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Altered Machinery of Protein Synthesis in Alzheimer's: From the Nucleolus to the Ribosome

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Hernandez Ortega, Karina & Garcia Esparcia, Paula & Gil Alberdi, Laura & Lucas, Jose J. & Ferrer, Isidre .Altered Machinery of Protein Synthesis in Alzheimer's: From the Nucleolus to the Ribosome.

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Hernandez Ortega, Karina & Garcia Esparcia, Paula & Gil Alberdi, Laura & Lucas, Jose J. & Ferrer, Isidre. Altered Machinery of Protein Synthesis in Alzheimer's: From the Nucleolus to the Ribosome.

https://hdl.handle.net/20.500.12080/25963
dc.contributor.author Hernandez Ortega, Karina
dc.contributor.author Garcia Esparcia, Paula
dc.contributor.author Gil Alberdi, Laura
dc.contributor.author Lucas, Jose J.
dc.contributor.author Ferrer, Isidre
dc.date.accessioned 2021-10-25T16:55:50Z
dc.date.available 2021-10-25T16:55:50Z
dc.identifier.uri https://hdl.handle.net/20.500.12080/25963
dc.description.abstract Ribosomes and protein synthesis have been reported to be altered in the cerebral cortex at advanced stages of Alzheimer¿s disease (AD). Modifications in the hippocampus with disease progression have not been assessed. Sixty-seven cases including middle-aged (MA) and AD stages I¿VI were analyzed. Nucleolar chaperones nucleolin, nucleophosmin and nucleoplasmin 3, and upstream binding transcription factor RNA polymerase I gene (UBTF) mRNAs are abnormally regulated and their protein levels reduced in AD. Histone modifications dimethylated histone H3K9 (H3K9me2) and acetylated histone H3K12 (H3K12ac) are decreased in CA1. Nuclear tau declines in CA1 and dentate gyrus (DG), and practically disappears in neurons with neurofibrillary tangles. Subunit 28 ribosomal RNA (28S rRNA) expression is altered in CA1 and DG in AD. Several genes encoding ribosomal proteins are abnormally regulated and protein levels of translation initiation factors eIF2a, eIF3h and eIF5, and elongation factor eEF2, are altered in the CA1 region in AD. These findings show alterations in the protein synthesis machinery in AD involving the nucleolus, nucleus and ribosomes in the hippocampus in AD some of them starting at first stages (I¿II) preceding neuron loss. These changes may lie behind reduced numbers of dendritic branches and reduced synapses of CA1 and DG neurons which cause hippocampal atrophy es_ES
dc.format application/pdf es_ES
dc.language eng es_ES
dc.rights CC-BY es_ES
dc.rights.uri http://creativecommons.org/licenses/by/4.0/deed.es es_ES
dc.subject Alzheimer¿s disease, elongation factors of pro tein synthesis, histones, initiation factors, nuclear tau, nucleolin, nucleolus, nucleophos min, nucleoplasmin, nucleus, protein synthe sis, ribosome, ribosomal proteins, upstream binding transcription factor RNA polymerase I. es_ES
dc.title Altered Machinery of Protein Synthesis in Alzheimer's: From the Nucleolus to the Ribosome es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.rights.accessrights info:eu-repo/semantics/openAccess es_ES
dc.identifier.location N/A es_ES


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