Koichi Kamei1, Masao Ogura2, Mai Sato2, Shuichi Ito3, Kenji Ishikura2. 1. Division of Nephrology and Rheumatology, National Center for Child Health and Development, 2-10-1, Okura, Setagaya-ku, Tokyo, 157-8535, Japan. kamei-k@ncchd.go.jp. 2. Division of Nephrology and Rheumatology, National Center for Child Health and Development, 2-10-1, Okura, Setagaya-ku, Tokyo, 157-8535, Japan. 3. Department of Pediatrics, Yokohama City University Graduate School pf Medicine, 3-9, Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan.
Abstract
BACKGROUND: Infusion reaction (IR) is defined as an adverse event within 24 h after monoclonal antibody infusion. In non-Hodgkin lymphoma, IR incidence following rituximab treatment is high (77-80%), but there are no data in complicated nephrotic syndrome. METHODS: Records of rituximab infusions in patients with complicated nephrotic syndrome between February 2006 and December 2014 at the National Center for Child Health and Development were reviewed. Rituximab was administered at doses of 375 mg/m2. The severity of IR was evaluated using the Common Terminology Criteria for Adverse Events ver. 4.0. RESULTS: For 309 rituximab infusions in 159 patients (male, 110; median age, 12 years), IR was observed in 165 infusions (53.4%). Respiratory symptoms were most common (66% of all events). Ninety-five percent of the IR was observed within 3 h after rituximab infusion initiation. Sixty-eight percent of the events were classified as grade 1 and others classified as grade 2. Only 18% required medical intervention. CD20 cell count in patients with IR was significantly higher than in patients without IR. Incidence of IR was similar in subsequent rituximab treatment after B-cell recovery. Patients who experienced IR at first rituximab treatment were more likely to experience recurrent IR with subsequent treatments compared to those not having IR at initial treatment (odds ratio 3.64; p < 0.001). CONCLUSIONS: In patients with complicated nephrotic syndrome, respiratory symptoms were the major type of IR, mostly observed within 3 h of infusion. Incidence of IR was lower and its severity milder in patients with complicated nephrotic syndrome than those with lymphoma.
BACKGROUND: Infusion reaction (IR) is defined as an adverse event within 24 h after monoclonal antibody infusion. In non-Hodgkin lymphoma, IR incidence following rituximab treatment is high (77-80%), but there are no data in complicated nephrotic syndrome. METHODS: Records of rituximab infusions in patients with complicated nephrotic syndrome between February 2006 and December 2014 at the National Center for Child Health and Development were reviewed. Rituximab was administered at doses of 375 mg/m2. The severity of IR was evaluated using the Common Terminology Criteria for Adverse Events ver. 4.0. RESULTS: For 309 rituximab infusions in 159 patients (male, 110; median age, 12 years), IR was observed in 165 infusions (53.4%). Respiratory symptoms were most common (66% of all events). Ninety-five percent of the IR was observed within 3 h after rituximab infusion initiation. Sixty-eight percent of the events were classified as grade 1 and others classified as grade 2. Only 18% required medical intervention. CD20 cell count in patients with IR was significantly higher than in patients without IR. Incidence of IR was similar in subsequent rituximab treatment after B-cell recovery. Patients who experienced IR at first rituximab treatment were more likely to experience recurrent IR with subsequent treatments compared to those not having IR at initial treatment (odds ratio 3.64; p < 0.001). CONCLUSIONS: In patients with complicated nephrotic syndrome, respiratory symptoms were the major type of IR, mostly observed within 3 h of infusion. Incidence of IR was lower and its severity milder in patients with complicated nephrotic syndrome than those with lymphoma.
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