Mild Cognitive Impairment: Cerebrospinal Fluid Tau Biomarker Pathologic Levels and Longitudinal Changes in White Matter Integrity
| Autor: | Anders Skinningsrud, Atle Bjørnerud, Ivar Reinvang, Per Selnes, Inge K Amlien, Ramune Grambaite, Tormod Fladby, Vidar Stenset, Kristine B. Walhovd, Leif Gjerstad, Anders M. Fjell, Paulina Due-Tønnessen |
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| Rok vydání: | 2013 |
| Předmět: |
Adult
Male medicine.medical_specialty Pathology Statistics as Topic Urology tau Proteins Nerve Fibers Myelinated Sensitivity and Specificity White matter Cerebrospinal fluid mental disorders Fractional anisotropy medicine Humans Cingulum (brain) Cognitive Dysfunction Radiology Nuclear Medicine and imaging Longitudinal Studies Cognitive impairment Aged Neurons business.industry Radial diffusivity Reproducibility of Results Middle Aged medicine.disease Magnetic Resonance Imaging medicine.anatomical_structure Biomarker (medicine) Female Alzheimer's disease business Biomarkers |
| Zdroj: | Radiology. 266:295-303 |
| ISSN: | 1527-1315 0033-8419 |
| Popis: | Purpose: To evaluate the relationship between (a) pathologic levels of cerebrospinal fluid (CSF) total tau as an index of the in tensity of ongoing neuronal degeneration and (b) longitudinal changes in white matter (WM) integrity in patients with mild cognitive impairment (MCI). Materials and Methods: Participants gave written informed consent, and the Norwegian committee for medical research ethics approved the study. Thirty patients with MCI and nonpathologic CSF total tau levels, nine patients with MCI and pathologic CSF total tau levels, and 16 age-matched healthy control subjects underwent diffusion-tensor imaging at baseline and after a mean follow-up of 2.6 years 6 0.54 (standard deviation), with range of 1.58–3.98 years. The effect of diagnosis (MCI vs no MCI) at baseline and CSF tau levels at fractional anisotropy (FA), mean diffusivity, radial diffusivity (D R ), and axial diffusivity were tested with tract-based spatial statistics. Differences in WM integrity at baseline and follow-up and change over time were compared among patients with pathologic CSF total tau levels (MCI high tau), patients with normal CSF total tau levels (MCI low tau), and healthy control subjects. Linear mixed-model between-group within-subject analyses were conducted to examine differences in rate of change over time in FA and D R . Results: Longitudinal analysis of regional WM change revealed significant decrease in FA ( P = .038) and increase in D R (P = .018) in the MCI high-tau group relative to control subjects. For D R , the changes were regionally specific to the right cingulum and the right superior and inferior longitudinal fasciculi. Conclusion: Reduction in WM integrity was greater in patients with MCI who had the most intense neuronal degeneration as indexed by using CSF total tau, suggesting that these patients might represent a subgroup of MCI with more intense WM degeneration who are possibly at greater risk of developing Alzheimer disease. q |
| Databáze: | OpenAIRE |
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