TY  - JOUR
A1  - Philipp-Abbrederis, Kathrin
A1  - Herrmann, Ken
A1  - Knop, Stefan
A1  - Schottelius, Margret
A1  - Eiber, Matthias
A1  - Lückerath, Katharina
A1  - Pietschmann, Elke
A1  - Habringer, Stefan
A1  - Gerngroß, Carlos
A1  - Franke, Katharina
A1  - Rudelius, Martina
A1  - Schirbel, Andreas
A1  - Lapa, Constantin
A1  - Schwamborn, Kristina
A1  - Steidle, Sabine
A1  - Hartmann, Elena
A1  - Rosenwald, Andreas
A1  - Kropf, Saskia
A1  - Beer, Ambros J
A1  - Peschel, Christian
A1  - Einsele, Hermann
A1  - Buck, Andreas K
A1  - Schwaiger, Markus
A1  - Götze, Katharina
A1  - Wester, Hans-Jürgen
A1  - Keller, Ulrich
T1  - In vivo molecular imaging of chemokine receptor CXCR4 expression in patients with advanced multiple myeloma
JF  - EMBO Molecular Medicine
N2  - CXCR4 is a G-protein-coupled receptor that mediates recruitment of blood cells toward its ligand SDF-1. In cancer, high CXCR4 expression is frequently associated with tumor dissemination andpoor prognosis. We evaluated the novel CXCR4 probe [\(^{68}\)Ga]Pentixafor for invivo mapping of CXCR4 expression density in mice xenografted with human CXCR4-positive MM cell lines and patients with advanced MM by means of positron emission tomography (PET). [\(^{68}\)Ga]Pentixafor PET provided images with excellent specificity and contrast. In 10 of 14 patients with advanced MM [\(^{68}\)Ga]Pentixafor PET/CT scans revealed MM manifestations, whereas only nine of 14 standard [\(^{18}\)F]fluorodeoxyglucose PET/CT scans were rated visually positive. Assessment of blood counts and standard CD34\(^{+}\) flow cytometry did not reveal significant blood count changes associated with tracer application. Based on these highly encouraging data on clinical PET imaging of CXCR4 expression in a cohort of MM patients, we conclude that [\(^{68}\)Ga]Pentixafor PET opens a broad field for clinical investigations on CXCR4 expression and for CXCR4-directed therapeutic approaches in MM and other diseases.
KW  - FDG PET/CT
KW  - cells
KW  - CXCR4/SDF-1
KW  - CXCR4
KW  - multiple myeloma
KW  - positron emission tomography
KW  - chemokine receptor
KW  - in vivo imaging
KW  - malignancies
KW  - involvement
KW  - microenvironment
KW  - survival
KW  - cancer
KW  - autologous transplantation
KW  - bone disease
Y1  - 2015
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-148738
VL  - 7
IS  - 4
ER  - 
TY  - JOUR
A1  - Bluemel, Christina
A1  - Linke, Fraenze
A1  - Herrmann, Ken
A1  - Simunovic, Iva
A1  - Eiber, Matthias
A1  - Kestler, Christian
A1  - Buck, Andreas K.
A1  - Schirbel, Andreas
A1  - Bley, Thorsten A.
A1  - Wester, Hans-Juergen
A1  - Vergho, Daniel
A1  - Becker, Axel
T1  - Impact of \(^{68}\)Ga-PSMA PET/CT on salvage radiotherapy planning in patients with prostate cancer and persisting PSA values or biochemical relapse after prostatectomy
JF  - EJNMMI Research
N2  - Background

Salvage radiotherapy (SRT) is clinically established in prostate cancer (PC) patients with PSA persistence or biochemical relapse (BCR) after prior radical surgery. PET/CT imaging prior to SRT may be performed to localize disease recurrence. The recently introduced \(^{68}\)Ga-PSMA outperforms other PET tracers for detection of recurrence and is therefore expected also to impact radiation planning.

Forty-five patients with PSA persistence (16 pts) or BCR (29 pts) after prior prostatectomy, scheduled to undergo SRT of the prostate bed, underwent \(^{68}\)Ga-PSMA PET/CT. The median PSA level was 0.67 ng/ml. The impact of \(^{68}\)Ga-PSMA PET/CT on the treatment decision was assessed. Patients with oligometastatic (≤5 lesions) PC underwent radiotherapy (RT), with the extent of the RT area and dose escalation being based on PET positivity.

Results

Suspicious lesions were detected in 24/45 (53.3 %) patients. In 62.5 % of patients, lesions were only detected by 68Ga-PSMA PET. Treatment was changed in 19/45 (42.2 %) patients, e.g., extending SRT to metastases (9/19), administering dose escalation in patients with morphological local recurrence (6/19), or replacing SRT by systemic therapy (2/19). 38/45 (84.4 %) followed the treatment recommendation, with data on clinical follow-up being available in 21 patients treated with SRT. All but one showed biochemical response (mean PSA decline 78 ± 19 %) within a mean follow-up of 8.12 ± 5.23 months.

Conclusions

\(^{68}\)Ga-PSMA PET/CT impacts treatment planning in more than 40 % of patients scheduled to undergo SRT. Future prospective studies are needed to confirm this significant therapeutic impact on patients prior to SRT.
KW  - prostate cancer
KW  - salvage radiotherapy
KW  - PSMA
KW  - PET/CT
KW  - recurrence
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-147798
VL  - 6
IS  - 78
ER  -