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• W2898829572 abstract "Parkinson’s Disease (PD) is the second most common neurodegenerative disorder, with 60,000 new cases diagnosed each year in the US. There are multiple animal models of PD that attempt to mimic the effects of the disease through genetic alteration. Combined with advanced imaging techniques, these animal models are critical in tracking the neurobiological and behavioral aspects of disease progression and identifying early biomarkers of PD. PTEN-induced putative kinase 1 (PINK1) is a mitochondrial protein kinase involved in protecting neurons from stress-induced mitochondrial dysfunction. A mutation in the PINK1 gene that alters its function can increase the risk for autosomal recessive familial PD and similarly, through genetic deletion of portions of the PINK1 gene in animal models (i.e., “PINK1 knock-out (−/−) rats) produces a progressive loss of dopaminergic neurons in the substantia nigra which is analogous to the pathological hallmarks in human PD patients. In this exploratory study, we used volumetric analysis, resting-state functional connectivity MRI (rs-fcMRI) and diffusion-weighted imaging (DWI) to identify neurobiological differences between wild-type (WT) and PINK1 (−/−) rats. All voxel-based measures for each modality were registered to a rat MRI atlas with 171 segmented and annotated brain regions allowing for the measurement of subtle changes in brain function and architecture that go well beyond typical clinical MRI scanning protocols. Basal ganglia, the mesencephalic dopamine system, the limbic cortex, and the hippocampal complex showed changes in putative gray matter microarchitecture, reflected by shifts in quantitative anisotropy. Rs-fcMRI revealed altered resting state connectivity in many brain areas including the basal ganglia, amygdala, cortex, septum, pons etc. Taken together, these results inform us on a wide range of whole-brain changes occurring in a PD rat model in the absence of cognitive and motor deficits, serving as potential biomarkers and targets for treatment." @default.
• W2898829572 created "2018-11-09" @default.
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• W2898829572 date "2019-03-01" @default.
• W2898829572 modified "2023-09-23" @default.
• W2898829572 title "In search of early neuroradiological biomarkers for Parkinson’s Disease: Alterations in resting state functional connectivity and gray matter microarchitecture in PINK1 −/− rats" @default.
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• W2898829572 doi "https://doi.org/10.1016/j.brainres.2018.10.033" @default.
• W2898829572 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30389398" @default.
• W2898829572 hasPublicationYear "2019" @default.
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