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Rashidiani S, Mamo G, Farkas B, Szabadi A, Farkas B, Uszkai V, Császár A, Brandt B, Kovács K, Pap M, Rauch TA. Integrative Epigenetic and Molecular Analysis Reveals a Novel Promoter for a New Isoform of the Transcription Factor TEAD4. Int J Mol Sci 2024; 25:2223. [PMID: 38396900 PMCID: PMC10888684 DOI: 10.3390/ijms25042223] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 02/07/2024] [Accepted: 02/11/2024] [Indexed: 02/25/2024] Open
Abstract
TEAD4 is a transcription factor that plays a crucial role in the Hippo pathway by regulating the expression of genes related to proliferation and apoptosis. It is also involved in the maintenance and differentiation of the trophectoderm during pre- and post-implantation embryonic development. An alternative promoter for the TEAD4 gene was identified through epigenetic profile analysis, and a new transcript from the intronic region of TEAD4 was discovered using the 5'RACE method. The transcript of the novel promoter encodes a TEAD4 isoform (TEAD4-ΔN) that lacks the DNA-binding domain but retains the C-terminal protein-protein interaction domain. Gene expression studies, including end-point PCR and Western blotting, showed that full-length TEAD4 was present in all investigated tissues. However, TEAD4-ΔN was only detectable in certain cell types. The TEAD4-ΔN promoter is conserved throughout evolution and demonstrates transcriptional activity in transient-expression experiments. Our study reveals that TEAD4 interacts with the alternative promoter and increases the expression of the truncated isoform. DNA methylation plays a crucial function in the restricted expression of the TEAD4-ΔN isoform in specific tissues, including the umbilical cord and the placenta. The data presented indicate that the DNA-methylation status of the TEAD4-ΔN promoter plays a critical role in regulating organ size, cancer development, and placenta differentiation.
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Affiliation(s)
- Shima Rashidiani
- Institute of Biochemistry and Medical Chemistry, Medical School, University of Pécs, 7624 Pécs, Hungary; (S.R.); (G.M.); (B.F.); (A.S.)
| | - Gizaw Mamo
- Institute of Biochemistry and Medical Chemistry, Medical School, University of Pécs, 7624 Pécs, Hungary; (S.R.); (G.M.); (B.F.); (A.S.)
| | - Benjámin Farkas
- Institute of Biochemistry and Medical Chemistry, Medical School, University of Pécs, 7624 Pécs, Hungary; (S.R.); (G.M.); (B.F.); (A.S.)
| | - András Szabadi
- Institute of Biochemistry and Medical Chemistry, Medical School, University of Pécs, 7624 Pécs, Hungary; (S.R.); (G.M.); (B.F.); (A.S.)
- Department of Dentistry, Oral and Maxillofacial Surgery, Medical School, University of Pécs, 7623 Pécs, Hungary
| | - Bálint Farkas
- Department of Obstetrics and Gynecology, Medical School, University of Pécs, 7624 Pécs, Hungary; (B.F.); (V.U.); (A.C.)
- National Laboratory of Human Reproduction, University of Pécs, 7624 Pécs, Hungary
| | - Veronika Uszkai
- Department of Obstetrics and Gynecology, Medical School, University of Pécs, 7624 Pécs, Hungary; (B.F.); (V.U.); (A.C.)
| | - András Császár
- Department of Obstetrics and Gynecology, Medical School, University of Pécs, 7624 Pécs, Hungary; (B.F.); (V.U.); (A.C.)
| | - Barbara Brandt
- Department of Medical Biology and Central Electron Microscope Laboratory, Medical School, University of Pécs, 7624 Pécs, Hungary (M.P.)
| | - Kálmán Kovács
- Department of Obstetrics and Gynecology, Medical School, University of Pécs, 7624 Pécs, Hungary; (B.F.); (V.U.); (A.C.)
- National Laboratory of Human Reproduction, University of Pécs, 7624 Pécs, Hungary
| | - Marianna Pap
- Department of Medical Biology and Central Electron Microscope Laboratory, Medical School, University of Pécs, 7624 Pécs, Hungary (M.P.)
| | - Tibor A. Rauch
- Institute of Biochemistry and Medical Chemistry, Medical School, University of Pécs, 7624 Pécs, Hungary; (S.R.); (G.M.); (B.F.); (A.S.)
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Čović M, Zjalić M, Mihajlović L, Pap M, Wagner J, Mandić D, Debeljak Ž, Heffer M. Sucralose Targets the Insulin Signaling Pathway in the SH-SY5Y Neuroblastoma Cell Line. Metabolites 2023; 13:817. [PMID: 37512524 PMCID: PMC10385368 DOI: 10.3390/metabo13070817] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 06/27/2023] [Accepted: 06/29/2023] [Indexed: 07/30/2023] Open
Abstract
Sucralose is widely used as a non-nutritive sweetener (NNS). However, in order to justify its use as a non-nutritive food additive, sucralose would have to be metabolically neutral. The aim of this study was to examine whether sucralose altered the insulin signaling pathway in an in vitro cell model of Parkinson's disease (PD)-the dopaminergic differentiated cell line SH-SY5Y. Cells were exposed to sucralose alone and in combination with either insulin or levodopa. Activation of the insulin signaling pathway was assessed by quantifying protein kinase B (AKT) and glycogen synthase kinase 3 (GSK3), as well as the phosphorylated forms of insulin-like growth factor 1 receptor (IGF1-R). Metabolic effects were assayed using MALDI-TOF MS analysis. In the cell viability test, 2 mM sucralose had a negative effect, and levodopa in all combinations had a positive effect. Sucralose treatment alone suppressed GSK3 and IGF1-R phosphorylation in a dose-dependent manner. This treatment also altered the metabolism of fatty acids and amino acids, especially when combined with insulin and levodopa. Suppression of the insulin signaling pathway and sucralose-induced changes in the metabolic profile could underlie a diet-acquired insulin resistance, previously associated with neurodegeneration, or may be an altered response to insulin or levodopa medical therapy.
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Affiliation(s)
- Marina Čović
- Department of Medical Biology and Genetics, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
- Department of Pharmacology and Biochemistry, Faculty of Dental Medicine and Health, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
| | - Milorad Zjalić
- Department of Medical Biology and Genetics, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
- Department of Molecular Medicine and Biotechnology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia
| | - Lovro Mihajlović
- Department of Medical Biology and Genetics, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
| | - Marianna Pap
- Department of Medical Biology and Central Electron Microscopic Laboratory, University of Pécs Medical School, 7624 Pécs, Hungary
| | - Jasenka Wagner
- Department of Medical Biology and Genetics, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
| | - Dario Mandić
- Clinical Institute of Laboratory Diagnostics, Osijek University Hospital, 31000 Osijek, Croatia
- Department of Medical Chemistry, Biochemistry and Clinical Chemistry, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
| | - Željko Debeljak
- Clinical Institute of Laboratory Diagnostics, Osijek University Hospital, 31000 Osijek, Croatia
- Department of Pharmacology, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
| | - Marija Heffer
- Department of Medical Biology and Genetics, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
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Brandt B, Németh M, Berta G, Szünstein M, Heffer M, Rauch TA, Pap M. A Promising Way to Overcome Temozolomide Resistance through Inhibition of Protein Neddylation in Glioblastoma Cell Lines. Int J Mol Sci 2023; 24:ijms24097929. [PMID: 37175636 PMCID: PMC10178391 DOI: 10.3390/ijms24097929] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/21/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023] Open
Abstract
There is no effective therapy for the lately increased incidence of glioblastoma multiforme (GBM)-the most common primary brain tumor characterized by a high degree of invasiveness and genetic heterogeneity. Currently, DNA alkylating agent temozolomide (TMZ) is the standard chemotherapy. Nevertheless, TMZ resistance is a major problem in the treatment of GBM due to numerous molecular mechanisms related to DNA damage repair, epigenetic alterations, cellular drug efflux, apoptosis-autophagy, and overactive protein neddylation. Low molecular weight inhibitors of NEDD8-activating enzyme (NAE), such as MLN4924, attenuate protein neddylation and present a promising low-toxicity anticancer agent. The aim of our study was to find an effective combination treatment with TMZ and MLN4924 in our TMZ-resistant GBM cell lines and study the effect of these combination treatments on different protein expressions such as O6-methylguanine methyltransferase (MGMT) and p53. The combination treatment successfully decreased cell viability and sensitized TMZ-resistant cells to TMZ, foreshadowing a new treatment strategy for GBM.
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Affiliation(s)
- Barbara Brandt
- Department of Medical Biology and Central Electron Microscopic Laboratory, Medical School, University of Pécs, 7624 Pécs, Hungary
| | - Marica Németh
- Department of Medical Biology and Central Electron Microscopic Laboratory, Medical School, University of Pécs, 7624 Pécs, Hungary
| | - Gergely Berta
- Department of Medical Biology and Central Electron Microscopic Laboratory, Medical School, University of Pécs, 7624 Pécs, Hungary
| | - Máté Szünstein
- Department of Ecology, Faculty of Sciences, University of Pécs, 7624 Pécs, Hungary
| | - Marija Heffer
- Department of Medical Biology and Genetics, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
| | - Tibor A Rauch
- Department of Biochemistry and Medical Chemistry, Medical School, University of Pécs, 7624 Pécs, Hungary
| | - Marianna Pap
- Department of Medical Biology and Central Electron Microscopic Laboratory, Medical School, University of Pécs, 7624 Pécs, Hungary
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Schipp R, Varga J, Bátor J, Vecsernyés M, Árvai Z, Pap M, Szeberényi J. Partial p53-dependence of anisomycin-induced apoptosis in PC12 cells. Mol Cell Biochem 2017; 434:41-50. [PMID: 28432551 DOI: 10.1007/s11010-017-3035-8] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 04/12/2017] [Indexed: 01/25/2023]
Abstract
The bacterial antibiotic anisomycin is known to induce apoptosis by activating several mitogen-activated protein kinases and by inhibiting protein synthesis. In this study, the influence of p53 protein on the apoptosis-inducing effect of anisomycin was investigated. The effect of protein synthesis-inhibiting concentration of anisomycin on apoptotic events was analyzed using Western blot, DNA fragmentation, and cell viability assays in wild-type PC12 and in mutant p53 protein expressing p143p53PC12 cells. Anisomycin stimulated the main apoptotic pathways in both cell lines, but p143p53PC12 cells showed lower sensitivity to the drug than their wild-type counterparts. Anisomycin caused the activation of the main stress kinases, phosphorylation of the p53 protein and the eukaryotic initiation factor eIF2α, proteolytic cleavage of protein kinase R, Bid, caspase-9 and -3. Furthermore, anisomycin treatment led to the activation of TRAIL and caspase-8, two proteins involved in the extrinsic apoptotic pathway. All these changes were stronger and more sustained in wtPC12 cells. In the presence of the dominant inhibitory p53 protein, p53- dependent genes involved in the regulation of apoptosis may be less transcribed and this can lead to the decrease of apoptotic processes in p143p53PC12 cells.
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Affiliation(s)
- R Schipp
- Department of Medical Biology, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary.,Signal Transduction Research Group, Szentágothai Research Centre, Ifjúság útja 20, Pécs, 7624, Hungary
| | - J Varga
- Department of Medical Biology, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary.,Signal Transduction Research Group, Szentágothai Research Centre, Ifjúság útja 20, Pécs, 7624, Hungary
| | - J Bátor
- Department of Medical Biology, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary.,Signal Transduction Research Group, Szentágothai Research Centre, Ifjúság útja 20, Pécs, 7624, Hungary
| | - M Vecsernyés
- Department of Medical Biology, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary.,Signal Transduction Research Group, Szentágothai Research Centre, Ifjúság útja 20, Pécs, 7624, Hungary
| | - Z Árvai
- Department of Medical Biology, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary.,Signal Transduction Research Group, Szentágothai Research Centre, Ifjúság útja 20, Pécs, 7624, Hungary
| | - M Pap
- Department of Medical Biology, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary.,Signal Transduction Research Group, Szentágothai Research Centre, Ifjúság útja 20, Pécs, 7624, Hungary
| | - József Szeberényi
- Department of Medical Biology, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary. .,Signal Transduction Research Group, Szentágothai Research Centre, Ifjúság útja 20, Pécs, 7624, Hungary.
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Pap M, Bátor J, Szeberényi J. Sensitivity of Human Malignant Melanoma Cell Lines to Newcastle Disease Virus. Anticancer Res 2015; 35:5401-5406. [PMID: 26408702] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
BACKGROUND/AIM Virotherapy may be a promising alternative to chemotherapy of malignant melanoma. In clinical trials using strains of Newcastle disease virus (NDV), only a fraction of patients with cancer responded to virotherapy. In the present study, we tried to find a correlation between the susceptibility of human melanoma cell lines to NDV and growth factor signaling pathways. MATERIALS AND METHODS Using an ATP assay, cytotoxicity of an NDV strain (MTH-68/H) was tested in 13 human melanoma cell lines. The activation state of growth factor signaling pathways was studied by the analysis of key signaling proteins. RESULTS MTH-68/H was found to be cytotoxic in all melanoma cells tested, but the IC50 values varied significantly. No correlation between the IC50 values and the rate of extracellular signal-regulated kinase (ERK) and AKT phosphorylation and phosphatase and tensin homologue (PTEN) expression was found. CONCLUSION Susceptibility of tumor cells to NDV may be affected by alterations other than those of RAS/ERK and phosphatidylinositol 3-kinase (PI3K)/AKT signaling in uninfected cells.
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Affiliation(s)
- Marianna Pap
- Department of Medical Biology, University of Pécs Medical School, Pécs, Hungary Signal Transduction Research Group, János Szentágothai Research Centre, Pécs, Hungary
| | - Judit Bátor
- Department of Medical Biology, University of Pécs Medical School, Pécs, Hungary Signal Transduction Research Group, János Szentágothai Research Centre, Pécs, Hungary
| | - József Szeberényi
- Department of Medical Biology, University of Pécs Medical School, Pécs, Hungary Signal Transduction Research Group, János Szentágothai Research Centre, Pécs, Hungary
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Balogh A, Németh M, Koloszár I, Markó L, Przybyl L, Jinno K, Szigeti C, Heffer M, Gebhardt M, Szeberényi J, Müller DN, Sétáló G, Pap M. Overexpression of CREB protein protects from tunicamycin-induced apoptosis in various rat cell types. Apoptosis 2015; 19:1080-98. [PMID: 24722832 DOI: 10.1007/s10495-014-0986-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Endoplasmic reticulum (ER) stress plays an essential role in unfolded protein response induced apoptosis contributing to several pathological conditions. Glycogen synthase kinase-3β (GSK-3β) plays a central role in several apoptotic signaling, including ER stress, as the active form of GSK-3β induces apoptosis. The phosphorylation of cAMP responsive element (CRE) binding protein (CREB) Ser-133 (S133) residue is the end-point of various signaling pathways, like growth factor signaling, while the Ser-129 (S129) residue is phosphorylated by GSK-3β. The significance of the ubiquitously expressed transcription factor CREB is demonstrated in prolonged, tunicamycin (TM)-induced ER stress in this study. In the experiments wild-type (wt) CREB, S129Ala, S133Ala or S129Ala-S133Ala mutant CREB expressing PC12 rat pheochromocytoma cell lines showed increased survival under TM-evoked prolonged ER stress compared to wtPC12 cells. After TM treatment ER stress was activated in all PC12 cell types. Lithium and SB-216763, the selective, well-known inhibitors of GSK-3β, decreased TM-induced apoptosis and promoted cell survival. The proapoptotic BH3-only Bcl-2 family member Bcl-2-interacting mediator of cell death (Bim) level was decreased in the different CREB overexpressing PC12 cells as a result of TM treatment. CREB overexpression also inhibited the sequestration of Bim protein from tubulin molecules, as it was demonstrated in wtPC12 cells. Transient expression of wtCREB diminished TM-induced apoptosis in wtPC12, Rat-1 and primary rat vascular smooth muscle cells. These findings demonstrate a novel role of CREB in different cell types as a potent protector against ER stress.
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Affiliation(s)
- András Balogh
- Department of Medical Biology, University of Pécs Medical School, Szigeti 12, Pecs, 7624, Hungary
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Varga J, Bátor J, Péter M, Árvai Z, Pap M, Sétáló G, Szeberényi J. The role of the p53 protein in nitrosative stress-induced apoptosis of PC12 rat pheochromocytoma cells. Cell Tissue Res 2014; 358:65-74. [DOI: 10.1007/s00441-014-1932-7] [Citation(s) in RCA: 3] [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] [Received: 03/31/2014] [Accepted: 05/22/2014] [Indexed: 01/30/2023]
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Balogh A, Bátor J, Markó L, Németh M, Pap M, Sétáló G, Müller DN, Csatary LK, Szeberényi J. Gene expression profiling in PC12 cells infected with an oncolytic Newcastle disease virus strain. Virus Res 2014; 185:10-22. [PMID: 24637408 DOI: 10.1016/j.virusres.2014.03.003] [Citation(s) in RCA: 3] [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: 01/09/2014] [Revised: 02/10/2014] [Accepted: 03/06/2014] [Indexed: 11/30/2022]
Abstract
Although the oncolytic potential of natural, non-engineered Newcastle disease virus (NDV) isolates are well-known, cellular mechanisms determining NDV sensitivity of tumor cells are poorly understood. The aim of the present study was to look for gene expression changes in PC12 pheochromocytoma cells infected with an attenuated NDV strain that may be related to NDV susceptibility. PC12 cells were infected with the NDV strain MTH-68/H for 12h at a titer corresponding to the IC₅₀ value. Total cytoplasmic RNA samples isolated from control and MTH-68/H-infected cells were analyzed using a rat specific Affymetrix exon chip. Genes with at least 2-fold increase or decrease in their expression were identified. MTH-68/H-induced gene expression changes of 9 genes were validated using quantitative reverse transcriptase PCR. A total of 729 genes were up- and 612 genes were down-regulated in PC12 cells infected with MTH-68/H. Using the DAVID functional annotation clustering tool, the up- and down-regulated genes can be categorized into 176 and 146 overlapping functional gene clusters, respectively. Gene expression changes affecting the most important signaling mechanisms (Toll-like receptor signaling, RIG-I-like receptor signaling, interferon signaling, interferon effector pathways, apoptosis pathways, endoplasmic reticulum stress pathways, cell cycle regulation) are analyzed and discussed in detail in this paper. NDV-induced gene expression changes described in this paper affect several regulatory mechanisms and dozens of putative key proteins that may determine the NDV susceptibility of various tumors. Further characterization of these proteins may identify susceptibility markers to predict the chances of virotherapeutic treatment of human tumors.
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Affiliation(s)
- András Balogh
- Department of Medical Biology, University of Pécs Medical School, Pécs, Hungary; Signal Transduction Research Group, János Szentágothai Research Centre, Pécs H-7624, Hungary.
| | - Judit Bátor
- Department of Medical Biology, University of Pécs Medical School, Pécs, Hungary; Signal Transduction Research Group, János Szentágothai Research Centre, Pécs H-7624, Hungary.
| | - Lajos Markó
- Experimental and Clinical Research Center, Charité Medical Faculty and Max-Delbrück Center for Molecular Medicine, Berlin 13125, Germany.
| | - Mária Németh
- Department of Medical Biology, University of Pécs Medical School, Pécs, Hungary; Signal Transduction Research Group, János Szentágothai Research Centre, Pécs H-7624, Hungary.
| | - Marianna Pap
- Department of Medical Biology, University of Pécs Medical School, Pécs, Hungary; Signal Transduction Research Group, János Szentágothai Research Centre, Pécs H-7624, Hungary.
| | - György Sétáló
- Department of Medical Biology, University of Pécs Medical School, Pécs, Hungary; Signal Transduction Research Group, János Szentágothai Research Centre, Pécs H-7624, Hungary.
| | - Dominik N Müller
- Experimental and Clinical Research Center, Charité Medical Faculty and Max-Delbrück Center for Molecular Medicine, Berlin 13125, Germany.
| | | | - József Szeberényi
- Department of Medical Biology, University of Pécs Medical School, Pécs, Hungary; Signal Transduction Research Group, János Szentágothai Research Centre, Pécs H-7624, Hungary.
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Berta G, Harci A, Tarjányi O, Vecsernyés M, Balogh A, Pap M, Szeberényi J, Sétáló G. Partial rescue of geldanamycin-induced TrkA depletion by a proteasome inhibitor in PC12 cells. Brain Res 2013; 1520:70-9. [PMID: 23701727 DOI: 10.1016/j.brainres.2013.05.015] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 04/25/2013] [Accepted: 05/10/2013] [Indexed: 10/26/2022]
Abstract
In this work we tried to identify mechanisms that could explain how chemical inhibition of heat-shock protein 90 reduces nerve growth factor signaling in rat pheochromocytoma PC12 cells. Geldanamycin is an antibiotic originally discovered based on its ability to bind heat-shock protein 90. This interaction can lead to the disruption of heat-shock protein 90-containing multimolecular complexes. It can also induce the inhibition or even degradation of partner proteins dissociated from the 90 kDa chaperone and, eventually, can cause apoptosis, for instance, in PC12 cells. Before the onset of initial apoptotic events, however, a marked decrease in the activity of extracellular signal-regulated kinases ERK 1/2 and protein kinase B/Akt can be observed together with reduced expression of the high affinity nerve growth factor receptor, tropomyosine-related kinase, TrkA, in this cell type. The proteasome inhibitor MG-132 can effectively counteract the geldanamycin-induced reduction of TrkA expression and it can render TrkA and ERK1/2 phosphorylation but not that of protein kinase B/Akt by nerve growth factor again inducible. We have found altered intracellular distribution of TrkA in geldanamycin-treated and proteasome-inhibited PC12 cells that may, at least from the viewpoint of protein localization explain why nerve growth factor remains without effect on protein kinase B/Akt. The lack of protein kinase B/Akt stimulation by nerve growth factor in turn reveals why nerve growth factor treatment cannot save PC12 cells from geldanamycin-induced programmed cell death. Our observations can help to better understand the mechanism of action of geldanamycin, a compound with strong human therapeutical potential.
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Affiliation(s)
- Gergely Berta
- Department of Medical Biology, Medical School, University of Pécs, Pécs, Hungary H-7643, Pécs, Szigeti út 12., Hungary
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Mikolás E, Cseh J, Pap M, Szijárto IA, Balogh A, Laczy B, Bekő V, Fisi V, Molnár GA, Mérei A, Szeberényi J, Wittmann I. Effects of erythropoietin on glucose metabolism. Horm Metab Res 2012; 44:279-85. [PMID: 22351476 DOI: 10.1055/s-0032-1301901] [Citation(s) in RCA: 12] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
We purposed to determine the impact of erythropoietin on altering glucose metabolism in the settings of in vitro and in vivo experiments. The acute effect of erythropoietin on lowering blood glucose levels was studied in animal experiments. In [³H]-deoxy-D-glucose isotope studies we measured glucose uptake with insulin and erythropoietin using 3T3-L1 cells cultured under normal or high glucose conditions. Altered activation of Akt and ERK pathways was evaluated in immunoblot analyses. Immunocytochemistry was conducted to determine the glucose transporter 4 translocation to the plasma membrane. Addition of erythropoietin significantly lowered blood glucose levels in vivo in rats. The glucose uptake was markedly increased by erythropoietin treatment (at concentrations 0.15, 0.3, and 0.625 ng/ml) in adipocytes grown in high glucose medium (p<0.05), but it remained unaltered in cells under normal glucose conditions. Significant increase of phosphorylation of ERK and Akt was detected due to erythropoietin (p<0.05). Co-administration of erythropoietin and insulin resulted in higher phosphorylation of Akt and [³H]-deoxy-D-glucose uptake in adipocytes than insulin treatment alone. We found that erythropoietin induced the trafficking of glucose transporter 4 to the plasma membrane. Our data showed that erythropoietin significantly decreased blood glucose levels both in vivo and in vitro, in part, by increasing glucose uptake via the activation of Akt pathway. Preliminary data revealed that adipocytes most likely exhibit a specific receptor for erythropoietin.
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Affiliation(s)
- E Mikolás
- 2nd Department of Medicine and Nephrological Center, University of Pécs, Pécs, Hungary
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Hoblit S, Sandorfi AM, Ardashev K, Bade C, Bartalini O, Blecher M, Caracappa A, D'Angelo A, d'Angelo A, Di Salvo R, Fantini A, Gibson C, Glückler H, Hicks K, Honig A, Kageya T, Khandaker M, Kistner OC, Kizilgul S, Kucuker S, Lehmann A, Lowry M, Lucas M, Mahon J, Miceli L, Moricciani D, Norum B, Pap M, Preedom B, Seyfarth H, Schaerf C, Ströher H, Thorn CE, Whisnant CS, Wang K, Wei X. Measurements of H-->D-->(gamma-->,pi) and implications for the convergence of the Gerasimov-Drell-Hern integral. Phys Rev Lett 2009; 102:172002. [PMID: 19518773 DOI: 10.1103/physrevlett.102.172002] [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] [Subscribe] [Scholar Register] [Received: 07/25/2008] [Indexed: 05/27/2023]
Abstract
We report new measurements of inclusive pi production from frozen-spin HD for polarized photon beams covering the Delta(1232) resonance. These provide data simultaneously on both H and D with nearly complete angular distributions of the spin-difference cross sections entering the Gerasimov-Drell-Hearn (GDH) sum rule. Recent results from Mainz and Bonn exceed the GDH prediction for the proton by 22 microb, suggesting as yet unmeasured high-energy components. Our pi0 data reveal a different angular dependence than assumed in Mainz analyses and integrate to a value that is 18 microb lower, suggesting a more rapid convergence. Our results for deuterium are somewhat lower than published data, considerably more precise, and generally lower than available calculations.
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Affiliation(s)
- S Hoblit
- Department of Physics, University of Virginia, Charlottesville, Virginia 22901, USA.
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12
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Conrad H, Bruckel T, Budwig A, Bussmann K, Engels R, Fracassi V, Heinen J, Heybutzki H, Ioffe A, Kussel E, Kulessa T, Pap M, Schmitz B, Suxdorf F, Zeiske T. A new thermal triple-axis spectrometer at the research reactor FRJ-2. GNER 2008. [DOI: 10.1080/10238160802284831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Pap M, Szeberényi J. Involvement of proteolytic activation of protein kinase R in the apoptosis of PC12 pheochromocytoma cells. Cell Mol Neurobiol 2007; 28:443-56. [PMID: 18080832 DOI: 10.1007/s10571-007-9245-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2007] [Accepted: 11/17/2007] [Indexed: 01/13/2023]
Abstract
Protein kinase R (PKR) is a serine/threonine-specific protein kinase implicated in the control of cell growth, differentiation, interferon-induced antiviral response, and induction of apoptosis. It is activated by various stress signals and growth factors. Activated PKR phosphorylates the alpha subunit of eukaryotic initiation factor 2 (eIF2alpha), thereby inhibiting the initiation of translation. PKR also mediates the activation of several transcription factors (STAT1, p53, and NFkappaB) regulating both pro- and antiapoptotic mechanisms. In the present work, we studied the signaling pathways leading to PKR activation and apoptosis in PC12 rat pheochromocytoma cells, a model system of neuronal differentiation and cell death. We found that administration of various apoptosis inducing agents and conditions (serum starvation, anisomycin, LY294002, etoposide, and cisplatin) led to the proteolytic cleavage of PKR in PC12 cells. This cleavage was in strong correlation with the time kinetics of DNA fragmentation and morphological alterations characteristic of apoptosis. PKR was activated by the proteolytic cleavage: increased phosphorylation of eIF2alpha was found to run parallel with PKR cleavage. The activation of caspase-3 and caspase-9 was stimulated by all apoptosis inducing agents used in this study. The activation of caspase-3 preceded the cleavage of PKR after serum withdrawal, anisomycin and etoposide treatment, while coincided with it in cells treated with LY294002 or cisplatin. These observations suggest that early activation of caspase-3 is upstream of PKR proteolysis and that proteolytic activation of PKR may play a general role in the apoptosis of PC12 cells induced by various forms of cellular stress.
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Affiliation(s)
- Marianna Pap
- Department of Medical Biology, Medical School, University of Pécs, Szigeti 12, 7624, Pécs, Hungary
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14
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Fábián Z, Vecsernyés M, Pap M, Szeberényi J. The effects of a mutant p53 protein on the proliferation and differentiation of PC12 rat phaeochromocytoma cells. J Cell Biochem 2007; 99:1431-41. [PMID: 16817227 DOI: 10.1002/jcb.21019] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
PC12 rat phaeochromocytoma cells show neuronal differentiation upon NGF treatment. NGF induces prolonged activation of the Ras/Raf/MEK/ERK pathway in which the 42/44 kDa mitogen-activated protein kinases (MAPKs), ERK 1 and 2 are thought to be the key mediators of the differentiation signals. Activation of ERKs leads to the increased transcription of early response genes resulting in cell cycle arrest. Upon NGF treatment the p53 protein, the most commonly mutated tumor suppressor in human cancers, translocates to the nucleus and may play a role in the mediation of NGF-induced cell cycle arrest and neuronal differentiation. Here we demonstrate that in PC12 cells expressing both wild-type and V143A mutant p53 proteins (p143p53PC12 cells), p53-mediated biological responses are critically influenced. p143p53PC12 cells are not able to cease their proliferation and begin their neuronal differentiation program upon NGF treatment. The presence of mutant p53 also reduces the DNA-binding activity of endogenous p53 and disturbs the regulatory machinery of p53 including both the phosphorylation of ERK 1/2, p38 and SAPK/JNK MAP kinases and itself.
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Affiliation(s)
- Zsolt Fábián
- Department of Medical Biology, Medical School, University of Pécs, H-7624 Pécs, Szigeti u 12, Hungary
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15
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Abstract
In this study dermatoglyphic traits in 16 populations in northern Hungary were examined. The occurrence and probability of the manifestation of finger pattern types were analysed. Certain relationships were found that show that if a given pattern type is present on one of the fingers, then, in these cases, the frequency of pattern types on the other nine fingers typically is different from that in the entire sample. We termed this relationship or effect; pattern influence. In most cases there was a strong significant difference in frequency values between the entire sample and the studied cases. We studied the relationship of populations and pattern types using correspondence analysis. In the entire sample, most populations are located around the ulnar loop and the whorl. This arrangement is significantly and typically different in pattern-influence cases. Most populations aggregated around the pattern type in which pattern influence was studied. Pattern influence was found in all populations studied, and in both sexes.
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Affiliation(s)
- A S Nagy
- Department of Evolutionary Zoology and Human Biology, University of Debrecen, H-4010 Debrecen, P.O. Box 6, Hungary.
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16
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Pap M, Cooper GM. Role of translation initiation factor 2B in control of cell survival by the phosphatidylinositol 3-kinase/Akt/glycogen synthase kinase 3beta signaling pathway. Mol Cell Biol 2002; 22:578-86. [PMID: 11756553 PMCID: PMC139729 DOI: 10.1128/mcb.22.2.578-586.2002] [Citation(s) in RCA: 129] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The phosphatidylinositol 3-kinase (PI 3-kinase)/Akt signaling pathway is an important mediator of growth factor-dependent survival of mammalian cells. A variety of targets of the Akt protein kinase have been implicated in cell survival, including the protein kinase glycogen synthase kinase 3beta (GSK-3beta). One of the targets of GSK-3beta is translation initiation factor 2B (eIF2B), linking global regulation of protein synthesis to PI 3-kinase/Akt signaling. Because of the central role of protein synthesis, we have investigated the involvement of eIF2B, which is inhibited as a result of GSK-3beta phosphorylation, in programmed cell death. We demonstrate that expression of eIF2B mutants lacking the GSK-3beta phosphorylation or priming sites is sufficient to protect both Rat-1 and PC12 cells from apoptosis induced by overexpression of GSK-3beta, inhibition of PI 3-kinase, or growth factor deprivation. Consistent with these effects on cell survival, expression of nonphosphorylatable eIF2B prevented inhibition of protein synthesis following treatment of cells with the PI 3-kinase inhibitor LY294002. Conversely, cycloheximide induced apoptosis of PC12 and Rat-1 cells, further indicating that protein synthesis was required for cell survival. Inhibition of translation resulting from treatment with cycloheximide led to the release of cytochrome c from mitochondria, similar to the effects of inhibition of PI 3-kinase. Expression of nonphosphorylatable eIF2B prevented cytochrome c release resulting from PI 3-kinase inhibition but did not affect cytochrome c release or apoptosis induced by cycloheximide. Regulation of translation resulting from phosphorylation of eIF2B by GSK-3beta thus appears to contribute to the control of cell survival by the PI 3-kinase/Akt signaling pathway, acting upstream of mitochondrial cytochrome c release.
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Affiliation(s)
- Marianna Pap
- Department of Biology, Boston University, Boston, Massachusetts 02215, USA
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17
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Adamovich K, Pap M, Kövér F. [Hydranencephaly. (Severe cerebral malformations in three newborn infants)]. Orv Hetil 1999; 140:2861-3. [PMID: 10647275] [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: 02/15/2023]
Abstract
Three neonatal cases of hydranencephaly are reported. Clinical and radiological characteristics of this disease are also described. Factors which can have any role in the development of hydranencephaly are reviewed. The importance of intrauterine ultrasonography and the quick, early diagnosis is emphasized. Therapeutic approaches are also discussed.
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Affiliation(s)
- K Adamovich
- Pécsi Orvostudományi Egyetem, Gyermekklinika
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18
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Pap M, Kopcsányi G, Bieber LL, Gage DA, Melegh B. Cefetamet pivoxil treatment causes loss of carnitine reserves that can be prevented by exogenous carnitine administration. J Nutr Biochem 1999; 10:670-3. [PMID: 15539265 DOI: 10.1016/s0955-2863(99)00051-0] [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: 03/02/1999] [Accepted: 03/02/1999] [Indexed: 11/16/2022]
Abstract
Two groups of pediatric patients receiving cefetamet pivoxil treatment (3 x 500 mg daily) for 7 days were studied. In the first group (Group A) the drug was administered alone; in the second group (Group B) the drug was given in combination with a molar excess of carnitine (3 x 1 g). Medication with cefetamet pivoxil alone was associated with a large urinary excretion of pivaloylcarnitine: Approximately 71% of the daily pivalate intake could be eliminated as carnitine ester in the urine. In this group, the plasma level and the urinary output of free carnitine decreased. By contrast, in Group B, the administration of molar excess of carnitine aided stochiometric elimination of pivalate as carnitine ester, and the plasma levels and carnitine-free urinary output were unchanged. The data show that medication of cefetamet pivoxil results in the formation of pivaloylcarnitine in children; the sustained loss of carnitine esters can ultimately lead to carnitine deficiency. Molar excess of exogenous carnitine aids in the elimination of pivalate derived from cefetamet pivoxil therapy and helps to maintain the carnitine reserves.
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Affiliation(s)
- M Pap
- Department of Pediatrics University Medical School of Pécs, Pécs, Hungary
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19
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Abstract
Growth factor-dependent survival of a variety of mammalian cells is dependent on the activation of phosphatidylinositol (PI) 3-kinase and its downstream effector, the protein kinase Akt. Glycogen synthase kinase-3 (GSK-3) has been previously identified as a physiological target of Akt, which is inhibited by phosphorylation, so we have investigated the role of GSK-3 in cell survival. Overexpression of catalytically active GSK-3 induced apoptosis of both Rat-1 and PC12 cells, whereas dominant-negative GSK-3 prevented apoptosis following inhibition of PI 3-kinase. GSK-3 thus plays a critical role in regulation of apoptosis and represents a key downstream target of the PI 3-kinase/Akt survival signaling pathway.
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Affiliation(s)
- M Pap
- Dana-Farber Cancer Institute and the Department of Pathology, Harvard Medical School, Boston, Massachusetts 02115, USA
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20
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Abstract
Induction of neurite formation by nerve growth factor (NGF) in PC12 pheochromocytoma cells can be efficiently inhibited by expressing a dominant negative mutant form of the small guanine nucleotide binding Ha-Ras protein in these cells. The block in NGF-induced neuritogenesis caused by inhibition of endogenous Ras proteins was found to be partially relieved by simultaneous stimulation of cAMP- or Ca++-dependent signaling pathways. Since expression of certain genes is believed to be involved in NGF-signaling leading to morphological differentiation, we decided to study the combined effects of NGF and second messenger analogs on gene expression in PC12 cell lines expressing different levels of the interfering Ras protein. We found NGF-second messenger combinations that induced normal c-fos, zif268 and nur77 early-response gene expression without neuritogenesis, and, conversely, cell lines in which certain combination treatments caused partial neuronal differentiation in the absence of substantial activation of these genes. Similarly, neurite outgrowth induced by combination treatments does not seem to require the activation of the late-response transin gene. Our results thus suggest a lack of strong correlation between NGF-stimulated early- and secondary-response gene induction and morphological differentiation.
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Affiliation(s)
- M Pap
- Department of Biology, University Medical School of Pécs, Hungary
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21
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Melegh B, Pap M, Molnár D, Masszi G, Kopcsányi G. Carnitine administration ameliorates the changes in energy metabolism caused by short-term pivampicillin medication. Eur J Pediatr 1997; 156:795-9. [PMID: 9365072 DOI: 10.1007/s004310050716] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [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: 02/05/2023]
Abstract
UNLABELLED Ten children receiving pivampicillin for 8 days were studied. On the first 4 days the drug was given alone (4 x 500 mg/day), and on the last 4 days in combination with carnitine (4 x 1 g/day). Pivampicillin treatment was associated with formation and urinary excretion of pivaloylcarnitine and administration of carnitine aided the elimination of pivalate as its carnitine ester. The resting respiratory quotient increased from 0.86 +/- 0.01 to 0.96 +/- 0.01 on the 4th day of pivampicillin treatment. A shift was observed in the metabolic fuel consumption: a significant decrease was found in the amount of fats oxidized (0.31 +/- 0.17 vs 1.27 +/- 0.17 g x kg[-1] x 24 h[-1]). while the utilization of carbohydrates increased (6.20 +/- 0.51 vs 4.00 +/- 0.50 g kg[-1] x 24 h[-1]). Administration of carnitine decreased the respiratory quotient to 0.90 +/- 0.01 on the 8th day of treatment, consumption of fats increased, and the oxidation of carbohydrates decreased. The resting energy expenditure was not affected by the treatment. CONCLUSION Pivampicillin treatment results in inhibited oxidation of fats as metabolic fuel. This drug effect was partially reversed by carnitine which promotes the elimination of the pivaloyl moiety from the body.
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Affiliation(s)
- B Melegh
- Department of Paediatrics, University Medical School of Pécs, Hungary
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22
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Szeberényi J, Boglári G, Komáromy L, Nusser N, Pap M, Sebök A, Sétáló G, Tigyi A. Problem-oriented teaching of molecular cell biology. Med Educ 1996; 30:232-234. [PMID: 8949559 DOI: 10.1111/j.1365-2923.1996.tb00748.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- J Szeberényi
- Department of Biology, University Medical School of Pécs, Hungary
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Abstract
Energy metabolism was measured in children receiving long-term treatment with valproic acid. In 8 of 10 randomly selected subjects, the resting respiratory quotient was higher than in age- and sex-matched control subjects (0.91 +/- 0.01 vs 0.87 +/- 0.01; p < 0.05). A shift was observed in fuel consumption, and a significant reduction was found in the amount of fats oxidized (0.68 +/- 0.23 vs 1.18 +/- 0.18 gm.kg-1.day-1), which was accompanied by increased utilization of carbohydrates (5.31 +/- 0.79 vs 3.81 +/- 0.39 gm.kg-1.day-1) in comparison with the control subjects. The resting total energy expenditure was not affected by the treatment. The children with an altered energy consumption pattern (n = 8) received carnitine supplementation for a month; the respiratory quotient then decreased (0.87 +/- 0.02), the oxidation of fats increased (1.42 +/- 0.25), and the consumption of carbohydrates decreased (3.87 +/- 0.79), but no changes in resting energy expenditure were observed. We conclude that carnitine depletion, a known adverse effect of valproic acid administration, may result in inhibited fatty acid oxidation, leading to a shift of substrates utilized from fats to carbohydrates.
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Affiliation(s)
- B Melegh
- Department of Pediatrics, University Medical School of Pécs, Hungary
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Melegh B, Pap M, Bock I, Rebouche CJ. Relationship of carnitine and carnitine precursors lysine, epsilon-N-trimethyllysine, and gamma-butyrobetaine in drug-induced carnitine depletion. Pediatr Res 1993; 34:460-4. [PMID: 8255678 DOI: 10.1203/00006450-199310000-00015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Plasma concentrations and rates of urinary excretion of carnitine and some of its precursors were studied in three groups of children receiving drugs known to cause carnitine depletion. Patients in group A received pivampicillin and a molar equivalent of carnitine for 7 d. Patients in group B received pivampicillin with a 5.8-fold molar excess of carnitine for 1 wk. Patients in group C were treated chronically with valproic acid and received a molar equivalent (to valproic acid) of carnitine for 14 d. Patients in group A had markedly increased (16-fold) urinary carnitine ester excretion concomitant with diminished urinary free carnitine and gamma-butyrobetaine output and lower plasma free carnitine concentration. Supplementation with one molar equivalent of carnitine (to pivampicillin) was ineffective in preventing the reduction of plasma carnitine concentration observed with pivampicillin treatment alone. For group B patients, administration of excess carnitine resulted in a further increase (35-fold) of urinary carnitine ester output with no decrease of plasma carnitine concentration, urinary gamma-butyrobetaine, or free carnitine excretion. For patients in group C, the initially low plasma free and total carnitine concentrations and urinary output of carnitine and carnitine esters markedly increased with carnitine supplementation, but urinary excretion of gamma-butyrobetaine remained unchanged. The plasma concentrations and urinary output of L-lysine and epsilon-N-trimethyllysine remained unchanged within each group before and after treatment. A positive linear correlation was found between urinary epsilon-N-trimethyllysine and 3-methylhistidine output, indicating that the rate of epsilon-N-trimethyllysine excretion correlates with the amount of 3-methylhistidine liberated by protein turnover.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- B Melegh
- Department of Pediatrics, University Medical School of Pécs, Hungary
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25
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Pap M. [Law for the protection of embryos. Targets and methods of legal regulations for dealing with human life in vitro]. Dtsch Krankenpflegez 1992; 45:411-5. [PMID: 1623828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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26
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Abstract
The repeated-pairs of surnames in marriages (RP) approach is applied to the population of Tiszaszalka in north-eastern Hungary. The results indicate that: (1) lineage-like behaviour in mate choice results in population subdivision in both the Catholics and the Protestants of the village; (2) unlike in some other Tiszahat villages, the isonymous and the repeating unions in Tiszaszalka occur in different lineages so, in neither of these subpopulations are isonymous and repeating unions monopolised by a few lineages; (3) religious affilitation influences the mating structure of the population as measured by RP summary scores.
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Affiliation(s)
- T Koertvelyessy
- Department of Sociology and Anthropology, Ohio University, Athens
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27
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Koertvelyessy T, Crawford MH, Pap M, Szilagyi K. Surname repetition and isonymy in northeastern Hungarian marriages. Hum Biol 1990; 62:515-24. [PMID: 2210718] [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: 12/30/2022]
Abstract
The repeated-pair (RP) approach to surnames in married couples is a measure of population subdivision resulting from the influence of lineagelike behavior in mate choice. An excess of RP over random RP implies limitations in mate choice and a reduction of genetic variability. Here we apply the RP method to data from the rural populations of Csaroda, Tiszaadony, and Tiszavid in northeastern Hungary. The results indicate small differences between RP and random RP for Tiszavid and somewhat larger differences for Tiszaadony and Csaroda. The excess of RP over random RP in Tiszavid, however, derives primarily from marriages simultaneously isonymous and repeating in only one lineage. The discrepancy between RP and random RP implies a small reduction in genetic variability.
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Abstract
Ring chromosome 15 was detected in a boy with severe growth failure and no dysmorphic features who had previously been found to have an atrophic intestinal mucosa, a finding not observed in about 300 patients with ring autosome reported so far. Of the 137 metaphases examined, 8.1% had secondary aneuploidy produced by the structural and behavioural instability of the ring. Ring derivatives could also be seen in lymphocytes after only one cycle in the culture, indicating that such cells are also generated in vivo. We observed an increased cell death rate in fibroblast culture by Trypan Blue exclusion. These results suggest that there is a continuous in vivo generation of cells with increased mortality resulting in both growth failure and atrophic intestinal mucosa in the patient. The atrophic intestinal mucosa might be a manifestation of ring instability.
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30
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Soltész G, Pap M, Schultz K, Vinczellér M. [Why is there no decrease in the incidence of infantile hypoglycemia?]. Orv Hetil 1985; 126:1333-6. [PMID: 4011229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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31
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32
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Török I, Simon G, Pap M. An evaluation of two years of clinical experience with ketoconazole. Mykosen 1982; 25:136-42. [PMID: 6283343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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33
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34
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Martos G, Pap M, Holló LV. [Incidence of consanguinity and endogamy in marriages among the population of Mezökövesd]. Orv Hetil 1981; 122:1957-9. [PMID: 7301363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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