TY - JOUR
T1 - Phase I/II 90Y-Zevalin (yttrium-90 ibritumomab tiuxetan, IDEC-Y2B8) radioimmunotherapy dosimetry results in relapsed or refractory non-Hodgkin's lymphoma
AU - Wiseman, Gregory A.
AU - White, Christine A.
AU - Stabin, Michael
AU - Dunn, William L.
AU - Erwin, William
AU - Dahlbom, Magnus
AU - Raubitschek, Andrew
AU - Karvelis, Kastytis
AU - Schultheiss, Timothy
AU - Witzig, Thomas E.
AU - Belanger, Richard
AU - Spies, Stewart
AU - Silverman, Daniel H.S.
AU - Berlfein, Judy R.
AU - Ding, Eric
AU - Grillo-López, Antonio J.
N1 - Funding Information:
This work was supported by IDEC Pharmaceuticals Corporation, San Diego, CA 92121.
PY - 2000
Y1 - 2000
N2 - Dosimetry studies in patients with non-Hodgkin's lymphoma were performed to estimate the radiation absorbed dose to normal organs and bone marrow from 90Y-Zevalin (yttrium-90 ibritumomab tiuxetan, IDEC-Y2B8) treatment in this phase I/II, multicenter trial. The trial was designed to determine the dose of Rituximab (chimeric anti-CD20, Rituxan, IDEC-C2B8, MabThera), the unlabeled antibody given prior to the radioconjugate to clear peripheral blood B cells and optimize distribution, and to determine the maximum tolerated dose of 90Y-Zevalin [7.4, 11, or 15 MBq/kg (0.2, 0.3, or 0.4 mCi/kg)]. Patients received 111In-Zevalin (indium111 ibritumomab tiuxetan, IDEC-In2B8) on day 0 followed by a therapeutic dose of 90Y-Zevalin on day 7. Both doses were preceded by an infusion of the chimeric, unlabeled antibody Rituximab. Following administration of 111In-Zevalin, serial anterior/posterior whole-body scans were acquired. Major-organ radioactivity versus time estimates were calculated using regions of interest. Residence times were computed and entered into the MIRDOSE3 computer software program to calculate estimated radiation absorbed dose to each organ. Initial analyses of estimated radiation absorbed dose were completed at the clinical site. An additional, centralized dosimetry analysis was performed subsequently to provide a consistent analysis of data collected from the seven clinical sites. In all patients with dosimetry data (n=56), normal organ and red marrow radiation absorbed doses were estimated to be well under the protocol-defined upper limit of 20 Gy and 3 Gy, respectively. Median estimated radiation absorbed dose was 3.4 Gy to liver (range 1.2-7.8 Gy), 2.6 Gy to lungs (range 0.72-4.4 Gy), and 0.38 Gy to kidneys (range 0.07- 0.61 Gy). Median estimated tumor radiation absorbed dose was 17 Gy (range 5.8-67 Gy). No correlation was noted between hematologic toxicity and the following variables: red marrow radiation absorbed dose, blood T 1/2 , blood AUC plasma T 1/2 , and plasma AUC. It is concluded that 90Y. Zevalin administered at nonmyeloablative maximum tolerated doses results in acceptable radiation absorbed doses to normal organs. The only toxicity of note is hematologic and is not correlated to red marrow radiation absorbed dose estimates or T 1/2 , reflecting that hematologic toxicity is dependent on bone marrow reserve in this heavily pretreated population.
AB - Dosimetry studies in patients with non-Hodgkin's lymphoma were performed to estimate the radiation absorbed dose to normal organs and bone marrow from 90Y-Zevalin (yttrium-90 ibritumomab tiuxetan, IDEC-Y2B8) treatment in this phase I/II, multicenter trial. The trial was designed to determine the dose of Rituximab (chimeric anti-CD20, Rituxan, IDEC-C2B8, MabThera), the unlabeled antibody given prior to the radioconjugate to clear peripheral blood B cells and optimize distribution, and to determine the maximum tolerated dose of 90Y-Zevalin [7.4, 11, or 15 MBq/kg (0.2, 0.3, or 0.4 mCi/kg)]. Patients received 111In-Zevalin (indium111 ibritumomab tiuxetan, IDEC-In2B8) on day 0 followed by a therapeutic dose of 90Y-Zevalin on day 7. Both doses were preceded by an infusion of the chimeric, unlabeled antibody Rituximab. Following administration of 111In-Zevalin, serial anterior/posterior whole-body scans were acquired. Major-organ radioactivity versus time estimates were calculated using regions of interest. Residence times were computed and entered into the MIRDOSE3 computer software program to calculate estimated radiation absorbed dose to each organ. Initial analyses of estimated radiation absorbed dose were completed at the clinical site. An additional, centralized dosimetry analysis was performed subsequently to provide a consistent analysis of data collected from the seven clinical sites. In all patients with dosimetry data (n=56), normal organ and red marrow radiation absorbed doses were estimated to be well under the protocol-defined upper limit of 20 Gy and 3 Gy, respectively. Median estimated radiation absorbed dose was 3.4 Gy to liver (range 1.2-7.8 Gy), 2.6 Gy to lungs (range 0.72-4.4 Gy), and 0.38 Gy to kidneys (range 0.07- 0.61 Gy). Median estimated tumor radiation absorbed dose was 17 Gy (range 5.8-67 Gy). No correlation was noted between hematologic toxicity and the following variables: red marrow radiation absorbed dose, blood T 1/2 , blood AUC plasma T 1/2 , and plasma AUC. It is concluded that 90Y. Zevalin administered at nonmyeloablative maximum tolerated doses results in acceptable radiation absorbed doses to normal organs. The only toxicity of note is hematologic and is not correlated to red marrow radiation absorbed dose estimates or T 1/2 , reflecting that hematologic toxicity is dependent on bone marrow reserve in this heavily pretreated population.
KW - Dosimetry
KW - IDEC- Y2B8
KW - Non-Hodgkin's lymphoma
KW - Radioimmunotherapy
KW - Rituximab
KW - Yttrium 90 Zevalin
UR - http://www.scopus.com/inward/record.url?scp=0033922969&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033922969&partnerID=8YFLogxK
U2 - 10.1007/s002590000276
DO - 10.1007/s002590000276
M3 - Article
C2 - 10952488
AN - SCOPUS:0033922969
SN - 0340-6997
VL - 27
SP - 766
EP - 777
JO - European Journal of Nuclear Medicine
JF - European Journal of Nuclear Medicine
IS - 7
ER -