Summary:instances of systemic reactions resembling anaphylaxis have been reported in association with PBPC reinfusion; these reactions are frequently attributed to the presence of Anaphylaxis has been reported in subjects receiving peripheral blood precursor cell (PBPC) infusions; howdimethyl sulfoxide (DMSO) (in the cryopreserved cell preparations. [3][4][5] However, in vivo experience with DMSO ever the etiologic agent is unclear. Basophils from a PBPC-allergic subject were challenged with each indihas shown no association with anaphylactic reactions, and in vitro studies suggest that DMSO may actually inhibit vidual component of the stem cell infusion and with recombinant human (rh)DNAse. Histamine release data mediator release from both mast cells and basophils. 6,7 Thus, the pathogenesis of systemic reactions associated were compared with those using basophils from control subjects. Histamine release assays were repeated using with PBPC infusions remains unclear.We report herein the case of a subject with documented basophils from a control subject passively sensitized with serum IgE from the patient. Skin testing with bovanaphylaxis during two consecutive PBPC reinfusions. In vitro testing revealed IgE-mediated sensitivity to bovine ine DNAse was performed using standard techniques. Basophil histamine release occurred in the patient, but DNAse (commonly used to inhibit cellular aggregation), without crossreactivity to commercially available not in controls, with bovine DNAse. No release could be provoked by any of the other components of the infusrhDNAse, and no IgE-related sensitivity to DMSO. ate; no release could be detected with rhDNAse. Sensitivity to bovine DNAse could be transferred to basophils from a control subject with the serum IgE from the Case presentation patient. Marked epicutaneous skin test reactivity to bovine DNAse was evident in the patient, but not in control A 50-year-old female presented in November 1995 with primary peritoneal carcinoma and a CA-125 of 1037 IU/ml.
subjects. We conclude that systemic reactions during peripheral blood precursor cell infusions may representIn December 1995, the patient began a regimen for mobilization of peripheral blood stem cells. Subsequent administrue IgE-mediated anaphylaxis to bovine DNAse in the infusate. Skin testing can detect such sensitivity, and the tration of high-dose carboplatin and paclitaxel in February 1996 was complicated by a hypersensitivity response to use of rhDNAse may obviate such reactions. Keywords: anaphylaxis; stem cell; IgE; DNAse; basopaclitaxel which was managed successfully utilizing newly published guidelines. 8 The patient's first stem cell reinphils fusion occurred 3 days later. Within 5 min of starting, the patient developed flushing with severe pruritus, gastrointestinal distress, shortness of breath, bronchospasm, tachyThe use of autologous peripheral blood progenitor cells cardia, profound hypotension, and altered sensorium. The (PBPCs) for bone marrow reconstitution in the treatment patient required intubatio...