Plasma levels of soluble TREM2 and neurofilament light chain in TREM2 rare variant carriers | Alzheimer's Research & Therapy | Full Text

Plasma levels of soluble TREM2 and neurofilament light chain in TREM2 rare variant carriers | Alzheimer's Research & Therapy | Full Text

Alzheimer's Research & Therapy

Plasma levels of soluble TREM2 and neurofilament light chain in TREM2 rare variant carriers

• Nicholas J. Ashton, 
• Marc Suárez-Calvet, 
• Amanda Heslegrave, 
• Abdul Hye, 
• Cristina Razquin, 
• Pau Pastor, 
• Raquel Sanchez-Valle, 
• José L. Molinuevo, 
• Pieter Jelle Visser, 
• Kaj Blennow, 
• Angela K. Hodges & 
• Henrik Zetterberg 

Alzheimer's Research & Therapy volume 11, Article number: 94 (2019) Cite this article

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Abstract

Background

Results from recent clinical studies suggest that cerebrospinal fluid (CSF) biomarkers that are indicative of Alzheimer’s disease (AD) can be replicated in blood, e.g. amyloid-beta peptides (Aβ42 and Aβ40) and neurofilament light chain (NFL). Such data proposes that blood is a rich source of potential biomarkers reflecting central nervous system pathophysiology and should be fully explored for biomarkers that show promise in CSF. Recently, soluble fragments of the triggering receptor expressed on myeloid cells 2 (sTREM2) protein in CSF have been reported to be increased in prodromal AD and also in individuals with TREM2 rare genetic variants that increase the likelihood of developing dementia.

Methods

In this study, we measured the levels of plasma sTREM2 and plasma NFL using the MesoScale Discovery and single molecule array platforms, respectively, in 48 confirmed TREM2 rare variant carriers and 49 non-carriers.

Results

Our results indicate that there are no changes in plasma sTREM2 and NFL concentrations between TREM2 rare variant carriers and non-carriers. Furthermore, plasma sTREM2 is not different between healthy controls, mild cognitive impairment (MCI) or AD.

Conclusion

Concentrations of plasma sTREM2 do not mimic the recent changes found in CSF sTREM2.