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DOI: 10.1590/0004-282X20180035
Circulating levels of neurotrophic factors are unchanged in patients with Parkinson's disease
Os níveis circulantes de fatores neurotróficos não estão alterados em pacientes com doença de Parkinson
ABSTRACT
There is great evidence linking neurotrophic factor (NF) dysfunction with Parkinson's disease (PD) pathophysiology. This study was conducted to evaluate plasma levels of NFs and their possible associations with clinical symptoms in PD. For this purpose, 40 PD patients and 25 controls were subjected to a clinical evaluation and peripheral blood draw. Plasma levels of brain-derived neurotrophic factor (BDNF), pro-BDNF, neurotrophin 3, neurotrophin 4, nerve growth, glial cell line-derived neurotrophic factor and ciliary neurotrophic factor were measured by enzyme-linked immunosorbent assay. There was no significant difference between PD patients and controls regarding the plasma levels of the evaluated NFs. In addition, NF levels were not associated with disease duration, degree of motor or functional impairment, cognitive performance or severity of depressive symptoms. In conclusion, although NFs may play relevant roles in the pathophysiology of PD, the circulating levels of these molecules are not necessarily changed in patients with PD.
RESUMO
Há evidências de que alteracões nas ações exercidas por fatores neurotróficos (FNs) estejam associadas à fisiopatologia da doença de Parkinson (DP). O presente estudo foi conduzido para avaliar os níveis plasmáticos de FNs e suas possíveis associações com sintomas clínicos na DP. Para este fim, 40 pacientes com DP e 25 controles foram submetidos à avaliação clínica e coleta de sangue periférico. Os níveis plasmáticos do fator neurotrófico derivado do cérebro (BDNF), pro-BDNF, neurotrofina 3, neurotrofina 4, fator de crescimento do nervo, fator neurotrófico derivado da glia e fator neurotrófico ciliar foram avaliados por ensaio de imunoadsorção enzimática. Não houve diferença significativa entre pacientes com DP e controles quanto aos níveis plasmáticos dos FNs avaliados. Além disso, não encontramos associação entre os níveis dos FNs e duração da doença, grau de comprometimento motor ou funcional, desempenho cognitivo e gravidade dos sintomas depressivos. Em conclusão, embora os FNs possam desempenhar papéis relevantes na fisiopatologia da DP, os níveis circulantes dessas moléculas não estão necessariamente alterados em pacientes com DP.
Palavras-chave:
doença de Parkinson - fatores de crescimento neural - depressão - biomarcadores - cogniçãoSupport
This study was funded by Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES).
Publication History
Received: 22 November 2017
Accepted: 22 January 2018
Article published online:
25 August 2023
© 2023. Academia Brasileira de Neurologia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commecial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)
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