Effect of Spinal Manometers on Cerebrospinal Fluid Amyloid-β Concentration

J Alzheimers Dis. 2017;56(3):885-891. doi: 10.3233/JAD-161126.

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.

Keywords: Alzheimer’s disease; amyloid-β; biomarkers; cerebrospinal fluid; manometer; pre-analytical factor.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amyloid beta-Peptides / cerebrospinal fluid*
  • Biomarkers / cerebrospinal fluid
  • Electrochemical Techniques
  • Humans
  • Luminescent Measurements
  • Manometry* / instrumentation
  • Specimen Handling
  • Spinal Puncture*

Substances

  • Amyloid beta-Peptides
  • Biomarkers