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001-es BibID:	BIBFORM117056
Első szerző:	Képes Zita (orvos)
Cím:	In Vivo Evaluation of Brain [18F]F-FDG Uptake Pattern Under Different Anaesthesia Protocols / Zita Kepes, Viktória Arato, Csaba Csikos, Eva Hegedus, Regina Esze, Tamas Nagy, Istvan Joszai, Miklos Emri, Istvan Kertesz, Gyorgy Trencsenyi
Dátum:	2024
ISSN:	0258-851X
Megjegyzések:	Background/Aim: Since the use of anaesthetics has the drawback of altering radiotracer distribution, preclinical positron emission tomography (PET) imaging findings of anaesthetised animals must be carefully handled. This study aimed at assessing the cerebral [18F]F-FDG uptake pattern in healthy Wistar rats under four different anaesthesia protocols using microPET/magnetic resonance imaging (MRI) examinations. Materials and Methods: Post-injection of 15?1.2 MBq of [18F]F-FDG, either while awake or during the isoflurane-induced incubation phase was applied. Prior to microPET/MRI imaging, one group of the rats was subjected to forane-only anaesthesia while the other group was anaesthetised with the co-administration of forane and dexmedetomidine/Dexdor?. Results: While as for the whole brain it was the addition of dexmedetomidine/Dexdor? to the anaesthesia protocol that generated the differences between the radiotracer concentrations of the investigated groups, regarding the cortex, the [18F]F-FDG accumulation was rather affected by the way of incubation. To ensure the most consistent and highest uptake, forane-induced anaesthesia coupled with an awake uptake condition seemed to be most suitable method of anaesthetisation for cerebral metabolic assessment. Diminished whole brain and cortical tracer accumulation detected upon dexmedetomidine/Dexdor? administration highlights the significance of the mechanism of action of different anaesthetics on radiotracer pharmacokinetics. Conclusion: Overall, the standardization of PET protocols is of utmost importance to avoid the confounding factors derived from anaesthesia.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Anaesthesia brain dexmedetomidine 2-deoxy-2-[18F]fluoro-D-glucose: [18F]F-FDG isoflurane micro positron emission tomography/magnetic resonance imaging (microPET/MRI)
Megjelenés:	In Vivo. - 38 : 2 (2024), p. 587-597. -
További szerzők:	Arató Viktória Zsófia (1989-) (gyógyszerész) Csíkos Csaba Hegedűs Éva (1978-) (biofizikus) Esze Regina Nagy Tamás (1977-) (vegyész, orvosi laboratóriumi analitikus) Jószai István (1978-) (vegyész) Emri Miklós (1962-) (fizikus) Kertész István (1966-) (vegyész) Trencsényi György (1978-) (biológus, biokémikus, molekuláris biológus)
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM083977
Első szerző:	Kis Adrienn (molekuláris biológus)
Cím:	In vivo investigation of bestatin treatment in tumor bearing animal models using 68Ga labeled NGR peptide / A. Kis, J. P. Szabo, T. Nagy, N. Denes, I. Kertesz, V. Z. Arato, E. Berenyi, G. Trencsenyi
Dátum:	2020
Megjegyzések:	INTRODUCTION: Several malignant tumors, such as melanomas and fibrosarcomas are positive for Aminopeptidase N (APN/CD13) receptor, which play an important role in neo-angiogenic process and metastatic tumor cell invasion. Our previous studies have already shown that 68Ga-labeled NGR peptides bind specifically to APN/CD13 expressing tumor cells. 68Ga labeled NGR peptides enable the investigation of the neo-angiogenic process with Positron Emission Tomography (PET). APN/CD13 inhibitors are potential chemotherapeutic agents in APN/CD13 positive tumors. The aim of this study was to investigate the effect of Bestatin in subcutan HT1080 and B16F10 tumor bearing animal models using 68Ga-NODAGA-cNGR. MATERIAL AND METHOD: On day 0. CB17 SCID mice (n=10) were inoculated subcutaneously with 1,5x106/150 ?l HT1080 (human fibrosarcoma) cells and C57BL/6 mice (n=6) were injected subcutaneosly with 3x106/100 ?l B16F10 (mouse melanoma) cells. 3 days after inoculation the animals were randomly distributed into control and Bestatin [15 mg/kg] treated groups. The daily intraperitoneal Bestatin treatments were administered for 7 days.18FDG or 68Ga-NODAGA-cNGR PET scans were taken on the 5th, 6th and 10th day to monitor tumor growth. On the 10th day 90 min after intravenous injection of 10?0,3 MBq 68Ga-NODAGA-cNGR PET/MRI scans and ex vivo biodistribution studies were made. Data were statistically analysed using unpaired Student's test. RESULTS AND DISCUSSION: On the 10th day PET scans were taken using 68Ga-NODAGA-cNGR. In the case of subcutan HT1080 tumor bearing animals significant (p?0,05) differences were observed in SUVmean values between Bestatin treated (SUVmean=0,01?0,009) and control (SUVmean=0,114?0,045) groups. Furthermore, significant (p?0,05) heterogeneities were noticed among SUVmean values in subcutaneously transplanted B16F10 tumor bearing animals, where SUVmean values were 0,04?0,004 in Bestatin treated groups and 0,105?0,006 in control groups. In subcutan tumors tumor/muscle (T/M) ratios - which were received from ex vivo biodistribution studies - are well correlated with in vivo T/M SUVmean ratios. CONCLUSION: In relation to subcutan HT1080 and B16F10 tumor bearing animals' Bestatin treatment reduced the 68Ga-NODAGA-cNGR uptake in tumor in proportion to control group. 68Ga-NODAGA-cNGR is an applicable radiotracer for treatment follow up. The published work was supported by EFOP-3.6.3-VEKOP-16-2017-00009 co-financed by EU and the European Social Found.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok előadáskivonat könyvrészlet
Megjelenés:	EACR-AACR-ASPIC Conference 2020. - p. P-061
További szerzők:	Péli-Szabó Judit (1977-) (vegyész) Nagy Tamás (1977-) (vegyész, orvosi laboratóriumi analitikus) Dénes Noémi (1992-) (vegyész) Kertész István (1966-) (vegyész) Arató Viktória Zsófia (1989-) (gyógyszerész) Berényi Ervin (1964-) (radiológus) Trencsényi György (1978-) (biológus, biokémikus, molekuláris biológus)
Pályázati támogatás:	EFOP-3.6.3-VEKOP-16-2017-00009 EFOP
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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