Relation between plasma glucosylsphingosine levels and established Gaucher biomarkers. Correlation between plasma glucosylsphingosine and chitotriosidase activity in type 1 Gaucher patients with wild-type CHIT genotype (n = 34; A) and carriers of the 24 bp duplication in the CHIT gene (n = 15; B). Correlation of plasma glucosylsphingosine level of type 1 Gaucher patients and cytokine CCL18 (n = 36; C) and macrophage inflammatory protein MIP-1β (n = 37; D).