Detection of prion protein mRNA in normal and scrapie-infected tissues and cell lines.

Detection of prion protein mRNA in normal and scrapie-infected tissues and cell lines.
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检测正常和痒病感染的组织和细胞系中的朊病毒蛋白 mRNA。

DOI:
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发表时间:
1988
影响因子:
3.8
通讯作者:
Bruce Chesebro
Bruce Chesebro
中科院分区:
医学3区
文献类型:
--
作者:
Byron Caughey;Richard E. Race;Bruce Chesebro

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朊蛋白(PrP)形成从瘙痒病感染的大脑中分离出来的原纤维或朊蛋白棒,并被认为是这种缓慢进展的海绵状脑病的主要感染因子。在先前的Northern blot分析中,在正常和瘙痒病感染的大脑中都发现了prp特异性mrna,但在脾脏中没有发现,脾脏是一个具有大强度传染性的器官。本研究利用小鼠PrP DNA在各种组织和细胞中检测PrP mRNA。对小鼠和仓鼠脾脏的重新检查显示,它们含有低水平的PrP mRNA(约。脑组织mRNA含量的0.8%)。正常组织和痒病感染组织之间没有一致的差异。在严格的杂交条件下,小鼠上皮细胞、神经母细胞瘤、红细胞、b淋巴细胞和胚胎成纤维细胞组织培养细胞系、仓鼠卵巢细胞系、大鼠胶质瘤细胞系以及人T淋巴细胞和神经母细胞瘤细胞系的PrP mRNA也呈阳性。相比之下,两种小鼠骨髓细胞系和一种T细胞淋巴瘤未检测到PrP mRNA。这些结果提供了证据,证明PrP是一种蛋白质,除大脑细胞外,它是许多细胞(但不是所有细胞)共同的蛋白质。
Prion protein (PrP) forms the fibrils or prion rods isolated from scrapie-infected brain and has been proposed as the major component of the infectious agent of this slowly progressive spongiform encephalopathy. In previous Northern blot analyses PrP-specific mRNAs have been found in both normal and scrapie-infected brains but not in spleen, an organ which harbours large titres of infectivity. In the present study, mouse PrP DNA was used to probe for PrP mRNA in assorted tissues and cells. A reexamination of mouse and hamster spleens revealed that they contained low levels of PrP mRNA (approx. 0.8% of that in brain mRNA). No consistent differences were observed between normal and scrapie-infected tissues. Also positive for PrP mRNA under stringent hybridization conditions were mouse epithelial, neuroblastoma, erythroid, B-lymphocytic and embryo fibroblast tissue culture cell lines, a hamster ovary cell line, a rat glioma cell line, and human T lymphocytic and neuroblastoma cell lines. In contrast, no PrP mRNA was detected in two mouse myeloid cell lines and one T cell lymphoma. These results provide evidence that PrP is a protein common to numerous, but not all, cell types besides those of the brain.
编码朊病毒蛋白前导肽的 cDNA 克隆的分离以及同源基因在各种组织中的表达。
DOI: 10.1073/pnas.83.17.6377
发表时间: 1986
影响因子: 11.1
作者:
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发表时间: 1982-01-01
期刊: BIOCHEMISTRY
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DOI: 10.1073/pnas.82.12.4263
发表时间: 1985
影响因子: 11.1
作者:
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通讯作者: Manuelidis,EE
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发表时间: 1982-01-01
期刊: SCIENCE
影响因子: 56.9
作者:
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通讯作者: PRUSINER, SB
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发表时间: 1986-07-18
期刊: SCIENCE
影响因子: 56.9
作者:
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通讯作者: SMUCKLER, EA