Abstract
A marked elevation in plasma chitotriosidase (chitinase) activity has recently been observed in patients with Gaucher disease (Hollak et al 1994). It has been suggested that this phenomenon may serve as a useful marker for the efficacy of treatment with enzyme replacement therapy. We report our findings on the comparison of plasma chitotriosidase levels in 8 patients treated with the modified human placental enzyme alglucerase and 8 patients treated by allogeneic bone marrow transplantation (BMT). Two years after transplantation the activity in the BMT patients had fallen by over 93% and has continued to fall. Now, 5-12 years post-BMT, 6 patients have normal levels of plasma chitotriosidase and 2 patients have activities slightly above the reference range. Patients have been treated with alglucerase for a considerably shorter time than the BMT patients. The chitotriosidase activities have fallen and are continuing to fall in 7 patients but at a slower rate than in the BMT group. In one patient there has been no appreciable change in activity over the last 6 months, which would suggest that she may be on too low a dosage.
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Young, E., Chatterton, C., Vellodi, A. et al. Plasma chitotriosidase activity in Gaucher disease patients who have been treated either by bone marrow transplantation or by enzyme replacement therapy with alglucerase. J Inherit Metab Dis 20, 595–602 (1997). https://doi.org/10.1023/A:1005367328003
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DOI: https://doi.org/10.1023/A:1005367328003