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001-es BibID:	BIBFORM104605
035-os BibID:	(WoS)000924581500008 (Scopus)85141332501
Első szerző:	Czimmerer Zsolt (molekuláris biológus)
Cím:	The epigenetic state of IL-4-polarized macrophages enables inflammatory cistromic expansion and extended synergistic response to TLR ligands / Czimmerer Zsolt, Halasz Laszlo, Daniel Bence, Varga Zsofia, Bene Krisztian, Domokos Apolka, Hoeksema Marten, Shen Zeyang, Berger Wilhelm K., Cseh Timea, Jambrovics Karoly, Kolostyak Zsuzsanna, Fenyvesi Ferenc, Varadi Judit, Poliska Szilard, Hajas Gyorgy, Szatmari Istvan, Glass Christopher K., Bacsi Attila, Nagy Laszlo
Dátum:	2022
ISSN:	1074-7613
Megjegyzések:	Prior exposure to microenvironmental signals could fundamentally change the response of macrophages to subsequent stimuli. It is believed that T helper-2 (Th2)-cell-type cytokine interleukin-4 (IL-4) and Toll-like receptor (TLR) ligand-activated transcriptional programs mutually antagonize each other, and no remarkable convergence has been identified between them. In contrast, here, we show that IL-4-polarized macrophages established a hyperinflammatory gene expression program upon lipopolysaccharide (LPS) exposure. This phenomenon, which we termed extended synergy, was supported by IL-4-directed epigenomic remodeling, LPS-activated NF-?B-p65 cistrome expansion, and increased enhancer activity. The EGR2 transcription factor contributed to the extended synergy in a macrophage-subtype-specific manner. Consequently, the previously alternatively polarized macrophages produced increased amounts of immune-modulatory factors both in vitro and in vivo in a murine Th2 cell-type airway inflammation model upon LPS exposure. Our findings establish that IL-4-induced epigenetic reprogramming is responsible for the development of inflammatory hyperresponsiveness to TLR activation and contributes to lung pathologies.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk EGR2 IL-4 LPS STAT6 Th2-type airway inflammation epigenetic reprogramming inflammation macrophage synergistic gene activation
Megjelenés:	Immunity. - 55 : 11 (2022), p. 2006-2026.e6. -
További szerzők:	Halász László (1989-) (molekuláris biológus) Dániel Bence (1987-) (molekuláris biológus) Varga Zsófia (1992-) (molekuláris biológus) Bene Krisztián (1986-) (Biológus) Domokos Apolka Hoeksema, Marten Shen, Zeyang Berger, Wilhelm K. Silye-Cseh Timea (1985-) (Biológus) Jambrovics Károly (1988-) (biológus, gyógyszer-biotechnológus) Kolostyák Zsuzsanna Fenyvesi Ferenc (1977-) (gyógyszerész, gyógyszertechnológus) Váradi Judit (1973-) (gyógyszerész, gyógyszertechnológus) Póliska Szilárd (1978-) (biológus) Hajas György (1970-) (biológus) Szatmári István (1971-) (biológus) Glass, Christopher K. Bácsi Attila (1967-) (immunológus) Nagy László (1966-) (molekuláris sejtbiológus, biokémikus)
Pályázati támogatás:	R01DK115924 Egyéb DK124782 Egyéb KKP129909 Egyéb FK132185 Egyéb GINOP-2.3 2-15- 2016-0006 GINOP GINOP-2.3.2-15-2016-00050 GINOP K125337 NKFIH
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001-es BibID:	BIBFORM014050
Első szerző:	Kruzel, Marian L.
Cím:	Lactoferrin decreases LPS-induced mitochondrial dysfunction in cultured cells and in animal endotoxemia model / Marian L. Kruzel, Jeffrey K. Actor, Zsolt Radak, Attila Bacsi, Alfredo Saavedra-Molina, Istvan Boldogh
Dátum:	2010
ISSN:	1753-4259
Megjegyzések:	Lactoferrin is a non-heme iron-binding glycoprotein, produced by mucosal epithelial cells and granulocytes in most mammalian species. It is involved in regulation of immune responses, possesses anti-oxidant, anti-carcinogenic, anti-inflammatory properties, and provides protection against various microbial infections. In addition, lactoferrin has been implicated in protection against the development of insult-induced systemic inflammatory response syndrome (SIRS) and its progression into septic conditions in vivo. Here we show a potential mechanism by which lactoferrin lessens oxidative insult at the cellular and tissue levels after lipopolysaccharide (LPS) exposure. Lactoferrin pretreatment of cells decreased LPS-mediated oxidative insults in a dose-dependent manner. Lipopolysaccharide-induced oxidative burst was found to be of mitochondrial origin, and release of reactive oxygen species (ROS) was localized to the respiratory complex III. Importantly, lactoferrin nearly abolished LPS-induced increases in mitochondrial ROS generation and the accumulation of oxidative damage in the DNA. In vivo, pretreatment of experimental animals with lactoferrin significantly (P50.05) lowered LPS-induced mitochondrial dysfunction as shown by both decreased release of H2O2 and DNA damage in the mitochondria. In contrast, deferoxamine, an iron chelating compound, provided only partial protection in LPS-treated animals. Together, these data suggest that lactoferrin protects against oxidative insult at the mitochondrial level, and indicate a potential utility of lactoferrin in prevention and treatment of SIRS.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban DNA-DAMAGE HYDROGEN-PEROXIDE OXIDATIVE DAMAGE ROS GENERATION REPAIR MECHANISMS OXIDASES SEPSIS DEATH MTDNA
Megjelenés:	Innate Immunity 16 : 2 (2010), p. 67-79. -
További szerzők:	Actor, Jeffrey K. Radák Zsolt Bácsi Attila (1967-) (immunológus) Saavedra-Molina, Alfredo Boldogh István
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