S-腺苷同型半胱氨酸水解酶3.0 KU/L、重组腺苷脱氨酶5.0KU/L、三羟甲基氨基甲烷50.0 mmol/L、Proclin-300质量分数为0.05%,即得。
实施例七
本发明检测生物样本中同型半胱氨酸含量的试剂盒的使用方法,包括以下步骤:
在全自动生化分析仪中加入6个不同浓度的校准品,每个浓度13μL,实施例四制备的R1试剂240μL,混匀,37℃温育5.0分钟;然后加入实施例四制备的R2试剂65μL,混匀,使用340 nm主波长、405nm副波长进行检测,37℃恒温2.5分钟后,读取初始吸光度,连续监测2.5分钟的吸光度变化率,由生化分析仪自动计算得到校准曲线。
在全自动生化分析仪中加入待测质控样本13μL,实施例四制备的R1试剂240μL,混匀,37℃温育5.0分钟;然后加入实施例四制备的R2试剂65μL,混匀,使用340 nm主波长、405nm副波长进行检测,37℃恒温2.5分钟后,读取初始吸光度,连续监测2.5分钟的吸光度变化率,由生化分析仪自动计算待测样本浓度数值。
其中6个校准品中同型半胱氨酸浓度分别为:0.00,2.50,5.00,10.00,20.00,50.00 µmol/L;质控样本中同型半胱氨酸的浓度为15.00µmol/L,质控样本重复测定10次,检测结果详见表1。
实施例八
本发明检测生物样本中同型半胱氨酸含量的试剂盒的使用方法,包括以下步骤:
在全自动生化分析仪中加入6个不同浓度的校准品,每个浓度13μL,实施例五制备的R1试剂240μL,混匀,37℃温育5.0分钟;然后加入实施例五制备的R2试剂65μL,混匀,使用340 nm主波长、405nm副波长进行检测,37℃恒温2.5分钟后,读取初始吸光度,连续监测2.5分钟的吸光度变化率,由生化分析仪自动计算得到校准曲线。
在全自动生化分析仪中加入待测质控样本13μL,实施例五制备的R1试剂240μL,混匀,37℃温育5.0分钟;然后加入实施例五制备的R2试剂65μL,混匀,使用340 nm主波长、405nm副波长进行检测,37℃恒温2.5分钟后,读取初始吸光度,连续监测2.5分钟的吸光度变化率,由生化分析仪自动计算待测样本浓度数值。
其中6个校准品中同型半胱氨酸浓度分别为:0.00,2.50,5.00,10.00,20.00,50.00 µmol/L;质控样本中同型半胱氨酸的浓度为15.00µmol/L,质控样本重复测定10次,检测结果详见表1。
实施例九
本发明检测生物样本中同型半胱氨酸含量的试剂盒的使用方法,包括以下步骤:
在全自动生化分析仪中加入6个不同浓度的校准品,每个浓度13μL,实施例六制备的R1试剂240μL,混匀,37℃温育5.0分钟;然后加入实施例六制备的R2试剂65μL,混匀,使用340 nm主波长、405nm副波长进行检测,37℃恒温2.5分钟后,读取初始吸光度,连续监测2.5分钟的吸光度变化率,由生化分析仪自动计算得到校准曲线。
在全自动生化分析仪中加入待测质控样本13μL,实施例六制备的R1试剂240μL,混匀,37℃温育5.0分钟;然后加入实施例六制备的R2试剂65μL,混匀,使用340 nm主波长、405nm副波长进行检测,37℃恒温2.5分钟后,读取初始吸光度,连续监测2.5分钟的吸光度变化率,由生化分析仪自动计算待测样本浓度数值。
其中6个校准品中同型半胱氨酸浓度分别为:0.00,2.50,5.00,10.00,20.00,50.00 µmol/L;质控样本中同型半胱氨酸浓度为15.00µmol/L,质控样本重复测定10次,检测结果详见表1。
实施例十
将实施例六制备的试剂盒在室温(25℃)环境下密封避光储存2年后,重复上述实施例九的实验步骤,检测结果详见表1。
表1:质控样本检测结果及分析
试剂 | 实施例四制备 | 实施例五制备 | 实施例六制备 | 实施例六制备,储存2年后 |
质控样本浓度 (µmol/L) | 15.00 | 15.00 | 15.00 | 15.00 |
1 | 14.12 | 13.97 | 15.50 | 14.88 |
2 | 14.34 | 14.20 | 15.29 | 15.11 |
3 | 13.83 | 13.00 | 14.77 | 15.07 |
4 | 16.94 | 14.54 | 15.04 | 14.90 |
5 | 15.10 | 17.06 | 15.07 | 15.32 |
6 | 14.63 | 15.52 | 14.98 | 15.65 |
7 | 14.20 | 14.00 | 15.00 | 15.18 |
8 | 16.61 | 13.18 | 14.86 | 14.87 |
9 | 13.97 | 14.27 | 14.83 | 14.95 |
10 | 14.38 | 14.03 | 15.69 | 15.22 |
平均值(µmol/L) | 14.81 | 14.38 | 15.10 | 15.12 |
标准差(SD) | 1.10 | 1.17 | 0.30 | 0.24 |
精密度(CV) | 7.40% | 8.14% | 1.99% | 1.61% |
回收率 | 98.73% | 95.87% | 100.67% | 100.80% |
由表1可知,本发明实施例四、五、六中制备的检测生物样本中同型半胱氨酸含量的试剂盒均能准确测定质控样本中同型半胱氨酸的含量,检测结果的精密度与回收率均在可接受范围以内(CV≤10.00%、95.00%≤回收率≤105.00%),其中实施例六的方案为最佳选择,同时该试剂盒在适当条件下存储2年,试剂性能稳定。
需要说明的是,以上所述仅为本发明的实施例,并非因此限制本发明的专利范围,凡是利用本发明说明书内容所做的等效结构或等效流程变换,或直接或间接运用在其他相关技术领域,均同理包括在本发明的专利保护范围内。
序列表
<110> 苏州博源医疗科技有限公司
<120> 一种检测生物样本中同型半胱氨酸含量的试剂盒及其制备与使用方法
<130> 2020.12.31
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Claims (4)
1.一种检测生物样本中同型半胱氨酸含量的试剂盒,其特征在于:包括R1试剂与R2试剂两种彼此独立的试剂,其中,
所述R1试剂组成成分为:0.01~1.00mmol/L S-腺苷甲硫氨酸盐、0.02~2.00mmol/Lβ-烟酰胺腺嘌呤二核苷酸还原型、0.05~5.00mmol/L三(2-羧乙基)磷氯化氢、0.5~50.0mmol/Lα-酮戊二酸、5.0~500.0mmol/L三羟甲基氨基甲烷、质量分数为0.01~0.5%的防腐剂、溶剂为去离子水;
所述R2试剂组成成分为:0.5~50.0KU/L重组同型半胱氨酸甲基转移酶、1.0~100.0KU/L重组谷氨酸脱氢酶、0.3~30.0KU/L重组S-腺苷同型半胱氨酸水解酶、0.5~50.0KU/L重组腺苷脱氨酶、5.0~500.0mmol/L三羟甲基氨基甲烷、质量分数为0.01~0.5%的防腐剂、溶剂为去离子水;
所述防腐剂为Proclin-300;
所述重组同型半胱氨酸甲基转移酶的氨基酸序列如序列表SEQ ID NO:1所示,重组谷氨酸脱氢酶的氨基酸序列如序列表SEQ ID NO:2所示,重组S-腺苷同型半胱氨酸水解酶的氨基酸序列如序列表SEQ ID NO:3所示,重组腺苷脱氨酶的氨基酸序列如序列表SEQ IDNO:4所示。
2.根据权利要求1所述的检测生物样本中同型半胱氨酸含量的试剂盒,其特征在于:包括R1试剂与R2试剂两种彼此独立的试剂,其中,
所述R1试剂组成成分为:0.1mmol/L S-腺苷甲硫氨酸盐、0.2mmol/Lβ-烟酰胺腺嘌呤二核苷酸还原型、0.5mmol/L三(2-羧乙基)磷氯化氢、5.0mmol/Lα-酮戊二酸、50.0mmol/L三羟甲基氨基甲烷、质量分数为0.05%的Proclin-300、溶剂为去离子水;
所述R2试剂组成成分为:5.0KU/L重组同型半胱氨酸甲基转移酶、10.0KU/L重组谷氨酸脱氢酶、3.0KU/L重组S-腺苷同型半胱氨酸水解酶、5.0KU/L重组腺苷脱氨酶、50.0mmol/L三羟甲基氨基甲烷、质量分数为0.05%的Proclin-300、溶剂为去离子水。
3.一种如权利要求1所述的检测生物样本中同型半胱氨酸含量的试剂盒的制备方法,其特征在于:包括以下步骤:
(1)R1试剂的制备:称取S-腺苷甲硫氨酸盐、β-烟酰胺腺嘌呤二核苷酸还原型、三(2-羧乙基)磷氯化氢、α-酮戊二酸、三羟甲基氨基甲烷、防腐剂,依次加入去离子水中,搅拌溶解,定容至终浓度分别为S-腺苷甲硫氨酸盐0.01~1.00mmol/L、β-烟酰胺腺嘌呤二核苷酸还原型0.02~2.00mmol/L、三(2-羧乙基)磷氯化氢0.05~5.00mmol/L、α-酮戊二酸0.5~50.0mmol/L、三羟甲基氨基甲烷5.0~500.0mmol/L、防腐剂质量分数为0.01~0.5%,即得;
(2)R2试剂的制备:称取重组同型半胱氨酸甲基转移酶、重组谷氨酸脱氢酶、重组S-腺苷同型半胱氨酸水解酶、重组腺苷脱氨酶、三羟甲基氨基甲烷、防腐剂,依次加入去离子水中,搅拌溶解,定容至终浓度分别为重组同型半胱氨酸甲基转移酶0.5~50.0KU/L、重组谷氨酸脱氢酶1.0~100.0KU/L、重组S-腺苷同型半胱氨酸水解酶0.3~30.0KU/L、重组腺苷脱氨酶0.5~50.0KU/L、三羟甲基氨基甲烷5.0~500.0mmol/L、防腐剂质量分数为0.01~0.5%,即得;
所述防腐剂为Proclin-300;
所述重组同型半胱氨酸甲基转移酶的氨基酸序列如序列表SEQ ID NO:1所示,重组谷氨酸脱氢酶的氨基酸序列如序列表SEQ ID NO:2所示,重组S-腺苷同型半胱氨酸水解酶的氨基酸序列如序列表SEQ ID NO:3所示,重组腺苷脱氨酶的氨基酸序列如序列表SEQ IDNO:4所示。
4.根据权利要求3所述的检测生物样本中同型半胱氨酸含量的试剂盒的制备方法,其特征在于:包括以下步骤:
(1)R1试剂的制备:称取S-腺苷甲硫氨酸盐、β-烟酰胺腺嘌呤二核苷酸还原型、三(2-羧乙基)磷氯化氢、α-酮戊二酸、三羟甲基氨基甲烷、Proclin-300,依次加入去离子水中,搅拌溶解,定容至终浓度分别为S-腺苷甲硫氨酸盐0.1mmol/L、β-烟酰胺腺嘌呤二核苷酸还原型0.2mmol/L、三(2-羧乙基)磷氯化氢0.5mmol/L、α-酮戊二酸5.0mmol/L、三羟甲基氨基甲烷50.0mmol/L、Proclin-300质量分数为0.05%,即得;
(2)R2试剂的制备:称取重组同型半胱氨酸甲基转移酶、重组谷氨酸脱氢酶、重组S-腺苷同型半胱氨酸水解酶、重组腺苷脱氨酶、三羟甲基氨基甲烷、Proclin-300,依次加入去离子水中,搅拌溶解,定容至终浓度分别为重组同型半胱氨酸甲基转移酶5.0KU/L、重组谷氨酸脱氢酶10.0KU/L、重组S-腺苷同型半胱氨酸水解酶3.0KU/L、重组腺苷脱氨酶5.0KU/L、三羟甲基氨基甲烷50.0mmol/L、Proclin-300质量分数为0.05%,即得。
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