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Wang H, Wen L, Wei H, Song Y, Song W, Li M, Lan X, Cai W, Jiang D. Liver-specific delivery of spherical DNA frameworks for alleviation of hepatic ischemic reperfusion injury. J Nanobiotechnology 2024; 22:394. [PMID: 38965594 PMCID: PMC11223400 DOI: 10.1186/s12951-024-02661-8] [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: 12/31/2023] [Accepted: 06/24/2024] [Indexed: 07/06/2024] Open
Abstract
DNA nanostructures have long been developed for biomedical purposes, but their controlled delivery in vivo proposes a major challenge for disease theranostics. We previously reported that DNA nanostructures on the scales of tens and hundreds nanometers showed preferential renal excretion or kidney retention, allowing for sensitive evaluation and effective protection of kidney function, in response to events such as unilateral ureter obstruction or acute kidney injury. Encouraged by the positive results, we redirected our focus to the liver, specifically targeting organs noticeably lacking DNA materials, to explore the interaction between DNA nanostructures and the liver. Through PET imaging, we identified SDF and M13 as DNA nanostructures exhibiting significant accumulation in the liver among numerous candidates. Initially, we investigated and assessed their biodistribution, toxicity, and immunogenicity in healthy mice, establishing the structure-function relationship of DNA nanostructures in the normal murine. Subsequently, we employed a mouse model of liver ischemia-reperfusion injury (IRI) to validate the nano-bio interactions of SDF and M13 under more challenging pathological conditions. M13 not only exacerbated hepatic oxidative injury but also elevated local apoptosis levels. In contrast, SDF demonstrated remarkable ability to scavenge oxidative responses in the liver, thereby mitigating hepatocyte injury. These compelling results underscore the potential of SDF as a promising therapeutic agent for liver-related conditions. This aimed to elucidate their roles and mechanisms in liver injury, providing a new perspective for the biomedical applications of DNA nanostructures.
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Affiliation(s)
- Hao Wang
- Department of Nuclear Medicine, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Ave, Wuhan, 430022, China
- Hubei Key Laboratory of Molecular Imaging, 1277 Jiefang Ave, Wuhan, 430022, China
- Key Laboratory of Biological Targeted Therapy, Ministry of Education, 1277 Jiefang Ave, Wuhan, 430022, China
| | - Li Wen
- Department of Nuclear Medicine, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Ave, Wuhan, 430022, China
- Hubei Key Laboratory of Molecular Imaging, 1277 Jiefang Ave, Wuhan, 430022, China
- Key Laboratory of Biological Targeted Therapy, Ministry of Education, 1277 Jiefang Ave, Wuhan, 430022, China
| | - Hao Wei
- Department of Nuclear Medicine, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Ave, Wuhan, 430022, China
- Hubei Key Laboratory of Molecular Imaging, 1277 Jiefang Ave, Wuhan, 430022, China
- Key Laboratory of Biological Targeted Therapy, Ministry of Education, 1277 Jiefang Ave, Wuhan, 430022, China
| | - Yangmeihui Song
- Department of Nuclear Medicine, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Ave, Wuhan, 430022, China
- Hubei Key Laboratory of Molecular Imaging, 1277 Jiefang Ave, Wuhan, 430022, China
- Key Laboratory of Biological Targeted Therapy, Ministry of Education, 1277 Jiefang Ave, Wuhan, 430022, China
| | - Wenyu Song
- Department of Nuclear Medicine, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Ave, Wuhan, 430022, China
- Departments of Radiology and Medical Physics, Madison, WI, 53705, USA
- Hubei Key Laboratory of Molecular Imaging, 1277 Jiefang Ave, Wuhan, 430022, China
- Key Laboratory of Biological Targeted Therapy, Ministry of Education, 1277 Jiefang Ave, Wuhan, 430022, China
| | - Mengting Li
- Department of Nuclear Medicine, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Ave, Wuhan, 430022, China
- Hubei Key Laboratory of Molecular Imaging, 1277 Jiefang Ave, Wuhan, 430022, China
- Key Laboratory of Biological Targeted Therapy, Ministry of Education, 1277 Jiefang Ave, Wuhan, 430022, China
| | - Xiaoli Lan
- Department of Nuclear Medicine, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Ave, Wuhan, 430022, China.
- Hubei Key Laboratory of Molecular Imaging, 1277 Jiefang Ave, Wuhan, 430022, China.
- Key Laboratory of Biological Targeted Therapy, Ministry of Education, 1277 Jiefang Ave, Wuhan, 430022, China.
| | - Weibo Cai
- Departments of Radiology and Medical Physics, Madison, WI, 53705, USA.
- , 600 Highland Ave, K6/562, Madison, WI, 53792, USA.
| | - Dawei Jiang
- Department of Nuclear Medicine, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Ave, Wuhan, 430022, China.
- Hubei Key Laboratory of Molecular Imaging, 1277 Jiefang Ave, Wuhan, 430022, China.
- Key Laboratory of Biological Targeted Therapy, Ministry of Education, 1277 Jiefang Ave, Wuhan, 430022, China.
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Lu X, Zhou X, Song B, Zhang H, Cheng M, Zhu X, Wu Y, Shi H, Chu B, He Y, Wang H, Hong J. Framework Nucleic Acids Combined with 3D Hybridization Chain Reaction Amplifiers for Monitoring Multiple Human Tear Cytokines. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2400622. [PMID: 38489844 DOI: 10.1002/adma.202400622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 03/04/2024] [Indexed: 03/17/2024]
Abstract
Existing tear sensors are difficult to perform multiplexed assays due to the minute amounts of biomolecules in tears and the tiny volume of tears. Herein, the authors leverage DNA tetrahedral frameworks (DTFs) modified on the wireless portable electrodes to effectively capture 3D hybridization chain reaction (HCR) amplifiers for automatic and sensitive monitoring of multiple cytokines in human tears. The developed sensors allow the sensitive determination of various dry eye syndrome (DES)-associated cytokines in human tears with the limit of detection down to 0.1 pg mL-1, consuming as little as 3 mL of tear fluid. Double-blind testing of clinical DES samples using the developed sensor and commercial ELISA shows no significant difference between them. Compared with single-biomarker diagnosis, the diagnostic accuracy of this sensor based on multiple biomarkers has improved by ≈16%. The developed system offers the potential for tear sensors to enable personalized and accurate diagnosis of various ocular diseases.
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Affiliation(s)
- Xing Lu
- Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano & Soft Materials & Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University, Suzhou, 215123, China
| | - Xujiao Zhou
- Department of Ophthalmology and Vision Science, Shanghai Eye, Ear, Nose and Throat Hospital, Fudan University, Shanghai, 200031, China
| | - Bin Song
- Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano & Soft Materials & Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University, Suzhou, 215123, China
| | - Hong Zhang
- Department of Ophthalmology and Vision Science, Shanghai Eye, Ear, Nose and Throat Hospital, Fudan University, Shanghai, 200031, China
| | - Mingrui Cheng
- Department of Ophthalmology and Vision Science, Shanghai Eye, Ear, Nose and Throat Hospital, Fudan University, Shanghai, 200031, China
| | - Xingyu Zhu
- Department of Ophthalmology and Vision Science, Shanghai Eye, Ear, Nose and Throat Hospital, Fudan University, Shanghai, 200031, China
| | - Yuqi Wu
- Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano & Soft Materials & Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University, Suzhou, 215123, China
| | - Haoliang Shi
- Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano & Soft Materials & Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University, Suzhou, 215123, China
| | - Binbin Chu
- Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano & Soft Materials & Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University, Suzhou, 215123, China
| | - Yao He
- Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano & Soft Materials & Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University, Suzhou, 215123, China
- Macao Translatoinal Medicine Center, Macau University of Science and Technology, Taipa, Macau SAR, 999078, China
- Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa, Macau SAR, 999078, China
| | - Houyu Wang
- Suzhou Key Laboratory of Nanotechnology and Biomedicine, Institute of Functional Nano & Soft Materials & Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Soochow University, Suzhou, 215123, China
| | - Jiaxu Hong
- Department of Ophthalmology and Vision Science, Shanghai Eye, Ear, Nose and Throat Hospital, Fudan University, Shanghai, 200031, China
- Shanghai Engineering Research Center of Synthetic Immunology, Shanghai, 200032, China
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3
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Li P, Huang Z, Duan X, Wang T, Yang S, Jiang D, Li J. PET image-guided kidney injury theranostics enabled by a bipyramidal DNA framework. Biomater Sci 2024; 12:2086-2095. [PMID: 38439626 DOI: 10.1039/d3bm01575k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
Understanding the pharmacokinetic profiles of nanomaterials in living organisms is essential for their application in disease treatment. Bipyramidal DNA frameworks (BDFs) are a type of DNA nanomaterial that have shown prospects in the fields of molecular imaging and therapy. To serve as a reference for disease-related studies involving the BDF, we constructed a 68Ga-BDF and employed positron emission tomography (PET) imaging to establish its pharmacokinetic model in healthy mice. Our investigation revealed that the BDF was primarily eliminated from the body via the urinary system. Ureteral obstruction could significantly alter the metabolism of the urinary system. By utilizing the established pharmacokinetic model, we sensitively observed distinct imaging indicators in unilateral ureteral obstruction and acute kidney injury (a complication of ureteral obstruction) mouse models. Furthermore, we observed that the BDF showed therapeutic effects in an AKI model. We believe that the established pharmacokinetic model and unique renal excretion characteristics of the BDF will provide researchers with more information for studying kidney diseases.
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Affiliation(s)
- Pinghui Li
- Inner Mongolia Medical University, Hohhot 010050, China
| | - Zhidie Huang
- Inner Mongolia Medical University, Hohhot 010050, China
| | - Xiaoyan Duan
- Department of Nuclear Medicine, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China.
- Inner Mongolia Key Laboratory of Molecular Imaging, Hohhot 010050, China
| | - Tao Wang
- Department of Nuclear Medicine, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China.
- Inner Mongolia Key Laboratory of Molecular Imaging, Hohhot 010050, China
| | - Shaowen Yang
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan 430022, China
| | - Dawei Jiang
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
- Hubei Province Key Laboratory of Molecular Imaging, Wuhan 430022, China
| | - Jianbo Li
- Department of Nuclear Medicine, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China.
- Inner Mongolia Key Laboratory of Molecular Imaging, Hohhot 010050, China
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4
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Jiang D, Wei W. Molecular imaging for better theranostics. Eur J Nucl Med Mol Imaging 2023; 50:3799-3801. [PMID: 37646834 DOI: 10.1007/s00259-023-06415-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Affiliation(s)
- Dawei Jiang
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Ave., Wuhan, 430022, China.
- Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China.
- Key Laboratory of Biological Targeted Therapy, the Ministry of Education, Wuhan, 430022, China.
| | - Weijun Wei
- Department of Nuclear Medicine, Institute of Clinical Nuclear Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China.
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5
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Liu D, Chen X, Jiang D, Wang C, Xia Q, Yang Y. Structural Properties and Surface Modification Decided Pharmacokinetic Behavior and Bio-Distribution of DNA Origami Frameworks in Mice. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2302932. [PMID: 37264740 DOI: 10.1002/smll.202302932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/08/2023] [Indexed: 06/03/2023]
Abstract
This study establishes and validates a series of three dimentional (3D) DNA origami frameworks (DOFs) carrying imaging probes to evaluate their pharmacokinetics and real-time bio-distribution in mice. Three typical DOFs with distinguished structural properties are subjected to mice intravenous injection to systematically investigate their in vivo behaviors. Tracing the radioisotope zirconium-89 (89 Zr) trapped at the inner space of the frameworks, positron emission tomography (PET) imaging is employed to record the real-time bio-distribution of the structures and acquire their pharmacokinetic parameters in the major metabolic organs. The 3D DOFs show different behavior compared to previous structures, with lower kidney accumulation and higher liver retention. Modifications to the structures, such as exposed ssDNA or polyethylene glycol (PEG) moieties, impact their behavior, but are structure-dependent. The 43 nm icosahedra framework among the DOFs perform the best in liver targeting, with the ssDNA extensions enhancing this tendency. The modification of triantennary N-acetylgalactosamine (GalNAc), further improves its uptake in liver cells, especially in hepatocytes over other cell types, discovered by flow cytometry analysis.
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Affiliation(s)
- Dunfang Liu
- Institute of Molecular Medicine and Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine, State Key Laboratory of Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
- Department of Nuclear Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Xiao Chen
- Institute of Molecular Medicine and Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine, State Key Laboratory of Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Dawei Jiang
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology and Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China
| | - Cheng Wang
- Department of Nuclear Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Qian Xia
- Institute of Molecular Medicine and Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine, State Key Laboratory of Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
- Department of Nuclear Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Yang Yang
- Institute of Molecular Medicine and Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine, State Key Laboratory of Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
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6
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Han LT, Sun GG, Ruan LS, Li X. Structured Aptamers: A Flourishing Nanomaterial for Tumor Targeting. J Biomed Nanotechnol 2022. [DOI: 10.1166/jbn.2022.3407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Structured aptamers are nucleic acid systems produced using DNA nano self-assembly technology and can be constructed in a programmable manner. These aptamers are widely used in biomedical fields because of their low biological toxicity, weak immunogenicity, good cytocompatibility and
biocompatibility, stability, and facile modification ability. Additionally, structured aptamers achieve nano precision in spatial configuration and can be directly internalized into targets without the assistance of transfection reagents. They exhibit higher stability, rigidity, and binding
efficiency than aptamers alone. Therefore, structured aptamers have been universally applied in the tumor-targeting field and have emerged as a current research hotspot. Here, we introduce the assembly principle, assembly methods, and characterization methods of structured aptamers. Moreover,
the application status of structured aptamers for tumor detection and targeted therapy is summarized to provide new research directions for early diagnosis and drug research in the field of oncology.
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Affiliation(s)
- Li-Ting Han
- Department of Gynaecology 2, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Ge-Ge Sun
- Department of Gynaecology 2, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Luo-Shan Ruan
- Department of Gynaecology 2, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Xin Li
- Department of Gynaecology 2, Renmin Hospital of Wuhan University, Wuhan, 430060, China
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Zheng J, Wang Q, Shi L, Shi L, Li T. Calcium-Differentiated Cellular Internalization of Allosteric Framework Nucleic Acids for Targeted Payload Delivery. Anal Chem 2022; 94:9097-9105. [PMID: 35709364 DOI: 10.1021/acs.analchem.2c01434] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Target delivery systems have extensively shown promising applications in cancer therapy, and many of them function smartly by responding to the cancer cell microenvironment. Here, we for the first time report Ca2+-differentiated cellular internalization of 2D/3D framework nucleic acids (FNAs), enabling the engineering of a conceptually new target delivery system using an allosteric FNA nanovehicle. The FNA vehicle is subject to a 2D-to-3D transformation on the cancer cell surface via G-quadruplexes responding to environmental K+ and thereby allows its cell entry to be more efficiently promoted by Ca2+. This design enables the FNA vehicle to target cancer cells and selectively deliver an antisense strand-containing cargo for live-cell mRNA imaging. It would open new avenues toward targeted drug delivery and find extensive applications in precise disease treatment.
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Affiliation(s)
- Jiao Zheng
- Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Qiwei Wang
- Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Lin Shi
- Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Lili Shi
- Department of Chemistry, Anhui University, 111 Jiulong Road, Hefei, Anhui 230601, China
| | - Tao Li
- Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
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Zhou K, Mei Z, Lei Y, Guan Z, Mao C, Li Y. Boosted Productivity in Single-Tile-Based DNA Polyhedra Assembly by Simple Cation Replacement. Chembiochem 2022; 23:e202200138. [PMID: 35676202 DOI: 10.1002/cbic.202200138] [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: 03/10/2022] [Revised: 06/08/2022] [Indexed: 11/11/2022]
Abstract
Cations such as divalent magnesium ion (Mg2+ ) play an essential role in DNA self-assembly. However, the strong electrostatic shielding effect of Mg2+ would be disadvantageous in some situations that require relatively weak interactions to allow a highly reversible error-correcting mechanism in the process of assembly. Herein, by substituting the conventional divalent Mg2+ with monovalent sodium ion (Na+ ), we have achieved one-pot high-yield assembly of tile-based DNA polyhedra at micromolar concentration of tiles, at least 10 times higher than the DNA concentrations reported previously. This strategy takes advantage of coexisting counterions and is expected to surmount the major obstacle to potential applications of such DNA nanostructures: large-scale production.
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Affiliation(s)
- Kaixuan Zhou
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Zhichao Mei
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Yunxiang Lei
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Zhen Guan
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
| | - Chengde Mao
- Department of Chemistry, Purdue University, West Lafayette, Indiana, 47907, USA
| | - Yulin Li
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, Anhui, 230009, P. R. China
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9
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Advances in aptamer-based nuclear imaging. Eur J Nucl Med Mol Imaging 2022; 49:2544-2559. [PMID: 35394153 DOI: 10.1007/s00259-022-05782-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 03/26/2022] [Indexed: 01/12/2023]
Abstract
Aptamers are short oligonucleotides that bind to specific target molecules. They have been extensively explored in biomedical applications, including biosensing, medical imaging, and disease treatment. Their adjustable affinity for specific biomarkers stimulates more translational efforts, such as nuclear imaging of tumors in preclinical and clinical settings. In this review, we present recent advances of aptamer-based nuclear imaging and compare aptamer tracers with other biogenic probes in forms of peptides, nanobodies, monoclonal antibodies, and antibody fragments. Fundamental properties of aptamer-based radiotracers are highlighted and potential directions to improve aptamer's imaging performance are discussed. Despite many translational obstacles to overcome, we envision aptamers to be a versatile tool for cancer nuclear imaging in the near future.
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