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001-es BibID:BIBFORM005084
Első szerző:Kemény-Beke Ádám (szemész)
Cím:Apoptotic response of uveal melanoma cells upon treatment with chelidonine, sanguinarine and chelerythrine / Ádám Kemény-Beke, János Aradi, Judit Damjanovich, Zoltán Beck, Andrea Facskó, András Berta, Andrea Bodnár
Dátum:2006
ISSN:304-3835 (Print)
Megjegyzések:The benzophenanthridine alkaloids sanguinarine, chelerythrine and chelidonine were reported previously to provoke cell death in a variety of tumor cells suggesting their potential application as anticancer agents. Here we tested their effects on a primary human uveal melanoma cell line, OCM-1. Flow cytometric analysis of annexin V binding/PI exclusion and DNA fragmentation disclosed that all these alkaloids could induce apoptosis in OCM-1 cells. Moreover, necrotic cell death was also observed upon alkaloid treatment. As it was also evidenced by light microscopic inspection of cellular morphology, chelidonine primarily caused apoptosis, while sanguinarine and chelerythrine were effective via a so-termed bimodal cell death (apoptosis and primary necrosis). The relative efficiencies of the two modes depended on the applied dose. This study is the first implication for the possible use of these alkaloids in the therapy of uveal melanomas, for which no really efficient therapeutic regimen is available so far.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Alkaloids
analysis
Annexin A5
Annexin V
Antineoplastic Agents
Apoptosis
Benzophenanthridines
Berberine Alkaloids
Cell Line
Cell Line,Tumor
Cell Shape
Cell Survival
Cells
Comparative Study
Dna
DNA Fragmentation
Dose-Response Relationship,Drug
drug effects
Human
Humans
Hungary
Isoquinolines
Light
Melanoma
Microscopy,Confocal
Necrosis
pathology
pharmacology
Phenanthridines
Research
Support
therapy
Uveal Neoplasms
Megjelenés:Cancer Letters. - 237 : 1 (2006), p. 67-75. -
További szerzők:Aradi János (1942-) (biokémikus, vegyész) Damjanovich Judit (1963-) (szemész) Beck Zoltán (1970-) (molekuláris biológus, mikrobiológus) Facskó Andrea (1953-) (szemész) Berta András (1955-) (szemész, gyermekszemész) Dóczy-Bodnár Andrea (1970-) (biofizikus)
Pályázati támogatás:F046497
OTKA
T038163
OTKA
T038348
OTKA
Internet cím:elektronikus változat
DOI
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2.

001-es BibID:bibEBI00019288
Első szerző:Kemény-Beke Ádám (szemész)
Cím:Antiproliferative effect of 4-thiouridylate on OCM-1 uveal melanoma cells / Kemény-Beke A., Berényi E., Facskó A., Damjanovich J., Horváth A., Bodnár A., Berta A., Aradi J.
Dátum:2006
Megjegyzések:Brachytherapy is a well-established, effective treatment for uveal melanoma with a failure rate of 15%. The fatal consequence of unsuccessful treatments offers reason for improvement of the method. The authors propose using an apoptosis inducing agent locally, concomitantly with the well-established therapy, to sensitize the tumor cells. The authors propose a new nontoxic moderately active apoptosis inducing agent, 4-thio-uridylate (s4UMP), for this purpose. METHODS: OCM-1 uveal melanoma cells were treated with various concentrations of s4UMP and its effect was monitored by measuring the cell viability (MTT assay). The following apoptosis detecting methods were performed to reveal the mechanism of decreased cell viability: light microscopy, DNA fragmentation assay, determination of caspase 9 activity, and FACS analysis. RESULTS: The viability of uveal melanoma cells was decreased by 32%, 40%, and 9% after 24, 48, and 72 hours of treatment with 10 microg/mL (30 microM) s4UMP. The effect was not dose dependent; it rather followed a saturation-type inhibition and the cells at lower drug concentration recovered after 72 hours. Characteristic apoptotic cell morphology and DNA fragmentation was detected in treated cells. The caspase-9 was activated upon treatment showing maximal activity at 48 hours suggesting the induction of apoptosis. The annexin binding activity further verified the apoptogenic activity of s4UMP. CONCLUSIONS: Uveal melanoma, more than other solid tumors, is resistant to most of the chemotherapeutic protocols as indicated by the high mortality rate of metastatic disease. The authors showed that s4UMP, a naturally occurring nucleotide, could induce apoptosis in uveal melanoma cells, suggesting a potential supplementary therapeutic application of the compound.
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:European Journal of Ophthalmology. - 16 : 5 (2006), p. 680-685. -
További szerzők:Berényi Erika Facskó Andrea (1953-) (szemész) Damjanovich Judit (1963-) (szemész) Horváth A. Dóczy-Bodnár Andrea (1970-) (biofizikus) Berta András (1955-) (szemész, gyermekszemész) Aradi János (1942-) (biokémikus, vegyész)
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