Unveiling the olfactory proteostatic dissangement in Parkinson's disease by proteome-wide profiling
Olfactory dysfunction is one of the earliest features in Lewy-type alphasynucleinopathies (LTS) such as Parkinson´s disease (PD). However, the underlying molecular mechanisms associated to smell impairment are poorly understood. Applying mass spectrometry-based quantitative proteomics in postmortem...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/141815 |
| Acceso en línea: | https://hdl.handle.net/2445/141815 |
| Access Level: | acceso abierto |
| Palabra clave: | Olfacte Malaltia de Parkinson Proteòmica Biologia de sistemes Smell Parkinson's disease Proteomics Systems biology |
| Sumario: | Olfactory dysfunction is one of the earliest features in Lewy-type alphasynucleinopathies (LTS) such as Parkinson´s disease (PD). However, the underlying molecular mechanisms associated to smell impairment are poorly understood. Applying mass spectrometry-based quantitative proteomics in postmortem olfactory bulbs (OB) across limbic, early-neocortical, and neocortical LTS stages of parkinsonian subjects, a proteostasis impairment was observed, identifying 268 differentially expressed proteins between controls and PD phenotypes. In addition, network-driven proteomics revealed a modulation in ERK1/2, MKK3/6, and PDK1/PKC signalling axis. Moreover, a crossdisease study of selected olfactory molecules in sporadic Alzheimer's disease (AD) cases, revealed different protein derangements in the modulation of Secretagogin (SCGN), Calcyclin binding protein (CACYBP), and Glucosamine 6 phosphate isomerase 2 (GNPDA2) between PD and AD. An inverse correlation between GNPDA2 and α-synuclein protein levels was also reflected in PD cerebrospinal fluid (CSF). Interestingly, PD patients exhibited significantly lower serum GNPDA2 levels than controls (n=82/group). Our study provides important avenues for understanding the OB proteostasis imbalance in PD, deciphering mechanistic clues to the equivalent smell deficits observed in AD and PD pathologies. |
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