Figure 1.
Contact and intrinsic pathway activation in patients and healthy individuals. Dot plots showing plasma levels of intact high molecular weight HK (A), cleaved HK (B), kallikrein:C1 inhibitor (C), FXIIa:C1 (D), FXIa:C1 inhibitor (E), FXIa:α1-antitrypsin (F), FXIa:antithrombin (G), and FIXa:AT (H). Mean ± standard deviation or median (horizontal bars) depicted for Gaussian and non-Gaussian data, respectively; similarly, P values are from t or Mann-Whitney test according to data distribution (n = 28-30 per group). Notably, because the standard curve typically spans 4 logs for FXIa:α1-antitrypsin complex, many patient samples exceeded the upper limit of detection. Samples from 2 patients were not processed because of critical preanalytic issues (low volume).