J Hepatol:Autotaxin可用于妊娠期肝内胆汁淤积症(ICP)诊断

2015-04-21 MedSci MedSci原创

Autotaxin(ATX)是分泌型糖蛋白,具有磷酸二酯酶(PDE)活性,是胞外焦磷酸酶/磷酸二酯酶(ENPP)家族的一员。ATX还具有溶血磷脂酶D(lysoPLD)活性,能够以溶血磷脂酰胆碱(LPC)为底物催化生成溶血磷脂酸(LPA)。妊娠期肝内胆汁淤积症(ICP)是妊娠中、晚期特有的并发症,临床上以皮肤瘙痒和胆汁酸升高为特征,主要危害胎儿,使围生儿发病率和死亡率增高。该病对妊娠最大的危害是发生

Autotaxin(ATX)是分泌型糖蛋白,具有磷酸二酯酶(PDE)活性,是胞外焦磷酸酶/磷酸二酯酶(ENPP)家族的一员。ATX还具有溶血磷脂酶D(lysoPLD)活性,能够以溶血磷脂酰胆碱(LPC)为底物催化生成溶血磷脂酸(LPA)。

妊娠期肝内胆汁淤积症(ICP)是妊娠中、晚期特有的并发症,临床上以皮肤瘙痒和胆汁酸升高为特征,主要危害胎儿,使围生儿发病率和死亡率增高。该病对妊娠最大的危害是发生难以预测的胎儿突然死亡,该风险与病情程度相关。

Kremer AE等人进行了一项研究,探究能否通过孕妇血清Autotaxin(ATX)含量对妊娠期肝内胆汁淤积症(ICP)进行高精确度的诊断。

该研究收集了44名不伴妊娠并发症、105名伴皮肤瘙痒孕妇(55名ICP、33其他原因引起的皮肤瘙痒、17名子痫前期/HELLP综合症)的血样和胎盘组织,通过Western印迹检测血清Autotaxin含量,使用定量PCR检测Autotaxin基因表达情况。

研究结果表明,ICP孕妇(mean±SD: 43.5±18.2nmolml(-1)min(-1), p<0.0001)较其他皮肤瘙痒孕妇(16.8±6.7nmolml(-1)min(-1))、子痫前期/HELLP综合症孕妇(16.8±8.9nmolml(-1)min(-1))、以及对照组(19.6±5.7nmolml(-1)min(-1)) 其血清Autotaxin增加。纵向分析法表明,孕期血清Autotaxin含量的增加与ICP相关的皮肤瘙痒的发生有关。孕妇血清Autotaxin增加并不会导致胎盘Autotaxin mRNA的增加。当阈值为27.0nmolml(-1)min(-1)时,血清Autotaxin含量对ICP的诊断(区分其他皮肤瘙痒、子痫前期、HELLP综合症)有很好的灵敏度和特异性。血清Autotaxin没有昼夜节律变化,也不会因为摄取食物而变化。

研究结果表明,孕妇血清Autotaxin的增加对ICP的诊断具有高度的灵敏度和特异性,并且可以区分ICP和其他妊娠期皮肤瘙痒,以及妊娠相关肝脏疾病。虽然妊娠本身以及口服避孕药会导致血清Autotaxin的增加,但是相比ICP,那只是很小的程度的增加。

原始出处:

Kremer AE, Bolier R, Dixon PH, Geenes V, Chambers J, Tolenaars D, Ris-Stalpers C, Kaess BM, Rust C, van der Post JA et al: Autotaxin activity has a high accuracy to diagnose intrahepatic cholestasis of pregnancy. Journal of hepatology 2015, 62(4):897-904.

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    2015-04-23 gwc384
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