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Synthesis and preclinical evaluation of 68Ga-PSMA-BCH for prostate cancer imaging. 2019

Teli Liu, and Chen Liu, and Fei Liu, and Xiaoxia Xu, and Xiaoyi Guo, and Lei Xia, and Hua Zhu, and Zhi Yang
Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Nuclear Medicine, Peking University Cancer Hospital & Institute, Beijing 100142, PR China.

Prostate specific membrane antigen (PSMA) is a promising target for the diagnosis and therapy of prostate cancer. In this report, a NOTA-conjugated precursor, NOTA-PSMA (also named PSMA-BCH), was synthesized by peptide synthesizer with the chemical purity over 95%. 68Ga-PSMA-BCH was obtained by radiolabeling NOTA-PSMA with 68GaCl3 with >99% radiochemical purity and 59-74 GBq/μmol specific activity. In vitro and in vivo study of 68Ga-PSMA-BCH showed high stability, high uptake in PSMA-expressing cells and tumor, fast clearance and low non-target uptake. 22Rv1 tumors were clearly observed in micro-PET images of and showed good retention. Compared with 68Ga-PSMA-617, 68Ga-PSMA-BCH showed comparable tumor uptake and tumor-background ratios. Indicating 68Ga-PSMA-BCH is a promising candidate for prostate cancer imaging and worthy of further clinical investigations.

UI MeSH Term Description Entries
D008297 Male Males
D008807 Mice, Inbred BALB C An inbred strain of mouse that is widely used in IMMUNOLOGY studies and cancer research. BALB C Mice, Inbred,BALB C Mouse, Inbred,Inbred BALB C Mice,Inbred BALB C Mouse,Mice, BALB C,Mouse, BALB C,Mouse, Inbred BALB C,BALB C Mice,BALB C Mouse
D008819 Mice, Nude Mutant mice homozygous for the recessive gene "nude" which fail to develop a thymus. They are useful in tumor studies and studies on immune responses. Athymic Mice,Mice, Athymic,Nude Mice,Mouse, Athymic,Mouse, Nude,Athymic Mouse,Nude Mouse
D009374 Neoplasms, Experimental Experimentally induced new abnormal growth of TISSUES in animals to provide models for studying human neoplasms. Experimental Neoplasms,Experimental Neoplasm,Neoplasm, Experimental
D011471 Prostatic Neoplasms Tumors or cancer of the PROSTATE. Cancer of Prostate,Prostate Cancer,Cancer of the Prostate,Neoplasms, Prostate,Neoplasms, Prostatic,Prostate Neoplasms,Prostatic Cancer,Cancer, Prostate,Cancer, Prostatic,Cancers, Prostate,Cancers, Prostatic,Neoplasm, Prostate,Neoplasm, Prostatic,Prostate Cancers,Prostate Neoplasm,Prostatic Cancers,Prostatic Neoplasm
D005708 Gallium A rare, metallic element designated by the symbol, Ga, atomic number 31, and atomic weight 69.72.
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D015394 Molecular Structure The location of the atoms, groups or ions relative to one another in a molecule, as well as the number, type and location of covalent bonds. Structure, Molecular,Molecular Structures,Structures, Molecular
D045744 Cell Line, Tumor A cell line derived from cultured tumor cells. Tumor Cell Line,Cell Lines, Tumor,Line, Tumor Cell,Lines, Tumor Cell,Tumor Cell Lines

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