Affiliations: [a] Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK
| [b] Department of Neurodegeneration, Dementia Research Centre, Institute of Neurology, London, UK
| [c] Department of Neuroimmunology, Institute of Neurology, University College London, London, UK
| [d] Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
Correspondence:
[*]
Correspondence to: Jamie Toombs, Department of Molecular Neuroscience, Institute of Neurology, Queen Square House, University College London, London, WC1N 3BG, UK. Tel.: +44 02034484204; E-mail: j.toombs@ucl.ac.uk.
Abstract: The effect of spinal manometers on cerebrospinal fluid (CSF) amyloid-β (Aβ) concentration was investigated. Pooled human CSF samples were divided in two, one half passed through a manometer into a collection tube, the other transferred directly to a collection tube. CSF was analyzed for Aβ38/40/42 using an electrochemiluminescence immunoassay. Relative to control, use of a manometer decreased Aβ38/40/42 concentration by 5.6% (±1.5SE), 4.4% (±1.7SE), and 4.3% (±2.4SE), respectively. The ratios of Aβ42 :40, Aβ42 :38, and Aβ40 :38 were not affected by manometer treatment. Factors which artificially lower CSF Aβ concentrations are relevant to clinical diagnosis for AD and study design.
