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Buckley D, Molnár V, Németh G, Petneházy O, Vörös J. 'Monster… -omics': on segmentation, re-segmentation, and vertebrae formation in amphibians and other vertebrates. Front Zool 2013; 10:17. [PMID: 23577917 PMCID: PMC3637066 DOI: 10.1186/1742-9994-10-17] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Accepted: 04/02/2013] [Indexed: 11/10/2022] Open
Abstract
Background The axial skeleton is one of the defining evolutionary landmarks of vertebrates. How this structure develops and how it has evolved in the different vertebrate lineages is, however, a matter of debate. Vertebrae and vertebral structures are derived from the embryonic somites, although the mechanisms of development are different between lineages. Discussion Using the anecdotal description of a teratological newt (Triturus dobrogicus) with an unusual malformation in its axial skeleton, we review, compare, and discuss the development of vertebral structures and, in particular, the development of centra from somitic cellular domains in different vertebrate groups. Vertebrae development through re-segmentation of the somitic sclerotomal cells is considered the general mechanism among vertebrates, which has been generalized from studies in amniotic model organisms. The prevalence of this mechanism among anamniotes is, however, controversial. We propose alternative developmental mechanisms for vertebrae formation that should be experimentally tested. Summary Research in model organisms, especially amniotes, is laying the foundations for a thorough understanding of the mechanisms of development of the axial skeleton in vertebrates, foundations that should expand the extent of future comparative studies. Although immersed in the ‘-omics’ era, we emphasize the need for an integrative and organismal approach in evolutionary developmental biology for a better understanding of the causal role of development in the evolution of morphological diversity in nature.
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Érsek B, Molnár V, Balogh A, Matkó J, Cope AP, Buzás EI, Falus A, Nagy G. A3.20 TNF Regulates CD3ζ Expression of T Lymphocytes Via SRC-Like Adaptor Protein-Dependent Proteasomal Degradation. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-203216.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Sós E, Szigeti A, Fok É, Molnár V, Erdélyi K, Perge E, Biksi I, Gál J. Toxoplasmosis in Tammar wallabies (Macropus eugenii) in the Budapest Zoo and Botanical Garden (2006-2010). Acta Vet Hung 2012; 60:361-70. [PMID: 22903081 DOI: 10.1556/avet.2012.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Smaller macropodid species (commonly referred to as wallabies) are extremely susceptible to toxoplasmosis: in most cases, infection with Toxoplasma gondii leads to death within a short time. Between June 2006 and July 2010, T. gondii was detected by immunohistochemical examination in six Tammar wallabies (Macropus eugenii) that died in the Budapest Zoo and Botanical Garden; in another four specimens histopathology revealed T. gondii-like organisms (which could not be differentiated from Neospora caninum solely by morphology), and in another 11 animals toxoplasmosis as the possible cause of death could not be excluded. The current zoo population of 12 Tammar wallabies was tested for T. gondii IgG antibodies by the modified agglutination test (MAT), with negative results. We suppose that most of the deaths were due to acute toxoplasmosis resulting from a recent infection.
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Érsek B, Molnár V, Balogh A, Matkó J, Cope AP, Buzás EI, Falus A, Nagy G. CD3ζ-chain expression of human T lymphocytes is regulated by TNF via Src-like adaptor protein-dependent proteasomal degradation. THE JOURNAL OF IMMUNOLOGY 2012; 189:1602-10. [PMID: 22798681 DOI: 10.4049/jimmunol.1102365] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Decreased expression of the TCR ζ-chain has been reported in several autoimmune, inflammatory, and malignant diseases, suggesting that ζ-chain downregulation is common at sites of chronic inflammation. Although ζ-chain is critically important in T lymphocyte activation, the mechanism of the decreased ζ-chain expression is less clear. Src-like adaptor protein (SLAP) is a master regulator of T cell activation; previous data have reported that SLAP regulates immunoreceptor signaling. We have examined the mechanism and the functional consequences of CD3 ζ-chain downregulation. TNF treatment of human T lymphocytes (15-40 ng/ml) selectively downregulates CD3 ζ-chain expression in a dose-dependent manner (p < 0.05) and decreases activation-induced IL-2 expression (p < 0.01). Although blocking of the lysosomal compartment fails to restore TNF-induced CD3 ζ-chain downregulation, inhibition of the proteasome prevented the effect of TNF. Both SLAP expression and the colocalization of SLAP with CD3 ζ-chain was enhanced by TNF treatment (p < 0.05 and p < 0.01, respectively), whereas TNF-induced ζ-chain downregulation was inhibited by gene silencing of SLAP with small interfering RNA. SLAP levels of the CD4(+) T lymphocytes isolated from patients with rheumatoid arthritis were more than 2-fold higher than that of the healthy donors' (p < 0.05); moreover, TNF treatment did not alter the SLAP expression of the CD4(+) cells of anti-TNF therapy-treated patients. Our present data suggest that TNF modulates T cell activation during inflammatory processes by regulating the amount of CD3 ζ-chain expression via a SLAP-dependent mechanism. These data provide evidence for SLAP-dependent regulation of CD3 ζ-chain in the fine control of TCR signaling.
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Hornok S, Kovács R, Meli ML, Gönczi E, Hofmann-Lehmann R, Kontschán J, Gyuranecz M, Dán A, Molnár V. First detection of bartonellae in a broad range of bat ectoparasites. Vet Microbiol 2012; 159:541-3. [PMID: 22551590 DOI: 10.1016/j.vetmic.2012.04.003] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Accepted: 04/02/2012] [Indexed: 11/28/2022]
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Molnár V, Érsek B, Wiener Z, Tömböl Z, Szabó PM, Igaz P, Falus A. MicroRNA-132 targets HB-EGF upon IgE-mediated activation in murine and human mast cells. Cell Mol Life Sci 2012; 69:793-808. [PMID: 21853268 PMCID: PMC11114963 DOI: 10.1007/s00018-011-0786-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Revised: 07/13/2011] [Accepted: 07/19/2011] [Indexed: 01/01/2023]
Abstract
MicroRNAs provide an additional layer in the regulation of gene expression acting as repressors with several targets at the posttranscriptional level. This study describes microRNA expression patterns during differentiation and activation of mast cells. The expression levels of 567 different mouse miRNAs were compared by microarray between c-Kit+ committed progenitors, mucosal mast cells, resting and IgE-crosslinked BMMCs in vitro. The strongest upregulation of miR-132 upon IgE-mediated activation was validated in human cord blood-derived mast cells as well. HB-EGF growth factor also upregulated upon activation and was ranked high by more prediction algorithms. Co-transfection of miR-132 mimicking precursor and the 3'UTR of human Hbegf-containing luciferase vector proves that the predicted binding site is functional. In line with this, neutralization of miR-132 by anti-miR inhibitor leads to sustained production of HB-EGF protein in activated mast cells. Our data provide a novel example for negative regulation of a growth factor by an upregulated miRNA.
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Érsek B, Molnár V, Balogh A, Matkó J, Cope AP, Buzás EI, Falus A, Nagy G. CD3ζ-chain expression is regulated by tumor necrosis factor via Src-like adaptor protein dependent proteosomal degradation in human T lymphocytes. Ann Rheum Dis 2012. [DOI: 10.1136/annrheumdis-2011-201230.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Liptovszky M, Perge E, Molnár V, Sós E. Osteoblastic osteosarcoma in a Grey Mouse Lemur (Microcebus murinus) - short communication. Acta Vet Hung 2011; 59:433-7. [PMID: 22079704 DOI: 10.1556/avet.2011.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The Grey Mouse Lemur (Microcebus murinus) is a nocturnal lemur species that lives only in Madagascar. It is one of the most abundant lemur species and its native populations are not endangered, but animals belonging to this species are rarely exhibited in zoos. While tumours are quite frequently described in other primates, there are very few publications about neoplasia in lemurs. In this case report we describe a mandibular osteoblastic osteosarcoma in a Grey Mouse Lemur (Microcebus murinus). To the best of the authors' knowledge, this is the first scientific article describing osteosarcoma in a prosimian and also reporting a tumour in the mandible in this taxon.
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Aarons L, Sadler B, Pitsiu M, Sjövall J, Henriksson J, Molnár V. Population pharmacokinetic analysis of ropivacaine and its metabolite 2′,6′-pipecoloxylidide from pooled data in neonates, infants, and children. Br J Anaesth 2011; 107:409-24. [DOI: 10.1093/bja/aer154] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Molnár V. Maria-Elisabeth Krautwald-Junghanns, Michael Pees, Sven Reese and Thomas Tully (editors). Acta Vet Hung 2011. [DOI: 10.1556/avet.59.2011.2.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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36
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Molnár V, Pazár P, Rigó D, Máthé D, Fok E, Glávits R, Vajdovich P, Jacsó O, Balogh L, Sós E. Autochthonous Dirofilaria immitis infection in a ferret with aberrant larval migration in Europe. J Small Anim Pract 2010; 51:393-6. [PMID: 20626785 DOI: 10.1111/j.1748-5827.2010.00950.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A two-year-old male ferret (Mustela putorius furo) was presented to the Faculty of Veterinary Science, Szent István University, for investigation of somnolence. Following unsuccessful therapeutic attempts, the ferret was euthanased and a male Dirofilaria immitis worm was found in the pulmonary artery and a female D. immitis specimen in the subdural space of the cranial cavity. To the authors' knowledge, this is the first European record of D. immitis infection in a ferret, and the first case in which aberrant larval migration and consequent central nervous system signs were observed in a ferret in the course of D. immitis infection.
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Tömböl Z, Szabó PM, Molnár V, Wiener Z, Tölgyesi G, Horányi J, Riesz P, Reismann P, Patócs A, Likó I, Gaillard RC, Falus A, Rácz K, Igaz P. Integrative molecular bioinformatics study of human adrenocortical tumors: microRNA, tissue-specific target prediction, and pathway analysis. Endocr Relat Cancer 2009; 16:895-906. [PMID: 19546168 DOI: 10.1677/erc-09-0096] [Citation(s) in RCA: 138] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
MicroRNAs (miRs) are involved in the pathogenesis of several neoplasms; however, there are no data on their expression patterns and possible roles in adrenocortical tumors. Our objective was to study adrenocortical tumors by an integrative bioinformatics analysis involving miR and transcriptomics profiling, pathway analysis, and a novel, tissue-specific miR target prediction approach. Thirty-six tissue samples including normal adrenocortical tissues, benign adenomas, and adrenocortical carcinomas (ACC) were studied by simultaneous miR and mRNA profiling. A novel data-processing software was used to identify all predicted miR-mRNA interactions retrieved from PicTar, TargetScan, and miRBase. Tissue-specific target prediction was achieved by filtering out mRNAs with undetectable expression and searching for mRNA targets with inverse expression alterations as their regulatory miRs. Target sets and significant microarray data were subjected to Ingenuity Pathway Analysis. Six miRs with significantly different expression were found. miR-184 and miR-503 showed significantly higher, whereas miR-511 and miR-214 showed significantly lower expression in ACCs than in other groups. Expression of miR-210 was significantly lower in cortisol-secreting adenomas than in ACCs. By calculating the difference between dCT(miR-511) and dCT(miR-503) (delta cycle threshold), ACCs could be distinguished from benign adenomas with high sensitivity and specificity. Pathway analysis revealed the possible involvement of G2/M checkpoint damage in ACC pathogenesis. To our knowledge, this is the first report describing miR expression patterns and pathway analysis in sporadic adrenocortical tumors. miR biomarkers may be helpful for the diagnosis of adrenocortical malignancy. This tissue-specific target prediction approach may be used in other tumors too.
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Tölgyesi G, Molnár V, Semsei AF, Kiszel P, Ungvári I, Pócza P, Wiener Z, Komlósi ZI, Kunos L, Gálffy G, Losonczy G, Seres I, Falus A, Szalai C. Gene expression profiling of experimental asthma reveals a possible role of paraoxonase-1 in the disease. Int Immunol 2009; 21:967-75. [PMID: 19556304 DOI: 10.1093/intimm/dxp063] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this study, we aimed to identify novel genes involved in experimental and human asthma, importance of which has not yet been recognized. In an ovalbumin-induced murine model of asthma, we applied microarray gene expression analysis at different time points after allergen challenges. Advanced statistical methods were used to relate gene expression changes to cellular processes and to integrate our results into multiple levels of information available in public databases. At 4 h after the first allergen challenge, gene expression pattern reflected mainly an acute, but non-atopic, inflammatory response and strong chemotactic activity. At 24 h after the third allergen challenge, gene set enrichment analysis revealed significant over-representation of gene sets corresponding to T(h)2-type inflammation models. Among the top down-regulated transcripts, an anti-oxidant enzyme, paraoxonase-1 (PON1), was identified. In human asthmatic patients, we found that serum PON1 activity was reduced at exacerbation, but increased parallel with improving asthma symptoms. PON1 gene polymorphisms did not influence the susceptibility to the disease. Our observations suggest that an altered PON1 activity might be involved in the pathogenesis of asthma, and serum PON1 level might be used for following up the effect of therapy.
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Molnár V, Jánoska M, Harrach B, Glávits R, Pálmai N, Rigó D, Sós E, Liptovszky M. Detection of a novel bat gammaherpesvirus in Hungary. Acta Vet Hung 2008; 56:529-38. [PMID: 19149107 DOI: 10.1556/avet.56.2008.4.10] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
This paper describes the detection of a novel herpesvirus in a Serotine bat (Eptesicus serotinus) in Hungary. The rescued animal showed signs of icterus and anorexia and died within a day, in spite of immediate supportive therapy. Autopsy confirmed the clinical picture by the major lesions observed in the liver. Histopathology revealed vacuolar degeneration in the hepatocytes and leukocytosis in the sinusoidal lumina. By electron microscopy, hydropic degeneration and apoptotic cells with a pycnotic nucleus were found in the liver. Bacteriological examinations gave negative results. As part of a routine screening project, detection of adeno- and herpesviruses from homogenised samples of the liver, lungs and small intestines was attempted by nested polymerase chain reaction (PCR) assays. The adenovirus PCR ended with negative results. The herpesvirus PCR resulted in an amplification product of specific size. The nucleotide sequence of the amplicon was determined and analysed by homology search and phylogenetic analysis. A novel herpesvirus was identified, which seemed to be most closely related to members of the genus Rhadinovirus within the subfamily Gammaherpesvirinae. The causative role of the detected rhadinovirus in the fatal condition of the Serotine bat could not be proven, but it is most likely that reactivation from a latent infection allowed the detection of the virus by PCR.
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Molnár V, Billes F, Tyihák E, Ott P. Bioautographic detection of antimicrobial compounds in the edible Shiitake mushroom(Lentinus edodes). JPC-J PLANAR CHROMAT 2008. [DOI: 10.1556/jpc.21.2008.6.5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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41
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Molnár V, Tamási V, Bakos B, Wiener Z, Falus A. Changes in miRNA expression in solid tumors: An miRNA profiling in melanomas. Semin Cancer Biol 2008; 18:111-22. [DOI: 10.1016/j.semcancer.2008.01.001] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Molnár V, Billes F, Tyihák E, Mikosch H. Theoretical study on the vibrational spectra of methoxy- and formyl-dihydroxy-trans-stilbenes and their hydrolytic equilibria. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 69:542-58. [PMID: 17587638 DOI: 10.1016/j.saa.2007.05.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2007] [Revised: 04/26/2007] [Accepted: 05/01/2007] [Indexed: 05/16/2023]
Abstract
Compounds formed by exchanging one of the resveratrol hydroxy groups to methoxy or formyl groups are biologically important. Quantum chemical DFT calculations were applied for the simulation of some of their properties. Their optimized structures and charge distributions were computed. Based on the calculated vibrational force constants and optimized molecular structure infrared and Raman spectra were calculated. The characteristics of the vibrational modes were determined by normal coordinate analysis. Applying the calculated thermodynamic functions also for resveratrol, methanol, formaldehyde and water, thermodynamic equilibria were calculated for the equilibria between resveratrol and its methyl and formyl substituted derivatives, respectively.
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Falus A, Molnár V. Closer to the completed unity: messenger and microRNA profiling. An introduction. Semin Cancer Biol 2008; 18:77-8. [PMID: 18296066 DOI: 10.1016/j.semcancer.2008.01.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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44
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Hegyesi H, Colombo L, Pállinger E, Tóth S, Boer K, Molnár V, Falus A. Impact of systemic histamine deficiency on the crosstalk between mammary adenocarcinoma and T cells. J Pharmacol Sci 2007; 105:66-73. [PMID: 17895589 DOI: 10.1254/jphs.fp0070636] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
The purpose of the present study was to investigate the influence of lack of histamine (HA) on tumor growth and functions of T cells in order further to illustrate the mechanism of immunological tolerance induction by HA. We assessed the phenotype and cytokine production of splenic lymphocytes in syngeneic HA-free (histidine decarboxylase knock-out) (HDC KO) and wild-type mice, inoculated subcutaneously with the LM2 murine breast cancer cell line. Relative quantification of target mRNA was performed with a TaqMan real-time RT-PCR assay. The CD4(+)CD25(high+) Treg cell numbers were significantly smaller in the tumor-bearing KO mice than in the wild type ones measured by flow-cytometry. The expression of forkhead box P3 (Foxp3) decreased significantly and the copies of splenic Tbox-21 (T-bet) transcriptional factor mRNA was higher in HDC KO tumor-bearing mice than those of normal mice. The cytokine levels showed that a smaller number of interleukin-13-producing Th2 cells were elicited compared to interferon-gamma-producing Th1 cells in the tumor-bearing HDC KO mice. In conclusion, the present study demonstrates that endogenous histamine stimulates the growth of breast adenocarcinoma tumor implants in mice by suppressing anti-tumor immunity.
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MESH Headings
- Adenocarcinoma/metabolism
- Adenocarcinoma/pathology
- Adenocarcinoma/physiopathology
- Animals
- CD3 Complex/immunology
- Cell Communication/physiology
- Cell Differentiation/immunology
- Cell Line, Tumor
- Cytokines/genetics
- Cytokines/metabolism
- Enzyme-Linked Immunosorbent Assay
- Flow Cytometry
- Forkhead Transcription Factors/genetics
- Forkhead Transcription Factors/metabolism
- Histamine/deficiency
- Histidine Decarboxylase/genetics
- Histidine Decarboxylase/metabolism
- Immunophenotyping
- Interleukin-2 Receptor alpha Subunit/immunology
- Mammary Neoplasms, Experimental/metabolism
- Mammary Neoplasms, Experimental/pathology
- Mammary Neoplasms, Experimental/physiopathology
- Mice
- Mice, Inbred BALB C
- Mice, Knockout
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Spleen/cytology
- Spleen/immunology
- T-Box Domain Proteins/genetics
- T-Box Domain Proteins/metabolism
- T-Lymphocyte Subsets/immunology
- T-Lymphocyte Subsets/metabolism
- T-Lymphocyte Subsets/physiology
- T-Lymphocytes, Regulatory/immunology
- T-Lymphocytes, Regulatory/metabolism
- T-Lymphocytes, Regulatory/physiology
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Hegyesi H, Tóth S, Molnár V, Fülöp KA, Falus A. Endogenous and exogenous histamine influences on angiogenesis related gene expression of mice mammary adenocarcinoma. Inflamm Res 2007; 56 Suppl 1:S37-8. [PMID: 17806171 DOI: 10.1007/s00011-006-0518-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Hegyesi H, Horváth B, Pállinger E, Pós Z, Molnár V, Falus A. Histamine elevates the expression of Ets-1, a protooncogen in human melanoma cell lines through H2 receptor. FEBS Lett 2005; 579:2475-9. [PMID: 15848191 DOI: 10.1016/j.febslet.2005.03.053] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2004] [Revised: 02/17/2005] [Accepted: 03/08/2005] [Indexed: 01/17/2023]
Abstract
Histamine is known to act, at least in part, as a growth factor for several cell types, and as production of this biogen amine has been found to accelerate the rate of tissue proliferation in wound repair, embryogenesis and malignant growth. Abundant experimental and clinical data suggest that histamine augments in vivo tumour cell proliferation via histamine H2 receptors (H2R). Here, we report that exogenously added histamine stimulates Ets-1 (v-ets erythroblastosis virus E26 oncogene homolog 1) synthesis in human melanoma cells. Involvement of histamine receptors in the histamine induced ets-1 expression has been also studied. Our data show that these newly recognized actions of histamine are mediated by the H2R. Modification of local protooncogen Ets-1 level is likely being involved in the regulation of melanoma growth.
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Beregi A, Felkai C, Börzsönyi L, Molnár V. A preliminary study of the ultrasonographic determination of renal size in the guinea pig (Cavia porcellus). CONTEMPORARY TOPICS IN LABORATORY ANIMAL SCIENCE 2001; 40:50-2. [PMID: 11560406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
No standard kidney measurements studies are available for guinea pigs and other pet rodents. Because the size of the kidney often is altered due to diffuse parenchymal renal disease, standardized normal values may help in the ultrasonographic detection of renal enlargement or diminution in vivo. We obtained in vivo ultrasonographic renal measurements from 31 clinically healthy guinea pigs. A significant (P < 0.01) positive correlation was found between renal length and calculated volume compared to body weight (r = 0.459 to 0.535). Renal volume data were calculated from a single sagittal ultrasonographic image by using the area-length prolate ellipsoid mathematic model. Renal volume can be calculated from the data of the regression equation, and both linear and calculated volume measurements correlated to body weight.
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Beregi A, Molnár V, Perge E, Felkai C. Radiography and ultrasonography in the diagnosis and treatment of abdominal enlargements in five guinea pigs. J Small Anim Pract 2001; 42:459-63. [PMID: 11570391 DOI: 10.1111/j.1748-5827.2001.tb02503.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Five guinea pigs with palpable abdominal masses were examined by radiography and ultrasonography, and laparotomy was performed. Splenic haematoma, splenic and uterine haemangioma, uterine fibroma and ovarian teratoma were found on histological examination after excision of the relevant organs. Both of the imaging methods allowed localisation of the affected organs, but the inner structure of the masses could only be imaged by ultrasonography. Ultrasonography served as an aid in decision-making with respect to the laparotomy. Surgery was successful in four out of the five cases. Both imaging methods were found to be useful in diagnosis and in determining the choice of treatment in cases of abdominal masses in guinea pigs.
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Beregi A, Molnár V, Zorn S, Felkai C, Vörös K. Abdominal ultrasonography in pet guinea pigs. Acta Vet Hung 2001; 48:261-9. [PMID: 11402709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Ultrasonographic examination of 40 pet guinea pigs was performed in the framework of this study. Preparation of the patient for ultrasonography and the examination procedure are described. Normal ultrasonographic findings of the abdominal organs including the liver, spleen, kidney and urinary bladder are presented and illustrated for the first time in this species. Ultrasonography was found to be a useful investigative tool in the diagnosis of abdominal diseases in guinea pigs. In comparison to other diagnostic methods like physical examination including palpation, haematological examination, radiography and diagnostic laparotomy, ultrasonography offers a rapid, non-invasive and reliable means of diagnosing abdominal diseases in this species.
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Beregi A, Székely C, Békési L, Szabó J, Molnár V, Molnár K. Radiodiagnostic examination of the swimbladder of some fish species. Acta Vet Hung 2001; 49:87-98. [PMID: 11402694 DOI: 10.1556/004.49.2001.1.11] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Radiodiagnostic methods have not been used previously for studying the anatomy and diseases of the swimbladder of freshwater fish species. In this study, the radiographic anatomy of the swimbladder and species-related differences in swimbladder structure were studied on plain radiographs taken of 12 Hungarian fish species of major economic importance. Changes observed by radiography were also studied by conventional parasitological methods. The radiodiagnostic method reported here appears to be a useful complement to diagnostic examinations that have been based merely on dissection so far. It enables evaluation of the pathological lesions in live condition, without causing damage to the fish.
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