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@ARTICLE{Smeets:276748,
author = {E. M. M. Smeets and D. N. Dorst and G. M. Franssen and M.
S. van Essen and C. Frielink and M. W. J. Stommel and M.
Trajkovic-Arsic$^*$ and P. F. Cheung$^*$ and J. Siveke$^*$
and I. Wilson and A. Mascioni and E. H. J. G. Aarntzen and
S. A. M. van Lith},
title = {{F}ibroblast {A}ctivation {P}rotein-{T}argeting
{M}inibody-{IRD}ye700{DX} for {A}blation of the
{C}ancer-{A}ssociated {F}ibroblast with {P}hotodynamic
{T}herapy},
journal = {Cells},
volume = {12},
number = {10},
issn = {2073-4409},
address = {Basel},
publisher = {MDPI},
reportid = {DKFZ-2023-01129},
pages = {1420},
year = {2023},
abstract = {Fibroblast activation protein (FAP), expressed on
cancer-associated fibroblasts, is a target for diagnosis and
therapy in multiple tumour types. Strategies to systemically
deplete FAP-expressing cells show efficacy; however, these
induce toxicities, as FAP-expressing cells are found in
normal tissues. FAP-targeted photodynamic therapy offers a
solution, as it acts only locally and upon activation. Here,
a FAP-binding minibody was conjugated to the chelator
diethylenetriaminepentaacetic acid (DTPA) and the
photosensitizer IRDye700DX (DTPA-700DX-MB). DTPA-700DX-MB
showed efficient binding to FAP-overexpressing 3T3 murine
fibroblasts (3T3-FAP) and induced the protein’s
dose-dependent cytotoxicity upon light exposure.
Biodistribution of DTPA-700DX-MB in mice carrying either
subcutaneous or orthotopic tumours of murine pancreatic
ductal adenocarcinoma cells (PDAC299) showed maximal tumour
uptake of 111In-labelled DTPA-700DX-MB at 24 h post
injection. Co-injection with an excess DTPA-700DX-MB reduced
uptake, and autoradiography correlated with FAP expression
in the stromal tumour region. Finally, in vivo therapeutic
efficacy was determined in two simultaneous subcutaneous
PDAC299 tumours; only one was treated with 690 nm light.
Upregulation of an apoptosis marker was only observed in the
treated tumours. In conclusion, DTPA-700DX-MB binds to
FAP-expressing cells and targets PDAC299 tumours in mice
with good signal-to-background ratios. Furthermore, the
induced apoptosis indicates the feasibility of targeted
depletion of FAP-expressing cells with photodynamic
therapy.},
cin = {ED01},
ddc = {570},
cid = {I:(DE-He78)ED01-20160331},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
typ = {PUB:(DE-HGF)16},
doi = {10.3390/cells12101420},
url = {https://inrepo02.dkfz.de/record/276748},
}