Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\29632534
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Front+Immunol
2018 ; 9
(ä): 581
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
The C3dg Fragment of Complement Is Superior to Conventional C3 as a Diagnostic
Biomarker in Systemic Lupus Erythematosus
#MMPMID29632534
Troldborg A
; Jensen L
; Deleuran B
; Stengaard-Pedersen K
; Thiel S
; Jensenius JC
Front Immunol
2018[]; 9
(ä): 581
PMID29632534
show ga
INTRODUCTION/OBJECTIVES: In 2012, hypocomplementemia was included in the
classification criteria of systemic lupus erythematosus (SLE). The suggested
measurement of C3 or C4 often reflect disease activity poorly. Our objective was
to establish an assay measuring C3dg, which is generated following complement
activation, and to evaluate the assay in a cross-sectional SLE cohort. METHOD: We
included SLE patients (n?=?169) and controls (n?=?170) and developed a modified
C3dg assay where C3dg fragments were separated from the large plasma proteins by
polyethylene glycol (PEG), and the supernatant containing the C3dg fragment was
used for analysis in an antibody-based sandwich-type assay. Gel permeation
chromatography and western blotting were used to establish the optimal conditions
for PEG precipitation. RESULTS: 16% PEG was optimal for separating C3dg from C3
and the larger protein fragments. The assay showed a high degree of stability
when using EDTA plasma, and measurements correlated well with commercially
available complement activation assays. SLE patients had higher concentrations in
plasma of C3dg than controls (p?0.05). ROC analysis showed that the C3dg
activation fragment of C3 with an AUC of 0.96 (CI 0.94-0.98) was superior to C3
(AUC 0.52) in differentiating between patients and controls. CONCLUSION: Our
results present a modified assay for the measurement of C3dg. We demonstrate that
C3dg was superior to conventional C3 measurements in discriminating SLE patients
from controls. We suggest that C3dg should be considered as a complement
activation measurement in the SLE classification criteria.