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Peignier M, Bégué L, Ringler M, Szabo B, Ringler E. Regardless of personality, males show similar levels of plasticity in territory defense in a Neotropical poison frog. Sci Rep 2023; 13:3435. [PMID: 36859425 PMCID: PMC9977724 DOI: 10.1038/s41598-023-30546-7] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 02/24/2023] [Indexed: 03/03/2023] Open
Abstract
Animal personality traits are sometimes linked to an individual's degree of plasticity, with certain personality types being more plastic than others. In territorial species, consistently high levels of aggression might increase the risk of harmful fights, while consistently low aggression might lead to the loss of a territory. Consequently, reacting plastically with an appropriate territorial response should be beneficial to avoid these risks. An integrative investigation of both personality traits and plasticity can help us better understand the dynamics of aggressive interactions during male-male competition. Here, we used a free-ranging Neotropical poison frog population to investigate the role of plasticity in male territorial aggression towards intruders. We conducted repeated standardized territorial intrusion experiments mimicking frogs of different body sizes via playback calls with different peak frequencies. We found individual repeatability for the latency to reach and approach a simulated intruder and observed that both aggressive and less aggressive males decreased their level of aggression towards big intruders. However, our results do not support a correlation between personality and plasticity in the context of male territory defense during the breeding season. We discuss how such a correlation between personality and plasticity might be conditional on the costs and benefits across contexts.
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Affiliation(s)
- Mélissa Peignier
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstrasse 50a, 3032, Hinterkappelen, Switzerland.
| | - Lauriane Bégué
- grid.5734.50000 0001 0726 5157Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstrasse 50a, 3032 Hinterkappelen, Switzerland
| | - Max Ringler
- grid.5734.50000 0001 0726 5157Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstrasse 50a, 3032 Hinterkappelen, Switzerland ,grid.440500.50000 0000 8646 069XInstitute of Electronic Music and Acoustics, University of Music and Performing Arts Graz, Graz, Austria
| | - Birgit Szabo
- grid.5734.50000 0001 0726 5157Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstrasse 50a, 3032 Hinterkappelen, Switzerland
| | - Eva Ringler
- grid.5734.50000 0001 0726 5157Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstrasse 50a, 3032 Hinterkappelen, Switzerland
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2
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Szabo B, Ringler E. Geckos differentiate self from other using both skin and faecal chemicals: evidence towards self-recognition? Anim Cogn 2023; 26:1011-1019. [PMID: 36753008 PMCID: PMC10066140 DOI: 10.1007/s10071-023-01751-8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 01/11/2023] [Accepted: 01/30/2023] [Indexed: 02/09/2023]
Abstract
Self-recognition is the ability to recognise stimuli originating from oneself. Humans and some non-human animals show evidence of true visual self-recognition in the mirror test. They use their reflection to inspect themselves and to remove a mark that is only visible in the mirror. Not all animals, however, rely primarily on vision. In lizards, chemical cues are crucial in social interactions, and therefore, lizards would benefit from a chemical self-other distinction. Here, we test the tokay gecko (Gekko gecko), a social species, on their ability to discriminate their own skin and faecal chemicals from those of same-sex, unfamiliar conspecifics. We predicted that individuals would show more self-directed behaviour when confronted with the chemicals from unfamiliar individuals within their home enclosure as a sign of the need for increased comparison. Geckos showed higher self-directed responses towards chemicals from unfamiliar individuals compared to self-produced chemicals and a water control. Furthermore, scat and skin chemicals (regardless of origin) elicited similar but stronger responses than peppermint oil pointing towards a possible social function of scat piles. Although further tests and controls are needed, our study provides evidence towards chemical self-recognition and for a social function of scat piling in tokay geckos.
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Affiliation(s)
- Birgit Szabo
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, 3032, Bern, Switzerland.
| | - Eva Ringler
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, 3032, Bern, Switzerland
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3
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Kecskemeti D, Szabo B, Nagy ZS, Temesvari A, Nagy ZS, Szegedi M, Nyolczas N, Andreka P, Balint H. Patients with congenital heart disease over the age of 60: experiences of a single tertiary centre. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1855] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background
We are currently facing a shift in adult patients with congenital heart disease (ACHD) to older and more complex patients. The growing population of senior patients with congenital heart disease (CHD) is prone to acquired comorbidities.
Purpose
Purpose of our study was to identify the main comorbidities in ACHD patients ≥60 years.
Methods
2726 patients had at least one visit at our ACHD centre between 2010 and 2021, 287 patients of them being 60 or older. Clinical data about the patients' last visit were obtained retrospectively from digital medical records. Based on the complexity of the CHD patients were classified as mild, moderate, and severe. Survival difference was analysed using the Kaplan-Meier method and the log rank test.
Results
Senior patients included in this study were predominantly female (73.2%) with the median age of 69 years. We included 287 patients with mild (47.4%), moderate (39.4%), and severe (13.2%) underlying heart disease. Median age at first visit in our centre was 60 years (IQR 54–67). Over the median follow-up time of 7.9 years (IQR: 3.2–13.2), 20 patients (7%) died with the incidence of 0.8 deaths/100 patient years. The most common complication in this populations were Heart failure (43.2%) and arrhythmia (12.5%). Meanwhile the highest prevalence of heart failure was seen in patients with Eisenmenger syndrome/Pulmonary Arterial Hypertension (84.8%), Tetralogy of Fallot patients had the highest prevalence of arrhythmias (77.8%). 51% of all patients had at least one cardiovascular risk factor (diabetes, hypertension, hyperlipidaemia, or chronic kidney disease). 42% of the patients underwent a non-coronary intervention over the age of 60. The highest mortality was seen in patients with severely complex lesions (p<0.002). As of the comorbidities, significantly higher mortality was observed in seniors with heart failure (p=0.001) or NYHA functional class III/IV (p<0.002).
Conclusions
Although the number of ACHD patients is growing constantly, the population of elderly patients with CHD is still mainly consists of patients with mild or moderate heart defects. Half of the patients had at least one cardiovascular risk factor by the age of 60. As expected, a significantly higher mortality was seen in those with severe heart defects.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- D Kecskemeti
- Semmelweis University, Racz Karoly Doctoral School of Clinical Medicine , Budapest , Hungary
| | - B Szabo
- Semmelweis University, Racz Karoly Doctoral School of Clinical Medicine , Budapest , Hungary
| | - Z S Nagy
- Gottsegen National Cardiovascular Center , Budapest , Hungary
| | - A Temesvari
- Gottsegen National Cardiovascular Center , Budapest , Hungary
| | - Z S Nagy
- Gottsegen National Cardiovascular Center , Budapest , Hungary
| | - M Szegedi
- Gottsegen National Cardiovascular Center , Budapest , Hungary
| | - N Nyolczas
- Gottsegen National Cardiovascular Center , Budapest , Hungary
| | - P Andreka
- Gottsegen National Cardiovascular Center , Budapest , Hungary
| | - H Balint
- Gottsegen National Cardiovascular Center , Budapest , Hungary
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Greis LM, Ringler E, Whiting MJ, Szabo B. Lizards lack speed-accuracy trade-offs in a quantitative foraging task when unable to sample the reward. Behav Processes 2022; 202:104749. [PMID: 36064067 DOI: 10.1016/j.beproc.2022.104749] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 08/30/2022] [Accepted: 08/31/2022] [Indexed: 11/28/2022]
Abstract
To make decisions, animals gather information from the environment in order to avoid costs (e.g., reduced survival) and increase benefits (e.g., foraging success). When time is limited or information is insufficient, most animals face a speed-accuracy trade-off (SAT) - they have to balance the benefits of making quick decisions against the costs of inaccurate decisions. Here, we investigated the relationship between decision accuracy and decision speed in gidgee skinks (Egernia stokesii) performing a food-based spontaneous quantity discrimination task. Rather than a SAT we found a speed-accuracy alignment; lizards made decisions that were fast and accurate, rather than inaccurate. Furthermore, we found only within-, but no between-individual differences in decision making indicating behavioural plasticity in the absence of individual decision styles. Finally, latency to choice was highly repeatable, more so than choice accuracy. Previous work has shown that learning, the costs of a bad decision and task difficulty frequently result in SATs. The lack of a SAT in our lizards might be a direct consequence of our simple testing methodology which prevented learning by not allowing lizards to consume the chosen quantity. To fully understand how SATs develop, different methodologies that control the costs and benefits of decisions should be compared.
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Affiliation(s)
- Lisa M Greis
- Faculty of Life Sciences, University of Vienna, Vienna, Austria
| | - Eva Ringler
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland
| | - Martin J Whiting
- School of Natural Sciences, Macquarie University, Sydney, Australia
| | - Birgit Szabo
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland.
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Szabo B, Whiting MJ. A new protocol for investigating visual two-choice discrimination learning in lizards. Anim Cogn 2022; 25:935-950. [PMID: 35124743 PMCID: PMC9334418 DOI: 10.1007/s10071-022-01603-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 12/16/2021] [Accepted: 01/25/2022] [Indexed: 11/18/2022]
Abstract
One of the most widely studied abilities in lizards is discrimination learning. The protocols used to test lizards are often novel or adapted from other taxa without proper validation. We need to ensure that tests of discrimination learning are appropriate and properly applied in lizards so that robust inferences can be made about cognitive ability. Here, we present a new protocol for testing lizard discrimination learning that incorporates a target training procedure, uses many daily trials for efficiency and reinforcement, and has a robust, validated, learning criterion. We trained lizards to touch a cue card using operant conditioning and tested lizards separately on a colour, and pattern discrimination test. Lizards successfully learnt to touch a cue card and to discriminate between light and dark blue but had issues discriminating the patterns. After modifying the test procedure, some lizards reached criterion, revealing possible issues with stimulus processing and interference of generalisation. Here, we describe a protocol for operant conditioning and two-choice discrimination learning in lizards with a robust learning criterion that can help researcher better design future studies on discrimination learning in lizards.
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Szabo B, Mangione R, Rath M, Pašukonis A, Reber SA, Oh J, Ringler M, Ringler E. Naive poison frog tadpoles use bi-modal cues to avoid insect predators but not heterospecific predatory tadpoles. J Exp Biol 2021; 224:jeb243647. [PMID: 34845497 PMCID: PMC8729909 DOI: 10.1242/jeb.243647] [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] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 11/25/2021] [Indexed: 11/20/2022]
Abstract
For animals to survive until reproduction, it is crucial that juveniles successfully detect potential predators and respond with appropriate behavior. The recognition of cues originating from predators can be innate or learned. Cues of various modalities might be used alone or in multi-modal combinations to detect and distinguish predators but studies investigating multi-modal integration in predator avoidance are scarce. Here, we used wild, naive tadpoles of the Neotropical poison frog Allobates femoralis ( Boulenger, 1884) to test their reaction to cues with two modalities from two different sympatrically occurring potential predators: heterospecific predatory Dendrobates tinctorius tadpoles and dragonfly larvae. We presented A. femoralis tadpoles with olfactory or visual cues, or a combination of the two, and compared their reaction to a water control in a between-individual design. In our trials, A. femoralis tadpoles reacted to multi-modal stimuli (a combination of visual and chemical information) originating from dragonfly larvae with avoidance but showed no reaction to uni-modal cues or cues from heterospecific tadpoles. In addition, visual cues from conspecifics increased swimming activity while cues from predators had no effect on tadpole activity. Our results show that A. femoralis tadpoles can innately recognize some predators and probably need both visual and chemical information to effectively avoid them. This is the first study looking at anti-predator behavior in poison frog tadpoles. We discuss how parental care might influence the expression of predator avoidance responses in tadpoles.
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Affiliation(s)
- Birgit Szabo
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstrasse 50a, 3032 Hinterkappelen, Switzerland
| | - Rosanna Mangione
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstrasse 50a, 3032 Hinterkappelen, Switzerland
| | - Matthias Rath
- Department of Behavioral and Cognitive Biology, University of Vienna, 1030 Vienna, Austria
| | - Andrius Pašukonis
- Department of Behavioral and Cognitive Biology, University of Vienna, 1030 Vienna, Austria
- CEFE, Université de Montpellier, CNRS, EPHE, IRD, 34293 Montpellier 5, France
| | - Stephan A. Reber
- Department of Behavioral and Cognitive Biology, University of Vienna, 1030 Vienna, Austria
- Lund University Cognitive Science, Lund University, 223 62 Lund, Sweden
- Messerli Research Institute, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
| | - Jinook Oh
- Department of Behavioral and Cognitive Biology, University of Vienna, 1030 Vienna, Austria
- Cremer Group, Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria
| | - Max Ringler
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstrasse 50a, 3032 Hinterkappelen, Switzerland
- Department of Behavioral and Cognitive Biology, University of Vienna, 1030 Vienna, Austria
- Department of Evolutionary Biology, University of Vienna, 1030 Vienna, Austria
- Institute of Electronic Music and Acoustics, University of Music and Performing Arts Graz, 8010 Graz, Austria
| | - Eva Ringler
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstrasse 50a, 3032 Hinterkappelen, Switzerland
- Department of Behavioral and Cognitive Biology, University of Vienna, 1030 Vienna, Austria
- Messerli Research Institute, University of Veterinary Medicine Vienna, 1210 Vienna, Austria
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7
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De Mos O, Gothot A, Szabo B. [Ferritinemia, a complex marker of iron metabolism]. Rev Med Liege 2021; 76:799-804. [PMID: 34738753] [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] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Ferritinemia is a basic analysis in the exploration of iron deficiency. However, its interpretation is difficult and limited due to the complexity of ferritin metabolism, which is still poorly understood, and its sensitivity to many factors, including inflammation. A more correct diagnostic approach can be obtained by combining ferritin measurement with other parameters, but at the expense of practicality. New markers should make it possible to refine the diagnosis of iron deficiency in the future.
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Affiliation(s)
- O De Mos
- Laboratoire de Biologie clinique, CHR Verviers, Belgique
| | - A Gothot
- Service d'Hématologie biologique et Immunohématologie, CHU, Liège, Belgique
| | - B Szabo
- Banque de sang CHR, Verviers, Belgique
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8
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Abstract
Abstract
While foraging or during social interactions, animals may benefit from judging relative quantity. Individuals may select larger prey or a patch with more food and, likewise, it may pay to track the number and type of individuals and social interactions. We tested for spontaneous quantity discrimination in the gidgee skink (Egernia stokesii), a family-living lizard. Lizards were presented with food quantities differing in number or size and were able to select the larger quantity of food items when they differed in number but not when items differed in size. We show, for the first time, superior spontaneous discrimination of items differing in number over size in a lizard species, which contrasts with previous findings. Our simple method, however, did not include controls for the use of continuous quantities, and further tests are required to determine the role of such information during quantity discrimination. Our results provide support for the use of the parallel individuation system for the discrimination of small quantities (four or fewer items). Lizards might, however, still use the approximate number system if items in larger quantities (more than four) are presented. Overall, we uncovered evidence that species might possess specific cognitive abilities potentially adapted to their niche with respect to quantity information (discrete and/or continuous) and the processing system used when judging quantities. Importantly, our results highlight the need for testing multiple species using similar testing procedures to gain a better understanding of the underlying causes leading to differences across species.
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Affiliation(s)
- Birgit Szabo
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstrasse 50a, 3032 Bern, Switzerland
- Department of Biological Sciences, Macquarie University, North Ryde, Sydney, NSW 2109, Australia
| | - Daniel W A Noble
- Division of Ecology and Evolution, Research School of Biology, The Australian National University, Canberra, ACT, Australia
| | - Kaitlin J McCloghry
- Department of Biological Sciences, Macquarie University, North Ryde, Sydney, NSW 2109, Australia
| | - Marco E S Monteiro
- Department of Biological Sciences, Macquarie University, North Ryde, Sydney, NSW 2109, Australia
| | - Martin J Whiting
- Department of Biological Sciences, Macquarie University, North Ryde, Sydney, NSW 2109, Australia
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9
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Abstract
We tested learning and behavioral flexibility in family-living gidgee skinks (Egernia stokesii) using a multistage visual discrimination task that included acquisition and reversal stages using simple and compound stimuli composed of black shapes superimposed on a colored background. We evaluated how lizards learn compound cues through a probe test. Lizards showed behavioral flexibility through reversal learning using simple stimuli (only color or shape). Our lizards used compound stimuli to learn a discrimination but had problems reversing and generalizing across novel compound stimuli. In the probe test, lizards chose the correct stimulus in a novel pairing with a distractor feature even without previous experience with compound stimuli. Our results suggest that some lizards are likely able to attend selectively to the relevant features of our compound stimuli while ignoring irrelevant features instead of using the configuration of a cue card as a whole to learn to discriminate between compound stimuli. We hope that our work will spark interest in further studies looking at how lizards (and reptiles in general) learn to solve visual discrimination problems. (PsycInfo Database Record (c) 2021 APA, all rights reserved).
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Affiliation(s)
- Birgit Szabo
- Department of Biological Sciences, Macquarie University
| | - Daniel W A Noble
- Division of Ecology and Evolution, Research School of Biology, The Australian National University
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10
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Antal A, Szegedi M, Takacs E, Szabo B, Solymosi B, Vincze V, Ablonczy L, Kornyei L, Temesvari A, Andreka P, Balint H. Outcome of patients with tetralogy of Fallot repair over 50 years of age. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2223] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Purpose
To report the outcomes of patients with repaired tetralogy of Fallot (TOF) above 50 years of age.
Methods
We reviewed records of TOF patients who were followed in our institution since 2000. Demographic data, surgical reports and long-term outcomes were analyzed retrospectively.
Results
Thirty-five of 297 (12%) patients who underwent TOF repair were above 50 years of age (25 men [60%]) at the last follow-up. Eighteen patients (48%) had prior palliative surgery. The mean age at the first repair was 18±13 years (5 patients after 40 years of age). Reoperation with pulmonary valve replacement was performed in 10 (28%) patients, and a second redo surgery in 6 (17%) patients. During a mean 17± 2 years follow-up 7 (8.5%) patients died (n=6 end-stage heart failure, n=1 infective endocarditis). At the last follow-up 21/35 patients (60%) were treated with tachyarrhythmia, 19/35 (54%) with chronic heart failure and 17/35 (48%) with comorbidities (hypertension, coronary artery disease/peripherial artery disease, diabetes mellitus, renal failure). Using multivariate analysis the only predictor of death was heart failure (OR: 6.8). Furthermore atrial tachycardia (OR: 8.8) and at least grade II tricuspid regurgitation (OR: 5.0) were identified as predictors of heart failure.
Conclusion
This historical cohort of TOF patients with late repair has a high morbidity rate later in life. Approximately half of the patients require treatment for chronic heart failure, arrhythmias and cardiovascular related comorbidities. Atrial tachycardia and tricuspid regurgitation are strong predictors for heart failure. In this population the strongest predictor for death is heart failure.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- A Antal
- Gottsegen Gy Hungarian Institute of Cardiolog, Bonyhad, Hungary
| | - M Szegedi
- Gottsegen Gy Hungarian Institute of Cardiolog, Bonyhad, Hungary
| | - E Takacs
- Gottsegen Gy Hungarian Institute of Cardiolog, Bonyhad, Hungary
| | - B Szabo
- Gottsegen Gy Hungarian Institute of Cardiolog, Bonyhad, Hungary
| | - B Solymosi
- Gottsegen Gy Hungarian Institute of Cardiolog, Bonyhad, Hungary
| | - V Vincze
- Gottsegen Gy Hungarian Institute of Cardiolog, Bonyhad, Hungary
| | - L Ablonczy
- Gottsegen Gy Hungarian Institute of Cardiolog, Bonyhad, Hungary
| | - L Kornyei
- Gottsegen Gy Hungarian Institute of Cardiolog, Bonyhad, Hungary
| | - A Temesvari
- Gottsegen Gy Hungarian Institute of Cardiolog, Bonyhad, Hungary
| | - P Andreka
- Gottsegen Gy Hungarian Institute of Cardiolog, Bonyhad, Hungary
| | - H Balint
- Gottsegen Gy Hungarian Institute of Cardiolog, Bonyhad, Hungary
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Szabo B, Noble DWA, Whiting MJ. Learning in non-avian reptiles 40 years on: advances and promising new directions. Biol Rev Camb Philos Soc 2020; 96:331-356. [PMID: 33073470 DOI: 10.1111/brv.12658] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 09/30/2020] [Accepted: 10/05/2020] [Indexed: 01/06/2023]
Abstract
Recently, there has been a surge in cognition research using non-avian reptile systems. As a diverse group of animals, non-avian reptiles [turtles, the tuatara, crocodylians, and squamates (lizards, snakes and amphisbaenids)] are good model systems for answering questions related to cognitive ecology, from the role of the environment on the brain, behaviour and learning, to how social and life-history factors correlate with learning ability. Furthermore, given their variable social structure and degree of sociality, studies on reptiles have shown that group living is not a pre-condition for social learning. Past research has demonstrated that non-avian reptiles are capable of more than just instinctive reactions and basic cognition. Despite their ability to provide answers to fundamental questions in cognitive ecology, and a growing literature, there have been no recent systematic syntheses of research in this group. Here, we systematically, and comprehensively review studies on reptile learning. We identify 92 new studies investigating learning in reptiles not included in previous reviews on this topic - affording a unique opportunity to provide a more in-depth synthesis of existing work, its taxonomic distribution, the types of cognitive domains tested and methodologies that have been used. Our review therefore provides a major update on our current state of knowledge and ties the collective evidence together under nine umbrella research areas: (i) habituation of behaviour, (ii) animal training through conditioning, (iii) avoiding aversive stimuli, (iv) spatial learning and memory, (v) learning during foraging, (vi) quality and quantity discrimination, (vii) responding to change, (viii) solving novel problems, and (ix) social learning. Importantly, we identify knowledge gaps and propose themes which offer important future research opportunities including how cognitive ability might influence fitness and survival, testing cognition in ecologically relevant situations, comparing cognition in invasive and non-invasive populations of species, and social learning. To move the field forward, it will be immensely important to build upon the descriptive approach of testing whether a species can learn a task with experimental studies elucidating causal reasons for cognitive variation within and among species. With the appropriate methodology, this young but rapidly growing field of research should advance greatly in the coming years providing significant opportunities for addressing general questions in cognitive ecology and beyond.
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Affiliation(s)
- Birgit Szabo
- Department of Biological Sciences, Macquarie University, North Ryde, NSW, 2109, Australia.,Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstrasse 50a, Bern, 3032, Switzerland
| | - Daniel W A Noble
- Division of Ecology and Evolution, Research School of Biology, The Australian National University, Canberra, ACT, Australia
| | - Martin J Whiting
- Department of Biological Sciences, Macquarie University, North Ryde, NSW, 2109, Australia
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Szabo B, Damas-Moreira I, Whiting MJ. Can Cognitive Ability Give Invasive Species the Means to Succeed? A Review of the Evidence. Front Ecol Evol 2020. [DOI: 10.3389/fevo.2020.00187] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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13
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Szabo B, Whiting MJ. Do lizards have enhanced inhibition? A test in two species differing in ecology and sociobiology. Behav Processes 2020; 172:104043. [PMID: 31953131 DOI: 10.1016/j.beproc.2020.104043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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] [Received: 09/12/2019] [Revised: 01/13/2020] [Accepted: 01/13/2020] [Indexed: 11/18/2022]
Abstract
Waiting for the right moment to strike, avoiding the ingestion of harmful foods, or ignoring stimuli associated with ephemeral or depleted resources requires the inhibition of prepotent responses. Good response inhibition facilities flexibility in behaviour which is associated with survival in unpredictable environments. To investigate differences in behavioural flexibility in lizards, we tested reversal learning in the sleepy lizard (Tiliqua rugosa asper) and compared its performance to the relatively closely related eastern blue-tongue skink (Tiliqua scincoides scincoides). We presented both species with a choice between either a light and dark blue stimulus or a triangle and X shape. Both species were able to learn to discriminate between these stimuli and showed similar learning ability during the acquisition of the discrimination. Sleepy lizards, however, demonstrated a higher probability of making a correct choice at the start of the reversal, hinting towards enhanced stimulus response inhibition. Sleepy lizards and blue-tongue skinks inhabit different environments and show differences in ecology and sociobiology, all of which could possibly lead to adaptive specialisation in cognitive ability. Although further research is required, we propose that selection might have led to a change in stimulus response inhibition in the arid-adapted sleepy lizard, because better response inhibition may help them avoid the costs of repeated choices towards stimuli which no longer predict a beneficial outcome.
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Affiliation(s)
- Birgit Szabo
- Department of Biological Sciences, Macquarie University, Sydney, Australia.
| | - Martin J Whiting
- Department of Biological Sciences, Macquarie University, Sydney, Australia
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Morales Picard A, Mundry R, Auersperg AM, Boeving ER, Boucherie PH, Bugnyar T, Dufour V, Emery NJ, Federspiel IG, Gajdon GK, Guéry J, Hegedič M, Horn L, Kavanagh E, Lambert ML, Massen JJM, Rodrigues MA, Schiestl M, Schwing R, Szabo B, Taylor AH, Horik JO, Bayern AMP, Seed A, Slocombe KE. Why preen others? Predictors of allopreening in parrots and corvids and comparisons to grooming in great apes. Ethology 2019. [DOI: 10.1111/eth.12999] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
| | - Roger Mundry
- Messerli Research Institute University of Veterinary Medicine Vienna Medical University Vienna University of Vienna Vienna Austria
- Platform Bioinformatics and Biostatistics University of Veterinary Medicine Vienna Vienna Austria
| | - Alice M. Auersperg
- Messerli Research Institute University of Veterinary Medicine Vienna Medical University Vienna University of Vienna Vienna Austria
| | - Emily R. Boeving
- Department of Psychology Florida International University Miami FL USA
| | - Palmyre H. Boucherie
- Institut Pluridisciplinaire Hubert Curien University of Strasbourg Strasbourg France
- Centre National de la Recherche Scientifique UMR 7178 Strasbourg France
| | - Thomas Bugnyar
- Department of Cognitive Biology University of Vienna Vienna Austria
| | - Valérie Dufour
- UMR Physiologie de la Reproduction et des Comportements INRA‐CNRS Université de Tours‐IFCE Nouzilly France
| | - Nathan J. Emery
- School of Biological & Chemical Sciences Queen Mary University of London London UK
| | - Ira G. Federspiel
- Department of Cognitive Biology University of Vienna Vienna Austria
- University of Cambridge Cambridge UK
| | - Gyula K. Gajdon
- Messerli Research Institute University of Veterinary Medicine Vienna Medical University Vienna University of Vienna Vienna Austria
| | | | - Matjaž Hegedič
- Department of Cognitive Biology University of Vienna Vienna Austria
| | - Lisa Horn
- Department of Cognitive Biology University of Vienna Vienna Austria
| | | | - Megan L. Lambert
- Department of Psychology University of York York UK
- Messerli Research Institute University of Veterinary Medicine Vienna Medical University Vienna University of Vienna Vienna Austria
| | - Jorg J. M. Massen
- Department of Cognitive Biology University of Vienna Vienna Austria
- Animal Ecology Group Utrecht University Utrecht The Netherlands
| | - Michelle A. Rodrigues
- Beckman Institute for Advanced Science and Technology University of Illinois Urbana IL USA
| | - Martina Schiestl
- School of Psychology University of Auckland Auckland New Zealand
| | - Raoul Schwing
- Messerli Research Institute University of Veterinary Medicine Vienna Medical University Vienna University of Vienna Vienna Austria
| | - Birgit Szabo
- Department of Cognitive Biology University of Vienna Vienna Austria
- Department of Biological Sciences Macquarie University Sydney Australia
| | - Alex H. Taylor
- School of Psychology University of Auckland Auckland New Zealand
| | - Jayden O. Horik
- Centre for Research in Animal Behaviour, Psychology University of Exeter Exeter UK
| | | | - Amanda Seed
- School of Psychology and Neuroscience University of St Andrews St Andrews UK
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Szabo B, Schmitt J, Gothot A. [The Patient Blood Management]. Rev Med Liege 2018; 73:502-207. [PMID: 30335255] [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] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Patient Blood Management (PBM) is a comprehensive hospital approach to the anemic patient or at risk of becoming anemic, aimed at protecting and optimizing the patient's blood capital and resistance. The main aim of BPM is to combat the risk factors of anaemia, hemorrhage and blood transfusion. PBM involves transdisciplinary collaboration ranging from pre-hospital prevention to post-hospital follow-up. This combination of techniques and preventive actions considerably improves the medicosurgical prognosis and contributes to the drastic reduction in the use of blood transfusion. PBM is expanding worldwide and should eventually become an evolving treatment standard.
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Affiliation(s)
- B Szabo
- Service d' Immuno-Hématologie et Médecine transfusionnelle CHU de Liège, Belgique
| | - J Schmitt
- Laboratoire d'Immuno-Hématologie et Banque de Sang, CHR Verviers, Belgique
| | - A Gothot
- Service laboratoire d'Hématologie et d'Immuno-Hématologie, CHU de Liège, Belgique
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Szabo B, Noble DW, Byrne RW, Tait DS, Whiting MJ. Subproblem learning and reversal of a multidimensional visual cue in a lizard: evidence for behavioural flexibility? Anim Behav 2018. [DOI: 10.1016/j.anbehav.2018.07.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Kohalmi DK, Szabo B, Takacs E, Andreka P, Balint OH, Temesvari A. P5452Pregnancy risk in women with severe aortic stenosis. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5452] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- D K Kohalmi
- Gottsegen Gyorgy Hungarian Institute of Cardiology, Budapest, Hungary
| | - B Szabo
- Gottsegen Gyorgy Hungarian Institute of Cardiology, Budapest, Hungary
| | - E Takacs
- Gottsegen Gyorgy Hungarian Institute of Cardiology, Budapest, Hungary
| | - P Andreka
- Gottsegen Gyorgy Hungarian Institute of Cardiology, Budapest, Hungary
| | - O H Balint
- Gottsegen Gyorgy Hungarian Institute of Cardiology, Budapest, Hungary
| | - A Temesvari
- Gottsegen Gyorgy Hungarian Institute of Cardiology, Budapest, Hungary
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Muk B, Vamos M, Bogyi P, Szabo B, Vagany D, Majoros ZS, Szabo M, Borsanyi T, Dekany M, Duray GZ, Kiss RG, Nyolczas N. 205The impact of serum concentration guided digoxin therapy on mortality: a long-term follow-up, propensity-matched cohort study. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.205] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- B Muk
- Medical Centre, Hungarian Defence Forces, Cardiology, Budapest, Hungary
| | - M Vamos
- Goethe University, Cardiology, Frankfurt am Main, Germany
| | - P Bogyi
- Medical Centre, Hungarian Defence Forces, Cardiology, Budapest, Hungary
| | - B Szabo
- Orebro University Hospital, Cardiology Clinic, Orebro, Sweden
| | - D Vagany
- Medical Centre, Hungarian Defence Forces, Cardiology, Budapest, Hungary
| | - Z S Majoros
- Medical Centre, Hungarian Defence Forces, Cardiology, Budapest, Hungary
| | - M Szabo
- Medical Centre, Hungarian Defence Forces, Cardiology, Budapest, Hungary
| | - T Borsanyi
- Medical Centre, Hungarian Defence Forces, Cardiology, Budapest, Hungary
| | - M Dekany
- Medical Centre, Hungarian Defence Forces, Cardiology, Budapest, Hungary
| | - G Z Duray
- Medical Centre, Hungarian Defence Forces, Cardiology, Budapest, Hungary
| | - R G Kiss
- Medical Centre, Hungarian Defence Forces, Cardiology, Budapest, Hungary
| | - N Nyolczas
- Medical Centre, Hungarian Defence Forces, Cardiology, Budapest, Hungary
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Szabo E, Demuth B, Nagy B, Molnar K, Farkas A, Szabo B, Balogh A, Hirsch E, Nagy B, Marosi G, Nagy ZK. Scaled-up preparation of drug-loaded electrospun polymer fibres and investigation of their continuous processing to tablet form. EXPRESS POLYM LETT 2018. [DOI: 10.3144/expresspolymlett.2018.37] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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21
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Pascalau R, Szabo B. Fibre Dissection and Sectional Study of the Major Porcine Cerebral White Matter Tracts. Anat Histol Embryol 2017; 46:378-390. [PMID: 28677169 DOI: 10.1111/ahe.12280] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 06/02/2017] [Indexed: 01/19/2023]
Abstract
White matter anatomy is the basis for numerous applications in neurology, neurosurgery and fundamental neuroscience. Although the porcine brain is frequently used as experimental model in these fields of research, the description of its white matter is not as thorough as in the human brain or other species. Thus, the aim of this study is to describe the porcine white matter tracts in a complex manner. Two stepwise dissection protocols adapted from human anatomy were performed on six adult pig brain hemispheres prepared according to the Klingler method. Other four hemispheres were sectioned along section planes that were chosen similar to the Talairach coordinate system. As a result, three commissural tracts, seven association tracts and one projection tract were identified: corpus callosum, fornix, commissura rostralis, the short-association tracts, fasciculus longitudinalis superior, fasciculus uncinatus, fasciculus longitudinalis inferior, fasciculus occipitofrontalis inferior, cingulum, tractus mamillothalamicus and capsula interna. They were described and illustrated from multiple points of view, focusing on their trajectory, position, dimensions and anatomical relations. All in all, we achieved a three-dimensional understanding of the major tracts. The results are ready to be applied in future imagistic or experimental studies.
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Affiliation(s)
- R Pascalau
- Iuliu Hatieganu University of Medicine and Pharmacy, 8 Babes Street, 400012, Cluj-Napoca, Romania
| | - B Szabo
- Department of Anatomy and Embryology, Iuliu Hatieganu University of Medicine and Pharmacy, 8 Babes Street, 400012, Cluj-Napoca, Romania.,Department of Ophthalmology, Emergency County Hospital, 3-5 Clinicilor Street, 400006, Cluj-Napoca, Romania
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Căpîlna ME, Szabo B, Rusu SC, Becsi J, Moldovan B, Neagoe RM, Muhlfay G. Anatomical variations of the obturator veins and their surgical implications. EUR J GYNAECOL ONCOL 2017; 38:263-265. [PMID: 29953792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
PURPOSE OF INVESTIGATION The obturator veins and their network contribute to major bleeding complications during gynaecologic surgery. MATERIALS AND METHODS The anatomical variations of the obturator veins were studied on 106 patients in which a thorough bilateral pelvic lymphadenectomy was performed. RESULTS Symmetrical drainage on right and left sides was found in 75 cases: only in internal iliac vein in 32 cases, both in external iliac vein and internal in 41 cases, and only in external in two cases (so called "pubic vein"). In 31 procedures, asymmetric drainage was found between the two sides: one side in internal, the other side both in internal and external in 25 patients; in three patients, in external on one side and in both internal and external on the other; and in external on one side and in internal on the other side in one patient. CONCLUSIONS Anatomical variations of the obturator veins appear quite often.
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Capilna ME, Szabo B, Rusu SC, Becsi J, Szasz FC, Morariu M, Moldovan B, Pascanu IM. Abdominal radical trachelectomy (ART) performed during pregnancy: a case report. EUR J GYNAECOL ONCOL 2017; 38:129-131. [PMID: 29767881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
PURPOSE OF INVESTIGATION Cervical cancer is one of the most frequent malignant diseases diagnosed during pregnancy. Abdominal or vaginal radical trachelectomies are fertility-preserving alternatives to radical hysterectomy for young women with early-stage cervical cancer that can be performed during ongoing pregnancy. MATERIAL AND METHODS The authors report a pregnancy complicated by cervical cancer treated by abdominal radical trachelectomy (ART) at 16-17 gestational weeks with preservation of the concurrent pregnancy. RESULTS The pregnancy evolved normally and delivery occurred at 38-39 gestational weeks by elective caesarean section. CONCLUSIONS Radical trachelectomy could be offered as an option for pregnant patients with early invasive cervical cancer. It may help women to avoid the triple losses of a desired pregnancy, fertility, and motherhood.
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Căpîlna ME, Szabo B, Nicolau CR, Daniilidis A, Neagoe RM, Moldovan B. The mandatory role of groin lymphadenectomy in clinical Stages IB and II vulvar cancer. EUR J GYNAECOL ONCOL 2016; 37:86-88. [PMID: 27048116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
PURPOSE OF INVESTIGATION To analyze the prevalence of inguinofemoral lymph nodes metastases in clinical Stages IB-II vulva cancer. MATERIALS AND METHODS Twenty-two patients with FIGO Stages IB-II FIGO vulva cancer with no clinically and imagistic evidence of nodes metastases were treated in the present clinic. The surgical procedures consisted in radical vulvectomy plus inguinofemoral lym- phadenectomy. RESULTS The final pathological result was squamous carcinoma in 20 patients, vulva melanoma in one, and carcinosar- coma in one. The prevalence of positive lymph nodes was 45.4%. The median number of harvested lymph nodes was 14.0 per groin (between four and 27). Twelve patients (54.5%) developed some wound complications, but all were resolved. At the present time, 20 patients are alive, but the follow-up period is short for many of them; two patients died of disease. CONCLUSION The prevalence of groin metastases in Stages IB-II vulvar cancer is high. A thorough inguino-femoral dissection seems necessary, despite the high incidence of wound complications.
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Chvatal A, Szabo B, Szabo-Revesz P, Ambrus R. [Formulation of new generation drug delivery system for dry powder inhalation.]. Acta Pharm Hung 2016; 86:75-83. [PMID: 29489079] [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: 06/08/2023]
Abstract
Based on the formulation method the dry powder inhalers (DPIs) can be divided in too types: carrier-based and carrier-free drug delivery systems. The newest researches report about several high potency carrier-free formulations, where the active ingredient and the excipients are together formulated to the DPI form. However, in Hungary the commercially available DPIs are carrier-based (e.g. lactose), which means that only the mic-onized active ingredient reaches the deeper lungs, the big carrier deposits in the upper airways. The present work is about formulating a high efficacy mannitol-based Pulmonary Drug Delivery System (PDDS), which is able to delivery different types of active ingredients to the deeper lungs with higher deposition rate. The present study involves the physico-chemical and aerodynamical characterisation of mannitol-based PDDS. The results demonstrated the use of the appropriate excipients (leucine, poly-vinyl-alcohol, cyclodextrine) and solvent combination (ethanol-water) during the co-spray drying, increases the inhalation properties of the mannitol. Such carrier systems with optimized properties can increase the aerolization efficacy of the active ingredient.
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Pascalau R, Aldea CC, Padurean VA, Szabo B. Comparative Study of the Major White Matter Tracts Anatomy in Equine, Feline and Canine Brains by Use of the Fibre Dissection Technique. Anat Histol Embryol 2015; 45:373-85. [PMID: 26394884 DOI: 10.1111/ahe.12208] [Citation(s) in RCA: 8] [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] [Received: 05/13/2015] [Accepted: 08/21/2015] [Indexed: 01/31/2023]
Abstract
The spatial anatomy of the white matter tracts is a subject of growing interest not only for researchers but also for clinicians. Imagistic methods have some limitations so that they should be confronted with dissection studies. The aim of this paper was to provide a three-dimensional view of the major white matter tracts in equine, feline and canine brains by use of the fibre dissection technique. Twenty cerebral hemispheres (six equine, four feline and 10 canine brains) were prepared according to the Klingler method. Stepwise mediolateral and lateromedial blunt dissections were performed using wooden sticks and spatulas. The lateromedial dissection was followed by the opening of the lateral ventricle. The use of the same multi-stage procedures resulted in a comparable exposure of the major association, projection and commissural fibres and their spatial relation with the lateral ventricle. To conclude, the proposed techniques are reproducible in equine, feline and canine brains and they can be successfully used for teaching, training or research in the field of neurobiology.
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Affiliation(s)
- R Pascalau
- Iuliu Hatieganu University of Medicine and Pharmacy, 8 Babes Street, 400012, Cluj-Napoca, Romania.
| | - C C Aldea
- Iuliu Hatieganu University of Medicine and Pharmacy, 8 Babes Street, 400012, Cluj-Napoca, Romania
| | - V A Padurean
- Iuliu Hatieganu University of Medicine and Pharmacy, 8 Babes Street, 400012, Cluj-Napoca, Romania
| | - B Szabo
- Department of Anatomy and Embryology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania.,Department of Ophthalmology, Emergency County Hospital, Cluj-Napoca, Romania
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Căpîlna ME, Moldovan B, Szabo B. Pelvic exenteration--our initial experience in 15 cases. EUR J GYNAECOL ONCOL 2015; 36:142-145. [PMID: 26050350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To analyse the initial experience of pelvic exenteration for gynaecological malignancies in a tertiary referral center. MATERIALS AND METHODS Between 2011 and 2013, 15 patients underwent a pelvic exenteration for gynaecological malignancies. RESULTS Out of the 15 exenterations, six were total, four anterior, and five posterior. The indication was cervical (nine patients), advanced vaginal (one patient), and ovarian cancer (in five patients). A Bricker non-continent ileal urinary conduit was performed in all ten anterior and total exenterations. In-hospital complications occurred in six patients (40%) of whom two perioperative deaths (13%). Among the 15 patients, at this moment, eight are alive and six died because of the disease, and one was lost to follow-up. CONCLUSION Pelvic exenterantion for recurrent or advanced pelvic malignancies can be associated with long-term survival and even cure without high perioperative mortality in properly selected patients. However, postoperative complications are common and can be lethal.
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Căpîlna ME, Rusu SC, Puiac CI, Daniilidis A, Szabo B. Spontaneous intrauterine pregnancy following abdominal radical trachelectomy--a case report. EUR J GYNAECOL ONCOL 2015; 36:229-230. [PMID: 26050369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The authors describe a case report of spontaneous pregnancy after an abdominal radical trachelectomy because of cervical cancer Stage IB2.
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Căpîlna ME, Rusu SC, Laczko C, Szabo B, Marian C. Three synchronous primary pelvic cancers--a case report. EUR J GYNAECOL ONCOL 2015; 36:216-218. [PMID: 26050365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The occurrence of synchronous primary gynaecologic malignancies is a relatively common event. However, the occurrence of three different pelvic cancers is very rare. In this report, the authors describe the clinical, surgical, and pathological findings of a patient with synchronous primary malignancies of the fallopian tube, endometrium, and sigmoid colon. To the authors' knowledge, it is the first case described in the literature with such an association of primary synchronous cancers.
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Căpîlna ME, Rusu SC, Szabo B, Marian C. Three synchronous primary pelvic cancers--a case report. Rev Med Chir Soc Med Nat Iasi 2014; 118:107-110. [PMID: 24741785] [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: 06/03/2023]
Abstract
The occurrence of synchronous primary gynaecologic malignancies is a relatively common event. However, the occurrence of three different pelvic cancers is very rare. In this report, we describe the clinical, surgical and pathological findings of a patient with synchronous primary malignancies of the fallopian tube, endometrium and sigmoid colon. To our knowledge, it is the first case described in the literature with such an association of primary synchronous cancers.
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Nyolczas N, Szabo B, Dekany M, Borsanyi T, Ancsin B, Muk B, Marton GY, Vamos M, Duray G, Kiss RG. CRT-P or CRT-D? Which parameters can help in selection? Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3204] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Abstract
The ability to represent hidden objects plays an important role in the survival of many species. In order to provide an inclusive synopsis of the current benchmark tasks used to test object permanence in animals for a psittacine representative, we tested eight Goffin cockatoos (Cacatua goffini) on Stages 3-6 of Piagetian object permanence as well as derivations of spatial transposition, rotation, and translocation tasks. Subjects instantly solved visible displacement 3b and 4a but showed an extended plateau for solving Stage 5a at a very late age (10 months). Subjects readily solved most invisible displacement tasks including double hidings and four angles (90°, 180°, 270°, and 360°) of rotation and translocations at high performance levels, although Piagetian Stage 6 invisible displacement tasks caused more difficulties for the animals than transposition, rotations, and translocation tasks.
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Affiliation(s)
| | - Birgit Szabo
- Department of Cognitive Biology, University of Vienna
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Auersperg AMI, Szabo B, von Bayern AMP, Kacelnik A. Spontaneous innovation in tool manufacture and use in a Goffin's cockatoo. Curr Biol 2013; 22:R903-4. [PMID: 23137681 DOI: 10.1016/j.cub.2012.09.002] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Van der Linden P, Lambermont M, Dierick A, Hübner R, Benoit Y, De Backer D, De Paep R, Ferrant A, Latinne D, Muylle L, Selleslag D, Szabo B, Thomas I, Vandekerckhove B, Deneys V. Recommendations in the event of a suspected transfusion-related acute lung injury (TRALI). Acta Clin Belg 2012; 67:201-8. [PMID: 22897069 DOI: 10.2143/acb.67.3.2062656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The following recommendations, which aim at improving the clinical diagnosis ofTRALI and the laboratory investigations that can support it, were drawn up by a working group of the Superior Health Council. TRALI is a complication of blood transfusion that is both serious and underreported. Systematic reporting may help to develop preventive actions. Therefore, the Superior Health Council recommends that there should be a more stringent surveillance of patients who receive a blood component transfusion. The clinician should pay very close attention to any change in the patient's respiratory status (cf. dyspnoea and arterial desaturation), which should be notified systematically to the haemovigilance contact person in the hospital.
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Affiliation(s)
- P Van der Linden
- Service d'Anesthésiologie, CHU Brugmann-HUDERF, Université Libre de Bruxelles (ULB), Belgium.
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Urbanski M, Kovacs F, Szabo B. Endocannabinoid-mediated synaptically evoked suppression of GABAergic transmission in the cerebellar cortex. Neuroscience 2010; 169:1268-78. [DOI: 10.1016/j.neuroscience.2010.05.036] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Revised: 04/23/2010] [Accepted: 05/16/2010] [Indexed: 11/29/2022]
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Puscasiu L, Szabo B, Capalna M, Stolnicu S, Andrei S, Marginean C, Nedelcu M. O911 Markers of inflammation in the placenta and fetal membranes - A potential pathway to preterm birth. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)61284-4] [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: 10/20/2022]
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Szabo B, Capalna M, Szasz F, Esanu C, Rusu C, Toma A. P1107 Prognostic survival factors after Piver 3 radical hysterectomy for cervical cancer. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)62591-1] [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: 11/28/2022]
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Capilna M, Szabo B, Puscasiu L, Szasz F. P988 Para-aortic lymphadenectomy: when really is it worth to perform it? Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)62475-9] [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: 12/01/2022]
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Abstract
The CB1 cannabinoid receptor is widely distributed in the central and peripheral nervous system. Within the neuron, the CB1 receptor is often localised in axon terminals, and its activation leads to inhibition of transmitter release. The consequence is inhibition of neurotransmission via a presynaptic mechanism. Inhibition of glutamatergic, GABAergic, glycinergic, cholinergic, noradrenergic and serotonergic neurotransmission has been observed in many regions of the central nervous system. In the peripheral nervous system, CB1 receptor-mediated inhibition of adrenergic, cholinergic and sensory neuroeffector transmission has been frequently observed. It is characteristic for the ubiquitous operation of CB1 receptor-mediated presynaptic inhibition that antagonistic components of functional systems (for example, the excitatory and inhibitory inputs of the same neuron) are simultaneously inhibited by cannabinoids. Inhibition of voltage-dependent calcium channels, activation of potassium channels and direct interference with the synaptic vesicle release mechanism are all implicated in the cannabinoid-evoked inhibition of transmitter release. Many presynaptic CB1 receptors are subject to an endogenous tone, i.e. they are constitutively active and/or are continuously activated by endocannabinoids. Compared with the abundant data on presynaptic inhibition by cannabinoids, there are only a few examples for cannabinoid action on the somadendritic parts of neurons in situ.
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Affiliation(s)
- B Szabo
- Institut für Experimentelle und Klinische Pharmakologie und Toxikologie, Albert-Ludwigs-Universität, Albertstrasse 25, 79104 Freiburg, Germany.
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Freiman I, Szabo B. Cannabinoids depress excitatory neurotransmission between the subthalamic nucleus and the globus pallidus. Neuroscience 2005; 133:305-13. [PMID: 15893652 DOI: 10.1016/j.neuroscience.2005.01.058] [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] [Received: 10/14/2004] [Revised: 01/26/2005] [Accepted: 01/26/2005] [Indexed: 10/25/2022]
Abstract
The globus pallidus receives its major glutamatergic input from the subthalamic nucleus and subthalamic nucleus neurons synthesize CB1 cannabinoid receptors. The hypothesis of the present work was that CB1 receptors are localized in terminals of subthalamo-pallidal glutamatergic axons and that their activation leads to presynaptic modulation of neurotransmission between these axons and globus pallidus neurons. Patch-clamp studies were carried out on oblique-sagittal mouse brain slices. The subthalamic nucleus was stimulated electrically and the resulting excitatory postsynaptic currents (EPSCs) were recorded in globus pallidus neurons. The mixed CB1/CB2 receptor agonist R(+)-[2,3-dihydro-5-methyl-3-[(morpholinyl)methyl]pyrrolo[1,2,3-de]-1,4-benzoxazin-yl]-(1-naphthalenyl)methanone mesylate (WIN55212-2; 3 x 10(-7) M) had no effect on EPSCs. WIN55212-2 (10(-5) M) decreased the amplitude of EPSCs by 44+/-8%. The inhibition by WIN55212-2 (10(-5) M) was prevented by the CB1 antagonist N-piperidino-5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-3-pyrazolecarboxamide (10(-6) M). WIN55212-2 (10(-5) M) did not change the amplitude of spontaneous EPSCs (sEPSCs) recorded in globus pallidus neurons but lowered their frequency. Moreover, WIN55212-2 (10(-5) M) had no effect on currents elicited by direct activation of postsynaptic receptors on globus pallidus neurons by glutamate (10(-3) M) ejected from a pipette. In a final series of experiments, the firing of subthalamic nucleus neurons was recorded; WIN55212-2 (10(-5) M) did not change the firing of these neurons. The results show that activation of CB1 receptors inhibits glutamatergic neurotransmission between the subthalamic nucleus and the globus pallidus. Lack of effect of cannabinoids on the amplitude of sEPSCs and on currents evoked by direct stimulation of postsynaptic glutamate receptors indicates that the mechanism is presynaptic inhibition of glutamate release from axon terminals. Cannabinoids seem to act preferentially presynaptically: in contrast to their action on axon terminals, they have no effect on somadendritic receptors regulating firing rate. Cannabinoids elicit catalepsy in vivo. The observed inhibition of glutamatergic neurotransmission in the globus pallidus would favor catalepsy.
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Affiliation(s)
- I Freiman
- Institut für Experimentelle und Klinische Pharmakologie und Toxikologie, Albert-Ludwigs-Universität, Albertstrasse 25, D-79104 Freiburg i. Br., Germany
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Steffens M, Szabo B, Klar M, Rominger A, Zentner J, Feuerstein TJ. Modulation of electrically evoked acetylcholine release through cannabinoid CB1 receptors: evidence for an endocannabinoid tone in the human neocortex. Neuroscience 2003; 120:455-65. [PMID: 12890515 DOI: 10.1016/s0306-4522(03)00318-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [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: 11/22/2022]
Abstract
Cannabinoids are known to inhibit neurotransmitter release in the CNS through CB1 receptors. The present study compares the effects of synthetic cannabinoids on acetylcholine (ACh) release in human and mice neocortex. We further investigated a possible endocannabinoid tone on CB1 receptors in human neocortex caused by endogenous agonists like anandamide or 2-arachidonylglycerol. Brain slices, incubated with [3H]-choline, were superfused and stimulated electrically under autoinhibition-free conditions to evoke tritium overflow assumed to represent ACh release. The first series of experiments was performed with 26 pulses, 60 mA, at 0.1 Hz. In mice neocortical slices, the cannabinoid receptor agonist WIN55212-2 decreased ACh release (pIC50=6.68, I(max)=67%). In the human neocortex the concentration-response curve of WIN55212-2 was bell-shaped and flat (I(max observed) approximately 30%). The estimated maximum possible inhibition, however, was much larger: I(max derived)=79%. Lec, the negative logarithm (lg) of the biophase concentration of endocannabinoids in 'WIN55212-2 units,' was -6.52, the pKd of WIN55212-2 was 7.47. The CB1 receptor antagonist/inverse agonist SR141716 enhanced ACh release in the human neocortex (by 38%) and prevented the inhibitory effect of WIN55212-2. The concentration-response curve of WIN55212-2 was changed in its shape including a shift to the right due to the presence of SR141716. A pA2 of this antagonist between 11.60 and 11.18 was obtained. SR141716 alone had no effect in mice neocortical slices. A partial agonist without inverse agonistic activity, O-1184, enhanced ACh release in the human neocortex. The endocannabinoid uptake-inhibitor AM404 decreased ACh release in human, but not in mice, neocortical slices. Change of the stimulation parameters (eight trains of pseudo-one-pulse bursts (4 pulses, 76 mA, 100 Hz), spaced by 45 s intervals) led to a stronger inhibitory effect of WIN55212-2, and abolished the disinhibitory effect of SR141716 and O-1184. The results show that activation of CB1 cannabinoid receptors leads to inhibition of ACh release in the human and mouse neocortex. The endocannabinoid tone is high in the human, but not in the mouse neocortex and is dependent on neuronal activity. SR141716 acts as a competitive CB1 receptor antagonist.
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Affiliation(s)
- M Steffens
- Sektion Klinische Neuropharmakologie der Neurologischen Universitätsklinik, Neurozentrum, Breisacherstrasse 64, D-79106 Freiburg, Germany
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Vagts DA, Iber T, Szabo B, Haberstroh J, Reising K, Puccini M, Geiger K, Nöldge-Schomburg GFE. Effects of epidural anaesthesia on intestinal oxygenation in pigs. Br J Anaesth 2003; 90:212-20. [PMID: 12538379 DOI: 10.1093/bja/aeg039] [Citation(s) in RCA: 26] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Perioperative intestinal hypoperfusion is a major contributing factor leading to organ dysfunction. It can be caused by stress as a result of surgical manipulation or hypoxia. Additionally, anaesthesia can affect intestinal oxygenation. This animal study was designed to assess the effects of reduced regional sympathetic nervous activity induced by thoracic epidural anaesthesia on intestinal oxygenation. METHODS After ethical approval, 16 anaesthetized and acutely instrumented pigs were randomly assigned to two groups (epidural anaesthesia alone vs epidural anaesthesia plus volume loading). The epidural anaesthesia aimed for a T5-T12 block. Measurements were at baseline and after 1 and 2 h. RESULTS Epidural anaesthesia was associated with a decrease in mean arterial blood pressure and pronounced mesenteric vasodilatation. Mesenteric blood flow did not change. Intestinal oxygen uptake, mucosal tissue oxygen partial pressure and tissue carbon dioxide partial pressure remained unchanged. CONCLUSIONS Despite marked systemic hypotension, epidural anaesthesia did not affect intestinal oxygenation. There was no benefit obtained from volume loading.
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Affiliation(s)
- D A Vagts
- Anaesthesiologische Universitätsklinik Freiburg, Hugstetter Strasse 55, D-79106 Freiburg im Breisgau, Germany
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Abstract
The substantia nigra pars reticulata (SNR) belongs to the brain regions with the highest density of CB(1) cannabinoid receptors. Anatomical studies indicate that the great majority of CB(1) receptors in the SNR are localized on terminals of GABAergic axons arriving from the caudate-putamen (striatonigral axons). The aim of the present experiments was to clarify the role of CB(1) receptors on terminals of striatonigral axons. Oblique sagittal slices, including the caudate-putamen and the substantia nigra, were prepared from brains of young mice. Electrical stimulation in the caudate-putamen elicited GABAergic inhibitory postsynaptic currents (IPSCs) in the SNR, which were studied by patch-clamp techniques. The long latency of IPSCs (14+/-1 ms) suggests that striatonigral axons were indeed activated within the caudate-putamen. The synthetic CB(1)/CB(2) cannabinoid receptor agonist WIN55212-2 (R(+)-[2,3-dihydro-5-methyl-3-[(morpholinyl)methyl]pyrrolo[1,2,3-de]-1,4-benzoxazin-yl]-(1-naphthalenyl)methanone mesylate; 10(-5) M) decreased the amplitude of IPSCs by 93+/-1%. CP55940 ((-)-cis-3-[2-hydroxy-4-(1,1-dimethylheptyl)phenyl]-trans-4-(3-hydroxypropyl)cyclohexanol; 10(-5) M), another CB(1)/CB(2) receptor agonist, also reduced IPSC amplitude, by 76+/-4%. The CB(1) cannabinoid receptor antagonist SR141716A (N-piperidino-5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-3-pyrazole-carboxamide; 10(-6) M) prevented the inhibition produced by WIN55212-2 (10(-5) M). Depolarization of SNR neurons led to suppression of IPSCs; this suppression was prevented by SR141716A (10(-6) M). Three observations indicate that the agonists inhibited neurotransmission presynaptically. (1) CP55940 (10(-5) M) enhanced the ratio of amplitudes of two IPSCs which were elicited by two electrical stimuli 100 ms apart (paired pulses). (2) WIN55212-2 (10(-5) M) did not change the amplitude of miniature IPSCs recorded in the presence of tetrodotoxin. (3) WIN55212-2 (10(-5) M) also had no effect on currents elicited in SNR neurons by ejection of the GABA(A) receptor agonist muscimol from a pipet. In summary, we have established a method which allows selective examination of GABAergic neurotransmission between striatonigral axons and SNR neurons. Using this method, the function of CB(1) cannabinoid receptors on terminals of striatonigral axons was unequivocally clarified. Activation of these receptors causes strong presynaptic inhibition of GABAergic neurotransmission between striatonigral axons and SNR neurons. This effect may be one explanation of the catalepsy observed in animals after cannabinoid administration. Endocannabinoids released from SNR neurons can modulate striatonigral neurotransmission by inhibiting GABA release from terminals of striatonigral axons.
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Affiliation(s)
- I Wallmichrath
- Institut für Experimentelle und Klinische Pharmakologie und Toxikologie, Albert-Ludwigs-Universität, Albertstrasse 25, D-79104, Freiburg i Br, Germany
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Abstract
1. The objective of the present study was to analyse the peripheral effects of cannabinoids on adrenaline release from adrenal chromaffin cells. 2. In pithed rabbits with electrically stimulated sympathetic outflow, intravenous injection of the cannabinoid receptor agonists WIN55212-2 and CP55940 (5, 50 and 500 microg x kg(-1)) markedly lowered the plasma adrenaline concentration. The effect of WIN55212-2 was attenuated by the selective CB1 cannabinoid receptor antagonist SR141716A (500 microg x kg(-1)). WIN55212-3 (same doses as WIN55212-2), the enantiomer of WIN55212-2 lacking affinity for cannabinoid receptors, had no effect on the plasma adrenaline concentration. 3. In rabbit isolated adrenal glands, the release of adrenaline elicited by electrical stimulation was measured by fast cyclic voltammetry. Electrically-evoked adrenaline release was inhibited by WIN55212-2 (0.3, 1, 3 and 10 microM) and this effect was antagonized by SR141716A (1 microM). The non-cholinergic component of adrenaline release observed after blockade of nicotinic (by hexamethonium 100 microM) and muscarinic (by atropine 0.5 microM) acetylcholine receptors was not depressed by WIN55212-2. WIN55212-3 (10 microM) had no effect on adrenaline release. 4. No detectable specific CB1 receptor binding and mRNA expression were found in rabbit adrenal glands with autoradiography and in situ hybridization. 5. The results show that cannabinoids inhibit adrenaline secretion in rabbit isolated adrenal glands; the likely mechanism is a presynaptic CB1 receptor-mediated inhibition of acetylcholine release from preganglionic sympathetic neurons. The inhibition of adrenaline secretion in adrenal glands most probably accounts for the decrease in the plasma adrenaline concentration observed after cannabinoid administration in pithed rabbits.
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Affiliation(s)
- N Niederhoffer
- Institut für Experimentelle und Klinische Pharmakologie und Toxikologie, Albert-Ludwigs-Universität, Freiburg i. Br., Germany.
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Szabo B, Fritz T, Wedzony K. Effects of imidazoline antihypertensive drugs on sympathetic tone and noradrenaline release in the prefrontal cortex. Br J Pharmacol 2001; 134:295-304. [PMID: 11564647 PMCID: PMC1572948 DOI: 10.1038/sj.bjp.0704237] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [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: 11/09/2022] Open
Abstract
1. The aim of the present study was to compare the effects of the centrally acting antihypertensive drugs rilmenidine, moxonidine, clonidine and guanabenz on sympathetic tone with their effects on noradrenaline release in the cerebral cortex. In particular, the hypothesis was tested that rilmenidine and moxonidine, due to their high affinity for sympatho-inhibitory imidazoline I(1) receptors and low affinity for alpha(2)-adrenoceptors, lower sympathetic tone without causing an alpha(2)-adrenoceptor-mediated inhibition of cerebrocortical noradrenaline release. 2. In rats anaesthetized with urethane, blood pressure and heart rate were measured and the concentration of noradrenaline in arterial blood plasma was determined. The release of noradrenaline in the medial prefrontal cortex was estimated by microdialysis. Intravenous administration of rilmenidine (30, 100, 300 and 1000 microg kg(-1)), moxonidine (10, 30, 100 and 300 microg kg(-1)), clonidine (1, 3, 10 and 30 microg kg(-1)) and guanabenz (1, 3, 10 and 30 microg kg(-1)) led to dose-dependent hypotension and bradycardia; the plasma noradrenaline concentration also decreased. After the two highest doses, all four drugs lowered noradrenaline release in the prefrontal cortex. At doses eliciting equal hypotensive and sympatho-inhibitory responses, rilmenidine and moxonidine inhibited cerebral cortical noradrenaline release at least as much as clonidine and guanabenz. 3. The results show that rilmenidine and moxonidine lower cerebrocortical noradrenaline release at doses similar to those which cause sympatho-inhibition. This effect was probably due to an alpha(2)-adrenoceptor-mediated inhibition of the firing of locus coeruleus neurons and, in addition, to presynaptic inhibition of noradrenaline release at the level of the axon terminals in the cortex. The results argue against the hypothesis that rilmenidine and moxonidine, due to their selectivity for sympatho-inhibitory I(1) imidazoline receptors, do not suppress noradrenergic neurons in the central nervous system.
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Affiliation(s)
- B Szabo
- Institute of Experimental and Clinical Pharmacology and Toxicology, Albert Ludwigs University, Hermann-Herder-Strasse 5, D-79104 Freiburg i. Br., Germany.
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Szabo B, Nordheim U, Niederhoffer N. Effects of cannabinoids on sympathetic and parasympathetic neuroeffector transmission in the rabbit heart. J Pharmacol Exp Ther 2001; 297:819-26. [PMID: 11303075] [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: 02/19/2023] Open
Abstract
Cannabinoids elicit marked cardiovascular responses. It is not clear how peripheral effects on the autonomic nervous system contribute to these responses. The aim of the present study was to characterize the peripheral actions of cannabinoids on the autonomic innervation of the heart. Experiments were carried out on pithed rabbits. In the first series of experiments, postganglionic sympathetic cardioaccelerator fibers were stimulated electrically. The synthetic cannabinoid receptor agonists WIN55212-2 (0.005, 0.05, 0.5, and 1.5 mg kg(-1) i.v.) and CP55940 (0.003, 0.03, 0.3, and 1 mg kg(-1) i.v.) dose dependently inhibited the electrically evoked cardioacceleration. The inhibition by WIN55212-2 (0.5 mg kg(-1) i.v.) was prevented by the CB(1) cannabinoid receptor antagonist SR141716A (0.5 mg kg(-1) i.v.). WIN55212-2 (0.5 mg kg(-1) i.v.) did not change the increase in heart rate evoked by injection of isoprenaline. In the second series of experiments, preganglionic vagal fibers were stimulated electrically. WIN55212-2 (0.005, 0.05, and 0.5 mg kg(-1) i.v.) and CP55940 (0.003, 0.03, and 0.3 mg kg(-1) i.v.) dose dependently inhibited the stimulation-evoked decrease in heart rate. The inhibition produced by WIN55212-2 (0.005, 0.05, and 0.5 mg kg(-1) i.v.) was antagonized by SR141716A (0.5 mg kg(-1) i.v.). The results indicate that cannabinoids, by activating CB(1) cannabinoid receptors, inhibit sympathetic and vagal neuroeffector transmission in the heart. The mechanism of the sympathoinhibition is probably presynaptic inhibition of noradrenaline release from postganglionic sympathetic neurons. The mechanism of the inhibition of vagal activity was not clarified: cannabinoids may have an inhibitory action on both pre- and postganglionic vagal neurons.
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Affiliation(s)
- B Szabo
- Institut für Experimentelle und Klinische Pharmakologie und Toxikologie, Albert-Ludwigs-Universität, Freiburg, Germany.
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Nagykaldi Z, Kem D, Lazzara R, Szabo B. Conditioning of beta(1)-adrenoceptor effect via beta(2)-subtype on L-type Ca(2+) current in canine ventricular myocytes. Am J Physiol Heart Circ Physiol 2000; 279:H1329-37. [PMID: 10993800 DOI: 10.1152/ajpheart.2000.279.3.h1329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We investigated the roles of beta(1)- and beta(2)-receptors (beta-AR) in adrenergic enhancement of L-type Ca(2+) current (I(CaL)) in canine ventricular myocytes. Isoproterenol and l-norepinephrine produced a monophasic and a biphasic concentration-I(CaL) relationship (CR), respectively. alpha(1)-AR inhibition with prazosin and beta(2)-AR stimulation with zinterol or l-epinephrine shifted the CR of l-norepinephrine leftward. Zinterol (50 nM) and l-epinephrine (10 nM), but not prazosin, altered the biphasic CR of l-norepinephrine to a monophasic CR. Zinterol and l-epinephrine applied after l-norepinephrine had no effect on I(CaL). beta(2)-AR inhibition with ICI-118551 reduced the E(max) of isoproterenol and l-norepinephrine by 60% and abolished the augmentation of l-norepinephrine by zinterol and l-epinephrine. Carbachol (100 nM) modestly reduced the I(CaL) response to beta(1)-AR stimulation but abolished the enhancement via beta(2)-AR. Zinterol augmented the enhancement of I(CaL) by forskolin, IBMX, and theophylline, but not in the presence of CGP-20712A. We conclude that selective beta(2)-AR stimulation does not increase I(CaL) but enhances adenylyl cyclase activity when stimulated via beta(1)-AR and with forskolin. beta(2)-AR activity preconditions adenylyl cyclase for beta(1)-AR stimulation.
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Affiliation(s)
- Z Nagykaldi
- Section of Endocrinology, Department of Internal Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, USA
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Niederhoffer N, Szabo B. Cannabinoids cause central sympathoexcitation and bradycardia in rabbits. J Pharmacol Exp Ther 2000; 294:707-13. [PMID: 10900251] [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: 02/17/2023] Open
Abstract
Systemically administered cannabinoids elicit marked cardiovascular effects, and the role of the central and the peripheral nervous system in these effects is not clarified. The aim of this study was to characterize the actions of cannabinoids on cardiovascular regulatory centers in conscious rabbits. A catheter for administration of drugs into the cisterna cerebellomedullaris and an electrode for recording renal sympathetic nerve activity were implanted under halothane anesthesia. Experiments were carried out later in conscious animals. Two cannabinoid receptor agonists were injected intracisternally: the aminoalkylindole WIN55212-2 (0.1, 1, and 10 microg kg(-1)) and the bicyclic Delta(9)-tetrahydrocannabinol analog CP55940 (0.1, 1, and 10 microg kg(-1)). WIN55212-2 and CP55940 dose dependently increased renal sympathetic nerve activity and the plasma noradrenaline concentration and also lowered the heart rate. The highest doses of WIN55212-2 and CP55940 increased blood pressure. In contrast, intracisternal injection of WIN55212-3 (0.1, 1, and 10 microg kg(-1)), an enantiomer of WIN55212-2 with very low affinity for cannabinoid binding sites, had no effects. The CB(1) cannabinoid receptor antagonist SR141716A (0.5 mg kg(-1), i.v. ) attenuated the effects of intracisternally administered WIN55212-2 (0.1, 1, and 10 microg kg(-1)). The results indicate that cannabinoids, acting directly on cardiovascular regulatory centers, elicit sympathoactivation and bradycardia. These effects were likely mediated by CB(1) cannabinoid receptors, because they were elicited by two cannabinoid agonists belonging to different chemical classes (WIN55212-2 and CP55940), but not by the inactive enantiomer WIN55212-3, and because they were attenuated by the CB(1) cannabinoid receptor antagonist SR141716A.
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Affiliation(s)
- N Niederhoffer
- Institut für Pharmakologie und Toxikologie, Albert-Ludwigs-Universität, Freiburg, Germany
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Abstract
The substantia nigra pars reticulata belongs to the brain regions with the highest density of CB(1) cannabinoid receptors. Since the level of CB(1) receptor messenger RNA is very low in the pars reticulata, most of the receptors are probably localized on terminals of afferent axons. The hypothesis was tested that terminals of glutamatergic afferents of substantia nigra pars reticulata neurons possess CB(1) cannnabinoid receptors, the activation of which presynaptically modulates neurotransmission. Rat midbrain slices were superfused and the electrophysiological properties of substantia nigra pars reticulata neurons were studied with the patch-clamp technique. Focal electrical stimulation in the presence of bicuculline evoked excitatory postsynaptic currents mediated by alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionate (AMPA)/kainate glutamate receptors. The excitatory postsynaptic currents were reduced by the metabotropic glutamate receptor agonist (+/-)-1-aminocyclopentane-trans-1,3-dicarboxylic acid (trans-ACPD; 10(-4)M). The mixed CB(1)/CB(2) cannabinoid receptor agonists R(+)-[2,3-dihydro-5-methyl-3-[(morpholinyl)methyl]pyrrolo[1,2, 3-de]-1,4-benzoxazin-yl]-(1-naphthalenyl)methanone (WIN55212-2; 10(-8)-10(-5)M) and (-)-cis-3-[2-hydroxy-4-(1, 1-dimethylheptyl)phenyl]-trans-4-(3-hydroxypropyl)cyclohexanol (CP55940; 10(-6)M) also produced inhibition. The maximal inhibition by WIN55212-2 was 54+/-6%. The CB(1) cannabinoid antagonist N-piperidino-5-(4-chlorophenyl)-1-(2, 4-dichlorophenyl)-4-methyl-3-pyrazole-carboxamide (SR141716A; 10(-6)M) prevented the effect of WIN55212-2, but had no effect when superfused alone. WIN55212-2 (10(-6)M) increased the amplitude ratio of two excitatory postsynaptic currents evoked with an interstimulus interval of 100ms. Currents evoked by short ejection of glutamate on to the surface of the slices were not changed by WIN55212-2. The results show that activation of CB(1) cannabinoid receptors inhibits glutamatergic synaptic transmission between afferent axons and neurons in the substantia nigra pars reticulata. The lack of effect of the cannabinoids on glutamate-evoked currents and the increase of the paired-pulse ratio indicate that the mechanism of action is presynaptic inhibition of transmitter release.
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Affiliation(s)
- B Szabo
- Institut für Pharmakologie und Toxikologie, Albert-Ludwigs-Universität, D-79104, Freiburg, Germany
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Volders PG, Vos MA, Szabo B, Sipido KR, de Groot SH, Gorgels AP, Wellens HJ, Lazzara R. Progress in the understanding of cardiac early afterdepolarizations and torsades de pointes: time to revise current concepts. Cardiovasc Res 2000; 46:376-92. [PMID: 10912449 DOI: 10.1016/s0008-6363(00)00022-5] [Citation(s) in RCA: 229] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Affiliation(s)
- P G Volders
- Department of Cardiology, Cardiovascular Research Institute Maastricht, Academic Hospital Maastricht, The Netherlands.
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