相位对比法磁共振血管造影在诊断颅内静脉窦病变中的应用

摘要

Objective To clone and express human neuron-specific enolase (HuNSE) protein and prepare NSE-specific antibody for prion disease diagnosis. Methods HuNSE gene was amplified by RT-PCR and subcloned into a HIS-tagged expression vector pQE30 after sequence verification. HIS-NSE fusion protein expression was obtained in E. Coli M15 after IPTG induction followed by purification of the fusion protein by Ni-NTA affinity chromatography. Two male rabbits were immunized for 4 times with the purified protein, and the antiserum against NSE protein was collected and evaluated by enzyme-linked immunosorbent assay (ELISA), Western blotting and immunohischemistry. Results SDS-PAGE assay yielded an approximately 22 kD HIS-NSE fusion protein. The prepared antiserum could recognize both recombinant NSE protein and native NSE protein extracted from the brain tissues of different mammalian species as shown by Western blotting and immunohischemistry. Conclusion High expression of HuNSE is obtained in E. Coli and the prepared antiserum against HuNSE can be used potentially for diagnosis ofprion-associated diseases and other nervous degeneration diseases.%目的 探讨磁共振血管造影(MRA)的相位对比法(PC)在颅内静脉窦病变的表现及诊断价值.方法 颅内静脉窦病变52例,包括硬膜静脉窦血管畸形21例、硬膜动静脉瘘7例[其中6例为颈内动脉海绵窦瘘(CCF)]、静脉窦血检5例、脑膜瘤侵犯静脉窦19例.MR检查用Siemens公司1.5T扫描仪.扫描序列用PC和时间飞逝(TOF)两种方法.其中28例同时行DSA血管造影.结果 PC显示21例硬膜静脉窦血管畸形的瘤巢、输入动脉、输出静脉及静脉窦均为高信号,但瘤巢信号不均匀.PC和TOF两种方法对其输入动脉显示率均为95.2%(20/21),而对输出静脉显示率90.5%(19/21)及76.2%(16/21).6例CCF表现为患侧海绵窦扩张,眼上静脉增粗.4例横窦和1例上矢状窦的静脉窦血栓PC表现为窦内信号消失,MRI表现为静脉窦内高信号,还可伴有脑叶出血及水肿.19例脑膜瘤侵犯静脉窦,PC显示为静脉窦移位、狭窄及闭塞.结论 MRAPC能很好地显示静脉窦结构及其病变.