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Transmission characteristics of heterozygous cases of Creutzfeldt-Jakob disease with variable abnormal prion protein allotypes.
Acta Neuropathologica Communications ( IF 6.2 ) Pub Date : 2020-06-09 , DOI: 10.1186/s40478-020-00958-x
Anne Ward 1 , Jason R Hollister 1 , Kristin McNally 2 , Diane L Ritchie 3 , Gianluigi Zanusso 4 , Suzette A Priola 1
Affiliation  

In the human prion disease Creutzfeldt-Jakob disease (CJD), different CJD neuropathological subtypes are defined by the presence in normal prion protein (PrPC) of a methionine or valine at residue 129, by the molecular mass of the infectious prion protein PrPSc, by the pattern of PrPSc deposition, and by the distribution of spongiform change in the brain. Heterozygous cases of CJD potentially add another layer of complexity to defining CJD subtypes since PrPSc can have either a methionine (PrPSc-M129) or valine (PrPSc-V129) at residue 129. We have recently demonstrated that the relative amount of PrPSc-M129 versus PrPSc-V129, i.e. the PrPSc allotype ratio, varies between heterozygous CJD cases. In order to determine if differences in PrPSc allotype correlated with different disease phenotypes, we have inoculated 10 cases of heterozygous CJD (7 sporadic and 3 iatrogenic) into two transgenic mouse lines overexpressing PrPC with a methionine at codon 129. In one case, brain-region specific differences in PrPSc allotype appeared to correlate with differences in prion disease transmission and phenotype. In the other 9 cases inoculated, the presence of PrPSc-V129 was associated with plaque formation but differences in PrPSc allotype did not consistently correlate with disease incubation time or neuropathology. Thus, while the PrPSc allotype ratio may contribute to diverse prion phenotypes within a single brain, it does not appear to be a primary determinative factor of disease phenotype.

中文翻译:

可变abnormal病毒蛋白同种异型的克雅氏病杂合子病例的传播特征。

在人类pr病毒病Creutzfeldt-Jakob病(CJD)中,不同的CJD神经病理亚型是由正常病毒蛋白(PrPC)中第129位残基的甲硫氨酸或缬氨酸的存在,传染性病毒蛋白PrPSc的分子量, PrPSc沉积的模式,以及通过海绵状分布在大脑中的分布。由于PrPSc在残基129上可以有蛋氨酸(PrPSc-M129)或缬氨酸(PrPSc-V129),因此杂合子病例的CJD可能会给定义CJD亚型增加另一层复杂性。我们最近证明了PrPSc-M129与PrPSc-V129,即PrPSc的同种异体比率,在杂合CJD病例之间有所不同。为了确定PrPSc同种异型的差异是否与不同的疾病表型相关,我们已经将10例杂合CJD(7例散发和3例医源性)接种到了两个高表达PrPC的第129位密码子上的甲硫氨酸转基因小鼠系中。在一种情况下,PrPSc同种异型的脑区特异性差异似乎与病毒疾病传播的差异相关和表型。在其他9例接种的病例中,PrPSc-V129的存在与斑块形成有关,但PrPSc同种异型的差异并不始终与疾病潜伏期或神经病理学相关。因此,尽管PrPSc同种异型比可能在单个大脑中导致多种diverse病毒表型,但它似乎并不是疾病表型的主要决定因素。PrPSc同种异型的大脑区域特定差异似乎与病毒疾病传播和表型的差异相关。在其他9例接种的病例中,PrPSc-V129的存在与斑块形成有关,但PrPSc同种异型的差异并不始终与疾病潜伏期或神经病理学相关。因此,尽管PrPSc同种异型比可能在单个大脑中导致多种diverse病毒表型,但它似乎并不是疾病表型的主要决定因素。PrPSc同种异型的大脑区域特定差异似乎与病毒疾病传播和表型的差异相关。在其他9例接种的病例中,PrPSc-V129的存在与斑块形成有关,但PrPSc同种异型的差异并不始终与疾病潜伏期或神经病理学相关。因此,尽管PrPSc同种异型比可能在单个大脑中导致多种diverse病毒表型,但它似乎并不是疾病表型的主要决定因素。
更新日期:2020-06-09
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