Cited by 75Radiopharmaceutical Chemistry and ApplicationsMonoclonal and Polyclonal Antibodies ResearchLymphoma Diagnosis and Treatment

Improved Therapeutic Results by Pretargeted Radioimmunotherapy of Non–Hodgkin's Lymphoma with a New Recombinant, Trivalent, Anti-CD20, Bispecific Antibody

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Sharkey, Robert M., Karacay, Habibe, Litwin, Samuel, Rossi, Edmund A., McBride, William J., Chang, Chien-Hsing, Goldenberg, David M.·2008·Cancer Research

Published version of a preprint

Abstract

We examined whether a pretargeting method using a new recombinant anti-CD20 bispecific antibody (bsMAb) followed by 90Y-1,4,7,10-tetraazacyclododecane-N,N′,N′′,N′′′-tetraacetic acid (90Y-DOTA)-peptide could reduce hematologic toxicity yet improve therapeutic responses compared with conventional 90Y-anti-CD20 IgG and a chemically conjugated bsMAb. TF4, a humanized, tri-Fab bsMAb with two Fabs binding CD20 and one Fab binding histamine-succinyl-glycine (HSG), developed by the dock and lock (DNL) method, was tested in nude mice with Ramos B-cell lymphomas. Optimal pretargeting required a 29-h interval between TF4 and 90Y-DOTA-HSG, and 20-fold more moles of TF4. TF4 cleared more rapidly from the blood than anti-CD20 IgG, with early processing in the liver, spleen, and kidney. At 24 h, TF4 improved tumor uptake of 111In-HSG-peptide 2.6-fold [13% versus 5% injected dose per gram (ID/g)] and enhanced tumor to blood ratios >45-fold (770 versus 17), compared with an anti-CD20 Fab × anti-HSG Fab chemical conjugate, and by 1.6-fold (9.0% versus 5.6% ID/g) and 1,600-fold (522 versus 0.32), respectively, compared with radiolabeled anti-CD20 IgG. A severe (≥90%) and prolonged reduction of WBCs was observed at the maximum dose of 90Y-anti-CD20 IgG, whereas pretargeting resulted in a ≤60% transient drop. TF4 pretargeting resulted in highly significant improvement in survival, curing 33% to 90% of the animals, even at relatively low doses, whereas most tumors progressed quickly without cures with 90Y-anti-CD20 IgG. These results indicate an improved therapeutic index with pretargeted radioimmunotherapy (RAIT) using a DNL-constructed tri-Fab, bsMAb, compared with conventional therapy with directly radiolabeled antibody or with a chemically conjugated bsMAb. These encouraging results prompt testing these constructs for pretargeting RAIT in patients. [Cancer Res 2008;68(13):5282–90]

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Crossref · 10.1158/0008-5472.can-08-0037

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  • TF4 is a second bsAb built using the DNL method, directed against CD20 for the treatment of NHL.

    “TF4 is a second bsAb built using the DNL method, directed against CD20 for the treatment of NHL.”
  • In xenografted nude mice, TF4 as a pretargeting agent of 111In-HSG-peptide compared with a one-step approach using parental anti-CD20 mAb hA20 directly labeled with 90Y demonstrated a 1,600-fold improvement of tumor-to-blood ratio and a 1.6-fold improvement of tumor uptake.

    “Studies performed in xenografted nude mice that compared TF4 as a pretargeting agent of an 111 In-HSG-peptide with a one step approach using the parental anti-CD20 mAb (hA20) directly labeled with 90 Y demonstrated an impressive 1,600-fold improvement of the tumor-to-blood ratio, as well as a 1.6-fold improvement of tumor uptake. 63”

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Authors
Sharkey, R. M., Karacay, H., Litwin, S., Rossi, E. A., McBride, W. J., Chang, C.-H., & Goldenberg, D. M.
Affiliations
  • Center for Molecular Medicine and Immunology (US)
  • Fox Chase Cancer Center (US)
  • 3IBC Pharmaceuticals, Inc.;
  • Immunomedics (United States) (US)
Venue
Cancer Research
Published
2008-07-01
Volume
68
Issue
13
Pages
5282-5290
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2138994942
Cited by
75
References
49
Citations by year
2025: 2 · 2024: 5 · 2023: 1 · 2022: 1 · 2019: 4 · 2018: 5 · 2017: 1 · 2016: 1 · 2015: 4 · 2014: 4 · 2013: 7 · 2012: 9
FWCI
7.93
Type
journal article
Language
en
Open access
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • ImmunoMedics
  • National Cancer Institute (P01CA103985)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Radiopharmaceutical Chemistry and Applications
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Lymphoma Diagnosis and Treatment
Keywords
pretargeted radioimmunotherapy, non-Hodgkin lymphoma, tumor-to-blood ratio, hematologic toxicity, therapeutic index, B-cell lymphoma
MeSH terms
Animals, Biological Availability, Female, Humans, Lymphoma, Non-Hodgkin, Mice, Inbred BALB C, Mice, Nude, Models, Biological, Recombinant Fusion Proteins, Tissue Distribution, Tumor Cells, Cultured, Radioimmunotherapy, Drug Delivery Systems, Treatment Outcome, Antibodies, Bispecific, Immunoconjugates, Antigens, CD20, Xenograft Model Antitumor Assays, Mice

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