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001-es BibID:	BIBFORM060604
035-os BibID:	(scopus)0035871630 (wos)000170948300037
Első szerző:	Gáspár Rezső (biofizikus)
Cím:	Clustering of class I HLA oligomers with CD8 and TCR: three-dimensional models based on fluorescence resonance energy transfer and crystallographic data / Rezső Gáspár Jr., Péter Bagossi, László Bene, János Matkó, János Szöllősi, József Tőzsér, László Fésüs, Thomas A. Waldmann, Sándor Damjanovich
Dátum:	2001
Megjegyzések:	Fluorescence resonance energy transfer (FRET) data, in accordance with lateral mobility measurements, suggested the existence of class I HLA dimers and oligomers at the surface of live human cells, including the B lymphoblast cell line (JY) used in the present study. Intra- and intermolecular class I HLA epitope distances were measured on JY B cells by FRET using fluorophoreconjugated Ag-binding fragments of mAbs W6/32 and L368 directed against structurally well-characterized heavy and light chain epitopes, respectively. Out-of-plane location of these epitopes relative to the membrane-bound BODIPY-PC (2-(4,4-difluoro-5-(4- phenyl-1,3-butadienyl)-4-bora-3a,4a-diaza-s-indacene-3-pentanoyl)-1-hexadecanoyl-sn-glycero-3-phosphocholine) was also determined by FRET. Computer-simulated docking of crystallographic structures of class I HLA and epitope-specific Ag-binding fragments, with experimentally determined interepitope and epitope to cell surface distances as constraints, revealed several sterically allowed and FRET-compatible class I HLA dimeric and tetrameric arrangements. Extension of the tetrameric class I HLA model with interacting TCR and CD8 resulted in a model of a supramolecular cluster that may exist physiologically and serve as a functionally significant unit for a network of CD8-HLA-I complexes providing enhanced signaling efficiency even at low MHC-peptide concentrations at the interface of effector and APCs.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Journal of immunology. - 166 : 8 (2001), p. 5078-5086. -
További szerzők:	Bagossi Péter (1966-2011) (biokémikus, vegyész) Bene László (1963-) (biofizikus) Matkó János (1952-) (biológus) Szöllősi János (1953-) (biofizikus) Tőzsér József (1959-) (molekuláris biológus, biokémikus, vegyész) Fésüs László (1947-) (orvos biokémikus) Waldmann, Thomas A. Damjanovich Sándor (1936-2017) (biofizikus)
Pályázati támogatás:	T029947 OTKA F020590 OTKA T019372 OTKA T030399 OTKA T023873 OTKA T030411 OTKA FKFP 327/2000 Egyéb ETT T05/102/2000 Egyéb FKFP 0518/99 Egyéb
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat DOI
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001-es BibID:	BIBFORM010313
Első szerző:	Zsíros Emese (orvos)
Cím:	Developmental switch of the expression of ion channels in human dendritic cells / Zsiros Emese, Kis-Tóth Katalin, Hajdú Péter, Gáspár Rezső, Joanna Bielansk, Antonio Felipe, Rajnavölgyi Éva, Panyi György
Dátum:	2009
ISSN:	0022-1767
Megjegyzések:	Modulation of the expression and activity of plasma membrane ion channels is one of the mechanisms by which immune cells can regulate their intracellular Ca2(+) signaling pathways required for proliferation and/or differentiation. Voltage-gated K+ channels, inwardly rectifying K+ channels, and Ca2+-activated K+ channels have been described to play a major role in controlling the membrane potential in lymphocytes and professional APCs, such as monocytes, macrophages, and dendritic cells (DCs). Our study aimed at the characterization and identification of ion channels expressed in the course of human DC differentiation from monocytes. We report in this study for the first time that immature monocyte-derived DCs express voltage-gated Na+ channels in their plasma membrane. The analysis of the biophysical and pharmacological properties of the current and PCR-based cloning revealed the presence of Nav1.7 channels in immature DCs. Transition from the immature to a mature differentiation state, however, was accompanied by the down-regulation of Nav1.7 expression concomitant with the up-regulation of voltage-gated Kv1.3 K+ channel expression. The presence of Kv1.3 channels seems to be common for immune cells; hence, selective Kv1.3 blockers may emerge as candidates for inhibiting various functions of mature DCs that involve their migratory, cytokine-secreting, and T cell-activating potential.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban Union of Pharmacology Dependent K+ channel Human Lymhocytes T Potassium channels Sodium Channels Electrophysiological properties Peripheral nerve Immune system Macrophages Activation
Megjelenés:	The Journal of Immunology 183 : 7 (2009), p. 4483-4492. -
További szerzők:	Kis-Tóth Katalin (1975-) (immunológus) Hajdu Péter (1975-) (biofizikus) Gáspár Rezső (1944-) (biofizikus) Bielansk, Joanna Felipe, Antonio Rajnavölgyi Éva (1950-) (immunológus) Panyi György (1966-) (biofizikus)
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