68 Ga-FAP-2286 PET of Solid Tumors: Biodistribution, Dosimetry, and Comparison with 18 F-FDG.

Autor: Kline B; Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, California., Yadav S; Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, California., Seo Y; Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, California., Ippisch RC; Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, California., Castillo J; Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, California., Aggarwal RR; Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, California., Kelley RK; Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, California., Behr SC; Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, California., Flavell RR; Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, California.; Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, California., Lawhn-Heath C; Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, California., Melisko M; Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, California., Rugo HS; Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, California., Wang V; Helen Diller Comprehensive Cancer Center, University of California San Francisco, San Francisco, California., Yom SS; Department of Radiation Oncology, University of California San Francisco, San Francisco, California., Ha P; Department of Otolaryngology-Head and Neck Surgery, University of California San Francisco, San Francisco, California; and., Jiang F; Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California., Hope TA; Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, California; thomas.hope@ucsf.edu.
Jazyk: angličtina
Zdroj: Journal of nuclear medicine : official publication, Society of Nuclear Medicine [J Nucl Med] 2024 Jun 03; Vol. 65 (6), pp. 938-943. Date of Electronic Publication: 2024 Jun 03.
DOI: 10.2967/jnumed.123.267281
Abstrakt: Fibroblast activation protein (FAP), expressed in the tumor microenvironment of a variety of cancers, has become a target of novel PET tracers. The purpose of this report is to evaluate the imaging characteristics of 68 Ga-FAP-2286, present the first-to our knowledge-dosimetry analysis to date, and compare the agent with 18 F-FDG and FAPI compounds. Methods: Patients were administered 219 ± 43 MBq of 68 Ga-FAP-2286 and scanned after 60 min. Uptake was measured in up to 5 lesions per patient and within the kidneys, spleen, liver, and mediastinum (blood pool). Absorbed doses were evaluated using MIM Encore and OLINDA/EXM version 1.1 using the International Commission on Radiological Protection publication 103 tissue weighting factor. Results: Forty-six patients were imaged with 68 Ga-FAP-2286 PET. The highest average uptake was seen in sarcoma, cholangiocarcinoma, and colon cancer. The lowest uptake was found in lung cancer and testicular cancer. The average SUV max was significantly higher on 68 Ga-FAP-2286 PET than on 18 F-FDG PET in cholangiocarcinoma (18.2 ± 6.4 vs. 9.1 ± 5.0, P = 0.007), breast cancer (11.1 ± 6.8 vs. 4.1 ± 2.2, P < 0.001), colon cancer (13.8 ± 2.2 vs. 7.6 ± 1.7, P = 0.001), hepatocellular carcinoma (9.3 ± 3.5 vs. 4.7 ± 1.3, P = 0.01), head and neck cancer (11.3 ± 3.5 vs. 7.6 ± 5.5, P = 0.04), and pancreatic adenocarcinoma (7.4 ± 1.8 vs. 3.7 ± 1.0, P = 0.01). The total-body effective dose was estimated at 1.16E-02 mSv/MBq, with the greatest absorbed organ dose in the urinary bladder wall (9.98E-02 mGy/MBq). Conclusion: 68 Ga-FAP-2286 biodistribution, dosimetry, and tumor uptake were similar to those of previously reported FAPI compounds. Additionally, 68 Ga-FAP-2286 PET had consistently higher uptake than 18 F-FDG PET. These results are especially promising in the setting of small-volume disease and differentiating tumor from inflammatory uptake.
(© 2024 by the Society of Nuclear Medicine and Molecular Imaging.)
Databáze: MEDLINE