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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)
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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