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Polyak A, Harting H, Angrisani N, Herrmann T, Ehlert N, Meißner J, Willmann M, Al-Bazaz S, Ross TL, Bankstahl JP, Reifenrath J. Preparation and PET/CT imaging of implant directed 68Ga-labeled magnetic nanoporous silica nanoparticles. J Nanobiotechnology 2023; 21:270. [PMID: 37592318 PMCID: PMC10433681 DOI: 10.1186/s12951-023-02041-8] [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: 05/22/2023] [Accepted: 07/31/2023] [Indexed: 08/19/2023] Open
Abstract
BACKGROUND Implant infections caused by biofilm forming bacteria are a major threat in orthopedic surgery. Delivering antibiotics directly to an implant affected by a bacterial biofilm via superparamagnetic nanoporous silica nanoparticles could present a promising approach. Nevertheless, short blood circulation half-life because of rapid interactions of nanoparticles with the host's immune system hinder them from being clinically used. The aim of this study was to determine the temporal in vivo resolution of magnetic nanoporous silica nanoparticle (MNPSNP) distribution and the effect of PEGylation and clodronate application using PET/CT imaging and gamma counting in an implant mouse model. METHODS PEGylated and non-PEGylated MNPSNPs were radiolabeled with gallium-68 (68Ga), implementing the chelator tris(hydroxypyridinone). 36 mice were included in the study, 24 mice received a magnetic implant subcutaneously on the left and a titanium implant on the right hind leg. MNPSNP pharmacokinetics and implant accumulation was analyzed in dependence on PEGylation and additional clodronate application. Subsequently gamma counting was performed for further final analysis. RESULTS The pharmacokinetics and biodistribution of all radiolabeled nanoparticles could clearly be visualized and followed by dynamic PET/CT imaging. Both variants of 68Ga-labeled MNPSNP accumulated mainly in liver and spleen. PEGylation of the nanoparticles already resulted in lower liver uptakes. Combination with macrophage depletion led to a highly significant effect whereas macrophage depletion alone could not reveal significant differences. Although MNPSNP accumulation around implants was low in comparison to the inner organs in PET/CT imaging, gamma counting displayed a significantly higher %I.D./g for the tissue surrounding the magnetic implants compared to the titanium control. Additional PEGylation and/or macrophage depletion revealed no significant differences regarding nanoparticle accumulation at the implantation site. CONCLUSION Tracking of 68Ga-labeled nanoparticles in a mouse model in the first critical hours post-injection by PET/CT imaging provided a better understanding of MNPSNP distribution, elimination and accumulation. Although PEGylation increases circulation time, nanoparticle accumulation at the implantation site was still insufficient for infection treatment and additional efforts are needed to increase local accumulation.
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Affiliation(s)
- Andras Polyak
- NIFE - Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany
- Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
- Department of Nuclear Medicine, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
| | - Heidi Harting
- NIFE - Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany.
- Clinic for Orthopedic Surgery, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany.
| | - Nina Angrisani
- NIFE - Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany
- Clinic for Orthopedic Surgery, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
| | - Timo Herrmann
- Institute for Inorganic Chemistry, Leibniz University Hannover, Callinstraße 9, 30167, Hannover, Germany
| | - Nina Ehlert
- Institute for Inorganic Chemistry, Leibniz University Hannover, Callinstraße 9, 30167, Hannover, Germany
| | - Jessica Meißner
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hanover, Foundation, Buenteweg 17, 30559, Hannover, Germany
| | - Michael Willmann
- Department of Nuclear Medicine, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
| | - Silav Al-Bazaz
- Department of Nuclear Medicine, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
| | - Tobias L Ross
- Department of Nuclear Medicine, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
| | - Jens P Bankstahl
- Department of Nuclear Medicine, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
| | - Janin Reifenrath
- NIFE - Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany
- Clinic for Orthopedic Surgery, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
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Polyak A, Képes Z, Trencsényi G. Implant Imaging: Perspectives of Nuclear Imaging in Implant, Biomaterial, and Stem Cell Research. Bioengineering (Basel) 2023; 10:bioengineering10050521. [PMID: 37237591 DOI: 10.3390/bioengineering10050521] [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] [Received: 03/12/2023] [Revised: 04/17/2023] [Accepted: 04/23/2023] [Indexed: 05/28/2023] Open
Abstract
Until now, very few efforts have been made to specifically trace, monitor, and visualize implantations, artificial organs, and bioengineered scaffolds for tissue engineering in vivo. While mainly X-Ray, CT, and MRI methods have been used for this purpose, the applications of more sensitive, quantitative, specific, radiotracer-based nuclear imaging techniques remain a challenge. As the need for biomaterials increases, so does the need for research tools to evaluate host responses. PET (positron emission tomography) and SPECT (single photon emission computer tomography) techniques are promising tools for the clinical translation of such regenerative medicine and tissue engineering efforts. These tracer-based methods offer unique and inevitable support, providing specific, quantitative, visual, non-invasive feedback on implanted biomaterials, devices, or transplanted cells. PET and SPECT can improve and accelerate these studies through biocompatibility, inertivity, and immune-response evaluations over long investigational periods at high sensitivities with low limits of detection. The wide range of radiopharmaceuticals, the newly developed specific bacteria, and the inflammation of specific or fibrosis-specific tracers as well as labeled individual nanomaterials can represent new, valuable tools for implant research. This review aims to summarize the opportunities of nuclear-imaging-supported implant research, including bone, fibrosis, bacteria, nanoparticle, and cell imaging, as well as the latest cutting-edge pretargeting methods.
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Affiliation(s)
- Andras Polyak
- Division of Nuclear Medicine and Translational Imaging, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary
| | - Zita Képes
- Division of Nuclear Medicine and Translational Imaging, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary
| | - György Trencsényi
- Division of Nuclear Medicine and Translational Imaging, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, Hungary
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Topal T, Polyak A, Toth N, Zombori-Toth N, Deri SZ, Virag L, Jost N, Farkas A, Baczko I, Farkas AS, Varro A. Endurance training induced cellular electrophysiological remodeling in a small and a large animal athlete’s heart model. Europace 2022. [DOI: 10.1093/europace/euac053.554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Funding: It was supported by NKFIH grants (K-19992, K- 135464, GINOP-2.3.2-15-2016-00047).
Background
The positive impact of regular exercise on a healthy and fulfilling lifestyle. Therefore, active athletes are considered the healthiest members of our society. However, there is an increasing amount of evidence that long-term high-intensity sporting activity could also have adverse effects on the heart, such as impaired electrophysiological properties. Heavy long-term training can lead to structural and functional remodelling of the heart, which in turn, can evoke malignant cardiac arrhythmias.
Purpose
To develop animal models with a significant translational value of the human athlete’s heart and to investigate underlying malignant drivers of cardiac arrhythmias due to the long-term endurance training in in vitro studies.
Methods
24 dogs from both sexes and 26 male guinea pigs were randomly assigned to sedentary (’Sed’) and trained (’Tr’) groups (n = 12-12; n=13-13). The latter group underwent a long-term endurance interval-training program on the treadmill 5 days a week for 4 months. ECG recordings and echocardiography validated the characteristic of athlete’s heart. After heart removal, the degree of interstitial fibrosis was quantified and ventricular myocytes were enzymatically dissociated via retrograde perfusion. The transmembrane ionic currents were recorded using the whole-cell configuration of the patch-clamp technique. The action potentials were measured by the perforated patch-clamp technique. Immunocytochemistry measurements were performed to determine the density of transmembrane ion channels.
Results
Based on the ECG and ECHO results, the vigorous training program resulted in significant cardiac adaptation in both species. In addition, it caused mild ventricular fibrosis. The repolarization is reflected as the 90 percent of action potential duration (APD90). It was significantly lengthened in the left ventricular myocytes of ‘Tr’ dogs. (‘Tr’ vs. ‘Sed’ 472.8±29.6 ms; =29 vs. 369.3±31.4 ms; n=24, p=0.023) and there was no difference in the case of guinea pigs. The amplitude of the transient outward current (Ito), which is not expressed in the guinea pig heart, was significantly smaller in the ‘Tr’ dogs (‘Tr’ vs. ‘Sed’ 7.6±0.6 pA/pF, n=54 vs. 10.2±1.0 pA/pF, n=42, p<0.05). Under the currently used protocols, no differences were detected in the magnitude of other ionic currents. The HCN4 gene expression was significantly higher in isolated myocytes in ’Tr’ dogs.
Conclusion
Increased ectopic activity is not rare among top athletes. Our results suggest an association between increased arrhythmia susceptibility and impaired repolarisation reserve related to down-regulation of Ito and prolonged APD90 and enhanced fibrotic changes. The overexpression of HCN4 gene in hypertrophic hearts, similar to heart failure, may evoke malignant ventricular arrhythmias. Further studies are warranted to clarify this hypothesis in more detail.
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Affiliation(s)
- T Topal
- University of Szeged, Szeged, Hungary
| | - A Polyak
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, H, Szeged, Hungary
| | - N Toth
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, H, Szeged, Hungary
| | - N Zombori-Toth
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, H, Szeged, Hungary
| | - SZ Deri
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, H, Szeged, Hungary
| | - L Virag
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, H, Szeged, Hungary
| | - N Jost
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, H, Szeged, Hungary
| | - A Farkas
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, H, Szeged, Hungary
| | - I Baczko
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, H, Szeged, Hungary
| | - AS Farkas
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, H, Szeged, Hungary
| | - A Varro
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, H, Szeged, Hungary
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Polyak A, Topal L, Zombori-Toth N, Toth N, Jost N, Farkas A, Agoston G, Baczko I, Farkas AS, Varro A. Cardiac remodeling accompanied by increased arrhythmia susceptibility in a dog model of chronic high-intensity endurance training. Europace 2022. [DOI: 10.1093/europace/euac053.553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): This work was supported by NKFIH grants (K-19992, K-135464) and GINOP-2.3.2-15-2016-00047.
Background
Despite the cardiovascular benefits of regular physical exercise, chronic high-level exercise can evoke malignant arrhythmias, including ventricular fibrillation and even sudden cardiac death, especially in young top athletes. In some cases the underlying mechanisms are unclear.
Objectives
The goal of this study was to assess mechanisms underlying cardiac structural-electrical changes and arrhythmia vulnerability by high-level vigorous exercise training in animal species that are electrophysiologically relevant to the human heart.
Methods
Beagle dogs were randomly assigned to matched sedentary (Sed) or intensive exercise-training (Ex) groups (n=12-12). Ex dogs underwent a 4-month-long intensive treadmill-running protocol (5 days a week, 6 hours a day at a speed of 14-21 km/h with an inclination from 5% to 12%). In vivo echocardiography and electrophysiological measurements were performed. Proarrhythmic sensitivity was tested and the autonomic alterations were examined. At study end, arrhythmia susceptibility was tested with high-frequency burst stimulation in open-chest anaesthetized dogs. This was followed by cardiac excision and cardiomyocyte isolation, formalin preservation for histology, snap-freezing in liquid nitrogen for molecular biology.
Results
The vigorous endurance training was resulted in increased left ventricular end-diastolic diameter, increased septal wall thickness and greater left ventricular mass index (Ex vs. Sed: 98±12 vs. 136±7 g/m2, p<0.05). Some degree of enhanced fibrosis was observed. Endurance training decreased heart rate both in whole animal and in vitro dog experiments. ECG recordings presented enhanced heart rate variability parameters, prolonged PQ (Ex vs. Sed: 98.3±2.9 vs. 116.7±3.6 ms, p<0.05), QRS (Ex vs. Sed : 60.5±2.4 vs 70.8±1.6 ms, p<0.05), QTc (Ex vs. Sed: 213.6±2.8 vs. 237.1±3.4 ms, p<0.05), Tp-Te (Ex vs. Sed: 27.9±2.5 vs.36.5±1.7 ms, p<0.05) intervals associated with significantly enhanced QT interval variability (eg. Ex vs. Sed: QT-STV, 2.5±0.2 vs. 3.6±0.4 ms, p<0.05), reflecting elevated level of repolarization dispersion. Ectopic activity was also enhanced in the exercised dog ventricle. Atropine treatment resulted in moderate heart rate increase in the Ex animals. Chronic endurance exercise elevated the proarrhythmic risk and consequent ventricular fibrillation in dogs subjected to burst electrical stimulation.
Conclusion
We developed a new animal model that shares similarities with the human endurance-trained athlete’s heart. The model represents increased arrhythmia susceptibility, an important clinical paradigm, and explores potential underlying mechanisms, including vagal enhancement, increased repolarization dispersion and enhanced fibrotic changes. Increased arrhythmia susceptibility is supported by the enhanced arrhythmia incidence in the exercised group. Similar changes may be present in young human top athletes, however further investigations are required.
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Affiliation(s)
- A Polyak
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, Hungary
| | - L Topal
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, Hungary
| | - N Zombori-Toth
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, Hungary
| | - N Toth
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, Hungary
| | - N Jost
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, Hungary
| | - A Farkas
- University of Szeged, 2nd Department of Medicine and Cardiology Centre, Szeged, Hungary
| | - G Agoston
- University of Szeged, Institute of Family Medicine, University of Szeged, Szeged, Hungary, Szeged, Hungary
| | - I Baczko
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, Hungary
| | - AS Farkas
- University of Szeged, 2nd Department of Medicine and Cardiology Centre, Szeged, Hungary
| | - A Varro
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, Hungary
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Borchert T, Beitar L, Langer LBN, Polyak A, Wester HJ, Ross TL, Hilfiker-Kleiner D, Bengel FM, Thackeray JT. Dissecting the target leukocyte subpopulations of clinically relevant inflammation radiopharmaceuticals. J Nucl Cardiol 2021; 28:1636-1645. [PMID: 31659697 DOI: 10.1007/s12350-019-01929-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 09/29/2019] [Accepted: 10/01/2019] [Indexed: 10/25/2022]
Abstract
BACKGROUND Leukocyte subtypes bear distinct pro-inflammatory, reparative, and regulatory functions. Imaging inflammation provides information on disease prognosis and may guide therapy, but the cellular basis of the signal remains equivocal. We evaluated leukocyte subtype specificity of characterized clinically relevant inflammation-targeted radiotracers. METHODS AND RESULTS Leukocyte populations were purified from blood- and THP-1-derived macrophages were polarized into M1-, reparative M2a-, or M2c-macrophages. In vitro uptake assays were conducted using tracers of enhanced glucose or amino acid metabolism and molecular markers of inflammatory cells. Both 18F-deoxyglucose (18F-FDG) and the labeled amino acid 11C-methionine (11C-MET) displayed higher uptake in neutrophils and monocytes compared to other leukocytes (P = 0.005), and markedly higher accumulation in pro-inflammatory M1-macrophages compared to reparative M2a-macrophages (P < 0.001). Molecular tracers 68Ga-DOTATATE targeting the somatostatin receptor type 2 and 68Ga-pentixafor targeting the chemokine receptor type 4 (CXCR4) exhibited broad uptake by leukocyte subpopulations and polarized macrophages with highest uptake in T-cells/natural killer cells and B-cells compared to neutrophils. Mitochondrial translocator protein (TSPO)-targeted 18F-flutriciclamide selectively accumulated in monocytes and pro-inflammatory M1 macrophages (P < 0.001). Uptake by myocytes and fibroblasts tended to be higher for metabolic radiotracers. CONCLUSIONS The different in vitro cellular uptake profiles may allow isolation of distinct phases of the inflammatory pathway with specific inflammation-targeted radiotracers. The pathogenetic cell population in specific inflammatory diseases should be considered in the selection of an appropriate imaging agent.
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Affiliation(s)
- Tobias Borchert
- Department of Nuclear Medicine, Hannover Medical School, Carl Neuberg-Str. 1, 30625, Hannover, Germany
| | - Laura Beitar
- Department of Nuclear Medicine, Hannover Medical School, Carl Neuberg-Str. 1, 30625, Hannover, Germany
| | - Laura B N Langer
- Department of Nuclear Medicine, Hannover Medical School, Carl Neuberg-Str. 1, 30625, Hannover, Germany
| | - Andras Polyak
- Department of Nuclear Medicine, Hannover Medical School, Carl Neuberg-Str. 1, 30625, Hannover, Germany
| | - Hans-Jürgen Wester
- Department of Radiopharmaceutical Chemistry, Technical University of Munich, Munich, Germany
| | - Tobias L Ross
- Department of Nuclear Medicine, Hannover Medical School, Carl Neuberg-Str. 1, 30625, Hannover, Germany
| | | | - Frank M Bengel
- Department of Nuclear Medicine, Hannover Medical School, Carl Neuberg-Str. 1, 30625, Hannover, Germany
| | - James T Thackeray
- Department of Nuclear Medicine, Hannover Medical School, Carl Neuberg-Str. 1, 30625, Hannover, Germany.
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Hermanns N, Bascunana P, Polyak A, Ross T, Bengel F, Thackeray J. Multimodality Imaging of the Brain-Heart-Axis after Ischemic Stroke Reveals Acute and Chronic Cardiac Dysfunction after Cerebral Ischemia. Eur Heart J Cardiovasc Imaging 2021. [DOI: 10.1093/ehjci/jeab111.082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): DFG; Ev Studienwerk Villigst
Introduction
Cerebral ischemia remains a major contributor to global morbidity and mortality. Beyond neurological dysfunction, cerebral stroke also increases risk of subsequent cardiac events and development of chronic heart failure. The mechanisms underlying this brain-heart communication are poorly characterized, but systemic inflammation is thought to play a role.
Purpose
We hypothesized that cerebral ischemic stroke evokes systemic inflammation contributing to acute cardiac stress and persistent contractile dysfunction, which may be monitored by serial molecular imaging by positron emission tomography (PET).
Methods
C57Bl6 mice underwent transient (30min) intraluminal middle cerebral artery occlusion (MCAo, n = 88) to induce stroke or sham surgery (n = 18). Serial 18F-GE180 PET at 24h, 7d, and 21d after injury identified translocator protein (TSPO) in brain microglia and peripheral macrophages as a marker of inflammation. Magnetic resonance imaging (MRI) determined stroke size and characterized cardiac function at 1 and 3wk after MCAo. Imaging signals were confirmed by autoradiography, immunohistochemistry and fluorescence-activated cell sorting.
Results
MCAo in mice induced cerebral stroke of variable size (median 44.68mm3, range:5.12-139.60mm3). Localized inflammation in the injured hemisphere was observed by TSPO PET covering territory consistent to the stroke location, with marked increase in the neuroinflammatory signal at 7d relative to the contralateral hemisphere (% injected dose (ID)/g max: 3.82 ± 0.84 vs 2.51 ± 0.32, p < 0.001). TSPO signal was similarly elevated in the stroke region compared to sham animals (%ID/g max: 3.82 ± 0.84 vs 2.59 ± 0.72, p < 0.001). Corresponding with neuroinflammation, a heightened global myocardial TSPO signal was observed 7d after MCAo compared to sham (%ID/g: 7.75 ± 2.79 vs 5.61 ± 1.98, p = 0.041). TSPO PET signal remained elevated 21d after stroke in brain (3.20 ± 1.15 vs 2.46 ± 0.37, p = 0.012) and heart (8.62 ± 2.43 vs 5.85 ± 0.66, p = 0.022). Cerebral stroke was associated with reduced contractile function compared to sham at 1wk (ejection fraction, EF: 49.58 ± 16.90 vs 62.17 ± 5.25%, p = 0.025) and 3wk (54.30 ± 5.70 vs 66.06 ± 3.48%, p = 0.009). Larger stroke size identified early after injury by T2 weighted MRI, reflecting the focal injury and penumbra edema, correlated with worse subsequent cardiac function at 21d (r = 0.745, p = 0.009). Despite increased TSPO signal, flow cytometry showed comparable CD45+ leukocyte content in the left ventricle after MCAo compared to sham at 7d (p = 0.749).
Conclusions
Ischemic stroke evoked parallel cerebral and cardiac TSPO upregulation and persistent contractile dysfunction, beginning early after injury. The extent and severity of brain injury predicts left ventricle dysfunction, but the role of inflammation requires further investigation. Molecular imaging may identify risk and guide novel therapies to improve cardiac outcome after stroke.
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Affiliation(s)
- N Hermanns
- Hannover Medical School, Department of Nuclear Medicine, Hannover, Germany
| | - P Bascunana
- Hannover Medical School, Department of Nuclear Medicine, Hannover, Germany
| | - A Polyak
- Hannover Medical School, Department of Nuclear Medicine, Hannover, Germany
| | - T Ross
- Hannover Medical School, Department of Nuclear Medicine, Hannover, Germany
| | - F Bengel
- Hannover Medical School, Department of Nuclear Medicine, Hannover, Germany
| | - J Thackeray
- Hannover Medical School, Department of Nuclear Medicine, Hannover, Germany
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Polyak A, Bankstahl JP, Besecke KFW, Hozsa C, Triebert W, Pannem RR, Manstein F, Borcholte T, Furch M, Zweigerdt R, Gieseler RK, Bengel FM, Ross TL. Simplified 89Zr-Labeling Protocol of Oxine (8-Hydroxyquinoline) Enabling Prolonged Tracking of Liposome-Based Nanomedicines and Cells. Pharmaceutics 2021; 13:pharmaceutics13071097. [PMID: 34371788 PMCID: PMC8309181 DOI: 10.3390/pharmaceutics13071097] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/07/2021] [Accepted: 07/14/2021] [Indexed: 01/11/2023] Open
Abstract
In this work, a method for the preparation of the highly lipophilic labeling synthon [89Zr]Zr(oxinate)4 was optimized for the radiolabeling of liposomes and human induced pluripotent stem cells (hiPSCs). The aim was to establish a robust and reliable labeling protocol for enabling up to one week positron emission tomography (PET) tracing of lipid-based nanomedicines and transplanted or injected cells, respectively. [89Zr]Zr(oxinate)4 was prepared from oxine (8-hydroxyquinoline) and [89Zr]Zr(OH)2(C2O4). Earlier introduced liquid-liquid extraction methods were simplified by the optimization of buffering, pH, temperature and reaction times. For quality control, thin-layer chromatography (TLC), size-exclusion chromatography (SEC) and centrifugation were employed. Subsequently, the 89Zr-complex was incorporated into liposome formulations. PET/CT imaging of 89Zr-labeled liposomes was performed in healthy mice. Cell labeling was accomplished in PBS using suspensions of 3 × 106 hiPSCs, each. [89Zr]Zr(oxinate)4 was synthesized in very high radiochemical yields of 98.7% (96.8% ± 2.8%). Similarly, high internalization rates (≥90%) of [89Zr]Zr(oxinate)4 into liposomes were obtained over an 18 h incubation period. MicroPET and biodistribution studies confirmed the labeled nanocarriers' in vivo stability. Human iPSCs incorporated the labeling agent within 30 min with ~50% efficiency. Prolonged PET imaging is an ideal tool in the development of lipid-based nanocarriers for drug delivery and cell therapies. To this end, a reliable and reproducible 89Zr radiolabeling method was developed and tested successfully in a model liposome system and in hiPSCs alike.
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Affiliation(s)
- Andras Polyak
- Department of Nuclear Medicine, Hannover Medical School, 30625 Hannover, Germany; (J.P.B.); (F.M.B.); (T.L.R.)
- Correspondence:
| | - Jens P. Bankstahl
- Department of Nuclear Medicine, Hannover Medical School, 30625 Hannover, Germany; (J.P.B.); (F.M.B.); (T.L.R.)
| | - Karen F. W. Besecke
- Rodos Biotarget GmbH, Medical Park Hannover, 30625 Hannover, Germany; (K.F.W.B.); (C.H.); (R.R.P.); (T.B.); (M.F.); (R.K.G.)
- SolMic BioTech GmbH, 40225 Düsseldorf, Germany
| | - Constantin Hozsa
- Rodos Biotarget GmbH, Medical Park Hannover, 30625 Hannover, Germany; (K.F.W.B.); (C.H.); (R.R.P.); (T.B.); (M.F.); (R.K.G.)
| | - Wiebke Triebert
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), 30625 Hannover, Germany; (W.T.); (F.M.); (R.Z.)
- Department of Cardiac, Thoracic, Transplantation and Vascular Surgery (HTTG), Hannover Medical School, 30625 Hannover, Germany
| | - Rajeswara Rao Pannem
- Rodos Biotarget GmbH, Medical Park Hannover, 30625 Hannover, Germany; (K.F.W.B.); (C.H.); (R.R.P.); (T.B.); (M.F.); (R.K.G.)
- Bioloving GmbH & Co KG, 69126 Heidelberg, Germany
| | - Felix Manstein
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), 30625 Hannover, Germany; (W.T.); (F.M.); (R.Z.)
- Department of Cardiac, Thoracic, Transplantation and Vascular Surgery (HTTG), Hannover Medical School, 30625 Hannover, Germany
| | - Thomas Borcholte
- Rodos Biotarget GmbH, Medical Park Hannover, 30625 Hannover, Germany; (K.F.W.B.); (C.H.); (R.R.P.); (T.B.); (M.F.); (R.K.G.)
| | - Marcus Furch
- Rodos Biotarget GmbH, Medical Park Hannover, 30625 Hannover, Germany; (K.F.W.B.); (C.H.); (R.R.P.); (T.B.); (M.F.); (R.K.G.)
- SolMic BioTech GmbH, 40225 Düsseldorf, Germany
- Bioloving GmbH & Co KG, 69126 Heidelberg, Germany
| | - Robert Zweigerdt
- Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), 30625 Hannover, Germany; (W.T.); (F.M.); (R.Z.)
- Department of Cardiac, Thoracic, Transplantation and Vascular Surgery (HTTG), Hannover Medical School, 30625 Hannover, Germany
| | - Robert K. Gieseler
- Rodos Biotarget GmbH, Medical Park Hannover, 30625 Hannover, Germany; (K.F.W.B.); (C.H.); (R.R.P.); (T.B.); (M.F.); (R.K.G.)
- Department of Internal Medicine, and Laboratory of Immunology & Molecular Biology, University Hospital, Knappschaftskrankenhaus, Ruhr University Bochum, 44801 Bochum, Germany
| | - Frank M. Bengel
- Department of Nuclear Medicine, Hannover Medical School, 30625 Hannover, Germany; (J.P.B.); (F.M.B.); (T.L.R.)
| | - Tobias L. Ross
- Department of Nuclear Medicine, Hannover Medical School, 30625 Hannover, Germany; (J.P.B.); (F.M.B.); (T.L.R.)
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8
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Schidlitzki A, Bascuñana P, Srivastava PK, Welzel L, Twele F, Töllner K, Käufer C, Gericke B, Feleke R, Meier M, Polyak A, Ross TL, Gerhauser I, Bankstahl JP, Johnson MR, Bankstahl M, Löscher W. Proof-of-concept that network pharmacology is effective to modify development of acquired temporal lobe epilepsy. Neurobiol Dis 2019; 134:104664. [PMID: 31678583 DOI: 10.1016/j.nbd.2019.104664] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 08/06/2019] [Revised: 10/08/2019] [Accepted: 10/30/2019] [Indexed: 10/25/2022] Open
Abstract
Epilepsy is a complex network phenomenon that, as yet, cannot be prevented or cured. We recently proposed network-based approaches to prevent epileptogenesis. For proof of concept we combined two drugs (levetiracetam and topiramate) for which in silico analysis of drug-protein interaction networks indicated a synergistic effect on a large functional network of epilepsy-relevant proteins. Using the intrahippocampal kainate mouse model of temporal lobe epilepsy, the drug combination was administered during the latent period before onset of spontaneous recurrent seizures (SRS). When SRS were periodically recorded by video-EEG monitoring after termination of treatment, a significant decrease in incidence and frequency of SRS was determined, indicating antiepileptogenic efficacy. Such efficacy was not observed following single drug treatment. Furthermore, a combination of levetiracetam and phenobarbital, for which in silico analysis of drug-protein interaction networks did not indicate any significant drug-drug interaction, was not effective to modify development of epilepsy. Surprisingly, the promising antiepileptogenic effect of the levetiracetam/topiramate combination was obtained in the absence of any significant neuroprotective or anti-inflammatory effects as indicated by multimodal brain imaging and histopathology. High throughput RNA-sequencing (RNA-seq) of the ipsilateral hippocampus of mice treated with the levetiracetam/topiramate combination showed that several genes that have been linked previously to epileptogenesis, were significantly differentially expressed, providing interesting entry points for future mechanistic studies. Overall, we have discovered a novel combination treatment with promise for prevention of epilepsy.
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Affiliation(s)
- Alina Schidlitzki
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; Center for Systems Neuroscience, 30559 Hannover, Germany
| | - Pablo Bascuñana
- Department of Nuclear Medicine, Hannover Medical School, Germany
| | | | - Lisa Welzel
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; Center for Systems Neuroscience, 30559 Hannover, Germany
| | - Friederike Twele
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
| | - Kathrin Töllner
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
| | - Christopher Käufer
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
| | - Birthe Gericke
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; Center for Systems Neuroscience, 30559 Hannover, Germany
| | - Rahel Feleke
- Division of Brain Sciences, Imperial College London, London, UK
| | - Martin Meier
- Central Animal Facility & Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Andras Polyak
- Department of Nuclear Medicine, Hannover Medical School, Germany
| | - Tobias L Ross
- Department of Nuclear Medicine, Hannover Medical School, Germany
| | - Ingo Gerhauser
- Department of Pathology, University of Veterinary Medicine Hannover, Germany
| | - Jens P Bankstahl
- Department of Nuclear Medicine, Hannover Medical School, Germany
| | | | - Marion Bankstahl
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; Center for Systems Neuroscience, 30559 Hannover, Germany; Central Animal Facility & Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Wolfgang Löscher
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; Center for Systems Neuroscience, 30559 Hannover, Germany.
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9
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Bascuñana P, Gendron T, Sander K, Jahreis I, Polyak A, Ross TL, Bankstahl M, Arstad E, Bankstahl JP. Ex vivo characterization of neuroinflammatory and neuroreceptor changes during epileptogenesis using candidate positron emission tomography biomarkers. Epilepsia 2019; 60:2325-2333. [PMID: 31571210 DOI: 10.1111/epi.16353] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 06/11/2019] [Revised: 09/04/2019] [Accepted: 09/04/2019] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Identification of patients at risk of developing epilepsy before the first spontaneous seizure may promote the development of preventive treatment providing opportunity to stop or slow down the disease. METHODS As development of novel radiotracers and on-site setup of existing radiotracers is highly time-consuming and expensive, we used dual-centre in vitro autoradiography as an approach to characterize the potential of innovative radiotracers in the context of epilepsy development. Using brain slices from the same group of rats, we aimed to characterise the evolution of neuroinflammation and expression of inhibitory and excitatory neuroreceptors during epileptogenesis using translational positron emission tomography (PET) tracers; 18 F-flumazenil (18 F-FMZ; GABAA receptor), 18 F-FPEB (metabotropic glutamate receptor 5; mGluR5), 18 F-flutriciclamide (translocator protein; TSPO, microglia activation) and 18 F-deprenyl (monoamine oxidase B, astroglia activation). Autoradiography images from selected time points after pilocarpine-induced status epilepticus (SE; baseline, 24 and 48 hours, 5, 10 and 15 days and 6 and 12-14 weeks after SE) were normalized to a calibration curve, co-registered to an MRI-based 2D region-of-interest atlas, and activity concentration (Bq/mm2 ) was calculated. RESULTS In epileptogenesis-associated brain regions, 18 F-FMZ and 18 F-FPEB showed an early decrease after SE. 18 F-FMZ decrease was maintained in the latent phase and further reduced in the chronic epileptic animals, while 18 F-FPEB signal recovered from day 10, reaching baseline levels in chronic epilepsy. 18 F-flutriciclamide showed an increase of activated microglia at 24 hours after SE, peaking at 5-15 days and decreasing during the chronic phase. On the other hand, 18 F-deprenyl autoradiography showed late astrogliosis, peaking in the chronic phase. SIGNIFICANCE Autoradiography revealed different evolution of the selected targets during epileptogenesis. Our results suggest an advantage of combined imaging of inter-related targets like glutamate and GABAA receptors, or microglia and astrocyte activation, in order to identify important interactions, especially when using PET imaging for the evaluation of novel treatments.
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Affiliation(s)
- Pablo Bascuñana
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
| | - Thibault Gendron
- Institute of Nuclear Medicine, University College London, London, UK.,Department of Chemistry, University College London, London, UK
| | - Kerstin Sander
- Institute of Nuclear Medicine, University College London, London, UK.,Department of Chemistry, University College London, London, UK
| | - Ina Jahreis
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany.,Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine, Hannover, Germany
| | - Andras Polyak
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
| | - Tobias L Ross
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
| | - Marion Bankstahl
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine, Hannover, Germany.,Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | - Erik Arstad
- Institute of Nuclear Medicine, University College London, London, UK.,Department of Chemistry, University College London, London, UK
| | - Jens P Bankstahl
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
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10
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Polyak A, Ross TL. Nanoparticles for SPECT and PET Imaging: Towards Personalized Medicine and Theranostics. Curr Med Chem 2019; 25:4328-4353. [PMID: 28875837 DOI: 10.2174/0929867324666170830095553] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [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: 09/22/2016] [Revised: 07/24/2017] [Accepted: 07/26/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND PET and SPECT imaging methods can be of excellent assistance for the development of new nanoparticle drug delivery systems, and at the same time, these investigations also offer the opportunity to produce exceptional new diagnostic and therapeutic radiopharmaceuticals, as well. With a multifunctional, nano-scaled drug delivery system, the diagnostic (imaging) methods and the therapy (delivering drugs or beta-emitter radionuclides) can be carried out using the same biological and pharmacological mechanisms. By combining therapy and diagnostics in one method or in one specifically targeted nanoparticle system, we can product theranostic pharmaceuticals, and its applications are important elements of personalized medicine. OBJECTIVES This review takes a short historical look back to the radiocolloids, the great ancestors of (radiolabeled) nanoparticles and then describes the general features of current types of PET and SPECT imaging associated nanoparticle-based products and key radiolabeling methods; entering into details of potential prospective challenges related to radiotheranostic approaches and imaging guided therapy.
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Affiliation(s)
- Andras Polyak
- Radiopharmaceutical Chemistry, Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
| | - Tobias L Ross
- Radiopharmaceutical Chemistry, Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
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11
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Polyak A, Farkas A, Morvay N, Agoston G, Varga A, Lepran I, Baczko I, Varro A, Farkas AS. P475Investigation of cardiac morphological and electrophysiological changes of dogs after long time intensive exercise. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy060.333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- A Polyak
- University of Szeged, 2nd Department of Medicine and Cardiology Centre, Faculty of Medicine, Szeged, Hungary
| | - A Farkas
- University of Szeged, 2nd Department of Medicine and Cardiology Centre, Faculty of Medicine, Szeged, Hungary
| | - N Morvay
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, Hungary
| | - G Agoston
- University of Szeged, Institute of Family Medicine, Szeged, Hungary
| | - A Varga
- University of Szeged, Institute of Family Medicine, Szeged, Hungary
| | - I Lepran
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, Hungary
| | - I Baczko
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, Hungary
| | - A Varro
- University of Szeged, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Szeged, Hungary
| | - A S Farkas
- University of Szeged, 2nd Department of Medicine and Cardiology Centre, Faculty of Medicine, Szeged, Hungary
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12
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Regev A, Takacs H, Farkas AS, Rarosi F, Polyak A, Papp H, Ivany E, Papp JG, Varro A, Farkas A. Application of ventricular tachyarrhythmia definitions of the updated Lambeth Conventions provides incompatibility with earlier results, masks antifibrillatory activity and reduces inter-observer agreement. J Physiol Pharmacol 2018; 70. [PMID: 31019121 DOI: 10.26402/jpp.2019.1.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 02/28/2019] [Indexed: 11/03/2022]
Abstract
The Lambeth Conventions (LC I), a landmark guidance document for arrhythmia research was updated and arrhythmia definitions were changed in the new Lambeth Conventions II (LC II). This study examined whether the arrhythmia definitions of LC I and LC II yield the same qualitative results and whether LC II improves inter-observer agreement. Two independent investigators performed blinded arrhythmia analysis of the electrocardiograms of isolated, Langendorff rat hearts subjected to regional ischemia and perfused with Class I antiarrhythmics with 3 or 5 mM K+ in the perfusate. Data obtained with arrhythmia definitions of LC I and LC II were compared within and between observers. Applying ventricular fibrillation (VF) definition of LC II significantly increased VF incidence and reduced VF onset time irrespective of treatment by detecting 'de novo' VF episodes not found by LC I. LC II reduced the number of ventricular tachycardia (VT) episodes and simultaneously increased the number of VF episodes as compared with the respective values obtained according to LC I. Using VF definition of LC II masked the significant antifibrillatory effects of flecainide and the high K+ concentration identified with the VF definition of LC I. When VF incidence was tested, a very strong inter-observer agreement was found according to LC I, whereas using VF definition of LC II reduced inter-observer agreement. It is concluded that LC II shifts some tachyarrhythmias from VT to VF class, and thus results obtained by arrhythmia definitions of LC I and LC II are not compatible; VF definition of LC II may change the conclusion of pharmacological, physiological and pathophysiological arrhythmia investigations and may reduce inter-observer agreement. Thus, VT and VF definitions of LC II should be amended in order to increase compatibility and inter-observer agreement.
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Affiliation(s)
- A Regev
- Second Department of Medicine and Cardiology Centre, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - H Takacs
- Second Department of Medicine and Cardiology Centre, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - A S Farkas
- Second Department of Medicine and Cardiology Centre, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - F Rarosi
- Department of Medical Physics and Informatics, University of Szeged, Szeged, Hungary.,Bolyai Institute, University of Szeged, Szeged, Hungary
| | - A Polyak
- Second Department of Medicine and Cardiology Centre, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - H Papp
- Second Department of Medicine and Cardiology Centre, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - E Ivany
- Second Department of Medicine and Cardiology Centre, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - J G Papp
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Szeged, Szeged, Hungary.,MTA-SZTE Research Group for Cardiovascular Pharmacology, Hungarian Academy of Sciences, Szeged, Hungary
| | - A Varro
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Szeged, Szeged, Hungary.,MTA-SZTE Research Group for Cardiovascular Pharmacology, Hungarian Academy of Sciences, Szeged, Hungary
| | - A Farkas
- Second Department of Medicine and Cardiology Centre, Faculty of Medicine, University of Szeged, Szeged, Hungary.
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13
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Rangger C, Klingler M, Balogh L, Pöstényi Z, Polyak A, Pawlak D, Mikołajczak R, von Guggenberg E. 177Lu Labeled Cyclic Minigastrin Analogues with Therapeutic Activity in CCK2R Expressing Tumors: Preclinical Evaluation of a Kit Formulation. Mol Pharm 2017; 14:3045-3058. [PMID: 28728415 DOI: 10.1021/acs.molpharmaceut.7b00241] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 12/13/2022]
Abstract
Minigastrin (MG) analogues specifically target cholecystokinin-2 receptors (CCK2R) expressed in different tumors and enable targeted radiotherapy of advanced and disseminated disease when radiolabeled with a beta emitter such as 177Lu. Especially truncated MG analogues missing the penta-Glu sequence are associated with low kidney retention and seem therefore most promising for therapeutic use. Based on [d-Glu1,desGlu2-6]MG (MG11) we have designed the two cyclic MG analogues cyclo1,9[γ-d-Glu1,desGlu2-6,d-Lys9]MG (cyclo-MG1) and cyclo1,9[γ-d-Glu1,desGlu2-6,d-Lys9,Nle11]MG (cyclo-MG2). In the present work we have developed and preclinically evaluated a pharmaceutical kit formulation for the labeling with 177Lu of the two DOTA-conjugated cyclic MG analogues. The stability of the kits during storage as well as the stability of the radiolabeled peptides was investigated. A cell line stably transfected with human CCK2R and a control cell line without receptor expression were used for in vitro and in vivo studies with the radioligands prepared from kit formulations. In terms of stability 177Lu-DOTA-cyclo-MG2 showed advantages over 177Lu-DOTA-cyclo-MG1. Still, for both radioligands a high receptor-mediated cell uptake and favorable pharmacokinetic profile combining receptor-specific tumor uptake with low unspecific tissue uptake and low kidney retention were confirmed. Investigating the therapy efficacy and treatment toxicity in xenografted BALB/c nude mice a receptor-specific and comparable therapeutic effect could be demonstrated for both radioligands. A 1.7- to 2.6-fold increase in tumor volume doubling time was observed for receptor-positive tumors in treated versus untreated animals, which was 39-73% higher when compared to receptor-negative tumors. The treatment was connected with transient bone marrow toxicity and minor signs of kidney toxicity. All together the obtained results support further studies for the clinical translation of this new therapeutic approach.
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Affiliation(s)
- Christine Rangger
- Department of Nuclear Medicine, Medical University of Innsbruck , 6020 Innsbruck, Austria
| | - Maximilian Klingler
- Department of Nuclear Medicine, Medical University of Innsbruck , 6020 Innsbruck, Austria
| | - Lajos Balogh
- Department of Nuclear Medicine and Translational Biological Sciences, OKK-OSSKI , 1221 Budapest, Hungary
| | - Zita Pöstényi
- Department of Nuclear Medicine and Translational Biological Sciences, OKK-OSSKI , 1221 Budapest, Hungary
| | - Andras Polyak
- Department of Nuclear Medicine and Translational Biological Sciences, OKK-OSSKI , 1221 Budapest, Hungary
| | - Dariusz Pawlak
- Radioisotope Centre POLATOM, National Centre for Nuclear Research , 05-400 Otwock, Poland
| | - Renata Mikołajczak
- Radioisotope Centre POLATOM, National Centre for Nuclear Research , 05-400 Otwock, Poland
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14
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Polyak A, Naszalyi Nagy L, Mihaly J, Görres S, Wittneben A, Leiter I, Bankstahl JP, Sajti L, Kellermayer M, Zrínyi M, Ross TL. Preparation and 68Ga-radiolabeling of porous zirconia nanoparticle platform for PET/CT-imaging guided drug delivery. J Pharm Biomed Anal 2017; 137:146-150. [PMID: 28119212 DOI: 10.1016/j.jpba.2017.01.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 01/09/2017] [Accepted: 01/12/2017] [Indexed: 11/18/2022]
Abstract
This paper describes the preparation of gallium-68 (68Ga) isotope labeled porous zirconia (ZrO2) nanoparticle (NP) platform of nearly 100nm diameter and its first pharmacokinetic and biodistribution evaluation accomplished with a microPET/CT (μPet/CT) imaging system. Objectives of the investigations were to provide a nanoparticle platform which can be suitable for specific delivery of various therapeutic drugs using surface attached specific molecules as triggering agents, and at the same time, suitable for positron emission tomography (PET) tracing of the prospective drug delivery process. Radiolabeling was accomplished using DOTA bifunctional chelator. DOTA was successfully adsorbed onto the surface of nanoparticles, while the 68Ga-radiolabeling method proved to be simple and effective. In the course of biodistribution studies, the 68Ga-labeled DOTA-ZrNPs showed proper radiolabeling stability in their original suspension and in blood serum. μPet/CT imaging studies confirmed a RES-biodistribution profile indicating stable nano-sized labeled particles in vivo. Results proved that the new method offers the opportunity to examine further specifically targeted and drug payload carrier variants of zirconia NP systems using PET/CT imaging.
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Affiliation(s)
- Andras Polyak
- Department of Nuclear Medicine, Hannover Medical School, Carl-Neuberg Str 1, 30627 Hannover, Germany.
| | - Lívia Naszalyi Nagy
- MTA-SE Molecular Biophysics Research Group, Semmelweis University, Tűzoltó Str 37-47, H-1094 Budapest, Hungary; Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar Tudósok Blvd 2, H-1117 Budapest, Hungary
| | - Judith Mihaly
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar Tudósok Blvd 2, H-1117 Budapest, Hungary
| | - Sebastian Görres
- Department of Nuclear Medicine, Hannover Medical School, Carl-Neuberg Str 1, 30627 Hannover, Germany
| | - Alexander Wittneben
- Department of Nuclear Medicine, Hannover Medical School, Carl-Neuberg Str 1, 30627 Hannover, Germany
| | - Ina Leiter
- Department of Nuclear Medicine, Hannover Medical School, Carl-Neuberg Str 1, 30627 Hannover, Germany; Institute for Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine, Hannover Bünteweg 2, 30559 Hannover Germany
| | - Jens P Bankstahl
- Department of Nuclear Medicine, Hannover Medical School, Carl-Neuberg Str 1, 30627 Hannover, Germany
| | - Laszlo Sajti
- Nanotechnology Department, Laser Zentrum Hannover e.V., Hollerithallee 8, D-30419 Hannover, Germany
| | - Miklós Kellermayer
- MTA-SE Molecular Biophysics Research Group, Semmelweis University, Tűzoltó Str 37-47, H-1094 Budapest, Hungary
| | - Miklós Zrínyi
- MTA-SE Molecular Biophysics Research Group, Semmelweis University, Tűzoltó Str 37-47, H-1094 Budapest, Hungary; Nanochemistry Research Group, Semmelweis University, Nagyvárad Sqr 4, 1089 Budapest, Hungary
| | - Tobias L Ross
- Department of Nuclear Medicine, Hannover Medical School, Carl-Neuberg Str 1, 30627 Hannover, Germany
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15
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Polyak A, Nagy LN, Drotár E, Dabasi G, Jóba RP, Pöstényi Z, Mikolajczak R, Bóta A, Balogh L. Lu-177-Labeled Zirconia Particles for Radiation Synovectomy. Cancer Biother Radiopharm 2016; 30:433-8. [PMID: 26683134 DOI: 10.1089/cbr.2015.1881] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [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: 11/13/2022] Open
Abstract
The present article describes the preparation of β-emitter lutetium-177-labeled zirconia colloid and its preliminary physicochemical and biological evaluation of suitability for local radionuclide therapy. The new (177)Lu-labeled therapeutic radiopharmaceutical candidate was based on the synthesis mode of a previously described zirconia nanoparticle system. The size and shape of the developed radiopharmaceutical compound were observed through a scanning electron microscope and dynamic light scattering methods. The radiocolloid had a 1.7 μm mean diameter and showed high in vitro radiochemical and colloid size stability at room temperature and during the blood sera stability test. After the in vitro characterizations, the product was investigated in the course of the treatment of a spontaneously diseased dog veterinary patient's hock joint completed with single-photon emission computed tomography (SPECT) imaging follow-up measurements and a dual-isotope SPECT imaging tests with conventional (99m)Tc-methanediphosphonic acid bone scintigraphy. In the treated dog, no clinical side-effects or signs of histopathological changes of the joints were recorded during the treatment. SPECT follow-up studies clearly and conspicuously showed the localization of the (177)Lu-labeled colloid in the hock joint as well as detectable but negligible leakages of the radiocolloid in the nearest lymph node. On the basis of biological follow-up tests, the orthopedic team assumed that the (177)Lu-labeled zirconia colloid-based local radionuclide therapy resulted in a significant and long-term improvement in clinical signs of the patient without any remarkable side-effects.
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Affiliation(s)
- Andras Polyak
- 1 National Research Institute for Radiobiology and Radiohygiene (NRIRR) , Budapest, Hungary
| | - Lívia Naszályi Nagy
- 2 Institute of Materials and Environmental Chemistry , Research Centre for Natural Sciences, Hungarian Academy of Sciences (IMEC RCNS HAS), Budapest, Hungary
| | - Eszter Drotár
- 2 Institute of Materials and Environmental Chemistry , Research Centre for Natural Sciences, Hungarian Academy of Sciences (IMEC RCNS HAS), Budapest, Hungary
| | - Gabriella Dabasi
- 3 Department of Nuclear Medicine, Semmelweis University , Budapest, Hungary
| | - Róbert P Jóba
- 3 Department of Nuclear Medicine, Semmelweis University , Budapest, Hungary
| | - Zita Pöstényi
- 1 National Research Institute for Radiobiology and Radiohygiene (NRIRR) , Budapest, Hungary
| | - Renata Mikolajczak
- 4 Radioisotope Centre Polatom, National Centre of Nuclear Research , Otwock, Poland
| | - Attila Bóta
- 2 Institute of Materials and Environmental Chemistry , Research Centre for Natural Sciences, Hungarian Academy of Sciences (IMEC RCNS HAS), Budapest, Hungary
| | - Lajos Balogh
- 1 National Research Institute for Radiobiology and Radiohygiene (NRIRR) , Budapest, Hungary
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16
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Gowran A, Kulikova T, Lewis FC, Foldes G, Fuentes L, Viiri LE, Spinelli V, Costa A, Perbellini F, Sid-Otmane C, Bax NAM, Pekkanen-Mattila M, Schiano C, Chaloupka A, Forini F, Sarkozy M, De Jager SCA, Vajen T, Glezeva N, Lee HW, Golovkin A, Kucera T, Musikhina NA, Korzhenkov NP, Santuchi MDEC, Munteanu D, Garcia RG, Ang R, Usui S, Kamilova U, Jumeau C, Aberg M, Kostina DA, Brandt MM, Muntean D, Lindner D, Sadaba R, Bacova B, Nikolov A, Sedmera D, Ryabov V, Neto FP, Lynch M, Portero V, Kui P, Howarth FC, Gualdoni A, Prorok J, Diolaiuti L, Vostarek F, Wagner M, Abela MA, Nebert C, Xiang W, Kloza M, Maslenko A, Grechanyk M, Bhattachariya A, Morawietz H, Babaeva AR, Martinez Sanchez SM, Krychtiuk KA, Starodubova J, Fiorelli S, Rinne P, Ozkaramanli Gur D, Hofbauer T, Starodubova J, Stellos K, Pinon P, Tsoref O, Thaler B, Fraga-Silva RA, Fuijkschot WW, Shaaban MNS, Matthaeus C, Deluyker D, Scardigli M, Zahradnikova A, Dominguez A, Kondrat'eva D, Sosorburam T, Murarikova M, Duerr GD, Griecsova L, Portnichenko VI, Smolina N, Duicu OANAM, Elder JM, Zaglia T, Lorenzon A, Ruperez C, Woudstra L, Suffee N, De Lucia C, Tsoref O, Russell-Hallinan A, Menendez-Montes I, Kapelko VI, Emmens RW, Hetman O, Van Der Laarse WJ, Goncharov S, Adao R, Huisamen B, Sirenko O, Kamilova U, Nassiri I, Tserendavaa SUMIYA, Yushko K, Baldan Martin M, Falcone C, Vigorelli V, Nigro P, Pompilio G, Stepanova O, Valikhov M, Samko A, Masenko V, Tereschenko S, Teoh T, Domenjo-Vila E, Theologou T, Field M, Awad W, Yasin M, Nadal-Ginard B, Ellison-Hughes GM, Hellen N, Vittay O, Harding SE, Gomez-Cid L, Fernandez-Santos ME, Suarez-Sancho S, Plasencia V, Climent A, Sanz-Ruiz R, Hedhammar M, Atienza F, Fernandez-Aviles F, Kiamehr M, Oittinen M, Viiri KM, Kaikkonen M, Aalto-Setala K, Diolaiuti L, Laurino A, Sartiani L, Vona A, Zanardelli M, Cerbai E, Failli P, Hortigon-Vinagre MP, Van Der Heyden M, Burton FL, Smith GL, Watson S, Scigliano M, Tkach S, Alayoubi S, Harding SE, Terracciano CM, Ly HQ, Mauretti A, Van Marion MH, Van Turnhout MC, Van Der Schaft DWJ, Sahlgren CM, Goumans MJ, Bouten CVC, Vuorenpaa H, Penttinen K, Sarkanen R, Ylikomi T, Heinonen T, Aalto-Setala K, Grimaldi V, Aprile M, Esposito R, Maiello C, Soricelli A, Colantuoni V, Costa V, Ciccodicola A, Napoli C, Rowe GC, Johnson K, Arany ZP, Del Monte F, D'aurizio R, Kusmic C, Nicolini G, Baumgart M, Groth M, Ucciferri N, Iervasi G, Pitto L, Pipicz M, Gaspar R, Siska A, Foldesi I, Kiss K, Bencsik P, Thum T, Batkai S, Csont T, Haan JJ, Bosch L, Brans MAD, Van De Weg SM, Deddens JC, Lee SJ, Sluijter JPG, Pasterkamp G, Werner I, Projahn D, Staudt M, Curaj A, Soenmez TT, Simsekyilmaz S, Hackeng TM, Von Hundelshausen P, Koenen RR, Weber C, Liehn EA, Santos-Martinez M, Medina C, Watson C, Mcdonald K, Gilmer J, Ledwidge M, Song SH, Lee MY, Park MH, Choi JC, Ahn JH, Park JS, Oh JH, Choi JH, Lee HC, Cha KS, Hong TJ, Kudryavtsev I, Serebryakova M, Malashicheva A, Shishkova A, Zhiduleva E, Moiseeva O, Durisova M, Blaha M, Melenovsky V, Pirk J, Kautzner J, Petelina TI, Gapon LI, Gorbatenko EA, Potolinskaya YV, Arkhipova EV, Solodenkova KS, Osadchuk MA, Dutra MF, Oliveira FCB, Silva MM, Passos-Silva DG, Goncalves R, Santos RAS, Da Silva RF, Gavrilescu CM, Paraschiv CM, Manea P, Strat LC, Gomez JMG, Merino D, Hurle MA, Nistal JF, Aires A, Cortajarena AL, Villar AV, Abramowitz J, Birnbaumer L, Gourine AV, Tinker A, Takamura M, Takashima S, Inoue O, Misu H, Takamura T, Kaneko S, Alieva TOHIRA, Mougenot N, Dufilho M, Hatem S, Siegbahn A, Kostina AS, Uspensky VE, Moiseeva OM, Kostareva AA, Malashicheva AB, Van Dijk CGM, Chrifi I, Verhaar MC, Duncker DJ, Cheng C, Sturza A, Petrus A, Duicu O, Kiss L, Danila M, Baczko I, Jost N, Gotzhein F, Schon J, Schwarzl M, Hinrichs S, Blankenberg S, Volker U, Hammer E, Westermann D, Martinez-Martinez E, Arrieta V, Fernandez-Celis A, Jimenez-Alfaro L, Melero A, Alvarez-Asiain V, Cachofeiro V, Lopez-Andres N, Tribulova N, Wallukat G, Knezl V, Radosinska J, Barancik M, Tsinlikov I, Tsinlikova I, Nicoloff G, Blazhev A, Pesevski Z, Kvasilova A, Stopkova T, Eckhardt A, Buffinton CM, Nanka O, Kercheva M, Suslova T, Gusakova A, Ryabova T, Markov V, Karpov R, Seemann H, Alcantara TC, Santuchi MDEC, Fonseca SG, Da Silva RF, Barallobre-Barreiro J, Oklu R, Fava M, Baig F, Yin X, Albadawi H, Jahangiri M, Stoughton J, Mayr M, Podliesna SP, Veerman CCV, Verkerk AOV, Klerk MK, Lodder EML, Mengarelli IM, Bezzina CRB, Remme CAR, Takacs H, Polyak A, Morvay N, Lepran I, Tiszlavicz L, Nagy N, Ordog B, Farkas A, Forster T, Varro A, Farkas AS, Jayaprakash P, Parekh K, Ferdous Z, Oz M, Dobrzynski H, Adrian TE, Landi S, Bonzanni M, D'souza A, Boyett M, Bucchi A, Baruscotti M, Difrancesco D, Barbuti A, Kui P, Takacs H, Oravecz K, Hezso T, Polyak A, Levijoki J, Pollesello P, Koskelainen T, Otsomaa L, Farkas AS, Papp JGY, Varro A, Toth A, Acsai K, Dini L, Mazzoni L, Sartiani L, Cerbai E, Mugelli A, Svatunkova J, Sedmera D, Deffge C, Baer C, Weinert S, Braun-Dullaeus RC, Herold J, Cassar AC, Zahra GZ, Pllaha EP, Dingli PD, Montefort SM, Xuereb RGX, Aschacher T, Messner B, Eichmair E, Mohl W, Reglin B, Rong W, Nitzsche B, Maibier M, Guimaraes P, Ruggeri A, Secomb TW, Pries AR, Baranowska-Kuczko M, Karpinska O, Kusaczuk M, Malinowska B, Kozlowska H, Demikhova N, Vynnychenko L, Prykhodko O, Grechanyk N, Kuryata A, Cottrill KA, Du L, Bjorck HM, Maleki S, Franco-Cereceda A, Chan SY, Eriksson P, Giebe S, Cockcroft N, Hewitt K, Brux M, Brunssen C, Tarasov AA, Davidov SI, Reznikova EA, Tapia Abellan A, Angosto Bazarra D, Pelegrin Vivancos P, Montoro Garcia S, Kastl SP, Pongratz T, Goliasch G, Gaspar L, Maurer G, Huber K, Dostal E, Pfaffenberger S, Oravec S, Wojta J, Speidl WS, Osipova I, Sopotova I, Eligini S, Cosentino N, Marenzi G, Tremoli E, Rami M, Ring L, Steffens S, Gur O, Gurkan S, Mangold A, Scherz T, Panzenboeck A, Staier N, Heidari H, Mueller J, Lang IM, Osipova I, Sopotova I, Gatsiou A, Stamatelopoulos K, Perisic L, John D, Lunella FF, Eriksson P, Hedin U, Zeiher A, Dimmeler S, Nunez L, Moure R, Marron-Linares G, Flores X, Aldama G, Salgado J, Calvino R, Tomas M, Bou G, Vazquez N, Hermida-Prieto M, Vazquez-Rodriguez JM, Amit U, Landa N, Kain D, Tyomkin D, David A, Leor J, Hohensinner PJ, Baumgartner J, Krychtiuk KA, Maurer G, Huber K, Baik N, Miles LA, Wojta J, Seeman H, Montecucco F, Da Silva AR, Costa-Fraga FP, Anguenot L, Mach FP, Santos RAS, Stergiopulos N, Da Silva RF, Kupreishvili K, Vonk ABA, Smulders YM, Van Hinsbergh VWM, Stooker W, Niessen HWM, Krijnen PAJ, Ashmawy MM, Salama MA, Elamrosy MZ, Juettner R, Rathjen FG, Bito V, Crocini C, Ferrantini C, Gabbrielli T, Silvestri L, Coppini R, Tesi C, Cerbai E, Poggesi C, Pavone FS, Sacconi L, Mackova K, Zahradnik I, Zahradnikova A, Diaz I, Sanchez De Rojas De Pedro E, Hmadcha K, Calderon Sanchez E, Benitah JP, Gomez AM, Smani T, Ordonez A, Afanasiev SA, Egorova MV, Popov SV, Wu Qing P, Cheng X, Carnicka S, Pancza D, Jasova M, Kancirova I, Ferko M, Ravingerova T, Wu S, Schneider M, Marggraf V, Verfuerth L, Frede S, Boehm O, Dewald O, Baumgarten G, Kim SC, Farkasova V, Gablovsky I, Bernatova I, Ravingerova T, Nosar V, Portnychenko A, Drevytska T, Mankovska I, Gogvadze V, Sejersen T, Kostareva A, Sturza A, Wolf A, Privistirescu A, Danila M, Muntean D, O ' Gara P, Sanchez-Alonso JL, Harding SE, Lyon AR, Prando V, Pianca N, Lo Verso F, Milan G, Pesce P, Sandri M, Mongillo M, Beffagna G, Poloni G, Dazzo E, Sabatelli P, Doliana R, Polishchuk R, Carnevale D, Lembo G, Bonaldo P, Braghetta P, Rampazzo A, Cairo M, Giralt M, Villarroya F, Planavila A, Biesbroek PS, Emmens RWE, Juffermans LJM, Van Der Wall AC, Van Rossum AC, Niessen JWM, Krijnen PAJ, Moor Morris T, Dilanian G, Farahmand P, Puceat M, Hatem S, Gambino G, Petraglia L, Elia A, Komici K, Femminella GD, D'amico ML, Pagano G, Cannavo A, Liccardo D, Koch WJ, Nolano M, Leosco D, Ferrara N, Rengo G, Amit U, Landa N, Kain D, Leor J, Neary R, Shiels L, Watson C, Baugh J, Palacios B, Escobar B, Alonso AV, Guzman G, Ruiz-Cabello J, Jimenez-Borreguero LJ, Martin-Puig S, Lakomkin VL, Lukoshkova EV, Abramov AA, Gramovich VV, Vyborov ON, Ermishkin VV, Undrovinas NA, Shirinsky VP, Smilde BJ, Woudstra L, Fong Hing G, Wouters D, Zeerleder S, Murk JL, Van Ham SM, Heymans S, Juffermans LJM, Van Rossum AC, Niessen JWM, Krijnen PAJ, Krakhmalova O, Van Groen D, Bogaards SJP, Schalij I, Portnichenko GV, Tumanovska LV, Goshovska YV, Lapikova-Bryhinska TU, Nagibin VS, Dosenko VE, Mendes-Ferreira P, Maia-Rocha C, Santos-Ribeiro D, Potus F, Breuils-Bonnet S, Provencher S, Bonnet S, Rademaker M, Leite-Moreira AF, Bras-Silva C, Lopes J, Kuryata O, Lusynets T, Alikulov I, Nourddine M, Azzouzi L, Habbal R, Tserendavaa SUMIYA, Enkhtaivan ODKHUU, Enkhtaivan ODKHUU, Shagdar ZORIGO, Shagdar ZORIGO, Malchinkhuu MUNKHZ, Malchinkhuu MUNLHZ, Koval S, Starchenko T, Mourino-Alvarez L, Gonzalez-Calero L, Sastre-Oliva T, Lopez JA, Vazquez J, Alvarez-Llamas G, Ruilope LUISM, De La Cuesta F, Barderas MG, Bozzini S, D'angelo A, Pelissero G. Poster session 3Cell growth, differentiation and stem cells - Heart511The role of the endocannabinoid system in modelling muscular dystrophy cardiac disease with induced pluripotent stem cells.512An emerging role of T lymphocytes in cardiac regenerative processes in heart failure due to dilated cardiomyopathy513Canonical wnt signaling reverses the ‘aged/senescent’ human endogenous cardiac stem cell phenotype514Hippo signalling modulates survival of human induced pluripotent stem cell-derived cardiomyocytes515Biocompatibility of mesenchymal stem cells with a spider silk matrix and its potential use as scaffold for cardiac tissue regeneration516A snapshot of genome-wide transcription in human induced pluripotent stem cell-derived hepatocyte-like cells (iPSC-HLCs)517Can NOS/sGC/cGK1 pathway trigger the differentiation and maturation of mouse embryonic stem cells (ESCs)?518Introduction of external Ik1 to human-induced pluripotent stem cell-derived cardiomyocytes via Ik1-expressing HEK293519Cell therapy of the heart studied using adult myocardial slices in vitro520Enhancement of the paracrine potential of human adipose derived stem cells when cultured as spheroid bodies521Mechanosensitivity of cardiomyocyte progenitor cells: the strain response in 2D and 3D environments522The effect of the vascular-like network on the maturation of the human induced pluripotent stem cell derived cardiomyocytes.Transcriptional control and RNA species - Heart525Gene expression regulation in heart failure: from pathobiology to bioinformatics526Human transcriptome in idiopathic dilated cardiomyopathy - a novel high throughput screening527A high-throghput approach unveils putative miRNA-mediated mitochondria-targeted cardioprotective circuits activated by T3 in the post ischemia reperfusion setting528The effect of uraemia on the expression of miR-212/132 and the calcineurin pathway in the rat heartCytokines and cellular inflammation - Heart531Lack of growth differentiation factor 15 aggravates adverse cardiac remodeling upon pressure-overload in mice532Blocking heteromerization of platelet chemokines ccl5 and cxcl4 reduces inflammation and preserves heart function after myocardial infarction533Is there an association between low-dose aspirin use and clinical outcome in HFPEF? Implications of modulating monocyte function and inflammatory mediator release534N-terminal truncated intracellular matrix metalloproteinase-2 expression in diabetic heart.535Expression of CD39 and CD73 on peripheral T-cell subsets in calcific aortic stenosis536Mast cells in the atrial myocardium of patients with atrial fibrillation: a comparison with patients in sinus rhythm539Characteristics of the inflammatory response in patients with coronary artery disease and arterial hypertension540Pro-inflammatory cytokines as cardiovascular events predictors in rheumatoid arthritis and asymptomatic atherosclerosis541Characterization of FVB/N murinic bone marrow-derived macrophage polarization into M1 and M2 phenotypes542The biological expression and thoracic anterior pain syndromeSignal transduction - Heart545The association of heat shock protein 90 and TGFbeta receptor I is involved in collagen production during cardiac remodelling in aortic-banded mice546Loss of the inhibitory GalphaO protein in the rostral ventrolateral medulla of the brainstem leads to abnormalities in cardiovascular reflexes and altered ventricular excitablitiy547Selenoprotein P regulates pressure overload-induced cardiac remodeling548Study of adenylyl cyclase activity in erythrocyte membranes in patients with chronic heart failure549Direct thrombin inhibitors inhibit atrial myocardium hypertrophy in a rat model of heart failure and atrial remodeling550Tissue factor / FVIIa transactivates the IGF-1R by a Src-dependent phosphorylation of caveolin-1551Notch signaling is differently altered in endothelial and smooth muscle cells of ascending aortic aneurysm patients552Frizzled 5 expression is essential for endothelial proliferation and migration553Modulation of vascular function and ROS production by novel synthetic benzopyran analogues in diabetes mellitusExtracellular matrix and fibrosis - Heart556Cardiac fibroblasts as inflammatory supporter cells trigger cardiac inflammation in heart failure557A role for galectin-3 in calcific aortic valve stenosis558Omega-3 polyunsaturated fatty acids- can they decrease risk for ventricular fibrillation?559Serum levels of elastin derived peptides and circulating elastin-antielastin immune complexes in sera of patients with coronary artery disease560Endocardial fibroelastosis is secondary to hemodynamic alterations in the chick model of hypoplastic left heart syndrome561Dynamics of serum levels of matrix metalloproteinases in primary anterior STEMI patients564Deletion of the alpha-7 nicotinic acetylcholine receptor changes the vascular remodeling induced by transverse aortic constriction in mice.565Extracellular matrix remodelling in response to venous hypertension: proteomics of human varicose veinsIon channels, ion exchangers and cellular electrophysiology - Heart568Microtubule-associated protein RP/EB family member 1 modulates sodium channel trafficking and cardiac conduction569Investigation of electrophysiological abnormalities in a rabbit athlete's heart model570Upregulation of expression of multiple genes in the atrioventricular node of streptozotocin-induced diabetic rat571miR-1 as a regulator of sinoatrial rhythm in endurance training adaptation572Selective sodium-calcium exchanger inhibition reduces myocardial dysfunction associated with hypokalaemia and ventricular fibrillation573Effect of racemic and levo-methadone on action potential of human ventricular cardiomyocytes574Acute temperature effects on the chick embryonic heart functionVasculogenesis, angiogenesis and arteriogenesis577Clinical improvement and enhanced collateral vessel growth after monocyte transplantation in mice578The role of HIF-1 alpha, VEGF and obstructive sleep apnoea in the development of coronary collateral circulation579Initiating cardiac repair with a trans-coronary sinus catheter intervention in an ischemia/reperfusion porcine animal model580Early adaptation of pre-existing collaterals after acute arteriolar and venular microocclusion: an in vivo study in chick chorioallantoic membraneEndothelium583EDH-type responses to the activator of potassium KCa2.3 and KCa3.1 channels SKA-31 in the small mesenteric artery from spontaneously hypertensive rats584The peculiarities of endothelial dysfunction in patients with chronic renocardial syndrome585Endothelial dysfunction, atherosclerosis of the carotid arteries and level of leptin in patient with coronary heart disease in combination with hepatic steatosis depend from body mass index.586Role of non-coding RNAs in thoracic aortic aneurysm associated with bicuspid aortic valve587Cigarette smoke extract abrogates atheroprotective effects of high laminar flow on endothelial function588The prognostic value of anti-connective tissue antibodies in coronary heart disease and asymptomatic atherosclerosis589Novel potential properties of bioactive peptides from spanish dry-cured ham on the endothelium.Lipids592Intermediate density lipoprotein is associated with monocyte subset distribution in patients with stable atherosclerosis593The characteristics of dyslipidemia in rheumatoid arthritisAtherosclerosis596Macrophages differentiated in vitro are heterogeneous: morphological and functional profile in patients with coronary artery disease597Palmitoylethanolamide promotes anti-inflammatory phenotype of macrophages and attenuates plaque formation in ApoE-/- mice598Amiodarone versus esmolol in the perioperative period: an in vitro study of coronary artery bypass grafts599BMPRII signaling of fibrocytes, a mesenchymal progenitor cell population, is increased in STEMI and dyslipidemia600The characteristics of atherogenesis and systemic inflammation in rheumatoid arthritis601Role of adenosine-to-inosine RNA editing in human atherosclerosis602Presence of bacterial DNA in thrombus aspirates of patients with myocardial infarction603Novel E-selectin binding polymers reduce atherosclerotic lesions in ApoE(-/-) mice604Differential expression of the plasminogen receptor Plg-RKT in monocyte and macrophage subsets - possible functional consequences in atherogenesis605Apelin-13 treatment enhances the stability of atherosclerotic plaques606Mast cells are increased in the media of coronary lesions in patients with myocardial infarction and favor atherosclerotic plaque instability607Association of neutrophil to lymphocyte ratio with presence of isolated coronary artery ectasiaCalcium fluxes and excitation-contraction coupling610The coxsackie- and adenovirus receptor (CAR) regulates calcium homeostasis in the developing heart611HMW-AGEs application acutely reduces ICaL in adult cardiomyocytes612Measuring electrical conductibility of cardiac T-tubular systems613Postnatal development of cardiac excitation-contraction coupling in rats614Role of altered Ca2+ homeostasis during adverse cardiac remodeling after ischemia/reperfusion615Experimental study of sarcoplasmic reticulum dysfunction and energetic metabolism in failing myocardium associated with diabetes mellitusHibernation, stunning and preconditioning618Volatile anesthetic preconditioning attenuates ischemic-reperfusion injury in type II diabetic patients undergoing on-pump heart surgery619The effect of early and delayed phase of remote ischemic preconditioning on ischemia-reperfusion injury in the isolated hearts of healthy and diabetic rats620Post-conditioning with 1668-thioate leads to attenuation of the inflammatory response and remodeling with less fibrosis and better left ventricular function in a murine model of myocardial infarction621Maturation-related changes in response to ischemia-reperfusion injury and in effects of classical ischemic preconditioning and remote preconditioningMitochondria and energetics624Phase changes in myocardial mitochondrial respiration caused by hypoxic preconditioning or periodic hypoxic training625Desmin mutations depress mitochondrial metabolism626Methylene blue modulates mitochondrial function and monoamine oxidases-related ROS production in diabetic rat hearts627Doxorubicin modulates the real-time oxygen consumption rate of freshly isolated adult rat and human ventricular cardiomyocytesCardiomyopathies and fibrosis630Effects of genetic or pharmacologic inhibition of the ubiquitin/proteasome system on myocardial proteostasis and cardiac function631Suppression of Wnt signalling in a desmoglein-2 transgenic mouse model for arrhythmogenic cardiomyopathy632Cold-induced cardiac hypertrophy is reversed after thermo-neutral deacclimatization633CD45 is a sensitive marker to diagnose lymphocytic myocarditis in endomyocardial biopsies of living patients and in autopsies634Atrial epicardial adipose tissue derives from epicardial progenitors635Caloric restriction ameliorates cardiac function, sympathetic cardiac innervation and beta-adrenergic receptor signaling in an experimental model of post-ischemic heart failure636High fat diet improves cardiac remodelling and function after extensive myocardial infarction in mice637Epigenetic therapy reduces cardiac hypertrophy in murine models of heart failure638Imbalance of the VHL/HIF signaling in WT1+ Epicardial Progenitors results in coronary vascular defects, fibrosis and cardiac hypertrophy639Diastolic dysfunction is the first stage of the developing heart failure640Colchicine aggravates coxsackievirus B3 infection in miceArterial and pulmonary hypertension642Osteopontin as a marker of pulmonary hypertension in patients with coronary heart disease combined with chronic obstructive pulmonary disease643Myocardial dynamic stiffness is increased in experimental pulmonary hypertension partly due to incomplete relaxation644Hypotensive effect of quercetin is possibly mediated by down-regulation of immunotroteasome subunits in aorta of spontaneously hypertensive rats645Urocortin-2 improves right ventricular function and attenuates experimental pulmonary arterial hypertension646A preclinical evaluation of the anti-hypertensive properties of an aqueous extract of Agathosma (Buchu)Biomarkers648The adiponectin level in hypertensive females with rheumatoid arthritis and its relationship with subclinical atherosclerosis649Markers for identification of renal dysfunction in the patients with chronic heart failure650cardio-hepatic syndromes in chronic heart failure: North Africa profile651To study other biomarkers that assess during myocardial infarction652Interconnections of apelin levels with parameters of lipid metabolism in hypertension patients653Plasma proteomics in hypertension: prediction and follow-up of albuminuria during chronic renin-angiotensin system suppression654Soluble RAGE levels in plasma of patients with cerebrovascular events. Cardiovasc Res 2016. [DOI: 10.1093/cvr/cvw150] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Bertrand R, Hamp I, Brönstrup M, Weck R, Lukacevic M, Polyak A, Ross TL, Gotthardt M, Plettenburg O, Derdau V. Synthesis of GPR40 targeting 3 H- and 18 F-probes towards selective beta cell imaging. J Labelled Comp Radiopharm 2016; 59:604-610. [PMID: 27282912 DOI: 10.1002/jlcr.3412] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 04/11/2016] [Accepted: 05/09/2016] [Indexed: 11/07/2022]
Abstract
Diabetes affects an increasing number of patients worldwide and is responsible for a significant rise in healthcare expenses. Imaging of β-cells in vivo is expected to contribute to an improved understanding of the underlying pathophysiology, improved diagnosis, and development of new treatment options for diabetes. Here, we describe the first radiosyntheses of [3 H]-TAK875 and [18 F]-TAK875 derivatives to be used as β-cell imaging probes addressing the free fatty acid receptor 1 (FFAR1/GPR40). The fluorine-labeled derivative showed similar agonistic activity as TAK875 in a functional assay. The radiosynthesis of the 18 F-labelled tracer 2a was achieved with 16.7 ± 5.7% radiochemical yield in a total synthesis time of 60-70 min.
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Affiliation(s)
- Romain Bertrand
- Diabetes Division, Research & Translational Medicine, Sanofi GmbH, Frankfurt am Main, Germany
- Department of Nuclear Medicine, Radboud UMC, Nijmegen, The Netherlands
| | - Isabel Hamp
- Diabetes Division, Research & Translational Medicine, Sanofi GmbH, Frankfurt am Main, Germany
| | - Mark Brönstrup
- Diabetes Division, Research & Translational Medicine, Sanofi GmbH, Frankfurt am Main, Germany
- Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Remo Weck
- DSAR/Drug Disposition, Sanofi GmbH, Frankfurt am Main, Germany
| | - Mario Lukacevic
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
| | - Andras Polyak
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
| | - Tobias L Ross
- Department of Nuclear Medicine, Hannover Medical School, Hannover, Germany
| | - Martin Gotthardt
- Department of Nuclear Medicine, Radboud UMC, Nijmegen, The Netherlands
| | - Oliver Plettenburg
- Diabetes Division, Research & Translational Medicine, Sanofi GmbH, Frankfurt am Main, Germany
- Institute of Medicinal Chemistry, Helmholtz Zentrum München, Ingolstädter Landstrasse 1, Neuherberg DE-85764, Germany
- Leibniz Universität Hannover, Schneiderberg 1b, 30167, Hannover, Germany
| | - Volker Derdau
- DSAR/Drug Disposition, Sanofi GmbH, Frankfurt am Main, Germany
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Naszályi Nagy L, Polyak A, Mihály J, Szécsényi Á, Szigyártó IC, Czégény Z, Jakab E, Németh P, Magda B, Szabó P, Veres Z, Jemnitz K, Bertóti I, Jóba RP, Trencsényi G, Balogh L, Bóta A. Silica@zirconia@poly(malic acid) nanoparticles: promising nanocarriers for theranostic applications. J Mater Chem B 2016; 4:4420-4429. [DOI: 10.1039/c6tb01102k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Nanocarriers designed, synthesized and characterized for the targeted delivery of diagnostic and therapeutic 99mTc to folate-overexpressing tumors.
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Naszályi Nagy L, Mihály J, Polyak A, Debreczeni B, Császár B, Szigyártó IC, Wacha A, Czégény Z, Jakab E, Klébert S, Drotár E, Dabasi G, Bóta A, Balogh L, Kiss É. Inherently fluorescent and porous zirconia colloids: preparation, characterization and drug adsorption studies. J Mater Chem B 2015; 3:7529-7537. [DOI: 10.1039/c5tb00832h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Adsorption of drug molecules onto the zirconia surface.
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Polyak A, Palade E, Balogh L, Postenyi Z, Haasz V, Janoki G, Janoki GA. In vitro and biodistribution examinations of Tc-99m-labelled doxorubicin-loaded nanoparticles. Nucl Med Rev Cent East Eur 2011; 14:55-62. [DOI: 10.5603/nmr.2011.00016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Balogh L, Polyak A, Mathe D, Kiraly R, Thuroczy J, Terez M, Janoki G, Ting Y, Bucci LR, Schauss AG. Absorption, uptake and tissue affinity of high-molecular-weight hyaluronan after oral administration in rats and dogs. J Agric Food Chem 2008; 56:10582-10593. [PMID: 18959406 DOI: 10.1021/jf8017029] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The purpose of this study was to determine the absorption, distribution and excretion of (99m)technetium-labeled, high-molecular-weight hyaluronan (((99m)Tc-HA) and (99m)technetium pertechnetate ((99m)Tc-P) after single dose, oral administration to Wistar rats and Beagle dogs. A pilot study utilized (99m)Tc-HA alone, and a second confirmatory study compared uptake of labeled (99m)Tc-HA with (99m)Tc-P. Urinary and fecal excretion after (99m)Tc-HA ingestion by rats showed 86.7-95.6% of radioactivity was recovered, almost all in feces. All tissues examined showed incorporation of radioactivity from (99m)Tc-HA starting at 15 min and persisting for 48 h, in a pattern significantly different from (99m)Tc-P. Whole-body scintigraphs and close-ups of the ventral chest region showed nonalimentary radioactivity from (99m)Tc-HA concentrated in joints, vertebrae and salivary glands four hours after administration. Autoradiography of skin, bone and joint tissue pieces after 24 h showed incorporation of radioactivity from (99m)Tc-HA, but not from (99m)Tc-P. Conversely, absorption, distribution and excretion of (99m)Tc was completely different from (99m)Tc-HA, showing an expected pattern of rapid absorption and excretion in urine, with accumulation in thyroid glands, stomach, kidney and bladder. This report presents the first evidence for uptake and distribution to connective tissues of orally administered, high-molecular-weight HA.
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Affiliation(s)
- Lajos Balogh
- Department of Applied Radioisotopes, National FJC Research Institute for Radiobiology and Radiohygiene, Fodor Jozsef National Center of Health, Budapest, Hungary,
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Schauss AG, Balogh L, Polyak A, Mathe D, Kiraly R, Gyozo J, Yao T, Bucci LR. Absorption, distribution, excretion and tissue uptake of 99mtechnetium labeled hyaluronan (HA) after single oral doses in rats and beagle dogs. FASEB J 2008. [DOI: 10.1096/fasebj.22.2_supplement.729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Lajos Balogh
- National FTJ Research Institute for Radiobiology and RadiohygieneBudapestHungary
| | - Andras Polyak
- National FTJ Research Institute for Radiobiology and RadiohygieneBudapestHungary
| | - Domokos Mathe
- National FTJ Research Institute for Radiobiology and RadiohygieneBudapestHungary
| | - Reka Kiraly
- National FTJ Research Institute for Radiobiology and RadiohygieneBudapestHungary
| | - Janoki Gyozo
- National FTJ Research Institute for Radiobiology and RadiohygieneBudapestHungary
| | - Tingting Yao
- Fenchem Enterprises LtdNanjingPeople's Republic of China
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Denny TN, Scolpino A, Garcia A, Polyak A, Weiss SN, Skurnick JH, Passannante MR, Colon J. Evaluation of T-lymphocyte subsets present in semen and peripheral blood of healthy donors: a report from the heterosexual transmission study. Cytometry 1995; 20:349-55. [PMID: 7587723 DOI: 10.1002/cyto.990200411] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The purpose of this study was to accurately determine the T-lymphocyte subsets found in semen from healthy volunteers, to evaluate the impact of repeated ejaculation on the frequency or type of immune cells present in semen, and to compare subset analysis in semen to that in the peripheral blood. To accomplish this, a flow cytometric method was developed to identify and count immunophenotypically distinct cells present in semen. Fresh semen samples and peripheral blood were collected over three consecutive days from nine healthy donors. Donors had normal ejaculate volume, sperm count, sperm motility, morphology, and leukocyte count. No significant intra-donor differences were seen in these parameters over time. No significant differences were observed in the percentage of CD3+ cells, CD4+ cells, CD8+ cells, and the CD4:CD8 ratio in semen on consecutive days. However, within the CD4+ subset, when naive and memory CD4+ cells were measured, some day to day variability was suggested. No significant differences in CD3+, CD4+, CD8+, CD4/CD8 ratio, or naive and memory subsets were seen in the peripheral blood between sampling days. When semen was compared to peripheral blood some differences in immune subset values were observed, with an increase in the percentage of memory CD4+ cells in semen being the most striking. This finding may be relevant to HIV transmission, since others have shown that this cell may be preferentially infected with HIV and is the primary reservoir for virus in infected individuals.
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Affiliation(s)
- T N Denny
- Departments of Pediatrics and Pathology, New Jersey Medical School, Newark, USA
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