44/47 Scandium labelled cholecystokinin derivative for cancer theragnostics
Abstract
Author(s): Eun-ha Cho*, Jae-cheong Lim, So-young Lee, Ul-jae Park
The Cholecystokinin (CCK) receptors are known to overexpress in various types of tumors. Through a previous study, a cyclic CCK analogue, DOTA-[Nle]-cCCK, was confirmed to have high in vivo stability and the tumor target ability of DOTA-[Nle]-cCCK capable of binding to the CCK receptor was confirmed through Lu-177 labeling. In this study, DOTA-[Nle]-cCCK was labeled with the pair-isotope, Sc44/47, to confirm a technology that possibly could be applicable to radiopharmaceutical. First, we confirmed that the CCK receptor was overexpressed in AR42J, a cancer cell overexpressed in cancer tissue, and measured the binding ability of the receptor and DOTA-[Nle]-cCCK. We established the labeling method of radioactive scandium, and we confirmed that the Sc-44 labeled DOTA-[Nle]-cCCK administered to mice remained mostly in the bladder within an hour. Cell experiments with Sc-47 labeled DOTA-[Nle]-cCCK confirmed that more than half of the cancer cells were killed at a concentration of 5 MBq/ml. Through this study, we were able to confirm the diagnostic/therapeutic applicability of the DOTA-[Nle]-cCCK label with pair-isotope Sc-44/47.
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Editors List
-
S.SREEDHAR
Submitted PhD thesis in Biotechnology at GITAM University, Vizag.
-
Yousef Alomi
Yousef Alomi
The Past Head, General Administration of Pharmaceutical Care at Ministry of Health,
Saudi Arabia Critical Care/TPN
Clinical Pharmacist Ministry of Health,
Riyadh, Saudi Arabia. -
Osamu Tanaka
Osamu Tanaka
Assistant Professor,
Department of Radiation Oncology
Asahi University Hospital
Gifu city, Gifu, Japan -
Maher Abdel Fattah Al-Shayeb
Department of Surgical Sciences, Ajman University, UAE
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Andrzej Zdziennicki
Institute of Gynecology and Obstetrics, Medical University of Lodz, I Clinic of Gynecology and Gynecological Oncology (Lodz, Poland)
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