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001-es BibID:	BIBFORM004868
035-os BibID:	(scopus)20144375715 (wos)000228111600008
Első szerző:	Horváth András (vegyész)
Cím:	Potent inhibition of HIV-1 entry by (s4dU)35 / Horvath, A., Tokes, S., Hartman, T., Watson, K., Turpin, J. A., Buckheit, R. W., Jr., Sebestyen, Z., Szollosi, J., Benko, I., Bardos, T. J., Dunn, J. A., Fesus, L., D. Toth, F., Aradi, J.
Dátum:	2005
ISSN:	0042-6822
Megjegyzések:	We have previously reported the potent in vitro HIV-1 anti-reverse transcriptase activity of a 35-mer of 4-thio-deoxyuridylate [(s(4)dU)(35)]. In efforts to define its activity in a more physiological system, studies were carried out to determine the stage of viral infection that this compound mediates its anti-viral effect. Results of the studies reported herein show that (s(4)dU)(35) is nontoxic and is capable of inhibiting both single and multi-drug resistant HIV strains (IC(50): 0.8-25.4 microg/ml) in vitro. Besides its previously reported anti-RT activity, (s(4)dU)(35) mediated its antiviral action by preventing virus attachment (IC(50): 0.002-0.003 microg/ml), and was stable in vitro and slowly degraded by DNAses. Competition studies and fluorescence resonance energy transfer (FRET) experiments indicated that (s(4)dU)(35) preferentially binds to CD4 receptors, but not to CD48. Confocal laser scanning microscopy (CLSM) studies showed that (s(4)dU)(35) did not penetrate into the cells and colocalized with cell surface thioredoxin. Our studies identify (s(4)dU)(35) as a potential novel HIV entry inhibitor that may have utility as either a systemic antiretroviral or as a preventing agent for HIV transmission.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk antagonists and inhibitors Anti-HIV Agents Antigens,CD4 Cell Line Cells chemical synthesis Deoxyuracil Nucleotides drug effects Energy Transfer Fluorescence Fluorescence Resonance Energy Transfer genetics Hela Cells Hiv-1 HIV-1 Reverse Transcriptase Humans Hungary In Vitro metabolism methods Microbial Sensitivity Tests Microscopy Microscopy,Confocal pathogenicity pharmacology Research Reverse Transcriptase Inhibitors Support Thionucleotides toxicity
Megjelenés:	Virology. - 334 : 2 (2005), p. 214-223. -
További szerzők:	Tőkés Szilvia (1964-) (biológus) Hartman, Tracy Watson, Karen Turpin, Jim A. Buckheit, Robert W. Jr. Sebestyén Zsolt Szöllősi János (1953-) (biofizikus) Benkő Ilona (1954-) (orvos, farmakológus) Bardos, Thomas J. Dunn, Joseph A. Fésüs László (1947-) (orvos biokémikus) Tóth Ferenc, D. (1940-2004) (mikrobiológus, élettanász) Aradi János (1942-) (biokémikus, vegyész)
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001-es BibID:	BIBFORM040284
Első szerző:	Szegedi István (hematológus, onkológus, nefrológus)
Cím:	Differential regulation of umbilical cord blood and leukemic B cells by interferon-alpha (IFN-[alfa]) : observations in cultured cells / Szegedi I., Kiss C., Karászi E., Vámosi G., Szöllősi J., Kovács P., Benkő I.
Dátum:	2006
ISSN:	1219-4956
Megjegyzések:	The exact mechanism of the beneficial therapeutic action of interferon-a (IFN-alpha) in B-cell-lineage malignancies has not been adequately explained. Here we report on the differential effect of IFN-alpha2b on non-malignant B cells of umbilical cord blood and leukemic B-cell lines JY, BL-41 and BCBL-1. Leukemic cell proliferation was characterized by colony assay, whereas apoptosis was investigated by flow cytometry of propidium iodide-stained cells. The degree of differentiation was evaluated by measuring the expression level of Fcgamma receptor-II (FcgammaRII) labeled with anti-CD32-FITC monoclonal antibody using flow cytometry. IFN-alpha protected umbilical cord blood CD19-positive B lymphocytes from apoptotic cell death in vitro. IFN-alpha significantly decreased colony formation of all three cell lines, and in contrast to normal cells, induced apoptosis in JY and BL-41 and excessive necrosis in HHV-8 infected BCBL-1 cells. FcgammaRII was upregulated both in normal and in leukemic B cells as indicated by an increase both in the proportion of CD32-positive cells and the mean fluorescence intensity. From our results it seems that antiproliferative, apoptotic and differentiative effects of IFN-alpha are interrelated but distinct cellular events, which are differentially regulated in normal, leukemic and virus-infected cells of the B-cell lineage.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Pathology & Oncology Research. - 12 : 3 (2006), p. 159-163. -
További szerzők:	Kiss Csongor (1956-) (hematológus, onkológus) Karászi Éva Vámosi György (1967-) (biofizikus) Szöllősi János (1953-) (biofizikus) Kovács Péter (1939-) (farmakológus) Benkő Ilona (1954-) (orvos, farmakológus)
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