Pub Date : 2025-11-01DOI: 10.1016/j.nucmedbio.2025.109160
Madelyn Hallisey, Jacob Hooker, Joseph Downey
{"title":"A cGMP-Compliant Multi-Dose Synthesis of 6-[18F]Fluoro-L-m-tyrosine ([18F]FMT) on the Trasis AllInOne Synthesizer via an Orthogonal RP/Chiral HPLC Purification","authors":"Madelyn Hallisey, Jacob Hooker, Joseph Downey","doi":"10.1016/j.nucmedbio.2025.109160","DOIUrl":"10.1016/j.nucmedbio.2025.109160","url":null,"abstract":"","PeriodicalId":19363,"journal":{"name":"Nuclear medicine and biology","volume":"150 ","pages":"Article 109160"},"PeriodicalIF":3.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145473885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-01DOI: 10.1016/j.nucmedbio.2025.109190
Jenilee Woodfield, Melinda Wuest, Frank Wuest
{"title":"Ubiquitin-specific protease 14 (USP14): An emerging biomarker for molecular imaging of cancer.","authors":"Jenilee Woodfield, Melinda Wuest, Frank Wuest","doi":"10.1016/j.nucmedbio.2025.109190","DOIUrl":"10.1016/j.nucmedbio.2025.109190","url":null,"abstract":"","PeriodicalId":19363,"journal":{"name":"Nuclear medicine and biology","volume":"150 ","pages":"Article 109190"},"PeriodicalIF":3.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145474030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Translocator protein 18 kDa (TSPO) is a biomarker for neuroinflammation, and [18F]FEDAC was developed as a clinically usable radioligand for its imaging. Here, quantitative PET analyses of [18F]FEDAC in the brain of transient middle cerebral artery occlusion (tMCAO) rats were conducted for the first time.
Methods
Quantitative PET analysis was performed on rats subjected to tMCAO, with blood sampling also conducted as part of the study. To estimate the kinetic parameters of [18F]FEDAC, two-tissue compartment model (2TCM) and simplified reference tissue model (SRTM) analyses were conducted.
Results
The input rate (K1) and distribution volume (VT) (a macroparameter consisting of the K1–k4 rate constants from 2TCM analysis) of [18F]FEDAC in the ipsilateral area of tMCAO rats were 0.38 ± 0.19 mL/cm3/min and 5.4 ± 2.7 mL/cm3, respectively, which are roughly twice as high as those in the contralateral area. These results strongly suggest that ipsilateral binding potential (BPND), a quantitative index derived from the VT ratio with respect to the reference region, depends not only on the binding of [18F]FEDAC to TSPO, but also on increases in the input rate from blood. Therefore, in SRTM analyses, we corrected apparent BPND using R1, an index for probe delivery. In validation studies, SRTM analysis with the corrected BPND (corBPND), using the cerebellum as a reference, showed a high correlation with direct BPND (k3/k4) in 2TCM analyses.
Conclusion
The acquisition of quantitative PET images of TSPO distribution in the tMCAO rat brain was successfully achieved by scaling with corBPND.
{"title":"Estimation of the binding potential of the PET ligand [18F]FEDAC to translocator protein 18 kDa (TSPO) in the brain of experimental stroke model rats","authors":"Tomoteru Yamasaki , Yiding Zhang , Wakana Mori , Katsushi Kumata , Hidekatsu Wakizaka , Daisuke Arashi , Yusuke Kurihara , Masanao Ogawa , Nobuki Nengaki , Masayuki Fujinaga , Ming-Rong Zhang","doi":"10.1016/j.nucmedbio.2025.109579","DOIUrl":"10.1016/j.nucmedbio.2025.109579","url":null,"abstract":"<div><h3>Purpose</h3><div>Translocator protein 18 kDa (TSPO) is a biomarker for neuroinflammation, and [<sup>18</sup>F]FEDAC was developed as a clinically usable radioligand for its imaging. Here, quantitative PET analyses of [<sup>18</sup>F]FEDAC in the brain of transient middle cerebral artery occlusion (tMCAO) rats were conducted for the first time.</div></div><div><h3>Methods</h3><div>Quantitative PET analysis was performed on rats subjected to tMCAO, with blood sampling also conducted as part of the study. To estimate the kinetic parameters of [<sup>18</sup>F]FEDAC, two-tissue compartment model (2TCM) and simplified reference tissue model (SRTM) analyses were conducted.</div></div><div><h3>Results</h3><div>The input rate (<em>K</em><sub>1</sub>) and distribution volume (<em>V</em><sub>T</sub>) (a macroparameter consisting of the <em>K</em><sub>1</sub>–<em>k</em><sub>4</sub> rate constants from 2TCM analysis) of [<sup>18</sup>F]FEDAC in the ipsilateral area of tMCAO rats were 0.38 ± 0.19 mL/cm<sup>3</sup>/min and 5.4 ± 2.7 mL/cm<sup>3</sup>, respectively, which are roughly twice as high as those in the contralateral area. These results strongly suggest that ipsilateral binding potential (BP<sub>ND</sub>), a quantitative index derived from the <em>V</em><sub>T</sub> ratio with respect to the reference region, depends not only on the binding of [<sup>18</sup>F]FEDAC to TSPO, but also on increases in the input rate from blood. Therefore, in SRTM analyses, we corrected apparent BP<sub>ND</sub> using <em>R</em>1, an index for probe delivery. In validation studies, SRTM analysis with the corrected BP<sub>ND</sub> (corBP<sub>ND</sub>), using the cerebellum as a reference, showed a high correlation with direct BP<sub>ND</sub> (<em>k</em><sub>3</sub>/<em>k</em><sub>4</sub>) in 2TCM analyses.</div></div><div><h3>Conclusion</h3><div>The acquisition of quantitative PET images of TSPO distribution in the tMCAO rat brain was successfully achieved by scaling with corBP<sub>ND</sub>.</div></div>","PeriodicalId":19363,"journal":{"name":"Nuclear medicine and biology","volume":"150 ","pages":"Article 109579"},"PeriodicalIF":3.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145466618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Challenges in Pretargeted Imaging of Programmed Cell Death Ligand 1 (PD-L1) in Syngeneic Murine Models: In Vitro Studies with a Gallium-68-Labeled Tris(Hydroxypyridinone)-Tetrazine (THP-Tz) Tracer","authors":"Alessia Centanni , Daniel Hauken , Surachet Imlimthan , You-Cheng Khng , Outi Keinänen , Mirkka Sarparanta","doi":"10.1016/j.nucmedbio.2025.109112","DOIUrl":"10.1016/j.nucmedbio.2025.109112","url":null,"abstract":"","PeriodicalId":19363,"journal":{"name":"Nuclear medicine and biology","volume":"150 ","pages":"Article 109112"},"PeriodicalIF":3.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145473646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-01DOI: 10.1016/j.nucmedbio.2025.109105
Naresh Damuka , Bhuvanachandra Bhoopal , Mack Miller , Ivan Krizan , Krishna Gollapelli , Caleb Bradley , Samuel Lockhart , Akiva Mintz , Suzanne Craft , Kiran Solingapuram Sai
{"title":"A Pilot PET Imaging Study of Microtubule Dynamics in Older Adults with Cognitive Impairment","authors":"Naresh Damuka , Bhuvanachandra Bhoopal , Mack Miller , Ivan Krizan , Krishna Gollapelli , Caleb Bradley , Samuel Lockhart , Akiva Mintz , Suzanne Craft , Kiran Solingapuram Sai","doi":"10.1016/j.nucmedbio.2025.109105","DOIUrl":"10.1016/j.nucmedbio.2025.109105","url":null,"abstract":"","PeriodicalId":19363,"journal":{"name":"Nuclear medicine and biology","volume":"150 ","pages":"Article 109105"},"PeriodicalIF":3.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145473728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-01DOI: 10.1016/j.nucmedbio.2025.109166
Yani Berckmans , Roxanne Wouters , Zeljka Raskovic-Lovre , Sara van Mechelen , Kim Lindland , Tina Bønsdorff , An Coosemans , Frederik Cleeren
{"title":"Targeted Alpha Therapy of Ovarian Cancer with ²¹²Pb-Labeled Anti-PTK7 Antibody: Efficient Production at Non-Clinical Scale and Preclinical Insights","authors":"Yani Berckmans , Roxanne Wouters , Zeljka Raskovic-Lovre , Sara van Mechelen , Kim Lindland , Tina Bønsdorff , An Coosemans , Frederik Cleeren","doi":"10.1016/j.nucmedbio.2025.109166","DOIUrl":"10.1016/j.nucmedbio.2025.109166","url":null,"abstract":"","PeriodicalId":19363,"journal":{"name":"Nuclear medicine and biology","volume":"150 ","pages":"Article 109166"},"PeriodicalIF":3.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145473815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}