CXCR4-Directed PET/CT in Patients with Newly Diagnosed Neuroendocrine Carcinomas

Please always quote using this URN: urn:nbn:de:bvb:20-opus-234231
  • We aimed to elucidate the diagnostic potential of the C-X-C motif chemokine receptor 4 (CXCR4)-directed positron emission tomography (PET) tracer \(^{68}\)Ga-Pentixafor in patients with poorly differentiated neuroendocrine carcinomas (NEC), relative to the established reference standard \(^{18}\)F-FDG PET/computed tomography (CT). In our database, we retrospectively identified 11 treatment-naïve patients with histologically proven NEC, who underwent \(^{18}\)F-FDG and CXCR4-directed PET/CT for staging and therapy planning. The images wereWe aimed to elucidate the diagnostic potential of the C-X-C motif chemokine receptor 4 (CXCR4)-directed positron emission tomography (PET) tracer \(^{68}\)Ga-Pentixafor in patients with poorly differentiated neuroendocrine carcinomas (NEC), relative to the established reference standard \(^{18}\)F-FDG PET/computed tomography (CT). In our database, we retrospectively identified 11 treatment-naïve patients with histologically proven NEC, who underwent \(^{18}\)F-FDG and CXCR4-directed PET/CT for staging and therapy planning. The images were analyzed on a per-patient and per-lesion basis and compared to immunohistochemical staining (IHC) of CXCR4 from PET-guided biopsies. \(^{68}\)Ga-Pentixafor visualized tumor lesions in 10/11 subjects, while \(^{18}\)F-FDG revealed sites of disease in all 11 patients. Although weak to moderate CXCR4 expression could be corroborated by IHC in 10/11 cases, \(^{18}\)F-FDG PET/CT detected significantly more tumor lesions (102 vs. 42; total lesions, n = 107; p < 0.001). Semi-quantitative analysis revealed markedly higher 18F-FDG uptake as compared to \(^{68}\)Ga-Pentixafor (maximum and mean standardized uptake values (SUV) and tumor-to-background ratios (TBR) of cancerous lesions, SUVmax: 12.8 ± 9.8 vs. 5.2 ± 3.7; SUVmean: 7.4 ± 5.4 vs. 3.1 ± 3.2, p < 0.001; and, TBR 7.2 ± 7.9 vs. 3.4 ± 3.0, p < 0.001). Non-invasive imaging of CXCR4 expression in NEC is inferior to the reference standard \(^{18}\)F-FDG PET/CT.show moreshow less

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Author: Alexander Weich, Rudolf A. Werner, Andreas K. Buck, Philipp E. Hartrampf, Sebastian E. Serfling, Michael Scheurlen, Hans-Jürgen Wester, Alexander Meining, Stefan Kircher, Takahiro Higuchi, Martin G. Pomper, Steven P. Rowe, Constantin Lapa, Malte Kircher
URN:urn:nbn:de:bvb:20-opus-234231
Document Type:Journal article
Faculties:Medizinische Fakultät / Klinik und Poliklinik für Nuklearmedizin
Medizinische Fakultät / Pathologisches Institut
Medizinische Fakultät / Medizinische Klinik und Poliklinik I
Medizinische Fakultät / Deutsches Zentrum für Herzinsuffizienz (DZHI)
Language:English
Parent Title (English):Diagnostics
ISSN:2075-4418
Year of Completion:2021
Volume:11
Issue:4
Article Number:605
Source:Diagnostics 2021, 11(4), 605; https://doi.org/10.3390/diagnostics11040605
DOI:https://doi.org/10.3390/diagnostics11040605
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit
Tag:<sup>18</sup>F-FDG; <sup>68</sup>Ga-Pentixafor; CXCR4; NEC; NET
Release Date:2021/10/26
Date of first Publication:2021/03/29
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International