Armacokinetic profile. Translation in two advanced BC individuals, resulted in no unwanted effects, confirming prior observations around the biosafety of radiotracers depending on the potent GRPR-antagonist [DPhe6 ,LeuNHEt13 ]BBN(6-13) and on GRPR-antagonist radioligands generally. Furthermore, it revealed the potential of [99m Tc]Tc-DB15 to detect various metastatic BC lesions, each in the skeleton and in soft tissues, but these findings really need to be confirmed prospectively inside a committed human study. In view from the above, further clinical evaluation seems to become warranted to establish the diagnostic worth of [99m Tc]Tc-DB15 in BC, Computer, as well as other GRPR-expressing human malignancies.Supplementary Supplies: The following are offered on the net at https://www.mdpi.com/article/ ten.3390/cancers13205093/s1, Figure S1: Typical radiochromatogram of HPLC evaluation of [99m Tc]TcDB15 (preclinical); Figure S2: Standard radiochromatogram of HPLC analysis of [99m Tc]Tc-DB15 (for individuals); Figure S3: Entire body scan three h pi of [99m Tc]Tc-DB15 in patient 1 (with anterior and posterior projection); Figure S4: PET/CT 1 h pi of [18 F]FDG in patient 1; Table S1: Numerical biodistribution data for [99m Tc]Tc-DB15 in PC-3 xenograft-bearing SCID mice at 1, 4 and 24 h pi; Table S2: Numerical biodistribution data for [99m Tc]Tc-DB15 in T-47D xenograft-bearing SCID mice at 1, 4 and 24 h pi.Cancers 2021, 13,12 ofAuthor Contributions: Conceptualization, B.A.N., R.M. and T.M.; methodology, B.A.N., A.K., P.K., B.J., B.B., D.I. and T.M.; validation, B.A.N., R.M., R.C., D.I. and T.M.; investigation, B.A.N., A.K., P.K., B.J., B.B., R.C., D.I. and T.M.; sources, R.M., R.C. and T.M.; information curation, P.K., R.M., R.C. and T.M.; writing–original draft preparation, T.M.; writing–review and editing, all co-authors; supervision, B.A.N., R.M., R.C. and T.M.; project administration, R.M., R.C. and T.M.; funding acquisition, R.M., R.C. and T.M. All authors have study and agreed towards the published version with the manuscript. Funding: The preclinical study was co-financed by Greece along with the European Union (European Regional Development Fund) via the project “NCSRD–INRASTES research activities inside the framework in the national RIS3” (MIS 5002559), implemented beneath the “Action for the Strategic Improvement on the Investigation and Technological Sector”, funded by the Operational System “Competitiveness, Entrepreneurship and Innovation” (NSRF 2014-2020). Further help was provided by Siemens AG by way of the project stablishing a Multidisciplinary and Successful Innovation and Entrepreneurship Hub(E-11928). The preparation of your radioligand for the patient study was supported by the CERAD project, financed under Clever Development Operational Program 2014020, Priority IV, Measure four.two. POIR.04.02.004-A001/16. The clinical part of the study obtained economic support in the Poznan University of Health-related Sciences (grant No. 502-14-22213550-41147). Institutional Assessment Board Statement: The animal and patient research were 7-Ethoxyresorufin Protocol conducted based on the guidelines with the Declaration of Helsinki. The animal protocols were authorized by the Department of GS-626510 Epigenetic Reader Domain Agriculture and Veterinary Service in the Prefecture of Athens (protocol numbers #1609 for the stability and #1610 for the biodistribution research, each issued on 11 April 2018). The patient study protocol was approved by the Bioethical Committee on the Poznan University of Healthcare Sciences (choice no. 1153 issued on 16 January 2020). Informed Consent Statement: Patients gave th.