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Master's Dissertation
DOI
https://doi.org/10.11606/D.87.2019.tde-15052020-152022
Document
Author
Full name
Adauto de Souza Spindola Júnior
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2019
Supervisor
Committee
Sogayar, Mari Cleide (President)
Pasquale, Roberto de
Porcionatto, Marimelia Aparecida
Ulrich, Alexander Henning
Title in Portuguese
Análise do perfil de expressão metaloproteinases (MMPs) e seus inibidores, Timp e Reck, em modelo animal de Doença de Parkinson
Keywords in Portuguese
dinâmica da matriz extracelular
Doença de Parkinson
Mmp-7
Mmp-9
Privação de sono
Reck
Abstract in Portuguese
A Doença de Parkinson (DP) é a a segunda doença neurodegenerativa mais comum no mundo. Dentro dos sintomas não-motores, desordens do sono são extremamente comuns e tem sido relacionado com perturbações cognitivas e da memória. O microambiente celular, em particular a Matriz Extracelular (MEC), está profundamente envolvida no processo de consolidação da memória assim como em processos neuropatológicos, como neuroinflamação, danos na barreira hematoencefálica e morte celular. Para melhor entendimento das dinâmicas da MEC nos distúrbios de memória que ocorrem na DP, o presente estudo investiga as expressões orquestradas das Mmps (Mmp-3, Mmp-7 e Mmp-9), e seus moduladores (Reck e Timp-3) em modelo animal de DP induzido por rotenona, onde foi adicionada uma intervenção no processo de memória por introdução da privação do sono REM (PSREM). Adicionalmente, foi determinada a correlação da expressão de Mmp-7 e Mmp-9 com fatore neurotroficos, Gdnf e Ngf, e os receptores de dopamina Drd1 e Drd2. A PSREM reverteu as deficiências cognitivas induzidas pela rotenona. Associado a este fenótipo, observamos um aumento significativo na razão da expressão de mRNA de Mmp-7/Reck e Mmp-9/Reck na substancia nigra e a razão Mmp-9/Reck no hipotálamo. Além disso, a correlação positiva das razões de expressão de Mmp/Reck entre a substância nigra e o estriado observada na infusão de rotenona é revertida pela PSREM. Em conjunto, nossos resultados sugerem uma potencial associação orquestrada entre um aumento nas relações de expressão Mmp-7 e -9/Reck na substantia nigra e um efeito positivo no desempenho cognitivo em indivíduos afetados pela PD.
Title in English
Analysis of the expression of metalloproteinases (MMPs) and their inhibitors, Tmp and Reck, in an animal model of Parkinson´s Disease
Keywords in English
Extracellular matrix dynamics
Mmp-7
Mmp-9
Parkinson\'s Disease
Reck
Sleep deprivation
Abstract in English
Parkinsons disease (PD) is the second most common neurodegenerative disorder worldwide. Among its non-motor symptoms, sleep disorders are extremely common and have been linked to cognitive and memory disruption. The microenvironment, in particular the extracellular matrix (ECM), is deeply involved in memory consolidation as well as in neuropathological processes such as inflammation, damage to the bloodbrain barrier, and neuronal death. To better understand ECM dynamics in PD memory disturbances, the present study investigates the orchestrated expression of Mmps (Mmp-3, 7 and 9) and their modulators (Reck and Timp-3) in a rotenone-induced PD model in which an additional intervention in the memory process was introduced through rapid eye movement sleep deprivation (REMSD). Additionally, the correlation of Mmp-7 and -9 expression to the neurotrophic factors Ngf, Gdnf, and the dopamine receptors D1 and D2 was determined. REMSD reversed the rotenone induced cognitive impairments. Associated to this phenotype, we observed a significant increase in Mmp-7/Reck and Mmp-9/Reck mRNA expression ratio in the substantia nigra, and Mmp-9/Reck ratio in the hypothalamus. Moreover, the positive correlation of Mmp/Reck expression ratios between the substantia nigra and the striatum observed upon rotenone infusion is reversed by REMSD. Taken together, our results suggest a potential orchestrated association between an increase in Mmp-7 and - 9/Reck expression ratios in the substantia nigra and a positive effect on cognitive performance in subjects affected by PD.
 
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Publishing Date
2021-10-13
 
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