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Li J, Hong X, Chen Y, Yin B, Yang H, Shi C, Zeng X, Zhang D, Guo Z, Zhang X. MicroPET Imaging of Riboflavin Transporter 3 Expression in Myocardial Infarction/Reperfusion Rat Models with Radiofluorinated Riboflavin. ACS Pharmacol Transl Sci 2024; 7:2350-2357. [PMID: 39144563 PMCID: PMC11320726 DOI: 10.1021/acsptsci.4c00175] [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: 03/27/2024] [Revised: 07/15/2024] [Accepted: 07/16/2024] [Indexed: 08/16/2024]
Abstract
Riboflavin transporter 3 (RFVT3) represents a potential cardioprotective biotarget in energetic metabolism reprogramming after myocardial infarction/reperfusion (MI/R). This study investigated the feasibility of noninvasive real-time quantification of RFVT3 expression after MI/R with an radiolabeled probe 18F-RFTA in a preclinical rat model of MI/R. The tracer 18F-RFTA was radio-synthesized manually and characterized on the subjects of radiolabeling yield, radiochemical purity, and stability in vivo. MI/R and sham-operated rat models were confirmed by cardiac magnetic resonance imaging (cMRI) and single-photon-emission computed tomography (SPECT) myocardial perfusion imaging (MPI) with technetium-99m sestamibi (99mTc-MIBI). Positron emission tomography (PET) imaging of MI/R and sham-operated rat models were conducted with 18F-RFTA. Ex vivo autoradiography and RFVT3 immunohistochemical (IHC) staining were conducted to verify the RFVT3 expression in infarcted and normal myocardium. 18F-RFTA injection was prepared with high radiochemical purity (>95%) and kept stable in vitro and in vivo. 18F-RFTA PET revealed significant uptake in the infarcted myocardium at 8 h after reperfusion, as confirmed by lower 99mTc-MIBI perfusion and decreased intensity of cMRI. Conversely, there were only the tiniest uptakes in the normal myocardium and blocked infarcted myocardium, which was further corroborated by ex vivo autoradiography. The RFVT3 expression was further confirmed by IHC staining in the infarcted and normal myocardium. We first demonstrate the feasibility of imaging RFVT3 in infarcted myocardium. 18F-RFTA is an encouraging PET probe for imaging cardioprotective biotarget RFVT3 in mitochondrial energetic metabolism reprogramming after myocardial infarction. Noninvasive imaging of cardioprotective biotarget RFVT3 has potential value in the diagnosis and therapy of patients with MI.
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Affiliation(s)
- Jindian Li
- Department
of Nuclear Medicine, Fudan University Shanghai Cancer Center, Department
of Oncology, Shanghai Medical College, Fudan
University, Shanghai 200032, China
- Center
for Molecular Imaging and Translational Medicine, State Key Laboratory
of Molecular Vaccinology and Molecular Diagnostics, School of Public
Health, Xiamen University, Xiamen 361102, China
| | - Xingfang Hong
- Laboratory
of Pathogen Biology, School of Basic Medical Sciences, Dali University, Dali 671000, China
| | - Yingxi Chen
- Center
for Molecular Imaging and Translational Medicine, State Key Laboratory
of Molecular Vaccinology and Molecular Diagnostics, School of Public
Health, Xiamen University, Xiamen 361102, China
| | - Bin Yin
- The
First Affiliated Hospital, Center of Burn & Plastic and Wound
Healing Surgery, Hengyang Medical School, University of South China, Hengyang 421001, China
| | - Hongzhang Yang
- Center
for Molecular Imaging and Translational Medicine, State Key Laboratory
of Molecular Vaccinology and Molecular Diagnostics, School of Public
Health, Xiamen University, Xiamen 361102, China
| | - Changrong Shi
- Center
for Molecular Imaging and Translational Medicine, State Key Laboratory
of Molecular Vaccinology and Molecular Diagnostics, School of Public
Health, Xiamen University, Xiamen 361102, China
| | - Xinying Zeng
- Center
for Molecular Imaging and Translational Medicine, State Key Laboratory
of Molecular Vaccinology and Molecular Diagnostics, School of Public
Health, Xiamen University, Xiamen 361102, China
| | - Deliang Zhang
- Department
of Nuclear Medicine, Xiang’an Hospital
Affiliated to Xiamen University, Xiamen 361102, China
| | - Zhide Guo
- Center
for Molecular Imaging and Translational Medicine, State Key Laboratory
of Molecular Vaccinology and Molecular Diagnostics, School of Public
Health, Xiamen University, Xiamen 361102, China
| | - Xianzhong Zhang
- Department
of Nuclear Medicine, Peking Union Medical College Hospital & Theranostics
and Translational Research Center, National Infrastructures for Translational
Medicine, Institute of Clinical Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
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Chen Q, Zhang S, Liu W, Sun X, Luo Y, Sun X. Application of emerging technologies in ischemic stroke: from clinical study to basic research. Front Neurol 2024; 15:1400469. [PMID: 38915803 PMCID: PMC11194379 DOI: 10.3389/fneur.2024.1400469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 05/24/2024] [Indexed: 06/26/2024] Open
Abstract
Stroke is a primary cause of noncommunicable disease-related death and disability worldwide. The most common form, ischemic stroke, is increasing in incidence resulting in a significant burden on patients and society. Urgent action is thus needed to address preventable risk factors and improve treatment methods. This review examines emerging technologies used in the management of ischemic stroke, including neuroimaging, regenerative medicine, biology, and nanomedicine, highlighting their benefits, clinical applications, and limitations. Additionally, we suggest strategies for technological development for the prevention, diagnosis, and treatment of ischemic stroke.
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Affiliation(s)
- Qiuyan Chen
- Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Beijing, China
- Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
| | - Shuxia Zhang
- Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Beijing, China
- Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
| | - Wenxiu Liu
- Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Beijing, China
- Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
| | - Xiao Sun
- Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Beijing, China
- Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
| | - Yun Luo
- Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Beijing, China
- Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
| | - Xiaobo Sun
- Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Beijing, China
- Key Laboratory of Bioactive Substances and Resource Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
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3
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Liu T, Wang Y, Zhang M, Zhang J, Kang N, Zheng L, Ding Z. The Optimization Design of Macrophage Membrane Camouflaging Liposomes for Alleviating Ischemic Stroke Injury through Intranasal Delivery. Int J Mol Sci 2024; 25:2927. [PMID: 38474179 DOI: 10.3390/ijms25052927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 02/24/2024] [Accepted: 02/26/2024] [Indexed: 03/14/2024] Open
Abstract
Ischemic stroke is associated with a high mortality rate, and effective treatment strategies are currently lacking. In this study, we aimed to develop a novel nano delivery system to treat ischemic stroke via intranasal administration. A three-factor Box-Behnken experimental design was used to optimize the formulation of liposomes co-loaded with Panax notoginseng saponins (PNSs) and Ginsenoside Rg3 (Rg3) (Lip-Rg3/PNS). Macrophage membranes were coated onto the surface of the optimized liposomes to target the ischemic site of the brain. The double-loaded liposomes disguised by macrophage membranes (MM-Lip-Rg3/PNS) were spherical, in a "shell-core" structure, with encapsulation rates of 81.41% (PNS) and 93.81% (Rg3), and showed good stability. In vitro, MM-Lip-Rg3/PNS was taken up by brain endothelial cells via the clathrin-dependent endocytosis and micropinocytosis pathways. Network pharmacology experiments predicted that MM-Lip-Rg3/PNS could regulate multiple signaling pathways and treat ischemic stroke by reducing apoptosis and inflammatory responses. After 14 days of treatment with MM-Lip-Rg3/PNS, the survival rate, weight, and neurological score of middle cerebral artery occlusion (MCAO) rats significantly improved. The hematoxylin and eosin (H&E) and TUNEL staining results showed that MM-Lip-Rg3/PNS can reduce neuronal apoptosis and inflammatory cell infiltration and protect the ischemic brain. In vivo biological experiments have shown that free Rg3, PNS, and MM-Lip-Rg3/PNS can alleviate inflammation and apoptosis, especially MM-Lip-Rg3/PNS, indicating that biomimetic liposomes can improve the therapeutic effects of drugs. Overall, MM-Lip-Rg3/PNS is a potential biomimetic nano targeted formulation for ischemic stroke therapy.
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Affiliation(s)
- Tianshu Liu
- School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China
| | - Yan Wang
- School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China
| | - Mengfan Zhang
- School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China
| | - Jin Zhang
- School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China
| | - Naijin Kang
- School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China
| | - Linlin Zheng
- School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China
| | - Zhiying Ding
- School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China
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Li J, Zhang X. Development of radiotracers for riboflavin transporter 3 imaging in diseases-A brief overview. J Labelled Comp Radiopharm 2024; 67:77-81. [PMID: 38131157 DOI: 10.1002/jlcr.4076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 10/08/2023] [Accepted: 11/08/2023] [Indexed: 12/23/2023]
Abstract
Riboflavin (RF, vitamin B2) plays a key role in metabolic oxidation-reduction reactions, especially in the mitochondrial reprogramming of energy metabolism. Riboflavin transporter 3 (RFVT3) is a vital section of the mitochondrial network and involved in riboflavin homeostasis and production of adenosine triphosphate (ATP). The abnormal expression of RFVT3 is closely associated with the occurrence and progression of multiple diseases. Therefore, it is vital to understand the riboflavin internalization pathway under pathological conditions by addressing the abnormal expression of RFVT3, which could be a highly valuable biomarker for the early diagnosis and effective therapy of various diseases.
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Affiliation(s)
- Jindian Li
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Shanghai, China
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xianzhong Zhang
- Department of Nuclear Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Theranostics and Translational Research Center, Institute of Clinical Medicine, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
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Yang Y, Ma M, Shen L, An J, Kim E, Liu H, Jin M, Wang S, Zhang J, Kim JS, Yin C. A Fluorescent Probe for Investigating the Role of Biothiols in Signaling Pathways Associated with Cerebral Ischemia-Reperfusion Injury. Angew Chem Int Ed Engl 2023; 62:e202310408. [PMID: 37584948 DOI: 10.1002/anie.202310408] [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: 07/20/2023] [Revised: 08/11/2023] [Accepted: 08/15/2023] [Indexed: 08/17/2023]
Abstract
Cerebral ischemia-reperfusion injury (CIRI) is intimately associated with the redox regulation of biothiol, a crucial antioxidant marker that precludes the onset of ROS. We designed a novel fluorescent probe, DCI-Ac-Py, showing various physicochemical properties, such as high selectivity, exceptional signal-to-noise ratio, near-infrared (NIR) optical window, and blood-brain barrier (BBB) penetrability, for detecting biothiols in the brain. The picolinate serves as a specific recognition group that is rapidly activated by biothiol and undergoes nucleophilic substitution with the adjacent acrylic ester to yield the desired NIR probe. Additionally, the probe's lipid solubility is improved through the inclusion of halogen atoms, which aids in penetrating the BBB. Using DCI-Ac-Py, we investigated changes of biothiols in vivo in the brains of mice during CIRI. We found that biothiol-mediated NF-kB classical (P65-related) and nonclassical (RelB-related) pathways contribute to abundant ROS production induced by CIRI and that biothiols are involved in redox regulation. These findings provide new insights into the study of CIRI and shed light on the physiological and pathological mechanisms of biothiols in the brain.
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Affiliation(s)
- Yutao Yang
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, P. R. China
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, 030006, China
| | - Ming Ma
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, P. R. China
| | - Lei Shen
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, P. R. China
| | - Jusung An
- Department of Chemistry, Korea University, Seoul, 02841, Korea
| | - Eunji Kim
- Department of Chemistry, Korea University, Seoul, 02841, Korea
| | - Hongmei Liu
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, P. R. China
| | - Ming Jin
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, P. R. China
| | - Shuxiang Wang
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, P. R. China
| | - Jinchao Zhang
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, P. R. China
| | - Jong Seung Kim
- Department of Chemistry, Korea University, Seoul, 02841, Korea
| | - Caixia Yin
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, 030006, China
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Pontes PB, Toscano AE, Lacerda DC, da Silva Araújo ER, Costa PCTD, Alves SM, Brito Alves JLD, Manhães-de-Castro R. Effectiveness of Polyphenols on Perinatal Brain Damage: A Systematic Review of Preclinical Studies. Foods 2023; 12:2278. [PMID: 37372488 DOI: 10.3390/foods12122278] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 04/06/2023] [Accepted: 05/24/2023] [Indexed: 06/29/2023] Open
Abstract
Polyphenol supplementation during early life has been associated with a reduction of oxidative stress and neuroinflammation in diseases caused by oxygen deprivation, including cerebral palsy, hydrocephaly, blindness, and deafness. Evidence has shown that perinatal polyphenols supplementation may alleviate brain injury in embryonic, fetal, neonatal, and offspring subjects, highlighting its role in modulating adaptative responses involving phenotypical plasticity. Therefore, it is reasonable to infer that the administration of polyphenols during the early life period may be considered a potential intervention to modulate the inflammatory and oxidative stress that cause impairments in locomotion, cognitive, and behavioral functions throughout life. The beneficial effects of polyphenols are linked with several mechanisms, including epigenetic alterations, involving the AMP-activated protein kinase (AMPK), nuclear factor kappa B (NF-κB), and phosphoinositide 3-kinase (PI3K) pathways. To highlight these new perspectives, the objective of this systematic review was to summarize the understanding emerging from preclinical studies about polyphenol supplementation, its capacity to minimize brain injury caused by hypoxia-ischemia in terms of morphological, inflammatory, and oxidative parameters and its repercussions for motor and behavioral functions.
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Affiliation(s)
- Paula Brielle Pontes
- Postgraduate Program of Neuropsychiatry and Behavioral Sciences, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
- Studies in Nutrition and Phenotypic Plasticity Unit, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
| | - Ana Elisa Toscano
- Studies in Nutrition and Phenotypic Plasticity Unit, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
- Department of Nursing, CAV, Federal University of Pernambuco, Vitória de Santo Antão 55608-680, Pernambuco, Brazil
| | - Diego Cabral Lacerda
- Studies in Nutrition and Phenotypic Plasticity Unit, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
- Department of Nursing, CAV, Federal University of Pernambuco, Vitória de Santo Antão 55608-680, Pernambuco, Brazil
| | - Eulália Rebeca da Silva Araújo
- Postgraduate Program of Neuropsychiatry and Behavioral Sciences, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
- Studies in Nutrition and Phenotypic Plasticity Unit, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
| | - Paulo César Trindade da Costa
- Department of Nutrition, Health Sciences Center, Federal University of Paraíba, João Pessoa 58051-900, Paraíba, Brazil
| | - Swane Miranda Alves
- Postgraduate Program of Neuropsychiatry and Behavioral Sciences, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
- Studies in Nutrition and Phenotypic Plasticity Unit, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
| | - José Luiz de Brito Alves
- Department of Nutrition, Health Sciences Center, Federal University of Paraíba, João Pessoa 58051-900, Paraíba, Brazil
| | - Raul Manhães-de-Castro
- Postgraduate Program of Neuropsychiatry and Behavioral Sciences, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
- Studies in Nutrition and Phenotypic Plasticity Unit, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
- Department of Nutrition, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil
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Future Prospective of Radiopharmaceuticals from Natural Compounds Using Iodine Radioisotopes as Theranostic Agents. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27228009. [PMID: 36432107 PMCID: PMC9694974 DOI: 10.3390/molecules27228009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 11/06/2022] [Accepted: 11/11/2022] [Indexed: 11/19/2022]
Abstract
Natural compounds provide precursors with various pharmacological activities and play an important role in discovering new chemical entities, including radiopharmaceuticals. In the development of new radiopharmaceuticals, iodine radioisotopes are widely used and interact with complex compounds including natural products. However, the development of radiopharmaceuticals from natural compounds with iodine radioisotopes has not been widely explored. This review summarizes the development of radiopharmaceuticals from natural compounds using iodine radioisotopes in the last 10 years, as well as discusses the challenges and strategies to improve future discovery of radiopharmaceuticals from natural resources. Literature research was conducted via PubMed, from which 32 research articles related to the development of natural compounds labeled with iodine radioisotopes were reported. From the literature, the challenges in developing radiopharmaceuticals from natural compounds were the purity and biodistribution. Despite the challenges, the development of radiopharmaceuticals from natural compounds is a golden opportunity for nuclear medicine advancement.
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Li J, Valkenburgh JV, Fang J, Zhang D, Chen Y, Chen Q, Jia G, Chen AZ, Zhang X, Chen K. Development of a novel radiofluorinated riboflavin probe for riboflavin receptor-targeting PET imaging. Pharmacol Res 2022; 183:106395. [PMID: 35970328 DOI: 10.1016/j.phrs.2022.106395] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/10/2022] [Accepted: 08/10/2022] [Indexed: 11/19/2022]
Abstract
Riboflavin receptor 3 (RFVT3) is a key protein in energetic metabolism reprogramming and is overexpressed in multiple cancers involved in malignant proliferation, angiogenesis, chemotherapy resistance, and immunosuppression. To enable non-invasive real-time quantification of RFVT3 in tumors, we sought to develop a suitable PET probe that would allow specific and selective RFVT3 imaging in vivo. A novel radiofluorinated riboflavin probe (18F-RFTA) based on riboflavin was synthesized and characterized in terms of radiochemical purity, hydrophilicity, binding affinity, and stability. Positron emission tomography (PET) imaging of 18F-RFTA was performed in U87MG tumor-bearing mice. Immunohistochemistry staining was carried out to determine the expression of RFVT3 in U87MG tumors. 18F-RFTA was characterized by high radiochemical purity and RFVT3 binding affinity, and remarkable stability in vitro and in vivo. Small-animal PET imaging with 18F-RFTA revealed significantly higher uptake in RFVT3-expressing U87MG tumors than in muscle. In conclusion, we have developed the first radiofluorinated riboflavin-based PET probe that is suitable for imaging RFVT3-positive tumors. The new target/probe system can be leveraged for extensive use in the diagnosis and treatment of RFVT3 overexpressing diseases, such as oncologic, cardiovascular, and neurodegenerative diseases.
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Affiliation(s)
- Jindian Li
- Department of Radiology, Keck School of Medicine, University of Southern California, 2250 Alcazar Street, CSC-135D, Los Angeles, CA 90033, USA; Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen 361102, China
| | - Juno Van Valkenburgh
- Department of Radiology, Keck School of Medicine, University of Southern California, 2250 Alcazar Street, CSC-135D, Los Angeles, CA 90033, USA
| | - Jianyang Fang
- Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen 361102, China
| | - Deliang Zhang
- Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen 361102, China
| | - Yingxi Chen
- Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen 361102, China
| | - Quan Chen
- Department of Radiology, Keck School of Medicine, University of Southern California, 2250 Alcazar Street, CSC-135D, Los Angeles, CA 90033, USA
| | - Guorong Jia
- Department of Radiology, Keck School of Medicine, University of Southern California, 2250 Alcazar Street, CSC-135D, Los Angeles, CA 90033, USA
| | - Austin Z Chen
- Department of Radiology, Keck School of Medicine, University of Southern California, 2250 Alcazar Street, CSC-135D, Los Angeles, CA 90033, USA
| | - Xianzhong Zhang
- Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen 361102, China.
| | - Kai Chen
- Department of Radiology, Keck School of Medicine, University of Southern California, 2250 Alcazar Street, CSC-135D, Los Angeles, CA 90033, USA.
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