Análises de redes modulares de co-expressão gênica revelam vias importantes na doença de Alzheimer e paralisia supranuclear progressiva
type: CreativeWork
description: The incidence of neurodegenerative diseases leading to impairment of cognitive functions and dementia have increased in recent years, mainly because of enhanced longevity in the population worldwide. Understanding the onset and progression of these pathologies can help to develop preventive and disease-modifying treatments for these diseases. In this work, using RNA-seq data obtained from two brain regions (temporal cortex and cerebellum) of human patients diagnosed with neurodegenerative diseases (Alzheimer or Progressive Supranuclear Palsy) and two animal models, 5XFAD of amyloidopathy and TauD35 of tauopathy, we performed an integrative analysis at the gene/transcript level combined with a co-expression analysis to identify similarities and discrepancies in the biological processes affected by these two diseases. So that we could compare the different data, we used the only common variable in all datasets: age of death. Thus, we divided the human data into 3 groups: A (70-80), B (81-89) and C (90+); and animals in groups of 4 months, 12 months, 17 months and 18 months. The results of the transcriptional analysis showed that gene expression alterations associated with immune-inflammatory alterations are present in AD only in the temporal cortex and not in the cerebellum, and that alteration related to synaptic transmission occurs late (groups B and C), and are found only when we use genes with isoform switches in the analysis of functional enrichment in conjunction with differentially expressed genes. In PSP, all changes associated with immune-inflammatory responses and synaptic transmission are found exclusively in temporal cortex data; however, all changes are specific for group A. In animal models, changes in 5XFAD are similar to those found in AD human brains, with gene expression alterations associated with the immune-inflammatory response present early (4 months) and synaptic terms only at late pathological stages (18 months). In TauD35 mice, this pattern is…
abstract: The incidence of neurodegenerative diseases leading to impairment of cognitive functions and dementia have increased in recent years, mainly because of enhanced longevity in the population worldwide. Understanding the onset and progression of these pathologies can help to develop preventive and disease-modifying treatments for these diseases. In this work, using RNA-seq data obtained from two brain regions (temporal cortex and cerebellum) of human patients diagnosed with neurodegenerative diseases (Alzheimer or Progressive Supranuclear Palsy) and two animal models, 5XFAD of amyloidopathy and TauD35 of tauopathy, we performed an integrative analysis at the gene/transcript level combined with a co-expression analysis to identify similarities and discrepancies in the biological processes affected by these two diseases. So that we could compare the different data, we used the only common variable in all datasets: age of death. Thus, we divided the human data into 3 groups: A (70-80), B (81-89) and C (90+); and animals in groups of 4 months, 12 months, 17 months and 18 months. The results of the transcriptional analysis showed that gene expression alterations associated with immune-inflammatory alterations are present in AD only in the temporal cortex and not in the cerebellum, and that alteration related to synaptic transmission occurs late (groups B and C), and are found only when we use genes with isoform switches in the analysis of functional enrichment in conjunction with differentially expressed genes. In PSP, all changes associated with immune-inflammatory responses and synaptic transmission are found exclusively in temporal cortex data; however, all changes are specific for group A. In animal models, changes in 5XFAD are similar to those found in AD human brains, with gene expression alterations associated with the immune-inflammatory response present early (4 months) and synaptic terms only at late pathological stages (18 months). In TauD35 mice, this pattern is…
author: Carvalho, Lukas Iohan da Cruz
language: pt_BR
keywords: Doença de Alzheimer (AD), Paralisia supranuclear progressiva (PSP), 5XFAD, TauD35, Módulos
date published: 2021-09-28
date modified: 2026-07-24T01:20:54Z
provider: Brazil UFRN
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Universidade Federal do Rio Grande do Norte