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001-es BibID:	BIBFORM020389
Első szerző:	Németh József (Pécs)
Cím:	Impaired capsaicin-induced decrease in heart rate and coronary flow in isolated heart of diabetic rats / J. Németh, Z. Szilvássy, G. Oroszi, R. Pórszász, B. Jakab, J. Szolcsányi
Dátum:	2001
ISSN:	1588-2683
Megjegyzések:	AbstractThe effect of capsaicin (0.1 microM) on heart rate and coronary flow was studied in Langendorff-perfused heart from streptozotocin-induced (50 mg/kg i.v.) diabetic rats where sensory neuropathy developed. In hearts from animals 4- and 8-week diabetes baseline heart rate and coronary flow decreased from 317.9 +/- 2.9 b.p.m. and 13.4 +/- 0.7 m/min to 255.1 +/- 12.7 and 219.8 +/- 2.8 b.p.m. and 8.9 +/- 0.6 and 10.0 +/- 0.1 ml/min (P<0.05), respectively. Capsaicin significantly decreased both variables in either normal or 4-week diabetic animals its effects, however, on coronary flow or heart rate were missing in preparations from 8-week diabetic rats. Endothelin-1 (0.1 nM), the putative mediator of the capsaicin effect, significantly decreased heart rate and coronary flow irrespective of the presence or absence of diabetes. In the femoral nerve of streptozotocin-treated animals conduction velocity involving both fast conducting A- and slow-conducting C-fibres was decreased proportional to the duration of the pre-existing diabetic state. It is concluded that in insulin deficient diabetes the diminished responses evoked by capsaicin on heart rate and coronary flow are signs of sensory neuropathy. This is related to a feeble endothelin release from sensory nerve endings without changes in post-receptor mechanisms mediating the endothelin effects.
Tárgyszavak:	Orvostudományok Gyógyszerészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban Impaired capsaicin-induced decrease in heart rate coronary flow decrease in coronary flow
Megjelenés:	Acta Physiologica Hungarica. - 88 : 3-4 (2001), p. 207-218. -
További szerzők:	Szilvássy Zoltán (1957-) (belgyógyász, farmakológus, klinikai farmakológus) Oroszi Gábor (Pécs) Pórszász Róbert (1965-) (farmakológus, klinikai farmakológus) Jakab Balázs (Pécs) Szolcsányi János (Pécs)
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001-es BibID:	BIBFORM043723
Első szerző:	Pintér Erika
Cím:	Pharmacological characterisation of the somatostatin analogue TT-232 : effects on neurogenic and non-neurogenic inflammation and neuropathic hyperalgesia / Pintér E., Helyes Zs., Németh J., Pórszász R., Pethő G., Thán M., Kéri G., Horváth A., Jakab B., Szolcsányi J.
Dátum:	2002
ISSN:	0028-1298
Megjegyzések:	The putative anti-inflammatory and anti-nociceptive activity of the heptapeptide somatostatin analogue TT-232 ( D-Phe-Cys-Tyr- D-Thr-Lys-Cys-Thr-NH(2)) was investigated in the rat and mouse, as well as its effect on neuropathic hyperalgesia, gastric ulceration and the release of sensory neuropeptides. In the rat, carrageenin-induced paw oedema was inhibited dose dependently by TT-232 (3x2.5-20 microg/kg i.v.). Evans blue accumulation induced by intraarticular bradykinin injection (0.5 nmol in 0.1 ml) was slightly, but significantly inhibited by a single TT-232 dose (5-20 microg/kg). Cutaneous neutrophil accumulation over a 3-h period after intradermal (i.d.) injection of carrageenin (1 mg/site) or interleukin 1beta (IL-1beta, 3 pmol/site) was inhibited significantly by TT-232 (3x80 microg/kg i.v.), while diclofenac (3x10 mg/kg i.v.) elicited significant inhibition only in the IL-1beta test. In the mouse, TT-232 potently decreased oedema formation induced by 2.5% capsaicin applied topically to the ear. Mechano-nociception in the rat hind-paw during neuropathic pain induced by partial sciatic nerve injury (model of Seltzer) was measured using the Randall-Selitto test. TT-232 (5-20 microg/kg i.p. on the 7th day after the operation) dose-dependently inhibited the mechano-nociceptive hyperalgesia. In vitro release of substance P (SP), calcitonin gene-related peptide (CGRP) and somatostatin from the isolated rat trachea in response to electrical field stimulation (40 V, 0.1 ms, 10 Hz, 120 s) of its nervous elements was inhibited significantly by 500 nM TT-232. The role of G protein-coupled receptors in the effect of TT-232 was indicated by the prevention of its inhibitory action on the release of sensory neuropeptides by incubation the tissue for 1 or 6 h with pertussis toxin (100 ng/ml). The release of sensory neuropeptides to in response to electrical nerve stimulation was not inhibited by a potent tyrosine kinase inhibitor, genistein (50 microM). TT-232 (up to 5 mg/kg i.p.) did not induce mucosal lesions in either the stomach or the duodenum. These data suggest that TT-232, a somatostatin analogue devoid of endocrine effects, is a promising lead molecule in the search for novel, broad-spectrum anti-inflammatory and analgesic agents.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Naunyn-Schmiedebergs Archives Of Pharmacology. - 366 : 2 (2002), p. 142-150. -
További szerzők:	Helyes Zsuzsanna Németh József (Pécs) Pórszász Róbert (1965-) (farmakológus, klinikai farmakológus) Pethő Gábor Thán Márta Kéri György Horváth Anikó Jakab Balázs (Pécs) Szolcsányi János (Pécs)
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