Abstract |
Hodgkin lymphoma (HL) and systemic anaplastic large cell lymphoma (sALCL) are rare lymphoproliferative cancer types. Although most HL patients can be cured by chemo- and radio- therapy, 4-50% of patients relapse and have a poor prognosis. The need for improved therapeutic options for patients with relapsed or refractory disease has been addressed by CD30-specific antibody-based immunotherapeutics. However, available CD30-specific monoclonal antibodies (mAbs), antibody drug conjugates (ADCs) or chimeric immunotoxins suffer from the requirement of a functional host immunity, undesirable immune reactions or heterogeneity and instability, respectively. Here, we present a new fusion protein comprised of the CD30-specific antibody single-chain fragment Ki4(scFv) and the human pro-apoptotic effector protein, microtubule-associated protein tau (MAPT). Ki4(scFv)-MAP selectively induced apoptosis in rapidly proliferating L540cy, L428, and Karpas 299 cells in a dose-dependent manner. Tubulin polymerization assays confirmed that Ki4(scFv)-MAP stabilizes microtubules, suggesting a mechanism for its pro-apoptotic action. Dose-finding experiments proved that Ki4(scFv)-MAP is well tolerated in mice compared to the previously reported Ki4(scFv)-ETA'. Ki4(scFv)-MAP significantly inhibited growth of subcutaneous L540cy xenograft tumours in mice. Our data present a novel approach for the treatment of CD30(+) lymphomas, combining the binding specificity of a target-specific antibody fragment with the selective cytotoxicity of MAPT towards proliferating lymphoma cells.
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Authors | Dmitrij Hristodorov, Johannes Nordlohne, Radoslav Mladenov, Michael Huhn, Rainer Fischer, Theo Thepen, Stefan Barth |
Journal | British journal of haematology
(Br J Haematol)
Vol. 164
Issue 2
Pg. 251-7
(Jan 2014)
ISSN: 1365-2141 [Electronic] England |
PMID | 24164493
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | © 2013 John Wiley & Sons Ltd. |
Chemical References |
- Ki-1 Antigen
- Recombinant Fusion Proteins
- Single-Chain Antibodies
- tau Proteins
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Topics |
- Animals
- Antibody-Dependent Cell Cytotoxicity
- Apoptosis
(drug effects)
- Cell Line, Tumor
- Disease Models, Animal
- Female
- Hodgkin Disease
(metabolism, pathology)
- Humans
- Ki-1 Antigen
(immunology, metabolism)
- Mice
- Microtubules
(metabolism)
- Protein Binding
- Protein Stability
- Recombinant Fusion Proteins
(immunology, metabolism, pharmacology)
- Single-Chain Antibodies
(immunology, metabolism, pharmacology)
- Tumor Burden
(drug effects)
- Xenograft Model Antitumor Assays
- tau Proteins
(immunology, metabolism)
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