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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Alzheimers+Dis
2015 ; 48
(1
): 63-72
Nephropedia Template TP
gab.com Text
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English Wikipedia
Increased Number of Plasma B Cells Producing Autoantibodies Against A?42
Protofibrils in Alzheimer s Disease
#MMPMID26401929
Söllvander S
; Ekholm-Pettersson F
; Brundin RM
; Westman G
; Kilander L
; Paulie S
; Lannfelt L
; Sehlin D
J Alzheimers Dis
2015[]; 48
(1
): 63-72
PMID26401929
show ga
The Alzheimer's disease (AD)-related peptide amyloid-? (A?) has a propensity to
aggregate into various assemblies including toxic soluble A? protofibrils.
Several studies have reported the existence of anti-A? antibodies in humans.
However, it is still debated whether levels of anti-A? antibodies are altered in
AD patients compared to healthy individuals. Formation of immune complexes with
plasma A? makes it difficult to reliably measure the concentration of circulating
anti-A? antibodies with certain immunoassays, potentially leading to an
underestimation. Here we have investigated anti-A? antibody production on a
cellular level by measuring the amount of anti-A? antibody producing cells
instead of the plasma level of anti-A? antibodies. To our knowledge, this is the
first time the anti-A? antibody response in plasma has been compared in AD
patients and age-matched healthy individuals using the enzyme-linked immunospot
(ELISpot) technique. Both AD patients and healthy individuals had low levels of B
cells producing antibodies binding A?40 monomers, whereas the number of cells
producing antibodies toward A?42 protofibrils was higher overall and
significantly higher in AD compared to healthy controls. This study shows, by an
alternative and reliable method, that there is a specific immune response to the
toxic A? protofibrils, which is significantly increased in AD patients.