Találati lista | Tudóstér

001-es BibID:	BIBFORM102091
035-os BibID:	(cikkazonosító)3039 (Wos)000794369800001 (Scopus)85130281120
Első szerző:	Csépányi Evelin (gyógyszerész)
Cím:	Beta-Carotene Affects the Effects of Heme Oxygenase-1 in Isolated, Ischemic/Reperfused Rat Hearts : potential Role of the Iron / Csepanyi Evelin, Gyongyosi Alexandra, Lekli Istvan, Tosaki Arpad, Bak Istvan
Dátum:	2022
ISSN:	1420-3049
Megjegyzések:	Abstract: Beta-carotene (BC) is a well-known antioxidant. However, increasing evidence shows that under severe oxidative conditions, BC can become pro-oxidant, an effect that may be enhanced in the presence of iron (II). In our earlier studies, we observed that despite increasing heme oxygenase-1 (HO-1) levels in the heart, the protective effects of BC have been lost when it was used at a high concentration. Since iron releases from heme as a consequence of HO-1 activity, we hypothesized that the application of an iron-chelator (IC) would reverse the lost cardiac protection associated with an elevated HO-1 level. Thus, in the present study, we investigated the effects of desferrioxiamine (DFO) in isolated, ischemic/reperfused rat hearts after long-term treatment with vehicle or high-dose (HD) BC. Vehicle or 150 mg/bw kg daily doses of BC were administered to the rats for 4 weeks, and then their hearts were removed and subjected to 30 min of global ischemia (ISA) followed by 120 min of reperfusion (REP). During the experiments, cardiac function was registered, and at the end of the REP period, infarct size (IS) and HO-1 expression were measured. The results show that DFO treatment alone during REP significantly ameliorated postischemic cardiac function and decreased IS, although HO-1 expression was not increased significantly. In hearts isolated from BC-treated rats, no cardioprotective effects, despite an elevated HO-1 level, were observed, while DFO administration after ISA resulted in a mild improvement in heart function and IS. Our results suggest that iron could have a role whether BC exerts antioxidant or pro-oxidant effects in ISA/REP-injured hearts.
Tárgyszavak:	Orvostudományok Gyógyszerészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Molecules. - 27 : 9 (2022), p. 1-12. -
További szerzők:	Gyöngyösi Alexandra (1990-) (táplálkozástudományi szakember) Lekli István (1981-) (gyógyszerész) Tósaki Árpád (1958-) (kísérletes farmakológus, gyógyszerész) Bak István (1975-) (vegyész, analitikus, farmakológus)
Pályázati támogatás:	GINOP-2.3.4-15-2020-00008 GINOP
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

001-es BibID:	BIBFORM070163
035-os BibID:	(WoS)000404517800086 (Scopus)85019668917
Első szerző:	Csépányi Evelin (gyógyszerész)
Cím:	Antioxidant Properties and Oxidative Transformation of Different Chromone Derivatives / Csepanyi Evelin, Szabados-Furjesi Peter, Kiss-Szikszai Attila, Frensemeier Lisa M., Karst Uwe, Lekli Istvan, Haines David D., Tosaki Arpad, Bak Istvan
Dátum:	2017
ISSN:	1420-3049
Tárgyszavak:	Orvostudományok Gyógyszerészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Molecules. - 22 : 4 (2017), p. 1-12. -
További szerzők:	Szabados-Fürjesi Péter (1988-) (vegyész) Kiss-Szikszai Attila (1975-) (vegyész) Frensemeier, Lisa M. Karst, Uwe Lekli István (1981-) (gyógyszerész) Haines, David Donald (1981-) (gyógyszerész) Tósaki Árpád (1958-) (kísérletes farmakológus, gyógyszerész) Bak István (1975-) (vegyész, analitikus, farmakológus)
Pályázati támogatás:	K-104017 OTKA PD-111794 OTKA GINOP-2.3.2-15-2016-00043 GINOP TÁMOP-4.2.4. A/2-11-1-2012-0001 TÁMOP
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

001-es BibID:	BIBFORM067980
035-os BibID:	(WoS)000398743500147 (Scopus)85016285017
Első szerző:	Czompa Attila (gyógyszerész)
Cím:	Effects of Momordica charantia (Bitter Melon) on Ischemic Diabetic Myocardium / Czompa Attila, Gyöngyösi Alexandra, Szőke Kitti, Bak István, Csépányi Evelin, David D. Haines, Tósaki Árpád, Lekli István
Dátum:	2017
ISSN:	1420-3049
Megjegyzések:	Objective: A rat model is here used to test a hypothesis that Momordica charantia (Bitter melon (BM)) extract favorably alters processes in cardiovascular tissue and is systemically relevant to the pathophysiology of type 2 diabetes (T2DM) and related cardiovascular disease. Methods: Male Lean and Zucker Obese (ZO) rats were gavage-treated for six weeks with 400 mg/kg body weight bitter melon (BM) extract suspended in mucin?water vehicle, or with vehicle (Control). Animals were segregated into four treatment groups, 10 animals in each group, according to strain (Lean or ZO) and treatment (Control or BM). Following six-week treatment periods, peripheral blood was collected from selected animals, followed by sacrifice, thoracotomy and mounting of isolated working heart setup. Results: Body mass of both Lean and ZO rats was unaffected by treatment, likewise, peripheral blood fasting glucose levels showed no significant treatment-related effects. However, some BM treatment-related improvement was noted in postischemic cardiac functions when Lean, BM-treated animals were compared to vehicle treated Lean control rats. Treatment of Lean, but not ZO, rats significantly reduced the magnitude of infarcted zone in isolated hearts subjected to 30 min of ischemia followed by 2 h of working mode reperfusion. Immunohistochemical demonstration of caspase-3 expression by isolated heart tissues subjected to 30 min of ischemia followed by 2 h of reperfusion, revealed significant correlation between BM treatment and reduced expression of this enzyme in hearts obtained from both Lean and ZO animals. The hierarchy and order of caspase-3 expression from highest to lowest was as follows: ZO rats receiving vehicle > ZO rats receiving BM extract > Lean rats treated receiving vehicle > Lean rats administered BM extract. Outcomes of analyses of peripheral blood content of cardiac-related analytics: with particular relevance to clinical application was a significant elevation in blood of ZO and ZO BM-treated, versus Lean rats of total cholesterol (high density lipoprotein HDL-c + low density lipoprotein LDL-c), with an inferred increase in HDL-c/LDL-c ratio?an outcome associated with decreased risk of atherosclerotic disease. Conclusions: BM extract failed to positively affect T2DM- and cardiovascular-related outcomes at a level suggesting use as a standalone treatment. Nevertheless, the encouraging effects of BM in enhancement of cardiac function, suppression of post-ischemic/reperfused infarct size extent and capacity to modulate serum cholesterol, will likely make it useful as an adjuvant therapy for the management of T2DM and related cardiovascular diseases.
Tárgyszavak:	Orvostudományok Gyógyszerészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Ischemia diabetes bitter melon
Megjelenés:	Molecules. - 22 : 3 (2017), p. 488. -
További szerzők:	Gyöngyösi Alexandra (1990-) (táplálkozástudományi szakember) Szőke Kitti (1989-) (gyógyszerész) Bak István (1975-) (vegyész, analitikus, farmakológus) Csépányi Evelin (1985-) (gyógyszerész) Haines, David Donald (1981-) (gyógyszerész) Tósaki Árpád (1958-) (kísérletes farmakológus, gyógyszerész) Lekli István (1981-) (gyógyszerész)
Pályázati támogatás:	OTKA-104017 OTKA TÁMOP-4.2.4. A/2-11-1-2012-0001 TÁMOP GINOP-2.3.2-15-2016-00043 Egyéb OTKA-PD-111794 Egyéb
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat DOI
Borító:
Saját polcon:

001-es BibID:	BIBFORM076284
035-os BibID:	(WoS)000454523000111 (Scopus)85057896269 (cikkazonosító)3161
Első szerző:	Szabados-Fürjesi Péter (vegyész)
Cím:	Synthesis, in Vitro Biological Evaluation, and Oxidative Transformation of New Flavonol Derivatives: The Possible Role of the Phenyl-N,N-Dimethylamino Group / Szabados-Furjesi Peter, Pajtas David, Barta Aliz, Csepanyi Evelin, Kiss-Szikszai Attila, Tosaki Arpad, Bak Istvan
Dátum:	2018
ISSN:	1420-3049
Megjegyzések:	Six new flavonols (6a?f) were synthesized with Claisen?Schmidt and Suzuki reactions and they were fully characterized by spectroscopic methods. In order to evaluate their antioxidant activities, their oxygen radical absorption capacity and ferric reducing antioxidant power were measured, along with their free radical scavenging activity against 2,2'-azino-bis(3- ethylbenzothiazoline-6-sulphonic acid) and 2,2-diphenyl-1-picrylhydrazylradicals. In addition, their cytotoxicity on H9c2 cardiomyoblast cells was also assessed by a 3-(4,5-dimethylthiazol-2-yl)- 2,5-diphenyltetrazolium bromide assay. Compounds bearing the phenyl-N,N-dimethylamino group (6a, 6c, and 6e) exhibited promising antioxidant potency and did not have any cytotoxic effect. After a consideration of these data, the oxidative transformation of the 6c compound was investigated in vitro with a chemical Fenton reaction and the identification of the formed oxidation products was performed by mass spectrometry. Two potential metabolites were detected. Based on these results, compound 6c can be a model compound for future developments. Overall, this work has proved the involvement of the phenyl-N,N-dimethylamino group in the antioxidant activity of flavonols.
Tárgyszavak:	Orvostudományok Gyógyszerészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk antioxidant flavonoid flavonol cytotoxicity oxidative metabolism
Megjelenés:	Molecules. - 23 : 12 (2018), p. 1-15. -
További szerzők:	Pajtás Dávid (1987-) (vegyész) Barta Aliz Csépányi Evelin (1985-) (gyógyszerész) Kiss-Szikszai Attila (1975-) (vegyész) Tósaki Árpád (1958-) (kísérletes farmakológus, gyógyszerész) Bak István (1975-) (vegyész, analitikus, farmakológus)
Pályázati támogatás:	GINOP-2.3.2-15-2016-00044 GINOP EFOP-3.6.1-16-2016-00022 EFOP -4.2.4. A/2-11-1-2012-0001 TÁMOP
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: