Összesen 3 találat.


001-es BibID:BIBFORM062197
Első szerző:Koroknai Viktória (molekuláris biológus)
Cím:Genomic profiling of invasive melanoma cell lines by array comparative genomic hybridization / Viktória Koroknai, Szilvia Ecsedi, Laura Vízkeleti, Tímea Kiss, István Szász, Andrea Lukács, Orsolya Papp, Róza Ádány, Margit Balázs
Megjegyzések:Malignant melanoma is one of the most aggressive humancancers. Invasion of cells is the first step in metastasis,resulting in cell migration through tissue compartments.We aimed to evaluate genomic alterations specificallyassociated with the invasive characteristics of melanomacells. Matrigel invasion assays were used to determine theinvasive properties of cell lines that originated from primarymelanomas. Array comparative genomic hybridizationanalyses were carried out to define the chromosome copynumber alterations (CNAs). Several recurrent CNAs wereidentified by array comparative genomic hybridization thataffected melanoma-related genes. Invasive primary celllines showed high frequencies of CNAs, including the lossof 7q and gain of 12q chromosomal regions targetingPTPN12, ADAM22, FZD1, TFPI2, GNG11, COL1A2, SMURF1,VGF, RELN and GLIPR1 genes. Gain of the GDNF (5p13.1),GPAA1, PLEC and SHARPIN (8q24.3) genes wassignificantly more frequent in invasive cell lines comparedwith the noninvasive ones. Importantly, copy number gainsof these genes were also found in cell lines that originatedfrom metastases, suggesting their role in melanomametastasis formation. The present study describes genomicdifferences between invasive and noninvasive melanomacell lines that may contribute toward the aggressivephenotype of human melanoma cells.
Tárgyszavak:Orvostudományok Egészségtudományok idegen nyelvű folyóiratközlemény külföldi lapban
array comparative genomic hybridization
copy number alteration
malignant melanoma
Megjelenés:Melanoma Research. - 2 (2016), p. 100-107. -
További szerzők:Ecsedi Szilvia (1982-) (molekuláris biológus, genetikus) Vízkeleti Laura (1984-) (molekuláris biológus, genetikus) Kiss Tímea (1986-) (molekuláris biológus) Szász István (1985-) (Ph.D hallgató) Lukács Andrea (1989-) (biológus) Papp Orsolya Ádány Róza (1952-) (megelőző orvostan és népegészségtan szakorvos) Balázs Margit (1952-) (sejtbiológus, molekuláris genetikus)
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001-es BibID:BIBFORM082731
Első szerző:Szász István (Ph.D hallgató)
Cím:Molecular alterations associated with acquired resistance to BRAFV600E targeted therapy in melanoma cells / István Szász, Viktória Koroknai, Tímea Kiss, Laura Vízkeleti, Róza Ádány, Margit Balázs
Megjegyzések:Selective inhibition of the mutant BRAF protein is a highly promising therapeutic approach for melanoma patients carrying the BRAFV600E mutation. Despite the remarkable clinical response, most patients develop resistance and experience tumour regrowth. To clarify the molecular background of BRAF inhibitor resistance, we generated four drug-resistant melanoma cell lines from paired primary/metastatic cell lines using a vemurafenib analogue PLX4720. Three of the resistant cell lines showed decreased proliferation after drug withdrawal, but the proliferation of one cell line (WM278RES) increased notably. Furthermore, we observed opposite phenomena in which a ?drug holiday' could not only be beneficial but also contribute to tumour progression. Using genomic and proteomic approaches, we found significantly different alterations between the sensitive and resistant cell lines, some of which have not been reported previously. In addition to several other changes, copy number gains were observed in all resistant cell lines on 8q24.11-q24.12 and 8q21.2. Gene expression analysis showed that most genes upregulated in the resistant cell lines were associated with cell motility and angiogenesis. Increased expression of six proteins (ANGPLT4, EGFR, Endoglin, FGF2, SerpinE1 and VCAM-1) and decreased expression of two proteins (osteopontin and survivin) were observed consistently in all resistant cell lines. In summary, we identified new genomic alterations and characterized the protein expression patterns associated with the resistant phenotype. Although several proteins have been shown to be associated with BRAF resistance, our study is the first to describe the association of VCAM-1 and osteopontin with BRAF resistance.
Tárgyszavak:Orvostudományok Egészségtudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Melanoma Research. - 29 : 4 (2019), p. 390-400. -
További szerzők:Koroknai Viktória (1986-) (molekuláris biológus) Kiss Tímea (1986-) (molekuláris biológus) Vízkeleti Laura (1984-) (molekuláris biológus, genetikus) Ádány Róza (1952-) (megelőző orvostan és népegészségtan szakorvos) Balázs Margit (1952-) (sejtbiológus, molekuláris genetikus)
Pályázati támogatás:OTKA K_112327
TÁMOP 4.2.2.A-11/1/KONV-2012-0031
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001-es BibID:BIBFORM066849
Első szerző:Vízkeleti Laura (molekuláris biológus, genetikus)
Cím:Altered integrin expression patterns revealed by microarray in human cutaneous melanoma / Laura Vizkeleti, Timea Kiss, Viktoria Koroknai, Szilvia Ecsedi, Orsolya Papp, Istvan Szasz, Roza Adany, Margit Balazs
Megjegyzések:A large variety of molecular pathways in melanoma progression suggests that no individual molecularalteration is crucial itself. Our aim was to define the molecular alterations underlying metastasisformation. Gene expression profiling was performed using microarray and qRT-PCR to definealterations between matched primary and metastatic melanoma cell lines. These data were integratedwith publicly available unmatched tissue data. The invasiveness of cell lines was determined by Matrigelinvasion assays, and invasive clones from primary melanoma derived cell lines were also selected. Twometastatic cell line models were created: the regional lymph node WM983A-WM983AINV-WM983Band the distant lung WM793B-WM793BINV-1205Lu metastatic models. The majority of metastasisgenes were downregulated and enriched in adhesion and ITGA6-B4 pathways. Upregulation of immunepathways was characteristic of distant metastases, whereas increased Rap1 signalling was specific forregional (sub)cutaneous metastases. qRT-PCR analysis of selected integrins (A2, A3, A4, A9, B5, B8,A6, B1 and B3) highlighted the possible importance of ITGA3/4 and B8 in metastatic process,distinguishing regional and distant metastases. We identified functionally relevant gene clusters thatinfluenced metastasis formation. Our data provide further evidence that integrin expression patterns maybe important in distant metastasis formation.
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
melanoma metastasis
gene expression microarray
cell line invasivity
Megjelenés:Melanoma Research. - 27 : 3 (2017), p. 180-188. -
További szerzők:Kiss Tímea (1986-) (molekuláris biológus) Koroknai Viktória (1986-) (molekuláris biológus) Ecsedi Szilvia (1982-) (molekuláris biológus, genetikus) Papp Orsolya Szász István (1985-) (Ph.D hallgató) Ádány Róza (1952-) (megelőző orvostan és népegészségtan szakorvos) Balázs Margit (1952-) (sejtbiológus, molekuláris genetikus)
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