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Hong Z, Xu H, Ni K, Yang Y, Deng S. Effect of Cyclosporin H on ischemic injury and neutrophil infiltration in cerebral infarct model of rats via PET imaging. Ann Nucl Med 2024; 38:337-349. [PMID: 38360964 DOI: 10.1007/s12149-024-01900-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 01/03/2024] [Indexed: 02/17/2024]
Abstract
BACKGROUND Brain ischemia-reperfusion injury is a complex process, and neuroinflammation is an important secondary contributing pathological event. Neutrophils play major roles in ischemic neuroinflammation. Once activated, neutrophils express formyl peptide receptors (FPRs), which are special receptors of a class of chemoattractants and may be potential targets to regulate the activity of neutrophils and control cerebral ischemic injury. This study was aimed to explore the ameliorating effect of Cyclosporin H (CsH), a potent FPR antagonist, on brain ischemic injury by inhibiting the activation and migration of neutrophils, and improving cerebral blood flow. METHODS We employed a middle cerebral artery occlusion (MCAO) Model on rats and performed behavioral, morphological, and microPET imaging assays to investigate the potential restoring efficacy of CsH on cerebral ischemic damages. Peptide N-cinnamoyl-F-(D)L-F-(D)L-F (cFLFLF), an antagonist to the neutrophil FPR with a high binding affinity, was used for imaging neutrophil distribution. RESULTS We found that CsH had similar effect with edaravone on improving the neurobehavioral deficient symptoms after cerebral ischemia-reperfusion, and treatment with CsH also alleviated ischemic cerebral infarction. Compared with the MCAO Model group, [18F]FDG uptake ratios of the CsH and edaravone treatment groups were significantly higher. The CsH-treated groups also showed significant increases in [18F]FDG uptake at 144 h when compared with that of 24 h. This result indicates that like edaravone, treatment with both doses of CsH promoted the recovery of blood supply after cerebral ischemic event. Moreover, MCAO-induced cerebral ischemia significantly increased the radiouptake of [68Ga]Ga-cFLFLF at 72 h after ischemia-reperfusion operation. Compared with MCAO Model group, radiouptake values of [68Ga]-cFLFLF in both doses of CsH and edaravone groups were all decreased significantly. These results showed that both doses of CsH resulted in a similar therapeutic effect with edaravone on inhibiting neutrophil infiltration in cerebral infarction. CONCLUSION Potent FPR antagonist CsH is promisingly beneficial in attenuating neuroinflammation and improving neurobehavioral function against cerebral infarction. Therefore, FPR may become a novel target for regulating neuroinflammation and improving prognosis for ischemic cerebrovascular disorders.
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Affiliation(s)
- Zhihui Hong
- Department of Nuclear Medicine, The Second Affiliated Hospital of Soochow University, Suzhou, 215002, China
- State Key Laboratory of Radiation Medicine and Protection, Soochow University, Suzhou, 215123, China
- NHC Key Laboratory of Nuclear Medicine and Jiangsu Key Laboratory of Molecular Nuclear Medicine, Wuxi, 214063, China
| | - Hong Xu
- Department of Oncology, Changshu Hospital Affiliated to Soochow University, Changzhou No. 1 People's Hospital, Suzhou, 215006, China
| | - Kairu Ni
- Department of Nuclear Medicine, The Second Affiliated Hospital of Soochow University, Suzhou, 215002, China
| | - Yi Yang
- Department of Nuclear Medicine, Suzhou Science and Technology Town Hospital, Suzhou, 215153, China.
| | - Shengming Deng
- Department of Nuclear Medicine, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China.
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Pan X, Zhu J, Xu Z, Xiao Q, Zhou X, Xu K, Li C, Jiang Y, Wang Y, Xue Z, Lei P, He Y. 68Ga-WRWWWW Is a Potential Positron Emission Tomography Probe for Imaging Inflammatory Diseases by Targeting Formyl Peptide Receptor 2. Mol Pharm 2022; 19:1368-1377. [PMID: 35393860 DOI: 10.1021/acs.molpharmaceut.1c00922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Inflammation plays a significant role in many physiological and pathological processes. Molecular imaging could provide functional as well as anatomical information for visualizing various inflammatory diseases. Advancements in imaging tracers for inflammation would improve the accuracy of diagnosis and monitoring, thus facilitating patient care. The positron emission tomography (PET) imaging tracer, 68Ga-labeled antagonist peptide Trp-Arg-Trp-Trp-Trp-Trp (WRWWWW, WRW4), targets formyl peptide receptor 2 (FPR2), which is in turn widely distributed in a variety of tissues and is associated with many inflammatory diseases. In the current study, we aimed to investigate the potential of 68Ga-WRW4 for detecting and monitoring inflammatory lesions in mice. We established an inflammation mouse model by the intramuscular injection of turpentine oil into the left thigh. WRW4 was labeled with 68Ga with an overall radiochemical yield >90% and radiochemical purity >99%. 68Ga-WRW4 uptake in inflamed muscle peaked on day 2 (1.14 ± 0.01 percentage of the injected dose per gram of tissue (%ID/g)) and the uptake ratio of inflammatory/normal muscle also reached a maximum (12.36 ± 2.35). Strong PET signals were detected in the left thigh at 60 min after the injection of 68Ga-WRW4 in experimental mice, but weak or no signals were detected in mice in the blocking and control groups. 68Ga-WRW4 uptake was in agreement with the dynamics of immune cell infiltration during the inflammatory reaction. These results suggest that 68Ga-WRW4 is a promising PET tracer suitable for the noninvasive detection of FPR2 expression and for monitoring inflammatory activity in inflammation-bearing mice.
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Affiliation(s)
- Xin Pan
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei Province 430071, China
| | - Jiaxu Zhu
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei Province 430071, China
| | - Zhuoshuo Xu
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China
| | - Qin Xiao
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei Province 430071, China
| | - Xiaoqi Zhou
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China
| | - Kui Xu
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei Province 430071, China
| | - Chongjiao Li
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei Province 430071, China
| | - Yaqun Jiang
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei Province 430071, China
| | - Yichun Wang
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei Province 430071, China
| | - Zejian Xue
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei Province 430071, China
| | - Ping Lei
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China
| | - Yong He
- Department of Nuclear Medicine, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan, Hubei Province 430071, China
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More S, Marakalala MJ, Sathekge M. Tuberculosis: Role of Nuclear Medicine and Molecular Imaging With Potential Impact of Neutrophil-Specific Tracers. Front Med (Lausanne) 2021; 8:758636. [PMID: 34957144 PMCID: PMC8703031 DOI: 10.3389/fmed.2021.758636] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Accepted: 11/03/2021] [Indexed: 01/02/2023] Open
Abstract
With Tuberculosis (TB) affecting millions of people worldwide, novel imaging modalities and tools, particularly nuclear medicine and molecular imaging, have grown with greater interest to assess the biology of the tuberculous granuloma and evolution thereof. Much early work has been performed at the pre-clinical level using gamma single photon emission computed tomography (SPECT) agents exploiting certain characteristics of Mycobacterium tuberculosis (MTb). Both antituberculous SPECT and positron emission tomography (PET) agents have been utilised to characterise MTb. Other PET tracers have been utilised to help to characterise the biology of MTb (including Gallium-68-labelled radiopharmaceuticals). Of all the tracers, 2-[18F]FDG has been studied extensively over the last two decades in many aspects of the treatment paradigm of TB: at diagnosis, staging, response assessment, restaging, and in potentially predicting the outcome of patients with latent TB infection. Its lower specificity in being able to distinguish different inflammatory cell types in the granuloma has garnered interest in reviewing more specific agents that can portend prognostic implications in the management of MTb. With the neutrophil being a cell type that portends this poorer prognosis, imaging this cell type may be able to answer more accurately questions relating to the tuberculous granuloma transmissivity and may help in characterising patients who may be at risk of developing active TB. The formyl peptide receptor 1(FPR1) expressed by neutrophils is a key marker in this process and is a potential target to characterise these areas. The pre-clinical work regarding the role of radiolabelled N-cinnamoyl –F-(D) L – F – (D) –L F (cFLFLF) (which is an antagonist for FPR1) using Technetium 99m-labelled conjugates and more recently radiolabelled with Gallium-68 and Copper 64 is discussed. It is the hope that further work with this tracer may accelerate its potential to be utilised in responding to many of the current diagnostic dilemmas and challenges in TB management, thereby making the tracer a translatable option in routine clinical care.
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Affiliation(s)
- Stuart More
- Division of Nuclear Medicine, Department of Radiation Medicine, University of Cape Town, Cape Town, South Africa
- Department of Nuclear Medicine, University of Pretoria and Steve Biko Academic Hospital, Pretoria, South Africa
- Nuclear Medicine Research Infrastructure, Steve Biko Academic Hospital, Pretoria, South Africa
- *Correspondence: Stuart More
| | - Mohlopheni J. Marakalala
- Africa Health Research Institute, Durban, South Africa
- Division of Infection and Immunity, University College London, London, United Kingdom
- School of Laboratory Medicine and Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
- Division of Immunology, Department of Pathology, University of Cape Town, Cape Town, South Africa
| | - Michael Sathekge
- Department of Nuclear Medicine, University of Pretoria and Steve Biko Academic Hospital, Pretoria, South Africa
- Nuclear Medicine Research Infrastructure, Steve Biko Academic Hospital, Pretoria, South Africa
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Boltersdorf T, Ansari J, Senchenkova EY, Groeper J, Pajonczyk D, Vital SA, Kaur G, Alexander JS, Vogl T, Rescher U, Long NJ, Gavins FNE. Targeting of Formyl Peptide Receptor 2 for in vivo imaging of acute vascular inflammation. Theranostics 2020; 10:6599-6614. [PMID: 32550892 PMCID: PMC7295040 DOI: 10.7150/thno.44226] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 04/19/2020] [Indexed: 12/15/2022] Open
Abstract
Inflammatory conditions are associated with a variety of diseases and can significantly contribute to their pathophysiology. Neutrophils are recognised as key players in driving vascular inflammation and promoting inflammation resolution. As a result, neutrophils, and specifically their surface formyl peptide receptors (FPRs), are attractive targets for non-invasive visualization of inflammatory disease states and studying mechanistic details of the process. Methods: A small-molecule Formyl Peptide Receptor 2 (FPR2/ALX)-targeted compound was combined with two rhodamine-derived fluorescent tags to form firstly, a targeted probe (Rho-pip-C1) and secondly a targeted, pH-responsive probe (Rho-NH-C1) for in vivo applications. We tested internalization, toxicity and functional interactions with neutrophils in vitro for both compounds, as well as the fluorescence switching response of Rho-NH-C1 to neutrophil activation. Finally, in vivo imaging (fluorescent intravital microscopy [IVM]) and therapeutic efficacy studies were performed in an inflammatory mouse model. Results: In vitro studies showed that the compounds bound to human neutrophils via FPR2/ALX without causing internalization at relevant concentrations. Additionally, the compounds did not cause toxicity or affect neutrophil functional responses (e.g. chemotaxis or transmigration). In vivo studies using IVM showed Rho-pip-C1 bound to activated neutrophils in a model of vascular inflammation. The pH-sensitive (“switchable”) version termed Rho-NH-C1 validated these findings, showing fluorescent activity only in inflammatory conditions. Conclusions: These results indicate a viable design of fluorescent probes that have the ability to detect inflammatory events by targeting activated neutrophils.
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Alshamrani AF, Prior TJ, Burke BP, Roberts DP, Archibald SJ, Higham LJ, Stasiuk G, Redshaw C. Water-Soluble Rhenium Phosphine Complexes Incorporating the Ph 2C(X) Motif (X = O -, NH -): Structural and Cytotoxicity Studies. Inorg Chem 2020; 59:2367-2378. [PMID: 31984731 DOI: 10.1021/acs.inorgchem.9b03239] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reaction of [ReOCl3(PPh3)2] or [ReO2I(PPh3)2] with 2,2'-diphenylglycine (dpgH2) in refluxing ethanol afforded the air-stable complex [ReO(dpgH)(dpg)(PPh3)] (1). Treatment of [ReO(OEt)I2(PPh3)2] with 1,2,3-triaza-7-phosphaadamantane (PTA) afforded the complex [ReO(OEt)I2(PTA)2] (2). Reaction of [ReOI2(PTA)3] with dpgH2 led to the isolation of the complex [Re(NCPh2)I2(PTA)3]·0.5EtOH (3·0.5EtOH). A similar reaction but using [ReOX2(PTA)3] (X = Cl, Br) resulted in the analogous halide complexes [Re(NCPh2)Cl2(PTA)3]·2EtOH (4·2EtOH) and [Re(NCPh2)(PTA)3Br2]·1.6EtOH (5·1.6EtOH). Using benzilic acid (2,2'-diphenylglycolic acid, benzH) with 2 afforded the complex [ReO(benz)2(PTA)][PTAH]·EtOH (6·EtOH). The potential for the formation of complexes using radioisotopes with relatively short half-lives suitable for nuclear medicine applications by developing conditions for [Re(NCPh2)(dpg)I(PTA)3] (7)[ReO4]- in a 4 h time scale was investigated. A procedure for the technetium analog of complex [Re(NCPh2)I2(PTA)3] (3) from 99mTc[TcO4]- was then investigated. The molecular structures of 1-7 are reported; complexes 3-7 have been studied using in vitro cell assays (HeLa, HCT116, HT-29, and HEK 293) and were found to have IC50 values in the range of 29-1858 μM.
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Affiliation(s)
- Abdullah F Alshamrani
- Department of Chemistry & Biochemistry , University of Hull , Cottingham Road , Hull HU6 7RX , U.K.,Department of Biomedical Sciences , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
| | - Timothy J Prior
- Department of Chemistry & Biochemistry , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
| | - Benjamin P Burke
- Positron Emission Tomography Research Centre , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
| | - David P Roberts
- Positron Emission Tomography Research Centre , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
| | - Stephen J Archibald
- Department of Biomedical Sciences , University of Hull , Cottingham Road , Hull HU6 7RX , U.K.,Positron Emission Tomography Research Centre , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
| | - Lee J Higham
- School of Natural & Environmental Sciences , Newcastle University , Newcastle upon Tyne NE1 7RU , U.K
| | - Graeme Stasiuk
- Department of Biomedical Sciences , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
| | - Carl Redshaw
- Department of Chemistry & Biochemistry , University of Hull , Cottingham Road , Hull HU6 7RX , U.K
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6
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Charles EJ, Chordia MD, Zhao Y, Zhang Y, Mehaffey JH, Glover DK, Dimastromatteo J, Chancellor WZ, Sharma AK, Kron IL, Pan D, Laubach VE. SPECT imaging of lung ischemia-reperfusion injury using [ 99mTc]cFLFLF for molecular targeting of formyl peptide receptor 1. Am J Physiol Lung Cell Mol Physiol 2020; 318:L304-L313. [PMID: 31800262 PMCID: PMC7052676 DOI: 10.1152/ajplung.00220.2018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Primary graft dysfunction after lung transplantation, a consequence of ischemia-reperfusion injury (IRI), is a major cause of morbidity and mortality. IRI involves acute inflammation and innate immune cell activation, leading to rapid infiltration of neutrophils. Formyl peptide receptor 1 (FPR1) expressed by phagocytic leukocytes plays an important role in neutrophil function. The cell surface expression of FPR1 is rapidly and robustly upregulated on neutrophils in response to inflammatory stimuli. Thus, we hypothesized that use of [99mTc]cFLFLF, a selective FPR1 peptide ligand, would permit in vivo neutrophil labeling and noninvasive imaging of IRI using single-photon emission computed tomography (SPECT). A murine model of left lung IRI was utilized. Lung function, neutrophil infiltration, and SPECT imaging were assessed after 1 h of ischemia and 2, 12, or 24 h of reperfusion. [99mTc]cFLFLF was injected 2 h before SPECT. Signal intensity by SPECT and total probe uptake by gamma counts were 3.9- and 2.3-fold higher, respectively, in left lungs after ischemia and 2 h of reperfusion versus sham. These values significantly decreased with longer reperfusion times, correlating with resolution of IRI as shown by improved lung function and decreased neutrophil infiltration. SPECT results were confirmed using Cy7-cFLFLF-based fluorescence imaging of lungs. Immunofluorescence microscopy confirmed cFLFLF binding primarily to activated neutrophils. These results demonstrate that [99mTc]cFLFLF SPECT enables noninvasive detection of lung IRI and permits monitoring of resolution of injury over time. Clinical application of [99mTc]cFLFLF SPECT may permit diagnosis of lung IRI for timely intervention to improve outcomes after transplantation.
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Affiliation(s)
- Eric J. Charles
- 1Department of Surgery, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Mahendra D. Chordia
- 2Department of Radiology and Medical Imaging, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Yunge Zhao
- 1Department of Surgery, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Yi Zhang
- 5Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, California
| | - J. Hunter Mehaffey
- 1Department of Surgery, University of Virginia School of Medicine, Charlottesville, Virginia
| | - David K. Glover
- 3Department of Medicine, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Julien Dimastromatteo
- 4Department of Biomedical Engineering, University of Virginia School of Medicine, Charlottesville, Virginia
| | - W. Zachary Chancellor
- 1Department of Surgery, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Ashish K. Sharma
- 1Department of Surgery, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Irving L. Kron
- 1Department of Surgery, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Dongfeng Pan
- 2Department of Radiology and Medical Imaging, University of Virginia School of Medicine, Charlottesville, Virginia
| | - Victor E. Laubach
- 1Department of Surgery, University of Virginia School of Medicine, Charlottesville, Virginia
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Boltersdorf T, Ansari J, Senchenkova EY, Jiang L, White AJP, Coogan M, Gavins FNE, Long NJ. Development, characterisation and in vitro evaluation of lanthanide-based FPR2/ALX-targeted imaging probes. Dalton Trans 2019; 48:16764-16775. [PMID: 31674608 DOI: 10.1039/c9dt03520f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We report the design, preparation and characterisation of three small-molecule, Formyl Peptide Receptor (FPR)-targeted lanthanide complexes (Tb·14, Eu·14 and Gd·14). Long-lived, metal-based emission was observed from the terbium complex (τH2O = 1.9 ms), whereas only negligible lanthanide signals were detected in the europium analogue. Ligand-centred emission was investigated using Gd·14 at room temperature and 77 K, leading to the postulation that metal emission may be sensitised via a ligand-based charge transfer state of the targeting Quin C1 unit. Comparatively high longitudinal relaxivity values (r1) for octadentate metal complexes of Gd·14 were determined (6.9 mM-1 s-1 at 400 MHz and 294 K), which could be a result of a relative increase in twisted square antiprism (TSAP) isomer prevalence compared to typical DOTA constructs (as evidenced by NMR spectroscopy). In vitro validation of concentration responses of Tb·14via three key neutrophil functional assays demonstrated that the inflammatory responses of neutrophils (i.e. chemotaxis, transmigration and granular release) remained unchanged in the presence of specific concentrations of the compound. Using a time-resolved microscopy set-up we were able to observe binding of the Tb·14 probe to stimulated human neutrophils around the cell periphery, while in the same experiment with un-activated neutrophils, no metal-based signals were detected. Our results demonstrate the utility of Tb·14 for time-resolved microscopy with lifetimes several orders of magnitude longer than autofluorescent signals and a preferential uptake in stimulated neutrophils.
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Affiliation(s)
- Tamara Boltersdorf
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, White City, London, W12 0BZ, UK.
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Vellaisamy K, Li G, Wang W, Leung CH, Ma DL. A long-lived peptide-conjugated iridium(iii) complex as a luminescent probe and inhibitor of the cell migration mediator, formyl peptide receptor 2. Chem Sci 2018; 9:8171-8177. [PMID: 30568767 PMCID: PMC6256120 DOI: 10.1039/c8sc02733a] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 09/29/2018] [Indexed: 12/18/2022] Open
Abstract
Formyl peptide receptors play important biological and therapeutic roles in wound repair and inflammatory diseases. In this work, we present a luminescent iridium(iii) complex (6) conjugated with the peptide agonist WKYMVm as a luminescent formyl peptide receptor 2 (FPR2) imaging probe in living cells. Complex 6 displayed ideal cell imaging characteristics, high photostability and low cytotoxicity. Competition assays with a known FPR2 antagonist, WRW4, and siRNA knockdown experiments both revealed that complex 6 selectively targeted FPR2 in living HUVEC cells. Moreover, complex 6 regulated FPR2 signalling in HUVEC cells as shown using a mechanical scratch assay. Finally, complex 6 reduced epithelial cell migration capacity and inhibited lipoxin A4 (LXA4)-triggered cell migration in HUVEC cells, demonstrating the ability of this complex to inhibit FPR2 in living cells. To our knowledge, this is the first long-lived probe for imaging FPR2 in living cells.
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Affiliation(s)
- Kasipandi Vellaisamy
- Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong , China .
| | - Guodong Li
- State Key Laboratory of Quality Research in Chinese Medicine , Institute of Chinese Medical Sciences , University of Macau , Macao , China .
| | - Wanhe Wang
- Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong , China .
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine , Institute of Chinese Medical Sciences , University of Macau , Macao , China .
| | - Dik-Lung Ma
- Department of Chemistry , Hong Kong Baptist University , Kowloon Tong , Hong Kong , China .
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Kimura H, Yamauchi S, Kawashima H, Arimitsu K, Yagi Y, Nakamoto Y, Togashi K, Ono M, Saji H. Synthesis and evaluation of a [ 18F]formyl-Met-Leu-Phe derivative: A positron emission tomography imaging probe for bacterial infections. Bioorg Med Chem Lett 2018; 28:2949-2952. [PMID: 30006064 DOI: 10.1016/j.bmcl.2018.07.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/25/2018] [Accepted: 07/03/2018] [Indexed: 12/18/2022]
Abstract
The tripeptide formyl-Met-Leu-Phe (fMLF) is a prototype of N-formylated chemotactic peptides for neutrophils owing to its ability to bind and activate the G protein-coupled formyl peptide receptor (FPR). Here, we developed an 18F-labeled fMLF derivative targeting FPR as a positron emission tomography (PET) imaging probe for bacterial infections. The study demonstrates that the fMLF derivative fMLFXYk(FB)k (X = Nle) has a high affinity for FPR (Ki = 0.62 ± 0.13 nM). The radiochemical yield and purity of [18F]fMLFXYk(FB)k were 16% and >96%, respectively. The in vivo biodistribution study showed that [18F]fMLFXYk(FB)k uptake was higher in the bacterial infected region than in the non-infected region. We observed considerably higher infection-to-muscle ratio of 4.6 at 60 min after [18F]fMLFXYk(FB)k injection. Furthermore, small-animal PET imaging studies suggested that [18F]fMLFXYk(FB)k uptake in the bacterial infected region was clearly visualized 60 min after injection.
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Affiliation(s)
- Hiroyuki Kimura
- Department of Patho-Functional Bioanalysis, Kyoto University Graduate School of Pharmaceutical Sciences, 46-29, Yoshida Shimoadachi-cho, Sakyo-ku, Kyoto 606-8501, Japan; Department of Analytical and Bioinorganic Chemistry, Kyoto Pharmaceutical University, 5 Nakauchi-cho, Misasagi, Yamashina-ku, Kyoto 607-8414, Japan.
| | - Saki Yamauchi
- Department of Patho-Functional Bioanalysis, Kyoto University Graduate School of Pharmaceutical Sciences, 46-29, Yoshida Shimoadachi-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hidekazu Kawashima
- Radioisotope Research Center, Kyoto Pharmaceutical University, 1 Misasagi-shichono-cho, Yamashina-ku, Kyoto 607-8412, Japan; Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Kenji Arimitsu
- Department of Patho-Functional Bioanalysis, Kyoto University Graduate School of Pharmaceutical Sciences, 46-29, Yoshida Shimoadachi-cho, Sakyo-ku, Kyoto 606-8501, Japan; Department of Analytical and Bioinorganic Chemistry, Kyoto Pharmaceutical University, 5 Nakauchi-cho, Misasagi, Yamashina-ku, Kyoto 607-8414, Japan
| | - Yusuke Yagi
- Department of Patho-Functional Bioanalysis, Kyoto University Graduate School of Pharmaceutical Sciences, 46-29, Yoshida Shimoadachi-cho, Sakyo-ku, Kyoto 606-8501, Japan; Department of Analytical and Bioinorganic Chemistry, Kyoto Pharmaceutical University, 5 Nakauchi-cho, Misasagi, Yamashina-ku, Kyoto 607-8414, Japan
| | - Yuji Nakamoto
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Kaori Togashi
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Masahiro Ono
- Department of Patho-Functional Bioanalysis, Kyoto University Graduate School of Pharmaceutical Sciences, 46-29, Yoshida Shimoadachi-cho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hideo Saji
- Department of Patho-Functional Bioanalysis, Kyoto University Graduate School of Pharmaceutical Sciences, 46-29, Yoshida Shimoadachi-cho, Sakyo-ku, Kyoto 606-8501, Japan.
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Saptiama I, Kaneti YV, Oveisi H, Suzuki Y, Tsuchiya K, Takai K, Sakae T, Pradhan S, Hossain MSA, Fukumitsu N, Ariga K, Yamauchi Y. Molybdenum Adsorption Properties of Alumina-Embedded Mesoporous Silica for Medical Radioisotope Production. BCSJ 2018. [DOI: 10.1246/bcsj.20170295] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Indra Saptiama
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Material Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044
- Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8576
| | - Yusuf Valentino Kaneti
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Material Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044
| | - Hamid Oveisi
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Material Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044
- Department of Materials and Polymer Engineering, Hakim Sabzevari University, Sabzevar 9617976487, Iran
| | - Yoshitaka Suzuki
- Japan Atomic Energy Agency (JAEA), 4002 Narita, Oarai, Higashi-Ibaraki, Ibaraki 311-1393
| | - Kunihiko Tsuchiya
- Japan Atomic Energy Agency (JAEA), 4002 Narita, Oarai, Higashi-Ibaraki, Ibaraki 311-1393
| | - Kimiko Takai
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Material Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044
| | - Takeji Sakae
- Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8576
| | - Subrata Pradhan
- Institute for Plasma Research, Gandhinagar 382 428, Gujarat, India
| | - Md. Shahriar A. Hossain
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Material Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044
- Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, North Wollongong, NSW 2500, Australia
| | - Nobuyoshi Fukumitsu
- Department of Radiation Oncology, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8576
| | - Katsuhiko Ariga
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Material Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-0827
| | - Yusuke Yamauchi
- Australian Institute for Innovative Materials (AIIM), University of Wollongong, Squires Way, North Wollongong, NSW 2500, Australia
- School of Chemical Engineering & Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD 4072, Australia
- Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea
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11
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Pacilio M, Lauri C, Prosperi D, Petitti A, Signore A. New SPECT and PET Radiopharmaceuticals for Imaging Inflammatory Diseases: A Meta-analysis of the Last 10 Years. Semin Nucl Med 2018; 48:261-276. [PMID: 29626943 DOI: 10.1053/j.semnuclmed.2017.12.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Modern molecular nuclear medicine is rapidly developing in the field of imaging of chronic inflammatory diseases, and many new radiopharmaceuticals have been recently described and tested in animals and man. These can detect early pathophysiological changes before the development of anatomical changes and, often, before clinical onset of symptoms. This field includes new radiopharmaceuticals for SPECT and PET use to define new strategies for imaging immune cells as well as tissue modifications induced by the inflammatory process. In this review, we present the results of a meta-analysis based on radiopharmaceuticals (for SPECT or PET) that are not commercially available and that have been used, at least once, in humans in the last 10 years.
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Affiliation(s)
- Marta Pacilio
- Nuclear Medicine Unit, Department of Medical-Surgical Sciences and of Translational Medicine, "Sapienza" University of Rome, Italy
| | - Chiara Lauri
- Nuclear Medicine Unit, Department of Medical-Surgical Sciences and of Translational Medicine, "Sapienza" University of Rome, Italy.; Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, The Netherlands
| | - Daniela Prosperi
- Nuclear Medicine Unit, Department of Medical-Surgical Sciences and of Translational Medicine, "Sapienza" University of Rome, Italy
| | - Agnese Petitti
- Nuclear Medicine Unit, Department of Medical-Surgical Sciences and of Translational Medicine, "Sapienza" University of Rome, Italy
| | - Alberto Signore
- Nuclear Medicine Unit, Department of Medical-Surgical Sciences and of Translational Medicine, "Sapienza" University of Rome, Italy.; Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, The Netherlands.
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12
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Locke LW, Kothandaraman S, Tweedle M, Chaney S, Wozniak DJ, Schlesinger LS. Use of a leukocyte-targeted peptide probe as a potential tracer for imaging the tuberculosis granuloma. Tuberculosis (Edinb) 2018; 108:201-210. [PMID: 29623875 DOI: 10.1016/j.tube.2018.01.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 12/19/2017] [Accepted: 01/04/2018] [Indexed: 12/25/2022]
Abstract
Granulomas are the histopathologic hallmark of tuberculosis (TB), both in latency and active disease. Diagnostic and therapeutic strategies that specifically target granulomas have not been developed. Our objective is to develop a probe for imaging relevant immune cell populations infiltrating the granuloma. We report the binding specificity of Cyanine 3 (Cy3)-labeled cFLFLFK-PEG12 to human leukocytes and cellular constituents within a human in vitro granuloma model. We also report use of the probe in in vivo studies using a mouse model of lung granulomatous inflammation. We found that the probe preferentially binds human neutrophils and macrophages in human granuloma structures. Inhibition studies showed that peptide binding to human neutrophils is mediated by the receptor formyl peptide receptor 1 (FPR1). Imaging the distribution of intravenously administered cFLFLFK-PEG12-Cy3 in the mouse model revealed probe accumulation within granulomatous inflammatory responses in the lung. Further characterization revealed that the probe preferentially associated with neutrophils and cells of the monocyte/macrophage lineage. As there is no current clinical diagnostic imaging tool that specifically targets granulomas, the use of this probe in the context of latent and active TB may provide a unique advantage over current clinical imaging probes. We anticipate that utilizing a FPR1-targeted radiopharmaceutical analog of cFLFLFK in preclinical imaging studies may greatly contribute to our understanding of granuloma influx patterns and the biological roles and consequences of FPR1-expressing cells in contributing to disease pathogenesis.
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Affiliation(s)
- Landon W Locke
- Department of Microbial Infection and Immunity, Center for Microbial Interface Biology, 793 Biomedical Research Tower, 460 W. 12th Avenue, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
| | - Shankaran Kothandaraman
- Department of Radiology, The Wright Center for Innovation in Biomedical Imaging, Martha Morehouse Medical Plaza, 2050 Kenny Road, The Ohio State University, Columbus, OH 43221, USA.
| | - Michael Tweedle
- Department of Radiology, The Wright Center for Innovation in Biomedical Imaging, Martha Morehouse Medical Plaza, 2050 Kenny Road, The Ohio State University, Columbus, OH 43221, USA.
| | - Sarah Chaney
- Department of Veterinary Biosciences, College of Veterinary Medicine, Ohio State University, Columbus, OH, USA
| | - Daniel J Wozniak
- Department of Microbial Infection and Immunity, Center for Microbial Interface Biology, 793 Biomedical Research Tower, 460 W. 12th Avenue, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA.
| | - Larry S Schlesinger
- Department of Microbial Infection and Immunity, Center for Microbial Interface Biology, 793 Biomedical Research Tower, 460 W. 12th Avenue, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; Texas Biomedical Research Institute, 7620 NW Loop 410, San Antonio, TX 78227, USA.
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13
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Kniess T, Laube M, Wüst F, Pietzsch J. Technetium-99m based small molecule radiopharmaceuticals and radiotracers targeting inflammation and infection. Dalton Trans 2017; 46:14435-14451. [DOI: 10.1039/c7dt01735a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
99mTc-labeled antibiotics, antifungal drugs, antimicrobial peptides and COX-2 inhibitors are comprehensively reviewed.
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Affiliation(s)
- Torsten Kniess
- Helmholtz-Zentrum Dresden-Rossendorf
- Institute of Radiopharmaceutical Cancer Research
- 01328 Dresden
- Germany
| | - Markus Laube
- Helmholtz-Zentrum Dresden-Rossendorf
- Institute of Radiopharmaceutical Cancer Research
- 01328 Dresden
- Germany
| | - Frank Wüst
- University of Alberta
- Department of Oncology
- 11560 University Avenue
- Edmonton
- Canada
| | - Jens Pietzsch
- Helmholtz-Zentrum Dresden-Rossendorf
- Institute of Radiopharmaceutical Cancer Research
- 01328 Dresden
- Germany
- Technische Universität Dresden
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14
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Kan W, Zhuo L, Wang G, Chen W, Wei H, Zhou Z. Coordination investigation of rhenium with MAG3 using LC-MS and UV spectrometer and the simple radiolabelling process. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-016-4885-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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15
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Yang X, Chordia MD, Du X, Graves JL, Zhang Y, Park YS, Guo Y, Pan D, Cui Q. Targeting formyl peptide receptor 1 of activated macrophages to monitor inflammation of experimental osteoarthritis in rat. J Orthop Res 2016; 34:1529-38. [PMID: 26717557 DOI: 10.1002/jor.23148] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 12/21/2015] [Indexed: 02/04/2023]
Abstract
Macrophages play a crucial role in the pathogenesis of osteoarthritis (OA). In this study, the feasibility of a formyl peptide receptor 1 (Fpr1)-targeting peptide probe cFLFLF-PEG-(64) Cu via positron emission tomography (PET) imaging was investigated for detection of macrophage activity during development of OA. Monoiodoacetate (MIA) was intraarticularly injected into the knee joint of Sprague-Dawley rats to induce OA. Five days later, cFLFLF-PEG-(64) Cu (∼7,400 kBq/rat) was injected into the tail vein and microPET/CT imaging was performed to assess the OA inflammation by detecting infiltration of macrophages by Fpr1 expression. In addition, a murine macrophage cell line RAW264.7 and two fluorescent probes cFLFLF-PEG-cyanine 7 (cFLFLF-PEG-Cy7) and cFLFLF-PEG-cyanine 5 (cFLFLF-PEG-Cy5) were used to define the binding specificity of the peptide to macrophages. It was found with the MIA model that the maximal standard uptake values (SUVmax ) for right (MIA treated) and left (control) knees were 17.96 ± 5.45 and 3.00 ± 1.40, respectively. Histological evaluation of cryomicrotome sections showed that Fpr1 expression, cFLFLF-PEG-Cy5 binding, and tartrate-resistant acid phosphatase activity were elevated in the injured synovial membranes. The in vitro experiments demonstrated that both fluorescent peptide probes could bind specifically to RAW264.7 cells, which was blocked by cFLFLF but not by the scramble peptide. The findings highlighted the use of cFLFLF-PEG-(64) Cu/PET as an effective method potentially applied for detection and treatment evaluation of OA. © 2015 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 34:1529-1538, 2016.
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Affiliation(s)
- Xinlin Yang
- Department of Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia, 22903
| | - Mahendra D Chordia
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, Virginia, 22903
| | - Xuejun Du
- Department of Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia, 22903.,Department of Orthopaedic Surgery, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453100, PR China
| | - John L Graves
- Department of Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia, 22903
| | - Yi Zhang
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, Virginia, 22903
| | - Yong-Sang Park
- Department of Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia, 22903
| | - Yongfei Guo
- Department of Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia, 22903
| | - Dongfeng Pan
- Department of Radiology and Medical Imaging, University of Virginia, Charlottesville, Virginia, 22903
| | - Quanjun Cui
- Department of Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia, 22903
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16
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Thölking G, Schuette-Nuetgen K, Kentrup D, Pawelski H, Reuter S. Imaging-based diagnosis of acute renal allograft rejection. World J Transplant 2016; 6:174-182. [PMID: 27011915 PMCID: PMC4801793 DOI: 10.5500/wjt.v6.i1.174] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Revised: 08/28/2015] [Accepted: 12/02/2015] [Indexed: 02/05/2023] Open
Abstract
Kidney transplantation is the best available treatment for patients with end stage renal disease. Despite the introduction of effective immunosuppressant drugs, episodes of acute allograft rejection still endanger graft survival. Since efficient treatment of acute rejection is available, rapid diagnosis of this reversible graft injury is essential. For diagnosis of rejection, invasive core needle biopsy of the graft is the “gold-standard”. However, biopsy carries the risk of significant graft injury and is not immediately feasible in patients taking anticoagulants. Therefore, a non-invasive tool assessing the whole organ for specific and fast detection of acute allograft rejection is desirable. We herein review current imaging-based state of the art approaches for non-invasive diagnostics of acute renal transplant rejection. We especially focus on new positron emission tomography-based as well as targeted ultrasound-based methods.
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17
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Li J, Zhang Y, Chordia MD, Wu H, Shao L, Pan D. Multimodal formyl peptide receptor 1 targeted inflammation imaging probe: cFLFLF-MHI-DOTA. Bioorg Med Chem Lett 2016; 26:1052-1055. [DOI: 10.1016/j.bmcl.2015.12.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 12/03/2015] [Accepted: 12/10/2015] [Indexed: 01/08/2023]
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