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001-es BibID:	BIBFORM005399
Első szerző:	Kéki Sándor (polimer kémikus)
Cím:	Photodecomposition of o-phthaldialdehyde-derivatized amino acids by the photodiode array detector during their high-performance liquid chromatographic analysis / Sándor Kéki, János Török, Bernadett Biri, Judit Zsuga, Rudolf Gesztelyi, Dániel Bereczki, Miklós Zsuga
Dátum:	2008
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Journal of Chromatography. A 1185 : 2 (2008), p. 301-304. -
További szerzők:	Török János Biri Bernadett (1986-) (vegyész) Zsuga Judit (1973-) (neurológus, pszichoterapeuta, egészségügyi szakmanager) Gesztelyi Rudolf (1969-) (kísérletes farmakológus) Bereczki Dániel (1960-) (neurológus) Zsuga Miklós (1944-) (polimer kémikus)
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001-es BibID:	BIBFORM037837
Első szerző:	Zsuga Judit (neurológus, pszichoterapeuta, egészségügyi szakmanager)
Cím:	Asymmetric dimethylarginine : a molecule responsible for the coexistence of insulin resistance and atherosclerosis via dual nitric oxide synthase inhibition / Zsuga Judit, Gesztelyi Rudolf, Török János, Kéki Sándor, Bereczki Dániel
Dátum:	2005
ISSN:	0306-9877
Megjegyzések:	Asymmetric dimethylarginine (ADMA) has been recently identified as the major endogenous inhibitor of soluble nitric oxide synthase. Its systemic accumulation was observed in conjunction with atherosclerosis and several cardiovascular and metabolic diseases. Here, we propose that ADMA causes insulin resistance by the inhibition of the neuronal isoform of nitric oxide synthase, while the simultaneously observed atherosclerosis is the consequence of endothelial nitric oxide synthase (NOS) inhibition. Our hypothesis rests on animal models in which experimental insulin resistance was induced by intraportal administration of non-selective and selective neuronal nitric oxide synthase inhibitors, N-methyl-L-arginine (L-NMMA) or 7-nitroindazole. In these models, loss of hepatic nitric oxide productions is presumed to hinder a very potent insulin sensitizing mechanism referred to as meal induced sensitization that is anatomically linked to the nitrergic fibers of the anterior hepatic plexus. Cause and effect relationship between ADMA and insulin resistance has been proposed previously by others however the nature of this relationship has not been elucidated in detail. In our hypothesis, we suggest that ADMA by inhibiting both the neuronal and the endothelial forms of NOS, results both in insulin resistance and in accelerated atherosclerosis, therefore ADMA is the molecule responsible for the coexistence of these two conditions. We also suggest animal models and human studies to test our hypothesis, the results of which may offer novel approaches in the prevention of insulin resistance and atherosclerosis.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Medical Hypotheses. - 65 : 6 (2005), p. 1091-1098. -
További szerzők:	Gesztelyi Rudolf (1969-) (kísérletes farmakológus) Török János Kéki Sándor (1964-) (polimer kémikus) Bereczki Dániel (1960-) (neurológus)
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001-es BibID:	BIBFORM001510
Első szerző:	Zsuga Judit (neurológus, pszichoterapeuta, egészségügyi szakmanager)
Cím:	Dimethylarginines at the crossroad of insulin resistance and atherosclerosis / Judit Zsuga, János Török, Mária T. Magyar, Attila Valikovics, Rudolf Gesztelyi, Ágota Lenkey, László Csiba, Sándor Kéki, Miklós Zsuga, Dániel Bereczki
Dátum:	2007
Megjegyzések:	We tested if asymmetric dimethylarginine (ADMA)contributes to the simultaneous evolution of atherosclerosis and insulin resistance. We investigated the significant predictors of insulin resistance in the context of atherosclerosis, focusing on the role ADMA, symmetric dimethylarginine (SDMA), and l-arginine play in a cohort of young atherosclerotic patients and their age-matched controls. In a case-control study, 60 patients younger than 55 years having at least 30% stenosis of the internal carotid artery and 30 age- and sex-matched controls were recruited at a community-based neurosonologic laboratory. We found a strong positive association between the homeostasis model assessment of beta-cell function and insulin resistance and the ADMA/SDMA ratio that remained statistically significant even after adjusting for all significant and a priori identified determinants (beta = 6.76; 95% confidence interval [CI], 2.13-11.39; P = .005). Interestingly, this relationship was even more pronounced in the atherosclerotic stratum (beta = 8.29; 95% CI, 1.43-15.15; P = .019), whereas, on multiple linear regression, lack of association was seen in subjects free of carotid atherosclerosis (beta = 1.39; 95% CI, -5.46 to 8.26; P = .671). We conclude that ADMA/SDMA ratio is a significant determinant of insulin resistance and may be a better parameter to monitor than ADMA alone. By accounting for the competition at the y+ transporters, ADMA/SDMA ratio could be an indicator of intracellular ADMA level.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Metabolism: Clinical and Experimental 56 : 3 (2007), p. 394-399. -
További szerzők:	Török János Magyar Mária Tünde (1970-) (neurológus) Valikovics Attila Gesztelyi Rudolf (1969-) (kísérletes farmakológus) Lenkey Ágota (1944-) (biológus) Csiba László (1952-) (neurológus, pszichiáter) Kéki Sándor (1964-) (polimer kémikus) Zsuga Miklós (1944-) (polimer kémikus) Bereczki Dániel (1960-) (neurológus)
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001-es BibID:	BIBFORM001509
Első szerző:	Zsuga Judit (neurológus, pszichoterapeuta, egészségügyi szakmanager)
Cím:	Serum asymmetric dimethylarginine negatively correlates with intima-media thickness in early-onset atherosclerosis / Judit Zsuga, Janos Török, Mária Tünde Magyar, Attila Valikovics, Rudolf Gesztelyi, Sándor Kéki, Laszló Csiba, Miklos Zsuga, Dániel Bereczki
Dátum:	2007
Megjegyzések:	Asymmetric dimethylarginine (ADMA) assumes a significant role in atherosclerosis by inhibiting the endothelial nitric oxide synthase (eNOS). Moreover, ADMA inhibits the inducible NOS (iNOS), the isoform that triggers atherosclerosis via peroxynitrite formation. Therefore, we investigated whether ADMA is a risk or protective factor in the atherosclerotic process. Intima-media thickness (IMT) of the common carotid artery, a surrogate for vascular diseases,was chosen as the outcome variable of interest. Methods: Sixty patients younger than 55 years having at least 30% stenosis of the internal carotid artery and 30 age- and gendermatched controls were recruited at a community-based neurosonological laboratory. We investigated relatively young patients to circumvent the confounding effect age has in the development of atherosclerosis. Results: The IMT showed a negative correlation with ADMA upon analysis of the pooled data (Spearman correlation coefficient -0.300, p = 0.0041) and the atherosclerotic stratum (Spearman correlation coefficient -0.323, p = 0.012). A multiple linear regression model containing all determinant factors of IMT previously identified by simple regression was used to further quantify the relationship between IMT and ADMA. Thenegative association between IMT and ADMA remained statistically significant ( beta: -0.510, CI: -0.894, -0.127; p = 0.010), furthermore it was even stronger in the atherosclerotic stratum( beta : -0.67, CI: -1.16, -0.18; p = 0.008). Conclusions: A minimal increase in ADMA concentration may be protective by inhibiting iNOS but not eNOS in states where iNOS is induced, e.g. inflammation accompanying atherosclerosis.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban atherosclerosis inflammation carotid arteries vascular risk factors nitric oxide synthase
Megjelenés:	Cerebrovascular Diseases 23 : 5-6 (2007), p. 388-394. -
További szerzők:	Török János Magyar Mária Tünde (1970-) (neurológus) Valikovics Attila Gesztelyi Rudolf (1969-) (kísérletes farmakológus) Kéki Sándor (1964-) (polimer kémikus) Csiba László (1952-) (neurológus, pszichiáter) Zsuga Miklós (1944-) (polimer kémikus) Bereczki Dániel (1960-) (neurológus)
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