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001-es BibID:BIBFORM072879
Első szerző:Hancz Dóra
Cím:Flagellin increases death receptor-mediated cell death in a RIP1-dependent manner / Hancz Dora, Szabo Aniko, Molnar Tamás, Varga Zsofia, Hancz Aniko, Gregus Andrea, Hueber Anne-Odile, Rajnavolgyi Eva, Koncz Gabor
Dátum:2018
ISSN:0165-2478
Megjegyzések:Efficient adjuvants have the potential to trigger both innate and adaptive immune responses simultaneously. Flagellin is a unique pathogen-derived protein, which is recognized by pattern recognition receptors (PRRs) as well as by B-cell and T cell receptors thus providing an important link between innate and adaptive immunity. The aforementioned properties define flagellin as an optimal adjuvant. The induction of immunogenic cell death could be an additional expectation for adjuvants in the context of cancer immunotherapy due to their ability to activate dendritic cells (DC) to present tumor antigens through the engulfment of dying cells. The immunostimulatory potential of flagellin in the course of DC and lymphocyte activation is well documented, however the exact mechanism is not fully explored. Based on this limitation we sought to investigate the potential modulatory effects of flagellin on various cell death processes knowing that it plays detrimental roles in regulating the final outcome of various types of immune responses. Here we provide evidence that the pre-treatment of Jurkat T-cells with recombinant flagellin is able to increase the degree of cell death provoked by FasL or TNF-?, and concomitantly increases the cytotoxic potential of phytohemagglutinin activated T-lymphocytes in a TLR5 dependent way. In contrast to these flagellin-mediated effects on the death receptor-induced signaling events, the mitochondrial apoptotic pathway remained unaffected. Furthermore, the cell culture supernatant of wild type Salmonella enteritidis bacteria, but not their flagellin deficient variant, was able to enhance the Fas-induced cell death process. To define the molecular mechanisms of flagellin-mediated elevated levels of cell death we were able to detect the upregulation of RIP1-dependent signaling events. These findings demonstrate that the cooperative actions of pattern recognition and different death receptors are able to initiate the cell death process with the mobilization of RIP-dependent cell death modalities. This finding highlights the capability of flagellin to act as a potential adjuvant which is relevant for tumor immunotherapy.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Adjuvant
Apoptosis
Necroptosis
PAMP
T cell
TLR
Megjelenés:Immunology Letters. - 193 (2018), p. 42-50. -
További szerzők:Szabó Anikó Molnár Tamás (1989-) (molekuláris biológus) Varga Zsófia (1992-) (molekuláris biológus) Hancz Anikó Gregus Andrea (1980-) (biológus) Hueber, Anne-Odile Rajnavölgyi Éva (1950-) (immunológus) Koncz Gábor (1970-) (biológus, immunológus)
Pályázati támogatás:OTKA-114423
OTKA
GINOP-2.3.2-15-2016-00050
GINOP
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2.

001-es BibID:BIBFORM094223
Első szerző:Molnár Tamás (molekuláris biológus)
Cím:Caspase-9 acts as a regulator of necroptotic cell death / Molnár Tamás, Pallagi Petra, Tél Bálint, Király Róbert, Csoma Eszter, Jenei Viktória, Varga Zsófia, Gogolák Péter, Odile Hueber Anne, Máté Zoltán, Erdélyi Ferenc, Szabó Gábor, Pettkó-Szandtner Aladár, Bácsi Attila, Virág László, Maléth József, Koncz Gábor
Dátum:2021
ISSN:1742-464X
Megjegyzések:Necroptosis is a regulated necrotic-like cell death modality which has come into the focus of attention since it is known to contribute to the pathogenesis of many inflammatory and degenerative diseases as well as to tumor regulation. Based on current data, necroptosis serves as a backup mechanism when death receptor-induced apoptosis is inhibited or absent. However, the necroptotic role of the proteins involved in mitochondrial apoptosis has not been investigated. Here, we demonstrated that the stimulation of several death and pattern recognition receptors induced necroptosis under caspase-compromised conditions in wild-type, but not in caspase- 9-negative human Jurkat and murine MEF cells. Cerulein-induced pancreatitis was significantly reduced in mice with acinar cell-restricted caspase-9 gene knockout. The absence of caspase-9 led to impaired association of receptor-interacting serine/threonine-protein kinase 1 (RIPK1) and RIPK3 and resulted in decreased phosphorylation of RIP kinases, but the overexpression of RIPK1 or RIPK3 rescued the effect of caspase-9 deficiency. Inhibition of either Aurora kinase A (AURKA) or its known substrate, glycogen synthase kinase 3b (GSK3?) restored necroptosis sensitivity of caspase-9-deficient cells, indicating an interplay between caspase-9 and AURKA-mediated pathways to regulate necroptosis. Our findings suggest that caspase-9 acts as a newly identified regulator of necroptosis, and thus, caspase-9 provides a promising therapeutic target to manipulate the immunological outcome of cell death.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Caspase-9
cell death
inflammation
necroptosis
pancreatitis
Megjelenés:Febs Journal. - 288 : 22 (2021), p. 6476-6491. -
További szerzők:Pallagi Petra Tél Bálint Király Róbert (1975-) (biológus) Csoma Eszter (1978-) (molekuláris biológus, mikrobiológus) Jenei Viktória (1997-) (biológus) Varga Zsófia (1992-) (molekuláris biológus) Gogolák Péter (1968-) (biológus, immunológus) Odile Hueber, Anne Máté Zoltán Erdélyi Ferenc Szabó Gábor (budapesti orvos) Pettkó-Szandtner Aladár Bácsi Attila (1967-) (immunológus) Virág László (1965-) (biokémikus, sejtbiológus, farmakológus) Maléth József Koncz Gábor (1970-) (biológus, immunológus)
Pályázati támogatás:GINOP-2.3.2-15-2016-00050
GINOP
NKFIH 125224
Egyéb
UNKP- 20-4
Egyéb
EFOP-3.6.3-VEKOP-16-2017-00009
EFOP
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Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:BIBFORM089946
035-os BibID:(cikkazonosító)152032 (WoS)000614083100008 (Scopus)85097646971
Első szerző:Varga Zsófia (molekuláris biológus)
Cím:Cytotoxic activity of human dendritic cells induces RIPK1-dependent cell death / Zsófia Varga, Evelin Rácz, Anett Mázló, Mónika Korodi, Anikó Szabó, Tamás Molnár, Árpád Szöőr, Zoltán Veréb, Attila Bácsi, Gábor Koncz
Dátum:2021
ISSN:0171-2985
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Immunobiology. - 226 : 1 (2021), p. 1-7. -
További szerzők:Rácz Evelin Türk-Mázló Anett (1989-) (molekuláris biológus) Korodi Mónika Szabó Anikó Molnár Tamás (1989-) (molekuláris biológus) Szöőr Árpád (1984-) (orvos) Veréb Zoltán (1980-) (immunológus, mikrobiológus, molekuláris biológus) Bácsi Attila (1967-) (immunológus) Koncz Gábor (1970-) (biológus, immunológus)
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Intézményi repozitóriumban (DEA) tárolt változat
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4.

001-es BibID:BIBFORM086503
035-os BibID:(WoS)000559845300001 (Scopus)85085550676
Első szerző:Varga Zsófia (molekuláris biológus)
Cím:Differences in the sensitivity of classically and alternatively activated macrophages to TAK1 inhibitor-induced necroptosis / Zsófia Varga, Tamás Molnár, Anett Mázló, Ramóna Kovács, Viktória Jenei, Krisztina Kerekes, Attila Bácsi, Gábor Koncz
Dátum:2020
ISSN:0340-7004
Megjegyzések:Controlling the balance of pro-inflammatory M1 versus anti-inflammatory M2 macrophages may have paramount therapeutic benefit in cardiovascular diseases, infections, cancer and chronic inflammation. The targeted depletion of different macrophage populations provides a therapeutic option to regulate macrophage-mediated functions. Macrophages are highly sensitive to necroptosis, a newly described regulated cell death mediated by receptor-interacting serine/threonine-protein kinase 1 (RIPK1), RIPK3 and mixed lineage kinase domain like pseudokinase. Antagonists of inhibitors of apoptosis proteins (SMAC mimetics) block RIPK1 ubiquitination, while TGF-activated kinase 1 (TAK1) inhibitors prevent the phosphorylation of RIPK1, resulting in increased necroptosis. We compared the sensitivity of monocyte-derived human M1 and M2 cells to various apoptotic and necroptotic signals. The two cell types were equally sensitive to all investigated stimuli, but TAK1 inhibitor induced more intense necroptosis in M2 cells. Consequently, the treatment of co-cultured M1 and M2 cells with TAK1 inhibitor shifted the balance of the two populations toward M1 dominance. Blockage of either Aurora Kinase A or glycogen synthase kinase 3 beta, two newly described necroptosis inhibitors, increased the sensitivity of M1 cells to TAK1-inhibitor-induced cell death. Finally, we demonstrated that in vitro differentiated tumor-associated macrophages (TAM-like cells) were as highly sensitive to TAK1 inhibitor-induced necroptosis as M2 cells. Our results indicate that at least two different necroptotic pathways operate in macrophages and the targeted elimination of different macrophage populations by TAK1 inhibitor or SMAC mimetic may provide a therapeutic option to regulate the balance of inflammatory/anti-inflammatory macrophage functions.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Necroptosis
Macrophage
Infammation
Cancer
Megjelenés:Cancer Immunology Immunotherapy. - 8 (2020), p. 1-15. -
További szerzők:Molnár Tamás (1989-) (molekuláris biológus) Türk-Mázló Anett (1989-) (molekuláris biológus) Kovács Ramóna (1991-) (biológus, okleveles klinikai laboratóriumi kutató) Jenei Viktória (1997-) (biológus) Kerekes Krisztina Bácsi Attila (1967-) (immunológus) Koncz Gábor (1970-) (biológus, immunológus)
Pályázati támogatás:GINOP-2.3.2-15-2016-00005
GINOP
NKFIH 125224
Egyéb
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Intézményi repozitóriumban (DEA) tárolt változat
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