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Üveges B, Kalina C, Szabó K, Móricz ÁM, Holly D, Gabor CR, Hettyey A, Bókony V. Does the Glucocorticoid Stress Response Make Toads More Toxic? An Experimental Study on the Regulation of Bufadienolide Toxin Synthesis. Integr Org Biol 2023; 5:obad021. [PMID: 37435008 PMCID: PMC10331804 DOI: 10.1093/iob/obad021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 05/15/2023] [Accepted: 06/02/2023] [Indexed: 07/13/2023] Open
Abstract
Chemical defense is a crucial component of fitness in many organisms, yet the physiological regulation of defensive toxin synthesis is poorly understood, especially in vertebrates. Bufadienolides, the main defensive compounds of toads, are toxic to many predators and other natural enemies, and their synthesis can be upregulated by stressors, including predation risk, high conspecific density, and pollutants. Thus, higher toxin content may be the consequence of a general endocrine stress response in toads. Therefore, we hypothesized that bufadienolide synthesis may be stimulated by elevated levels of corticosterone (CORT), the main glucocorticoid hormone of amphibians, or by upstream regulators that stimulate CORT production. To test these alternatives, we treated common toad tadpoles with exogenous CORT (exoCORT) or metyrapone (MTP, a CORT-synthesis inhibitor that stimulates upstream regulators of CORT by negative feedback) in the presence or absence of predation cues for 2 or 6 days, and subsequently measured their CORT release rates and bufadienolide content. We found that CORT release rates were elevated by exoCORT, and to a lesser extent also by MTP, regardless of treatment length. Bufadienolide content was significantly decreased by treatment with exoCORT for 6 days but was unaffected by exposure to exoCORT for 2 days or to MTP for either 6 or 2 days. The presence or absence of predation cues affected neither CORT release rate nor bufadienolide content. Our results suggest that changes in bufadienolide synthesis in response to environmental challenges are not driven by CORT but may rather be regulated by upstream hormones of the stress response.
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Affiliation(s)
| | - C Kalina
- Department of Evolutionary Ecology, Plant Protection Institute, Centre for Agricultural Research, Eötvös Loránd Research Network, Herman Ottó út 15, 1022 Budapest, Hungary
- Department of Ecology, Institute of Biology, University of Veterinary Medicine, István u. 2, 1078 Budapest, Hungary
| | - K Szabó
- Division of Clinical Immunology, Department for Internal Medicine, Faculty of Medicine, University of Debrecen, Móricz Zsigmond út 22, 4032 Debrecen, Hungary
| | - Á M Móricz
- Department of Pathophysiology, Plant Protection Institute, Centre for Agricultural Research, Eötvös Loránd Research Network, Herman Ottó út 15, 1022 Budapest, Hungary
| | - D Holly
- Department of Evolutionary Ecology, Plant Protection Institute, Centre for Agricultural Research, Eötvös Loránd Research Network, Herman Ottó út 15, 1022 Budapest, Hungary
| | - C R Gabor
- Department of Evolutionary Ecology, Plant Protection Institute, Centre for Agricultural Research, Eötvös Loránd Research Network, Herman Ottó út 15, 1022 Budapest, Hungary
- Department of Biology, College of Science and Engineering, Texas State University, 601 University Dr., San Marcos, TX 78666, USA
| | - A Hettyey
- Department of Evolutionary Ecology, Plant Protection Institute, Centre for Agricultural Research, Eötvös Loránd Research Network, Herman Ottó út 15, 1022 Budapest, Hungary
| | - V Bókony
- Department of Evolutionary Ecology, Plant Protection Institute, Centre for Agricultural Research, Eötvös Loránd Research Network, Herman Ottó út 15, 1022 Budapest, Hungary
- Department of Ecology, Institute of Biology, University of Veterinary Medicine, István u. 2, 1078 Budapest, Hungary
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2
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Balogh F, Erdei L, Bolla B, Takács A, Burián K, Kemény L, Szabó K. 406 Investigating the role of Cutibacterium acnes in the development of postinflammatory hyperpigmentation (PIH). J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.419] [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: 11/19/2022]
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3
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Vincze O, Vágási CI, Pénzes J, Szabó K, Magonyi NM, Czirják GÁ, Pap PL. Sexual dimorphism in immune function and oxidative physiology across birds: The role of sexual selection. Ecol Lett 2022; 25:958-970. [PMID: 35106902 PMCID: PMC9305230 DOI: 10.1111/ele.13973] [Citation(s) in RCA: 7] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 01/05/2022] [Accepted: 01/05/2022] [Indexed: 01/08/2023]
Abstract
Sex‐specific physiology is commonly reported in animals, often indicating lower immune indices and higher oxidative stress in males than in females. Sexual selection is argued to explain these differences, but empirical evidence is limited. Here, we explore sex differences in immunity, oxidative physiology and packed cell volume of wild, adult, breeding birds (97 species, 1997 individuals, 14 230 physiological measurements). We show that higher female immune indices are most common across birds (when bias is present), but oxidative physiology shows no general sex‐bias and packed cell volume is generally male‐biased. In contrast with predictions based on sexual selection, male‐biased sexual size dimorphism is associated with male‐biased immune measures. Sexual dichromatism, mating system and parental roles had no effect on sex‐specificity in physiology. Importantly, female‐biased immunity remained after accounting for sexual selection indices. We conclude that cross‐species differences in physiological sex‐bias are largely unrelated to sexual selection and alternative explanations should be explored.
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Affiliation(s)
- Orsolya Vincze
- Centre for Ecological Research, Institute of Aquatic Ecology, Debrecen, Hungary.,Evolutionary Ecology Group, Hungarian Department of Biology and Ecology, Babeş-Bolyai University, Cluj-Napoca, Romania
| | - Csongor I Vágási
- Evolutionary Ecology Group, Hungarian Department of Biology and Ecology, Babeş-Bolyai University, Cluj-Napoca, Romania
| | - Janka Pénzes
- Evolutionary Ecology Group, Hungarian Department of Biology and Ecology, Babeş-Bolyai University, Cluj-Napoca, Romania
| | - Krisztián Szabó
- Department of Ecology, University of Veterinary Medicine Budapest, Budapest, Hungary
| | - Nóra M Magonyi
- Doctoral School of Biology and Sportbiology, Faculty of Sciences, University of Pécs, Pécs, Hungary.,Centre for Agricultural Research, Plant Protection Institute, ELKH, Budapest, Hungary
| | - Gábor Á Czirják
- Department of Wildlife Diseases, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Péter L Pap
- Evolutionary Ecology Group, Hungarian Department of Biology and Ecology, Babeş-Bolyai University, Cluj-Napoca, Romania.,Behavioural Ecology Research Group, Department of Evolutionary Zoology and Human Biology, University of Debrecen, Debrecen, Hungary
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4
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Vörös J, Varga Z, Martínez-Solano I, Szabó K. Mitochondrial DNA diversity of the alpine newt (Ichthyosaura alpestris) in the Carpathian Basin: evidence for multiple cryptic lineages associated with Pleistocene refugia. ACTA ZOOL ACAD SCI H 2021. [DOI: 10.17109/azh.67.2.177.2021] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The phylogeography and molecular taxonomy of the Alpine newt, Ichthyosaura alpestris, has been intensively studied in the past. However, previous studies did not include a comprehensive sampling from the Carpathian Basin, possibly a key region in the evolution of the species. We used a 1251 bp long fragment of the mitochondrial genome to infer the species’ evolutionary history in central-eastern Europe by assigning isolated Carpathian Basin populations from 6 regions to previously defined mtDNA lineages. We also revised the morphology-based intraspecific taxonomy of the species in the light of new genetic data. Alpine newt populations from the Carpathian Basin represented two different mitochondrial lineages. The Mátra, Bükk and Zemplén Mts populations can be assigned to the Western lineage of the nominotypical subspecies. Bakony and Őrség populations showed high haplotype diversity and formed a separate clade within the Western lineage, suggesting that the Carpathian Basin might have provided cryptic refugia for Alpine newt populations in their cold-continental forest-steppe landscapes during the younger Pleistocene. Newts from Apuseni Mts were related to the Eastern lineage but formed a distinct clade within this lineage. Considering the morphological and genetic differentiation of the Bakony and Őrség populations, consistent with a long independent evolutionary history, we propose these populations be referred to as Ichthyosaura alpestris bakonyiensis (Dely, 1964). We provide a redescription of this poorly known subspecies.
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5
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Kemény L, Szabó K. Commentary on 'Sebocyte differentiation as a new target for acne therapy: an in vivo experience'. J Eur Acad Dermatol Venereol 2020; 34:1637-1638. [PMID: 32735074 DOI: 10.1111/jdv.16788] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 06/22/2020] [Indexed: 01/31/2023]
Affiliation(s)
- L Kemény
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary.,HCEMM-SZTE Skin Research Group, Szeged, Hungary.,MTA-SZTE Dermatological Research Group, Szeged, Hungary
| | - K Szabó
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary.,HCEMM-SZTE Skin Research Group, Szeged, Hungary.,MTA-SZTE Dermatological Research Group, Szeged, Hungary
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6
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Ágh N, Pipoly I, Szabó K, Vincze E, Bókony V, Seress G, Liker A. Does offspring sex ratio differ between urban and forest populations of great tits (Parus major)? Biol Futur 2020; 71:99-108. [PMID: 34554536 DOI: 10.1007/s42977-020-00024-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 09/25/2019] [Accepted: 06/01/2020] [Indexed: 10/24/2022]
Abstract
Since male and female offspring may have different costs and benefits, parents may use sex ratio adjustment to increase their own fitness under different environmental conditions. Urban habitats provide poorer conditions for nestling development in many birds. Therefore, we investigated whether great tits (Parus major) produce different brood sex ratios in urban and natural habitats. We determined the sex of nestlings of 126 broods in two urban and two forest sites between 2012 and 2014 by molecular sexing. We found that brood sex ratio did not differ significantly between urban and forest habitats either at egg-laying or near fledging. Male offspring were larger than females in both habitats. This latter result suggests that male offspring may be more costly to raise than females, yet our findings suggest that urban great tits do not produce more daughters despite the unfavourable breeding conditions. This raises the possibility that other aspects of urban life, such as better post-fledging survival, might favour males and thereby compensate for the extra energetic costs of producing male offspring.
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Affiliation(s)
- Nóra Ágh
- MTA-PE Evolutionary Ecology Research Group, Department of Limnology, University of Pannonia, Veszprém, Hungary.
| | - Ivett Pipoly
- MTA-PE Evolutionary Ecology Research Group, Department of Limnology, University of Pannonia, Veszprém, Hungary
| | - Krisztián Szabó
- Conservation Genetic Research Group, Institute of Biology, University of Veterinary Medicine Budapest, Budapest, Hungary
| | - Ernő Vincze
- MTA-PE Evolutionary Ecology Research Group, Department of Limnology, University of Pannonia, Veszprém, Hungary
| | - Veronika Bókony
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Budapest, Hungary
| | - Gábor Seress
- MTA-PE Evolutionary Ecology Research Group, Department of Limnology, University of Pannonia, Veszprém, Hungary
| | - András Liker
- MTA-PE Evolutionary Ecology Research Group, Department of Limnology, University of Pannonia, Veszprém, Hungary
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7
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Piross IS, Solt S, Horváth É, Kotymán L, Palatitz P, Bertók P, Szabó K, Vili N, Vas Z, Rózsa L, Harnos A, Fehérvári P. Sex-dependent changes in the louse abundance of red-footed falcons (Falco vespertinus). Parasitol Res 2020; 119:1327-1335. [PMID: 32179987 PMCID: PMC7176593 DOI: 10.1007/s00436-020-06634-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 12/03/2019] [Accepted: 02/18/2020] [Indexed: 11/15/2022]
Abstract
Permanent ectoparasites live in stable environments; thus, their population dynamics are mostly adapted to changes in the host life cycle. We aimed to investigate how static and dynamic traits of red-footed falcons interplay with the dynamics of their louse subpopulations during breeding and how they affect the colonisation of new hosts by lice. We sampled red-footed falcon (Falco vespertinus) nestlings (two breeding seasons) and adults (one breeding season) in southern Hungary. The mean abundance of Colpocephalum subzerafae and Degeeriella rufa lice on the nestlings was modelled with generalized linear mixed models using clutch size and host sex in interaction with wing length. For adults, we used wing length and the number of days after laying the first egg, both in interaction with sex. D. rufa abundances increased with the nestlings' wing length. In one year, this trend was steeper on females. In adult birds, both louse species exhibited higher abundances on females at the beginning, but it decreased subsequently through the breeding season. Contrarily, abundances were constantly low on adult males. Apparently, D. rufa postpones transmission until nestlings develop juvenile plumage and choose the more feathered individual among siblings. The sexual difference in the observed abundance could either be caused by the different plumage, or by the females' preference for less parasitized males. Moreover, females likely have more time to preen during the incubation period, lowering their louse burdens. Thus, sex-biased infestation levels likely arise due to parasite preferences in the nestlings and host behavioural processes in the adult falcons.
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Affiliation(s)
- Imre Sándor Piross
- Department of Biomathematics and Informatics, University of Veterinary Medicine, Budapest, Hungary
- Balaton Limnological Institute, MTA Centre for Ecological Research, Tihany, Hungary
| | - Szablocs Solt
- MME BirdLife Hungary, Red-footed Falcon Workgroup, Budapest, Hungary
| | - Éva Horváth
- MME BirdLife Hungary, Red-footed Falcon Workgroup, Budapest, Hungary
| | | | - Péter Palatitz
- MME BirdLife Hungary, Red-footed Falcon Workgroup, Budapest, Hungary
| | | | - Krisztián Szabó
- Conservation Genetics Research Group, Department of Ecology, Institute for Biology, University of Veterinary Medicine, Budapest, Hungary
| | - Nóra Vili
- Conservation Genetics Research Group, Department of Ecology, Institute for Biology, University of Veterinary Medicine, Budapest, Hungary
| | - Zoltán Vas
- Hungarian Natural History Museum, Budapest, Hungary
| | - Lajos Rózsa
- GINOP Evolutionary Systems Research Group, Institute of Evolution, MTA Centre for Ecological Research, Tihany, Hungary
| | - Andrea Harnos
- Department of Biomathematics and Informatics, University of Veterinary Medicine, Budapest, Hungary
| | - Péter Fehérvári
- Department of Biomathematics and Informatics, University of Veterinary Medicine, Budapest, Hungary.
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8
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Bozó R, Szél E, Danis J, Gubán B, Bata-Csorgo Z, Szabó K, Kemény L, Groma G. 410 Cartilage oligomeric matrix protein (COMP) negatively influences keratinocyte proliferation via α5β1-integrin: Potential relevance of altered COMP expression in psoriasis. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.412] [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: 10/26/2022]
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9
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Magonyi NM, Mátics R, Szabó K, Fehérvári P, Solt S, Palatitz P, Vili N. Characterization of novel microsatellite markers for the red-footed falcon (Falco vespertinus) and cross-species amplification in other Falco species. EUR J WILDLIFE RES 2019. [DOI: 10.1007/s10344-019-1300-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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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10
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Pipoly I, Szabó K, Bókony V, Preiszner B, Seress G, Vincze E, Schroeder J, Liker A. Higher Frequency of Extra-Pair Offspring in Urban Than Forest Broods of Great Tits (Parus major). Front Ecol Evol 2019. [DOI: 10.3389/fevo.2019.00229] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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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11
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Bernáth G, Csenki Z, Bokor Z, Várkonyi L, Molnár J, Szabó T, Staszny Á, Ferincz Á, Szabó K, Urbányi B, Pap L, Csorbai B. The effects of different preservation methods on ide (Leuciscus idus) sperm and the longevity of sperm movement. Cryobiology 2018; 81:125-131. [DOI: 10.1016/j.cryobiol.2018.01.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 01/26/2018] [Accepted: 01/28/2018] [Indexed: 12/16/2022]
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12
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Nemesházi E, Szabó K, Horváth Z, Kövér S. Genetic structure confirms female-biased natal dispersal in the White-tailed Eagle population of the Carpathian Basin. ACTA ZOOL ACAD SCI H 2018. [DOI: 10.17109/azh.64.3.243.2018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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13
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Erdei L, Bolla B, Tax G, Urbán E, Kemény L, Szabó K. 457 Identification of TNFAIP3 as negative regulator of Propionibacterium acnes-induced TLR signaling events in human epidermal keratinocytes. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.07.653] [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: 10/18/2022]
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14
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Manczinger M, Bodnár VÁ, Papp BT, Bolla SB, Szabó K, Balázs B, Csányi E, Szél E, Erős G, Kemény L. Drug Repurposing by Simulating Flow Through Protein-Protein Interaction Networks. Clin Pharmacol Ther 2017. [PMID: 28643328 PMCID: PMC5836852 DOI: 10.1002/cpt.769] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
As drug development is extremely expensive, the identification of novel indications for in‐market drugs is financially attractive. Multiple algorithms are used to support such drug repurposing, but highly reliable methods combining simulation of intracellular networks and machine learning are currently not available. We developed an algorithm that simulates drug effects on the flow of information through protein–protein interaction networks, and used support vector machine to identify potentially effective drugs in our model disease, psoriasis. Using this method, we screened about 1,500 marketed and investigational substances, identified 51 drugs that were potentially effective, and selected three of them for experimental confirmation. All drugs inhibited tumor necrosis factor alpha‐induced nuclear factor kappa B activity in vitro, suggesting they might be effective for treating psoriasis in humans. Additionally, these drugs significantly inhibited imiquimod‐induced ear thickening and inflammation in the mouse model of the disease. All results suggest high prediction performance for the algorithm.
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Affiliation(s)
- M Manczinger
- Department of Dermatology and Allergology, University of Szeged, Hungary.,MTA-SZTE Dermatological Research Group, University of Szeged, Hungary
| | - V Á Bodnár
- Department of Dermatology and Allergology, University of Szeged, Hungary
| | - B T Papp
- Department of Dermatology and Allergology, University of Szeged, Hungary.,Szeged Scientists Academy, Hungary
| | - S B Bolla
- Department of Dermatology and Allergology, University of Szeged, Hungary
| | - K Szabó
- Department of Dermatology and Allergology, University of Szeged, Hungary.,MTA-SZTE Dermatological Research Group, University of Szeged, Hungary
| | - B Balázs
- Department of Pharmaceutical Technology, University of Szeged, Hungary
| | - E Csányi
- Department of Pharmaceutical Technology, University of Szeged, Hungary
| | - E Szél
- Department of Dermatology and Allergology, University of Szeged, Hungary
| | - G Erős
- Department of Dermatology and Allergology, University of Szeged, Hungary
| | - L Kemény
- Department of Dermatology and Allergology, University of Szeged, Hungary.,MTA-SZTE Dermatological Research Group, University of Szeged, Hungary
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15
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Bókony V, Pipoly I, Szabó K, Preiszner B, Vincze E, Papp S, Seress G, Hammer T, Liker A. Innovative females are more promiscuous in great tits (Parus major). Behav Ecol 2017. [DOI: 10.1093/beheco/arx001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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16
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Szabó K, Erdei L, Bolla BS, Tax G, Bíró T, Kemény L. Factors shaping the composition of the cutaneous microbiota. Br J Dermatol 2017; 176:344-351. [PMID: 27518483 DOI: 10.1111/bjd.14967] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/03/2016] [Indexed: 12/12/2022]
Abstract
From birth, we are constantly exposed to bacteria, fungi and viruses, some of which are capable of transiently or permanently inhabiting our different body parts as our microbiota. The majority of our microbial interactions occur during and after birth, and several different factors, including age, sex, genetic constitution, environmental conditions and lifestyle, have been suggested to shape the composition of this microbial community. Propionibacterium acnes is one of the most dominant lipophilic microbes of the postadolescent, sebum-rich human skin regions. Currently, the role of this bacterium in the pathogenesis of the most common inflammatory skin disease, acne vulgaris, is a topic of intense scientific debate. Recent results suggest that Westernization strongly increases the dominance of the Propionibacterium genus in human skin compared with natural populations living more traditional lifestyles. According to the disappearing microbiota hypothesis proposed by Martin Blaser, such alterations in the composition of our microbiota are the possible consequences of socioeconomic and lifestyle changes occurring after the industrial revolution. Evanescence of species that are important elements of the human ecosystem might lead to the overgrowth and subsequent dominance of others because of the lack of ecological competition. Such changes can disturb the fine-tuned balance of the human body and, accordingly, our microbes developed through a long co-evolutionary process. These processes might lead to the transformation of a seemingly harmless species into an opportunistic pathogen through bacterial dysbiosis. This might have happened in the case of P. acnes in acne pathogenesis.
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Affiliation(s)
- K Szabó
- MTA-SZTE Dermatological Research Group, Szeged, Hungary
| | - L Erdei
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
| | - B Sz Bolla
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
| | - G Tax
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
| | - T Bíró
- DE-MTA 'Lendület' Cellular Physiology Research Group, Departments of Physiology and Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - L Kemény
- MTA-SZTE Dermatological Research Group, Szeged, Hungary.,Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
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17
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Harnos A, Lang Z, Petrás D, Bush SE, Szabó K, Rózsa L. Size matters for lice on birds: Coevolutionary allometry of host and parasite body size. Evolution 2017; 71:421-431. [PMID: 27925167 DOI: 10.1111/evo.13147] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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: 03/01/2016] [Revised: 10/26/2016] [Accepted: 10/31/2016] [Indexed: 11/27/2022]
Abstract
Body size is one of the most fundamental characteristics of all organisms. It influences physiology, morphology, behavior, and even interspecific interactions such as those between parasites and their hosts. Host body size influences the magnitude and variability of parasite size according to Harrison's rule (HR: positive relationship between host and parasite body sizes) and Poulin's Increasing Variance Hypothesis (PIVH: positive relationship between host body size and the variability of parasite body size). We analyzed parasite-host body size allometry for 581 species of avian lice (∼15% of known diversity) and their hosts. We applied phylogenetic generalized least squares (PGLS) methods to account for phylogenetic nonindependence controlling for host and parasite phylogenies separately and variance heterogeneity. We tested HR and PIVH for the major families of avian lice (Ricinidae, Menoponidae, Philopteridae), and for distinct ecological guilds within Philopteridae. Our data indicate that most families and guilds of avian lice follow both HR and PIVH; however, ricinids did not follow PIVH and the "body lice" guild of philopterid lice did not follow HR or PIVH. We discuss mathematical and ecological factors that may be responsible for these patterns, and we discuss the potential pervasiveness of these relationships among all parasites on Earth.
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Affiliation(s)
- Andrea Harnos
- Department of Biomathematics and Informatics, University of Veterinary Medicine Budapest, István u. 2, H-1078, Budapest, Hungary
| | - Zsolt Lang
- Department of Biomathematics and Informatics, University of Veterinary Medicine Budapest, István u. 2, H-1078, Budapest, Hungary
| | - Dóra Petrás
- Department of Biomathematics and Informatics, University of Veterinary Medicine Budapest, István u. 2, H-1078, Budapest, Hungary
| | - Sarah E Bush
- Department of Biology, University of Utah, 257 South 1400 East, Salt Lake City, Utah, 84112
| | - Krisztián Szabó
- Department of Ecology, University of Veterinary Medicine Budapest, Rottenbiller u. 50, H-1077, Budapest, Hungary
| | - Lajos Rózsa
- MTA-ELTE-MTM Ecology Research Group, Hungarian Academy of Sciences, Pázmány s. 1/C, H-1117, Budapest, Hungary
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18
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Vörös J, Ursenbacher S, Kiss I, Jelić D, Schweiger S, Szabó K. Increased genetic structuring of isolatedSalamandra salamandrapopulations (Caudata: Salamandridae) at the margins of the Carpathian Mountains. J ZOOL SYST EVOL RES 2016. [DOI: 10.1111/jzs.12157] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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)
- Judit Vörös
- Department of Zoology; Hungarian Natural History Museum; Budapest Hungary
- Laboratory for Molecular Taxonomy; Hungarian Natural History Museum; Budapest Hungary
| | - Sylvain Ursenbacher
- Department of Environmental Science Section of Conservation Biology; University of Basel; Basel Switzerland
| | - István Kiss
- Department of Zoology and Animal Ecology; Szent István University; Gödöllő Hungary
| | - Dušan Jelić
- Croatian Institute for Biodiversity; Zagreb Croatia
| | | | - Krisztián Szabó
- Department of Ecology; University of Veterinary Medicine; Budapest Hungary
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Bolla B, Erdei L, Tax G, Urbán E, Kemény L, Szabó K. 110 Studying the effect of Propionibacterium acnes bacterium on the barrier properties of the skin. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.06.128] [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: 11/29/2022]
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Erdei L, Bolla B, Tax G, Urbán E, Kemény L, Szabó K. 350 Anti-inflammatory role of TNIP1 in the Propionibacterium acnes -induced signaling events in human epidermal keratinocytes. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.06.370] [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: 10/21/2022]
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Varga L, Engel R, Szabó K, Abrankó L, Gosztola B, Zámboriné Németh É, Sárosi S. Seasonal Variation in Phenolic Content and Antioxidant Activity ofGlechoma HederaceaL. Harvested from Six Hungarian Populations. Acta Alimentaria 2016. [DOI: 10.1556/066.2016.45.2.14] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Szabó K, Papp G, Szántó A, Tarr T, Zeher M. A comprehensive investigation on the distribution of circulating follicular T helper cells and B cell subsets in primary Sjögren's syndrome and systemic lupus erythematosus. Clin Exp Immunol 2015; 183:76-89. [PMID: 26358223 DOI: 10.1111/cei.12703] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/09/2015] [Indexed: 01/09/2023] Open
Abstract
Follicular T helper (Tfh) cells have a crucial role in regulating immune responses within secondary lymphoid follicles by directing B cell differentiation towards memory B cells and plasma cells. Because abnormal humoral responses are key features in both primary Sjögren's syndrome (pSS) and systemic lupus erythematosus (SLE), the aim of this study was to profile the pathological connection between peripheral Tfh cells and B cells in the two diseases. Twenty-five pSS patients, 25 SLE patients and 21 healthy controls were enrolled into the study. We determined the ratio of circulating Tfh-like cells, their interleukin (IL)-21 production and different B cell subsets by flow cytometry. We observed higher percentages of naive B cells in both diseases, while non-switched and switched memory B cells showed decreased frequencies. The proportions of double-negative B cells and plasmablasts were elevated in SLE and decreased in pSS. The percentages of transitional B cells and mature-naive B cells were higher in SLE. Patients with more severe disease course had an elevated ratio of TFH-like cells and increased IL-21 production. Moreover, expansion of Tfh-like cells correlated positively with parameters related to antibody secretion, including serum immunoglobulin (Ig)G, immune complexes (ICs) and autoantibodies. Correlation analysis between Tfh-like cells and certain B cell subsets revealed possible defects during B cell selection. In conclusion, our observations on the profound expansion of circulating Tfh-like cells and their IL-21 production, along with the characteristic aberrant peripheral B cell distribution in both pSS and SLE, indicate the prominent role of Tfh cell in the regulation of B cell selection.
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Affiliation(s)
- K Szabó
- Division of Clinical Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - G Papp
- Division of Clinical Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - A Szántó
- Division of Clinical Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - T Tarr
- Division of Clinical Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - M Zeher
- Division of Clinical Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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Szél E, Polyánka H, Szabó K, Hartmann P, Degovics D, Balázs B, Németh IB, Korponyai C, Csányi E, Kaszaki J, Dikstein S, Nagy K, Kemény L, Erős G. Anti-irritant and anti-inflammatory effects of glycerol and xylitol in sodium lauryl sulphate-induced acute irritation. J Eur Acad Dermatol Venereol 2015; 29:2333-41. [PMID: 26370610 DOI: 10.1111/jdv.13225] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 05/21/2015] [Indexed: 11/27/2022]
Abstract
BACKGROUND Glycerol is known to possess anti-irritant and hydrating properties and previous studies suggested that xylitol may also have similar effects. OBJECTIVE Our aim was to study whether different concentrations of these polyols restore skin barrier function and soothe inflammation in sodium lauryl sulphate (SLS)-induced acute irritation. METHODS The experiments were performed on male SKH-1 hairless mice. The skin of the dorsal region was exposed to SLS (5%) for 3 h alone or together with 5% or 10% of glycerol respectively. Further two groups received xylitol solutions (8.26% and 16.52% respectively) using the same osmolarities, which were equivalent to those of the glycerol treatments. The control group was treated with purified water. Transepidermal water loss (TEWL) and skin hydration were determined. Microcirculatory parameters of inflammation were observed by means of intravital videomicroscopy (IVM). Furthermore, accumulation of neutrophil granulocytes and lymphocytes, the expression of inflammatory cytokines and SLS penetration were assessed, as well. RESULTS Treatment with the 10% of glycerol and both concentrations of xylitol inhibited the SLS-induced elevation of TEWL and moderated the irritant-induced increase in dermal blood flow and in the number of leucocyte-endothelial interactions. All concentrations of the applied polyols improved hydration and prevented the accumulation of lymphocytes near the treatment site. At the mRNA level, neither glycerol nor xylitol influenced the expression of interleukin-1 alpha. However, expression of interleukin-1 beta was significantly decreased by the 10% glycerol treatment, while expression of tumour necrosis factor-alpha decreased upon the same treatment, as well as in response to xylitol. Higher polyol treatments decreased the SLS penetration to the deeper layers of the stratum corneum. CONCLUSION Both of the analysed polyols exert considerable anti-irritant and anti-inflammatory properties, but the effective concentration of xylitol is lower than that of glycerol.
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Affiliation(s)
- E Szél
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
| | - H Polyánka
- Dermatological Research Group of the Hungarian Academy of Sciences, University of Szeged, Szeged, Hungary
| | - K Szabó
- Dermatological Research Group of the Hungarian Academy of Sciences, University of Szeged, Szeged, Hungary
| | - P Hartmann
- Institute of Surgical Research, University of Szeged, Szeged, Hungary
| | - D Degovics
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
| | - B Balázs
- Department of Pharmaceutical Technology, University of Szeged, Szeged, Hungary
| | - I B Németh
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
| | - C Korponyai
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
| | - E Csányi
- Department of Pharmaceutical Technology, University of Szeged, Szeged, Hungary
| | - J Kaszaki
- Institute of Surgical Research, University of Szeged, Szeged, Hungary
| | - S Dikstein
- Unit of Cell Pharmacology, Hebrew University, Jerusalem, Israel
| | - K Nagy
- Department of Oral Surgery, University of Szeged, Szeged, Hungary
| | - L Kemény
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary.,Dermatological Research Group of the Hungarian Academy of Sciences, University of Szeged, Szeged, Hungary
| | - G Erős
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary.,Department of Oral Biology and Experimental Dental Research, University of Szeged, Szeged, Hungary
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Bernhardt B, Szabó K, Bernáth J. Sources of variability in essential oil composition of Ocimum americanumand Ocimum tenuiflorum. Acta Alimentaria 2015. [DOI: 10.1556/aalim.44.2015.1.11] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Törőcsik D, Kovács D, Camera E, Lovászi M, Cseri K, Nagy GG, Molinaro R, Rühl R, Tax G, Szabó K, Picardo M, Kemény L, Zouboulis CC, Remenyik É. Leptin promotes a proinflammatory lipid profile and induces inflammatory pathways in human SZ95 sebocytes. Br J Dermatol 2014; 171:1326-35. [PMID: 24975960 DOI: 10.1111/bjd.13229] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/23/2014] [Indexed: 12/24/2022]
Abstract
BACKGROUND Leptin, the adipocyte-secreted hormone that regulates weight, is known to link lipid metabolism with inflammation in various cell types. However, its role in human sebocytes has not yet been investigated. OBJECTIVES The purpose of this study was to investigate the effects of leptin in human sebaceous gland biology. METHODS Expression of the long form of the leptin receptor (Ob-Rb) was detected by real-time quantitative reverse transcriptase polymerase chain reaction (qRT-PCR) and immunochemistry. Lipid analysis was by high-performance thin-layer chromatography, gas chromatography-mass spectrometry and time-of-flight mass spectrometer mass detection. Lipid bodies were visualized by BODIPY staining using fluorescent microscopy and measured by flow cytometry. Interleukin (IL)-6 and IL-8 mRNA levels were assessed by real-time qRT-PCR and their release was evaluated by enzyme-linked immunosorbent assay. Cyclooxygenase (COX)-2 and 5-lipooxygenase (LOX) protein expression and phosphorylation of p65 and signal transducer and activator of transcription (STAT)-3 were determined by Western blot analysis. RESULTS Expression of Ob-Rb was detected in human sebaceous glands and in cultured human SZ95 sebocytes. The treatment of SZ95 sebocytes with leptin led to enlarged intracellular lipid bodies, increased ratios of unsaturated/saturated fatty acids and decreased vitamin E levels. Further supporting a proinflammatory role, leptin induced COX-2 and 5-LOX expression in SZ95 sebocytes and augmented the production of IL-6 and IL-8 cytokines. On leptin treatment, the STAT-3 and nuclear factor-κB pathways were activated, indicating that these known leptin signalling pathways are active in human sebocytes. CONCLUSIONS Our findings suggest that leptin signalling may be involved in the proinflammatory regulation of sebaceous lipid metabolism and the induction of inflammatory enzymes and cytokines.
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Affiliation(s)
- D Törőcsik
- Department of Dermatology, Faculty of Medicine, University of Debrecen, Nagyerdei krt. 98, Debrecen, H4032, Hungary
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Varga E, Korom I, Polyánka H, Szabó K, Széll M, Baltás E, Bata-Csörgő Z, Kemény L, Oláh J. BRAFV600E mutation in cutaneous lesions of patients with adult Langerhans cell histiocytosis. J Eur Acad Dermatol Venereol 2014; 29:1205-11. [DOI: 10.1111/jdv.12792] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2014] [Accepted: 09/19/2014] [Indexed: 12/21/2022]
Affiliation(s)
- E. Varga
- Department of Dermatology and Allergology; Albert Szent-Györgyi Clinical Center; University of Szeged; Szeged Hungary
| | - I. Korom
- Department of Dermatology and Allergology; Albert Szent-Györgyi Clinical Center; University of Szeged; Szeged Hungary
| | - H. Polyánka
- Dermatological Research Group of the Hungarian Academy of Sciences; University of Szeged; Szeged Hungary
| | - K. Szabó
- Dermatological Research Group of the Hungarian Academy of Sciences; University of Szeged; Szeged Hungary
| | - M. Széll
- Dermatological Research Group of the Hungarian Academy of Sciences; University of Szeged; Szeged Hungary
| | - E. Baltás
- Department of Dermatology and Allergology; Albert Szent-Györgyi Clinical Center; University of Szeged; Szeged Hungary
| | - Zs. Bata-Csörgő
- Department of Dermatology and Allergology; Albert Szent-Györgyi Clinical Center; University of Szeged; Szeged Hungary
| | - L. Kemény
- Department of Dermatology and Allergology; Albert Szent-Györgyi Clinical Center; University of Szeged; Szeged Hungary
- Dermatological Research Group of the Hungarian Academy of Sciences; University of Szeged; Szeged Hungary
| | - J. Oláh
- Department of Dermatology and Allergology; Albert Szent-Györgyi Clinical Center; University of Szeged; Szeged Hungary
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Fazekas B, Polyánka H, Bebes A, Tax G, Szabó K, Farkas K, Kinyó A, Nagy F, Kemény L, Széll M, Ádám É. UVB-dependent changes in the expression of fast-responding early genes is modulated by huCOP1 in keratinocytes. J Photochem Photobiol B 2014; 140:215-22. [PMID: 25169772 DOI: 10.1016/j.jphotobiol.2014.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 07/23/2014] [Accepted: 08/01/2014] [Indexed: 10/24/2022]
Abstract
Ultraviolet (UV) B is the most prominent physical carcinogen in the environment leading to the development of various skin cancers. We have previously demonstrated that the human ortholog of the Arabidopsis thaliana constitutive photomorphogenesis 1 (COP1) protein, huCOP1, is expressed in keratinocytes in a UVB-regulated manner and is a negative regulator of p53 as a posttranslational modifier. However, it was not known whether huCOP1 plays a role in mediating the UVB-induced early transcriptional responses of human keratinocytes. In this study, we report that stable siRNA-mediated silencing of huCOP1 affects the UVB response of several genes within 2 h of irradiation, indicating that altered huCOP1 expression sensitizes the cells toward UVB. Pathway analysis identified a molecular network in which 13 of the 30 examined UVB-regulated genes were organized around three central proteins. Since the expression of the investigated genes was upregulated by UVB in the siCOP1 cell line, we hypothesize that huCOP1 is a repressor of the identified pathway. Several members of the network have been implicated previously in the pathogenesis of non-melanoma skin cancers; therefore, clarifying the role of huCOP1 in these skin diseases may have clinical relevance in the future.
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Affiliation(s)
- B Fazekas
- Department of Dermatology and Allergology, Faculty of Medicine, University of Szeged, Szeged, Hungary.
| | - H Polyánka
- MTA-SZTE Dermatological Research Group, University of Szeged, Szeged, Hungary
| | - A Bebes
- Department of Dermatology and Allergology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - G Tax
- Department of Dermatology and Allergology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - K Szabó
- MTA-SZTE Dermatological Research Group, University of Szeged, Szeged, Hungary
| | - K Farkas
- MTA-SZTE Dermatological Research Group, University of Szeged, Szeged, Hungary
| | - A Kinyó
- Department of Dermatology and Allergology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - F Nagy
- Institute of Plant Biology, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, Hungary
| | - L Kemény
- Department of Dermatology and Allergology, Faculty of Medicine, University of Szeged, Szeged, Hungary; MTA-SZTE Dermatological Research Group, University of Szeged, Szeged, Hungary
| | - M Széll
- MTA-SZTE Dermatological Research Group, University of Szeged, Szeged, Hungary; Institute of Medical Genetics, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - É Ádám
- Institute of Plant Biology, Biological Research Centre of the Hungarian Academy of Sciences, Szeged, Hungary
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Abstract
Slow worms (Anguis spp.) are widely distributed in Europe. Based on pronounced divergences in molecular markers the subspecies of the slow worm, Anguis fragilis, have been recently elevated to species level. In Hungary both A. fragilis and A. colchica are present in the mountainous areas with their range being separated by the Danube River with potential contact zones in the Danube valley. Based on morphology, hybridization of the two taxa has been described earlier from the Budai and Pilis Mountains. In order to reveal the exact distribution and confirm hybridization of Anguis taxa in Hungary we analyzed fragments of mitochondrial (ND2) and nuclear (Rag1) genes in 36 specimens from eight regions of Hungary and adjacent countries. The results confirmed the previously known distribution pattern with an east-west split along the Danube River and supported the morphological findings about hybridization in the Budai and Pilis Mountains.
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Affiliation(s)
- Krisztián Szabó
- 1Institute of Biology, Faculty of Veterinary Science, Szent István University, Rottenbiller u. 50, 1078 Budapest, Hungary
- 2Department of Zoology, Hungarian Natural History Museum, Baross u. 13, 1088 Budapest, Hungary
| | - Judit Vörös
- 2Department of Zoology, Hungarian Natural History Museum, Baross u. 13, 1088 Budapest, Hungary
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Pipoly I, Bókony V, Seress G, Szabó K, Liker A. Effects of extreme weather on reproductive success in a temperate-breeding songbird. PLoS One 2013; 8:e80033. [PMID: 24224033 PMCID: PMC3818280 DOI: 10.1371/journal.pone.0080033] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2013] [Accepted: 09/30/2013] [Indexed: 11/17/2022] Open
Abstract
The frequency of extreme meteorological events such as heat waves and rainstorms is predicted to increase with climate change. However, there is still little information about how extreme weather influences reproduction in animals. It may not only affect breeding success but might also alter offspring sex ratio if males and females are differentially sensitive to meteorological conditions during development. We investigated the relationship between meteorological conditions and reproductive success over 6 years in a house sparrow population in central Europe. We found that hatching success increased with the number of extremely hot days (daily maximum >31°C) and decreased with the number of extremely cold days (<16°C) during incubation, although the latter effect held only for clutches with relatively short incubation periods. Fledging success was unrelated to weather variables. However, the frequency of extremely hot days had a negative effect on fledglings' body mass and tarsus length, although both of these traits were positively related to average temperature. Additionally, fledglings' body mass increased with the length of period without rainfall before fledging. Male to female ratio among fledglings did not differ from 1:1 and did not vary with weather variables. The magnitude of the effects of extreme meteorological events was usually small, although in some cases comparable to those of ecologically relevant predictors of reproductive success. Our results indicate that meteorological conditions have complex effects on breeding success, as the effects of extreme weather can differ between different aspects of reproduction and also from the effects of overall meteorological conditions.
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Affiliation(s)
- Ivett Pipoly
- Department of Limnology, University of Pannonia, Veszprém, Hungary
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Szabó K, Nagypál I, Fábián I. Unexpected dependence of the protonation constant of 2,2'-bipyridyl on ionic strength. Talanta 2012; 30:801-4. [PMID: 18963471 DOI: 10.1016/0039-9140(83)80184-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/1983] [Accepted: 04/26/1983] [Indexed: 11/30/2022]
Abstract
The protonation constants of 2,2'-bipyridyl and ammonia have been determined by pH titration at 25 degrees , at ionic strengths of 0.1, 0.2, 0.5, 1.0, 1.5 and 2.0M obtained by using LiNO(3), NaNO(3), KNO(3), LiClO(4) and NaClO(4) as background electrolytes. The protonation constants generally change by about 0.3-0.4 log units for both ligands in nitrate media. A similar change in the protonation constant of ammonia was observed in perchlorate media. There is, however, a change of about 0.8-0.9 log units in the protonation constant of bipyridyl in the perchlorate media. This phenomenon is interpreted by postulating ion-pair formation between perchlorate and the protonated form of bipyridyl, HBp(+) + ClO(4)(-) rlharr2; HBp(+).ClO(4)(-) with formation constants of 0.54 in 2M lithium nitrate and 0.45 in 2M sodium nitrate.
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Affiliation(s)
- K Szabó
- Institute of Chemistry, Janus Pannonius University, H-7644 Pécs, Hungary
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Cserháti B, Juhos K, Begyik A, Radácsi P, Németh É, Szabó K. In situ morphological variability of wild marjoram (Origanum vulgareL.) populations in Hungary. Acta Alimentaria 2012. [DOI: 10.1556/aalim.41.2012.suppl.2] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Vereczkey A, Szabó K, Faragó B, Tölgyesi G, Csenki M, Margittai É, Kósa Z. P35 First Hungarian results on aneuploidy patterns of day three embryos analyzed by array comparative genome hybridization. Reprod Biomed Online 2012. [DOI: 10.1016/s1472-6483(12)60252-1] [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: 10/28/2022]
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Recuero E, Canestrelli D, Vörös J, Szabó K, Poyarkov NA, Arntzen JW, Crnobrnja-Isailovic J, Kidov AA, Cogălniceanu D, Caputo FP, Nascetti G, Martínez-Solano I. Multilocus species tree analyses resolve the radiation of the widespread Bufo bufo species group (Anura, Bufonidae). Mol Phylogenet Evol 2011; 62:71-86. [PMID: 21964513 DOI: 10.1016/j.ympev.2011.09.008] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [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: 07/05/2011] [Revised: 09/07/2011] [Accepted: 09/11/2011] [Indexed: 11/19/2022]
Abstract
New analytical methods are improving our ability to reconstruct robust species trees from multilocus datasets, despite difficulties in phylogenetic reconstruction associated with recent, rapid divergence, incomplete lineage sorting and/or introgression. In this study, we applied these methods to resolve the radiation of toads in the Bufo bufo (Anura, Bufonidae) species group, ranging from the Iberian Peninsula and North Africa to Siberia, based on sequences from two mitochondrial and four nuclear DNA regions (3490 base pairs). We obtained a fully-resolved topology, with the recently described Bufo eichwaldi from the Talysh Mountains in south Azerbaijan and Iran as the sister taxon to a clade including: (1) north African, Iberian, and most French populations, referred herein to Bufo spinosus based on the implied inclusion of populations from its type locality and (2) a second clade, sister to B. spinosus, including two sister subclades: one with all samples of Bufo verrucosissimus from the Caucasus and another one with samples of B. bufo from northern France to Russia, including the Apennine and Balkan peninsulas and most of Anatolia. Coalescent-based estimations of time to most recent common ancestors for each species and selected subclades allowed historical reconstruction of the diversification of the species group in the context of Mediterranean paleogeography and indicated a long evolutionary history in this region. Finally, we used our data to delimit the ranges of the four species, particularly the more widespread and historically confused B. spinosus and B. bufo, and identify potential contact zones, some of which show striking parallels with other co-distributed species.
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Affiliation(s)
- E Recuero
- Museo Nacional de Ciencias Naturales, CSIC, c/ José Gutiérrez Abascal, 2, 28006 Madrid, Spain
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Novák I, Sipos L, Kókai Z, Szabó K, Pluhár Z, Sárosi S. Effect of the drying method on the composition ofOriganum vulgareL. subsp.hirtumessential oil analysed by GC-MS and sensory profile method. Acta Alimentaria 2011. [DOI: 10.1556/aalim.40.2011.suppl.13] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Szabó K, Tax G, Kis K, Szegedi K, Teodorescu-Brinzeu DG, Diószegi C, Koreck A, Széll M, Kemény L. Interleukin-1A +4845(G> T) polymorphism is a factor predisposing to acne vulgaris. ACTA ACUST UNITED AC 2010; 76:411-5. [PMID: 20630038 DOI: 10.1111/j.1399-0039.2010.01530.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Acne vulgaris is a common chronic inflammatory skin disease of multifactorial origin. The aim of this study was to clarify whether known polymorphisms of the interleukin-1A (IL1A) and IL1RN genes play a role in the pathogenesis of acne vulgaris. A positive association was found between the minor T allele of the IL1A +4845(G>T) single nucleotide polymorphism (SNP) and acne, whereas no association was found with respect to any alleles of the variable number of tandem repeats (VNTR) polymorphism of the IL1RN gene. The severity of inflammatory acne symptoms correlated with the percentage of individuals carrying the homozygote T/T genotype. These results may help to elucidate the molecular events leading to the development of acne.
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Affiliation(s)
- K Szabó
- Dermatological Research Group of the Hungarian Academy of Sciences, Szeged, Hungary.
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Tóth Z, Bókony V, Lendvai ÁZ, Szabó K, Pénzes Z, Liker A. Whom do the sparrows follow? The effect of kinship on social preference in house sparrow flocks. Behav Processes 2009; 82:173-7. [DOI: 10.1016/j.beproc.2009.06.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2008] [Revised: 06/12/2009] [Accepted: 06/13/2009] [Indexed: 02/07/2023]
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Priskin K, Szabó K, Tömöry G, Bogácsi-Szabó E, Csányi B, Eördögh R, Downes CS, Raskó I. Mitochondrial sequence variation in ancient horses from the Carpathian Basin and possible modern relatives. Genetica 2009; 138:211-8. [PMID: 19789983 DOI: 10.1007/s10709-009-9411-x] [Citation(s) in RCA: 9] [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: 01/28/2009] [Accepted: 09/15/2009] [Indexed: 10/20/2022]
Abstract
Movements of human populations leave their traces in the genetic makeup of the areas affected; the same applies to the horses that move with their owners This study is concerned with the mitochondrial control region genotypes of 31 archaeological horse remains, excavated from pre-conquest Avar and post-conquest Hungarian burial sites in the Carpathian Basin dating from the sixth to the tenth century. To investigate relationships to other ancient and recent breeds, modern Hucul and Akhal Teke samples were also collected, and mtDNA control region (CR) sequences from 76 breeds representing 921 individual specimens were combined with our sequence data. Phylogenetic relationships among horse mtDNA CR haplotypes were estimated using both genetic distance and the non-dichotomous network method. Both methods indicated a separation between horses of the Avars and the Hungarians. Our results show that the ethnic changes induced by the Hungarian Conquest were accompanied by a corresponding change in the stables of the Carpathian Basin.
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Affiliation(s)
- K Priskin
- Institute of Genetics, Biological Research Center of the Hungarian Academy of Sciences, Szeged, Hungary.
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Abstract
Social behaviour of group-living animals is often influenced by the relatedness of individuals, thus understanding the genetic structure of groups is important for the interpretation of costs and benefits of social interactions. In this study, we investigated genetic relatedness in feeding aggregations of free-living house sparrows (Passer domesticus) during the nonbreeding season. This species is a frequent model system for studies of social behaviour (e.g. aggression, social foraging), but we lack adequate information on the kin structure of sparrow flocks. During two winters, we ringed and observed sparrows at feeding stations, and used resightings to identify stable flock-members and to calculate association indices between birds. We genotyped the birds using seven highly polymorphic microsatellite loci, and estimated pairwise relatedness coefficients and relatedness categories (close kin vs. unrelated) by maximum likelihood method. We found that most birds were unrelated to each other in the flocks (mean +/- SE relatedness coefficient: 0.06 +/- 0.002), although most individuals had at least a few close relatives in their home flock (14.3 +/- 0.6% of flock-mates). Pairwise association between individuals was not significantly related to their genetic relatedness. Furthermore, there was no difference between within-flock vs. between-flock relatedness, and birds had similar proportions of close kin within and outside their home flock. Finally, relatedness among members of different flocks was unrelated to the distance between their flocks. Thus, sparrow flocks were not characterized by association of relatives, nevertheless the presence of some close kin may provide opportunity for kin-biased behaviours to evolve.
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Affiliation(s)
- A Liker
- Department of Limnology, University of Pannonia, Pf. 158, H-8201 Veszprém, Hungary.
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Abstract
BACKGROUND Merkel cell carcinoma (MCC) is a rare, aggressive tumour for which an increasing incidence has been reported. A new human polyomavirus, Merkel cell polyomavirus (MCV), was recently isolated from these tumours by applying digital transcriptome subtraction methodology. OBJECTIVES To detect the presence or absence of MCV in MCCs and other, randomly selected neoplasms. METHODS Nine primary or recurrent MCCs from seven patients were examined; 29 other tumours (squamous cell, basal cell and basosquamous carcinomas and malignant melanomas) were examined for comparative purposes. Viral large T protein (LT1 and LT3), and viral capsid protein (VP1) were detected by primer-directed amplification, using a polymerase chain reaction (PCR)-based method, and the amplified PCR products were analysed by agarose gel electrophoresis and subsequent sequence analysis. RESULTS The presence of viral T antigen and/or viral capsid DNA sequences was demonstrated in seven of the eight MCC lesions. None of the comparative samples contained MCV DNA. CONCLUSIONS Our findings strongly support the hypothesis that MCV infection may well be specific for MCC, and MCV may play a role in the pathogenesis of MCC.
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Affiliation(s)
- E Varga
- Department of Dermatology and Allergology, University of Szeged, H-6720 Szeged, Hungary.
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Szabó K, Szalmás A, Liker A, Barta Z. Adaptive host-abandonment of ectoparasites before fledging? Within-brood distribution of nest mites in house sparrow broods. J Parasitol 2008; 94:1038-43. [PMID: 18576698 DOI: 10.1645/ge-1150.1] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2006] [Accepted: 02/12/2008] [Indexed: 11/10/2022] Open
Abstract
We studied the within-brood distribution of a haematophagous mite Pellonyssus reedi living on nestling house sparrows (Passer domesticus) near the time of fledging. We measured the natural level of infestation of individual nestlings, and determined the feeding efficiency of mites, by scoring their feeding status. Within-brood distribution of mite loads was unrelated to nestling body mass, tarsus length, or immunocompetence. These results did not support parasite preference for large or susceptible hosts. Mite feeding-efficiency was also unrelated to these nestling characteristics, confirming that large nestlings or nestlings with less-developed immunocompetence did not provide superior feeding conditions for mites. Therefore, our results do not support the hypothesis that within-brood distribution of avian ectoparasites is explained by the parasites' preferences for characteristics, such as large body size or low immunocompetence, that make nestlings suitable hosts. On the other hand, we found that mite loads were negatively correlated with nestling age and feather length, suggesting that nestlings closer to fledging harbored fewer mites then their less-developed nestmates. Furthermore, feather length had a stronger relationship with parasite distribution than did nestling age. We presume, therefore, that feather characteristics, i.e., length, may serve as a signal for mites to perceive the ready-to-fledge state of nestlings, inducing abandonment behavior. These results support another, largely neglected hypothesis, i.e., that the avoidance or abandonment of those nestlings that are close to fledging may also explain the parasites' distribution in a brood. This hypothesis is based on the argument that many nest-dwelling ectoparasites breed in the nest material and emerge only periodically to feed on nestlings. In such parasites, the ability to recognize and avoid mature fledglings can be adaptive because this may help the parasites to avoid their removal from the nest so they can continue to reproduce by feeding on unfledged chicks of the current or later broods. Our results suggest that adaptive host-abandonment by nest-dwelling ectoparasites can influence within-brood parasite distributions around the time of fledging.
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Affiliation(s)
- Krisztián Szabó
- Behavioral Ecology Research Group, Department of Evolutionary Zoology and Human Biology, University of Debrecen, H-4010 Debrecen, P.O. Box 3, Hungary.
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Raposa T, Bodnár M, Dombi J, Gasztonyi Z, Aryan H, Iványi J, Marton É, Palaczki A, Petz S, Szabó K, Valasinyószky E, Noszek A, István L. P159 Study on clinical and biological characteristics in chronic lymphocytic leukemia. Blood Rev 2007. [DOI: 10.1016/s0268-960x(07)70238-2] [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: 10/22/2022]
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Horváth A, Miskolczi E, Mihálffy S, Osz K, Szabó K, Urbányi B. Cryopreservation of common carp (Cyprinus carpio) sperm in 1.2 and 5 ml straws and occurrence of haploids among larvae produced with cryopreserved sperm. Cryobiology 2007; 54:251-7. [PMID: 17400204 DOI: 10.1016/j.cryobiol.2007.02.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [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: 10/06/2006] [Revised: 01/17/2007] [Accepted: 02/13/2007] [Indexed: 11/25/2022]
Abstract
Experiments were carried out on the cryopreservation of common carp (Cyprinus carpio) sperm in order to test the suitability of using 1.2 and 5 ml straws and to investigate the ploidy of malformed larvae found among the hatched progeny. In the first set of experiments, the effect of freezing time was investigated on the hatch rate of embryos. The highest hatch rate for 1.2 ml straws was 69+/-16% at the freezing time of 4 min, and 39+/-27% for 5 ml straws at 5 min. In the second set, the effect different egg volumes fertilized with one straw of sperm on the hatch rate and the rate of malformed larvae was investigated. The highest hatch rate with 1.2 ml straws (86+/-12%) was observed when 10 g of eggs were fertilized with one straw, whereas with 5 ml straws the hatch rate was highest (65+/-18%) when 40 g of eggs were fertilized. The highest rate of malformed larvae (15+/-9%) was found in the control, whereas the highest rate of malformed larvae among the groups fertilized with cryopreserved sperm (13+/-7%) was found in the 1x dose group fertilized with 5 ml straw. The chromosome numbers of malformed larvae were investigated and haploids were found among those hatched from eggs fertilized with cryopreserved sperm whereas only diploids were found in the controls.
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Affiliation(s)
- Akos Horváth
- Department of Fish Culture, Faculty of Agricultural and Environmental Sciences, Szent István University, H-2103 Gödöllo, Páter Károly u. 1., Hungary.
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Ács É, Reskóné NM, Szabó K, Taba G, Kiss KT. Application of epiphytic diatoms in water quality monitoring of Lake Velence - recommendations and assignments. ACTA ACUST UNITED AC 2005. [DOI: 10.1556/abot.47.2005.3-4.1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [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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Szabó K, Herczeg G, Korsós Z. Asymmetry and population characteristics in dice snakes (Natrix tessellata): an interpopulation comparison. AMPHIBIA-REPTILIA 2005. [DOI: 10.1163/156853805774408540] [Citation(s) in RCA: 9] [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: 11/19/2022]
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Ács É, Szabó K, Tóth B, Kiss KT. Investigation of benthic algal communities, especially diatoms of some Hungarian streams in connection with reference conditions of the water framework directives. ACTA ACUST UNITED AC 2004. [DOI: 10.1556/abot.46.2004.3-4.1] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [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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Bálint A, Máté M, Barta T, Fazekas T, Solymosi A, Szabó K. [Antireflux procedures at our unit (1990-1999)]. Magy Seb 2001; 54:283-6. [PMID: 11723729] [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: 02/22/2023]
Abstract
UNLABELLED A retrospective analysis was carried out to evaluate the changing attitude of antireflux surgical practice of the authors. Between 1990 and 1994 24 antireflux procedures were performed. Laparoscopic antireflux surgery was introduced in 1995. Since then 41 laparoscopic and 23 open repairs have been performed. Indication for surgery was always based on thorough preoperative examination protocol including functional tests of the esophagus. Each patients had undergone endoscopic and X-ray examinations. The patients are under continuous follow-up surveillance. During the postoperative follow-up studies more than 2/3 of the patients (61 patients) agreed to carry out the functional tests postoperatively. RESULTS The demographic data of patients of the two study periods proved to be comparable. The length of history was 10.5 years in the first group, while it was 8.9 years in the second group. In both groups the surgical repair caused significant reflux control confirmed by decrease of reflux index and number of reflux episodes furthermore by increase of resting lower esophageal sphincter pressure. Actually 4 recurrences are known in the first group and 2 in the second group. One of the 4 recurrences observed in the first period was treated by redo surgery. The patients having recurrences in the second period can easily be managed by medical therapy. There was no mortality and severe morbidity during the study periods. Few patients reported mild temporary dysphagia. CONCLUSIONS In a given proportion of reflux patients the individually planned and perfectly performed antireflux surgery offers an acceptable definitive treatment option. The availability of endoscopic surgery enhances this trend, which can be seen all over the world. An increase can be seen in the number of procedures: nearly three times more patients were operated on during the second period. The early clinical results of laparoscopic antireflux procedures are good enough. Good long-term results can be expected if we accept and apply the basic technical principles determined during the open surgery era.
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Affiliation(s)
- A Bálint
- Semmelweis Egyetem Altalános Orvostudományi Kar III, sz. Sebészeti Klinika, 1096 Budapest, Nagyvárad tér 1.
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Szabó K, Ács É, Pápista É. Periphhyton and phytoplankton in the Soroksár-Danube in Hungary. I.Periphytic algae on reed stems. ACTA ACUST UNITED AC 2001. [DOI: 10.1556/abot.43.2001.1-2.2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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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Bálint A, Máté M, Szabó K, Romics L. Surgical aspects of gastro-esophageal reflux disease--indication for surgery. An update. Acta Chir Hung 2001; 38:123-6. [PMID: 10596311] [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: 02/14/2023]
Abstract
Gastro-esophageal reflux disease is regarded as the single most common foregut disorder mainly in Western countries. The pathophysiological background of the disease is multifactorial. The primary aim of the management of gastro-esophageal reflux disease is relieving heartburn and healing esophagitis. The therapeutic objectives are alleviating symptoms, preventing complications and avoiding recurrence. Besides the effective medical treatment nowadays we possess the minimal invasive anti-reflux surgery which gives comparable, even better results than medical therapy does, in cases of patients who are suitable for anti-reflux surgery. The key question is the appropriate patient selection. In order to achieve the most adequate patient selection, diagnostic tools like endoscopy, radiotherapy, esophageal body and sphincter manometry, 24-hour esophageal pH monitoring and occasionally 24-hour bile exposure monitoring and gastric emptying studies are mandatory to carry out preoperatively. On the basis of the results of these tests the tailored concept of anti-reflux surgery can be applied. The importance of experienced surgeon should be pointed out, too.
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Affiliation(s)
- A Bálint
- 3rd Department of Surgery, Semmelweis University Medical School, Budapest, Hungary
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