Találati lista | Tudóstér

001-es BibID:	BIBFORM003869
Első szerző:	Elekes Krisztián
Cím:	Inhibitory effects of synthetic somatostatin receptor subtype 4 agonists on acute and chronic airway inflammation and hyperreactivity in the mouse / Krisztián Elekes, Zsuzsanna Helyes, László Kereskai, Katalin Sándor, Erika Pintér, Gábor Pozsgai, Valéria Tékus, Ágnes Bánvölgyi, József Németh, Tamás Szűts, György Kéri, János Szolcsányi
Dátum:	2008
Megjegyzések:	Somatostatin released fromactivated capsaicin-sensitive afferents of the lung inhibits inflammation and related bronchial hyperreactivity presumably via somatostatin 4 receptors (sst4). The aim of this studywas to examine the effects of TT-232, a heptapeptide sst4/sst1 receptor agonist and J-2156, a high affinity sst4 receptor-selective peptidomimetic agonist in airway inflammation models. Acute pneumonitis was evoked by intranasal lipopolysaccharide 24 h before measurement. Chronic inflammation was induced by ovalbumin inhalation on days 28, 29 and 30 after i.p. sensitization on days 1 and 14. Semiquantitative histopathological scoring was based on perivascular/peribronchial oedema, neutrophil/macrophage infiltration, goblet cell hyperplasia in the acute model and eosinophil infiltration,mucosal oedema,mucus production and epithelial cell damage in chronic inflammation.Myeloperoxidase activity of the lung was measured spectrophotometrically to quantify granulocyte accumulation and the broncoalveolar lavage fluid was analysed by flow cytometry. Carbachol-induced bronchoconstriction was assessed by unrestrained whole body plethysmography and its calculated indicator, enhanced pause (Penh)was determined. TT-232 and J-2156 induced similar inhibition on granulocyte recruitment and histopathological changes in both models, although macrophage infiltration in LPS-induced inflammation was unaltered by either compounds. Both agonists diminished inflammatory airway hyperresponsiveness. Since their single administration after the development of the inflammatory reactions also inhibited carbachol-induced bronchoconstriction, somatostatin sst4 receptor activation on bronchial smooth muscle cells is likely to be involved in their anti-hyperreactivity effect. These results suggest that stable, somatostatin sst4 receptor-selective agonists could be potential candidates for the development of a completely novel group of anti-inflammatory drugs for the treatment of airway inflammation and hyperresponsiveness.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban Somatostatin sst4 receptor Interleukin-1beta Whole body plethysmography Ovalbumin Lipopolysaccharide Bronchial hyperreactivity Airway inflammation
Megjelenés:	European Journal of Pharmacology. - 578 : 2-3 (2008), p. 313-322. -
További szerzők:	Helyes Zsuzsanna Kereskai László Sándor Katalin Pintér Erika Pozsgai Gábor Tékus Valéria Bánvölgyi Ágnes Németh József (1954-) (vegyész, analitikus) Szűts Tamás Kéri György Szolcsányi János (Pécs)
Internet cím:	elektronikus változat DOI
Borító:
Saját polcon:

001-es BibID:	BIBFORM002463
Első szerző:	Elekes Krisztián
Cím:	Role of capsaicin-sensitive afferents and sensory neuropeptides / Krisztián Elekes, Zsuzsanna Helyes, József Németh, Katalin Sándor, Gábor Pozsgai, László Kereskai, Rita Börzsei, Erika Pintér, Árpád Szabó, János Szolcsányi
Dátum:	2007
Megjegyzések:	Substance P (SP) and calcitonin gene-related peptide (CGRP) released from capsaicin-sensitive afferents induce neurogenic inflammation via NK1, NK2 and CGRP1 receptor activation. This study examines the role of capsaicin-sensitive fibres and sensory neuropeptides in endotoxininduced airway inflammation and consequent bronchial hyperreactivity with functional, morphological and biochemical techniques in mice. Carbachol-induced bronchoconstriction was measured with whole body plethysmography 24 h after intranasal lipopolysaccharide administration. SP and CGRP were determined with radioimmunoassay, myeloperoxidase activity with spectrophotometry, interleukin-1? with ELISA and histopathological changes with semiquantitative scoring from lung samples. Treatments with resiniferatoxin for selective destruction of capsaicinsensitive afferents, NK1 antagonist SR 140333, NK2 antagonist SR 48968, their combination, or CGRP1 receptor antagonist CGRP(8-37) were performed. Lipopolysaccharide significantly increased lung SP and CGRP concentrations, which was prevented by resiniferatoxin pretreatment. Resiniferatoxin-desensitization markedly enhanced inflammation, but decreased bronchoconstriction. CGRP(8-37) or combination of SR 140333 and SR 48968 diminished neutrophil accumulation, MPO levels and IL-1? production, airway hyperresponsiveness was inhibited only by SR 48968. This is the first evidence that capsaicin-sensitive afferents exert a protective role in endotoxin-induced airway inflammation, but contribute to increased bronchoconstriction. Activation of CGRP1 receptors or NK1+NK2 receptors participate in granulocyte accumulation, but NK2 receptors play predominant role in enhanced airway resistance.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban Whole body plethysmography Myeloperoxidase activity NK1 receptor NK2 receptor CGRP1 receptor Somatostatin
Megjelenés:	Regulatory Peptides. - 141 : 1-3 (2007), p. 44-54. -
További szerzők:	Helyes Zsuzsanna Sándor Katalin Pozsgai Gábor Kereskai László Börzsei Rita Pintér Erika Szabó Árpád Szolcsányi János (Pécs) Németh József (1954-) (vegyész, analitikus)
Internet cím:	elektronikus változat DOI
Borító:
Saját polcon:

001-es BibID:	BIBFORM002467
Első szerző:	Helyes Zsuzsanna
Cím:	Inhibitory effect of PACAP-38 on acute neurogenic and non-neurogenic inflammatory processes in the rat / Z. Helyes, G. Pozsgai, R. Börzsei , J. Németh, T. Bagoly, L. Márk, E. Pintér, G. Tóth, K. Elekes, J. Szolcsányi, D. Reglodi
Dátum:	2007
Megjegyzések:	Inhibitory actions of pituitary adenylate cyclase activating polypeptide (PACAP) have been described on cellular/vascular inflammatory components, but there are few data concerning its role in neurogenic inflammation. In this study we measured PACAP-like immunoreactivity with radioimmunoassay in the rat plasma and showed a two-fold elevation in response to systemic stimulation of capsaicin-sensitive sensory nerves by resiniferatoxin, but not after local excitation of cutaneous afferents. Neurogenic plasma extravasation in the plantar skin induced by intraplantar capsaicin or resiniferatoxin, as well as carrageenaninduced paw edema were significantly diminished by intraperitoneal PACAP-38. In summary, these results demonstrate that PACAP is released from activated capsaicin-sensitive afferents into the systemic circulation. It diminishes acute pure neurogenic and mixed-type inflammatory reactions via inhibiting pro-inflammatory mediator release and/or by acting at post-junctional targets on the vascular endothelium.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban Capsaicin-sensitive sensory nerves
Megjelenés:	Peptides. - 28 : 9 (2007), p. 1847-1855. -
További szerzők:	Pozsgai Gábor Börzsei Rita Bagoly Teréz Márk László (1956-) (belgyógyász, kardiológus) Pintér Erika Tóth G. Elekes Krisztián Szolcsányi János (Pécs) Reglődi Dóra (Idegtudományok) Németh József (1954-) (vegyész, analitikus)
Internet cím:	elektronikus változat DOI
Borító:
Saját polcon:

001-es BibID:	BIBFORM002464
Első szerző:	Helyes Zsuzsanna
Cím:	Role of transient receptor potential vanilloid 1 receptors in endotoxin-induced / Zsuzsanna Helyes, Krisztián Elekes, József Németh, Gábor Pozsgai, Katalin Sándor, László Kereskai, Rita Börzsei, Erika Pintér, Árpád Szabó, János Szolcsányi
Dátum:	2007
Megjegyzések:	Airways are densely innervated by capsaicin-sensitive sensory neurons expressing transient receptor potential vanilloid 1 (TRPV1) receptors/ion channels, which play an important regulatory role in inflammatory processes via the release of sensory neuropeptides. The aim of the present study was to investigate the role of TRPV1 receptors in endotoxin-induced airway inflammation and consequent bronchial hyperreactivity with functional, morphological, and biochemical techniques using receptor gene-deficient mice. Inflammation was evoked by intranasal administration of Escherichia coli lipopolysaccharide (60 gammal, 167 gammag/ml) in TRPV1 knockout (TRPV1-/-) mice and their wild-type counterparts (TRPV1+/+) 24 h before measurement. Airway reactivity was assessed by unrestrained whole body plethysmography, and its quantitative indicator, enhanced pause (Penh), was calculated after inhalation of the bronchoconstrictor carbachol. Histological examination and spectrophotometric myeloperoxidase measurement was performed from the lung. Somatostatin concentration was measured in the lung and plasma with radioimmunoassay. Bronchial hyperreactivity, histological lesions (perivascular/peribronchial edema, neutrophil/ macrophage infiltration, goblet cell hyperplasia), and myeloperoxidase activity were significantly greater in TRPV-/- mice. Inflammation markedly elevated lung and plasma somatostatin concentrations in TRPV1+/+ but not TRPV1-/- animals. In TRPV1-/- mice, exogenous administration of somatostatin-14 (4 x 100 gamma g/kg ip) diminished inflammation and hyperreactivity. Furthermore, in wildtype mice, antagonizing somatostatin receptors by cyclo-somatostatin (4 x 250 gamma g/kg ip) increased these parameters. This study provides the first evidence for a novel counterregulatory mechanism during endotoxin-induced airway inflammation, which is mediated by somatostatin released from sensory nerve terminals in response to activation of TRPV1 receptors of the lung. It reaches the systemic circulation and inhibits inflammation and consequent bronchial hyperreactivity.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban capsaicin-sensitive afferents inflammatory airway hyperreactivity
Megjelenés:	American journal of physiology. Lung cellular and molecular physiology. - 292 (2007), p. L1173-L1181. -
További szerzők:	Sándor Katalin Szolcsányi János (Pécs) Szabó Árpád Pintér Erika Börzsei Rita Kereskai László Pozsgai Gábor Elekes Krisztián Németh József (1954-) (vegyész, analitikus)
Internet cím:	elektronikus változat DOI
Borító:
Saját polcon: