Altered expression of type 1 inositol 1,4,5-trisphosphate receptor in the Ngsk Prnp deficient mice. 2010

H P Lee, and J K Choi, and H Y Shin, and Y C Jeon, and B H Jeong, and H G Lee, and J I Kim, and E K Choi, and R I Carp, and Y S Kim
Ilsong Institute of Life Science, Hallym University, Anyang, Dongan-gu, Gyeonggi-Do, Republic of Korea.

Doppel protein (Dpl) is a paralog of the cellular form of prion protein (PrP(C)). Its ectopic expression in the CNS elicits significant cerebellar Purkinje cell degeneration in some lines of PrP knockout mice. However, little is known about the Dpl-mediated neurodegenerative mechanism. To understand the molecular and intracellular pathways underlying Purkinje cell degeneration, here, we investigated the regulation of calcium-release channel protein, type 1 inositol 1,4,5-trisphosphate receptor (IP(3)R1) gene in Ngsk mice. These knockout mice express high levels of Dpl and eventually develop cerebellar degeneration. We observed that the expression level of IP(3)R1 gene is reduced in the cerebella of Ngsk mice as early as 3 months of age compared with age-matched controls along with the reduction in DNA binding activity of nuclear factor of activated-T cells (NFAT) which is transcription factor of IP(3)R1. Notably, expression of PrP restored the reduced DNA binding activity of NFATc4 by Dpl. Reduced expressions of brain-derived neurotrophic factor (BDNF) and ionotropic glutamate receptor subtype 2 or B (GluR2), which are regulated by NFATc4, were also restored by PrP expression. In light of these findings, we suggest a mechanism for Dpl-mediated Purkinje cell degeneration linked to reduced gene expression of proteins related to neuronal activity. Decrease in IP(3)R1 gene expression may lead to functional deficits and ultimately death of Purkinje cells in Ngsk mice.

UI MeSH Term Description Entries
D009410 Nerve Degeneration Loss of functional activity and trophic degeneration of nerve axons and their terminal arborizations following the destruction of their cells of origin or interruption of their continuity with these cells. The pathology is characteristic of neurodegenerative diseases. Often the process of nerve degeneration is studied in research on neuroanatomical localization and correlation of the neurophysiology of neural pathways. Neuron Degeneration,Degeneration, Nerve,Degeneration, Neuron,Degenerations, Nerve,Degenerations, Neuron,Nerve Degenerations,Neuron Degenerations
D011328 Prions Small proteinaceous infectious particles which resist inactivation by procedures that modify NUCLEIC ACIDS and contain an abnormal isoform of a cellular protein which is a major and necessary component. The abnormal (scrapie) isoform is PrPSc (PRPSC PROTEINS) and the cellular isoform PrPC (PRPC PROTEINS). The primary amino acid sequence of the two isoforms is identical. Human diseases caused by prions include CREUTZFELDT-JAKOB SYNDROME; GERSTMANN-STRAUSSLER SYNDROME; and INSOMNIA, FATAL FAMILIAL. Mink Encephalopathy Virus,Prion,Encephalopathy Virus, Mink
D011689 Purkinje Cells The output neurons of the cerebellar cortex. Purkinje Cell,Purkinje Neuron,Purkyne Cell,Cell, Purkinje,Cell, Purkyne,Cells, Purkinje,Cells, Purkyne,Neuron, Purkinje,Neurons, Purkinje,Purkinje Neurons,Purkyne Cells
D002526 Cerebellar Diseases Diseases that affect the structure or function of the cerebellum. Cardinal manifestations of cerebellar dysfunction include dysmetria, GAIT ATAXIA, and MUSCLE HYPOTONIA. Cerebellar Dysfunction,Cerebellum Diseases,Cerebellar Disorders,Cerebellar Syndromes,Cerebellar Disease,Cerebellar Disorder,Cerebellar Dysfunctions,Cerebellar Syndrome,Cerebellum Disease,Disease, Cerebellar,Disease, Cerebellum,Disorder, Cerebellar,Dysfunction, Cerebellar,Syndrome, Cerebellar
D004195 Disease Models, Animal Naturally-occurring or experimentally-induced animal diseases with pathological processes analogous to human diseases. Animal Disease Model,Animal Disease Models,Disease Model, Animal
D005786 Gene Expression Regulation Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control (induction or repression) of gene action at the level of transcription or translation. Gene Action Regulation,Regulation of Gene Expression,Expression Regulation, Gene,Regulation, Gene Action,Regulation, Gene Expression
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D015536 Down-Regulation A negative regulatory effect on physiological processes at the molecular, cellular, or systemic level. At the molecular level, the major regulatory sites include membrane receptors, genes (GENE EXPRESSION REGULATION), mRNAs (RNA, MESSENGER), and proteins. Receptor Down-Regulation,Down-Regulation (Physiology),Downregulation,Down Regulation,Down-Regulation, Receptor
D050778 NFATC Transcription Factors A family of transcription factors characterized by the presence of highly conserved calcineurin- and DNA-binding domains. NFAT proteins are activated in the CYTOPLASM by the calcium-dependent phosphatase CALCINEURIN. They transduce calcium signals to the nucleus where they can interact with TRANSCRIPTION FACTOR AP-1 or NF-KAPPA B and initiate GENETIC TRANSCRIPTION of GENES involved in CELL DIFFERENTIATION and development. NFAT proteins stimulate T-CELL activation through the induction of IMMEDIATE-EARLY GENES such as INTERLEUKIN-2. NFAT Transcription Factor 1,NFAT Transcription Factor 2,NFAT Transcription Factor 3,NFAT Transcription Factor 4,NFAT Transcription Factor 5,Nuclear Factors of Activated T-Cells,NF-AT Proteins,NF-AT3 Protein,NF-AT4 Protein,NF-ATc1 Protein,NFAT Proteins,NFAT-1 Protein,NFAT-2 Protein,NFAT1 Protein,NFAT2 Protein,NFAT3 Protein,NFAT4 Protein,NFAT5 Protein,NFATC Proteins,NFATC1 Protein,NFATC1 Transcription Factor,NFATC2 Protein,NFATC2 Transcription Factor,NFATC3 Protein,NFATC3 Transcription Factor,NFATC4 Protein,NFATC4 Transcription Factor,NFATL1 Protein,NFATx Protein,NFATz Protein,Nuclear Factor of Activated T-Cells 5 Protein,Nuclear Factor of Activated T-Cells, Cytoplasmic,Nuclear Factor of Activated T-Cells, Cytoplasmic 1 Protein,Nuclear Factor of Activated T-Cells, Cytoplasmic 2 Protein,Nuclear Factor of Activated T-Cells, Cytoplasmic 3 Protein,Nuclear Factor of Activated T-Cells, Cytoplasmic 4 Protein,OREBP Protein,Osmotic Response Element Binding Protein,TonEBP Protein,Tonicity-Responsive Enhancer-Binding Protein,Transcription Factor NF-AT,Factor, NFATC1 Transcription,Factor, NFATC2 Transcription,Factor, NFATC3 Transcription,NF AT Proteins,NF AT3 Protein,NF AT4 Protein,NF ATc1 Protein,NF-AT, Transcription Factor,NFAT 1 Protein,NFAT 2 Protein,Nuclear Factor of Activated T Cells 5 Protein,Nuclear Factor of Activated T Cells, Cytoplasmic,Nuclear Factor of Activated T Cells, Cytoplasmic 1 Protein,Nuclear Factor of Activated T Cells, Cytoplasmic 2 Protein,Nuclear Factor of Activated T Cells, Cytoplasmic 3 Protein,Nuclear Factor of Activated T Cells, Cytoplasmic 4 Protein,Nuclear Factors of Activated T Cells,Tonicity Responsive Enhancer Binding Protein,Transcription Factor NF AT,Transcription Factor, NFATC1,Transcription Factor, NFATC2,Transcription Factor, NFATC3,Transcription Factor, NFATC4,Transcription Factors, NFATC
D051379 Mice The common name for the genus Mus. Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus

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