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Karagkouni M, Spilioti K, Meletis E, Kostoulas P, Koutinas C, Theodorou K, Breitschwerdt EB, Mylonakis ME. Assessment of the effect of long-term serum storage for retrospective serologic diagnosis of canine monocytic ehrlichiosis (Ehrlichia canis). Comp Immunol Microbiol Infect Dis 2024; 108:102170. [PMID: 38581930 DOI: 10.1016/j.cimid.2024.102170] [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: 01/27/2024] [Revised: 03/30/2024] [Accepted: 03/31/2024] [Indexed: 04/08/2024]
Abstract
There is currently sparse information on the possible effect of long-term storage of serum specimens for the retrospective serodiagnosis of canine monocytic ehrlichiosis (CME). The aim of this study was to assess the agreement between the original serologic outcome and the results of a repeat indirect fluorescent antibody (IFA) assay for the detection of IgG antibodies against E. canis. A secondary aim was to compare the diagnostic performance of two commercially available point-of-care (POC) immunochromatographic (IC) assays. Archived serum samples originally tested as positive (n=66) or negative (n=19) for E. canis IgG antibodies and kept frozen at -20°C for a median of 22 years, were retrospectively examined by IFA and by two POC IC assays. Cohen's Kappa coefficient (0.748, p < 0.0001), indicated a substantial agreement between the original and repeat serologic testing results. An almost identical high sensitivity and moderate specificity were established for the two POC IC assays. Canine serum specimens on long-term storage may still be of value for seroepidemiologic surveys investigating the exposure to E. canis.
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Affiliation(s)
- Melina Karagkouni
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki 54627, Greece
| | | | - Eleftherios Meletis
- Laboratory of Epidemiology and Artificial Intelligence, Faculty of Public and One Health, School of Health Sciences, University of Thessaly, Karditsa 43100, Greece
| | - Polychronis Kostoulas
- Laboratory of Epidemiology and Artificial Intelligence, Faculty of Public and One Health, School of Health Sciences, University of Thessaly, Karditsa 43100, Greece
| | - Christos Koutinas
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki 54627, Greece
| | - Konstantina Theodorou
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki 54627, Greece
| | - Edward B Breitschwerdt
- Intracellular Pathogens Research Laboratory, College of Veterinary Medicine, North Carolina State University, NC 27607, USA
| | - Mathios E Mylonakis
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki 54627, Greece.
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2
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Oikonomidis IL, Theodorou K, Papaioannou E, Xenoulis PG, Adamama-Moraitou KK, Steiner JM, Kritsepi-Konstantinou M, Suchodolski JS, Rallis T, Soubasis N. Serial measurement of cardiac troponin I in hospitalised dogs with canine parvoviral enteritis: Association with outcome and canine pancreas-specific lipase concentration. Res Vet Sci 2023; 157:1-5. [PMID: 36827790 DOI: 10.1016/j.rvsc.2023.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 01/19/2023] [Accepted: 02/14/2023] [Indexed: 02/19/2023]
Abstract
The aim of this study was to serially evaluate serum cardiac troponin I (cTnI) concentrations in dogs with parvoviral enteritis (CPVE), and investigate the association with outcome and serum pancreas-specific lipase (Spec cPL) concentrations. Dogs with CPVE that were hospitalised for at least 5 days were included. cTnI and Spec cPL concentrations were measured on days 1, 3 and 5 of hospitalisation. Twenty-nine dogs (20 survivors, 9 non-survivors) were included. Spec cPL was indicative of pancreatitis (>400 μg/L) on at least one day in 10/29 (34.5%) dogs. Serum median (range) cTnI concentration was higher (P = 0.021) in non-survivors on day 5 [0.032 (0.001-0.395) ng/mL] compared to day 1 [0.012 (0.003-0.196) ng/mL]. Non-survivors had higher (P = 0.014) cTnI concentrations on day 5 [0.032 (0.001-0.395) ng/mL] compared to survivors [0.001 (0.001-0.042) ng/mL], but not at admission or on day 3 (P > 0.05). Serum cTnI concentrations were not significantly different (P = 0.465) between the three Spec cPL groups [group 1 (Spec cPL ≤ 200 μg/L): 0.007 (0.001-0.527) ng/mL; group 2 (Spec cPL: 201-399 μg/L): 0.0045 (0.001-0.196) ng/mL; group 3 (Spec cPL ≥ 400 μg/L): 0.011 (0.001-0.278) ng/mL]. cTnI and Spec cPL concentrations were not significantly correlated (rho = -0.043, P = 0.703). Serial measurement of cTnI had prognostic value in the examined cohort. However, cTnI was not correlated with spec cPL.
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Affiliation(s)
- I L Oikonomidis
- Diagnostic Laboratory, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece.
| | - K Theodorou
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - E Papaioannou
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - P G Xenoulis
- Clinic of Medicine, Faculty of Veterinary Science, University of Thessaly, Karditsa, Greece; Gastrointestinal Laboratory, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, TX, USA
| | - K K Adamama-Moraitou
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - J M Steiner
- Gastrointestinal Laboratory, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, TX, USA
| | - M Kritsepi-Konstantinou
- Diagnostic Laboratory, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - J S Suchodolski
- Gastrointestinal Laboratory, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, TX, USA
| | - T Rallis
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - N Soubasis
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
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3
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Christodoulou V, Meletis E, Kostoulas P, Theodorou K, Saridomichelakis EN, Koutinas C, Mylonakis ME. Clinical and Clinicopathologic Discriminators Between Canine Acute Monocytic Ehrlichiosis and Primary Immune Thrombocytopenia. Top Companion Anim Med 2023; 52:100750. [PMID: 36574587 DOI: 10.1016/j.tcam.2022.100750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 09/08/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022]
Abstract
Acute canine monocytic ehrlichiosis due to Ehrlichia canis (aCME), and primary immune thrombocytopenia (pITP) are major differentials for dogs presented with thrombocytopenia, and the two diseases may clinically overlap. The aim of this study was to compare dogs diagnosed with naturally occurring aCME and pITP, to establish potentially useful clinical and clinicopathologic discriminators. A clinical record-based retrospective study was performed in 35 dogs diagnosed with aCME and 29 dogs with pITP. Dogs with aCME were significantly younger, and were more likely to experience depression or lethargy, anorexia, body weight loss, fever, lymphadenomegaly, tick infestation, and ocular discharge on admission, compared to dogs with pITP. In contrast, dogs with pITP presented more frequently with overt bleeding and had a significantly higher bleeding score compared to dogs with aCME. Dogs with aCME were more likely to be anemic and hypoalbuminemic on presentation compared to dogs with pITP. Dogs with pITP had higher white blood cell and neutrophil counts as well as lower platelet counts than dogs with aCME and were more likely to present with leukocytosis, neutrophilia and monocytosis. These clinical, hematological, and biochemical findings may be helpful discriminators between aCME and pITP, on the understanding that they will be interpreted in the context of disease-specific testing.
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Affiliation(s)
- Vasilios Christodoulou
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (CAC-AUTh), Thessaloniki, Greece
| | - Eleftherios Meletis
- Laboratory of Epidemiology, School of Public and One (Integrated) Health, School of Health Sciences, University of Thessaly, Karditsa, Greece
| | - Polychronis Kostoulas
- Laboratory of Epidemiology, School of Public and One (Integrated) Health, School of Health Sciences, University of Thessaly, Karditsa, Greece
| | | | | | - Christos Koutinas
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (CAC-AUTh), Thessaloniki, Greece
| | - Mathios E Mylonakis
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (CAC-AUTh), Thessaloniki, Greece.
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4
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Iliopoulos P, Kyrgias G, Simopoulou F, Tsougos I, Theodorou K. QUANTIFICATION OF CBCT PATIENT DOSE: A SYSTEMATIC REVIEW ON MEASUREMENT METHODOLOGY AND PROTOCOLS. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03101-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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5
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Raptis S, Softa V, Ilioudis C, Tsougos I, Kyrgias G, Simopoulou F, Theodorou K. ARTIFICIAL INTELLIGENCE IN LUNG RADIOTHERAPY. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03162-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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6
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Tsougos I, Michaliou M, Vassiou K, Tsivaka D, Vamvakas A, Tzortzis V, Theodorou K, Vlychou M. ULTRA-HIGH (B1,600), MULTI-B-VALUE (B500, B800, B1,000) AND SYNTHETIC B-VALUE DIFFUSION WEIGHTED IMAGING COMPARISON, IN MULTI-PARAMETRIC PROSTATE CANCER MRI. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03111-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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7
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Tsougos I, Michaliou M, Softa V, Samaras D, Topaltzikis T, Kappas C, Tsapaki V, Theodorou K. IMPLEMENTATION OF AN AUTOMATED REMOTE QUALITY CONTROL PROGRAM FOR RADIOGRAPHY AND MAMMOGRAPHY EQUIPMENT IN GREECE. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03055-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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8
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Softa V, Tyrakis C, Kappas C, Theodorou K. MEASUREMENT OF EXPOSURE LEVELS IN URBAN AREAS FROM 5G TECHNOLOGY: INITIAL EXPERIENCE. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03152-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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9
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Michaliou M, Tsivaka D, Vlychou M, Vassiou K, Theodorou K, Tsougos I. CROSS VALIDATION OF A “HOME-MADE” KIWI-FRUIT PHANTOM FOR THE PROSTATE BETWEEN TWO 3T MRI SCANNERS. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)03189-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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10
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Kohnle C, Theodorou K, Koziarek S, Sommer J, Busscher D, Wagner JUG, Wittig I, Dimmeler S, Boon RA. The novel ageing-induced long non-coding RNA MIRIAL controls endothelial cell and mitochondrial function. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.3023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Vascular ageing is a key risk factor for cardiovascular diseases and is characterised by a continuous decline in endothelial cell function. Despite progress in recent years, the molecular mechanisms for this deterioration remain incompletely understood. Long non-coding RNAs (lncRNAs) are a heterogeneous class of RNAs that have been shown to regulate gene expression and protein function, however, little is known about their role in the ageing-associated dysregulation of endothelial cell (EC) function. In this study, we aimed to identify and functionally characterise a novel ageing-regulated lncRNA in ECs.
Using RNA sequencing data of cardiac ECs derived from 12 weeks young and 20 months old mice, we identified Mirial as an ageing-induced lncRNA (1.32-fold, p=0.00005). Mirial is conserved between mice and humans and has no obvious coding potential. GapmeR-mediated silencing of MIRIAL in human umbilical vein ECs (HUVECs) decreased cell proliferation by 50%, migration by 24% (p=0.045) and basal angiogenic sprouting by 53% (p=0.0029), without affecting apoptosis or senescence. Additionally, silencing of MIRIAL increases mitochondrial mass (1.8-fold, p<0.01) and spare respiratory capacity (1.95-fold). Preliminary data from the hearts of Mirial knockout mice confirm the elevated mitochondrial mass after Mirial ablation (1.26-fold, p=0.05). In HUVECS, MIRIAL is mainly associated with the chromatin (80%), suggesting a role in the regulation of gene expression. Pathway analysis showed an overrepresentation of p53 target genes that were upregulated upon MIRIAL knockdown, which was validated using qRT-PCR (1.8–5.2-fold increases). Interestingly, this effect is fully dependent on the presence of p53. Moreover, p53 and phospho-p53 (Ser15) were both increased (1.8-fold, p=0.01 and 2.9-fold, p=0.02, respectively) after MIRIAL silencing. Pulldown of MIRIAL identified DDX5 and MRPL41 as direct p53 interactors and RNA immunoprecipitation revealed that MIRIAL physically interacts with p53 (3.75-fold enrichment, p<0.01). Gene set enrichment analysis of RNA sequencing data revealed that 10% of deregulated genes after MIRIAL knockdown have a binding site for Forkhead Box O (FoxO) transcription factors. In particular, FoxO1 is known as one of the key players in endothelial proliferation and regulation of angiogenesis as well as in mitochondrial biogenesis.
Taken together, MIRIAL is an ageing-induced lncRNA in endothelial cells acting as a key regulator of metabolic and cellular function. MIRIAL promotes cell proliferation, migration and basal angiogenic sprouting while decreasing mitochondrial function. We hypothesise that MIRIAL influences these cellular functions by affecting the p53 pathway and mitochondrial respiration through FoxO signalling. The results from the present study suggest that modulation of cellular MIRIAL expression may be a promising strategy to prevent or even reverse ageing-induced functional decline of ECs, both in vitro and in vivo.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Deutsche Forschungsgemeinschaft - Collaborative Research Centre (SFB) 834 - Project B9Deutsche Forschungsgemeinschaft - Collaborative Research Centre/Transregio (TRR) 267 - Project B4
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Affiliation(s)
- C Kohnle
- Johann Wolfgang Goethe University, Institute of Cardiovascular Regeneration , Frankfurt am Main , Germany
| | - K Theodorou
- Johann Wolfgang Goethe University, Institute of Cardiovascular Regeneration , Frankfurt am Main , Germany
| | - S Koziarek
- Johann Wolfgang Goethe University, Institute of Cardiovascular Regeneration , Frankfurt am Main , Germany
| | - J Sommer
- Johann Wolfgang Goethe University, Institute of Cardiovascular Regeneration , Frankfurt am Main , Germany
| | - D Busscher
- VU University Medical Center, Department of Physiology , Amsterdam , The Netherlands
| | - J U G Wagner
- Johann Wolfgang Goethe University, Institute of Cardiovascular Regeneration , Frankfurt am Main , Germany
| | - I Wittig
- Johann Wolfgang Goethe University, Functional Proteomics, Faculty of Medicine , Frankfurt am Main , Germany
| | - S Dimmeler
- Johann Wolfgang Goethe University, Institute of Cardiovascular Regeneration , Frankfurt am Main , Germany
| | - R A Boon
- VU University Medical Center, Department of Physiology , Amsterdam , The Netherlands
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11
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Tsouloufi TK, Theodorou K, Day MJ, Oikonomidis IL, Kasabalis D, Mylonakis ME, Saridomichelakis MN, Kritsepi-Konstantinou M, Soubasis N. Prevalence of antinuclear antibodies and rheumatoid factor titers in dogs with arthritis secondary to leishmaniosis ( Leishmania infantum). J Vet Diagn Invest 2022; 34:699-702. [PMID: 35655443 DOI: 10.1177/10406387221099030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Dogs with infectious arthritis may occasionally exhibit positive serum antinuclear antibody (ANA) and rheumatoid factor (RF) titers; however, relevant data are sparse for arthritis secondary to canine leishmaniosis (CanL) caused by Leishmania infantum. We determined the prevalence of positive serum ANA and RF titers in dogs with arthritis secondary to CanL. Blood samples from adult, client-owned dogs with purulent arthritis secondary to CanL, without any comorbidities, were collected for diagnostic purposes. Serum ANA titers were measured by immunoperoxidase test and RF titers by the Rose-Waaler latex test. Twelve of 23 dogs enrolled prospectively in our study had clinical arthritis, and 11 of 23 had subclinical arthritis. Based on LeishVet clinical staging, 7 dogs had clinical stage II disease, 11 had clinical stage III disease, and 5 had stage IV. None of the 23 dogs was seropositive for ANA; 3 of 23 were positive for RF. ANA and/or RF seropositivity, in dogs with CanL-associated arthritis, appears to be weak, if present at all. Based on our results, positive serum ANA and RF titers should not be expected in dogs with arthritis secondary to CanL.
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Affiliation(s)
- Theodora K Tsouloufi
- Diagnostic Laboratory, and Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Konstantina Theodorou
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Michael J Day
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, Western Australia, Australia
| | - Ioannis L Oikonomidis
- Diagnostic Laboratory, and Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Dimitrios Kasabalis
- Clinic of Medicine, Faculty of Veterinary Sciences, University of Thessaly, Karditsa, Greece
| | - Mathios E Mylonakis
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | - Maria Kritsepi-Konstantinou
- Diagnostic Laboratory, and Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Nectarios Soubasis
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
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12
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Kohnle C, Theodorou K, Koziarek S, Busscher D, Sommer J, Wagner JUG, Wittig I, Dimmeler S, Boon RA. The novel ageing-induced long non-coding RNA MIRIAL controls endothelial cell and mitochondrial function. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.3356] [Citation(s) in RCA: 2] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Vascular ageing is a key risk factor for cardiovascular diseases and is characterised by a continuous decline in endothelial function. Despite progress in recent years, the molecular mechanisms for this deterioration remain incompletely understood. Long non-coding RNAs (lncRNAs) are a heterogeneous class of RNAs that have been shown to regulate gene expression and protein function, however, little is known about their role in the ageing-associated dysregulation of endothelial cell (EC) function.
In this study, we aimed to identify and functionally characterise a novel ageing-regulated lncRNA in ECs.
Using RNA sequencing data of cardiac ECs from 12 weeks young and 20 months old mice, we identified Mirial as an ageing-induced lncRNA (1.32-fold, p=0.ehab724.33565). MIRIAL is conserved between mice and humans and has no obvious coding potential. GapmeR-mediated silencing of MIRIAL in human umbilical vein ECs (HUVECs) decreased cell proliferation by 50%, migration by 24% (p=0.045) and basal angiogenic sprouting by 53% (p=0.0029), while increasing VEGF-A-stimulated sprouting by 50% (p=0.0139) and not affecting apoptosis or senescence. Subcellular fractionation of HUVECs revealed that MIRIAL was predominantly associated with the chromatin (80%). Pathway analysis of RNA sequencing data showed an overrepresentation of upregulated p53 target genes upon MIRIAL knockdown in HUVECs which was validated using qRT-PCR (1.8–5.2-fold increased). Using siRNA against p53 we showed that this effect is fully dependent on the presence of p53. Moreover, p53 and its phosphorylated form (Ser15) were both increased (1.8-fold, p=0.01 and 2.9-fold, p=0.02) after MIRIAL silencing. Intriguingly, RNA immunoprecipitation revealed that MIRIAL physically interacts with p53 (3.75-fold enriched, p=0.0067). To further study the interactome of MIRIAL, we performed RNA pulldown assays followed by mass spectrometry analysis of bound proteins, which identified the ageing-associated prohibitin (PHB) 1 and 2 to potentially interact with MIRIAL. Similar to MIRIAL knockdown, siRNA-mediated PHB 1 or 2 silencing caused proliferative defects. Further, PHBs are known to physically interact with p53 and control mitochondrial metabolism, a key factor in cellular ageing. Interestingly, silencing of MIRIAL in HUVECs increased mitochondrial mass (1.8-fold, p=0.0008) and spare respiratory capacity (1.95-fold) with the latter being decreased in isolated aged murine ECs.
Taken together, MIRIAL is an ageing-induced lncRNA in ECs acting as a key regulator of metabolic and cellular function. MIRIAL promotes cell proliferation, migration and basal angiogenic sprouting while decreasing mitochondrial function and VEGF-A-stimulated sprouting. We hypothesise that MIRIAL influences p53 signalling and mitochondrial respiration through PHB 1 and 2. The present study suggests that modulation of MIRIAL expression may be a promising strategy to prevent or even reverse ageing-induced functional decline of ECs.
Funding Acknowledgement
Type of funding sources: Public grant(s) – EU funding. Main funding source(s): European Research Council (ERC) Starting Grant: Non-coding RNA in Vascular Ageing (NOVA)
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Affiliation(s)
- C Kohnle
- Johann Wolfgang Goethe University, Institute of Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - K Theodorou
- Johann Wolfgang Goethe University, Institute of Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - S Koziarek
- Johann Wolfgang Goethe University, Institute of Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - D Busscher
- Johann Wolfgang Goethe University, Institute of Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - J Sommer
- Johann Wolfgang Goethe University, Institute of Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - J U G Wagner
- Johann Wolfgang Goethe University, Institute of Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - I Wittig
- Johann Wolfgang Goethe University, Frankfurt, Germany
| | - S Dimmeler
- Johann Wolfgang Goethe University, Institute of Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - R A Boon
- VU University Medical Center, Department of Physiology, Amsterdam, Netherlands (The)
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13
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Oikonomidis IL, Theodorou K, Papaioannou E, Xenoulis PG, Adamama-Moraitou KK, Steiner JM, Kritsepi-Konstantinou M, Suchodolski JS, Rallis T, Soubasis N. Serial measurement of thyroid hormones in hospitalised dogs with canine parvoviral enteritis: Incidence of non-thyroidal illness syndrome and its association with outcome and systemic inflammatory response syndrome. Vet J 2021; 274:105715. [PMID: 34252549 DOI: 10.1016/j.tvjl.2021.105715] [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: 12/14/2020] [Revised: 06/30/2021] [Accepted: 07/06/2021] [Indexed: 12/25/2022]
Abstract
The aim of this study was to serially evaluate the serum concentrations of total thyroxine (tT4), free thyroxine (fT4) and thyroid-stimulating hormone (TSH) in dogs with canine parvoviral enteritis (CPVE) during a 5-day hospitalisation period and assess the association of these hormone concentrations with the outcome and the development of systemic inflammatory response syndrome (SIRS). Dogs with confirmed CPVE that were hospitalised for at least 5 days were included. The thyroid hormones concentrations were measured on days 1, 3 and 5 of hospitalisation. Twenty-eight dogs were included. All (28/28, 100%), 19/28 (69.7%) and 23/28 (82.1%) dogs had a low serum tT4, fT4 and TSH concentration, respectively, on at least 1 day during the hospitalisation period. Overall, 11/28 (39.3%) dogs were diagnosed with SIRS on at least 1 day. In survivors, serum tT4 concentration was significantly higher on day 5 (median, range: 11.8 nmol/L, <6.4-32.2 nmol/L) compared to those on days 1 (<6.4 nmol/L, <6.4-20.1 nmol/L; P = 0.010) or 3 (7.6 nmol/L, <6.4-25.2 nmol/L; P = 0.019). Survivors had a significantly higher tT4 concentration (median, range: 11.8 nmol/L, <6.4-32.2 nmol/L) on day 5 compared to non-survivors (<6.4 nmol/L, <6.4-7.2 nmol/L; P = 0.002). Regardless of the day of hospitalisation, dogs with SIRS had significantly lower tT4 (<6.4 nmol/L, <6.4-16.3 nmol/L) compared to dogs without SIRS (8.6 nmol/L, <6.4-32.2 nmol/L; P = 0.006). A significant difference was also found in fT4 between dogs with SIRS (<3.9 pmol/L, <3.9-16.2 pmol/L) and dogs without SIRS (15.1 pmol/L, <3.9-59.2; pmol/L; P < 0.001). Non-thyroidal illness syndrome was frequently observed in dogs with CPVE, and a negative association between tT4 and fT4 concentrations and SIRS was noted. Serial measurements of tT4 concentrations appeared to have prognostic value.
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Affiliation(s)
- I L Oikonomidis
- Easter Bush Pathology, The Royal (Dick) School of Veterinary Studies and The Roslin Institute, University of Edinburgh, Roslin, UK; Diagnostic Laboratory, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece.
| | - K Theodorou
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - E Papaioannou
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - P G Xenoulis
- Clinic of Medicine, Faculty of Veterinary Science, University of Thessaly, Karditsa, Greece; Gastrointestinal Laboratory, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, Texas, USA
| | - K K Adamama-Moraitou
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - J M Steiner
- Gastrointestinal Laboratory, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, Texas, USA
| | - M Kritsepi-Konstantinou
- Diagnostic Laboratory, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - J S Suchodolski
- Gastrointestinal Laboratory, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, Texas, USA
| | - T Rallis
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - N Soubasis
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Liatis T, Theodorou K, Kasabalis D, Soubasis N, Panopoulos I, Polizopoulou Z. What Is Your Neurologic Diagnosis? J Am Vet Med Assoc 2021; 258:1337-1340. [PMID: 34061617 DOI: 10.2460/javma.258.12.1337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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Pasias IN, Theodorou K, Raptopoulou KG, Evaggelaras C, Floros G, Ladavos A, Asimakopoulos AG, Calokerinos AC, Proestos C. Rapid, Low-Cost Spectrophotometric Characterization of Olive Oil Quality to Meet Newly Implemented Compliance Requirements. ANAL LETT 2021. [DOI: 10.1080/00032719.2021.1925679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- I. N. Pasias
- General Chemical Lab of Research and Analysis, Lamia, Greece
| | - K. Theodorou
- Laboratory of Food Technology, Department of Business Administration of Food and Agricultural Enterprises, University of Patras, Patras, Greece
| | | | - Ch. Evaggelaras
- Lamos, Extra Virgin Olive Oil Enterprise, Raches, Fthiotida, Greece
| | - G. Floros
- Lamos, Extra Virgin Olive Oil Enterprise, Raches, Fthiotida, Greece
| | - A. Ladavos
- Laboratory of Food Technology, Department of Business Administration of Food and Agricultural Enterprises, University of Patras, Patras, Greece
| | - A. G. Asimakopoulos
- Department of Chemistry, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - A. C. Calokerinos
- Department of Chemistry, Food Chemistry Laboratory, National and Kapodistrian University of Athens, Athens, Greece
| | - Ch. Proestos
- Department of Chemistry, Food Chemistry Laboratory, National and Kapodistrian University of Athens, Athens, Greece
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Alkhorayef M, Sulieman A, Barakat H, Al-Mohammed H, Theodorou K, Kappas C, Bradley D. Urethrographic examinations: Patient and staff exposures and associated radiobiological risks. Saudi J Biol Sci 2021; 28:35-39. [PMID: 33424280 PMCID: PMC7785443 DOI: 10.1016/j.sjbs.2020.08.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 06/20/2020] [Revised: 07/22/2020] [Accepted: 08/16/2020] [Indexed: 11/25/2022] Open
Abstract
Medical exposure of the general population due to radiological investigations is the foremost source of all artificial ionising radiation. Here, we focus on a particular diagnostic radiological procedure, as only limited data are published with regard to radiation measurements during urethrograpic imaging. Specifically, this work seeks to estimate patient and occupational effective doses during urethrographic procedures at three radiology hospitals. Both staff and patient X-ray exposure levels were calculated in terms of entrance surface air kerma (ESAK), obtained by means of lithium fluoride thermoluminescent dosimeters (TLD-100(LiF:Mg:Cu.P)) for 243 urethrographic examinations. Patient radiation effective doses per procedure were estimated using conversion factors obtained from the use of Public Health England computer software. In units of mGy, the median and range of ESAK per examination were found to be 10.8 (3.6-26.2), 7.0 (0.2-32.3), and 24.3 (9.0-32.0) in Hospitals A, B, and C, respectively. The overall mean and range of staff doses (in µGy) were found to be 310 (4.0-1750) per procedure. With the exception of hospital C, the present evaluations of radiation dose have been found to be similar to those of previously published research. The wide range of patient and staff doses illustrate the need for radiation dose optimisation.
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Affiliation(s)
- M. Alkhorayef
- Department of Radiological Sciences, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia
| | - A. Sulieman
- Prince Sattam Bin Abdulaziz University, College of Applied Medical Sciences, Radiology and Medical Imaging Department, P.O. Box 422, Alkharj 11942, Saudi Arabia
| | - H. Barakat
- Medical Physics Department, Faculty of Science and Technology, Al-Neelain University, Khartoum, Sudan
| | - H.I. Al-Mohammed
- Department of Radiological Sciences, College of Health and Rehabilitation Sciences, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - K. Theodorou
- Department of Medical Physics, Medical School, University of Thessaly, Larissa, Greece
| | - C. Kappas
- Department of Medical Physics, Medical School, University of Thessaly, Larissa, Greece
| | - D. Bradley
- Centre for Nuclear and Radiation Physics, Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, UK
- Sunway University, Centre for Biomedical Physics, Jalan Universiti, 46150 PJ, Malaysia
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17
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Giapitzoglou S, Saridomichelakis MN, Leontides LS, Kasabalis D, Chatzis M, Apostolidis K, Theodorou K, Roumpeas E, Mylonakis ME. Evaluation of serum symmetric dimethylarginine as a biomarker of kidney disease in canine leishmaniosis due to Leishmania infantum. Vet Parasitol 2019; 277:109015. [PMID: 31874403 DOI: 10.1016/j.vetpar.2019.109015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 09/29/2019] [Revised: 12/16/2019] [Accepted: 12/17/2019] [Indexed: 02/07/2023]
Abstract
Canine leishmaniosis (CanL)-associated chronic kidney disease is a leading cause of morbidity and mortality in Mediterranean countries. Novel renal biomarkers, such as serum symmetric dimethylarginine (sSDMA), may be useful surrogates for the detection of renal functional impairment. The objectives of this study were to investigate sSDMA concentrations in dogs with CanL, with and without azotemia, and to establish any potential association with the prevalence and severity of proteinuria, with the prevalence of decreased urine specific gravity and with the LeishVet clinical stages of CanL. Serum samples from 68 dogs with CanL (50 nonazotemic and 18 azotemic) and 17 healthy dogs were retrospectively examined. Increased sSDMA was documented in 26 % of dogs with CanL without azotemia and in 83.3 % of dogs with azotemia. Serum SDMA was significantly higher in azotemic compared to nonazotemic dogs and was associated with the presence and severity of proteinuria, the decreased urine specific gravity and the advanced clinical stages of CanL. The results of the present study indicate that sSDMA may be a useful adjunct to serum creatinine and urine protein/creatinine ratio for the detection of CanL-associated nephropathy, but it is of limited value for distinguishing among the LeishVet clinical stages of CanL.
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Affiliation(s)
- Smaro Giapitzoglou
- Companion Animal Clinic, School of Veterinary Medicine, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Str., 54627, Thessaloniki, Greece
| | - Manolis N Saridomichelakis
- Clinic of Medicine, School of Veterinary Science, University of Thessaly (CM-UTh), 224 Trikalon Str., 43132, Karditsa, Greece
| | - Leonidas S Leontides
- Laboratory of Epidemiology, Biostatistics and Animal Health Economics, School of Veterinary Science, University of Thessaly, 224 Trikalon Str., 43132, Karditsa, Greece
| | - Dimitris Kasabalis
- Clinic of Medicine, School of Veterinary Science, University of Thessaly (CM-UTh), 224 Trikalon Str., 43132, Karditsa, Greece
| | - Manolis Chatzis
- Clinic of Medicine, School of Veterinary Science, University of Thessaly (CM-UTh), 224 Trikalon Str., 43132, Karditsa, Greece
| | - Kosmas Apostolidis
- Clinic of Medicine, School of Veterinary Science, University of Thessaly (CM-UTh), 224 Trikalon Str., 43132, Karditsa, Greece
| | - Konstantina Theodorou
- Companion Animal Clinic, School of Veterinary Medicine, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Str., 54627, Thessaloniki, Greece
| | - Efstathios Roumpeas
- Companion Animal Clinic, School of Veterinary Medicine, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Str., 54627, Thessaloniki, Greece
| | - Mathios E Mylonakis
- Companion Animal Clinic, School of Veterinary Medicine, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Str., 54627, Thessaloniki, Greece.
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Vamvakas A, Williams S, Theodorou K, Kapsalaki E, Fountas K, Kappas C, Vassiou K, Tsougos I. Imaging biomarker analysis of advanced multiparametric MRI for glioma grading. Phys Med 2019; 60:188-198. [DOI: 10.1016/j.ejmp.2019.03.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 02/27/2019] [Accepted: 03/17/2019] [Indexed: 01/29/2023] Open
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19
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Vagena E, Katsaras P, Theodorou K, Stoulos S. AMBIENT DOSE EQUIVALENT RECEIVED AT 15 MV LINAC ENVIRONMENTS DUE TO PHOTONEUTRONS CONTAMINATION. Radiat Prot Dosimetry 2018; 182:472-479. [PMID: 29961846 DOI: 10.1093/rpd/ncy104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 06/08/2018] [Indexed: 06/08/2023]
Abstract
Mapping of the photoneutron spectrum and flux performed at several positions over the treatment table of a 15 MV medical linac. Neutron activation technique has been applied to obtain the neutron spectra in the mixed γ -n field. Thick foils have been used due to the low neutron flux and the measurements were unfolded using the MINUIT minimizer. GEANT4 code simulations have been performed to reproduce the photoneutrons' spectrum and estimate the flux along the treatment table. The mixed radiation field around medical linear accelerator was evaluated and the variation of the ambient dose equivalent over the treatment table was estimated. Photoneutrons' ambient dose equivalent inside the irradiation field estimated as 0.56 ± 0.05 while the peripheral as 0.42 ± 0.04 mSv Gy-1. The effective dose inside the irradiation field is ranged between 0.004 and 0.049 while the peripheral up to 0.035 mSv Gy-1.
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Affiliation(s)
- E Vagena
- Laboratory of Atomic and Nuclear Physics, School of Physics, Aristotle University, Thessaloniki, Greece
| | - P Katsaras
- Laboratory of Atomic and Nuclear Physics, School of Physics, Aristotle University, Thessaloniki, Greece
| | - K Theodorou
- Schools of Medicine, University of Thessaly, Larisa, Greece
| | - S Stoulos
- Laboratory of Atomic and Nuclear Physics, School of Physics, Aristotle University, Thessaloniki, Greece
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Sulieman A, Elhag B, Alkhorayef M, Babikir E, Theodorou K, Kappas C, Bradley D. Estimation of effective dose and radiation risk in pediatric barium studies procedures. Appl Radiat Isot 2017; 138:40-44. [PMID: 28757351 DOI: 10.1016/j.apradiso.2017.07.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 01/31/2017] [Revised: 07/05/2017] [Accepted: 07/07/2017] [Indexed: 02/07/2023]
Abstract
The objectives of this study are to assess pediatric radiation exposure in certain barium studies and to quantify the organ and effective doses and radiation risk resultant from patients' irradiation. A total of 69 pediatric barium studies for upper and lower gastrointestinal tract. Patients' radiation dose was quantified in terms of Entrance surface air kerma (ESAKs) using exposure parameters and DosCal software. Organ and effective doses (E) were extrapolated using national Radiological Protection Board software (NRPB-R279). The mean ± (SD) and the range of patient doses per procedure were 3.7 ± 0.4 (1.0-13.0)mGy, 7.4 ± 1.7(5.5-8.0)mGy and 1.4 ± 0.9 (0.5-3.6)mGy for barium meal, swallow and enema, respectively. The mean effective doses were 0.3 ± 0.03 (0.08-1.1)mSv, 0.2 ± 1.6 (0.44-0.7)mSv and 0.3 ± 0.9 (0.1-0.8)mSv at the same order. The radiation dose were higher compared to previous studies. Therefore, pediatrics are exposed to avoidable radiation exposure. Certain optimization measures are recommended along with establishing national diagnostic reference level (DRL) to reduce the radiation risk.
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Affiliation(s)
- A Sulieman
- Prince Sattam bin Abdulaziz University, College of Applied Medical Sciences, Radiology and Medical Imaging Department, P.O.Box 422, 11942, Saudi Arabia.
| | - B Elhag
- Alghad International Colleges for Applied Medical Sciences, Radiology and Medical Imaging Department, Almadinah Almunawra, Saudi Arabia
| | - M Alkhorayef
- King Saud University, College of Applied Medical Sciences, Radiological Sciences Department, P.O.Box 10219, Riyadh 11433, Saudi Arabia; Centre for Nuclear and Radiation Physics, Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
| | - E Babikir
- King Saud University, College of Applied Medical Sciences, Radiological Sciences Department, P.O.Box 10219, Riyadh 11433, Saudi Arabia
| | - K Theodorou
- Medical Physics Department, University Hospital of Larissa, PO Box 1425, Larissa 41110, Greece
| | - C Kappas
- Medical Physics Department, University Hospital of Larissa, PO Box 1425, Larissa 41110, Greece
| | - D Bradley
- Centre for Nuclear and Radiation Physics, Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom; Sunway University, Institute for Health Care Development, Jalan Universiti, 46150 PJ, Malaysia
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Sulieman A, Babikir E, Alrihaima N, Alkhorayef M, Dalton A, Bradley D, Theodorou K. Radiation exposure in pediatric patients during micturating cystourethrography procedures. Appl Radiat Isot 2016; 117:36-41. [PMID: 27094250 DOI: 10.1016/j.apradiso.2016.03.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 03/26/2016] [Accepted: 03/29/2016] [Indexed: 11/18/2022]
Affiliation(s)
- A Sulieman
- Prince Sattam bin Abdulaziz University, College of Applied Medical Sciences, Radiology and Medical Imaging Department, P.O.Box 422, Alkharj 11942, Saudi Arabia.
| | - E Babikir
- Radiological Sciences Department, College of Applied Medical Sciences, King Saud University, P.O.Box 10219, Riyadh 11433, Saudi Arabia
| | - N Alrihaima
- Sudan Atomic Energy Commission, P.O.Box 55, Khartoum, Sudan
| | - M Alkhorayef
- Radiological Sciences Department, College of Applied Medical Sciences, King Saud University, P.O.Box 10219, Riyadh 11433, Saudi Arabia
| | - A Dalton
- Centre for Nuclear and Radiation Physics, Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, UK
| | - D Bradley
- Centre for Nuclear and Radiation Physics, Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, UK
| | - K Theodorou
- Medical Physics Department, University Hospital of Larissa, PO Box 1425, Larissa 41110, Greece
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Kalogianni L, Koutinas CK, Theodorou K, Xenoulis PG, Suchodolski JS, Harrus S, Steiner JM, Siarkou VI, Mylonakis ME. Cardiac troponin I concentrations, electrocardiographic and echocardiographic variables remained unchanged in dogs experimentally infected with Ehrlichia canis. Vet J 2016; 217:109-111. [PMID: 27810200 DOI: 10.1016/j.tvjl.2016.09.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 05/16/2016] [Revised: 09/22/2016] [Accepted: 09/26/2016] [Indexed: 11/19/2022]
Abstract
Canine monocytic ehrlichiosis (CME, Ehrlichia canis) has occasionally been associated with myocardial injury. The aim of the present study was to serially measure and evaluate cardiac troponin I (cTnI) concentrations in dogs with experimentally induced acute and subclinical CME and to evaluate potential associations between cTnI concentration and an array of echocardiographic and electrocardiographic parameters. Serum cTnI concentration and simultaneous echocardiographic and electrocardiographic recordings were evaluated in 12 healthy Beagle dogs prior to experimental infection and on days 20 and 90 post-inoculation with E. canis. Almost all serum cTnI concentrations were below the limit of detection and selected electrocardiographic and echocardiographic parameters remained unchanged throughout the study.
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Affiliation(s)
- Lamprini Kalogianni
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (SVM-AUTh), 11 Stavrou Voutyra Street, 54627, Thessaloniki, Greece
| | - Christos K Koutinas
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (SVM-AUTh), 11 Stavrou Voutyra Street, 54627, Thessaloniki, Greece.
| | - Konstantina Theodorou
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (SVM-AUTh), 11 Stavrou Voutyra Street, 54627, Thessaloniki, Greece
| | - Panagiotis G Xenoulis
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, 4474 TAMU, College Station, TX 77843, USA
| | - Jan S Suchodolski
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, 4474 TAMU, College Station, TX 77843, USA
| | - Shimon Harrus
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
| | - Joerg M Steiner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, 4474 TAMU, College Station, TX 77843, USA
| | - Victoria I Siarkou
- Laboratory of Microbiology and Infectious Diseases, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, University Campus, 54124, Thessaloniki, Greece
| | - Mathios E Mylonakis
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (SVM-AUTh), 11 Stavrou Voutyra Street, 54627, Thessaloniki, Greece
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Bakosis M, Vlychou M, Poultsidi A, Kappas C, Theodorou K, Fezoulidis I, Vassiou K, Tsougos I. Detailed microarchitecture analysis of breast tumors using diffusion tensor imaging. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.07.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Sulieman A, Elhag B, Alzimami K, Kappas C, Theodorou K. Measurements of pediatric radiation exposure during barium imaging procedures. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.07.247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Van Der Vorst EPC, Jin JP, Mostovyak M, Theodorou K, Hoeksema MA, Wu Y, Goossens P, Van Eck M, Rye KA, De Winther MPJ, Biessen EAL, Donners MMP, Jia JSB, Kuchmenko OB, Mkhytaryan LS, Ievstratova IN, Vasylynchuk NM, Drobotko TF. Biology of High-Density Lipoproteins: An Update49High density lipoproteins exert pro-inflammatory effects on macrophages via passive cholesterol depletion and PKC-NF-kB/STAT1-IRF1 signaling50Homocysteine accelerated the formation of THP-1 macrophages-derived foam cells and cholesterol disorder via regulating the expressions of LXRa, ABCA1 and ABCG151Protein components of HDL as markers of cardiovascular damage in patients with arterial hypertension. Cardiovasc Res 2016. [DOI: 10.1093/cvr/cvw123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Gianopoulos A, Mylonakis ME, Theodorou K, Christopher MM. Quantitative and qualitative leukocyte abnormalities in dogs with experimental and naturally occurring acute canine monocytic ehrlichiosis. Vet Clin Pathol 2016; 45:281-90. [PMID: 27142117 DOI: 10.1111/vcp.12359] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Canine monocytic ehrlichiosis (CME) is one of the most important tick-borne diseases worldwide. Cytopenias have been observed in both acute (nonmyelosuppressive) and chronic (myelosuppressive) CME; however, leukocyte abnormalities and indices have been incompletely described in dogs with acute CME. OBJECTIVES The aims of this study were to analyze temporal changes in differential leukocyte counts, leukocyte morphology, myeloperoxidase index (MPXI), and lobularity index (LI) in dogs with experimental and naturally occurring acute CME. METHODS Differential leukocyte counts and morphology were evaluated in archived blood smears from 13 Beagle dogs experimentally infected with Ehrlichia canis and evaluated weekly for 42 days postinfection (DPI); 20 dogs with naturally occurring acute CME also were evaluated. MPXI and LI were obtained from ADVIA reports. Wilcoxon tests were used to assess changes over time; leukogram results in natural cases were assessed in comparison with reference intervals. RESULTS In experimental dogs, significant decreases in neutrophil, monocyte, lymphocyte, and eosinophil counts, and a mild left shift occurred within 14 DPI. The MPXI decreased significantly between 14 and 21 DPI and remained low, while LI increased from 14 to 35 DPI. Lymphocyte counts rebounded at 21 DPI, normalizing total WBC counts. Neutrophil toxicity was seen rarely, but reactive lymphocytes were observed frequently. Dogs with natural infection had variable patterns of leukocyte changes. CONCLUSIONS Acute CME is associated with several discrete quantitative and qualitative leukogram changes indicative of concurrent inflammation, antigenic stimulation, and stress. Changes in MPXI and LI warrant further investigation in dogs with CME and other diseases.
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Affiliation(s)
- Athena Gianopoulos
- Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California-Davis, Davis, CA, USA
| | - Mathios E Mylonakis
- Department of Clinical Sciences, Clinic of Companion Animals, School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Konstantina Theodorou
- Department of Clinical Sciences, Clinic of Companion Animals, School of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Mary M Christopher
- Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California-Davis, Davis, CA, USA
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Andresen L, Theodorou K, Grünewald S, Czech-Zechmeister B, Könnecke B, Lühder F, Trendelenburg G. Evaluation of the Therapeutic Potential of Anti-TLR4-Antibody MTS510 in Experimental Stroke and Significance of Different Routes of Application. PLoS One 2016; 11:e0148428. [PMID: 26849209 PMCID: PMC4746129 DOI: 10.1371/journal.pone.0148428] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 01/17/2016] [Indexed: 11/30/2022] Open
Abstract
Toll-like receptors (TLRs) are central sensors for the inflammatory response in ischemia-reperfusion injury. We therefore investigated whether TLR4 inhibition could be used to treat stroke in a standard model of focal cerebral ischemia. Anti-TLR4/MD2-antibody (mAb clone MTS510) blocked TLR4-induced cell activation in vitro, as reported previously. Here, different routes of MTS510 application in vivo were used to study the effects on stroke outcome up to 2d after occlusion of the middle cerebral artery (MCAO) for 45min in adult male C57Bl/6 wild-type mice. Improved neurological performance, reduced infarct volumes, and reduced brain swelling showed that intravascular application of MTS510 had a protective effect in the model of 45min MCAO. Evaluation of potential long-term adverse effects of anti-TLR4-mAb-treament revealed no significant deleterious effect on infarct volumes nor neurological deficit after 14d of reperfusion in a mild model of stroke (15min MCAO). Interestingly, inhibition of TLR4 resulted in an altered adaptive immune response at 48 hours after reperfusion. We conclude that blocking TLR4 by the use of specific mAb is a promising strategy for stroke therapy. However, long-term studies with increased functional sensitivity, larger sampling sizes and use of other species are required before a clinical use could be envisaged.
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Affiliation(s)
- Lena Andresen
- Department of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | | | - Sarah Grünewald
- Department of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | | | - Birte Könnecke
- Department of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Fred Lühder
- Department of Neuroimmunology, Institute for Multiple Sclerosis Research, The Hertie Foundation and MPI for Experimental Medicine, Göttingen, Germany
| | - George Trendelenburg
- Department of Neurology, University Medical Center Göttingen, Göttingen, Germany
- * E-mail:
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Gourzoulidis G, Karabetsos E, Skamnakis Ν, Xrtistodoulou A, Kappas C, Theodorou K, Tsougos I, Maris T. Occupational Electromagnetic Fields exposure in Magnetic Resonance Imaging systems – Preliminary results for the RF harmonic content. Phys Med 2015; 31:757-62. [DOI: 10.1016/j.ejmp.2015.03.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Revised: 02/26/2015] [Accepted: 03/12/2015] [Indexed: 10/23/2022] Open
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Koutinas CK, Soubasis NC, Djajadiningrat-Laanen SC, Kolia E, Theodorou K. Urinary Aldosterone/Creatinine Ratio After Fludrocortisone Suppression Consistent with PHA in a Cat. J Am Anim Hosp Assoc 2015; 51:338-41. [PMID: 26355586 DOI: 10.5326/jaaha-ms-6201] [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] [Indexed: 11/11/2022]
Abstract
A 9 yr old cat was presented with clinical signs and laboratory abnormalities attributed to arterial hypertension (mean systolic arterial pressure, 290 mm Hg). Plasma aldosterone concentration was increased at the time of admission (651 pmol/L), but serum creatinine and potassium concentrations were within the reference range. A second increased aldosterone (879 pmol/L) and normal plasma renin activity (1.85 ng/mL/hr) resulted in an increased aldosterone/renin ratio, which was suggestive of primary hyperaldosteronism (PHA). To further support the diagnosis of PHA, the urinary aldosterone/creatinine ratio was calculated both before and after oral administration of fludrocortisone acetate (0.05 mg/kg q 12 hr for 4 consecutive days). The urinary aldosterone/creatinine ratio was 92.6 × 10(-9) before fludrocortisone administration and 155.8 × 10(-9) 4 days later. Absence of suppression was typical of PHA. The cat had a limited response to antihypertensive medication and died before treatment for PHA could be instituted. A necropsy was not permitted by the owner.
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Affiliation(s)
- Christos K Koutinas
- From the Companion Animal Clinic, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece (C.K., N.S., E.K., K.T.); and Division of Ophthalmology, Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht (S.D-L.)
| | - Nektarios C Soubasis
- From the Companion Animal Clinic, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece (C.K., N.S., E.K., K.T.); and Division of Ophthalmology, Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht (S.D-L.)
| | - Sylvia C Djajadiningrat-Laanen
- From the Companion Animal Clinic, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece (C.K., N.S., E.K., K.T.); and Division of Ophthalmology, Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht (S.D-L.)
| | - Elissavet Kolia
- From the Companion Animal Clinic, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece (C.K., N.S., E.K., K.T.); and Division of Ophthalmology, Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht (S.D-L.)
| | - Konstantina Theodorou
- From the Companion Animal Clinic, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece (C.K., N.S., E.K., K.T.); and Division of Ophthalmology, Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht (S.D-L.)
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Sulieman A, Barakat H, Zailae A, Abuderman A, Theodorou K. Measurement of patient radiation doses in certain urography procedures. Radiat Prot Dosimetry 2015; 165:397-401. [PMID: 25899610 DOI: 10.1093/rpd/ncv185] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Patients are exposed to significant radiation doses during diagnostic and interventional urologic procedures. This study aimed to measure patient entrance surface air kerma (ESAK) and to estimate the effective dose during intravenous urography (IVU), extracorporeal shock-wave lithotripsy (ESWL), and ascending urethogram (ASU) procedures. ESAK was measured in patients using calibrated thermo luminance dosimeters, GR200A). Effective doses (E) were calculated using the National Radiological Protection Board (NRPB) software. A total of 179 procedures were investigated. 27.9 % of the patients underwent IVU procedures, 27.9 % underwent ESWL procedures and 44.2 % underwent ASU procedures. The mean ESAK was 2.1, 4.18 and 4.9 mGy for IVU, ESWL, and ASU procedures, respectively. Differences in patient ESAK for the same procedure were observed. The mean ESAK values were comparable with those in previous studies.
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Affiliation(s)
- A Sulieman
- Radiology and Medical Imaging Department, College of Applied Medical Sciences, Prince Sattam bin Abdulaziz University, PO Box 422, Alkharj, Kingdom of Saudi Arabia
| | - H Barakat
- Medical Physics Department, Faculty of Science and Technology, Al-Neelain University, Khartoum, Sudan
| | - A Zailae
- King Saud Medical City (KSMC), Ministry of Health, Kingdom Riyadh, Saudi Arabia
| | - A Abuderman
- Basic Medical Science Department, College of Medicine, Prince Sattam bin Abdulaziz University, PO Box 422, Alkharj, Kingdom of Saudi Arabia
| | - K Theodorou
- Medical Physics Department, University of Thessaly, Biopolis 41110 Larissa, Greece
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Theodorou K, Leontides L, Siarkou VI, Petanides T, Tsafas K, Harrus S, Mylonakis ME. Synovial fluid cytology in experimental acute canine monocytic ehrlichiosis (Ehrlichia canis). Vet Microbiol 2015; 177:224-7. [PMID: 25770893 DOI: 10.1016/j.vetmic.2015.02.032] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 02/23/2015] [Indexed: 10/23/2022]
Abstract
Evidence-based information of a cause-and-effect relationship between Ehrlichia canis infection and polyarthritis in naturally- or experimentally-infected dogs is currently lacking. The aim of this prospective study was to investigate whether synovial fluid cytological evidence of arthritis could be documented in dogs with acute monocytic ehrlichiosis. Direct synovial fluid cytology smears from eight Beagle dogs experimentally infected with E. canis were examined prior to, and on 21, 35 and 63 days post-inoculation. The cytological variables assessed included cellularity, percentages of mononuclear cells and neutrophils, macrophage reactivity and evidence of E. canis morulae. The median cellularity and percentages of mononuclear cells and neutrophils prior to inoculation did not differ when compared to post-inoculation cytological evaluation. Increased cellularity, E. canis morulae or cytological evidence of arthritis or macrophage reactivity were not observed throughout the course of the study. In the present study, no cytological evidence of arthritis was found in dogs with experimental acute canine monocytic ehrlichiosis, suggesting that E. canis infection should be considered a rather uncommon cause of arthritis in dogs.
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Affiliation(s)
- Konstantina Theodorou
- Companion Animal Clinic, School of Veterinary Medicine, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Str., 54627 Thessaloniki, Greece
| | - Leonidas Leontides
- Laboratory of Epidemiology, Biostatistics of Animal Health Economics, School of Veterinary Sciences, University of Thessaly, 224 Trikalon Str., 43100 Karditsa, Greece
| | - Victoria I Siarkou
- Laboratory of Microbiology and Infectious Diseases, School of Veterinary Medicine, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece
| | - Theodoros Petanides
- Clinic of Medicine, School of Veterinary Sciences, University of Thessaly, 224 Trikalon Str., 43100 Karditsa, Greece
| | - Konstantinos Tsafas
- Companion Animal Clinic, School of Veterinary Medicine, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Str., 54627 Thessaloniki, Greece
| | - Shimon Harrus
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
| | - Mathios E Mylonakis
- Companion Animal Clinic, School of Veterinary Medicine, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Str., 54627 Thessaloniki, Greece.
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Theodorou K, Couvet D. The efficiency of close inbreeding to reduce genetic adaptation to captivity. Heredity (Edinb) 2015; 114:38-47. [PMID: 25052417 PMCID: PMC4815592 DOI: 10.1038/hdy.2014.63] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [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: 10/22/2013] [Revised: 04/02/2014] [Accepted: 05/21/2014] [Indexed: 11/09/2022] Open
Abstract
Although ex situ conservation is indispensable for thousands of species, captive breeding is associated with negative genetic changes: loss of genetic variance and genetic adaptation to captivity that is deleterious in the wild. We used quantitative genetic individual-based simulations to model the effect of genetic management on the evolution of a quantitative trait and the associated fitness of wild-born individuals that are brought to captivity. We also examined the feasibility of the breeding strategies under a scenario of a large number of loci subject to deleterious mutations. We compared two breeding strategies: repeated half-sib mating and a method of minimizing mean coancestry (referred to as gc/mc). Our major finding was that half-sib mating is more effective in reducing genetic adaptation to captivity than the gc/mc method. Moreover, half-sib mating retains larger allelic and adaptive genetic variance. Relative to initial standing variation, the additive variance of the quantitative trait increased under half-sib mating during the sojourn in captivity. Although fragmentation into smaller populations improves the efficiency of the gc/mc method, half-sib mating still performs better in the scenarios tested. Half-sib mating shows two caveats that could mitigate its beneficial effects: low heterozygosity and high risk of extinction when populations are of low fecundity and size and one of the following conditions are met: (i) the strength of selection in captivity is comparable with that in the wild, (ii) deleterious mutations are numerous and only slightly deleterious. Experimental validation of half-sib mating is therefore needed for the advancement of captive breeding programs.
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Affiliation(s)
- K Theodorou
- Biodiversity Conservation Laboratory, Department of Environment, University of the Aegean, Mytilene, Greece
| | - D Couvet
- UMR 7204CESCO MNHN-CNRS-UPMC, CP 51, Paris, France
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Mylonakis ME, Soubasis N, Balakrishnan N, Theodorou K, Kasabalis D, Saridomichelakis M, Koutinas CK, Koutinas AF, Breitschwerdt EB. Molecular identification of Bartonella species in dogs with leishmaniosis (leishmania infantum) with or without cytological evidence of arthritis. Vet Microbiol 2014; 174:272-5. [PMID: 25258172 DOI: 10.1016/j.vetmic.2014.08.035] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Revised: 08/25/2014] [Accepted: 08/30/2014] [Indexed: 11/29/2022]
Abstract
Recent evidence suggest that Bartonella species may cause polyarthritis and lameness in dogs. Canine leishmaniosis (CanL) due to Leishmania infantum is a multi-systemic disease often occurring in association with arthritis. We hypothesized that concurrent Bartonella infection may be a contributing factor for the development of arthritis in dogs with CanL. Hence the primary objective of this study was to investigate the molecular prevalence of Bartonella spp. in dogs with naturally occurring CanL, with or without cytologically documented arthritis. Thirty-eight dogs with CanL (31 with neutrophilic arthritis and 7 without arthritis) were retrospectively studied. Seventy-four archived clinical specimens from these 38 dogs, including 33 blood samples, 19 bone marrow (BM) samples and synovial fluid (SF) aspirates from 22 dogs were tested for Bartonella spp. DNA using the Bartonella alpha proteobacteria growth medium (BAPGM) diagnostic platform. Overall, eight (21.1%) dogs were infected with one or two Bartonella species; however, Bartonella spp. infection was not associated with arthritis in dogs with CanL. Further prospective studies are warranted to determine if there is a correlation between Bartonella spp. infection and the development of arthritis in dogs with CanL.
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Affiliation(s)
- Mathios E Mylonakis
- Companion Animal Clinic, School of Veterinary Medicine, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Str., 54627 Thessaloniki, Greece.
| | - Nectarios Soubasis
- Companion Animal Clinic, School of Veterinary Medicine, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Str., 54627 Thessaloniki, Greece
| | - Nandhakumar Balakrishnan
- Intracellular Pathogens Research Laboratory, College of Veterinary Medicine, North Carolina State University (NCSU-CVM), 1060 William Moore Drive, 27607 Raleigh, NC, USA
| | - Konstantina Theodorou
- Companion Animal Clinic, School of Veterinary Medicine, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Str., 54627 Thessaloniki, Greece
| | - Dimitrios Kasabalis
- Clinic of Medicine, School of Veterinary Sciences, University of Thessaly, 224 Trikalon Str., 43100 Karditsa, Greece
| | - Manolis Saridomichelakis
- Clinic of Medicine, School of Veterinary Sciences, University of Thessaly, 224 Trikalon Str., 43100 Karditsa, Greece
| | - Christos K Koutinas
- Companion Animal Clinic, School of Veterinary Medicine, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Str., 54627 Thessaloniki, Greece
| | - Alexander F Koutinas
- Companion Animal Clinic, School of Veterinary Medicine, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Str., 54627 Thessaloniki, Greece
| | - Edward B Breitschwerdt
- Intracellular Pathogens Research Laboratory, College of Veterinary Medicine, North Carolina State University (NCSU-CVM), 1060 William Moore Drive, 27607 Raleigh, NC, USA
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Van Der Vorst EPC, Theodorou K, Plat J, Van Eck M, Rye KA, Bursill CA, Tas SW, De Winther MPJ, Biessen EAL, Donners MMPC. 12High density lipoproteins exert pro-inflammatory effects on macrophages via IKK2- and NIK-independent NF-kB activation. Cardiovasc Res 2014. [DOI: 10.1093/cvr/cvu075.2] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mylonakis ME, Xenoulis PG, Theodorou K, Siarkou VI, Steiner JM, Harrus S, Leontides L, Rallis T, Suchodolski JS, Koutinas CK, Koutinas AF. Serum canine pancreatic lipase immunoreactivity in experimentally induced and naturally occurring canine monocytic ehrlichiosis (Ehrlichia canis). Vet Microbiol 2014; 169:198-202. [PMID: 24530039 DOI: 10.1016/j.vetmic.2014.01.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 08/11/2013] [Revised: 01/07/2014] [Accepted: 01/09/2014] [Indexed: 10/25/2022]
Abstract
Ehrlichia canis infection causes multisystemic disease in dogs (canine monocytic ehrlichiosis, CME) which is associated with variable morbidity and mortality. Atypical clinical manifestations, including gastrointestinal signs, may occasionally occur in CME and approximately 10-15% of dogs are presented with historical or clinical evidence of vomiting, diarrhea, and/or abdominal discomfort. The objective of this study was to investigate if there are any alterations in serum canine pancreatic lipase immunoreactivity (cPLI) in dogs with experimentally induced or naturally occurring monocytic ehrlichiosis. Serum samples from 10 Beagle dogs experimentally infected with E. canis and two healthy uninfected Beagles were serially examined; samples from 20 naturally infected dogs (10 with non-myelosuppressive [NME] and 10 with myelosuppressive [ME] ehrlichiosis) were also examined at a given point in time (cross-sectional sampling). None of the experimentally infected Beagles showed gastrointestinal signs or increased cPLI concentrations prior to or following the artificial infection. Three naturally infected dogs with NME and one with ME demonstrated serum cPLI concentrations in the diagnostic range for pancreatitis (>400 μg/L) without showing gastrointestinal signs. The results of the present study indicated that 4/20 (20%) of dogs naturally infected with E. canis demonstrated increased serum cPLI concentrations consistent with mild and clinically inapparent pancreatitis.
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Affiliation(s)
- Mathios E Mylonakis
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Street, 54627 Thessaloniki, Greece.
| | - Panagiotis G Xenoulis
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, 4474 TAMU, College Station, TX 77843, USA
| | - Konstantina Theodorou
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Street, 54627 Thessaloniki, Greece
| | - Victoria I Siarkou
- Laboratory of Microbiology and Infectious Diseases, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, University Campus, 54124, Greece
| | - Jörg M Steiner
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, 4474 TAMU, College Station, TX 77843, USA
| | - Shimon Harrus
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
| | - Leonidas Leontides
- Laboratory of Epidemiology, Biostatistics and Animal Health Economics, School of Veterinary Medicine, University of Thessaly, 224 Trikalon Street, 43100 Karditsa, Greece
| | - Timoleon Rallis
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Street, 54627 Thessaloniki, Greece
| | - Jan S Suchodolski
- Gastrointestinal Laboratory, Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, 4474 TAMU, College Station, TX 77843, USA
| | - Christos K Koutinas
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Street, 54627 Thessaloniki, Greece
| | - Alexander F Koutinas
- Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki (CAC-AUTh), 11 Stavrou Voutyra Street, 54627 Thessaloniki, Greece
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Tsougos I, Tsitsia V, Valotassiou V, Siasios I, Fountas K, Kapsalaki E, Theodorou K, Fezoulidis I, Georgoulias P. Correlation of advanced magnetic resonance imaging and brain SPECT for the pre-surgical evaluation of cerebral tumour patients. Phys Med 2014. [DOI: 10.1016/j.ejmp.2014.07.292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Kilindris T, Theodorou K. Automatic optimization of multi-isocenter SRT/SRS treatment planning process. Phys Med 2014. [DOI: 10.1016/j.ejmp.2014.07.305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Theodorou K, Mylonakis ME, Siarkou VI, Leontides L, Koutinas AF, Koutinas CK, Kritsepi-Konstantinou M, Batzias G, Flouraki E, Eyal O, Kontos V, Harrus S. Efficacy of rifampicin in the treatment of experimental acute canine monocytic ehrlichiosis. J Antimicrob Chemother 2013; 68:1619-26. [PMID: 23475646 DOI: 10.1093/jac/dkt053] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES To assess the efficacy of rifampicin in achieving clinical and haematological recovery and clearing infection in dogs with experimentally induced acute monocytic ehrlichiosis. METHODS Five Ehrlichia canis-infected Beagle dogs were treated with rifampicin (10 mg/kg/24 h orally for 3 weeks), nine E. canis-infected dogs received no treatment (infected untreated dogs) and two dogs served as uninfected controls. Clinical score, platelet counts, immunofluorescent antibody titres and PCR detection of E. canis-specific DNA in blood, bone marrow and spleen aspirates were evaluated on post-inoculation days 21 (start of rifampicin), 42 (end of rifampicin) and 98 (end of the study). RESULTS By day 21 post-inoculation, all infected dogs became clinically ill and thrombocytopenic, seroconverted and were PCR positive in at least one tissue. Clinical scores and antibody titres did not differ between the treated and infected untreated dogs throughout the study. The rifampicin-treated dogs experienced an earlier resolution of their thrombocytopenia (Kaplan-Meier survival plot, P=0.048), and the median platelet counts were significantly higher in the treated compared with the infected untreated dogs on post-inoculation days 42 (P=0.0233) and 98 (P=0.0195). At the end of the study, three treated and six untreated infected dogs remained PCR positive in one tissue each. CONCLUSIONS The rifampicin treatment regimen applied in this study hastened haematological recovery, but was inconsistent in eliminating the acute E. canis infection.
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Affiliation(s)
- Konstantina Theodorou
- Companion Animal Clinic, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Kousi E, Tsougos I, Tsolaki E, Fountas KN, Theodorou K, Fezoulidis I, Kapsalaki E, Kappas C. Spectroscopic evaluation of glioma grading at 3T: the combined role of short and long TE. ScientificWorldJournal 2012; 2012:546171. [PMID: 22919334 PMCID: PMC3417198 DOI: 10.1100/2012/546171] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [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: 06/06/2012] [Accepted: 06/26/2012] [Indexed: 01/14/2023] Open
Abstract
Purpose. To evaluate the diagnostic value of 3T 1H-MRS in grading cerebral gliomas using short and long echo times. Methods. 1H-MRS was performed on 71 patients with untreated cerebral gliomas. Metabolite ratios of NAA/Cr, Cho/Cr, Cho/NAA, and mI/Cr were calculated for short and long TE and compared between low and high grade gliomas. Lipids were qualitatively evaluated. ROC analysis was performed to obtain the cut-off values for the metabolic ratios presenting statistical difference between the two glioma grades. Results. Intratumoral Cho/Cr at both TEs and long TE Cho/NAA were significantly different between low and high grade gliomas. Peritumoral NAA/Cr of both TEs, as well as long TE Cho/Cr and Cho/NAA ratios, significantly differentiated the two tumor grades. Diagnostic sensitivity of peritumoral short TE NAA/Cr proved to be superior over the other metabolic ratios, whereas intratumoral short TE Cho/Cr reached the highest levels of specificity and accuracy. Overall, short TE 1H-MRS reached higher total sensitivity in predicting glioma grade, over long TE. Conclusion. An advantage was found in using short TE over long TE 1H-MRS in the discrimination of low versus high grade gliomas. Moreover, the results suggested that the peritumoral area of gliomas may be more valuable in predicting glioma grade than using only the intratumoral area.
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Affiliation(s)
- E Kousi
- Medical Physics Department, University of Thessaly, Biopolis, 41110 Larissa, Greece
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Tsiamas P, Sajo E, Cifter F, Theodorou K, Kappas K, Makrigiorgos M, Marcus K, Zygmanski P. SU-E-T-35: Optimal Clinical Megavoltage X-Ray Beam Quality for Contrast Enhanced RT (CERT). Med Phys 2012. [DOI: 10.1118/1.4735090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Kousi E, Tsougos I, Vasiou K, Theodorou K, Poultsidi A, Fezoulidis I, Kappas C. Magnetic resonance spectroscopy of the breast at 3T: pre- and post-contrast evaluation for breast lesion characterization. ScientificWorldJournal 2012; 2012:754380. [PMID: 22645448 PMCID: PMC3356737 DOI: 10.1100/2012/754380] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [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: 11/23/2011] [Accepted: 12/25/2011] [Indexed: 01/13/2023] Open
Abstract
PURPOSE To determine whether in vivo proton magnetic resonance spectroscopy at 3T can provide accurate breast lesion characterization, and to determine the effect of gadolinium on the resonance of tCho. METHODS Twenty-four positive-mammogram patients were examined on a 3T MR scanner. 1H-MRS was performed before and after gadolinium administration. tCho peak was qualitatively evaluated before and after contrast injection. RESULTS Fourteen out of 27 lesions proved to be malignant after histopathological diagnosis. Using 1H-MRS, before contrast injection, 6/14 confirmed malignancies and 11/13 benign lesions were correctly classified; while, after contrast injection, 11/14 confirmed malignancies and 12/13 benign processes were correctly classified. Post gadolinium 1H-MRS proved useful in picking up tCho signal, improving the overall accuracy, sensitivity, and specificity by 35%, 83%, and 9%, respectively. CONCLUSION 1H-MRS overall accuracy, sensitivity, and specificity in detecting breast lesion's malignancy were increased after gadolinium administration. It is prudent to perform 1H-MRS before contrast injection in large breast lesions to avoid choline underestimation. In cases of small or non-mass lesions, it is recommended to perform 1H-MRS after contrast injection for better voxel prescription to enable a reliable preoperative diagnosis.
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Affiliation(s)
- E Kousi
- Medical Physics Department, University of Thessaly, Biopolis, 41110 Larissa, Greece
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Sulieman A, Vlychou M, Tsougos I, Kappas C, Theodorou K. Radiation doses to patients undergoing enteroclysis. Radiat Prot Dosimetry 2011; 147:122-125. [PMID: 21743077 DOI: 10.1093/rpd/ncr278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Enteroclysis is a minimally invasive radiographic examination of the small intestine. During the procedure, considerable radiation dose is delivered to the patients. This study intends to: (a) evaluate the radiation dose to the patient using thermoluminescent dosemeters (TLDs, according to the protocol used at Radiology Department, University Hospital of Larissa, Greece; (b) estimate the thyroid surface dose (TSD) and doses to some radiosensitive organs located in the irradiation field. A total of 46 patients was examined. Patients were divided into two groups according to the digital X-ray machine used. The mean entrance surface dose (ESD) was 601.2 ± 96.2 mGy and the mean fluoroscopy time was 8.5 ± 3 min, while the mean TSD was 0.34 ± 0.6 mGy. The ESD for group A was lower by 20 % than group B due to fluoroscopic mode used. The dose values were higher than those in the literature. A local diagnostic reference level was introduced for further patient dose optimisation.
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Affiliation(s)
- A Sulieman
- College of Medical Radiologic Science, Sudan University of Science and Technology, PO Box 1908 Khartoum, Sudan.
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Abstract
Barium studies investigations (barium swallow, barium meal and barium enema) are the basic routine radiological examination, where barium sulphate suspension is introduced to enhance image contrast of gastrointestinal tracts. The aim of this study was to quantify the patients' radiation doses during barium studies and to estimate the organ equivalent dose and effective dose with those procedures. A total of 33 investigations of barium studies were measured by using thermoluminescence dosemeters. The result showed that the patient entrance surface doses were 12.6 ± 10, 44.5 ± 49 and 35.7 ± 50 mGy for barium swallow, barium meal, follow through and enema, respectively. Effective doses were 0.2, 0.35 and 1.4 mSv per procedure for barium swallow, meal and enema respectively. Radiation doses were comparable with the previous studies. A written protocol for each procedure will reduce the inter-operator variations and will help to reduce unnecessary exposure.
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Affiliation(s)
- A Sulieman
- College of Medical Radiologic Science, Sudan University of Science and Technology, PO Box 1908, Khartoum, Sudan.
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Sulieman A, Vlychou M, Tsougos I, Theodorou K. Radiation doses to paediatric patients and comforters undergoing chest X rays. Radiat Prot Dosimetry 2011; 147:171-175. [PMID: 21743069 DOI: 10.1093/rpd/ncr295] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Pneumonia is an important cause of hospital admission among children in the developed world and it is estimated to be responsible for 3-18 % of all paediatric admissions. Chest X ray is an important examination for pneumonia diagnosis and for evaluation of complications. This study aims to determine the entrance surface dose (ESD), organ, effective doses and propose a local diagnostic reference level. The study was carried out at the university hospital of Larissa, Greece. Patients were divided into three groups: organ and effective doses were estimated using National Radiological Protection Board software. The ESD was determined by thermoluminescent dosemeters for 132 children and 76 comforters. The average ESD value was 55 ± 8 µGy. The effective dose for patients was 11.2 ± 5 µSv. The mean radiation dose for comforter is 22 ± 3 µGy. The radiation dose to the patients is well within dose constraint, in the light of the current practice.
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Affiliation(s)
- A Sulieman
- College of Medical Radiologic Science, Sudan University of Science and Technology, PO Box 1908, Khartoum, Sudan.
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Tsiamas P, Seco J, Han Z, Bhagwat M, Maddox J, Kappas C, Theodorou K, Makrigiorgos M, Marcus K, Zygmanski P. A modification of flattening filter free linac for IMRT. Med Phys 2011; 38:2342-52. [PMID: 21776768 DOI: 10.1118/1.3571419] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE This study investigates the benefits of a modified flattening filter free (FFF) linac over the standard (STD) linac equipped with the flattening filter. Energy and angular spread of the electron beam of the FFF linac were modified. Modification of FFF beam parameters is explored to maximize the monitor unit efficiency and to minimize the head scatter in IMRT delivery for large target volumes or targets lying away from the central axis. METHODS The EGSnrc code is used to model FFF and STD linacs and study basic beam properties for both linac types in various beam configurations. Increasing energy of FFF linac results in similar beam attenuation properties and maximized dose rate compared to STD linac. Matching beam attenuation properties allows a more direct exploration of beam flatness of FFF linac in regard to IMRT delivery, especially away from the central axis where the effective dose rate is considerably smaller than the one at the central axis. Flatness of open beam dose profile of FFF linac is improved by increasing the angular spread of the electron beam. The resulting dose rate within the treatment field and outside of the field (peripheral dose) are characterized and compared to the unmodified FFF and STD linacs, RESULTS In order to match beam penetration properties, the energy of FFF is adjusted from 6.5 to 8.0 MeV for small to medium field sizes and from 6.5 to 8.5 MeV for larger ones. Dose rate of FFF vs STD linac increased by a factor of 1.9 (6.5 MeV) and 3.4-4.1 (8.0-8.5 MeV). Adjusting the mean angular spread of the electron beam from 0 degrees to 5 degrees-10 degrees resulted in complete flattening of photon beam for field sizes between 10 x 10 cm2 and 15 x 15 cm2 and partial flattening for field sizes from 15 x 15 cm2 to 30 x 30 cm2. Values of angular spread > or =14 degrees are not recommended as they exceed the opening of the primary collimator, affecting the area at the edges of the field. FFF fields of sizes smaller than 6 x 6 cm2 are already flat and beam flattening is not necessary. Overall, the angular spread of 5 degrees-10 degrees is sufficient and can satisfactorily flatten open beam dose profiles even for larger field sizes. Increasing the electron beam angular spread amounts to a slight decrease of dose rate of FFF linac. However, for angular spread, 5 degrees-10 degrees dose rate factor of FFF vs STD is still about 1.6-2.6, depending on the field size (and the adjusted energy). Similarly, in case of peripheral dose, a moderate increase in dose can be observed for angular spread of 5 degrees-10 degrees and for field sizes 10 x 10 cm2 to 30 x 30 cm2. Lastly, beam flatness of not modified FFF linac can be conveniently described by an analytical function representing a ratio of STD vs FFF doses: 1 + b|r|(n). CONCLUSIONS A modified FFF beamline with increased energy and electron beam angular spread results in satisfactory flattened beam and high dose rate within the field. Peripheral dose remaining at similar (or smaller) level than that of STD linac for the same delivered dose within the treatment field.
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Affiliation(s)
- P Tsiamas
- Brigham and Women Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA
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Mylonakis ME, Soubasis N, Kritsepi-Konstantinou M, Vernau W, Theodorou K, Tentoma L, Koutinas AF. Presumptive histiocytic neoplasm with unusual immunophenotype in a cat. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/s00580-011-1304-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kounelakis MG, Dimou IN, Zervakis ME, Tsougos I, Tsolaki E, Kousi E, Kapsalaki E, Theodorou K. Strengths and weaknesses of 1.5T and 3T MRS data in brain glioma classification. ACTA ACUST UNITED AC 2011; 15:647-54. [PMID: 21427025 DOI: 10.1109/titb.2011.2131146] [Citation(s) in RCA: 9] [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] [Indexed: 11/09/2022]
Abstract
Although magnetic resonance spectroscopy (MRS) methods of 1.5Tesla (T) and 3T have been widely applied during the last decade for noninvasive diagnostic purposes, only a few studies have been reported on the value of the information extracted in brain cancer discrimination. The purpose of this study is threefold. First, to show that the diagnostic value of the information extracted from two different MRS scanners of 1.5T and 3T is significantly influenced in terms of brain gliomas discrimination. Second, to statistically evaluate the discriminative potential of publicly known metabolic ratio markers, obtained from these two types of scanners in classifying low-, intermediate-, and high-grade gliomas. Finally, to examine the diagnostic value of new metabolic ratios in the discrimination of complex glioma cases where the diagnosis is both challenging and critical. Our analysis has shown that although the information extracted from 3T MRS scanner is expected to provide better brain gliomas discrimination; some factors like the features selected, the pulse-sequence parameters, and the spectroscopic data acquisition methods can influence the discrimination efficiency. Finally, it is shown that apart from the bibliographical known, new metabolic ratio features such as N-acetyl aspartate/ S, Choline/ S, Creatine/ S , and myo-Inositol/ S play significant role in gliomas grade discrimination.
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Affiliation(s)
- M G Kounelakis
- Department of Electronic and Computer Engineering, Technical University of Crete, Chania 73100, Greece.
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Mylonakis ME, Borjesson DL, Leontides L, Siarkou VI, Theodorou K, Koutinas AF. Cytologic patterns of lymphadenopathy in canine monocytic ehrlichiosis. Vet Clin Pathol 2011; 40:78-83. [PMID: 21291487 DOI: 10.1111/j.1939-165x.2011.00293.x] [Citation(s) in RCA: 7] [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] [Indexed: 11/30/2022]
Abstract
BACKGROUND Recognition of different cytologic patterns in lymph nodes (LNs) from dogs with canine monocytic ehrlichiosis (CME) and noninfectious causes of lymphoid reactivity may have diagnostic utility. OBJECTIVES The aims of the present study were to compare cytologic patterns in LNs of dogs with different phases of CME, to investigate the association of cytologic pattern and presence of Ehrlichia spp. morulae, and to compare patterns of lymphoid reactivity between dogs with CME and those with noninfectious causes of lymphoid hyperplasia. METHODS Cytologic preparations of LNs from 35 dogs with nonmyelosuppressive CME (group A), 16 dogs with myelosuppressive CME (group B), 26 dogs with noninfectious diseases (group C), and 15 healthy dogs (group D) were evaluated. Percentages of lymphocyte types, plasma cells, macrophages, neutrophils, and eosinophils were determined. Samples from dogs in groups A and B were evaluated for the presence of morulae. RESULTS Cytologic abnormalities in LNs were recorded in 54% of dogs in group A, 88% in group B, 39% in group C, and 0% in group D and were more frequent (P=.02) in dogs with myelosuppressive CME than those with nonmyelosuppressive CME. Plasma cell hyperplasia was more frequent in CME than in noninfectious diseases (P=.03). An association between the presence of cytologic abnormalities and morulae in group A dogs was not found. CONCLUSIONS Dogs with myelosuppressive CME have more lymphoid cytologic abnormalities than dogs with nonmyelosuppressive CME. LN plasmacytosis is the major pattern of lymphadenopathy in dogs with CME and is found more frequently in dogs with CME than in dogs with noninfectious causes of lymphadenopathy.
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Affiliation(s)
- Mathios E Mylonakis
- Companion Animal Clinic, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece.
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