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Jakab AE, Horváth E, Molnár D, Bukva M, Bereczki C. Validation of the Meditech ABPM-06 24-hour blood pressure monitoring system in a pediatric population according to International Organization for Standardization Protocol 81060-2:2018. Blood Press Monit 2024:00126097-990000000-00102. [PMID: 38465742 DOI: 10.1097/mbp.0000000000000701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
OBJECTIVE Ambulatory blood pressure monitoring (ABPM) devices play a crucial role in diagnosing hypertension, not only in adults but also in pediatric patients. ABPM-06, the latest oscillometric device from Meditech Ltd. (Budapest, Hungary), is the focus of this study. The objective was to validate the ABPM-06 device using the International Organization for Standardization (ISO) 81060-2 : 2018 standard. METHODS A total of 86 healthy patients, consisting of 34 males and 52 females, aged between 3 and 17 years, were enrolled in this study. During the ambulatory phase, a total of 50 patients were enrolled, with 35 patients falling within the 3- to 12-year-old age range and 15 patients aged between 12 and 17 years. Additionally, for the dynamic test, 36 patients were selected, comprising of 10 individuals aged 3-12 years and 26 patients aged 12-17 years. These patients were recruited from the outpatient clinics of the Department of Pediatrics at Albert Szent-Györgyi University in Szeged, Hungary. The validation process involved utilizing the same-arm sequence protocol, both in resting positions and during stress testing. RESULTS The ABPM-06 performed well in both clinical and ambulatory validations. In terms of validation criterion 1, the mean ± SD of the differences between the test device and reference blood pressure readings was -1.3 ± 3.5 mmHg for systolic and -0.1 ± 2.3 mmHg for diastolic, in children under the age of 12 years. For those over the age of 12 years, the mean ± SD of the differences was -2.8 ± 4.6 mmHg for systolic and -0.5 ± 2.7 mmHg for diastolic. Regarding the ambulatory validation, for children under 12 years old, the mean ± SD of the differences was -1.3 ± 3.5 mmHg for systolic and -0.1 ± 2.3 mmHg for diastolic. In the age group above 12 years, the mean ± SD of the differences was -2.8 ± 4.6 mmHg for systolic and -0.5 ± 2.7 mmHg for diastolic. Both tests successfully met the established criteria regarding the mean and SD values of the differences between the device readings and the observed SBP and DBP measurements. CONCLUSION The ABPM-06 oscillometric device fully adheres to the ISO 81060-2 : 2018 standard requirements for ABPM determination in the pediatric population (ages 3-17 years). Consequently, this ABPM device proves to be suitable for effectively managing hypertension in children and adolescents.
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Affiliation(s)
- Andrea E Jakab
- Department of Pediatrics and Pediatric Health Center, Albert Szent-Györgyi Health Centre, University of Szeged Albert Szent-Györgyi Medical School, Korányi fasor, Szeged, Hungary
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Horváth E, Kulman K, Tompa B, Hajnal ÁB, Pelsőczi A, Bela K, Gallé Á, Csiszár J. Glutathione Transferases Are Involved in the Genotype-Specific Salt-Stress Response of Tomato Plants. Antioxidants (Basel) 2023; 12:1682. [PMID: 37759985 PMCID: PMC10525892 DOI: 10.3390/antiox12091682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 08/22/2023] [Accepted: 08/24/2023] [Indexed: 09/29/2023] Open
Abstract
Glutathione transferases (GSTs) are one of the most versatile multigenic enzyme superfamilies. In our experiments, the involvement of the genotype-specific induction of GST genes and glutathione- or redox-related genes in pathways regulating salt-stress tolerance was examined in tomato cultivars (Solanum lycopersicum Moneymaker, Mobil, and Elán F1). The growth of the Mobil plants was adversely affected during salt stress (100 mM of NaCl), which might be the result of lowered glutathione and ascorbate levels, a more positive glutathione redox potential (EGSH), and reduced glutathione reductase (GR) and GST activities. In contrast, the Moneymaker and Elán F1 cultivars were able to restore their growth and exhibited higher GR and inducible GST activities, as well as elevated, non-enzymatic antioxidant levels, indicating their enhanced salt tolerance. Furthermore, the expression patterns of GR, selected GST, and transcription factor genes differed significantly among the three cultivars, highlighting the distinct regulatory mechanisms of the tomato genotypes during salt stress. The correlations between EGSH and gene expression data revealed several robust, cultivar-specific associations, underscoring the complexity of the stress response mechanism in tomatoes. Our results support the cultivar-specific roles of distinct GST genes during the salt-stress response, which, along with WRKY3, WRKY72, DREB1, and DREB2, are important players in shaping the redox status and the development of a more efficient stress tolerance in tomatoes.
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Affiliation(s)
- Edit Horváth
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, H-6726 Szeged, Hungary; (K.K.); (B.T.); (Á.B.H.); (A.P.); (K.B.); (Á.G.); (J.C.)
| | - Kitti Kulman
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, H-6726 Szeged, Hungary; (K.K.); (B.T.); (Á.B.H.); (A.P.); (K.B.); (Á.G.); (J.C.)
- Agricultural Institute, Centre for Agricultural Research, Eötvös Lóránd Research Network, H-2462 Martonvásár, Hungary
| | - Bernát Tompa
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, H-6726 Szeged, Hungary; (K.K.); (B.T.); (Á.B.H.); (A.P.); (K.B.); (Á.G.); (J.C.)
- Doctoral School in Biology, Faculty of Science and Informatics, University of Szeged, H-6726 Szeged, Hungary
| | - Ádám Barnabás Hajnal
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, H-6726 Szeged, Hungary; (K.K.); (B.T.); (Á.B.H.); (A.P.); (K.B.); (Á.G.); (J.C.)
- Doctoral School in Biology, Faculty of Science and Informatics, University of Szeged, H-6726 Szeged, Hungary
| | - Alina Pelsőczi
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, H-6726 Szeged, Hungary; (K.K.); (B.T.); (Á.B.H.); (A.P.); (K.B.); (Á.G.); (J.C.)
- Doctoral School in Biology, Faculty of Science and Informatics, University of Szeged, H-6726 Szeged, Hungary
| | - Krisztina Bela
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, H-6726 Szeged, Hungary; (K.K.); (B.T.); (Á.B.H.); (A.P.); (K.B.); (Á.G.); (J.C.)
| | - Ágnes Gallé
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, H-6726 Szeged, Hungary; (K.K.); (B.T.); (Á.B.H.); (A.P.); (K.B.); (Á.G.); (J.C.)
| | - Jolán Csiszár
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, H-6726 Szeged, Hungary; (K.K.); (B.T.); (Á.B.H.); (A.P.); (K.B.); (Á.G.); (J.C.)
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Riyazuddin R, Bela K, Poór P, Szepesi Á, Horváth E, Rigó G, Szabados L, Fehér A, Csiszár J. Crosstalk between the Arabidopsis Glutathione Peroxidase-Like 5 Isoenzyme (AtGPXL5) and Ethylene. Int J Mol Sci 2022; 23:ijms23105749. [PMID: 35628560 PMCID: PMC9171577 DOI: 10.3390/ijms23105749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 05/16/2022] [Accepted: 05/17/2022] [Indexed: 01/27/2023] Open
Abstract
Glutathione peroxidases (GPXs) are important antioxidant enzymes in animals. Plants contain GPX-like (GPXL) enzymes, which-in contrast to GPXs-contain cysteine in their active site instead of selenocysteine. Although several studies proved their importance in development and stress responses, their interaction with ethylene (ET) signalling is not known. Our aim was to investigate the involvement of AtGPXL5 in ET biosynthesis and/or signalling using Atgpxl5 mutant and AtGPXL5 cDNA-overexpressing (OX-AtGPXL5) lines. Four-day-old dark-grown Atgpxl5 seedlings had shorter hypocotyls and primary roots, while OX-AtGPXL5 seedlings exhibited a similar phenotype as wild type under normal conditions. Six-week-old OX-AtGPXL5 plants contained less H2O2 and malondialdehyde, but higher polyamine and similar ascorbate- and glutathione contents and redox potential (EGSH) than the Col-0. One-day treatment with the ET-precursor 1-aminocyclopropane-1-carboxylic acid (ACC) induced the activity of glutathione- and thioredoxin peroxidases and some other ROS-processing enzymes. In the Atgpxl5 mutants, the EGSH became more oxidised; parallelly, it produced more ethylene after the ACC treatment than other genotypes. Although the enhanced ET evolution measured in the Atgpxl5 mutant can be the result of the increased ROS level, the altered expression pattern of ET-related genes both in the Atgpxl5 and OX-AtGPXL5 plants suggests the interplay between AtGPXL5 and ethylene signalling.
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Affiliation(s)
- Riyazuddin Riyazuddin
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (R.R.); (K.B.); (P.P.); (Á.S.); (E.H.); (A.F.)
- Biological Research Centre, Institute of Plant Biology, Temesvári krt. 62., H-6726 Szeged, Hungary; (G.R.); (L.S.)
| | - Krisztina Bela
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (R.R.); (K.B.); (P.P.); (Á.S.); (E.H.); (A.F.)
| | - Péter Poór
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (R.R.); (K.B.); (P.P.); (Á.S.); (E.H.); (A.F.)
| | - Ágnes Szepesi
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (R.R.); (K.B.); (P.P.); (Á.S.); (E.H.); (A.F.)
| | - Edit Horváth
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (R.R.); (K.B.); (P.P.); (Á.S.); (E.H.); (A.F.)
| | - Gábor Rigó
- Biological Research Centre, Institute of Plant Biology, Temesvári krt. 62., H-6726 Szeged, Hungary; (G.R.); (L.S.)
| | - László Szabados
- Biological Research Centre, Institute of Plant Biology, Temesvári krt. 62., H-6726 Szeged, Hungary; (G.R.); (L.S.)
| | - Attila Fehér
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (R.R.); (K.B.); (P.P.); (Á.S.); (E.H.); (A.F.)
- Biological Research Centre, Institute of Plant Biology, Temesvári krt. 62., H-6726 Szeged, Hungary; (G.R.); (L.S.)
| | - Jolán Csiszár
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (R.R.); (K.B.); (P.P.); (Á.S.); (E.H.); (A.F.)
- Correspondence:
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Gallé Á, Bela K, Hajnal Á, Faragó N, Horváth E, Horváth M, Puskás L, Csiszár J. Crosstalk between the redox signalling and the detoxification: GSTs under redox control? Plant Physiol Biochem 2021; 169:149-159. [PMID: 34798389 DOI: 10.1016/j.plaphy.2021.11.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/24/2021] [Accepted: 11/08/2021] [Indexed: 06/13/2023]
Abstract
Reactive oxygen species (ROS), antioxidants and their reduction-oxidation (redox) states all contribute to the redox homeostasis, but glutathione is considered to be the master regulator of it. We aimed to understand the relationship between the redox potential and the diverse glutathione transferase (GST) enzyme family by comparing the stress responses of two tomato cultivars (Solanum lycopersicum 'Moneymaker' and 'Ailsa Craig'). Four-week-old plants were treated by two concentrations of mannitol, NaCl and salicylic acid. The lower H2O2 and malondialdehyde contents indicated higher stress tolerance of 'Moneymaker'. The redox status of roots was characterized by measuring the reduced and oxidized form of ascorbate and glutathione spectrophotometrically after 24 h. The redox potential of 'Ailsa Craig' was more oxidized compared to 'Moneymaker' even under control conditions and became more positive due to treatments. High-throughput quantitative real-time PCR revealed that besides overall higher expression levels, SlGSTs were activated more efficiently in 'Moneymaker' due to stresses, resulting in generally higher GST and glutathione peroxidase activities compared to 'Ailsa Craig'. The expression level of SlGSTs correlated differently, however Pearson's correlation analysis showed usually strong positive correlation between SlGST transcription and glutathione redox potential. The possible redox regulation of SlGST expressions was discussed.
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Affiliation(s)
- Ágnes Gallé
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, 6726, Szeged, Hungary
| | - Krisztina Bela
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, 6726, Szeged, Hungary
| | - Ádám Hajnal
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, 6726, Szeged, Hungary
| | - Nóra Faragó
- Avidin Ltd., Alsó Kikötő sor 11/D, Szeged, 6726, Hungary; Laboratory of Functional Genomics, Biological Research Centre, Temesvári körút 62, Szeged, 6726, Hungary; Research Group for Cortical Microcircuits of the Hungarian Academy of Sciences, Department of Physiology, Anatomy and Neuroscience, University of Szeged, Közép fasor 52, Szeged, 6726, Hungary
| | - Edit Horváth
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, 6726, Szeged, Hungary
| | - Mátyás Horváth
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, 6726, Szeged, Hungary
| | - László Puskás
- Avidin Ltd., Alsó Kikötő sor 11/D, Szeged, 6726, Hungary; Laboratory of Functional Genomics, Biological Research Centre, Temesvári körút 62, Szeged, 6726, Hungary
| | - Jolán Csiszár
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, 6726, Szeged, Hungary.
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Paulik E, Horváth E, Szabó A, Polanek E, Gyurkovits Z, Németh G, Orvos H. Vitamin D status and its influencing factors among pregnant women in Szeged, Hungary. Eur J Public Health 2021. [DOI: 10.1093/eurpub/ckab164.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
During pregnancy vitamin D plays an important role in maternal and fetal immune regulation as well. The aim of our study was to evaluate vitamin D serum level and its influencing factors among pregnant women and their newborns.
Methods
A cross-sectional study was performed among women delivering at the Department of Obstetrics and Gynecology in 2019. Altogether 301 women were included into the study, who filled the questionnaire one or two days after delivery. Data collection was based on a self-administered questionnaire, health documentation, and maternal serum and infant cord-blood vitamin D laboratory tests. Vitamin D intake was evaluated by dietary and vitamin D containing dietary supplement intake. Statistical analyses (descriptive statistics, chi square, Pearson's correlation, Kruskal-Wallis test) were performed with the IBM SPSS 26.0 program. The study protocol was approved by the Research Ethics Committee of the University of Szeged (number: 4419). Written informed consent was obtained from each participant of the study.
Results
The average maternal age of the included women was 33.28 years. More than half of women did not eat sea fish during the pregnancy, 66.3% drank daily milk, 51.5% ate daily yoghurt, and 30.2% used daily margarine as a spread. During pregnancy 77.6% of included women took some kind of vitamin D containing dietary supplement with which their average daily vitamin-D supplementation was 17.19 microgram (SD = 22.45 microgram). The average serum vitamin D level was 52.81 nmol/L in mothers and 72.96 nmol/L in newborns' cord-blood. Only 12.1% of mothers, and 43.1% of their newborns reached the optimal (75 nmol/L) level.
Conclusions
Our results showed that dietary and supplementary vitamin-D intake are insufficient among pregnant women, and consequently vitamin D serum levels are also lower than the optimal among mothers and their newborns, consequently.
Grant support: University of Szeged, Faculty of Medicine, Hetényi Géza Grant
Key messages
Low vitamin D level is a global public health issue. Vitamin D supplementation during pregnancy is important to maintain the optimal vitamin D serum level.
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Affiliation(s)
| | - E Horváth
- Department of Public Health, University of Szeged, Szeged, Hungary
| | - A Szabó
- Department of Public Health, University of Szeged, Szeged, Hungary
| | - E Polanek
- Department of Public Health, University of Szeged, Szeged, Hungary
| | - Z Gyurkovits
- Department of Obstetrics and Gynecology, University of Szeged, Szeged, Hungary
| | - G Németh
- Department of Obstetrics and Gynecology, University of Szeged, Szeged, Hungary
| | - H Orvos
- Department of Obstetrics and Gynecology, University of Szeged, Szeged, Hungary
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Paulik E, Horváth E, Szabó A, Polanek E, Gyurkovits Z, Németh G, Orvos H. Health consciousness during pregnancy: the association between dietary supplementation and lifestyle. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa166.983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Dietary supplements are recommended for pregnant women who cannot meet the daily dose through food intake, or who are at higher risk of deficiencies because of a substance abuse (e.g. smoking). Today, the preventive effect of folic acid (FoA) in the periconceptional period is evidence based, and there are studies about the positive effects of omega-3 fatty acids (n-3 FAs) during pregnancy. The aim of this study was to determine the association between FoA and n-3 FAs supplementation and health behavior - diet, physical activity, smoking - of pregnant women.
Methods
The cross-sectional study was conducted among women having their babies at the Department of Obstetrics and Gynecology (N = 1548). Data collection was based on self-administered questionnaire and health documentation. Uni- and multivariable logistic regression analyses were performed with IBM SPSS 26.0; the results are expressed in odds ratios (OR) and 95% confidence intervals (CI).
Results
Mean age of women was 31 years, most of them had university degree, nearly 90% of them lived in partnership. The prevalence of smoking during pregnancy was 6.5%, 39.8% did not consume fruits/vegetables daily, 58.5% ate fish less than weekly, 47.9% were physically inactive; 67.6% took FoA, and 30.6% n-3 FAs. FoA and n-3 FAs taking were more likely among those who ate fruits and vegetables every day (OR/CI: 1.30/1.01-1.66; 1.47/1.15-1.89) and among non-smokers (OR/CI: 1.73/1.06-2.83; 4.80/1.69-13.61), while FoA consumption associated with physical activity (OR/CI: 1.37/1.07-1.74) and n-3 FAs with fish consumption (OR/CI: 1.35/1.06-1.72).
Conclusions
Our results showed that a high proportion of pregnant women did not follow a healthy lifestyle, and the unhealthy behavior was significantly associated with the less frequent use of dietary supplementation. The results call the attention for the importance of counseling on healthy lifestyle and appropriate supplement use before and during pregnancy.
Key messages
Use of dietary supplementation is higher among pregnant women following a healthy way of lifestyle. The results reinforce the importance of lifestyle counseling during pregnant care.
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Affiliation(s)
- E Paulik
- Department of Public Health, University of Szeged, Szeged, Hungary
| | - E Horváth
- Department of Public Health, University of Szeged, Szeged, Hungary
| | - A Szabó
- Department of Public Health, University of Szeged, Szeged, Hungary
| | - E Polanek
- Department of Public Health, University of Szeged, Szeged, Hungary
| | - Z Gyurkovits
- Department of Obstetrics and Gynecology, University of Szeged, Szeged, Hungary
| | - G Németh
- Department of Obstetrics and Gynecology, University of Szeged, Szeged, Hungary
| | - H Orvos
- Department of Obstetrics and Gynecology, University of Szeged, Szeged, Hungary
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Cerezuela P, García Escobar I, Salgado M, Molina R, Araújo A, Horváth E, Porta-Balanya R, Benitez Montanez J, Lobo de Mena M, Font C, Martí E, Garicano F, Campos Balea B, Martínez de Castro E, Malheiro M, Costa A, Colomé E, Castellón Rubio V, Gallardo E, Trujillo Santos J. 1823P Characterization of thrombosis risk in patients with cancer: Preliminary results. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Horváth E, Szabó A, Erdős CS, Dobi-Ágoston G, Paulik E. Factors influencing obesity among Hungarian school-age children. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa166.256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Childhood obesity has increased almost 80% worldwide in the last 30 years. According to WHO COSI data, Hungary is ranked 15th in the prevalence of overweight/obesity in 6-9 years children, with national values (27.4%) higher than the average of the participating countries. The aim of the study was to investigate the factors contributing to childhood obesity, along some components of the ecological model, and to identify factors promoting or inhibiting lifestyle changes.
Methods
The survey was conducted in three primary schools of Szeged, involving 9-12 years old children and their parents (N = 459). The questionnaire examined the child's physical activity, dietary habits, mood, postnatal medical history as well as parents' anthropometric, socio-demographic data, attitudes to their child's nutrition, health-related value system, lifestyle knowledge and relevant history of obesity.
Results
The prevalence of overweight/obesity was 22.7% in the sample, with higher proportion of boys than girls (59.6% vs. 40.4%). Overweight/obese children were significantly more dissatisfied with their shape than children with normal BMI (39.8% vs. 8.9%, p < 0.001) and fewer of them participated in out-of-school sports activities (69.1% vs. 79.1 %, p > 0.05;). Obese children were significantly more likely to eat even when they were not hungry (37.2% vs. 26.4%, p < 0.05). Frequency of meals with the family was also the lowest among overweight/obese (60.6%), and three times as many of them ate alone in their room than their nutritionally normal fellows. There was no significant difference in the diet preferences and quality of food of the two groups.
Conclusions
In our study, prevalence of childhood obesity was beyond than global prevalence. Parents' attitudes, and family conventions significantly influenced the success of a child's lifestyle change hence it is high priority to increase the knowledge of the parents.
Funding
The research is supported by the EFOP-3.6.1-16-2016-00008.
Key messages
Childhood obesity is a complex problem, simultaneous, positive modification of the family, community, and social environment is indispensable for effective intervention. Parents’ lifestyle influences the children’s dietary habits, therefore parent’s health education is important in the prevention of childhood obesity.
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Affiliation(s)
- E Horváth
- Department of Public Health, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - A Szabó
- Department of Public Health, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - C s Erdős
- Department of Public Health, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - G Dobi-Ágoston
- Department of Public Health, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - E Paulik
- Department of Public Health, Faculty of Medicine, University of Szeged, Szeged, Hungary
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Horváth E, Bela K, Gallé Á, Riyazuddin R, Csomor G, Csenki D, Csiszár J. Compensation of Mutation in Arabidopsis glutathione transferase ( AtGSTU) Genes under Control or Salt Stress Conditions. Int J Mol Sci 2020; 21:E2349. [PMID: 32231125 PMCID: PMC7177659 DOI: 10.3390/ijms21072349] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 03/19/2020] [Accepted: 03/26/2020] [Indexed: 12/19/2022] Open
Abstract
Glutathione transferases (GSTs) play a crucial role in detoxification processes due to the fact of their glutathione (GSH) conjugating activity, and through glutathione peroxidase or dehydroascorbate reductase (DHAR) activities, they influence the redox state of GSH and ascorbate (AsA). The plant-specific tau (GSTU) group is the largest class of Arabidopsis GSTs, and their members are involved in responses to different abiotic stresses. We investigated the effect of salt stress on two-week-old Arabidopsis thaliana wild-type (Col-0), Atgstu19 and Atgstu24 mutant plants after applying 150 mM NaCl for two days. The Atgstu19 seedlings had lower GST activity and vitality both under control conditions and after salt stress than the wild-type, but the level of total ROS was similar to the Col-0 plants. The GST activity of the knockout Atgstu24 mutant was even higher under control conditions compared to the Col-0 plants, while the ROS level and its vitality did not differ significantly from the wild-type. Analysis of the AtGSTU expression pattern revealed that the mutation in a single AtGSTU gene was accompanied by the up- and downregulation of several other AtGSTUs. Moreover, elevated AsA and GSH levels, an altered GSH redox potential and increased DHAR and glutathione reductase activities could help to compensate for the mutation of AtGSTU genes. The observed changes in the mutants suggest that the investigated isoenzymes influence the redox homeostasis under control conditions and after NaCl treatment in Arabidopsis seedlings. These data indicate for the first time the more general role of a temporary shift of redox status as part of GST mechanisms and regulation.
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Affiliation(s)
- Edit Horváth
- Institute of Plant Biology, Biological Research Centre, Temesvári krt. 62., H-6726 Szeged, Hungary;
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (K.B.); (R.R.); (G.C.); (D.C.)
| | - Krisztina Bela
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (K.B.); (R.R.); (G.C.); (D.C.)
| | - Ágnes Gallé
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (K.B.); (R.R.); (G.C.); (D.C.)
| | - Riyazuddin Riyazuddin
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (K.B.); (R.R.); (G.C.); (D.C.)
- Doctoral School in Biology, Faculty of Science and Informatics, University of Szeged, H-6726 Szeged, Hungary
| | - Gábor Csomor
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (K.B.); (R.R.); (G.C.); (D.C.)
| | - Dorottya Csenki
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (K.B.); (R.R.); (G.C.); (D.C.)
| | - Jolán Csiszár
- Department of Plant Biology, Faculty of Sciences and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary; (K.B.); (R.R.); (G.C.); (D.C.)
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10
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Horváth E, Bela K, Holinka B, Riyazuddin R, Gallé Á, Hajnal Á, Hurton Á, Fehér A, Csiszár J. The Arabidopsis glutathione transferases, AtGSTF8 and AtGSTU19 are involved in the maintenance of root redox homeostasis affecting meristem size and salt stress sensitivity. Plant Sci 2019; 283:366-374. [PMID: 31128707 DOI: 10.1016/j.plantsci.2019.02.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 02/05/2019] [Accepted: 02/06/2019] [Indexed: 05/28/2023]
Abstract
The tau (U) and phi (F) classes of glutathione transferase (GST) enzymes reduce the glutathione (GSH) pool using GSH as a co-substrate, thus influence numerous redox-dependent processes including hormonal and stress responses. We performed detailed analysis of the redox potential and reactive oxygen species levels in longitudinal zones of 7-day-old roots of Arabidopsis thaliana L. Col-0 wild type and Atsgtf8 and Atgstu19 insertional mutants. Using redox-sensitive cytosolic green fluorescent protein (roGFP2) the redox status of the meristematic, transition, and elongation zones was determined under control and salt stress (3-hour of 75 or 150 mM NaCl treatment) conditions. The Atgstu19 mutant had the most oxidized redox status in all root zones throughout the experiments. Using fluorescent dyes significantly higher superoxide radical (O2-) levels was detected in both Atgst mutants than in the Col-0 control. Salt treatment resulted in the highest O2- increase in the Atgstf8 root, while the amount of H2O2 elevated most in the case of Atgstu19. Moreover, vitality decreased in Atgstu19 roots more than in wild type under salt stress. Our results indicate that AtGSTF8 and especially the AtGSTU19 proteins function in the root fine-tuning the redox homeostasis both under control and salt stress conditions.
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Affiliation(s)
- Edit Horváth
- Institute of Plant Biology, Biological Research Centre of HAS, Temesvári krt. 62., H-6726, Szeged, Hungary.
| | - Krisztina Bela
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726, Szeged, Hungary
| | - Botond Holinka
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726, Szeged, Hungary
| | - Riyazuddin Riyazuddin
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726, Szeged, Hungary; Doctoral School in Biology, Faculty of Science and Informatics, University of Szeged, Szeged, Hungary
| | - Ágnes Gallé
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726, Szeged, Hungary
| | - Ádám Hajnal
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726, Szeged, Hungary
| | - Ágnes Hurton
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726, Szeged, Hungary
| | - Attila Fehér
- Institute of Plant Biology, Biological Research Centre of HAS, Temesvári krt. 62., H-6726, Szeged, Hungary; Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726, Szeged, Hungary
| | - Jolán Csiszár
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726, Szeged, Hungary
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11
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Gallé Á, Czékus Z, Bela K, Horváth E, Ördög A, Csiszár J, Poór P. Plant Glutathione Transferases and Light. Front Plant Sci 2019; 9:1944. [PMID: 30687349 PMCID: PMC6333738 DOI: 10.3389/fpls.2018.01944] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 12/13/2018] [Indexed: 05/09/2023]
Abstract
The activity and expression of glutathione transferases (GSTs) depend on several less-known endogenous and well-described exogenous factors, such as the developmental stage, presence, and intensity of different stressors, as well as on the absence or presence and quality of light, which to date have received less attention. In this review, we focus on discussing the role of circadian rhythm, light quality, and intensity in the regulation of plant GSTs. Recent studies demonstrate that diurnal regulation can be recognized in GST activity and gene expression in several plant species. In addition, the content of one of their co-substrates, reduced glutathione (GSH), also shows diurnal changes. Darkness, low light or shade mostly reduces GST activity, while high or excess light significantly elevates both the activity and expression of GSTs and GSH levels. Besides the light-regulated induction and dark inactivation of GSTs, these enzymes can also participate in the signal transduction of visible and UV light. For example, red light may alleviate the harmful effects of pathogens and abiotic stressors by increasing GST activity and expression, as well as GSH content in leaves of different plant species. Based on this knowledge, further research on plants (crops and weeds) or organs and temporal regulation of GST activity and gene expression is necessary for understanding the complex regulation of plant GSTs under various light conditions in order to increase the yield and stress tolerance of plants in the changing environment.
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Affiliation(s)
- Ágnes Gallé
- Department of Plant Biology, Faculty of Science and InformaticsUniversity of Szeged, Szeged, Hungary
| | - Zalán Czékus
- Department of Plant Biology, Faculty of Science and InformaticsUniversity of Szeged, Szeged, Hungary
| | - Krisztina Bela
- Department of Plant Biology, Faculty of Science and InformaticsUniversity of Szeged, Szeged, Hungary
| | - Edit Horváth
- Biological Research CentreInstitute of Plant Biology, Szeged, Hungary
| | - Attila Ördög
- Department of Plant Biology, Faculty of Science and InformaticsUniversity of Szeged, Szeged, Hungary
| | - Jolán Csiszár
- Department of Plant Biology, Faculty of Science and InformaticsUniversity of Szeged, Szeged, Hungary
| | - Péter Poór
- Department of Plant Biology, Faculty of Science and InformaticsUniversity of Szeged, Szeged, Hungary
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12
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Abstract
Although the participation of glutathione transferases (GSTs) in light-dependent pathways and the circadian changes in the whole detoxification system have been studied, there are fewer results regarding the exact daily fluctuation of GSTs. In the present study, it was demonstrated that light up-regulated, while dark period decreased the plant GST activity and the expression of the selected tau group GST genes in tomato. These findings provide additional information on our current knowledge on the circadian rhythm of GSTs in plants and could help in further defining detoxification processes.
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Affiliation(s)
- Ágnes Gallé
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Zalán Czékus
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Krisztina Bela
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Edit Horváth
- Institute of Plant Biology, Biological Research Centre, H-6726 Szeged, Hungary
| | - Jolán Csiszár
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Péter Poór
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
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13
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Horváth E, Hernádi HJ, Szabó A, Lukács A, Molnár R, Paulik E. Willingness towards health behavior change and wellbeing among high school students in Hungary. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky214.136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- E Horváth
- Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - HJ Hernádi
- Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - A Szabó
- Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - A Lukács
- Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - R Molnár
- Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - E Paulik
- Faculty of Medicine, University of Szeged, Szeged, Hungary
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14
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Paulik E, Horváth E, Molnár A, Orvos H, Balázs P, Grenczer A. Retrospective study of risk factors for postnatal depression symptoms in Hungary. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky212.361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- E Paulik
- Department of Public Health, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - E Horváth
- Department of Public Health, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - A Molnár
- Department of Public Health, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - H Orvos
- Department of Obstetrics and Gynaecology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - P Balázs
- Department of Public Health, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - A Grenczer
- Department of Family Care Methodology, Faculty of Health Sciences, Semmelweis University, Budapest, Hungary
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15
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M.Török, Monori-Kiss A, Pál É, Horváth E, Jósvai A, Merkely P, Sayour A, Mátyás C, Oláh A, Radovits T, Merkely B, Ács N, Nádasy G, Várbíró S. INFLUENCE OF GENDER ON THE ADAPTATION OF CORONARY ARTERIOLES IN SPORT. J Hypertens 2018. [DOI: 10.1097/01.hjh.0000539735.03364.c9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Benyó D, Horváth E, Németh E, Leviczky T, Takács K, Lehotai N, Feigl G, Kolbert Z, Ördög A, Gallé R, Csiszár J, Szabados L, Erdei L, Gallé Á. Physiological and molecular responses to heavy metal stresses suggest different detoxification mechanism of Populus deltoides and P. x canadensis. J Plant Physiol 2016; 201:62-70. [PMID: 27448721 DOI: 10.1016/j.jplph.2016.05.025] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 05/23/2016] [Accepted: 05/25/2016] [Indexed: 05/28/2023]
Abstract
Plants have divergent defense mechanisms against the harmful effects of heavy metals present in excess in soils and groundwaters. Poplars (Populus spp.) are widely cultivated because of their rapid growth and high biomass production, and members of the genus are increasingly used as experimental model organisms of trees and for phytoremediation purposes. Our aim was to investigate the copper and zinc stress responses of three outstanding biomass producer bred poplar lines to identify such transcripts of genes involved in the detoxification mechanisms, which can play an important role in the protection against heavy metals. Poplar cuttings were grown hydroponically and subjected to short-term (one week) mild and sublethal copper and zinc stresses. We evaluated the effects of the applied heavy metals and the responses of plants by detecting the changes of multiple physiological and biochemical parameters. The most severe cellular oxidative damage was caused by 30μM copper treatment, while zinc was less harmful. Analysis of stress-related transcripts revealed genotype-specific differences that are likely related to alterations in heavy metal tolerance. P. deltoides clones B-229 and PE 19/66 clones were clearly more effective at inducing the expression of various genes implicated in the detoxification process, such as the glutathione transferases, metallothioneins, ABC transporters, (namely PtGSTU51, PxMT1, PdABCC2,3), while the P. canadensis line M-1 accumulated more metal, resulting in greater cellular oxidative damage. Our results show that all three poplar clones are efficient in stress acclimatization, but with different molecular bases.
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Affiliation(s)
- Dániel Benyó
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary.
| | - Edit Horváth
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Edit Németh
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Tünde Leviczky
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Kinga Takács
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Nóra Lehotai
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Gábor Feigl
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Zsuzsanna Kolbert
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Attila Ördög
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Róbert Gallé
- Department of Ecology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Jolán Csiszár
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - László Szabados
- Laboratory of Arabidopsis Molecular Genetics, Biological Research Centre, Temesvári körút 62, H-6726 Szeged, Hungary
| | - László Erdei
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Ágnes Gallé
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
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17
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Spina M, Náfrádi B, Tóháti HM, Kamarás K, Bonvin E, Gaal R, Forró L, Horváth E. Ultrasensitive 1D field-effect phototransistors: CH3NH3PbI3 nanowire sensitized individual carbon nanotubes. Nanoscale 2016; 8:4888-4893. [PMID: 26864708 DOI: 10.1039/c5nr06727h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Field-effect phototransistors were fabricated based on individual carbon nanotubes (CNTs) sensitized by CH3NH3PbI3 nanowires (MAPbI3NWs). These devices represent light responsivities of R = 7.7 × 10(5) A W(-1) under low-lighting conditions in the nW mm(-2) range, unprecedented among CNT-based photodetectors. At high incident power (∼1 mW mm(-2)), light soaking results in a negative photocurrent, turning the device insulating. We interpret the phenomenon as a result of efficient free photoexcited charge generation and charge transfer of photoexcited holes from the perovskite to the carbon nanotube. The charge transfer improves conductance by increasing the number of carriers, but leaves electrons behind. At high illumination intensity their random electrostatic potential quenches mobility in the nanotube.
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Affiliation(s)
- M Spina
- Laboratory of Physics of Complex Matter (LPMC), Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
| | - B Náfrádi
- Laboratory of Physics of Complex Matter (LPMC), Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
| | - H M Tóháti
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, 1525 Budapest, Hungary
| | - K Kamarás
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, 1525 Budapest, Hungary
| | - E Bonvin
- Laboratory of Physics of Complex Matter (LPMC), Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
| | - R Gaal
- Laboratory of Physics of Complex Matter (LPMC), Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
| | - L Forró
- Laboratory of Physics of Complex Matter (LPMC), Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
| | - E Horváth
- Laboratory of Physics of Complex Matter (LPMC), Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
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18
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Horváth E, Bela K, Papdi C, Gallé Á, Szabados L, Tari I, Csiszár J. The role of Arabidopsis glutathione transferase F9 gene under oxidative stress in seedlings. Acta Biol Hung 2015; 66:406-18. [PMID: 26616373 DOI: 10.1556/018.66.2015.4.5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Arabidopsis thaliana contains 54 soluble glutathione transferases (GSTs, EC 2.5.1.18), which are thought to play major roles in oxidative stress responses, but little is known about the function of individual isoenzymes. The role of AtGST phi 9 (GSTF9) in the salt- and salicylic acid response was investigated using 2-week-old Atgstf9 and wild type (Wt) plants. Atgstf9 mutants accumulated more ascorbic acid (AsA) and glutathione (GSH) and had decreased glutathione peroxidase (GPOX) activity under control conditions. Treatment of 2-week-old seedlings with 10⁻⁷ M salicylic acid (SA) for 48 h resulted in elevated H₂O₂level and enhanced GST activity in Atgstf9 plants, 10⁻⁵ M SA treatment enhanced the malondialdehyde and dehydroascorbate contents compared to Wt. 50 and 150 mM NaCl increased the GST activity, AsA and GSH accumulation in Atgstf9 seedlings more pronounced than in Wt plants. We found that the Atgstf9 mutants had altered redox homeostasis under control and stress conditions, in which elevated AsA and GSH levels and modified GST and GPOX activities may play significant role. The half-cell potential values calculated from the concentration of GSH and GSSG indicate that this GST isoenzyme has an important role in the salt stress response.
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Affiliation(s)
- Edit Horváth
- Department of Plant Biology, Faculty of Sciences, University of Szeged , Közép fasor 52, H-6726 Szeged , Hungary
| | - Krisztina Bela
- Department of Plant Biology, Faculty of Sciences, University of Szeged , Közép fasor 52, H-6726 Szeged , Hungary
| | - Csaba Papdi
- Institute of Plant Biology, Biological Research Centre of HAS , Temesvári krt. 62, H-6726 Szeged , Hungary
| | - Ágnes Gallé
- Department of Plant Biology, Faculty of Sciences, University of Szeged , Közép fasor 52, H-6726 Szeged , Hungary
| | - László Szabados
- Institute of Plant Biology, Biological Research Centre of HAS , Temesvári krt. 62, H-6726 Szeged , Hungary
| | - Irma Tari
- Department of Plant Biology, Faculty of Sciences, University of Szeged , Közép fasor 52, H-6726 Szeged , Hungary
| | - Jolán Csiszár
- Department of Plant Biology, Faculty of Sciences, University of Szeged , Közép fasor 52, H-6726 Szeged , Hungary
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19
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Horváth E, Brunner S, Bela K, Papdi C, Szabados L, Tari I, Csiszár J. Exogenous salicylic acid-triggered changes in the glutathione transferases and peroxidases are key factors in the successful salt stress acclimation of Arabidopsis thaliana. Funct Plant Biol 2015; 42:1129-1140. [PMID: 32480751 DOI: 10.1071/fp15119] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 09/10/2015] [Indexed: 05/27/2023]
Abstract
Salicylic acid (SA) applied exogenously is a potential priming agent during abiotic stress. In our experiments, the priming effect of SA was tested by exposing Arabidopsis thaliana (L.) Heynh. plants to 2-week-long 10-9-10-5 M SA pretreatments in a hydroponic medium, followed by 1 week of 100mM NaCl stress. The levels of reactive oxygen species and H2O2, changes in antioxidant enzyme activity and the expression of selected glutathione transferase (GST) genes were investigated. Although 10-9-10-7 M SA pretreatment insufficiently induced defence mechanisms during the subsequent salt stress, 2-week pretreatments with 10-6 and 10-5 M SA alleviated the salinity-induced H2O2 and malondialdehyde accumulation, and increased superoxide dismutase, guaiacol peroxidase, GST and glutathione peroxidase (GPOX) activity. Our results indicate that long-term 10-6 and 10-5 M SA treatment mitigated the salt stress injury in this model plant. Enhanced expression of AtGSTU19 and AtGSTU24 may be responsible for the induced GST and GPOX activity, which may play an important role in acclimation. Modified GST expression suggested altered signalling in SA-hardened plants during salt stress. The hydroponic system applied in our experiments proved to be a useful tool for studying the effects of sequential treatments in A. thaliana.
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Affiliation(s)
- Edit Horváth
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, 6726 Szeged, Hungary
| | - Szilvia Brunner
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, 6726 Szeged, Hungary
| | - Krisztina Bela
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, 6726 Szeged, Hungary
| | - Csaba Papdi
- Institute of Plant Biology, Biological Research Centre, Hungarian Academy of Sciences, Temesvári körút 62, 6726 Szeged, Hungary
| | - László Szabados
- Institute of Plant Biology, Biological Research Centre, Hungarian Academy of Sciences, Temesvári körút 62, 6726 Szeged, Hungary
| | - Irma Tari
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, 6726 Szeged, Hungary
| | - Jolán Csiszár
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, 6726 Szeged, Hungary
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20
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Horváth E, Csiszár J, Gallé Á, Poór P, Szepesi Á, Tari I. Hardening with salicylic acid induces concentration-dependent changes in abscisic acid biosynthesis of tomato under salt stress. J Plant Physiol 2015; 183:54-63. [PMID: 26086888 DOI: 10.1016/j.jplph.2015.05.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 05/19/2015] [Accepted: 05/23/2015] [Indexed: 05/08/2023]
Abstract
The role of salicylic acid (SA) in the control of abscisic acid (ABA) biosynthesis is controversial although both plant growth regulators may accumulate in tissues under abiotic and biotic stress conditions. Hardening of tomato plants to salinity stress with 10(-4)M SA ("high SA") resulted in an up-regulation of ABA biosynthesis genes, zeaxanthin epoxidase (SlZEP1), 9-cis-epoxycarotenoid dioxygenase (SlNCED1) and aldehyde oxidases (SlAO1 and SlAO2) in the roots and led to ABA accumulation both in root and leaf tissues. In plants pre-treated with lower concentration of SA (10(-7)M, "low SA"), the up-regulation of SlNCED1 in the roots promoted ABA accumulation in the root tissues but the hormone concentration remained at control level in the leaves. Salt stress induced by 100mM NaCl reduced the transcript abundance of ABA biosynthetic genes and inhibited SlAO activity in plants hardened with "high SA", but the tissues maintained root ABA level over the untreated control. The combined effect of "high SA" and ABA under salt stress led to partially recovered photosynthetic activity, reduced ethylene production in root apices, and restored root growth, which is one of the main features of salt tolerance. Unlike "high SA", hardening with "low SA" had no influence on ethylene production, and led to reduced elongation of roots in plants exposed to 100mM NaCl. The up-regulation of carotenoid cleavage dioxygenases SlCCD1A and SlCCD1B by SA, which produce apocarotenoids, may open new pathways in SA sensing and signalling processes.
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Affiliation(s)
- Edit Horváth
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary.
| | - Jolán Csiszár
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Ágnes Gallé
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Péter Poór
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Ágnes Szepesi
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Irma Tari
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary.
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Tari I, Csiszár J, Horváth E, Poór P, Takács Z, Szepesi Á. The Alleviation of the Adverse Effects of Salt Stress in the Tomato Plant by Salicylic Acid Shows A Time- and Organ-Specific Antioxidant Response. ACTA ACUST UNITED AC 2015. [DOI: 10.1515/abcsb-2015-0008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In the last decade contradictory results have been published as to whether exogenous salicylic acid (SA) can increase salt stress tolerance in cultivated plants by inducing an antioxidant response. Salt stress injury in tomato was mitigated only in cases when the plant was hardened with a high concentration of SA (~10−4 M), low concentrations were ineffective. An efficient accumulation of Na+ in older leaves is a well-known response to salt stress in tomato plants (Solanum lycopersicum cv. Rio fuego) but it remains largely unexplored whether young and old leaves or root tissues have a distinct antioxidant status during salt stress after hardening with 10−7 M or 10−4 M SA. The determination of superoxide dismutase (SOD) and catalase (CAT) activity revealed that the SA-induced transient increases in these enzyme activities in young leaf and/or root tissues did not correlate with the salt tolerance of plants. Salt stress resulted in a tenfold increase in ascorbate peroxidase (APX) activities of young leaves and significant increases in APX and glutathione reductase (GR) activities of the roots hardened with 10−4 M SA. Both total ascorbate (AsA) and glutathione pools reached their highest levels in leaves after 10−7 M SA pre-treatment. However, in contrast to the leaves, the total pool of AsA decreased in the roots under salt stress and thus, due to low APX activity, active oxygen species were scavenged by ascorbate non-enzymatically in these tissues. The increased GR activities in the roots after treatment with 10−4 M SA enabled plants to enhance the reduced glutathione (GSH) pool and maintain the redox status of AsA under high salinity, which led to increased salt tolerance.
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Bela K, Horváth E, Gallé Á, Szabados L, Tari I, Csiszár J. Plant glutathione peroxidases: emerging role of the antioxidant enzymes in plant development and stress responses. J Plant Physiol 2015; 176:192-201. [PMID: 25638402 DOI: 10.1016/j.jplph.2014.12.014] [Citation(s) in RCA: 179] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 12/15/2014] [Accepted: 12/15/2014] [Indexed: 05/18/2023]
Abstract
The plant glutathione peroxidase (GPX) family consists of multiple isoenzymes with distinct subcellular locations which exhibit different tissue-specific expression patterns and environmental stress responses. Contrary to most of their counterparts in animal cells, plant GPXs contain cysteine instead of selenocysteine in their active site and while some of them have both glutathione peroxidase and thioredoxin peroxidase functions, the thioredoxin regenerating system is much more efficient in vitro than the glutathione system. At present, the function of these enzymes in plants is not completely understood. The occurrence of thiol-dependent activities of plant GPX isoenzymes suggests that - besides detoxification of H2O2 and organic hydroperoxides - they may be involved in regulation of the cellular redox homeostasis by maintaining the thiol/disulfide or NADPH/NADP(+) balance. GPXs may represent a link existing between the glutathione- and the thioredoxin-based system. The various thiol buffers, including Trx, can affect a number of redox reactions in the cells most probably via modulation of thiol status. It is still required to identify the in vivo reductant for particular GPX isoenzymes and partners that GPXs interact with specifically. Recent evidence suggests that plant GPXs does not only protect cells from stress induced oxidative damage but they can be implicated in plant growth and development. Following a more general introduction, this study summarizes present knowledge on plant GPXs, highlighting the results on gene expression analysis, regulation and signaling of Arabidopsis thaliana GPXs and also suggests some perspectives for future research.
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Affiliation(s)
- Krisztina Bela
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary
| | - Edit Horváth
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary
| | - Ágnes Gallé
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary
| | - László Szabados
- Institute of Plant Biology, Biological Research Centre of HAS, Temesvári krt. 62., H-6726 Szeged, Hungary
| | - Irma Tari
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary
| | - Jolán Csiszár
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., H-6726 Szeged, Hungary.
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Csiszár J, Horváth E, Váry Z, Gallé Á, Bela K, Brunner S, Tari I. Glutathione transferase supergene family in tomato: Salt stress-regulated expression of representative genes from distinct GST classes in plants primed with salicylic acid. Plant Physiol Biochem 2014; 78:15-26. [PMID: 24607575 DOI: 10.1016/j.plaphy.2014.02.010] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Accepted: 02/10/2014] [Indexed: 05/24/2023]
Abstract
A family tree of the multifunctional proteins, glutathione transferases (GSTs, EC 2.5.1.18) was created in Solanum lycopersicum based on homology to known Arabidopsis GSTs. The involvement of selected SlGSTs was studied in salt stress response of tomato primed with salicylic acid (SA) or in un-primed plants by real-time qPCR. Selected tau GSTs (SlGSTU23, SlGSTU26) were up-regulated in the leaves, while GSTs from lambda, theta, dehydroascorbate reductase and zeta classes (SlGSTL3, SlGSTT2, SlDHAR5, SlGSTZ2) in the root tissues under salt stress. Priming with SA exhibited a concentration dependency; SA mitigated the salt stress injury and caused characteristic changes in the expression pattern of SlGSTs only at 10(-4) M concentration. SlGSTF4 displayed a significant up-regulation in the leaves, while the abundance of SlGSTL3, SlGSTT2 and SlGSTZ2 transcripts were enhanced in the roots of plants primed with high SA concentration. Unexpectedly, under high salinity the SlDHAR2 expression decreased in primed roots as compared to the salt-stressed plants, however, the up-regulation of SlDHAR5 isoenzyme contributed to the maintenance of DHAR activity in roots primed with high SA. The members of lambda, theta and zeta class GSTs have a specific role in salt stress acclimation of tomato, while SlGSTU26 and SlGSTF4, the enzymes with high glutathione conjugating activity, characterize a successful priming in both roots and leaves. In contrast to low concentration, high SA concentration induced those GSTs in primed roots, which were up-regulated under salt stress. Our data indicate that induction of GSTs provide a flexible tool in maintaining redox homeostasis during unfavourable conditions.
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Affiliation(s)
- Jolán Csiszár
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary.
| | - Edit Horváth
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Zsolt Váry
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Ágnes Gallé
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Krisztina Bela
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Szilvia Brunner
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
| | - Irma Tari
- Department of Plant Biology, Faculty of Sciences, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary
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Horváth E, Szabó R. WEED SURVEYING OF PHACELIA (PHACELIA TANACETIFOLIA L.) AND EVALUATING THE EFFICIENCY OF THE WEED CONTROL. Commun Agric Appl Biol Sci 2014; 79:99-103. [PMID: 26084087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The experiment was set up in an area of 9 ha that was split into 4 plots: in plot 1 the row spacing was 12 cm and the seeding rate was 10 kg; in plot 2 the row spacing was 24 cm and the seeding rate was 10 kg; in plot 3 the row spacing was 24 cm and the seeding rate was 8 kg; in plot 4 the row spacing was 12 cm and the seeding rate was 8 kg. After the weed surveying, the total weed coverage was established as follows: in plot 1 the total weed coverage was 11.34%, in plot 2 it was 12.3%, in plot 3 it was 18%, and in plot 4 the total weed coverage was 15%. Based on the weed survey, on the test area the following dicotyledon weeds belonging to the T4 Raunkiaer plant life-form category occupied the highest percentage: heal-all, black-bindweed, goosefoot. The proportion of the perennial dicotyledons: field bindweed (G3), tuberous pea (G1), white campion (H3) was negligible. In all four cases the weed control was executed using the same herbicide in the same doses and with regard to the weed species it showed the same level of efficiency. The smaller row spacing and higher seeding rate has a beneficial effect on the weed suppressing capacity of the crop, the crop's weed suppressing capacity is better and the development of the weeds becomes worse.
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Kristóf J, Horváth E, Daolio S. Study of Metal Oxide Electrocatalytic Thin Film Evolution by Thermoanalytical and Spectroscopic Techniques—a Review. Electrocatalysis (N Y) 2013. [DOI: 10.1007/s12678-013-0147-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Horváth E, Sipos P, Marczali Z. Gall midges and their parasitoids on common reed in Kis-Balaton area, Hungary. Commun Agric Appl Biol Sci 2013; 78:327-331. [PMID: 25145254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
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Csiszár J, Gallé A, Horváth E, Dancsó P, Gombos M, Váry Z, Erdei L, Györgyey J, Tari I. Different peroxidase activities and expression of abiotic stress-related peroxidases in apical root segments of wheat genotypes with different drought stress tolerance under osmotic stress. Plant Physiol Biochem 2012; 52:119-29. [PMID: 22305075 DOI: 10.1016/j.plaphy.2011.12.006] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Accepted: 12/16/2011] [Indexed: 05/19/2023]
Abstract
One-week-old seedlings of Triticum aestivum L. cv. Plainsman V, a drought tolerant; and Cappelle Desprez, a drought sensitive wheat cultivar were subjected gradually to osmotic stress using polyethylene glycol (PEG 6000) reaching 400 mOsm on the 11th day. Compared to controls cv. Plainsman V maintained the root growth and relative water content of root tissues, while these parameters were decreased in the drought sensitive cv. Cappelle Desprez under PEG-mediated osmotic stress. Simultaneously, H(2)O(2) content in 1-cm-long apical segment of roots comprising the proliferation and elongation zone, showed a transient increase in cv. Plainsman V and a permanent raise in cv. Cappelle Desprez. Measurements of the transcript levels of selected class III peroxidase (TaPrx) coding sequences revealed significant differences between the two cultivars on the 9th day, two days after applying 100 mOsm PEG. The abundance of TaPrx04 transcript was enhanced transitionally in the root apex of cv. Plainsman V but decreased in cv. Cappelle Desprez under osmotic stress while the expression of TaPrx01, TaPrx03, TaPrx19, TaPrx68, TaPrx107 and TaPrx109-C decreased to different extents in both cultivars. After a transient decrease, activities of soluble peroxidase fractions of crude protein extracts rose in both cultivars on day 11, but the activities of cell wall-bound fractions increased only in cv. Cappelle Desprez under osmotic stress. Parallel with high H(2)O(2) content of the tissues, certain isoenzymes of covalently bound fraction in cv. Cappelle Desprez showed increased activity suggesting that they may limit the extension of root cell walls in this cultivar.
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Affiliation(s)
- Jolán Csiszár
- Department of Plant Biology, Faculty of Science, University of Szeged, P.O. Box 654, H-6701 Szeged, Hungary.
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Horváth E, Papp G, Gazdag Z, Belágyi J, Blaskó A, Deli J, Vágvölgyi C, Pesti M. Characterization of stress processes of Phaffia rhodozyma stress-resistant mutant. Acta Biol Hung 2011; 62:204-10. [PMID: 21555272 DOI: 10.1556/abiol.62.2011.2.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A carotenoid-less Phaffia rhodozyma mutant (MCP 325) exhibited significantly higher resistance to oxidative stressors such as menadione, H2O2 and K2Cr2O7 than its astaxanthin-producing parental strain (MCP 324). The absence of carotenoids in the mutant did not explain this phenomenon. The cause of the decreased superoxide, hydroxyl radical and glutathione contents, the increased peroxide concentration and the elevated specific activity of catalase under uninduced conditions may be a second mutation. Peroxide treatment induced specific catalase activity in the mutant but not in the parental strain. Regulation of these processes led to the result that, in spite of the mutations, the two strains exhibited the same multiplication rate and generation time.
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Affiliation(s)
- E Horváth
- Department of General and Environmental Microbiology, University of Pécs, Pécs, Hungary
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Gémes K, Poór P, Horváth E, Kolbert Z, Szopkó D, Szepesi A, Tari I. Cross-talk between salicylic acid and NaCl-generated reactive oxygen species and nitric oxide in tomato during acclimation to high salinity. Physiol Plant 2011; 142:179-92. [PMID: 21338371 DOI: 10.1111/j.1399-3054.2011.01461.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Hydrogen peroxide (H₂O₂) and nitric oxide (NO) generated by salicylic acid (SA) are considered to be functional links of cross-tolerance to various stressors. SA-stimulated pre-adaptation state was beneficial in the acclimation to subsequent salt stress in tomato (Solanum lycopersicum cv. Rio Fuego). At the whole-plant level, SA-induced massive H₂O₂ accumulation only at high concentrations (10⁻³-10⁻² M), which later caused the death of plants. The excess accumulation of H₂O₂ as compared with plants exposed to 100 mM NaCl was not associated with salt stress response after SA pre-treatments. In the root tips, 10⁻³-10⁻² M SA triggered the production of reactive oxygen species (ROS) and NO with a concomitant decline in the cell viability. Sublethal concentrations of SA, however, decreased the effect of salt stress on ROS and NO production in the root apex. The attenuation of oxidative stress because of high salinity occurred not only in pre-adapted plants but also at cell level. When protoplasts prepared from control leaves were exposed to SA in the presence of 100 mM NaCl, the production of NO and ROS was much lower and the viability of the cells was higher than in salt-treated samples. This suggests that, the cross-talk of signalling pathways induced by SA and high salinity may occur at the level of ROS and NO production. Abscisic acid (ABA), polyamines and 1-aminocyclopropane-1-carboxylic acid, the compounds accumulating in pre-treated plants, enhanced the diphenylene iodonium-sensitive ROS and NO levels, but, in contrast to others, ABA and putrescine preserved the viability of protoplasts.
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Affiliation(s)
- Katalin Gémes
- Department of Plant Biology, University of Szeged, PO Box 654, H-6701 Szeged, Hungary
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Kertész Z, Bălă G, Bancu S, Gozar H, Virgil G, Horváth E, Pávai Z. [Bleomycin therapy for lymphangioma]. Chirurgia (Bucur) 2011; 106:103-107. [PMID: 21523964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Lymphangiomas are uncommun congenital malformations of the lymphatic system, that involve the skin and subcutaneous tissues. Of the several types of treatment, surgical excision has been the preferred. There is a high recurrence rate because lymphangiomas tend to infiltrate the surrounding tissues. The bleomycin is a cytotoxic antitumoral antibiotic, that causes modifications of DNA. It has been also successfully used in intralesional injection treatment of cystic hygromas and haemangiomas, based specifically on a high sclerosing effect on vascular endothelium. We report the cases of five patients, with congenital lymphangioma, localized on the leg, in cervical and latero-thoracal region, treated with repeated intralesional bleomycin injections. The treatment indication was given by the location of this lesions and the infiltration of the surrounding vital tissues, that made the complete surgical excision impossible. Intralesional injection of bleomycin into the lymphangiomas was given at a dose, not exceeding 0,5 mg/kg of body weight, at intervals of 4 weeks. Complete resolution (n = 4) or significant improvement (n = 1) occurred in all patients treated. No other treatment was needed. We didn't notice local or general adverse effects. With this method we set the purpose to treat effectively this congenital malformations, obviating the need for invasive primary surgery or systemic treatment regimens. Toward other methods, intralesional bleomycin injections have a minimal risk of side effects (ulceration, pulmonary fibrosis).
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Affiliation(s)
- Zs Kertész
- Chirurgie Pediatrică, U.M.F Târgu-Mureş, Romania.
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Sikovanyecz J, Horváth E, Pásztor N, Keresztúri A, Szabó J, Pál A. Fetomaternal transfusion after amniocentesis and cordocentesis. Ir J Med Sci 2010; 180:697-701. [DOI: 10.1007/s11845-010-0663-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2007] [Accepted: 12/08/2010] [Indexed: 11/24/2022]
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Biró LP, Kertész K, Horváth E, Márk GI, Molnár G, Vértesy Z, Tsai JF, Kun A, Bálint Z, Vigneron JP. Bioinspired artificial photonic nanoarchitecture using the elytron of the beetle Trigonophorus rothschildi varians as a 'blueprint'. J R Soc Interface 2009; 7:887-94. [PMID: 19933221 DOI: 10.1098/rsif.2009.0438] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
An unusual, intercalated photonic nanoarchitecture was discovered in the elytra of Taiwanese Trigonophorus rothschildi varians beetles. It consists of a multilayer structure intercalated with a random distribution of cylindrical holes normal to the plane of the multilayer. The nanoarchitectures were characterized structurally by scanning electron microscopy and optically by normal incidence, integrated and goniometric reflectance measurements. They exhibit an unsaturated specular and saturated non-specular component of the reflected light. Bioinspired, artificial nanoarchitectures of similar structure and with similar properties were realized by drilling holes of submicron size in a multilayer structure, showing that such photonic nanoarchitectures of biological origin may constitute valuable blueprints for artificial photonic materials.
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Affiliation(s)
- L P Biró
- Research Institute for Technical Physics and Materials Science, PO Box 49, H-1525 Budapest, Hungary.
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Szepesi A, Csiszár J, Gémes K, Horváth E, Horváth F, Simon ML, Tari I. Salicylic acid improves acclimation to salt stress by stimulating abscisic aldehyde oxidase activity and abscisic acid accumulation, and increases Na+ content in leaves without toxicity symptoms in Solanum lycopersicum L. J Plant Physiol 2009; 166:914-25. [PMID: 19185387 DOI: 10.1016/j.jplph.2008.11.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2008] [Revised: 11/21/2008] [Accepted: 11/23/2008] [Indexed: 05/02/2023]
Abstract
Pre-treatment with 10(-4)M salicylic acid (SA) in hydroponic culture medium provided protection against salinity stress in tomato plants (Solanum lycopersicum L. cv. Rio Fuego). The effect of 10(-7) or 10(-4)M SA on the water status of plants was examined in relation to the biosynthesis and accumulation of abscisic acid (ABA) in order to reveal the role of SA in the subsequent response to salt stress. Both pre-treatments inhibited the K+(86Rb+) uptake of plants, reduced the K+ content of leaves, and caused a decrease in leaf water potential (psi(w)). Due to the changes in the cellular water status, SA triggered the accumulation of ABA. Since the decrease in psi(w) proved to be transient, the effect of SA on ABA synthesis may also develop via other mechanisms. In spite of osmotic adaptation, the application of 10(-4)M, but not 10(-7)M SA, led to prolonged ABA accumulation and to enhanced activity of aldehyde oxidase (AO1, EC.1.2.3.1.), an enzyme responsible for the conversion of ABA-aldehyde to ABA, both in root and leaf tissues. AO2-AO4 isoforms from the root extracts also exhibited increased activities. The fact that the activities of AO are significantly enhanced both in the leaves and roots of plants exposed to 10(-4)M SA, may indicate a positive feedback regulation of ABA synthesis by ABA in this system. Moreover, during a 100mM NaCl treatment, higher levels of free putrescine or spermine were found in these leaves or roots, respectively, than in the salt-stressed controls, suggesting that polyamines may be implicated in the protection response of the cells. As a result, Na+ could be transported to the leaf mesophyll cells without known symptoms of salt toxicity.
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Affiliation(s)
- Agnes Szepesi
- Department of Plant Biology, University of Szeged, H-6701 Szeged, Középfasor 52, P.O. Box 654, Hungary
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Abstract
S-methylmethionine (SMM), a naturally occurring, biologically active compound, is a free amino acid derivative, which is increasingly recognised as playing an important part in the plant metabolism. SMM, which is synthesised from methionine, is involved in crucial processes in the S metabolism, such as the regulation of methionine and S-adenosyl methionine levels, the methylation processes taking place in cells, and the transport and storage of sulphur in certain phases of development. It is of great importance in the development of resistance to abiotic and biotic stress factors, as it is a direct precursor in the biosynthesis of the osmoprotectants and other S-containing compounds involved in defence mechanisms, while also influencing the biosynthesis of major plant hormones such as polyamines and ethylene. The present paper discusses our increasing understanding of the role played by SMM in the plant metabolism and its possible role in the improvement of traits that enable plants to overcome stress.
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Affiliation(s)
- D. Szegő
- 1 Eötvös Loránd University Department of Plant Physiology Budapest Hungary
| | - E. Kósa
- 2 Pannon University Department of Botany and Plant Physiology, Georgikon Faculty Keszthely Hungary
| | - E. Horváth
- 3 Agricultural Research Institute of the Hungarian Academy of Sciences Martonvásár Hungary
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Czifra G, Mészáros J, Horváth E, Moving V, Engström BE. Detection of NDV‐specific antibodies and the level of protection provided by a single vaccination in young chickens. Avian Pathol 2007; 27:562-5. [DOI: 10.1080/03079459808419384] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Bodorkós I, Aleksza M, Horváth E, Dancza T, Farkas A, Gy¨ork¨os A, Kovács M, Tiboly M, Tóth P, Gasztonyi B. P099 Haemotherapy and its serological aspects of patients suffering from immunohaematological diseases. Blood Rev 2007. [DOI: 10.1016/s0268-960x(07)70177-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Horváth E, Neumann PL, Tóth AL, Vázsonyi É, Koós AA, Horváth ZE, Fürjes P, Dücső C, Biró LP. Electrical Characterization of Tungsten Nanowires Deposited by Focused Ion Beam (FIB). ACTA ACUST UNITED AC 2006. [DOI: 10.1556/nano.1.2006.2.10] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Kiricsi I, Fudala Á, Méhn D, Kukovecz Á, Kónya Z, Hodos M, Horváth E, Urbán M, Kanyó T, Molnár É, Smajda R. Tubular inorganic nanostructures. Current Applied Physics 2006. [DOI: 10.1016/j.cap.2005.07.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Pávai Z, Füle T, Horváth E, Máthé M, Pap Z, Denes L, Jung J. Comparative detection of high-risk HPV (16, 18, 33) in cervical bioptic material of county hospital of Tg. Mures. Rom J Morphol Embryol 2006; 47:229-34. [PMID: 17308680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The purpose of this study was to collect data about the incidence of high-risk HPV (16, 18, 33) types in paraffin embedded cervical bioptic material, including LSIL, HSIL and cervical cancers using immunohistochemistry and nested PCR methods. In our study were included randomly selected 10 LSIL, 18 HSIL and 30 cervical cancer cases. We analyzed the expression of HPV in this specimens with immunohistochemistry used DAKO K1H8 antibody and CHEMICON Mab HPV 16, 16 antibody using LSAB method and Tiramin amplification method, and nested PCR for HPV 16, 18 and 33. In LSIL cases three, in HSIL cases eight and in carcinoma 20 cases were positive for HPV 16 or 18 for immunohistochemistry or PCR. Although this proportion in lower than those reported in the literature, our work signals the existence of the infection in our country and presents a relatively cheap diagnostic method.
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Affiliation(s)
- Z Pávai
- Department of Anatomy, University of Medicine and Pharmacy, Tg. Mureş, Romania.
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Szalai G, Pál M, Horváth E, Janda T, Páldi E. Investigations on the adaptability of maize lines and hybrids to low temperature and cadmium. ACTA ACUST UNITED AC 2005. [DOI: 10.1556/aagr.53.2005.2.7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In the course of the Maize Consortium Project, investigations were made on the defence mechanisms employed by maize against various abiotic stress factors (low temperature, cadmium) and on the effects exerted by two compounds (S-methylmethionine, salicylic acid) capable of improving the stress resistance of plants to certain abiotic stresses. Salicylic acid (SA) was found to inhibit the uptake of cadmium (Cd), but caused damage to the roots, including a reduction in the activity of phytochelatin synthase (PCS), which meant that preliminary treatment with SA aggravated the damaging effect of Cd. It was also proved that as the result of 2-day treatment with Cd, there was a continuous rise in the Cd level in the plants, more Cd being accumulated in young leaves than in older ones. The PCS activity increased greatly after 24 hours, both in the leaves and in the roots, declining again after 2 days. The effect of SA was examined in both the hybrids and their parental lines, and the effect of this compound on the intensity of alternative respiration was also investigated. A comparison of chilling tolerance data and antioxidant enzyme activity indicated that these two parameters were not directly correlated to each other, i.e. antioxidant enzyme activity values could not be used to draw reliable conclusions on the chilling tolerance of maize lines and hybrids. With regard to the interaction between alternative respiration and salicylic acid, it was proved that exogenous hydrogen peroxide caused a similar increase in the ratio of alternative respiration to that observed after salicylic acid treatment. Abbreviations: SA, salicylic acid; Cd, cadmium; PCS, phytochelatin synthase; SMM, S-methylmethionine; PCs, phytochelatins; PAR, photosynthetically active radiation; TTC, triphenyl tetrazolium chloride; KCN, potassium cyanide; PSII, 2nd photochemical system; POD, guaiacol peroxidase; APX, ascorbate peroxidase; GR, glutathione reductase
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Affiliation(s)
- G. Szalai
- 1 Agricultural Research Institute of the Hungarian Academy of Sciences Martonvásár, Hungary
| | - M. Pál
- 2 Agricultural Research Institute of the Hungarian Academy of Sciences Martonvásár, Hungary
| | - E. Horváth
- 3 Agricultural Research Institute of the Hungarian Academy of Sciences Martonvásár, Hungary
| | - T. Janda
- 4 Agricultural Research Institute of the Hungarian Academy of Sciences Martonvásár, Hungary
| | - E. Páldi
- 5 Agricultural Research Institute of the Hungarian Academy of Sciences Martonvásár, Hungary
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Dobos-Kovács M, Horváth E, Farsang A, Nagy E, Kovács A, Szalai F, Bernáth S. Haemorrhagic nephritis and enteritis of geese: pathomorphological investigations and proposed pathogenesis. Acta Vet Hung 2005; 53:213-23. [PMID: 15959979 DOI: 10.1556/avet.53.2005.2.6] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Haemorrhagic nephritis and enteritis of geese as a new disease was first described in Hungary in 1969. The authors identified the causative agent of the outbreaks occurring in 1969 as a polyomavirus by PCR in 2001. In order to study the pathogenesis of the virus, one-day-old goslings were infected with tissue homogenate that tested positive for polyomavirus by PCR. Morphological, light and transmission electron microscopic (TEM) examinations have revealed that goose haemorrhagic polyomavirus replicates in the endothelial cells of the blood vessels and capillaries of diseased birds. Infection causes damage and necrosis of the endothelial cells. The virus was not observed in the parenchymal cells. Oedema and haemorrhages found throughout the body may be due to the dysfunction or functional deficiency of endothelial cells damaged by the virus.
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Affiliation(s)
- M Dobos-Kovács
- Department of Pathology and Forensic Veterinary Medicine, Faculty of Veterinary Science, Szent István University, Budapest, Hungary
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Tory K, Horváth E, Süveges Z, Fekete A, Sallay P, Berta K, Szabó T, Szabó AJ, Tulassay T, Reusz GS. Effect of propranolol on heart rate variability in patients with end-stage renal disease: a double-blind, placebo-controlled, randomized crossover pilot trial. Clin Nephrol 2005; 61:316-23. [PMID: 15182126 DOI: 10.5414/cnp61316] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Low heart rate variability (HRV) is an independent risk factor of cardiac mortality in patients with end-stage renal disease (ESRD). It has been explained by uremic parasympathetic neuropathy. Sympathetic overactivity can also reduce HRV. Our aim was to determine whether there is vagal activity in ESRD patients that is masked by sympathetic activity. METHODS The effect of propranolol on HRV was examined in 13 patients with ESRD, aged 20.1 +/- 7.6 years without diabetes. All patients were given intravenous propranolol (0.05 mg/kg) once and placebo once in a randomized, double-blind way, with an interval of 6.6 days (mean, range: 2-9). Propranolol was administered before hemodialysis treatment, after 40 minutes supine resting period. HRV was registered for 10 minutes, during supine, before and after the injection. Patients' HRV data were compared to that of 29 age-matched healthy controls. RESULTS Initially, both high-(HFV) and low-frequency (LFV) bands of heart rate variability were lower in ESRD patients compared to controls (p < 0.001 for both). Propranolol resulted in a significant increase of HFV (propranolol: AlgHFV = 0.182 (0.027 - 0.337), placebo: deltalgHFV = -0.029 (-0.128 - +0.070); p = 0.032). Elevation of LFV was not significant. Six patients had an elevated plasma norepinephrine and/or epinephrine level. Plasma dopamine level was elevated in all but 1 patient (mean: 432 pmol/l, 95% CI: 320-543) and showed an inverse relationship with the increase of IgHFV secondary to propranolol (r = -0.66, p = 0.014). CONCLUSIONS Low HFV of ESRD patients can be improved by beta-adrenergic blockade. It demonstrates that there is some vagal activity in ESRD that is masked by sympathetic activity. Therefore, altered sympathovagal balance of ESRD patients should be taken into consideration in the assessment of vagal uremic neuropathy.
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Affiliation(s)
- K Tory
- First Department of Pediatrics, Semmelweis University of Budapest, Hungary.
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Fahrig T, Gerlach I, Horváth E. A synthetic derivative of the natural product rocaglaol is a potent inhibitor of cytokine-mediated signaling and shows neuroprotective activity in vitro and in animal models of Parkinson's disease and traumatic brain injury. Mol Pharmacol 2005; 67:1544-55. [PMID: 15716464 DOI: 10.1124/mol.104.008177] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Many acute and chronic neurodegenerative diseases are characterized by a localized inflammatory response and constitutive activation of the transcription factors nuclear factor-kappa B (NF-kappa B) and activator protein-1 (AP-1) as well as their upstream activating signaling cascades. Ample evidence indicates the implication of these processes in the pathogenesis of several diseases of the central nervous system. In this study, we show that a synthetic derivative of the natural product rocaglaol (compound A) displays potent anti-inflammatory properties in human endothelial and murine glial cells in vitro. Compound A inhibited cytokine- and lipopolysaccharide-induced release of various cytokines/chemokines and of nitric oxide as well as expression of the adhesion molecule endothelial leukocyte adhesion molecule-1 and the inducible enzymes nitric-oxide synthase and cyclooxygenase-2. As shown by immunocytochemistry and immunoblotting, compound A inhibited NF-kappa B and AP-1 activity in mixed glial cultures. Compound A exhibited neuroprotective activity in vitro and in vivo. 1-Methyl-4-phenylpyridinium-induced damage of mesencephalic dopaminergic neurons was significantly decreased, and long-term treatment of 1-methyl-4-phenyl-1,2,3,6,-tetrahydropyridine-injected mice with compound A significantly and dose-dependently reduced dopaminergic neuronal cell death. In addition, shortterm application of compound A to rats suffering from traumatic brain injury induced by subdural hematoma resulted in a significant reduction of the cerebral infarct volume. These results suggest that by inhibiting NF-kappa B and AP-1 signaling, compound A is able to reduce tissue inflammation and neuronal cell death, resulting in significant neuroprotection in animal models of neurodegeneration.
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Affiliation(s)
- T Fahrig
- Pharma Research CNS, Bayer Healthcare AG, Germany.
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Sikovanyecz J, Horváth E, Wayda K, Gellén J, Pál A, Szabó J. Increased nuchal translucency and decreased fetomaternal transfusion after chorionic villus sampling. Ultrasound Obstet Gynecol 2003; 21:455-458. [PMID: 12768556 DOI: 10.1002/uog.117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
OBJECTIVE To investigate the relationship between nuchal translucency (NT) and fetomaternal transfusion (FMT) after chorionic villus sampling (CVS). METHODS The level of FMT was determined in 272 viable, singleton pregnancies in which 10-14-week ultrasound scanning, NT measurement and CVS for fetal karyotyping had been performed. The pre-CVS NT was measured transvaginally, and the women were divided into two groups, i.e. those with NT < 2.5 mm (Group 1) or >or= 2.5 mm (Group 2). The level of FMT was determined via the maternal serum alpha-fetoprotein levels before and after CVS. FMT was analyzed in relation to the pre-CVS NT. RESULTS Of the 272 pregnancies, 213 were in Group 1 and 59 in Group 2. The mean levels of FMT after CVS were 23.3 +/- 12.2 and 5.4 +/- 2.9 micro L in Groups 1 and 2, respectively (P < 0.01). An FMT > 100 micro L was found in 19 cases in Group 1, whereas the maximum in Group 2 was 67.2 micro L. Aneuploidies were diagnosed in 17 cases, 15 (88.2%) of them in Group 2. When the pregnancies with adverse outcome were excluded from the two groups, a higher level of FMT was observed in Subgroup 1 than in Subgroup 2 (P < 0.01). CONCLUSIONS The mean level of FMT after CVS was significantly lower in pregnancies with an increased pre-CVS NT, a relationship observed in euploid pregnancies also. An increased pre-CVS NT seems to be inversely correlated with the FMT increase after CVS. Further studies are planned to investigate the background to this phenomenon.
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Affiliation(s)
- J Sikovanyecz
- Department of Obstetrics and Gynaecology, University of Szeged Faculty of Medicine, Albert Szent-Györgyi Medical and Pharmaceutical Centre, Szeged, Hungary
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Sárközy G, Semjén G, Laczay P, Horváth E, Schmidt J. Pulse and continuous oral norfloxacin treatment of experimentally induced Escherichia coli infection in broiler chicks and turkey poults. Acta Vet Hung 2002; 50:199-210. [PMID: 12113175 DOI: 10.1556/avet.50.2002.2.9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Experimental colibacillosis was produced in 40 healthy, 7-day-old broiler chickens and turkeys by intratracheal injection of 1 x 10(8) CFU/chick and 1.23 x 10(9) CFU/poult bacteria of an O1:F11 strain of Escherichia coli, respectively. Two days before E. coli challenge all chicks were vaccinated with a live attenuated strain of infectious bronchitis virus (H-52). This model of infection--at least in chicken--proved to be useful for evaluating the efficacy of antimicrobial medication, by recording mortality, body weight gain, pathological alterations and frequency of reisolation of E. coli. Using this model, the efficacy of two different dosing methods of norfloxacin (continuous and pulse dosing) was evaluated. The once-per-day pulse dosing of norfloxacin administered via the drinking water at 15 mg/kg body weight proved to be more efficacious than the continuous dosing method of 100 mg/L for 5 days in chickens, while there were no convincing differences between the two treatment regimens in turkeys. The results confirmed earlier observations on the pharmacokinetic properties of norfloxacin in chicks and turkeys (Laczay et al., 1998).
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Affiliation(s)
- G Sárközy
- Department of Pharmacology and Toxicology, Faculty of Veterinary Science, Szent István University, H-1075 Budapest, István u. 2, Hungary.
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Sarközy G, Semjén G, Laczay P, Horváth E. Treatment of experimentally induced Pasteurella multocida infections in broilers and turkeys: comparative studies of different oral treatment regimens. J Vet Med B Infect Dis Vet Public Health 2002; 49:130-4. [PMID: 12019943 DOI: 10.1046/j.1439-0450.2002.00518.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Experimental fowl cholera was induced in 60 healthy 10-week-old broiler chickens and 8-week-old turkeys by intramuscular inoculation with approximately 80 colony-forming units (cfu) of Pasteurella multocida X-73 strain and with approximately 70 cfu of P. multocida P-1059 strain, respectively. This method of infection proved to be useful for evaluating the efficacy of anti-microbial medication, by measuring mortality, weight gain, pathological responses and frequency of re-isolation of P. multocida. The efficacies of two different dosing methods, continuous and pulse dosing, were compared. Using the continuous-dosing method, norfloxacin was administered to drinking water at 100 mg/l for 5 days in chickens. Efficacies were slightly improved compared with pulse dosing at 15 mg/kg bodyweight for the same length of time. The opposite was observed in turkeys, to the degree of control of mortality and maintenance of weight gain.
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Affiliation(s)
- G Sarközy
- Department of Pharmacology and Toxicology, Faculty of Veterinary Science, Szent István University, Budapest, Hungary.
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Kline AE, Yu J, Horváth E, Marion DW, Dixon CE. The selective 5-HT(1A) receptor agonist repinotan HCl attenuates histopathology and spatial learning deficits following traumatic brain injury in rats. Neuroscience 2002; 106:547-55. [PMID: 11591455 DOI: 10.1016/s0306-4522(01)00300-1] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The selective 5-HT(1A) receptor agonist Repinotan HCl (BAY x3702) has been reported to attenuate cortical damage and improve functional performance in experimental models of cerebral ischemia and acute subdural hematoma. Using a clinically relevant contusion model of traumatic brain injury, we tested the hypothesis that a 4-h continuous infusion of Repinotan HCl (10 microg/kg/h i.v.) commencing 5 min post-injury would ameliorate functional outcome and attenuate histopathology. Forty isoflurane-anesthetized male adult rats were randomly assigned to receive either a controlled cortical impact (2.7 mm tissue deformation, 4 m/s) or sham injury (Injury/Vehicle=10, Injury/MK-801=10, Injury/Repinotan HCl=10, Sham/Vehicle=10), then tested for vestibulomotor function on post-operative days 1-5 and for spatial learning on days 14-18. Neither Repinotan HCl nor the non-competitive N-methyl-D-aspartate receptor antagonist MK-801, which served as a positive control, improved vestibulomotor function on beam balance and beam walk tasks relative to the Injury/Vehicle group, but both did significantly attenuate spatial learning and memory deficits on a water maze task. Repinotan HCl also reduced hippocampal CA(1) and CA(3) neuronal loss, as well as cortical tissue damage, compared to the Injury/Vehicle group at 4 weeks post-trauma. No significant difference in histological outcome was revealed between the Repinotan HCl- and MK-801-treated groups.These findings extend the therapeutic efficacy of Repinotan HCl to a contusion model of experimental brain injury and demonstrate for the first time that 5-HT(1A) receptor agonists confer neuroprotection and attenuate spatial learning deficits following controlled cortical impact injury. This treatment strategy may be beneficial in a clinical context where memory impairments are common following human traumatic brain injury.
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Affiliation(s)
- A E Kline
- Brain Tumor Research Center, Department of Neurosurgery, University of Pittsburgh, PA 15260, USA
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Wayda K, Keresztúri A, Orvos H, Horváth E, PAl A, Kovács L, Szabó J. Four years experience of first-trimester nuchal translucency screening for fetal aneuploidies with increasing regional availability. Acta Obstet Gynecol Scand 2001; 80:1104-9. [PMID: 11846706 DOI: 10.1034/j.1600-0412.2001.801205.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND A prospective screening study was carried out at the regional genetic and perinatal center in South Hungary in order to determine the efficiency of first-trimester nuchal translucency screening for fetal aneuploidies, following augmentation of the availability of nuchal translucency screening in the region by the inclusion of newly-trained hospital sonographers. METHODS Nuchal translucency thickness was measured by transvaginal sonography in 7,044 women with singleton or multiple pregnancies at weeks 10-12. Fetal karyotyping was performed when the nuchal translucency was . or = 2.5 mm, and in women with fetuses at high cytogenetic risk. RESULTS Follow-up was performed in 6,841 of the 7,044 screened women. An abnormal karyotype was found in 33 cases (0.48%). The level of increased nuchal translucency was 4.5% at a cutoff of > or = 2.5 mm, and 2.8% at a cutoff of > or = 3 mm. Seventeen cases of trisomy 21, eight of trisomy 18, four of trisomy 13, one of 45,X, one of triploidy and two cases with other chromosomal abnormalities were detected. In the 33 fetuses with a chromosomal abnormality, the nuchal translucency thickness was <2.5 mm in a case of trisomy 18, > or = 2.5 mm in 32 cases and > or = 3 mm in 28 cases. With cutoffs of 2.5 mm and 3 mm, the sensitivity was 96.97% and 84.85%, respectively. CONCLUSIONS Application of a nuchal translucency thickness cutoff of 2.5 mm is highly efficient for the screening of fetal aneuploidies at 10-12 weeks. This efficiency can be maintained by increasing the regional availability of nuchal translucency screening through the inclusion of newly-trained hospital sonographers.
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Affiliation(s)
- K Wayda
- Department of Medical Genetics, Albert Szent-Györgyi Medical and Pharmaceutical Center, University of Szeged, Szeged, Hungary
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Horváth E, Taller A, Eló J. [Otorhinolaryngeal and phonation aspects of gastroesophageal reflux disease]. Orv Hetil 2001; 142:2617-20. [PMID: 11778359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Experts dealing with patients of chronic upper and lower airway disorders have drawn a lot of interest in the last decades to gastrooesophageal reflux disease (GORD). Nowadays it is obvious that 'occult GORD' may be an aetiological factor in this group of patients. GORD may has a role in lot of organic laryngeal diseases and functional voice disorders. Symptoms are triggered by gastric content refluxed into the oesophagus, which cause irritation and inflammation. At laryngeal and phoniatric examinations gastrointestinal signs might remain hidden behind chronic cough, hoarseness and globus sensation. Authors summarise the diagnostic and therapeutic possibilities of GORD and its typical laryngeal and phoniatric manifestations. Although the first step is medication of GORD, it might come to surgical intervention of the laryngeal alterations, sometimes followed by voice therapy as well. Authors draw attention to patients after laryngectomy, whose voice rehabilitation therapy is extremely hindered by medical therapy resistant GORD. These patients may benefit of anti-reflux surgery.
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Affiliation(s)
- E Horváth
- Fül-orr-gége, Fej-nyaksebészeti Osztály, Fóvárosi Onkormányzat Uzsoki utcai Kórház, Budapest
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De Vry J, Horváth E, Schreiber R. Neuroprotective and behavioral effects of the selective metabotropic glutamate mGlu(1) receptor antagonist BAY 36-7620. Eur J Pharmacol 2001; 428:203-14. [PMID: 11675037 DOI: 10.1016/s0014-2999(01)01296-1] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This study characterized the neuroprotective and behavioral effects of (3aS,6aS)-6a-naphtalen-2-ylmethyl-5-methyliden-hexahydro-cyclopenta[c]furan-1-on (BAY 36-7620), a novel, selective and systemically active metabotropic glutamate (mGlu)(1) receptor antagonist. In the rat, neuroprotective effects were obtained in the acute subdural hematoma model (efficacy of 40-50% at 0.01 and 0.03 mg/kg/h, i.v. infusion during the 4 h following surgery); whereas in the middle cerebral artery occlusion model, a trend for a neuroprotective effect was obtained after triple i.v. bolus application of 0.03-3 mg/kg, given immediately, 2 and 4 h after occlusion. Hypothermic effects were mild and only obtained at doses which were considerably higher than those at which maximal neuroprotective efficacy was obtained, indicating that the neuroprotective effects are not a consequence of hypothermia. BAY 36-7620 protected against pentylenetetrazole-induced convulsions in the mouse (MED: 10 mg/kg, i.v.). As assessed in rats, BAY 36-7620 was devoid of the typical side-effects of the ionotropic glutamate (iGlu) receptor antagonists phencyclidine and (+)-5-methyl-10,11-dihydroxy-5H-dibenzo(a,d)cyclohepten-5,10-imine (MK-801). Thus, BAY 36-7620 did not disrupt sensorimotor gating, induce phencyclidine-like discriminative effects or stereotypical behavior, or facilitate intracranial self-stimulation behavior. Although behavioral stereotypies and disruption of sensorimotor gating induced by amphetamine or apomorphine were not affected by BAY 36-7620, the compound attenuated some behavioral effects of iGlu receptor antagonists, such as excessive grooming or licking, and their facilitation of intracranial self-stimulation behavior. It is concluded that mGlu(1) receptor antagonism results in neuroprotective and anticonvulsive effects in the absence of the typical side-effects resulting from antagonism of iGlu receptors.
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Affiliation(s)
- J De Vry
- CNS Research, Bayer AG, Aprather Weg 18a, D-42096, Wuppertal, Germany.
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