Article citationsMore>>
Aarntzen, E.H., Srinivas, M., De Wilt, J.H., Jacobs, J.F., Lesterhuis, W.J., Windhorst, A.D., Troost, E.G., Bonenkamp, J.J., van Rossum, M.M., Blokx, W.A., Mus, R.D., Boerman, O.C., Punt, C.J., Figdor, C.G., Oyen, W.J. and de Vries, I.J. (2011) Early Identification of Antigen-Specific Immune Responses in Vivo by [18F]-Labeled 3’-Fluoro-3’-Deoxy-Thymidine ([18F]FLT) PET Imaging. Proceedings of the National Academy of Sciences of the United States of America, 108, 18396-18399.
http://dx.doi.org/10.1073/pnas.1113045108
has been cited by the following article:
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TITLE:
Preclinical Evaluation of CD40-Directed Immunotherapy in B-Cell Lymphoma Using [18F]Fluorothymidine-PET
AUTHORS:
Nicolas Graf, Zhoulei Li, Ken Herrmann, Michaela Aichler, Jolanta Slawska, Axel Walch, Christian Peschel, Markus Schwaiger, Andreas K. Buck, Tobias Dechow, Ulrich Keller
KEYWORDS:
CD40 Antibody, FLT-PET, Lymphoma, Therapy Monitoring
JOURNAL NAME:
Advances in Molecular Imaging,
Vol.5 No.2,
April
9,
2015
ABSTRACT: Background: Inhibition of the lymphoma surface antigen CD40 by the
antagonistic CD40 antibody NVP-HCD122 (HCD122) demonstrates activity in various
lymphoma subtypes. In this preclinical in
vivo study we examined the suitability of positron emission tomography
(PET) using the thymidine analogue 3’-deoxy-3’-[18F]fluorothymidine
(FLT) for early response assessment upon HCD122 treatment in diffuse large B
cell lymphoma (DLBCL). Methods: Immunodeficient mice bearing human DLBCL
xenografts (SU-DHL-4) received weekly intraperitoneal injections of HCD122.
Tumor growth was followed up until Day 14. Molecular imaging with FLT-PET was
performed before (Day 0) and after start of therapy (Day 2 and Day 7). On Day 14
lymphoma xenografts were explanted for immunohistochemical analysis to correlate
PET findings with CD40 surface expression on tumor tissue. Results: Treatment
with HCD122 significantly delayed tumor growth resulting in a tumor growth
inhibition of 45% on Day 14. Significant reduction of tumor-to-background ratio
(TBR) of FLT-PET was seen in treated animals on Day 7 and preceded change of
tumor volume, thus predicting therapy response to HCD122. Immunohistochemical
analysis of xenografts revealed significantly higher CD40 expression on treated
than on untreated tissue. Moreover, we found a significant correlation between
CD40 expression and FLT-PET response for xenograft tumor treated with HCD122. Conclusions:
Treatment of DLBCL with the antagonistic CD40 antibody HCD122 can be monitored
with FLT-PET as early as seven days after commencement of therapy and seems to
increase CD40 expression on tumor tissue.