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  • Title: Nonprecipitous changes upon withdrawal from imiglucerase for Gaucher disease because of a shortage in supply.
    Author: Zimran A, Altarescu G, Elstein D.
    Journal: Blood Cells Mol Dis; 2011 Jan 15; 46(1):111-4. PubMed ID: 20542712.
    Abstract:
    Because of an unpredicted and unavoidable shortage in global supplies of imiglucerase for Gaucher disease, we collected clinical and laboratory data from patients who were evaluated ≤ 6months before drug withdrawal and then retested before/during reinstatement of therapy. Hemoglobin, platelet counts, and liver and spleen index volumes by ultrasound as well as chitotriosidase were evaluated as percent change over time and relative to dose-years of exposure to enzyme therapy. Deterioration was seen in all four clinical parameters and in chitotriosidase activity in most patients and even among patients who stopped for only 3 months. No patient consistently showed nondeterioration in all five parameters. Platelet counts were most sensitive to therapy withdrawal. There was no overt correlation between percent change in these parameters and dose-years of therapy. Although we no longer think that drug vacations should be considered as a form of maintenance for patients requiring enzyme therapy for Gaucher disease, but if necessary-for compelling personal reasons-one may be reassured that a short-term drug interruption is not likely to lead to irreversible complications or return to baseline values of critical clinical parameters.
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