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001-es BibID:	BIBFORM040770
035-os BibID:	PMID:23246780 (scopus)84872778514 (wos)000314054200027
Első szerző:	Hajdu István (vegyész)
Cím:	Cancer cell targeting and imaging with biopolymer-based nanodevices / István Hajdu, Magdolna Bodnár, György Trencsényi, Teréz Márián, György Vámosi, József Kollár, János Borbély
Dátum:	2013
ISSN:	0378-5173
Megjegyzések:	We report here the synthesis, in vitro and in vivo investigation of magnetic resonance imaging (MRI) active nanoparticles, which target folate receptor overexpressing tumor cells. Self-assembled nanoparticles with a hydrodynamic size of 50-200nm were prepared from poly-γ-glutamic acid and chitosan biopolymers with Gd-ions. The nanoparticles are biocompatible, non-toxic and stable for several months in aqueous media. In vitro assays using confocal microscopy, flow cytometry and MR imaging on HeLa human cervix carcinoma tumor cells showed that folic acid targeted nanoparticles were internalized specifically in a folate receptor dependent manner. In vivo study confirmed, that, considerable accumulation of nanosystems was found compared with the control animal represented by the MR images. Relaxometry measurements demonstrated that the nanoparticle-Gd complexes drastically change the signal intensity of the tumor cells. Because of the contrast enhancement, they are attractive candidates as potential contrast agents for a variety of diagnostic applications including early diagnosis of tumors.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk egyetemen (Magyarországon) készült közlemény Animal article Carcinoma cell biology Cells Confocal Confocal microscopy cytometry diagnosis FLOW Flow Cytometry Human Hungary In Vitro Magnetic Resonance Imaging Microscopy Nanotechnology TUMORS
Megjelenés:	International Journal of Pharmaceutics. - 441 : 1-2 (2013), p. 234-241. -
További szerzők:	Bodnár Magdolna Trencsényi György (1978-) (biológus, biokémikus, molekuláris biológus) Márián Teréz (1950-) (radiobiológus) Vámosi György (1967-) (biofizikus) Kollár József (1950-) (radiológus) Borbély János (1950-) (vegyész)
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001-es BibID:	bibEBI00026275
035-os BibID:	(scopus)85091219251 (wos)000580654300072
Első szerző:	Kis Adrienn (molekuláris biológus)
Cím:	In vivo assessment of aminopeptidase N (APN/CD13) specificity of different 68 Ga-labelled NGR derivatives using PET/MRI imaging / Adrienn Kis, Noémi Dénes, Judit P. Szabó, Viktória Arató, István Jószai, Kata Nóra Enyedi, Szilvia Lakatos, Ildikó Garai, Gábor Mező, István Kertész, György Trencsényi
Dátum:	2020
ISSN:	0378-5173
Megjegyzések:	Aminopeptidase N (APN/CD13) plays an important role in neoangiogenic process in malignancies. Our previous studies have already shown that 68Ga-labelled NOTA conjugated asparagine-glycine-arginine peptide (c [KNGRE]-NH2) specifically bind to APN/CD13 expressing tumors. The aim of this study was to evaluate and compare the APN/CD13 specificity of newly synthesized 68Ga-labelled NGR derivatives in vivo by PET/MRI imaging using hepatocellular carcinoma (He/De) and mesoblastic nephroma (Ne/De) tumor models. PET/MRI and ex vivo biodistribution studies were performed 11 ? 1 days after subcutaneous injection of tumor cells and 90 min after intravenous injection of 68Ga-NOTA-c(NGR), 68Ga-NODAGA-c(NGR), 68Ga-NODAGA-c(NGR) (MG1) or 68Ga-NODAGA-c(NGR) (MG2). The APN/CD13 selectivity was confirmed by blocking experiments and the APN/CD13 expression was verified by immunohistochemistry. 68Ga-labelled c(NGR) derivatives were produced with high specific activity and radiochemical purity. In control animals, low radiotracer accumulation was found in abdominal and thoracic organs. Using tumor-bearing animals we found that the 68Ga-NOTA-c(NGR), 68Ga- NODAGA-c(NGR), and 68Ga-NODAGA-c(NGR) (MG1) derivatives showed higher uptake in He/De and Ne/De tumors, than that of the accumulation of 68Ga-NODAGA-c(NGR) (MG2). APN/CD13 is a very promising target in PET imaging, however, the selection of the appropriate 68Ga-labelled NGR-based radiopharmaceutical is critical for the precise detection of tumor neo-angiogenesis and for monitoring the efficacy of anticancer therapy.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	International Journal Of Pharmaceutics. - 589 (2020), p. 1-11. -
További szerzők:	Dénes Noémi (1992-) (vegyész) Péli-Szabó Judit (1977-) (vegyész) Arató Viktória Zsófia (1989-) (gyógyszerész) Jószai István (1978-) (vegyész) Enyedi Kata Nóra (1987-) (vegyész) Rácz Szilvia (1989-) (molekulársi biológus) Garai Ildikó (1966-) (radiológus) Mező Gábor (1959-) (vegyész) Kertész István (1966-) (vegyész) Trencsényi György (1978-) (biológus, biokémikus, molekuláris biológus)
Pályázati támogatás:	EFOP-3.6.3-VEKOP-16-2017-00009 EFOP Tématerületi Kiválósági Program ED_18-1-2019-0028 Egyéb NKFIH K119552 Egyéb NVKP_16-1-2016-0036 Egyéb
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001-es BibID:	BIBFORM049419
035-os BibID:	PMID:23562750 (scopus)84877013897 (wos)000319052800002
Első szerző:	Polyák András
Cím:	(99m)Tc-labelled nanosystem as tumour imaging agent for SPECT and SPECT/CT modalities / András Polyák, István Hajdu, Magdolna Bodnár, György Trencsényi, Zita Pöstényi, Veronika Haász, Gergely Jánoki, Győző A. Jánoki, Lajos Balogh, János Borbély
Dátum:	2013
Megjegyzések:	We report the synthesis, in vitro and in vivo investigation of folate-targeted, biocompatible, biodegradable self-assembled nanoparticles radiolabelled with (99m)Tc, as potential new SPECT or SPECT/CT imaging agent. Nanoparticles with hydrodynamic size in the range of 75-200 nm were prepared by self-assembly of chitosan and folated poly-γ-glutamic acid, and then radiolabelled with (99m)Tc. The nanoparticles target tumour cells overexpressing folate receptors and internalize specifically into them to realize early tumour diagnosis detected by SPECT and SPECT/CT modalities. Rat hepatocellular carcinoma cells were used as model system. Cell specificity and tumour targeting efficacy of these nanosystems were investigated in vitro, and in vivo using SPECT and fusion nanoSPECT/CT imaging. In vitro results showed that the radiolabeled nanosystem was efficiently internalized by tumour cells. Whole-body biodistribution of the new radiolabelled, folate-targeted nanoparticles revealed higher uptake in the tumorous kidney compared to the non-tumorous contralateral side. Uptake by the lungs and thyroids was negligible, which confirmed the stability of the nanoparticles in vivo. In vivo SPECT and SPECT/CT imaging visually reinforced the uptake results and were in accordance with the biodistribution data: the new nanoparticles as a targeted contrast agent improve tumour targeting and are able to detect folate-receptor-overexpressing tumours in animal models with enhanced contrast.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	International Journal of Pharmaceutics. - 449 : 1-2 (2013), p. 10-17. -
További szerzők:	Hajdu István (1981-) (vegyész) Bodnár Magdolna Trencsényi György (1978-) (biológus, biokémikus, molekuláris biológus) Pöstényi Zita Haász Veronika Jánoki Gergely Jánoki Győző Balogh Lajos Borbély János (1950-) (vegyész)
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