Rapid cell-surface prion protein conversion revealed using a novel cell system.

Rapid cell-surface prion protein conversion revealed using a novel cell system.
复制标题

DOI:
10.1038/ncomms1282
复制
发表时间:
2011
影响因子:
16.6
通讯作者:
Tabrizi, S. J.
Tabrizi, S. J.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Goold, R.;Rabbanian, S.;Sutton, L.;Andre, R.;Arora, P.;Moonga, J.;Clarke, A. R.;Schiavo, G.;Jat, P.;Collinge, J.;Tabrizi, S. J.

文献摘要

参考文献

被引文献

相似文献

朊病毒病是一种致命的神经退行性疾病,具有独特的传播特性。感染和病理因素被认为是朊病毒蛋白质的错误折叠构象。由于感染性朊病毒的来源在免疫学上与正常细胞朊病毒蛋白(PrPC)无法区分,因此对朊病毒感染的初始事件知之甚少。在这里,我们开发了一个独特的细胞系统,其中表位标记的PrPC在PrP敲低(KD)神经母细胞瘤细胞系中表达。当在我们的PrP-KD细胞中表达时,标记的PrPC支持朊病毒复制,产生真正的表位标记的感染性错误折叠的PrP(PrPSc)。使用这种表位标记的PrPSc,我们研究了细胞朊病毒感染和PrP错误折叠的最早事件。我们表明,朊病毒感染的细胞是非常迅速的1分钟内发生朊病毒暴露,我们证明了质膜是朊病毒转换的主要网站。朊病毒疾病的研究一直受到阻碍,因为没有方法来区分新形成的异常朊病毒蛋白构象。在这里,作者描述了一种研究新形成的异常朊病毒蛋白的方法,并证明它是在细胞暴露于朊病毒1分钟内产生的。
Prion diseases are fatal neurodegenerative disorders with unique transmissible properties. The infectious and pathological agent is thought to be a misfolded conformer of the prion protein. Little is known about the initial events in prion infection because the infecting prion source has been immunologically indistinguishable from normal cellular prion protein (PrPC). Here we develop a unique cell system in which epitope-tagged PrPC is expressed in a PrP knockdown (KD) neuroblastoma cell line. The tagged PrPC, when expressed in our PrP-KD cells, supports prion replication with the production of bona fide epitope-tagged infectious misfolded PrP (PrPSc). Using this epitope-tagged PrPSc, we study the earliest events in cellular prion infection and PrP misfolding. We show that prion infection of cells is extremely rapid occurring within 1 min of prion exposure, and we demonstrate that the plasma membrane is the primary site of prion conversion. The study of prion diseases has been hampered as there is no method to distinguish newly formed abnormal prion protein conformers. Here, the authors describe a method to study newly formed abnormal prion protein and demonstrate that it is produced within 1 minute of cell exposure to prions.
DOI: 10.1073/pnas.1004036107
发表时间: 2010-08-10
影响因子: 11.1
作者:
Edgeworth, Julie A.;Gros, Nathalie;Collinge, John
通讯作者: Collinge, John
DOI: 10.1128/jvi.74.9.4377-4386.2000
发表时间: 2000-05-01
影响因子: 5.4
作者:
Bosque, PJ;Prusiner, SB
通讯作者: Prusiner, SB
DOI: 10.1128/jvi.62.5.1558-1564.1988
发表时间: 1988-05-01
影响因子: 5.4
作者:
BUTLER, DA;SCOTT, MRD;PRUSINER, SB
通讯作者: PRUSINER, SB
DOI: 10.1074/jbc.m205110200
发表时间: 2002-10-11
影响因子: 4.8
作者:
Béranger, F;Mangé, A;Lehmann, S
通讯作者: Lehmann, S
DOI: 10.1073/pnas.0702662104
发表时间: 2007-06-05
影响因子: 11.1
作者:
Deleault, Nathan R.;Harris, Brent T.;Supattapone, Surachai
通讯作者: Supattapone, Surachai