Browsing by Author "Outeiro, Tiago"
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- Gut status in Parkinson’s disease: the GutSPark protocolPublication . Grunho, Miguel; Godinho, Catarina; Matos, António Alves de; Barroso, Helena; Carregosa, Ricardo; Marx, Frederico; Tomé, Morgane; Domingos, Josefa; Sousa-catita, Diogo; Botelho, João; Machado, Vanessa; Mendes, José João; Outeiro, Tiago; Fonseca, JorgeThe neuropathological hallmark of Parkinson’s disease (PD) is the accumulation of alpha–synuclein (AS) aggregates. The identification of AS aggregates in gut biopsy specimens from people with PD may provide an opportunity to identify PD at a very early stage, prior to symptom onset. Changes in gut microbiota and inflammatory conditions (such as periodontitis) may be linked with PD onset/evolution. This project aims to explore the concept of microbiota–gut–brain axis in PD, studying gut biopsy specimens for AS aggregates, oral and intestinal microbiota, associated digestive disorders and oral health, of both patients with PD and controls.
- Inflammatory bowel disease, alpha-synuclein aggregates and Parkinson’s disease: the InflamaSPark protocolPublication . Grunho, Miguel; Godinho, Catarina; Patita, Marta; Mocanu, Irina; Vieira, Ana Isabel; De Matos, António; Carregosa, Ricardo; Marx, Frederico; Tomé, Morgane; Sousa-Catita, Diogo; Proença, Luís; Outeiro, Tiago; Fonseca, JorgeThe hallmark of Parkinson’s disease (PD) is the accumulation of alpha-synuclein (AS) aggregates. Prior to the central nervous system involvement, PD establishes itself in the gut as a result of the complex interplay between microbiota, the host’s immune/neural systems and increased intestinal permeability. Inflammatory Bowel Disease (IBD) patients present a higher number of AS aggregates in the intestinal wall and an increased risk of developing PD. By studying AS aggregates in gut biopsy specimens of IBD patients and controls, this project aims to further clarify the pathophysiology of PD and to explore the potential of gut a biopsy for AS aggregates as a biomarker for prodromal PD.
- Neuromelanin magnetic resonance imaging of the Substantia Nigra in LRRK2-related Parkinson’s DiseasePublication . Guedes, Leonor Correia; Reimão, Sofia; Paulino, Patrícia; Nunes, Rita G.; Bouça-Machado, Raquel; Abreu, Daisy; Gonçalves, Nilza; Soares, Tiago; Fabbri, Margherita; Godinho, Catarina; Lobo, Patrícia Pita; Neutel, Dulce; Quadri, Marialuisa; Coelho, Miguel; Rosa, Mário M.; Campos, Jorge; Outeiro, Tiago; Sampaio, Cristina; Bonifati, Vincenzo; Ferreira, Joaquim J.
- Predictors of drooling severity in people with Parkinson’s diseasePublication . Nascimento, David; Meira, Bruna; Garcez, Luís; Abreu, Daisy; Outeiro, Tiago; Guimarães, Isabel; Ferreira, Joaquim J.Background Drooling, defned as the unintentional loss of saliva from the anterior oral cavity, remains poorly understood in terms of the underlying clinical factors in people with Parkinson’s disease (PwP). This study aims to clarify these factors by analyzing predictors and secondarily the correlates with the severity of drooling in PwP. Methods We conducted a cross-sectional study involving 42 PwP with drooling and 59 without drooling. Clinical assess ments were performed, and the primary outcome was the item 2.2 Saliva and drooling of the Movement Disorder Society Unifed Parkinson’s Disease Rating Scale. The Mann–Whitney test was used to compare the distribution diferences in clinical variables between PwP with and without drooling. The Spearman test was used to examine correlations with drooling, and ordinal logistic regression was used to examine predictors of drooling. Results PwP with drooling showed signifcantly greater impairments in axial signs, posture, facial expression, speech, swallowing, oromotor, motor and non-motor domains than PwP without drooling. Longer disease duration, higher disease severity, levodopa equivalent daily dose, axial signs, unstimulated salivary fow rate, and impairments in speech, posture, facial expression, swallowing, oromotor, motor and non-motor domains were signifcantly correlated with a higher score on the item 2.2. Male sex, poorer swallowing, oromotor and speech functions were strong predictors of higher scores on the item 2.2 Saliva and drooling. Conclusions Male PwP with swallowing disorders, oromotor and speech impairments are signifcantly more likely to have severe drooling. Targeted interventions aimed at these swallowing, oromotor, and speech impairments may ofer promising approaches to reducing drooling severity in PwP.