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Dimopoulou D, Sotiri D, Kousi D, Loulou G, Raptaki K, Neofytou A, Dasoula F, Tampouratzi M, Koloi A, Eleftheriou E, Vergadi E, Papadimitriou E, Zorbadaki I, Mavridi A, Miliordos K, Steletou E, Strempela M, Fragkou PC, Spoulou V, Michos A, Gkentzi D, Papaevangelou V, Ladomenou F, Grivea I, Syrogiannopoulos G, Galanakis E, Zaoutis T, Tryfinopoulou K, Tsolia MN. SARS-CoV-2 seroprevalence among children in Greece during Omicron variant period. Eur J Pediatr 2024; 183:2491-2499. [PMID: 38478132 DOI: 10.1007/s00431-024-05486-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 01/05/2024] [Accepted: 02/13/2024] [Indexed: 04/23/2024]
Abstract
The Omicron variant is associated with increased transmissibility, but evidence about the impact of Omicron in seropositivity of children is limited. This study aims to evaluate SARS-CoV-2 seroprevalence in children during the different variants' subperiods. A prospective multicenter seroprevalence study was conducted in 7 University public hospitals in Greece from November 2021 to August 2022 (3 subperiods: November 2021-February 2022, March 2022-May 2022, June 2022-August 2022). Children from different age groups, admitted to the hospital or examined in outpatient clinics for reasons other than COVID-19 were enrolled. Neutralizing antibodies (Nabs), anti-Spike (anti-S) and anti-nucleocapsid (anti-N) SARS-CoV-2 IgG in serum were evaluated. A total of 2127 children (males:57,2%; median age:4,8years) were enrolled. Anti-N IgG seropositivity increased from 17,8% in the first sub-period to 40,7% in the second sub-period and then decreased in the third sub-period (36,7%). Anti-S IgG seropositivity appeared to have an increasing trend over the study period, starting from 34,8% and reaching 80,7%. Children aged 1-4 years old have significantly higher anti-N IgG titers compared to children aged 0-1 years old (p < 0,001). Infants have significantly lower anti-S IgG titers compared to all other age groups (p < 0,001). Immunocompromised children and infants have the lowest seropositivity for NAbs.Conclusions During the Omicron period, seropositivity significantly increased, as a result of higher transmissibility. Neonates and infants have lower antibody titers compared to other age groups, while young children aged 1-4 years old present higher antibody titers, suggesting that this age group may mount a higher antibody response. Continuous surveillance seroprevalence studies are needed in children, in order to identify the true extent of SARS-CoV-2 and guide the planning of adequate public health measures.
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Affiliation(s)
- Dimitra Dimopoulou
- Second Department of Paediatrics, School of Medicine, National and Kapodistrian University of Athens, 'P. and A. Kyriakou' Children's Hospital, Thivon and Leivadias, Athens, 30601, Greece
| | - Despoina Sotiri
- Central Public Health Laboratory, Hellenic Centre for Diseases Control and Prevention, Athens, Greece
| | - Dimitra Kousi
- Center for Clinical Epidemiology and Outcomes Research (CLEO), Athens, 15451, Greece
| | - Garyfallia Loulou
- Central Public Health Laboratory, Hellenic Centre for Diseases Control and Prevention, Athens, Greece
| | - Kalliopi Raptaki
- Central Public Health Laboratory, Hellenic Centre for Diseases Control and Prevention, Athens, Greece
| | - Ariadni Neofytou
- Second Department of Paediatrics, School of Medicine, National and Kapodistrian University of Athens, 'P. and A. Kyriakou' Children's Hospital, Thivon and Leivadias, Athens, 30601, Greece
| | - Foteini Dasoula
- Second Department of Paediatrics, School of Medicine, National and Kapodistrian University of Athens, 'P. and A. Kyriakou' Children's Hospital, Thivon and Leivadias, Athens, 30601, Greece
| | - Maria Tampouratzi
- Second Department of Paediatrics, School of Medicine, National and Kapodistrian University of Athens, 'P. and A. Kyriakou' Children's Hospital, Thivon and Leivadias, Athens, 30601, Greece
| | - Athina Koloi
- Second Department of Paediatrics, School of Medicine, National and Kapodistrian University of Athens, 'P. and A. Kyriakou' Children's Hospital, Thivon and Leivadias, Athens, 30601, Greece
| | - Eirini Eleftheriou
- Second Department of Paediatrics, School of Medicine, National and Kapodistrian University of Athens, 'P. and A. Kyriakou' Children's Hospital, Thivon and Leivadias, Athens, 30601, Greece
| | - Eleni Vergadi
- School of Medicine, Department of Paediatrics, University General Hospital of Heraklion, University of Crete, Heraklion, Greece
| | - Eleni Papadimitriou
- School of Health Sciences, Faculty of Medicine, Department of Paediatrics, University General Hospital of Larissa, University of Thessaly, Larissa, Greece
| | - Irini Zorbadaki
- Department of Pediatrics, Venizeleion General Hospital, Heraklion, Greece
| | - Artemis Mavridi
- Attikon University Hospital, National and Kapodistrian University of Athens, Third Department of Paediatrics, Athens, Greece
| | | | - Evangelia Steletou
- Medical School, Department of Paediatrics, University of Patras, Patras, Greece
| | - Maria Strempela
- First Department of Paediatrics, Aghia Sophia' Children's Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Paraskevi C Fragkou
- First Department of Critical Care Medicine and Pulmonary Services, Evangelismos Hospital, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Vassiliki Spoulou
- First Department of Paediatrics, Aghia Sophia' Children's Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Athanasios Michos
- First Department of Paediatrics, Aghia Sophia' Children's Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Despoina Gkentzi
- Medical School, Department of Paediatrics, University of Patras, Patras, Greece
| | - Vassiliki Papaevangelou
- Attikon University Hospital, National and Kapodistrian University of Athens, Third Department of Paediatrics, Athens, Greece
| | - Fani Ladomenou
- Department of Pediatrics, Venizeleion General Hospital, Heraklion, Greece
| | - Ioanna Grivea
- School of Health Sciences, Faculty of Medicine, Department of Paediatrics, University General Hospital of Larissa, University of Thessaly, Larissa, Greece
| | - George Syrogiannopoulos
- School of Health Sciences, Faculty of Medicine, Department of Paediatrics, University General Hospital of Larissa, University of Thessaly, Larissa, Greece
| | - Emmanouil Galanakis
- School of Medicine, Department of Paediatrics, University General Hospital of Heraklion, University of Crete, Heraklion, Greece
| | - Theoklis Zaoutis
- Second Department of Paediatrics, School of Medicine, National and Kapodistrian University of Athens, 'P. and A. Kyriakou' Children's Hospital, Thivon and Leivadias, Athens, 30601, Greece
| | - Kyriaki Tryfinopoulou
- Central Public Health Laboratory, Hellenic Centre for Diseases Control and Prevention, Athens, Greece
| | - Maria N Tsolia
- Second Department of Paediatrics, School of Medicine, National and Kapodistrian University of Athens, 'P. and A. Kyriakou' Children's Hospital, Thivon and Leivadias, Athens, 30601, Greece.
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Dimopoulou D, Kyritsi M, Dadouli K, Vergadi E, Tsiligianni E, Papadimitriou E, Mavridi A, Giannakopoulos S, Tsiourvopoulou G, Palyvou M, Angeli E, Brikos N, Eleftheriou I, Spoulou V, Michos A, Gkentzi D, Siomou E, Papaevangelou V, Grivea I, Syrogiannopoulos G, Galanakis E, Hadjichristodoulou C, Tsolia M. Seroprevalence of anti-SARS-CoV-2 antibodies among children and their parents in Greece. Eur J Pediatr 2023; 182:439-449. [PMID: 36383284 PMCID: PMC9666986 DOI: 10.1007/s00431-022-04681-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 10/21/2022] [Accepted: 10/26/2022] [Indexed: 11/17/2022]
Abstract
UNLABELLED School closures were enforced as measures to restrain the COVID-19 pandemic, based on the assumption that young children may play a key role in SARS-CoV-2 spread. This study aims to determine the prevalence of SARS-CoV-2 IgG antibodies in children and corresponding parents, in order to improve surveillance and estimate the prevalence of asymptomatic or subclinical COVID-19 cases. A prospective multicenter study was conducted between March and June 2021 in Greece. Children admitted to the hospital or examined in outpatient clinics for reasons other than COVID-19 and their parents were tested for anti-Spike SARS-CoV-2 IgG in serum. A questionnaire about clinical and demographic data was completed. The study included 823 participants: 427 children and 396 corresponding parents. The overall seroprevalence was 16.4% in parents and 13.8% in children. Among families with ≥ 1 seropositive child or parent, the combination of a seropositive parent and a corresponding seronegative child was 29.6%, a seronegative parent and a corresponding seropositive child was 24.7%, and a seropositive child with a corresponding seropositive parent was 45.7%. Age, level of education, and school or work attendance were not significantly associated with increased seropositivity. On the contrary, ethnic minority of Roma, close contact with known COVID-19 case, previous symptoms consistent with COVID-19, and mass gatherings were risk factors for seropositivity. CONCLUSION The spread of SARS-CoV-2 during a period of lockdown in Greece was low in children and comparable to adults most likely due to intrafamilial transmission. Accordingly, it is unlikely that children have boosted virus transmission. WHAT IS KNOWN • In the earliest months of the pandemic, it was demonstrated that children had significantly lower seroprevalence rates than the older age groups, due to the fact that children had decreased exposure to the virus, because of early public health interventions, such as school and day care closure. • Later, further studies reported that children have similar incidence rate of SARS-CoV-2 infection compared to adults in households and community settings. WHAT IS NEW • In this seroprevalence study, the spread of SARS-CoV-2 infection during a period of lockdown in Greece with the predominance of the Alpha-variant was particularly low in children and comparable to adults, most likely due to intrafamilial transmission. • These study findings will be useful for decisions regarding non-pharmaceutical interventions during the pandemic, and especially, to guide in designing and implementing appropriate containment measures for schools and social gatherings.
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Affiliation(s)
- Dimitra Dimopoulou
- Second Department of Pediatrics, "P. & A. Kyriakou" Children's Hospital, National and Kapodistrian University of Athens, Second Department of Paediatrics, Thivon and Leivadias Str, 11526, Athens, Greece.
| | - Maria Kyritsi
- Laboratory of Hygiene and Epidemiology, Faculty of Medicine, University of Thessaly, Larissa, Greece
| | - Katerina Dadouli
- Laboratory of Hygiene and Epidemiology, Faculty of Medicine, University of Thessaly, Larissa, Greece
| | - Eleni Vergadi
- School of Medicine, Department of Paediatrics, University of Crete, University General Hospital of Heraklion, Heraklion, Greece
| | | | - Eleni Papadimitriou
- School of Health Sciences, Faculty of Medicine, Department of Paediatrics, University General Hospital of Larissa, University of Thessaly, Larissa, Greece
| | - Artemis Mavridi
- Third Department of Paediatrics, Attikon University Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | | | | | - Maria Palyvou
- Medical School, Department of Paediatrics, University of Patras, Patras, Greece
| | - Evangelia Angeli
- Medical School, Department of Paediatrics, University of Patras, Patras, Greece
| | - Nikitas Brikos
- First Department of Paediatrics, “Aghia Sophia” Children’s Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Irini Eleftheriou
- Second Department of Pediatrics, “P. & A. Kyriakou” Children’s Hospital, National and Kapodistrian University of Athens, Second Department of Paediatrics, Thivon and Leivadias Str, 11526 Athens, Greece
| | - Vassiliki Spoulou
- First Department of Paediatrics, “Aghia Sophia” Children’s Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Athanasios Michos
- First Department of Paediatrics, “Aghia Sophia” Children’s Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Despoina Gkentzi
- Medical School, Department of Paediatrics, University of Patras, Patras, Greece
| | - Ekaterini Siomou
- Department of Pediatrics, University Hospital of Ioannina, Ioannina, Greece
| | - Vassiliki Papaevangelou
- Third Department of Paediatrics, Attikon University Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Ioanna Grivea
- School of Health Sciences, Faculty of Medicine, Department of Paediatrics, University General Hospital of Larissa, University of Thessaly, Larissa, Greece
| | - George Syrogiannopoulos
- School of Health Sciences, Faculty of Medicine, Department of Paediatrics, University General Hospital of Larissa, University of Thessaly, Larissa, Greece
| | - Emmanouil Galanakis
- School of Medicine, Department of Paediatrics, University of Crete, University General Hospital of Heraklion, Heraklion, Greece
| | | | - Maria Tsolia
- Second Department of Pediatrics, “P. & A. Kyriakou” Children’s Hospital, National and Kapodistrian University of Athens, Second Department of Paediatrics, Thivon and Leivadias Str, 11526 Athens, Greece
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Gavriilaki E, Tsiftsoglou SA, Touloumenidou T, Farmaki E, Panagopoulou P, Michailidou E, Koravou EE, Mavrikou I, Iosifidis E, Tsiatsiou O, Papadimitriou E, Papadopoulou-Alataki E, Papayanni PG, Varelas C, Kokkoris S, Papalexandri A, Fotoulaki M, Galli-Tsinopoulou A, Zafeiriou D, Roilides E, Sakellari I, Anagnostopoulos A, Tragiannidis A. Targeted Genotyping of MIS-C Patients Reveals a Potential Alternative Pathway Mediated Complement Dysregulation during COVID-19 Infection. Curr Issues Mol Biol 2022; 44:2811-2824. [PMID: 35877417 PMCID: PMC9325260 DOI: 10.3390/cimb44070193] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/21/2022] [Accepted: 06/24/2022] [Indexed: 11/24/2022] Open
Abstract
Complement dysregulation has been documented in adults with COVID-19 and implicated in relevant pediatric inflammatory responses against SARS-CoV-2. We propose that signatures of complement missense coding SNPs associated with dysregulation could also be identified in children with multisystem inflammatory syndrome (MIS-C). We investigated 71 pediatric patients with RT-PCR validated SARS-CoV-2 hospitalized in pediatric COVID-19 care units (November 2020–March 2021) in three major groups. Seven (7) patients suffered from MIS-C (MIS-C group), 32 suffered from COVID-19 and were hospitalized (admitted group), whereas 32 suffered from COVID-19, but were sent home. All patients survived and were genotyped for variations in the C3, C5, CFB, CFD, CFH, CFHR1, CFI, CD46, CD55, MASP1, MASP2, MBL2, COLEC11, FCN1, and FCN3 genes. Upon evaluation of the missense coding SNP distribution patterns along the three study groups, we noticed similarities, but also considerably increased frequencies of the alternative pathway (AP) associated with SNPs rs12614 CFB, rs1061170, and rs1065489 CFH in the MIS-C patients. Our analysis suggests that the corresponding substitutions potentially reduce the C3b-inactivation efficiency and promote slower and weaker AP C3bBb pre-convertase assembly on virions. Under these circumstances, the complement AP opsonization capacity may be impaired, leading to compromised immune clearance and systemic inflammation in the MIS-C syndrome.
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Affiliation(s)
- Eleni Gavriilaki
- Hematology Department & BMT Unit, G Papanicolaou Hospital, 57010 Thessaloniki, Greece; (T.T.); (E.-E.K.); (I.M.); (P.G.P.); (C.V.); (A.P.); (I.S.); (A.A.)
- Correspondence: (E.G.); (S.A.T.); Tel.: +30-697-3841-671 (E.G.); +30-697-9568-269 (S.A.T.)
| | - Stefanos A. Tsiftsoglou
- Laboratory of Pharmacology, Department of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
- Correspondence: (E.G.); (S.A.T.); Tel.: +30-697-3841-671 (E.G.); +30-697-9568-269 (S.A.T.)
| | - Tasoula Touloumenidou
- Hematology Department & BMT Unit, G Papanicolaou Hospital, 57010 Thessaloniki, Greece; (T.T.); (E.-E.K.); (I.M.); (P.G.P.); (C.V.); (A.P.); (I.S.); (A.A.)
| | - Evangelia Farmaki
- 1st Pediatric Department, Aristotle University of Thessaloniki, Hipporkation Hospital, 54642 Thessaloniki, Greece; (E.F.); (E.P.); (D.Z.)
| | - Paraskevi Panagopoulou
- 4th Pediatric Department, Aristotle University of Thessaloniki, Papageorgiou Hospital, 56429 Thessaloniki, Greece; (P.P.); (E.P.-A.); (M.F.)
| | - Elissavet Michailidou
- 3rd Pediatric Department, Aristotle University of Thessaloniki, Hippokration Hospital, 54642 Thessaloniki, Greece; (E.M.); (E.I.); (O.T.); (E.R.)
| | - Evaggelia-Evdoxia Koravou
- Hematology Department & BMT Unit, G Papanicolaou Hospital, 57010 Thessaloniki, Greece; (T.T.); (E.-E.K.); (I.M.); (P.G.P.); (C.V.); (A.P.); (I.S.); (A.A.)
| | - Ioulia Mavrikou
- Hematology Department & BMT Unit, G Papanicolaou Hospital, 57010 Thessaloniki, Greece; (T.T.); (E.-E.K.); (I.M.); (P.G.P.); (C.V.); (A.P.); (I.S.); (A.A.)
| | - Elias Iosifidis
- 3rd Pediatric Department, Aristotle University of Thessaloniki, Hippokration Hospital, 54642 Thessaloniki, Greece; (E.M.); (E.I.); (O.T.); (E.R.)
| | - Olga Tsiatsiou
- 3rd Pediatric Department, Aristotle University of Thessaloniki, Hippokration Hospital, 54642 Thessaloniki, Greece; (E.M.); (E.I.); (O.T.); (E.R.)
| | - Eleni Papadimitriou
- 1st Pediatric Department, Aristotle University of Thessaloniki, Hipporkation Hospital, 54642 Thessaloniki, Greece; (E.F.); (E.P.); (D.Z.)
| | - Efimia Papadopoulou-Alataki
- 4th Pediatric Department, Aristotle University of Thessaloniki, Papageorgiou Hospital, 56429 Thessaloniki, Greece; (P.P.); (E.P.-A.); (M.F.)
| | - Penelope Georgia Papayanni
- Hematology Department & BMT Unit, G Papanicolaou Hospital, 57010 Thessaloniki, Greece; (T.T.); (E.-E.K.); (I.M.); (P.G.P.); (C.V.); (A.P.); (I.S.); (A.A.)
| | - Christos Varelas
- Hematology Department & BMT Unit, G Papanicolaou Hospital, 57010 Thessaloniki, Greece; (T.T.); (E.-E.K.); (I.M.); (P.G.P.); (C.V.); (A.P.); (I.S.); (A.A.)
| | - Styliani Kokkoris
- Laboratory of Hematology and Hospital—Blood Transfusion Unit, Medical School, University General Hospital “Attikon”, NKUA, 12462 Athens, Greece;
| | - Apostolia Papalexandri
- Hematology Department & BMT Unit, G Papanicolaou Hospital, 57010 Thessaloniki, Greece; (T.T.); (E.-E.K.); (I.M.); (P.G.P.); (C.V.); (A.P.); (I.S.); (A.A.)
| | - Maria Fotoulaki
- 4th Pediatric Department, Aristotle University of Thessaloniki, Papageorgiou Hospital, 56429 Thessaloniki, Greece; (P.P.); (E.P.-A.); (M.F.)
| | - Assimina Galli-Tsinopoulou
- 2nd Pediatric Department, Aristotle University of Thessaloniki, AHEPA Hospital, 54621 Thessaloniki, Greece; (A.G.-T.); (A.T.)
| | - Dimitrios Zafeiriou
- 1st Pediatric Department, Aristotle University of Thessaloniki, Hipporkation Hospital, 54642 Thessaloniki, Greece; (E.F.); (E.P.); (D.Z.)
| | - Emmanuel Roilides
- 3rd Pediatric Department, Aristotle University of Thessaloniki, Hippokration Hospital, 54642 Thessaloniki, Greece; (E.M.); (E.I.); (O.T.); (E.R.)
| | - Ioanna Sakellari
- Hematology Department & BMT Unit, G Papanicolaou Hospital, 57010 Thessaloniki, Greece; (T.T.); (E.-E.K.); (I.M.); (P.G.P.); (C.V.); (A.P.); (I.S.); (A.A.)
| | - Achilles Anagnostopoulos
- Hematology Department & BMT Unit, G Papanicolaou Hospital, 57010 Thessaloniki, Greece; (T.T.); (E.-E.K.); (I.M.); (P.G.P.); (C.V.); (A.P.); (I.S.); (A.A.)
| | - Athanasios Tragiannidis
- 2nd Pediatric Department, Aristotle University of Thessaloniki, AHEPA Hospital, 54621 Thessaloniki, Greece; (A.G.-T.); (A.T.)
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Karyoti A, Myserli E, Zarras C, Mpani K, Papadimitriou E, Rousis D, Chatzidimitriou D, Vagdatli E. M086 Screening of HIV infection: Five years experience of a tertiary care Greek hospital. Clin Chim Acta 2022. [DOI: 10.1016/j.cca.2022.04.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Papadimitriou E, Stamatakos P, Leventi A, Moschotzopoulos D, Kaoullas A, Mari V, Fragkoulis C, Stathouros G, Ntoumas K. A comparison between three different techniques for prostate biopsies. Which is the worthiest one? EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)00133-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Pappa S, Haidopoulou K, Zarras C, Theodorakou E, Papadimitriou E, Iosifidis E, Gkeka I, Stoikou K, Vagdatli E, Skoura L, Papa A. Early initiation of the respiratory syncytial virus season in 2021-2022, Greece. J Med Virol 2022; 94:3453-3456. [PMID: 35199347 DOI: 10.1002/jmv.27671] [Citation(s) in RCA: 2] [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] [Received: 01/05/2022] [Revised: 02/04/2022] [Accepted: 02/20/2022] [Indexed: 11/11/2022]
Abstract
Respiratory syncytial virus (RSV) is the most common viral pathogen causing respiratory disease in the pediatric population. An unexpected sudden upsurge of RSV infections among children was observed in September 2021 in Greece. Forty-one rhinopharyngeal samples from children under the age of 2 years with confirmed RSV bronchiolitis were tested to identify the genotype(s) of the RSV strain(s). The children were hospitalized during September-November 2021 in three tertiary hospitals in northern Greece. A one-step RT-PCR which amplifies a fragment of the second hypervariable region of the G protein gene was applied. PCR products were sequenced, and phylogenetic analysis was performed. Most (80.5%) RSV cases were typed as RSV-A, with RSV-B accounting for 19.5% of cases. RSV-A and RSV-B sequences clustered within the ON1 and BA genotypes, respectively. Since the same genotypes were detected in cases observed during 2016-2018 in northern Greece, it was suggested that the early upsurge of infections was not related to the emergence of novel strain(s), but it was the result of the absence of immunity among children and their mothers due to the restriction measures taken during the COVID-19 pandemic in the previous RSV season. Awareness is needed to diagnose even the out-of-season RSV infections, while molecular epidemiology plays a key role in monitoring the efficacy of currently available therapeutics and for those under development. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Styliani Pappa
- Laboratory of Microbiology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Katerina Haidopoulou
- 2nd Department of Pediatrics, AHEPA Hospital, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Charalampos Zarras
- Microbiology Department, Hippokration General Hospital, Thessaloniki, Greece
| | | | - Eleni Papadimitriou
- 1st Department of Pediatrics, Hippokration General Hospital, Thessaloniki, Greece
| | - Elias Iosifidis
- Infectious Disease Unit, 3rd Department of Pediatrics, School of Medicine, Hippokration General Hospital, Thessaloniki, Greece
| | - Ioanna Gkeka
- Microbiology Laboratory, AHEPA Hospital, School of Medicine, Aristotle University of Thessaloniki, Greece
| | - Konstantina Stoikou
- Laboratory of Microbiology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Eleni Vagdatli
- Microbiology Department, Hippokration General Hospital, Thessaloniki, Greece
| | - Lemonia Skoura
- Microbiology Laboratory, AHEPA Hospital, School of Medicine, Aristotle University of Thessaloniki, Greece
| | - Anna Papa
- Laboratory of Microbiology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Kakkas I, Tsinti G, Kalala F, Farmaki E, Kourakli A, Kapousouzi A, Dimou M, Kalaitzidou V, Sevdali E, Peristeri AM, Tsiouma G, Patiou P, Papadimitriou E, Vassilakopoulos TP, Panayiotidis P, Kioumi A, Symeonidis A, Speletas M. TACI Mutations in Primary Antibody Deficiencies: A Nationwide Study in Greece. ACTA ACUST UNITED AC 2021; 57:medicina57080827. [PMID: 34441032 PMCID: PMC8401742 DOI: 10.3390/medicina57080827] [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] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 08/09/2021] [Accepted: 08/12/2021] [Indexed: 11/16/2022]
Abstract
Background and objectives: Monoallelic (heterozygous) or biallelic (homozygous or compound heterozygous) TACI mutations have been reported as the most common genetic defects in patients with common variable immunodeficiency (CVID), which is the most common clinically significant primary immunodeficiency in humans. The aim of our study was to evaluate the prevalence and any correlations of TACI defects in Greek patients with primary antibody deficiencies. Materials and Methods: 117 patients (male/female: 53/64) with CVID (110) and a combined IgA and IgG subclass deficiency (7) with a CVID-like clinical phenotype were enrolled in the study. Genomic DNA was extracted from peripheral blood and the molecular analysis of the TACI gene was performed by PCR (Polymerase Chain Reaction) and sequencing of all 5 exons, including exon–intron boundaries. Results: Seventeen patients (14.5%) displayed TACI defects, four (23.5%) carried combined heterozygous mutations and 13 (76.5%) carried single heterozygous mutations. The most frequently detected mutation was C104R (58.8%), followed by I87N (23.5%) and A181E (11.8%), while R20C, C62Y, P151L, K188M and E236X mutations were present in only one patient each. Patients with TACI defects were more frequently male (p = 0.011) and displayed a benign lymphoproliferation (splenomegaly and lymph node enlargement, p = 0.047 and p = 0.002, respectively), had a history of tonsillectomy (p = 0.015) and adenoidectomy (p = 0.031) and more frequently exhibited autoimmune cytopenias (p = 0.046). Conclusions: Considering that accumulating evidence suggests several CVID patients have a complex rather than a monogenic inheritance, our data further support the notion that TACI mutations, particularly as monoallelic defects, should be primarily considered as susceptibility co-factors and/or modifiers of primary antibody deficiencies.
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Affiliation(s)
- Ioannis Kakkas
- Immunology and Histocompatibility Department, “Evaggelismos” General Hospital, 106 76 Athens, Greece;
| | - Gerasimina Tsinti
- Department of Immunology & Histocompatibility, Faculty of Medicine, University of Thessaly, 415 00 Larissa, Greece; (G.T.); (A.K.); (E.S.); (A.-M.P.)
| | - Fani Kalala
- Hematology Department, Henry Dunant Hospital, 115 26 Athens, Greece;
| | - Evangelia Farmaki
- Pediatric Immunology and Rheumatology Referral Center, First Department of Pediatrics, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece; (E.F.); (E.P.)
| | - Alexandra Kourakli
- Department of Internal Medicine, Hematology Division, Medical School—University Hospital, University of Patras, 265 04 Patras, Greece; (A.K.); (P.P.); (A.S.)
| | - Androniki Kapousouzi
- Department of Immunology & Histocompatibility, Faculty of Medicine, University of Thessaly, 415 00 Larissa, Greece; (G.T.); (A.K.); (E.S.); (A.-M.P.)
| | - Maria Dimou
- Hematology Section, First Department of Propedeutic Internal Medicine, “Laikon” General Hospital, National and Kapodistrian University of Athens, 157 72 Athens, Greece; (M.D.); (P.P.)
| | - Vassiliki Kalaitzidou
- Department of Hematology, Papageorgiou General Hospital, 564 29 Thessaloniki, Greece; (V.K.); (A.K.)
| | - Eirini Sevdali
- Department of Immunology & Histocompatibility, Faculty of Medicine, University of Thessaly, 415 00 Larissa, Greece; (G.T.); (A.K.); (E.S.); (A.-M.P.)
| | - Athanasia-Marina Peristeri
- Department of Immunology & Histocompatibility, Faculty of Medicine, University of Thessaly, 415 00 Larissa, Greece; (G.T.); (A.K.); (E.S.); (A.-M.P.)
| | - Georgia Tsiouma
- ENT Department, “Achillopoulion” General Hospital of Volos, 382 21 Volos, Greece;
| | - Peristera Patiou
- Department of Internal Medicine, Hematology Division, Medical School—University Hospital, University of Patras, 265 04 Patras, Greece; (A.K.); (P.P.); (A.S.)
| | - Eleni Papadimitriou
- Pediatric Immunology and Rheumatology Referral Center, First Department of Pediatrics, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece; (E.F.); (E.P.)
| | - Theodoros P. Vassilakopoulos
- Department of Haematology and Bone Marrow Transplantation, “Laikon” General Hospital, National and Kapodistrian University of Athens, 157 72 Athens, Greece;
| | - Panayiotis Panayiotidis
- Hematology Section, First Department of Propedeutic Internal Medicine, “Laikon” General Hospital, National and Kapodistrian University of Athens, 157 72 Athens, Greece; (M.D.); (P.P.)
| | - Anna Kioumi
- Department of Hematology, Papageorgiou General Hospital, 564 29 Thessaloniki, Greece; (V.K.); (A.K.)
| | - Argiris Symeonidis
- Department of Internal Medicine, Hematology Division, Medical School—University Hospital, University of Patras, 265 04 Patras, Greece; (A.K.); (P.P.); (A.S.)
| | - Matthaios Speletas
- Department of Immunology & Histocompatibility, Faculty of Medicine, University of Thessaly, 415 00 Larissa, Greece; (G.T.); (A.K.); (E.S.); (A.-M.P.)
- Correspondence: ; Tel.: +30-241-350-2173; Fax: +30-241-068-5687
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8
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Karaiskos I, Daikos GL, Gkoufa A, Adamis G, Stefos A, Symbardi S, Chrysos G, Filiou E, Basoulis D, Mouloudi E, Galani L, Akinosoglou K, Arvaniti K, Masgala A, Petraki M, Papadimitriou E, Galani I, Poulakou G, Routsi C, Giamarellou H. Ceftazidime/avibactam in the era of carbapenemase-producing Klebsiella pneumoniae: experience from a national registry study. J Antimicrob Chemother 2021; 76:775-783. [PMID: 33249436 DOI: 10.1093/jac/dkaa503] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 11/06/2020] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Infections caused by KPC-producing Klebsiella pneumoniae (Kp) are associated with high mortality. Therefore, new treatment options are urgently required. OBJECTIVES To assess the outcomes and predictors of mortality in patients with KPC- or OXA-48-Kp infections treated with ceftazidime/avibactam with an emphasis on KPC-Kp bloodstream infections (BSIs). METHODS A multicentre prospective observational study was conducted between January 2018 and March 2019. Patients with KPC- or OXA-48-Kp infections treated with ceftazidime/avibactam were included in the analysis. The subgroup of patients with KPC-Kp BSIs treated with ceftazidime/avibactam was matched by propensity score with a cohort of patients whose KPC-Kp BSIs had been treated with agents other than ceftazidime/avibactam with in vitro activity. RESULTS One hundred and forty-seven patients were identified; 140 were infected with KPC producers and 7 with OXA-48 producers. For targeted therapy, 68 (46.3%) patients received monotherapy with ceftazidime/avibactam and 79 (53.7%) patients received ceftazidime/avibactam in combination with at least another active agent. The 14 and 28 day mortality rates were 9% and 20%, respectively. The 28 day mortality among the 71 patients with KPC-Kp BSIs treated with ceftazidime/avibactam was significantly lower than that observed in the 71 matched patients, whose KPC-Kp BSIs had been treated with agents other than ceftazidime/avibactam (18.3% versus 40.8%; P = 0.005). In the Cox proportional hazards model, ultimately fatal disease, rapidly fatal disease and Charlson comorbidity index ≥2 were independent predictors of death, whereas treatment with ceftazidime/avibactam-containing regimens was the only independent predictor of survival. CONCLUSIONS Ceftazidime/avibactam appears to be an effective treatment against serious infections caused by KPC-Kp.
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Affiliation(s)
- I Karaiskos
- Hygeia General Hospital, 1st Department of Internal Medicine - Infectious Diseases, Athens, Greece
| | - G L Daikos
- Laiko General Hospital, 1st Department of Medicine, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - A Gkoufa
- Laiko General Hospital, 1st Department of Medicine, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - G Adamis
- Peripheral General Hospital Athens Giorgos Gennimatas, 1st Department of Internal Medicine and Infectious Diseases Unit, Athens, Greece
| | - A Stefos
- University of Thessaly, Larissa, Department of Medicine and Research Laboratory of Internal Medicine, Larissa, Greece
| | - S Symbardi
- Thriaseio Geniko Nosokomeio Elefsinas, 1st Department of Internal Medicine, Magoula of Elefsina, Athens, Greece
| | - G Chrysos
- Peripheral General Hospital of Peiraias Tzaneio, 2nd Department of Internal Medicine and Infectious Diseases Unit, Athens, Greece
| | - E Filiou
- Sotiria General Hospital of Chest Diseases of Athens, Intensive Care Unit, 1st Department of Respiratory Medicine, Athens, Greece
| | - D Basoulis
- Laiko General Hospital, 1st Department of Medicine, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - E Mouloudi
- Ippokrateio General Hospital of Thessaloniki, Intensive Care Unit, Thessaloniki, Greece
| | - L Galani
- Hygeia General Hospital, 1st Department of Internal Medicine - Infectious Diseases, Athens, Greece
| | - K Akinosoglou
- University of Patras, Department of Medicine, Medical School, Patras, Greece
| | - K Arvaniti
- Geniko Nosokomeio Thessalonikis Papageorgiou, Intensive Care Unit and Antimicrobial Stewardship Unit, Thessaloniki, Greece
| | - A Masgala
- Konstantopouleio General Hospital Neas Ionias Patesion, 1st Department of Internal Medicine, Athens, Greece
| | - M Petraki
- Mediterraneo Hospital, Intensive Care Unit, Athens, Greece
| | - E Papadimitriou
- General Hospital of Lamia, Department of Internal Medicine, Lamia, Greece
| | - I Galani
- National and Kapodistrian University of Athens Faculty of Medicine, Infectious Diseases Laboratory, 4th Department of Internal Medicine, Athens, Greece
| | - G Poulakou
- Sotiria General Hospital of Chest Diseases of Athens, 3rd Department of Internal Medicine, National and Kapodistrian University of Athens, Medical School, Athens, Greece
| | - C Routsi
- Evaggelismos Hospital, Intensive Care Unit, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - H Giamarellou
- Hygeia General Hospital, 1st Department of Internal Medicine - Infectious Diseases, Athens, Greece
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9
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Tsiatsiou O, Papachristou S, Papadimitriou E, Michailidou E, Chatzidimitriou D, Papa A, Doulioglou V, Karyda S, Antachopoulos C, Roilides E. Epstein-Barr Encephalitis in a Child with Congenital Human Immunodeficiency Virus Infection: A Case Report Calling for No Forgetfulness. Curr HIV Res 2021; 18:63-66. [PMID: 31644409 DOI: 10.2174/1570162x17666191017101223] [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: 07/25/2019] [Revised: 09/27/2019] [Accepted: 10/04/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND In resource-rich settings, the rate of mother-to-child transmission of human immunodeficiency virus (HIV) has dramatically decreased by virtue of a combination of preventive strategies during the last two decades. CASE PRESENTATION We present a case of progressive developmental milestone loss in a toddler with previously unknown congenitally acquired human immunodeficiency virus (HIV) infection, complicated by an Epstein-Barr virus (EBV) coinfection. CONCLUSION Our report underscores the differential diagnosis between HIV encephalopathy and EBV encephalitis and the vertical transmission of the HIV infection, which constitutes an alarming issue in terms of public health.
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Affiliation(s)
- Olga Tsiatsiou
- Pediatric Infectious Diseases Unit, 1st and 3rd Departments of Pediatrics, Faculty of Medicine, Aristotle University School of Health Sciences, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece.,3rd Department of Pediatrics, Faculty of Medicine, Aristotle University School of Health Sciences, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece
| | - Savvas Papachristou
- 3rd Department of Pediatrics, Faculty of Medicine, Aristotle University School of Health Sciences, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece
| | - Eleni Papadimitriou
- Pediatric Infectious Diseases Unit, 1st and 3rd Departments of Pediatrics, Faculty of Medicine, Aristotle University School of Health Sciences, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece.,1st Department of Pediatrics, Faculty of Medicine, Aristotle University School of Health Sciences, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece
| | - Elisavet Michailidou
- Pediatric Infectious Diseases Unit, 1st and 3rd Departments of Pediatrics, Faculty of Medicine, Aristotle University School of Health Sciences, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece.,3rd Department of Pediatrics, Faculty of Medicine, Aristotle University School of Health Sciences, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece
| | - Dimitrios Chatzidimitriou
- Department of Microbiology, Faculty of Health Sciences, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Anna Papa
- Department of Microbiology, Faculty of Health Sciences, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Vai Doulioglou
- Department of Pediatrics, G. Genimatas General Hospital, Thessaloniki, Thessaloniki, Greece
| | - Stavroula Karyda
- Department of Pediatrics, G. Genimatas General Hospital, Thessaloniki, Thessaloniki, Greece
| | - Charalampos Antachopoulos
- 3rd Department of Pediatrics, Faculty of Medicine, Aristotle University School of Health Sciences, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece
| | - Emmanuel Roilides
- 3rd Department of Pediatrics, Faculty of Medicine, Aristotle University School of Health Sciences, Hippokration General Hospital of Thessaloniki, Thessaloniki, Greece
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10
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Dalma A, Petralias A, Tsiampalis T, Nikolakopoulos S, Veloudaki A, Kastorini CM, Papadimitriou E, Zota D, Linos A. Effectiveness of a school food aid programme in improving household food insecurity; a cluster randomized trial. Eur J Public Health 2021; 30:171-178. [PMID: 31127302 DOI: 10.1093/eurpub/ckz091] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Aim of this cluster randomized trial was to examine the impact of a school feeding programme combining healthy meals provision and educational activities to reduce food insecurity. METHODS Schools participating in the DIATROFI Program in Greece during the 2014-2015 school year were randomly allocated between a multicomponent intervention (MI: each student received a daily healthy meal along with educational actions; 28 schools) and an educational intervention (EI; 23 schools). A linear-mixed model was used to examine intervention effect on change from baseline in the food insecurity score, as measured via the Food Security Survey Module (FSSM). The analysis was based on 1442 pre-post intervention questionnaire pairs in the MI group and 986 in the EI group. RESULTS The reduction in food insecurity score in the MI group was statistically significantly greater compared to the EI group, by 9.8% or -0.31 [95% confidence interval (CI) -0.61 to -0.01] FSSM units after adjusting for potential confounders. MI intervention was significantly more effective compared to EI, among students in food insecure households (mean -0.44, 95% CI -0.84 to -0.04), students in households facing hunger (mean -1.04, 95% CI -1.91 to -0.17) and overweight/obese students (mean -0.36, 95% CI -0.72 to -0.01). CONCLUSION For interventions aiming to address childhood food insecurity, public health focus should be oriented towards school-based programmes combining food assistance with activities that promote healthy nutrition.
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Affiliation(s)
- Archontoula Dalma
- Institute of Preventive Medicine, Environmental & Occupational Health, Prolepsis, Maroussi, Greece.,Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Athanassios Petralias
- Institute of Preventive Medicine, Environmental & Occupational Health, Prolepsis, Maroussi, Greece.,Department of Statistics, Athens University of Economics and Business, Athens, Greece
| | - Thomas Tsiampalis
- Institute of Preventive Medicine, Environmental & Occupational Health, Prolepsis, Maroussi, Greece
| | - Stavros Nikolakopoulos
- Institute of Preventive Medicine, Environmental & Occupational Health, Prolepsis, Maroussi, Greece.,Department of Statistics, Athens University of Economics and Business, Athens, Greece
| | - Afroditi Veloudaki
- Institute of Preventive Medicine, Environmental & Occupational Health, Prolepsis, Maroussi, Greece.,Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Eleni Papadimitriou
- Institute of Preventive Medicine, Environmental & Occupational Health, Prolepsis, Maroussi, Greece
| | - Dina Zota
- Institute of Preventive Medicine, Environmental & Occupational Health, Prolepsis, Maroussi, Greece.,Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Athena Linos
- Institute of Preventive Medicine, Environmental & Occupational Health, Prolepsis, Maroussi, Greece.,Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
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11
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Chorozoglou D, Kugiumtzis D, Papadimitriou E. Investigation of the correlation of successive earthquakes preceding main shocks in the Greek territory. J Appl Stat 2021; 49:3495-3512. [DOI: 10.1080/02664763.2021.1939661] [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)
- D. Chorozoglou
- Department of Geophysics, School of Geology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - D. Kugiumtzis
- Department of Electrical and Computer Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - E. Papadimitriou
- Department of Geophysics, School of Geology, Aristotle University of Thessaloniki, Thessaloniki, Greece
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12
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Kanakoudi-Tsakalidou F, Farmaki E, Papadimitriou E, Taparkou A, Agakidou E, Glykou S, Papachristou F. Humoral Immunity against Measles in Mother-Infant Pairs during the First Year of Life in Greece: A Cross-Sectional Study. Vaccines (Basel) 2021; 9:vaccines9020143. [PMID: 33579024 PMCID: PMC7916772 DOI: 10.3390/vaccines9020143] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 02/07/2021] [Accepted: 02/09/2021] [Indexed: 11/28/2022] Open
Abstract
Measles outbreaks have surfaced in Europe during the last decades. Infants <12 months of age were the most severely affected pediatric population. The aim of this study was to investigate the duration of maternally derived measles antibodies in infants aged 1 to 12 months in relation to maternal humoral immune status and other parameters. In a prospective, cross-sectional cohort study, 124 mother/infant pairs and 63 additional infants were recruited from October 2015 through December 2019. Infants were hospitalized in a university pediatric department of a general hospital. Demographic and epidemiological data were recorded and blood samples were collected from mothers and their infants. Commercially available enzyme-linked immunosorbent assay (ELISA) was used for measuring measles antibodies. Fifty nine percent of mothers had vaccine-induced and 15% infection-acquired measles immunity. Eighty-eight percent and 94% of infants were unprotected by 5 and 10 months of age, respectively. Maternal antibody levels and infant age were significant independent predictors of infants’ antibody levels whereas the method of maternal immunity acquisition, age, and origin [Greek/non-Greek] were not. Our findings suggest that about 90% of infants are susceptible to measles beyond the age of 4 months. To our knowledge, these are the first data from Greece reported under the current community composition and epidemiological conditions.
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13
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Fotopoulou E, Lykogianni M, Papadimitriou E, Mavrikou S, Machera K, Kintzios S, Thomaidou D, Aliferis ΚΑ. Mining the effect of the neonicotinoids imidacloprid and clothianidin on the chemical homeostasis and energy equilibrium of primary mouse neural stem/progenitor cells using metabolomics. Pestic Biochem Physiol 2020; 168:104617. [PMID: 32711778 DOI: 10.1016/j.pestbp.2020.104617] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/19/2020] [Accepted: 05/20/2020] [Indexed: 06/11/2023]
Abstract
The projection of plant protection products' (PPPs) toxicity to non-target organisms at early stages of their development is challenging and demanding. Recent developments in bioanalytics, however, have facilitated the study of fluctuations in the metabolism of biological systems in response to treatments with bioactives and the discovery of corresponding toxicity biomarkers. Neonicotinoids are improved insecticides that target nicotinic acetylocholine receptors (nAChR) in insects which are similar to mammals. Nonetheless, they have sparked controversy due to effects on non-target organisms. Within this context, mammalian cell cultures represent ideal systems for the development of robust models for the dissection of PPPs' toxicity. Thus, we have investigated the toxicity of imidacloprid, clothianidin, and their mixture on primary mouse (Mus musculus) neural stem/progenitor (NSPCs) and mouse neuroblastoma-derived Neuro-2a (N2a) cells, and the undergoing metabolic changes applying metabolomics. Results revealed that NSPCs, which in vitro resemble those that reside in the postnatal and adult central nervous system, are five to seven-fold more sensitive than N2a to the applied insecticides. The energy equilibrium of NSPCs was substantially altered, as it is indicated by fluctuations of metabolites involved in energy production (e.g. glucose, lactate), Krebs cycle intermediates, and fatty acids, which are important components of cell membranes. Such evidence plausibly suggests a switch of cells' energy-producing mechanism to the direct metabolism of glucose to lactate in response to insecticides. The developed pipeline could be further exploited in the discovery of unintended effects of PPPs at early steps of development and for regulatory purposes.
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Affiliation(s)
- E Fotopoulou
- Laboratory of Pesticide Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - M Lykogianni
- Laboratory of Pesticide Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; Laboratory of Biological Control of Pesticides, Benaki Phytopathological Institute, St. Delta 8, 14561 Kifissia, Greece
| | - E Papadimitriou
- Neural Stem Cells and Neuroimaging Group, Neurobiology, Hellenic Pasteur Institute, Vasilissis Sofias 127, 11521 Athens, Greece
| | - S Mavrikou
- Laboratory of Cell Technology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - K Machera
- Laboratory of Toxicological Control of Pesticides, Benaki Phytopathological Institute, St. Delta 8, 14561 Kifissia, Greece
| | - S Kintzios
- Laboratory of Cell Technology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - D Thomaidou
- Neural Stem Cells and Neuroimaging Group, Neurobiology, Hellenic Pasteur Institute, Vasilissis Sofias 127, 11521 Athens, Greece.
| | - Κ Α Aliferis
- Laboratory of Pesticide Science, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; Department of Plant Science, McGill University, 21111 Lakeshore Road, Sainte-Anne-de-Bellevue, Quebec H9X 3V9C, Canada.
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14
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Cuthbert RJ, Jones E, Sanjurjo-Rodríguez C, Lotfy A, Ganguly P, Churchman SM, Kastana P, Tan HB, McGonagle D, Papadimitriou E, Giannoudis PV. Regulation of Angiogenesis Discriminates Tissue Resident MSCs from Effective and Defective Osteogenic Environments. J Clin Med 2020; 9:jcm9061628. [PMID: 32481579 PMCID: PMC7355658 DOI: 10.3390/jcm9061628] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 05/20/2020] [Accepted: 05/20/2020] [Indexed: 12/12/2022] Open
Abstract
Background: The biological mechanisms that contribute to atrophic long bone non-union are poorly understood. Multipotential mesenchymal stromal cells (MSCs) are key contributors to bone formation and are recognised as important mediators of blood vessel formation. This study examines the role of MSCs in tissue formation at the site of atrophic non-union. Materials and Methods: Tissue and MSCs from non-union sites (n = 20) and induced periosteal (IP) membrane formed following the Masquelet bone reconstruction technique (n = 15) or bone marrow (n = 8) were compared. MSC content, differentiation, and influence on angiogenesis were measured in vitro. Cell content and vasculature measurements were performed by flow cytometry and histology, and gene expression was measured by quantitative polymerase chain reaction (qPCR). Results: MSCs from non-union sites had comparable differentiation potential to bone marrow MSCs. Compared with induced periosteum, non-union tissue contained similar proportion of colony-forming cells, but a greater proportion of pericytes (p = 0.036), and endothelial cells (p = 0.016) and blood vessels were more numerous (p = 0.001) with smaller luminal diameter (p = 0.046). MSCs showed marked differences in angiogenic transcripts depending on the source, and those from induced periosteum, but not non-union tissue, inhibited early stages of in vitro angiogenesis. Conclusions: In vitro, non-union site derived MSCs have no impairment of differentiation capacity, but they differ from IP-derived MSCs in mediating angiogenesis. Local MSCs may thus be strongly implicated in the formation of the immature vascular network at the non-union site. Attention should be given to their angiogenic support profile when selecting MSCs for regenerative therapy.
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Affiliation(s)
- R. J. Cuthbert
- Leeds Institute of Rheumatic and Musculoskeletal Disease, University of Leeds, Leeds LS16 7PS, UK; (R.J.C.); (E.J.); (C.S.-R.); (P.G.); (S.M.C.); (H.B.T.); (D.M.)
| | - E. Jones
- Leeds Institute of Rheumatic and Musculoskeletal Disease, University of Leeds, Leeds LS16 7PS, UK; (R.J.C.); (E.J.); (C.S.-R.); (P.G.); (S.M.C.); (H.B.T.); (D.M.)
| | - C. Sanjurjo-Rodríguez
- Leeds Institute of Rheumatic and Musculoskeletal Disease, University of Leeds, Leeds LS16 7PS, UK; (R.J.C.); (E.J.); (C.S.-R.); (P.G.); (S.M.C.); (H.B.T.); (D.M.)
- Department of Biomedical Sciences, Medicine and Physiotherapy, University of A Coruña, CIBER-BBN-Institute of Biomedical Research of A Coruña (INIBIC), A Coruña 15001, Spain
| | - A. Lotfy
- Biotechnology and Life Sciences Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Beni-Suef 62511, Egypt;
| | - P. Ganguly
- Leeds Institute of Rheumatic and Musculoskeletal Disease, University of Leeds, Leeds LS16 7PS, UK; (R.J.C.); (E.J.); (C.S.-R.); (P.G.); (S.M.C.); (H.B.T.); (D.M.)
| | - S. M. Churchman
- Leeds Institute of Rheumatic and Musculoskeletal Disease, University of Leeds, Leeds LS16 7PS, UK; (R.J.C.); (E.J.); (C.S.-R.); (P.G.); (S.M.C.); (H.B.T.); (D.M.)
| | - P. Kastana
- Department of Pharmacy, School of Health Sciences, University of Patras, Patras 265 04, Greece; (P.K.); (E.P.)
| | - H. B. Tan
- Leeds Institute of Rheumatic and Musculoskeletal Disease, University of Leeds, Leeds LS16 7PS, UK; (R.J.C.); (E.J.); (C.S.-R.); (P.G.); (S.M.C.); (H.B.T.); (D.M.)
| | - D. McGonagle
- Leeds Institute of Rheumatic and Musculoskeletal Disease, University of Leeds, Leeds LS16 7PS, UK; (R.J.C.); (E.J.); (C.S.-R.); (P.G.); (S.M.C.); (H.B.T.); (D.M.)
| | - E. Papadimitriou
- Department of Pharmacy, School of Health Sciences, University of Patras, Patras 265 04, Greece; (P.K.); (E.P.)
| | - P. V. Giannoudis
- Leeds Institute of Rheumatic and Musculoskeletal Disease, University of Leeds, Leeds LS16 7PS, UK; (R.J.C.); (E.J.); (C.S.-R.); (P.G.); (S.M.C.); (H.B.T.); (D.M.)
- NIHR Leeds Biomedical Research Center, Chapel Allerton Hospital, Leeds LS7 4SA, UK
- Correspondence: ; Tel.: +44-113-392-2750; Fax: +44-113-392-3290
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Papoutsaki V, Galani I, Papadimitriou E, Karantani I, Karaiskos I, Giamarellou H. Evaluation of in vitro methods for testing tigecycline combinations against carbapenemase-producing Klebsiella pneumoniae isolates. J Glob Antimicrob Resist 2019; 20:98-104. [PMID: 31398495 DOI: 10.1016/j.jgar.2019.07.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 07/26/2019] [Accepted: 07/26/2019] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVES Treatment of infections caused by carbapenemase-producing Klebsiella pneumoniae (CPKP) frequently involves combination therapy with various antimicrobial agents in the hope of achieving synergistic effects. Routine laboratory antimicrobial synergy testing is a service that is currently unavailable owing to the laborious nature of the reference time-kill assay (TKA) as well as the widely used chequerboard method. In this study, we explored whether easier methods, based on the Etest technique, might offer a suitable alternative. METHODS In vitro interactions of tigecycline combination with colistin, gentamicin, fosfomycin or meropenem against 26 CPKP isolates were evaluated employing the TKA, chequerboard method and three Etest methodologies (the MIC/MIC ratio, the cross formation and the agar/Etest method). Rates of consequent synergy and concordance of the studied methods were determined. RESULTS All antimicrobial combinations demonstrated some degree of synergy against the CPKP isolates tested. No antagonism was observed for any of the combinations. All methods showed poor synergy concordance with the TKA, producing non-significant kappa (κ) results. Etest methods (MIC/MIC ratio and agar/Etest) exhibited fair agreement (κ=0.29 and 0.38, respectively) with the chequerboard method. CONCLUSION There is a poor correlation between synergy testing methods of tigecycline combinations, which may be associated with their different endpoints. To elucidate method comparability and reliability, their correlation with clinical outcomes appears important.
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Affiliation(s)
| | - Irene Galani
- Infectious Diseases Laboratory, 4th Department of Internal Medicine, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
| | - Eleni Papadimitriou
- Infectious Diseases Laboratory, 4th Department of Internal Medicine, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
| | - Irene Karantani
- Microbiology Department, Hygeia General Hospital, Athens, Greece
| | - Ilias Karaiskos
- 1st Internal Medicine & Infectious Diseases Clinic, Hygeia General Hospital, 4 Erythrou Stavrou Str. & Kifisias Av., Marousi Athens, 151 23 Greece
| | - Helen Giamarellou
- 1st Internal Medicine & Infectious Diseases Clinic, Hygeia General Hospital, 4 Erythrou Stavrou Str. & Kifisias Av., Marousi Athens, 151 23 Greece.
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Lippiello E, Petrillo G, Godano C, Tramelli A, Papadimitriou E, Karakostas V. Forecasting of the first hour aftershocks by means of the perceived magnitude. Nat Commun 2019; 10:2953. [PMID: 31273198 PMCID: PMC6609666 DOI: 10.1038/s41467-019-10763-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 09/11/2018] [Accepted: 05/22/2019] [Indexed: 11/09/2022] Open
Abstract
The majority of strong earthquakes takes place a few hours after a mainshock, promoting the interest for a real time post-seismic forecasting, which is, however, very inefficient because of the incompleteness of available catalogs. Here we present a novel method that uses, as only information, the ground velocity recorded during the first 30 min after the mainshock and does not require that signals are transferred and elaborated by operational units. The method considers the logarithm of the mainshock ground velocity, its peak value defined as the perceived magnitude and the subsequent temporal decay. We conduct a forecast test on the nine M ≥ 6 mainshocks that have occurred since 2013 in the Aegean area. We are able to forecast the number of aftershocks recorded during the first 3 days after each mainshock with an accuracy smaller than 18% in all cases but one with an accuracy of 36%.
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Affiliation(s)
- E Lippiello
- Department of Mathematics and Physics, University of Campania "L. Vanvitelli", Viale Lincoln, 5, 81100, Caserta, Italy.
| | - G Petrillo
- Department of Mathematics and Physics, University of Campania "L. Vanvitelli", Viale Lincoln, 5, 81100, Caserta, Italy
| | - C Godano
- Department of Mathematics and Physics, University of Campania "L. Vanvitelli", Viale Lincoln, 5, 81100, Caserta, Italy
| | - A Tramelli
- Istituto Nazionale Geofisica e Vulcanologia, Sez. Napoli, Osservatorio Vesuviano, Via Diocleziano 328, Napoli, 80124, Italy
| | - E Papadimitriou
- Geophysics Department, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - V Karakostas
- Geophysics Department, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
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Stabouli S, Gidaris D, Printza N, Dotis J, Papadimitriou E, Chrysaidou K, Papachristou F, Zafeiriou D. Sleep disorders and executive function in children and adolescents with chronic kidney disease. Sleep Med 2019; 55:33-39. [DOI: 10.1016/j.sleep.2018.11.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 11/07/2018] [Accepted: 11/14/2018] [Indexed: 10/27/2022]
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Bountzis P, Papadimitriou E, Tsaklidis G. Estimating the earthquake occurrence rates in Corinth Gulf (Greece) through Markovian arrival process modeling. J Appl Stat 2018. [DOI: 10.1080/02664763.2018.1531977] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- P. Bountzis
- Department of Geophysics, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - E. Papadimitriou
- Department of Geophysics, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - G. Tsaklidis
- Department of Mathematics, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Stabouli S, Papadimitriou E, Printza N, Dotis J, Papachristou F. Sleep disorders in pediatric chronic kidney disease patients. Pediatr Nephrol 2016; 31:1221-9. [PMID: 26482250 DOI: 10.1007/s00467-015-3237-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 09/26/2015] [Accepted: 09/28/2015] [Indexed: 11/28/2022]
Abstract
The prevalence of sleep disorders during childhood has been estimated to range from 25 to 43 %. The aim of this review is to determine the prevalence of sleep disorders and possible associations with chronic kidney disease (CKD)-related factors and health-related quality of life (HRQOL) in children with CKD. An electronic systematic literature search for sleep disorders in children with CKD in Pubmed, Embase and the Cochrane Library Databases identified seven relevant articles for review, all of which reported an increased prevalence of sleep disorders in children with CKD. Five studies included children with CKD undergoing dialysis, and two studies included only non-dialysis patients. In all studies the presence of sleep disturbances was assessed by questionnaires; only one study compared the results of a validated questionnaire with laboratory-based polysomnography. The prevalence of any sleep disorder ranged from 77 to 85 % in dialysis patients, to 32-50 % in transplanted patients and 40-50 % in non-dialysis patients. The most commonly studied disorder was restless legs syndrome, which presented at a prevalence of 10-35 %. Three studies showed significant associations between presence of sleep disorders and HRQOL. We found consistent evidence of an increased prevalence of sleep disturbances in children with CKD, and these seemed to play a critical role in HRQOL.
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Affiliation(s)
- Stella Stabouli
- Pediatric Nephrology Unit, 1st Pediatric Department, Hippokration Hospital, Aristotle University of Thessaloniki, 49 Konstantinoupoleos Street, 54642, Thessaloniki, Greece.
| | - Eleni Papadimitriou
- Pediatric Nephrology Unit, 1st Pediatric Department, Hippokration Hospital, Aristotle University of Thessaloniki, 49 Konstantinoupoleos Street, 54642, Thessaloniki, Greece
| | - Nikoleta Printza
- Pediatric Nephrology Unit, 1st Pediatric Department, Hippokration Hospital, Aristotle University of Thessaloniki, 49 Konstantinoupoleos Street, 54642, Thessaloniki, Greece
| | - John Dotis
- Pediatric Nephrology Unit, 1st Pediatric Department, Hippokration Hospital, Aristotle University of Thessaloniki, 49 Konstantinoupoleos Street, 54642, Thessaloniki, Greece
| | - Fotios Papachristou
- Pediatric Nephrology Unit, 1st Pediatric Department, Hippokration Hospital, Aristotle University of Thessaloniki, 49 Konstantinoupoleos Street, 54642, Thessaloniki, Greece
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20
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Pertsinidou CE, Tsaklidis G, Papadimitriou E, Limnios N. Application of hidden semi-Markov models for the seismic hazard assessment of the North and South Aegean Sea, Greece. J Appl Stat 2016. [DOI: 10.1080/02664763.2016.1193724] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Petralias A, Papadimitriou E, Riza E, Karagas MR, Zagouras ABA, Linos A. The impact of a school food aid program on household food insecurity. Eur J Public Health 2016; 26:290-6. [PMID: 26873860 PMCID: PMC4804736 DOI: 10.1093/eurpub/ckv223] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Background: We had a unique opportunity to establish the extent of food insecurity and the potential impact of a large-scale school-based nutritional program, in low-socioeconomic status districts of Greece, during the current economic crisis. Methods: Around 162 schools with 25 349 students participated during the 2012–2013 school year. Each student received a daily healthy meal designed by nutrition specialists. Food insecurity levels, measured using the Food Security Survey Module were assessed at baseline and after a 1–8-month intervention period. Pre–post intervention responses were matched at an individual level. Results: Around 64.2% of children’s households experienced food insecurity at baseline. This percentage decreased to 59.1% post-intervention, P < 0.001. On an individual level, food insecurity score diminished by 6.5%, P < 0.001. After adjustment for various socioeconomic factors, for each additional month of participation, the odds of reducing the food insecurity score increased by 6.3% (OR = 1.06, 95% CI: 1.02–1.11). Those experiencing food insecurity with hunger at baseline were more likely to improve food insecurity score than those who did not (OR = 3.51, 95%CI: 2.92–4.21). Conclusion: Children and families residing in low socioeconomic areas of Greece, experience high levels of food insecurity. Our findings suggest that participation in a school-based food aid program may reduce food insecurity for children and their families in a developed country in times of economic hardship.
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Affiliation(s)
- Athanassios Petralias
- Environmental and Occupational Health, Prolepsis, Institute of Preventive Medicine, Maroussi, Greece Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece Department of Statistics, Athens University of Economics and Business, Athens, Greece
| | - Eleni Papadimitriou
- Environmental and Occupational Health, Prolepsis, Institute of Preventive Medicine, Maroussi, Greece Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Elena Riza
- Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Margaret R Karagas
- Children's Environmental Health and Disease Prevention Research Center at Dartmouth, Hanover, NH, USA Section of Biostatistics and Epidemiology, Department of Community and Family Medicine, Geisel School of Medicine at Dartmouth, Hanover, NH, USA
| | - Alexia B A Zagouras
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
| | - Athena Linos
- Environmental and Occupational Health, Prolepsis, Institute of Preventive Medicine, Maroussi, Greece Department of Hygiene, Epidemiology and Medical Statistics, Medical School, National and Kapodistrian University of Athens, Athens, Greece
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Karagiannis D, Deliveliotis C, Papadimitriou E, Riza E, Lykou A, Petralias A, Papatsoris A, Linos A. Oral exposure to hexavalent chromium through drinking water and urologic morbidity in an industrial area of Greece. J Public Health (Oxf) 2015. [DOI: 10.1007/s10389-015-0681-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Vasiliadis ES, Kaspiris A, Grivas TB, Khaldi L, Lamprou M, Pneumaticos SG, Nikolopoulos K, Korres DS, Papadimitriou E. Expression of macrophage elastase (MMP12) in rat tail intervertebral disc and growth plate after asymmetric loading. Bone Joint Res 2014; 3:273-9. [PMID: 25224255 PMCID: PMC4178305 DOI: 10.1302/2046-3758.39.2000326] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVES The aim of this study was to examine whether asymmetric loading influences macrophage elastase (MMP12) expression in different parts of a rat tail intervertebral disc and growth plate and if MMP12 expression is correlated with the severity of the deformity. METHODS A wedge deformity between the ninth and tenth tail vertebrae was produced with an Ilizarov-type mini external fixator in 45 female Wistar rats, matched for their age and weight. Three groups were created according to the degree of deformity (10°, 30° and 50°). A total of 30 discs and vertebrae were evaluated immunohistochemically for immunolocalisation of MMP12 expression, and 15 discs were analysed by western blot and zymography in order to detect pro- and active MMP12. RESULTS No MMP12 expression was detected in the nucleus pulposus. Expression of MMP12 in the annulus progressively increased from group I to groups II and III, mainly at the concave side. Many growth plate chondrocytes expressed MMP12 in the control group, less in group I and rare in groups II and III. Changes in cell phenotype and reduction of cell number were observed, together with disorganisation of matrix microstructure similar to disc degeneration. ProMMP12 was detected at the area of 54 kDa and active MMP12 at 22 kDa. CONCLUSIONS Expression of MMP12 after application of asymmetric loading in a rat tail increased in the intervertebral disc but decreased in the growth plate and correlated with the degree of the deformity and the side of the wedged disc. Cite this article: Bone Joint Res 2014;3:273-9.
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Affiliation(s)
- E S Vasiliadis
- University of Athens, Third Department of Orthopaedic Surgery, KAT Hospital and Medical School, Athens, Greece
| | - A Kaspiris
- University of Patras, Laboratory of Molecular Pharmacology, School of Health Sciences, Greece
| | - T B Grivas
- Tzanio General Hospital, Department of Trauma and Orthopaedics, Piraeus, Greece
| | - L Khaldi
- University of Athens, Department of Osteopathology, Laboratory for Research of the Musculoskeletal System, School of Medicine, Athens, Greece
| | - M Lamprou
- University of Patras, Laboratory of Molecular Pharmacology, School of Health Sciences, Greece
| | - S G Pneumaticos
- University of Athens, Third Department of Orthopaedic Surgery, KAT Hospital and Medical School, Athens, Greece
| | - K Nikolopoulos
- University of Athens, Third Department of Orthopaedic Surgery, KAT Hospital and Medical School, Athens, Greece
| | - D S Korres
- University of Athens, Third Department of Orthopaedic Surgery, KAT Hospital and Medical School, Athens, Greece
| | - E Papadimitriou
- University of Patras, Laboratory of Molecular Pharmacology, School of Health Sciences, Greece
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Votsi I, Limnios N, Tsaklidis G, Papadimitriou E. Hidden Semi-Markov Modeling for the Estimation of Earthquake Occurrence Rates. COMMUN STAT-THEOR M 2014. [DOI: 10.1080/03610926.2013.857414] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kaspiris A, Khaldi L, Grivas TB, Vasiliadis E, Kouvaras I, Dagkas S, Chronopoulos E, Papadimitriou E. Subchondral cyst development and MMP-1 expression during progression of osteoarthritis: an immunohistochemical study. Orthop Traumatol Surg Res 2013; 99:523-9. [PMID: 23809184 DOI: 10.1016/j.otsr.2013.03.019] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 03/18/2013] [Accepted: 03/21/2013] [Indexed: 02/02/2023]
Abstract
BACKGROUND Subchondral bone cyst (SBC) formation is often identified in patients with osteoarthritis. Furthermore, several studies have shown that expression of matrix metalloproteinases (MMPs) is elevated in patients with OA. OBJECTIVES The aim of our study is to correlate the presence of SBCs and MMP-1 expression with the osteochondral alterations during OA progression. METHODS We studied the cartilage and subchondral bone of 15 patients who had undergone total knee or hip replacement due to primary OA. As controls, we used the femoral heads of three patients without macroscopic OA changes. We evaluated three specimens per patient. RESULTS Specimens were divided in four groups based on the Mankin histological severity score. Using immunohistochemistry, we noted SBCs at the site of greatest disease severity. Specifically, these were present more frequently in group III (Mankin score: 6-7) and IV (Mankin: ≥ 8), compared with group I (Mankin: 1-3) and II (Mankin: 4-5). Mild OA stages (Mankin: 1-6) were characterized by degeneration and thinning of the cartilage, followed by increased osteoblast and osteoclast activity of the subjacent bone and the subsequent appearance of SBCs. Simultaneously, we observed expression of MMP-1 in groups I and II in the cartilage and III and IV in both the cartilage and the subchondral bone. Moreover, osteoblast-like cells in the lining of the SBCs showed an increased expression of MMP-1 in stages III and IV. CONCLUSION Our study provides immunohistological evidence that SBCs accumulate in advanced OA and contain activated cells, which express MMP-1, suggesting that they may thus participate in the osteochondral changes of OA. LEVEL OF EVIDENCE Level III; prospective comparative study.
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Affiliation(s)
- A Kaspiris
- Department of Trauma and Orthopaedics, Thriasio General Hospital of Attica - NHS, G. Gennimata avenue, Magoula, 19600 Athens, Greece.
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Nikolakopoulos A, Kotsirilou D, Giannopoulou E, Papadimitriou E, Makatsoris T, Kalofonos H. Inhibition of Notch Pathway in Non-Small Cell Lung Cancer. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt044.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Nikolakopoulos A, Kotsirilou D, Giannopoulou E, Papadimitriou E, Makatsoris T, Kalofonos HP, Mavroeidis L, Sheldon H, Briasoulis E, Marselos M, Pappas P, Harris A, Lee JC, Rho JK, Choi CM, Park YS, Kim HR, Oliva BM, Fernandez JR, Tejeda Y, Astrada S, Garay HE, Reyes O, Delgado L, Bollati-Fogolin M, Vallespi MG, Acuna MI, Camacho C, Mendoza-Garrido ME, Huang WC, Chen YJ, Yu MC, Wei YL, Yeh MH. Poster session 2. Signal transduction targets. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Skoura L, Metallidis S, Pilalas D, Kourelis A, Margariti A, Papadimitriou E, Antoniadou ZA, Chrysanthidis T, Tsachouridou O, Kollaras P, Nikolaidis P, Malisiovas N. High rates of transmitted drug resistance among newly-diagnosed antiretroviral naïve HIV patients in Northern Greece, data from 2009-2011. Clin Microbiol Infect 2013; 19:E169-72. [PMID: 23331664 DOI: 10.1111/1469-0691.12124] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2012] [Revised: 12/02/2012] [Accepted: 12/04/2012] [Indexed: 11/27/2022]
Abstract
We conducted a retrospective study on the prevalence and correlates of transmitted drug resistance among newly-diagnosed antiretroviral naive human immunodeficiency virus (HIV) patients in Northern Greece, during the period 2009-11. Transmitted drug resistance was documented in 21.8% of patients enrolled, affecting approximately 40% of subtype A HIV-1-infected individuals. Overcoming challenges due to the ongoing financial crisis, effective preventive measures should be implemented to control further dissemination of resistant HIV strains.
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Affiliation(s)
- L Skoura
- National AIDS Reference Centre of Northern Greece, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece.
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Papadimitriou E. Editorial for issue 6/2012: Journal of Public Health. J Public Health (Oxf) 2012. [DOI: 10.1007/s10389-012-0526-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Zoidaki A, Riza E, Kastania A, Papadimitriou E, Linos A. Musculoskeletal disorders among dentists in the Greater Athens area, Greece: risk factors and correlations. J Public Health (Oxf) 2012. [DOI: 10.1007/s10389-012-0534-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Giannopoulou E, Kotsirilou D, Nikolakopoulos A, Papadimitriou E, Makatsoris T, Kalofonos H. 479 The Impact of EGF on Notch Protein Levels in Non-Small Cell Lung Cancer. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71151-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yannis G, Laiou A, Vardaki S, Papadimitriou E, Dragomanovits A, Kanellaidis G. Parameters affecting seat belt use in Greece. Int J Inj Contr Saf Promot 2011; 18:189-97. [DOI: 10.1080/17457300.2011.551941] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Lenas D, Papadimitriou E, Bitchava C, Nathanailides C. Fatty acid content and potential health benefits of consuming gilthead sea bream (Sparus aurata) and sea bass (Dicentrarchus labrax). Acta Alimentaria 2011. [DOI: 10.1556/aalim.40.2011.1.7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Skoura L, Metallidis S, Buckton AJ, Mbisa JL, Pilalas D, Papadimitriou E, Papoutsi A, Haidich AB, Valagouti D, Tsachouridou O, Antoniadou ZA, Kollaras P, Nikolaidis P, Malisiovas N. Transmitted drug resistance associated with transmission clusters in newly diagnosed antiretroviral-naïve patients in Northern Greece. J Int AIDS Soc 2010. [PMCID: PMC3112900 DOI: 10.1186/1758-2652-13-s4-p125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Abstract
In the summer of 2008, the first case of Crimean-Congo haemorrhagic fever (CCHF) was observed in Greece. The laboratory diagnosis was established using nested RT-PCR and quantitative real-time RT-PCR. A high viral load and increased levels of cytokines were detected on the third day of illness and the patient died 7 days after the onset of symptoms. Nucleotide sequence analysis revealed that the Greek CCHF virus strain had high sequence identity with other Balkan CCHF virus strains.
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Affiliation(s)
- A Papa
- First Department of Microbiology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece.
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Papadimitriou E, Unsworth BR, Maragoudakis ME, Lelkes PI. Time Course and Quantification of Extracellular Matrix Maturation in the Chick Chorioallantoic Membrane and in Cultured Endothelial Cells. ACTA ACUST UNITED AC 2009. [DOI: 10.3109/10623329309102698] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Macris A, Papadimitriou E, Vassilacopoulos G. An ontology‐based competency model for workflow activity assignment policies. J of Knowledge Management 2008. [DOI: 10.1108/13673270810913630] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Fylaktou A, Haidopoulou K, Goutaki M, Papadimitriou E, Kalamitsiou S, Papaventsis D. Measles and mumps immunity in Northern Greece, 2004-2007. Euro Surveill 2008. [DOI: 10.2807/ese.13.16.18841-en] [Citation(s) in RCA: 3] [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: 11/20/2022] Open
Abstract
A cross-sectional study was conducted in order to determine the prevalence of mumps and measles antibodies in a representative sample of the general population in Northern Greece between January 2004 and May 2007. Overall, 900 healthy individuals participated in the study. The great majority were found to be protected against measles. The total protection rate against mumps was significantly less (87% versus 72%, respectively; p<0.01). Compared to all other age groups, statistically significantly lower protection rates were found in children younger than 1.5 years (p<0.01). The lowest rates of all adult groups were found in the age group of 21 to 30 years (86% and 68% for measles and mumps, accordingly). In conclusion, protection rates against both measles and mumps seem to be lower than expected in certain age groups, such as infants and young adults.
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Affiliation(s)
- A Fylaktou
- Laboratory of Microbiology, General Hospital Papageorgiou of Thessaloniki, Greece
| | - K Haidopoulou
- Fourth Paediatric Department, Medical School, Aristotle University of Thessaloniki, Greece
| | - M Goutaki
- Fourth Paediatric Department, Medical School, Aristotle University of Thessaloniki, Greece
| | - E Papadimitriou
- Laboratory of Microbiology, General Hospital Papageorgiou of Thessaloniki, Greece
| | - S Kalamitsiou
- Fourth Paediatric Department, Medical School, Aristotle University of Thessaloniki, Greece
| | - D Papaventsis
- Laboratory of Microbiology, General Hospital Papageorgiou of Thessaloniki, Greece
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Fylaktou A, Haidopoulou K, Goutaki M, Papadimitriou E, Kalamitsiou S, Papaventsis D. Measles and mumps immunity in Northern Greece, 2004-2007. Euro Surveill 2008; 13:18841. [PMID: 18768118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
A cross-sectional study was conducted in order to determine the prevalence of mumps and measles antibodies in a representative sample of the general population in Northern Greece between January 2004 and May 2007. Overall, 900 healthy individuals participated in the study. The great majority were found to be protected against measles. The total protection rate against mumps was significantly less (87% versus 72%, respectively; p<0.01). Compared to all other age groups, statistically significantly lower protection rates were found in children younger than 1.5 years (p<0.01). The lowest rates of all adult groups were found in the age group of 21 to 30 years (86% and 68% for measles and mumps, accordingly). In conclusion, protection rates against both measles and mumps seem to be lower than expected in certain age groups, such as infants and young adults.
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Affiliation(s)
- A Fylaktou
- Laboratory of Microbiology, General Hospital Papageorgiou of Thessaloniki, Greece
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Kokolakis G, Mikelis C, Papadimitriou E, Courty J, Karetsou E, Katsoris P. Effect of heparin affin regulatory peptide on the expression of vascular endothelial growth factor receptors in endothelial cells. In Vivo 2006; 20:629-35. [PMID: 17091770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
BACKGROUND Heparin affin regulatory peptide (HARP) is an 18-kDa secreted protein that has been implicated in tumor growth and angiogenesis, although the mechanisms involved remain largely unknown. In the present work, the effect of human recombinant HARP on the expression of the vascular endothelial growth factor (VEGF) receptors KDR, Flt-1 and neuropilin-1 was studied in cultured human umbilical vein endothelial cells (HUVEC). MATERIALS AND METHODS The mRNA and protein levels of VEGF receptors were estimated by semi-quantitative RT-PCR and Western blot, respectively. Cell proliferation and migration were measured by MTT, direct counting of the cells and modified Boyden chamber assays. RESULTS HARP decreased the expression of KDR but increased the expression of Flt-1 and neuropilin-1 at both the mRNA and protein level. The effect reached a maximum 4 h after the addition of HARP into the cell culture medium and was reversed at later time-points. When HARP was added to the culture medium 4 h before the addition of VEGF165, it inhibited VEGF165-induced proliferation and migration of HUVEC. CONCLUSION These data suggest that HARP affects the expression of VEGF receptors and inhibits VEGF165-induced activation of HUVEC.
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Affiliation(s)
- G Kokolakis
- Laboratory of Molecular Pharmacology, Department of Pharmacy, University of Patras, Greece
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Papa A, Papadimitriou E, Boźović B, Antoniadis A. Genetic characterization of the M RNA segment of a Balkan Crimean-Congo hemorrhagic fever virus strain. J Med Virol 2005; 75:466-9. [PMID: 15648072 DOI: 10.1002/jmv.20290] [Citation(s) in RCA: 16] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Crimean-Congo hemorrhagic fever (CCHF) virus causes one of the most severe diseases in humans, with a mortality rate of up to 30%. It is transmitted to humans by the bite of hard ticks or by contact with blood or tissues from human patients or infected livestock. Balkan Peninsula is an endemic region of the disease, and sporadic cases or even outbreaks are observed every year. The M RNA segment encodes for the glycoprotein precursor of two surface glycoproteins Gn and Gc. Up to now complete M RNA CCHF virus sequences have been published from strains isolated in Nigeria, China, Pakistan, Tajikistan, and Russia. In the present study, the genetic characterization of the complete nucleotide sequence of the M RNA segment of a Balkan CCHF virus strain, Kosovo/9553/2001, isolated in summer of 2001 from a human fatal case in Kosovo is reported. This is the first published complete M nucleotide sequence of a CCHF virus strain isolated in Balkans. It was found that the Balkan strain is similar to the Russian strain, both strains differing from all other completely sequenced CCHF virus strains by approximately 22% at the nucleotide level forming an independent clade in the phylogenetic tree.
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Affiliation(s)
- Anna Papa
- A' Department of Microbiology, School of Medicine, Aristotle University of Thessaloniki, Greece (WHO Collaborating Center for Reference and Research on Arboviruses and Haemorrhagic Fever Viruses)
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Papadimitriou E, Loumbourdis NS. Glycogen, proteins, and aminotransferase (GOT, GPT) changes in the frog Rana ridibunda exposed to high concentrations of copper. Bull Environ Contam Toxicol 2005; 74:120-125. [PMID: 15768508 DOI: 10.1007/s00128-004-0557-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- E Papadimitriou
- Department of Zoology, University of Thessaloniki, GR 54124, Thessaloniki, Greece
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Polytarchou C, Gligoris T, Kardamakis D, Kotsaki E, Papadimitriou E. X-rays affect the expression of genes involved in angiogenesis. Anticancer Res 2004; 24:2941-5. [PMID: 15517900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
BACKGROUND We have previously shown, using the chicken embryo chorioallantoic membrane (CAM) model of in vivo angiogenesis, that X-rays act on the extracellular matrix and enhance normal and tumor-induced angiogenesis. In the present work, we studied the effect of X-rays on the gene expression of three proteins that are important regulators of angiogenesis: vascular endothelial growth factor (VEGF), heparin affin regulatory peptide (HARP) and inducible nitric oxide synthase (iNOS). MATERIALS AND METHODS An area of 1 cm2 of the CAM, restricted by a plastic ring was irradiated at room temperature. The expression of the genes was studied using RT-PCR and the amounts of the mRNAs were quantified using image analysis of the corresponding agarose gels of the RT-PCR products. RESULTS VEGF mRNA was decreased 6 h after irradiation. However, at later time points, VEGF expression was significantly increased compared with the nonirradiated tissue. Similarly, X-rays down-regulated both HARP and iNOS expression 6 h after irradiation and the effect was reversed at later time points, similarly to the effect of X-rays on VEGF. CONCLUSION These data support the notion that X-rays increase the expression of genes that favor angiogenesis.
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Affiliation(s)
- C Polytarchou
- Laboratory of Molecular Pharmacology, Department of Pharmacy, School of Health Sciences, University of Patras, GR 26504, Greece
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Papadimitriou E, Polykratis A, Hatziapostolou M, Parthymou A, Polytarchou C, Mikelis C. Heparin Affin Regulatory Peptide: A New Target for Tumour Therapy? Curr Cancer Drug Targets 2004; 4:471-82. [PMID: 15379633 DOI: 10.2174/1568009043332835] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Heparin affin regulatory peptide (HARP), also known as pleiotrophin or heparin-binding growth-associated molecule, is an 18-kDa growth factor that has a high affinity for heparin. It constitutes with midkine and retinoic acid heparin-binding protein, a family of structurally related heparin-binding growth factors. A growing body of evidence indicates that HARP is involved in the control of cellular proliferation, migration and differentiation and plays a significant role in tumor growth and angiogenesis. HARP has a well described role in physiological as well as tumor angiogenesis, and is detected in various carcinomas, such as human breast and prostate cancer, neuroblastomas, gliomas, benign meningiomas, small cell lung cancer and mammary tumors, exhibiting a proto-oncogene function. It is also constitutively expressed in tumour cell lines and is involved in tumour growth and metastasis. Therefore, HARP appears to be a potential new target for the treatment or/and diagnosis of several types of cancer.
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Affiliation(s)
- E Papadimitriou
- Laboratory of Molecular Pharmacology, Department of Pharmacy, University of Patras, Greece.
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Kaditis AG, Papadimitriou E, Alexopoulos E, Skenteris N, Gidvani VK, Crouch G, Baptist EC, Deol KK, Nageswaran S, Glock MS, Hill ID, Ermis B, Ors R, Kardas F. Index of suspicion. Pediatr Rev 2004; 25:29-40. [PMID: 14702520 DOI: 10.1542/pir.25-1-29] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Polykratis A, Papadimitriou E, Delbe J, Courty J, Katsoris P. 588 HARP peptides modulate the in vitro angiogenic activity of VEGF. EJC Suppl 2003. [DOI: 10.1016/s1359-6349(03)90620-3] [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] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Hountala M, Arsenou E, Nikolaropoulos S, Hatziapostolou M, Papadimitriou E. 996 Effect of retinoic acid analogue on tumor growth and angiogenesis. EJC Suppl 2003. [DOI: 10.1016/s1359-6349(03)91023-8] [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] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Giannopoulou E, Kardamakis D, Papadimitriou E. 590 Amifostine modulates endothelial cell proliferation and migration. EJC Suppl 2003. [DOI: 10.1016/s1359-6349(03)90622-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Papadimitriou E, Waters CR, Manolopoulos VG, Unsworth BR, Maragoudakis ME, Lelkes PI. Regulation of extracellular matrix remodeling and MMP-2 activation in cultured rat adrenal medullary endothelial cells. Endothelium 2003; 8:243-53. [PMID: 11824476 DOI: 10.3109/10623320109090801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We previously reported that short-term exposure of cultured rat adrenal medullary endothelial cells (RAMEC) to thrombin enhances the subendothelial deposition of extracellular matrix (ECM) proteins fibronectin, laminin, and collagen types I (C-I) and IV (C-IV) (Papadimitriou et al. 1997). In this work, we extended our previous studies on factors that effect ECM protein deposition to include agents that activate or inhibit some of the most common intracellular signals such as cAMP, protein kinase C (PKC), and calcium. Furthermore, we investigated the possible link between the observed alterations in ECM protein deposition and the secretion of matrix metalloproteinase-2 (MMP-2). Forskolin (adenylyl cyclase activator) caused a dose-dependent increase in the deposition of all four ECM proteins studied. Isoproterenol beta-adrenergic receptor agonist) and the membrane permeant cAMP analogue dibutyryl-cAMP significantly increased the deposited amounts of ECM proteins at low concentrations, and this increase was reversed at higher concentrations of both agents. All these agents had the opposite effect on MMP-2 secretion, increasing it at doses where they decreased ECM protein deposition and vice versa. However, elevation of cAMP by the phosphodiesterase inhibitor IBMX had no effect either on the deposited amounts of any of the ECM proteins studied or on MMP-2 secretion. Activation of PKC by phorbol ester (PMA) resulted in a decrease in ECM protein deposition and an increase in MMP-2 secretion. Finally, chelation of intercellular calcium with BAPTA-AM resulted in an increased ECM deposition and a decrease in MMP-2 secretion. Our results show a complex pattern of regulation of ECM protein deposition by cAMP-mobilizing agents and also indicate an inverse correlation between ECM protein deposition and secretion of MMP-2. The concerted regulation of both of these processes is essential in the formation of new blood vessels, and for the integrity of the vascular wall.
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Affiliation(s)
- E Papadimitriou
- Dept. of Pharmacy, Univ. of Wisconsin Medical School, Milwaukee, USA
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Papadimitriou E, Waters CR, Manolopoulos VG, Unsworth BR, Maragoudakis ME, Lelkes PL. Regulation of extracellular matrix remodeling and MMP-2 activation in cultured rat adrenal medullary endothelial cells. Endothelium 2003; 8:181-94. [PMID: 11824471 DOI: 10.1080/10623320109051564] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
We previously reported that short term exposure of cultured rat adrenal medullary endothelial cells (RAMEC) to thrombin enhances the subendothelial deposition of extracellular matrix (ECM) proteins fibronectin, laminin, and collagen types I (C-I) and IV (C-IV) (Papadimitriou et at., 1997). In this work, we extended our previous studies on factors that affect ECM protein deposition to include agents that activate or inhibit some of the most common intracellular signals such as cAMP, protein kinase C (PKC) and calcium. Furthemore, we investigated the possible link between the observed alterations in ECM protein deposition and the secretion of matrix metalloproteinase-2 (MMP-2). Forskolin (adenylyl cyclase activator) caused a dose-dependent increase in the deposition of all four ECM proteins studied. Isoproterenol (beta-adrenergic receptor agonist) and the membrane-permeant cAMP analogue dibutyryl-cAMP, significantly increased the deposited amounts of ECM proteins at low concentrations, and this increase was reversed at higher concentrations of both agents. All these agents had the opposite effect on MMP-2 secretion, increasing it at doses where they decreased ECM protein deposition and vice-versa. However, elevation of cAMP by the phosphodiesterase inhibitor IBMX had no effect neither on the deposited amounts of any of the ECM proteins studied nor on MMP-2 secretion. Activation of PKC by phorbol ester (PMA) resulted in a decrease in ECM protein deposition and an increase in MMP-2 secretion. Finally, chelation of intercellular calcium with BAPTA-AM resulted in an increased ECM deposition and a decrease in MMP-2 secretion, Our results show a complex pattern of regulation of ECM protein deposition by cAMP-mobilizing agents, and also indicate an inverse correlation between ECM protein deposition and secretion of MMP-2. The concerted regulation of both these processes is essential in the formation of new blood vessels and for the integrity of the vascular wall.
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