Can Cell Bound Complement Activation Products Predict Inherited Complement Deficiency in Systemic Lupus Erythematosus?

Table 2

April 1, 2015.

ANA	Result	Reference ranges
Immunofluorescence (IIF)	1 : 1280 (positive)/homogeneous	Negative (<1 : 80); positive (≥1 : 80)
Analyte	Result	Reference ranges
Anti-dsDNA (ELISA)	867 IU/mL (positive, confirmed by Crithidia)	≤301 (negative); > 301 (positive)
Anti-Smith (ELISA)	46 U/mL (positive)	<5 (negative); 5–10 (equivocal); > 10 (positive)
EC4d (FACS)	6 Net MFI (negative)	≤12 (negative); > 12–75 (positive); > 75 (strong positive)
BC4d (FACS)	43 Net MFI (negative)	≤48 (negative); > 48–200 (positive); > 200 (strong positive)
Anti-U1RNP IgG	14 U/ml (positive)	<5 (negative); 5–10 (equivocal); > 10 (positive)
Anti-RNP70 IgG	2 U/ml (negative)	<7 (negative); 7–10 (equivocal); > 10 (positive)
Anti-SS-A/Ro IgG	>240 U/ml (positive)	<7 (negative); 7–10 (equivocal); > 10 (positive)
Anti-SS-B/La lgg	>320 U/ml (positive)	<7 (negative); 7–10 (equivocal); > 10 (positive)
C3	69 mg/dl	90–180 mg/dl
C4	3 mg/dl	16–47 mg/dl

ELISA: enzyme-linked immunosorbent assay. FACS: fluorescence-activated cell sorting.