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Fig. S1. Interleukin (IL)-1 receptor-associated kinase (IRAK) phosphorylation assay and nuclear factor (NF)-κB activation by seronegative anti-phospholipid syndrome (SN-APS) immunoglobulin (Ig)G fraction from three different patients. Eahy926 cells were incubated with SN-APS IgG (200 μg/ml) from three different patients (Table S1, patients 32, 34 and 35, respectively) for 45 min at 37°C and thereafter whole and nuclear extracts were probed with polyclonal rabbit anti-phospho-IRAK (a) or polyclonal rabbit anti-phospho-NF-κB p65 (b), respectively. Bound antibodies were visualized with horseradish peroxidase (HRP)-conjugated anti-rabbit IgG and immunoreactivity was assessed by enhanced chemiluminescence (ECL). As a control for loading, IRAK blots were stripped and reprobed with polyclonal anti-actin antibody (a), phospho-NF-κB p65 blots were stripped and reprobed with polyclonal anti-histone H1 (b).

Fig. S2. Tissue factor (TF) release by seronegative anti-phospholipid syndrome (SN-APS) IgG fraction from three different patients. Cells were stimulated with SN-APS immunoglobulin (Ig)G (200 μg/ml) from three different patients (Table S1, patients 32, 34 and 35, respectively) for 4 h at 37°C. After treatment, the supernatants were collected and analysed using a commercially available enzyme-linked immunosorbent assay (ELISA) kit. Results are expressed as mean ± standard deviation from three different experiments.

Table S1. Clinical and serological profile of seronegative anti-phospholipid syndrome (SN-APS) patients.

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CEI_4532_sm_FS1.jpg120KSupporting info item
CEI_4532_sm_FS2.jpg70KSupporting info item
CEI_4532_sm_TS1.docx82KSupporting info item

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