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- W4231945484 abstract "2520 Background: Active immunotherapy of FL is a promising therapeutic strategy. Anti-idiotype (Id) antibody and T-cell responses to Id-KLH have been correlated with responses in patients with FL. In a phase II trial, we evaluated the efficacy of Id-KLH vaccination in patients with FL, after cytoreduction with rituximab and during B-lymphopenia. Anti-Id responses were measured and the TTP was compared to historical data for rituximab alone. Methods: Pts with gr 1,2 FL who were treatment naïve; relapsed/refractory to chemo or relapsed after rituximab were eligible. Rituximab (375mg/m2 weekly x4) was followed by response assessment at wk10. Pts with at least SD (CR/PR/SD) started Id-KLH (1 mg s.q. monthly x 6) 12 wks after the first dose of rituximab. GM-CSF 250 mcg was given s.q. at the Id-KLH injection site on days 1–4. Pts with at least SD after 6 doses of Id-KLH could continue receiving the immunotherapy until progression. 123 pts were biopsied and 95 were eligible. Prior trerapy (in 60 of 95) was chemo and rituximab (31) chemotherapy alone (23) or rituximab alone (6). Id-KLH was successfully manufactured in 100% of eligible pts. All eligible pts have received rituximab and 58 pts have begun Id-KLH. Results: 36 patients (all previously treated) have a minimum of 6 months follow-up from first rituximab dose and are included in this preliminary analysis. 5 pts progressed after rituximab and did not receive Id-KLH. Robust T-cell responses to both Id and KLH were observed (3 of 3 pts). Anti-KLH antibody responses were seen in 2 of 10 pts and were delayed until B-cell recovery. 85% of the Id-KLH treated patients were without disease progression after a median of 9.7 months follow-up, compared with 56% of historical controls treated with rituximab alone (Witzig 2002 JCO 20:2453). Adverse events were infrequent with injection site reaction being most common. Conclusions: Id-KLH induces immune responses even after rituximab mediated B-cell depletion in FL patients. Preliminary data suggest that Id-KLH may prolong TTP after rituximab therapy and this strategy will be tested in a randomized phase III trial. No significant financial relationships to disclose." @default.
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- W4231945484 date "2004-07-15" @default.
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- W4231945484 title "Successful anti-Id T-cell responses to Id-KLH immunotherapy in B-cell depleted patients with follicular lymphoma (FL) may prolong TTP after rituximab: Phase II trial of FavId" @default.
- W4231945484 doi "https://doi.org/10.1200/jco.2004.22.14_suppl.2520" @default.
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