TY  - JOUR
A1  - Giesel, Frederik L.
A1  - Kratochwil, Clemens
A1  - Schlittenhardt, Joel
A1  - Dendl, Katharina
A1  - Eiber, Matthias
A1  - Staudinger, Fabian
A1  - Kessler, Lukas
A1  - Fendler, Wolfgang P.
A1  - Lindner, Thomas
A1  - Koerber, Stefan A.
A1  - Cardinale, Jens
A1  - Sennung, David
A1  - Roehrich, Manuel
A1  - Debus, Juergen
A1  - Sathekge, Mike
A1  - Haberkorn, Uwe
A1  - Calais, Jeremie
A1  - Serfling, Sebastian
A1  - Buck, Andreas L.
T1  - Head-to-head intra-individual comparison of biodistribution and tumor uptake of \(^{68}\)Ga-FAPI and \(^{18}\)F-FDG PET/CT in cancer patients
JF  - European Journal of Nuclear Medicine and Molecular Imaging
N2  - Purpose
FAPI ligands (fibroblast activation protein inhibitor), a novel class of radiotracers for PET/CT imaging, demonstrated in previous studies rapid and high tumor uptake. The purpose of this study is the head-to-head intra-individual comparison of \(^{68}\)Ga-FAPI versus standard-of-care \(^{18}\)F-FDG in PET/CT in organ biodistribution and tumor uptake in patients with various cancers.

Material and Methods
This international retrospective multicenter analysis included PET/CT data from 71 patients from 6 centers who underwent both \(^{68}\)Ga-FAPI and \(^{18}\)F-FDG PET/CT within a median time interval of 10 days (range 1–89 days). Volumes of interest (VOIs) were manually drawn in normal organs and tumor lesions to quantify tracer uptake by SUVmax and SUVmean. Furthermore, tumor-to-background ratios (TBR) were generated (SUVmax tumor/ SUVmax organ).

Results
A total of 71 patients were studied of, which 28 were female and 43 male (median age 60). In 41 of 71 patients, the primary tumor was present. Forty-three of 71 patients exhibited 162 metastatic lesions. \(^{68}\)Ga-FAPI uptake in primary tumors and metastases was comparable to 18F-FDG in most cases. The SUVmax was significantly lower for \(^{68}\)Ga-FAPI than \(^{18}\)F-FDG in background tissues such as the brain, oral mucosa, myocardium, blood pool, liver, pancreas, and colon. Thus, \(^{68}\)Ga-FAPI TBRs were significantly higher than 18F-FDG TBRs in some sites, including liver and bone metastases.

Conclusion
Quantitative tumor uptake is comparable between \(^{68}\)Ga-FAPI and \(^{18}\)F-FDG, but lower background uptake in most normal organs results in equal or higher TBRs for \(^{68}\)Ga-FAPI. Thus, \(^{68}\)Ga-FAPI PET/CT may yield improved diagnostic information in various cancers and especially in tumor locations with high physiological \(^{18}\)F-FDG uptake.
KW  - FAPI PET/CT
KW  - FDG PET/CT
KW  - cancer-associated fibroblast
KW  - various cancer diseases
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-307252
SN  - 1619-7070
SN  - 1619-7089
VL  - 48
IS  - 13
ER  - 
TY  - JOUR
A1  - Jungwirth, Gerhard
A1  - Yu, Tao
A1  - Moustafa, Mahmoud
A1  - Rapp, Carmen
A1  - Warta, Rolf
A1  - Jungk, Christine
A1  - Sahm, Felix
A1  - Dettling, Steffen
A1  - Zweckberger, Klaus
A1  - Lamszus, Katrin
A1  - Senft, Christian
A1  - Loehr, Mario
A1  - Keßler, Almuth F.
A1  - Ketter, Ralf
A1  - Westphal, Manfred
A1  - Debus, Juergen
A1  - von Deimling, Andreas
A1  - Simon, Matthias
A1  - Unterberg, Andreas
A1  - Abdollahi, Amir
A1  - Herold-Mende, Christel
T1  - Identification of KIF11 as a Novel Target in Meningioma
JF  - Cancers
N2  - Kinesins play an important role in many physiological functions including intracellular vesicle transport and mitosis. The emerging role of kinesins in different cancers led us to investigate the expression and functional role of kinesins in meningioma. Therefore, we re-analyzed our previous microarray dataset of benign, atypical, and anaplastic meningiomas (n = 62) and got evidence for differential expression of five kinesins (KIFC1, KIF4A, KIF11, KIF14 and KIF20A). Further validation in an extended study sample (n = 208) revealed a significant upregulation of these genes in WHO°I to °III meningiomas (WHO°I n = 61, WHO°II n = 88, and WHO°III n = 59), which was most pronounced in clinically more aggressive tumors of the same WHO grade. Immunohistochemical staining confirmed a WHO grade-associated upregulated protein expression in meningioma tissues. Furthermore, high mRNA expression levels of KIFC1, KIF11, KIF14 and KIF20A were associated with shorter progression-free survival. On a functional level, knockdown of kinesins in Ben-Men-1 cells and in the newly established anaplastic meningioma cell line NCH93 resulted in a significantly inhibited tumor cell proliferation upon siRNA-mediated downregulation of KIF11 in both cell lines by up to 95% and 71%, respectively. Taken together, in this study we were able to identify the prognostic and functional role of several kinesin family members of which KIF11 exhibits the most promising properties as a novel prognostic marker and therapeutic target, which may offer new treatment options for aggressive meningiomas.
KW  - meningioma
KW  - KIF
KW  - kinesin
KW  - KIF11
KW  - NCH93
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-197402
SN  - 2072-6694
VL  - 11
IS  - 4
ER  -