Synthesis and characterisation of DOTA-kisspeptin-10 as a potential gallium-68/lutetium-177 pan-tumour radiopharmaceutical.

IF 3.3 4区医学 Q2 ENDOCRINOLOGY & METABOLISM Journal of Neuroendocrinology Pub Date : 2025-01-07 DOI:10.1111/jne.13487

Janke Kleynhans, Robert Reeve, Cathryn H S Driver, Biljana Marjanovic-Painter, Mike Sathekge, Jan Rijn Zeevaart, Thomas Ebenhan, Robert P Millar

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Abstract

Kisspeptin (KISS1) and its cognate receptor (KISS1R) are implicated in the progression of various cancers. A gallium-68 labelled kisspeptin-10 (KP10), the minimal biologically active structure, has potential as a pan-tumour radiopharmaceutical for the detection of cancers. Furthermore, a lutetium-177 labelled KP10 could find therapeutic application in treating oncological diseases. DOTA (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) was attached to the NH2-terminus of KP10 as we posited from our previous publications that this modification would not impair biological activity. Here, we showed that the biological activity, as monitored by stimulation of inositol phosphate accumulation in HEK293 transfected with the KISS1R gene, was indeed similar for KP10 and DOTA-KP10. The optimisation of radiolabelling with gallium-68 and lutetium-177 is described. Stability in serum, plasma and whole blood was also investigated. Pharmacokinetics and biodistribution were established with micro-PET/CT (positron emission tomography/computerised tomography) and ex vivo measurements. Dynamic studies with micro-PET/CT demonstrated that background clearance for the radiopharmaceutical was rapid with a blood half-life of 18 ± 3 min. DOTA-KP10 demonstrated preserved functionality at KISS1R and good blood clearance. These results lay the foundation for the further development of DOTA-KP10 analogues that have high binding affinity along with proteolytic resistance.

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来源期刊

Journal of Neuroendocrinology 医学-内分泌学与代谢

CiteScore

6.40

自引率

6.20%

发文量

137

审稿时长

4-8 weeks

期刊介绍： Journal of Neuroendocrinology provides the principal international focus for the newest ideas in classical neuroendocrinology and its expanding interface with the regulation of behavioural, cognitive, developmental, degenerative and metabolic processes. Through the rapid publication of original manuscripts and provocative review articles, it provides essential reading for basic scientists and clinicians researching in this rapidly expanding field. In determining content, the primary considerations are excellence, relevance and novelty. While Journal of Neuroendocrinology reflects the broad scientific and clinical interests of the BSN membership, the editorial team, led by Professor Julian Mercer, ensures that the journal’s ethos, authorship, content and purpose are those expected of a leading international publication.