1
|
Shrestha UM, Chae HD, Fang Q, Lee RJ, Packiasamy J, Huynh L, Blecha J, Huynh TL, VanBrocklin HF, Levi J, Seo Y. A Feasibility Study of [ 18F]F-AraG Positron Emission Tomography (PET) for Cardiac Imaging-Myocardial Viability in Ischemia-Reperfusion Injury Model. Mol Imaging Biol 2024:10.1007/s11307-024-01932-y. [PMID: 39060882 DOI: 10.1007/s11307-024-01932-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 06/05/2024] [Accepted: 07/01/2024] [Indexed: 07/28/2024]
Abstract
PURPOSE Myocardial infarction (MI) with subsequent inflammation is one of the most common heart conditions leading to progressive tissue damage. A reliable imaging marker to assess tissue viability after MI would help determine the risks and benefits of any intervention. In this study, we investigate whether a new mitochondria-targeted imaging agent, 18F-labeled 2'-deoxy-2'-18F-fluoro-9-β-d-arabinofuranosylguanine ([18F]F-AraG), a positron emission tomography (PET) agent developed for imaging activated T cells, is suitable for cardiac imaging and to test the myocardial viability after MI. PROCEDURE To test whether the myocardial [18F]-F-AraG signal is coming from cardiomyocytes or immune infiltrates, we compared cardiac signal in wild-type (WT) mice with that of T cell deficient Rag1 knockout (Rag1 KO) mice. We assessed the effect of dietary nucleotides on myocardial [18F]F-AraG uptake in normal heart by comparing [18F]F-AraG signals between mice fed with purified diet and those fed with purified diet supplemented with nucleotides. The myocardial viability was investigated in rodent model by imaging rat with [18F]F-AraG and 2-deoxy-2[18F]fluoro-D-glucose ([18F]FDG) before and after MI. All PET signals were quantified in terms of the percent injected dose per cc (%ID/cc). We also explored [18F]FDG signal variability and potential T cell infiltration into fibrotic area in the affected myocardium with H&E analysis. RESULTS The difference in %ID/cc for Rag1 KO and WT mice was not significant (p = ns) indicating that the [18F]F-AraG signal in the myocardium was primarily coming from cardiomyocytes. No difference in myocardial uptake was observed between [18F]F-AraG signals in mice fed with purified diet and with purified diet supplemented with nucleotides (p = ns). The [18F]FDG signals showed wider variability at different time points. Noticeable [18F]F-AraG signals were observed in the affected MI regions. There were T cells in the fibrotic area in the H&E analysis, but they did not constitute the predominant infiltrates. CONCLUSIONS Our preliminary preclinical data show that [18F]F-AraG accumulates in cardiomyocytes indicating that it may be suitable for cardiac imaging and to evaluate the myocardial viability after MI.
Collapse
Affiliation(s)
- Uttam M Shrestha
- Department of Radiology and Biomedical Imaging, UCSF Physics Research Laboratory, University of California, 185 Berry Street, STE 350, San Francisco, CA, 94143, USA.
| | - Hee-Don Chae
- CellSight Technologies, Inc., 185 Berry Street, STE 350, San Francisco, CA, 94107, USA
| | - Qizhi Fang
- Department of Medicine, Cardiovascular Research Institute, University of California, San Francisco, CA, USA
| | - Randall J Lee
- Department of Medicine, Cardiovascular Research Institute, University of California, San Francisco, CA, USA
| | - Juliet Packiasamy
- CellSight Technologies, Inc., 185 Berry Street, STE 350, San Francisco, CA, 94107, USA
| | - Lyna Huynh
- CellSight Technologies, Inc., 185 Berry Street, STE 350, San Francisco, CA, 94107, USA
| | - Joseph Blecha
- Department of Radiology and Biomedical Imaging, UCSF Physics Research Laboratory, University of California, 185 Berry Street, STE 350, San Francisco, CA, 94143, USA
| | - Tony L Huynh
- Department of Radiology and Biomedical Imaging, UCSF Physics Research Laboratory, University of California, 185 Berry Street, STE 350, San Francisco, CA, 94143, USA
| | - Henry F VanBrocklin
- Department of Radiology and Biomedical Imaging, UCSF Physics Research Laboratory, University of California, 185 Berry Street, STE 350, San Francisco, CA, 94143, USA
| | - Jelena Levi
- CellSight Technologies, Inc., 185 Berry Street, STE 350, San Francisco, CA, 94107, USA.
| | - Youngho Seo
- Department of Radiology and Biomedical Imaging, UCSF Physics Research Laboratory, University of California, 185 Berry Street, STE 350, San Francisco, CA, 94143, USA
| |
Collapse
|
2
|
Kazakauskaite E, Vajauskas D, Bardauskiene L, Ordiene R, Zabiela V, Zaliaduonyte D, Gustiene O, Lapinskas T, Jurkevicius R. The incremental value of myocardial viability, evaluated by 18F-fluorodeoxyglucose positron emission tomography, and cardiovascular magnetic resonance for mortality prediction in patients with previous myocardial infarction and symptomatic heart failure. Perfusion 2023; 38:1288-1297. [PMID: 35503304 PMCID: PMC10466976 DOI: 10.1177/02676591221100739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 04/27/2022] [Indexed: 11/17/2022]
Abstract
OBJECTIVES To find the imaging mortality predictors in patients with previous myocardial infarction (MI), symptomatic heart failure (HF), and reduced left ventricle (LV) ejection fraction (EF). METHODS for the study 39 patients were selected prospectively with prior MI, symptomatic HF, and LVEF ≤40%. All patients underwent transthoracic echocardiography (TTE), single-photon emission computed tomography myocardial perfusion imaging (SPECT MPI), 18F-FDG positron emission tomography (FDG PET). 31 patients underwent cardiovascular magnetic resonance (CMR) with late gadolinium enhancement (LGE). Patients were divided into two groups: 1 group - cardiac death; 2 group - no cardiac death. Myocardial scars were assessed on a 5-point-scale. Follow-up data was obtained. RESULTS Imaging features disclosed significant difference (p < 0.05) of defect score (CMR and SPECT-PET), LV end-diastolic diameter (EDD) (TTE), LVEDD index (CMR), LV global longitudinal strain (CMR) and LV global circumferential strain (CMR) between the groups. Predictors of cardiac death were: LVEDD index (TTE) and LV global longitudinal strain. The cut-off values to predict cardiac death were: defect score (CMR) 25 (AUC, 79.5%; OR 1.8, 95% CI 1.2-2.7), SPECT-PET defect score 22 (AUC, 73.9%; OR 0.5, 95% CI 0.3-0.7), LVEDD (TTE) 58 mm (AUC, 88.4%; OR 23.6, 95% CI 2.6-217.7), LVEDDi 30 mm/m2 (TTE) (AUC, 73.6%; OR 22.0, 95% CI 1.9-251.5), LVEDDi 33.6 mm/m2 (CMR) (AUC, 73.6%; OR 22.0, 95% CI 1.9-251.5), LV global longitudinal strain -13.4 (AUC, 87.8%; OR 2.1, 95% CI 1.2-3.7) and LV global circumferential strain -16.3 (AUC, 76.1%; OR 1.9, 95% CI 1.2-3.0). CONCLUSIONS Imaging features, such as defect score (CMR) >25, SPECT-PET defect score >22, LVEDD (TTE) >58 mm, LVEDDi (TTE) >30 mm/m2, LVEDDi (CMR) >33.6 mm/m2, LV global longitudinal strain -13.4 and LV global circumferential strain -16.3, may increase sensitivity and specificity of FDG PET and LGE CMR predicting of late mortality.
Collapse
Affiliation(s)
- Egle Kazakauskaite
- Department of Cardiology, Lithuanian University of Health Sciences Hospital Kauno Klinikos, Lithuania
- Lithuanian University of Health Sciences, Lithuania
| | - Donatas Vajauskas
- Department of Cardiology, Lithuanian University of Health Sciences Hospital Kauno Klinikos, Lithuania
- Lithuanian University of Health Sciences, Lithuania
| | - Lina Bardauskiene
- Department of Cardiology, Lithuanian University of Health Sciences Hospital Kauno Klinikos, Lithuania
- Lithuanian University of Health Sciences, Lithuania
| | - Rasa Ordiene
- Department of Cardiology, Lithuanian University of Health Sciences Hospital Kauno Klinikos, Lithuania
- Lithuanian University of Health Sciences, Lithuania
| | - Vytautas Zabiela
- Department of Cardiology, Lithuanian University of Health Sciences Hospital Kauno Klinikos, Lithuania
- Lithuanian University of Health Sciences, Lithuania
| | - Diana Zaliaduonyte
- Department of Cardiology, Lithuanian University of Health Sciences Hospital Kauno Klinikos, Lithuania
- Lithuanian University of Health Sciences, Lithuania
| | - Olivija Gustiene
- Department of Cardiology, Lithuanian University of Health Sciences Hospital Kauno Klinikos, Lithuania
- Lithuanian University of Health Sciences, Lithuania
| | - Tomas Lapinskas
- Department of Cardiology, Lithuanian University of Health Sciences Hospital Kauno Klinikos, Lithuania
- Lithuanian University of Health Sciences, Lithuania
| | - Renaldas Jurkevicius
- Department of Cardiology, Lithuanian University of Health Sciences Hospital Kauno Klinikos, Lithuania
- Lithuanian University of Health Sciences, Lithuania
| |
Collapse
|