Unknown,Transcriptomics,Genomics,Proteomics

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Expression data from the brain of cynomolgus macaques upon intrastriatal administration of baculoviral vectors

ABSTRACT: Recombinant insect baculoviral vectors efficiently transduce several types of cells in the brain and can possibly be used for gene therapy for brain disorders. To verify the suitability of using these viral vectors to develop gene therapy strategies in the brain, we evaluated immune reactions upon acute administration of baculoviral vectors into the brain of the cynomolgus macaque using microarray global gene expression profiling. Adult male cynomolgus macaques (Macaca fascicularis) were administered with baculovirus BV-HSVtk purified by membrane chromatography + high-speed centrifugation (MC+HS) into the brain.

ORGANISM(S): Macaca fascicularis

SUBMITTER: Timothy Kwang

PROVIDER: E-GEOD-75264 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Background: Prion diseases such as bovine spongiform encephalopathies (BSE) are transmissible neurodegenerative diseases which are presumably caused by an infectious conformational isoform of the cellular prion protein. Previous work has provided evidence that in murine prion disease the endogenous retrovirus (ERV) expression is altered in the brain. To determine if prion-induced changes in ERV expression are a general phenomenon we used a non-human primate model for prion disease. Results: Cynomolgus macaques (Macaca fasicularis) were infected intracerebrally with BSE-positive brain stem material from cattle and allowed to develop prion disease. Brain tissue from the basis pontis and vermis cerebelli of the six animals and the same regions from four healthy controls were subjected to ERV expression profiling using a retrovirus-specific microarray and quantitative real-time PCR. We could show that Class I gammaretroviruses HERV-E4-1, ERV-9, and MacERV-4 increase expression in BSE-infected macaques. In a second approach, we analysed ERV-K-(HML-2) RNA and protein expression in extracts from the same cynomolgus macaques. Here we found a significant downregulation of both, the macaque ERV-K-(HML-2) Gag protein and RNA in the frontal/parietal cortex of BSE-infected macaques. Conclusions: We provide evidence that dysregulation of ERVs in response to BSE-infection can be detected on both, the RNA and the protein level. To our knowledge, this is the first report on the differential expression of ERV-derived structural proteins in prion disorders. Our findings suggest that endogenous retroviruses may induce or exacerbate the pathological consequences of prion-associated neurodegeneration. Cynomolgus macaques (Macaca fasicularis) were infected intracerebrally with BSE-positive brain stem material from cattle and allowed to develop prion disease. Brain tissue from the basis pontis and vermis cerebelli of the six animals and the same regions from four healthy controls were subjected to ERV expression profiling using a retrovirus-specific microarray and quantitative real-time PCR. In a second approach, ERV-K-(HML-2) RNA and protein expression was analysed in extracts from the same cynomolgus macaques.

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Expression data from the brain of cynomolgus macaques upon intrastriatal administration of baculoviral vectors

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