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The aim of this study was to compare the effects of accelerated aging on the overall color stability of potentially color adjusting commercial resin-based composite resins. Thirty specimens (10 mm diameter and 2.5 mm thick; n=6) were fabricated using five different materials: Estelite Omega, GC Kalore, Venus Pearl, Harmonize, and Omnichroma. Color measurements were taken for each sample using a spectrophotometer before and after submitting samples through the artificial aging process (Q-sun Xenon Test Chamber, 102 min light at 63°C black panel temperature; 18 min light and water spray per ASTM G155) for a total of 300 hours (12.5 days). The total color difference (ΔE*ab) was calculated using SpectraMagic NX software and analyzed using one-way analysis of variance and Tukey test. The results for color change (ΔE*ab) were statistically significant. Omnichroma and Venus Pearl presented superior color stability and the lowest overall color change, whereas GC Kalore and Harmonize presented significant color change that would be considered clinically unacceptable (ΔE*ab > 3.3).
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Resinas Compostas , Materiais Dentários , Cor , Teste de Materiais , EspectrofotometriaRESUMO
INTRODUCTION: The current new SARS-CoV-2 pandemic has had a profound impact on medical practice. The objective was to analyse the ethical questions raised by the French ENT community during the first wave of COVID-19 infections. METHODS: Four open-ended questions concerning ethical considerations in ENT were sent out in April 2020: (i) difficulties to care for COVID-19 positive patients; (ii) impact of the health crisis on COVID-19 negative patients; (iii) communication within the healthcare teams and with hospital staff; and (iv) management of information by the press, or national ENT societies. A thematic analysis was carried out and crossed with the epidemiological data of each respondent. RESULTS: Thirty-one responses from 13 different French Departments, including 21 from public institutions and 10 from private practice, median age of 45 and 17 men for 14 women, were analysed. The main ethical considerations concerned the management by ENTs of COVID-19 positive patients, the modification of practices in consultation and in the operating room, the fear of loss of chance for COVID-19 negative patients, the appropriate use of teleconsultations and teleworking and the consequences of fake-news for the population. CONCLUSION: In preparation of possible future pandemic outbreaks, key ethical aspects are to adapt patient management to local resources and infection prevalence, and circulate clear institutional guidelines.
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OBJECTIVE: Multi-centre study of the National French Registry (EPIIC) of patients with cochlear implants, focusing on infants who were operated-on under the age of 24 months between 2012 and 2016. PATIENTS AND METHODS: A total of 615 profoundly deaf infants, who received cochlear implants (CIs) before their second birthday, were included in the registry by different CI centers. Epidemiological, surgical, speech therapy and school, follow-up data were included in the registry, 12, 24, 36 and 48 months thereafter. The following parameters were studied: type of implantation (uni- or bilateral), complications, cause of deafness, category of auditory perception (CAP), Open-set word recognition score (OSW), speech intelligibility rating, lexical comprehension with EVIP (Peabody), communication mode and type of schooling. Bilateral simultaneous CI (BiCI) and unilateral CI (UniCI) groups were compared. RESULTS: There were 744 implantations. The explantation-reimplantation rate, within the four-year follow-up, was just 3.6%. Mean implantation age was 16.0 months, and similar in the two groups (BiCI/UniCI). A total of 51% of children had their first implant between 12 and 18 months, and 15% before 12 months. Implantation was unilateral in 52% of cases. Fifty-six percent of the bilateral procedures were sequential, with a mean delay of 16.8 months for the second implantation. The cause of deafness was unknown in 52% of cases. Of the 48% (297/615) of attributed cases, 32% had clear genetic causes. The remaining deafness was due to cytomegalovirus (CMV, 8%), inner-ear malformation (5%) and meningitis (3%). The main complications were from infections (47%) and internal device failure (25%). Four years post-operation, 84% of the UniCI and 75% of BiCl groups had a CAP≥5, and 83% of UniCl and 100% BiCI had OSW≥80%. Furthermore 74% of UniCI and 77% of BiCI communicated orally and 85% of UniCI and 90% of BiCI integrated into mainstream schooling. CONCLUSION: The French Registry of cochlear implants (EPIIC) is the only such national registry in the world. Our analysis illustrates the immediate benefits of, either single or double, cochlear implantation for language, perception skills and schooling.
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Percepção Auditiva , Linguagem Infantil , Implante Coclear/estatística & dados numéricos , Implantes Cocleares/estatística & dados numéricos , Surdez/reabilitação , Sistema de Registros/estatística & dados numéricos , Fatores Etários , Implante Coclear/efeitos adversos , Implante Coclear/métodos , Implantes Cocleares/efeitos adversos , Comunicação , Correção de Deficiência Auditiva/instrumentação , Correção de Deficiência Auditiva/estatística & dados numéricos , Surdez/etiologia , Remoção de Dispositivo/estatística & dados numéricos , Educação de Pessoas com Deficiência Auditiva/métodos , Educação de Pessoas com Deficiência Auditiva/estatística & dados numéricos , Seguimentos , França , Humanos , Lactente , Recém-Nascido , Inclusão Escolar/estatística & dados numéricos , Reoperação/estatística & dados numéricos , Instituições Acadêmicas , Inteligibilidade da Fala , Fonoterapia/estatística & dados numéricos , Fatores de TempoRESUMO
This study aims to determine the frequency and causes of cochlear explants with re-implantation (ERI) after 5 years' follow up of the patients included in the French national EPIIC (étude post-inscription des implants cochléaires) registry tracking patients with cochlear implantation. This multicenter, descriptive prospective study was conducted on 5051 patients enrolled in the EPIIC database between January 2012 and December 2016. Ninety-five patients (1.9%) received a primary implant and an ERI during the study. Of these, four benefitted from two ERIs. The number of ERIs was significantly higher in the pediatric population than among adults. The explantation and reimplantation were performed simultaneously in 86% of cases. The reasons for explantation were: in 46.4% of cases linked to a malfunction of the implant, and in 39.3% of cases for medical or surgical reasons. The number of electrodes inserted was significantly higher after the ERI than after the first implantation. There was just one post-ERI infection for these 95 explanted and re-implanted patients. As well as explantation with reimplantation rarely being necessary, it generally presents no major surgical difficulty and in most cases it allows a better integration than in the first implantation.
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Implante Coclear/estatística & dados numéricos , Implantes Cocleares/estatística & dados numéricos , Remoção de Dispositivo/estatística & dados numéricos , Sistema de Registros/estatística & dados numéricos , Reoperação/estatística & dados numéricos , Adolescente , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Criança , Pré-Escolar , Implantes Cocleares/efeitos adversos , França , Humanos , Lactente , Pessoa de Meia-Idade , Estudos Prospectivos , Falha de Prótese , Reimplante/estatística & dados numéricos , Fatores de Tempo , Adulto JovemRESUMO
OBJECTIVES: The aim of this study was to evaluate peri- and post-operative complications related to cochlear implantations. We searched for risk factors predicting these complications and analyzed the complications in the youngest and most elderly. STUDY DESIGN: Retrospective analysis of cochlear implant patients. MATERIALS AND METHODS: All patients who underwent cochlear implantation in France between January 2012 and December 2016 were anonymized and registered in the EPIIC database. This population included 3483 adults and 2245 children. Their demographic and surgical data and their incidence of peri- or post-operative complications, including their severity, whether major or minor, were all indicated. RESULTS: The global complication rate was 6.84%. The risk of complication was higher in initial implantation versus reimplantation (P<0.0001). The risk was also higher for bilateral implantation versus unilateral (P<0.0001). Complications were more frequent for patients with cochlear malformation (P=0.002). There was no difference in complication rates across age groups; babies under 1 year old, and the elderly over 80 and even over 90, did not have more complications than the rest of the population. Patients treated in the daily care unit had no more complications than those who were hospitalized for one night or more (P=0.64). CONCLUSION: Cochlear implantation is a safe technique with a low incidence of complications. The absence of increased risk in patients at the extremes of the age spectrum justifies offering this solution to all, without age limitation.
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Implante Coclear/efeitos adversos , Perda Auditiva/reabilitação , Complicações Intraoperatórias/epidemiologia , Complicações Pós-Operatórias/epidemiologia , Sistema de Registros/estatística & dados numéricos , Adolescente , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Criança , Pré-Escolar , Cóclea/anormalidades , Implante Coclear/métodos , Hospital Dia/estatística & dados numéricos , França/epidemiologia , Perda Auditiva/etiologia , Hospitalização/estatística & dados numéricos , Humanos , Incidência , Lactente , Pessoa de Meia-Idade , Reoperação/efeitos adversos , Reoperação/estatística & dados numéricos , Estudos Retrospectivos , Fatores de Risco , Adulto JovemRESUMO
OBJECTIVE: Evaluate in France the outcomes of cochlear implantation outside the selection criteria, off-label. MATERIAL AND METHODS: This is a prospective cohort study including adults and children having received a cochlear implant (CI) in an off-label indication, that is outside the criteria established by the "Haute Autorité de santé (HAS)" in 2012. The data was collected from the "EPIIC" registry on recipients who received CIs in France between 2011 and 2014. Speech audiometry was performed at 60dB preimplantation and after one year of CI use, as well as an evaluation of the scores of the quality of life with the APHAB questionnaire, the scores for CAP and the professional/academic status in pre- and post-implantation conditions. Major and minor complications at surgery have been recorded. RESULTS: In total, 590 patients (447 adults and 143 children) with an off-label indication for CIs were included in this study from the EPIIC registry (11.7% of the whole cohort of EPIIC). For adults, the median percentage of comprehension using monosyllabic word lists was 41% in preimplantation condition versus 53% after one year of CI use (P<0.001) and 60% versus 71% in dissyllabic word lists (P<0.001). The CAP scores were 5 versus 6 in pre- and post-implantation conditions respectively (P<0.001) and the APHAB scores were statistically lower after implantation (P<0.001). In the children cohort, the median percentage of comprehension using monosyllabic word lists was 51% in preimplantation condition and 65% after CI (P<0.001), and 48% versus 82% (P<0.001) for dissyllabic word lists. The CAP scores were 5 versus 7 respectively in pre- and post-CI conditions (P<0.001). Thirty-two minor complications (5.4%) and 17 major complications (2.8%) were reported in our panel of off-label indication patients. CONCLUSION: These results suggest that a revision of the cochlear implantation candidacy criteria is necessary to allow more patients with severe or asymmetric hearing loss to benefit from a CI when there is an impact on quality of life despite the use of an optimal hearing aid.
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Implante Auditivo de Tronco Encefálico/estatística & dados numéricos , Implante Coclear/estatística & dados numéricos , Implantes Cocleares/estatística & dados numéricos , Perda Auditiva/reabilitação , Seleção de Pacientes , Sistema de Registros/estatística & dados numéricos , Adolescente , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Audiometria da Fala/métodos , Criança , Pré-Escolar , Implante Coclear/efeitos adversos , Implantes Cocleares/efeitos adversos , Feminino , França/epidemiologia , Inquéritos Epidemiológicos , Humanos , Masculino , Pessoa de Meia-Idade , Uso Off-Label/estatística & dados numéricos , Complicações Pós-Operatórias/epidemiologia , Período Pós-Operatório , Cuidados Pré-Operatórios , Estudos Prospectivos , Qualidade de Vida , Adulto JovemRESUMO
OBJECTIVES: To analyze the performance of cochlear implants in French patients aged 65 and over, implanted between 2012 and 2016, using data from the French national registry for cochlear implants (EPIIC). MATERIALS AND METHODS: The French national registry incorporates patient data from before implantation and for three years after implantation, stratified in different age groups (18-39, 40-64years, 65-74years and>75years). Here, we assessed the latter two categories. Hearing was assessed using mono- and disyllabic words in a silent background. The Category of Auditory Performance (CAP) scale was also implemented and subjects took the Abbreviated Profile of Hearing Aid Benefit (Aphab) questionnaire. RESULTS: The population aged over 65 accounted for 38% (n=1193) of the 3178 adult implanted patients. The performance for mono- and disyllabic words in silence, the CAP scores and the APHAB questionnaire answers for ease of communication, background noise and reverberation were dramatically improved at one year post-implantation (P<0.0001 for each score) and remained stable between one and three years thereafter. The percentage improvement was similar across all age groups. The scores for loud-noise intolerance did not change after cochlear implantation in any age group. CONCLUSION: Cochlear implants improve hearing and communication in subjects aged 65 and over, with comparable efficiency to that achieved in younger subjects. Cochlear implantation should thus be proposed whenever hearing aids provide only limited benefit. However, between 2012 and 2016, cochlear implantation was given to less than 1% of the French population aged 65 and over with profound deafness.
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Implante Coclear/estatística & dados numéricos , Implantes Cocleares/estatística & dados numéricos , Perda Auditiva/reabilitação , Sistema de Registros/estatística & dados numéricos , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Percepção Auditiva , Implante Coclear/métodos , Comunicação , Feminino , França , Inquéritos Epidemiológicos , Perda Auditiva/etiologia , Testes Auditivos/métodos , Humanos , Masculino , Pessoa de Meia-Idade , Ruído/efeitos adversos , Estudos Retrospectivos , Fatores de Tempo , Adulto JovemRESUMO
OBJECTIVES: Assessment of the incidence and results of bilateral cochlear implantation in adults and children in France. MATERIALS AND METHODS: Multicenter retrospective study of data in the French national registry of cochlear implantations from January 1st 2012 to December 31st 2016. Functional results from CAP (Category of Auditory Performance) questionnaires and speech audiometry tests, with mono- and di-syllabic word-lists, were compared before and after implantation. Speech audiometry tests were carried out against a noisy background, except before simultaneous implantations. RESULTS: Nine hundred and forty two bilateral cochlear implantations were performed during this period, that is, 16.4% of all cochlear implantations. Five hundred and eighty eight bilateral implantations were performed sequentially. 59% of the bilateral implantations were performed in children. Bilateral implants significantly improved CAP scores in all cases (P<0.001). Auditory performance, with the two types of word-list, were significantly improved after simultaneous implantation (P<0.01). After sequential implantation, the speech discrimination score, already very good with the first implant, reached 63±26% [0-100] with monosyllabic word lists, and 72±28% [0-100] with dissyllabic words. There were more complications due to surgery in bilateral cases than in the entire population of cochlear recipients (9.1% vs 6.4%, P<0.02). CONCLUSION: Hearing is significantly improved by simultaneous cochlear implantation. For sequential implantation, at one year, when auditory results were already excellent from the first implant, in the bimodal condition CAP scores were significantly improved, although there was no further change in speech audiometry in noise.
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Implante Coclear/métodos , Implantes Cocleares/estatística & dados numéricos , Surdez/reabilitação , Sistema de Registros/estatística & dados numéricos , Adulto , Audiometria da Fala/métodos , Percepção Auditiva , Criança , Implante Coclear/efeitos adversos , Implante Coclear/estatística & dados numéricos , Surdez/etiologia , Feminino , França , Humanos , Masculino , Complicações Pós-Operatórias/epidemiologia , Estudos Retrospectivos , Testes de Discriminação da Fala/estatística & dados numéricosRESUMO
This study concerns the results of cochlear implantation in children and adults from French cochlear implantation centers, monitored at one, two and three years by the Cochlear Implant French Registry EPIIC. This multicenter study enrolled 2603 subjects (1667 adults and 936 children) implanted in one ear. The following parameters were studied: hearing overall performances, monosyllabic or dissyllabic word perception, speech intelligibility, self-assessment questionnaire of Cochlear Implant (CI) benefits (Abbreviated profile of Hearing aid Benefit); professional activity and schooling. This study confirms the ceiling effect in adults' performances after the 1st year and the progressive growth in children's performances. It also shows that the contralateral hearing aid enhances performances compared to the CI alone condition, in all follow-up sessions. The French register of CIs is the only worldwide register of systematic follow-up on a period of three years and more of all adults and children implanted in a country.
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Implante Coclear/estatística & dados numéricos , Implantes Cocleares/estatística & dados numéricos , Surdez/reabilitação , Qualidade de Vida , Sistema de Registros/estatística & dados numéricos , Adolescente , Adulto , Fatores Etários , Percepção Auditiva , Criança , Pré-Escolar , Educação , Emprego , Seguimentos , França , Humanos , Lactente , Recém-Nascido , Autoavaliação (Psicologia) , Inteligibilidade da Fala , Inquéritos e Questionários , Fatores de Tempo , Resultado do TratamentoRESUMO
This consensus statement about the indications and modalities of corticosteroid treatment in the context of the COVID-19 pandemic was jointly written by experts from the French Association of Otology and Oto-Neurology (AFON) and from the French Society of Otorhinolaryngology, Head and Neck Surgery (SFORL). There is currently not enough data in favour of danger or benefit from corticosteroids in COVID-19, so until this matter is resolved it is advisable to limit their indications to the most serious clinical pictures for which it is well established that this type of treatment has a positive impact on the progression of symptoms. In Grade V and VI Bell's palsy according to the House-Brackmann grading system, a week's course of oral corticosteroids is recommended. Corticosteroid therapy is also recommended in cases of sudden hearing loss of more than 60dB, either in the form of intratympanic injections or a week's course of oral medication. In rhinology, there is no indication for systemic corticosteroid therapy in the current situation. However, patients are advised to continue with their local corticosteroid therapy in the form of a nasal spray or by inhalation. Treatments with corticosteroid nasal sprays can still be prescribed if there is no alternative. Finally, systemic or local corticosteroid therapy is not indicated for bacterial ENT infections.
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Corticosteroides/uso terapêutico , Infecções por Coronavirus/tratamento farmacológico , Otorrinolaringopatias/tratamento farmacológico , Pneumonia Viral/tratamento farmacológico , COVID-19 , Infecções por Coronavirus/complicações , Humanos , Otorrinolaringopatias/virologia , Pandemias , Pneumonia Viral/complicaçõesRESUMO
The identification of disease-causing mutations has in recent years progressed immensely due to whole genome sequencing approaches using patient material. The task accordingly is shifting from gene identification to functional analysis of putative disease-causing genes, preferably in an in vivo setting which also allows testing of drug candidates or biotherapeutics in whole animal disease models. In this review, we highlight the advances made in the field of bone diseases using small laboratory fish, focusing on zebrafish and medaka. We particularly highlight those human conditions where teleost models are available.
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Doenças Ósseas/genética , Doenças Ósseas/fisiopatologia , Oryzias/genética , Peixe-Zebra/genética , Animais , Pesquisa Biomédica , Modelos Animais de Doenças , Genoma/genética , Sequenciamento Completo do GenomaRESUMO
Sideroflexin4 (SFXN4) is a member of a family of nuclear-encoded mitochondrial proteins. Rare germline mutations in SFXN4 lead to phenotypic characteristics of mitochondrial disease including impaired mitochondrial respiration and hematopoetic abnormalities. We sought to explore the function of this protein. We show that knockout of SFXN4 has profound effects on Fe-S cluster formation. This in turn diminishes mitochondrial respiratory chain complexes and mitochondrial respiration and causes a shift to glycolytic metabolism. SFXN4 knockdown reduces the stability and activity of cellular Fe-S proteins, affects iron metabolism by influencing the cytosolic aconitase-IRP1 switch, redistributes iron from the cytosol to mitochondria, and impacts heme synthesis by reducing levels of ferrochelatase and inhibiting translation of ALAS2. We conclude that SFXN4 is essential for normal functioning of mitochondria, is necessary for Fe-S cluster biogenesis and iron homeostasis, and plays a critical role in mitochondrial respiration and synthesis of heme.
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Heme/biossíntese , Ferro/metabolismo , Proteínas de Membrana/metabolismo , Mitocôndrias/metabolismo , Consumo de Oxigênio , 5-Aminolevulinato Sintetase/genética , 5-Aminolevulinato Sintetase/metabolismo , Aconitato Hidratase/genética , Aconitato Hidratase/metabolismo , Técnicas de Inativação de Genes , Glicólise , Células HEK293 , Heme/genética , Células Hep G2 , Humanos , Proteína 1 Reguladora do Ferro/genética , Proteína 1 Reguladora do Ferro/metabolismo , Células K562 , Proteínas de Membrana/genética , Mitocôndrias/genéticaRESUMO
Birth by Cesarean section increases the risk of developing type 1 diabetes later in life. We aimed to elucidate common regulatory processes observed after Cesarean section and the development of islet autoimmunity, which precedes type 1 diabetes, by investigating the transcriptome of blood cells in the developing immune system. To investigate Cesarean section effects, we analyzed longitudinal gene expression profiles from peripheral blood mononuclear cells taken at several time points from children with increased familial and genetic risk for type 1 diabetes. For islet autoimmunity, we compared gene expression differences between children after initiation of islet autoimmunity and age-matched children who did not develop islet autoantibodies. Finally, we compared both results to identify common regulatory patterns. We identified the pentose phosphate pathway and pyrimidine metabolism - both involved in nucleotide synthesis and cell proliferation - to be differentially expressed in children born by Cesarean section and after islet autoimmunity. Comparison of global gene expression signatures showed that transcriptomic changes were systematically and significantly correlated between Cesarean section and islet autoimmunity. Moreover, signatures of both Cesarean section and islet autoimmunity correlated with transcriptional changes observed during activation of isolated CD4+ T lymphocytes. In conclusion, we identified shared molecular changes relating to immune cell activation in children born by Cesarean section and children who developed autoimmunity. Our results serve as a starting point for further investigations on how a type 1 diabetes risk factor impacts the young immune system at a molecular level.
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Autoimunidade/genética , Cesárea/efeitos adversos , Regulação da Expressão Gênica , Ilhotas Pancreáticas/imunologia , Autoanticorpos/sangue , Linfócitos T CD4-Positivos , Criança , Pré-Escolar , Diabetes Mellitus Tipo 1/imunologia , Feminino , Humanos , Lactente , Leucócitos Mononucleares/fisiologia , Fatores de RiscoRESUMO
AIMS: Children and adolescents with a family history of diabetes are at increased risk of overweight, but little is known about the potentially beneficial effects of physical activity on these children. The objective of this study was to investigate the association between moderate to vigorous physical activity (MVPA) and metabolic and inflammatory risks in children and adolescents with a family background of Type 1 diabetes or gestational diabetes. METHODS: Valid MVPA measurements, made with accelerometers, were available from 234 participants (median age, 10.2 years) who had a first-degree relative with either Type 1 or gestational diabetes. Anthropometric and metabolic measurements were made and cytokines measured, and were correlated with MVPA measurements, with stepwise adjustment for confounding factors, in a cross-sectional analysis. RESULTS: MVPA was negatively associated with insulin and C-peptide during challenge with an oral glucose tolerance test. MVPA was also significantly positively associated with the insulin sensitivity index, whereas no consistently significant associations were found between MVPA and BMI, blood pressure or cytokine levels. DISCUSSION: Our findings indicate that physical activity may have beneficial effects on insulin and C-peptide metabolism in children and adolescents with a family background of diabetes, but show no evidence of a protective association with other health-related outcomes.
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Peptídeo C/sangue , Diabetes Mellitus Tipo 1 , Diabetes Gestacional , Exercício Físico/fisiologia , Glucose/farmacologia , Insulina/sangue , Anamnese , Adolescente , Criança , Estudos de Coortes , Estudos Transversais , Diabetes Mellitus Tipo 1/epidemiologia , Diabetes Gestacional/epidemiologia , Feminino , Alemanha/epidemiologia , Teste de Tolerância a Glucose , Humanos , Masculino , Anamnese/estatística & dados numéricos , Gravidez , Fatores de RiscoRESUMO
BACKGROUND: A wide range of studies has investigated the diagnostic proficiency of extracellular microRNAs (miRNAs) in hepatocellular cancer (HCC). HCC is expected to increase in Sub-Saharan Africa (SSA), due to endemic levels of viral infection (HBV/HIV), ageing and changing lifestyles. This unique aetiological background provides an opportunity for investigating potentially novel circulating miRNAs as biomarkers for HCC in a prospective study in South Africa. METHODS: This study will recruit HCC patients from two South African cancer hospitals, situated in Durban and Pietermaritzburg in the province of KwaZulu-Natal. These cases will include both HBV mono-infected and HBV/HIV co-infected HCC cases. The control group will consist of two (2) age and sex-matched healthy population controls per HCC case randomly selected from a Durban based laboratory. The controls will exclude patients if they have any evidence of chronic liver disease. A standardised reporting approach will be adopted to detect, quantify and normalize the level of circulating miRNAs in the blood sera of HCC cases and their controls. Reverse transcription quantitative polymerase chain reaction (RT-qPCR) will be employed to quantity extracellular miRNAs. Differences in concentration of relevant miRNA by case/control status will be assessed using the Wilcoxon rank-sum (Mann-Whitney U) test. Adjustment for multiple testing (Bonferroni correction), receiver operating curves (ROC) and optimal breakpoint analyses will be employed to identify potential thresholds for the differentiation of miRNA levels of HCC cases and their controls. DISCUSSION: Although there is a growing base of literature regarding the role of circulating miRNAs as biomarkers, this promising field remains a 'work in progress'. The aetiology of HBV infection in HCC is well understood, as well as it's role in miRNA deregulation, however, the mediating role of HIV infection is unknown. HCC incidence in SSA, including South Africa, is expected to increase significantly in the next decade. A combination of factors, therefore, offers a unique opportunity to identify candidate circulating miRNAs as potential biomarkers for HBV/HIV infected HCC.
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Biomarcadores Tumorais/genética , Carcinoma Hepatocelular/diagnóstico , MicroRNA Circulante/genética , Infecções por HIV/complicações , HIV-1/isolamento & purificação , Neoplasias Hepáticas/diagnóstico , MicroRNAs/genética , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/virologia , Estudos de Casos e Controles , Seguimentos , Perfilação da Expressão Gênica , Infecções por HIV/virologia , HIV-1/genética , Humanos , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/virologia , Prognóstico , Estudos Prospectivos , Curva ROCRESUMO
BACKGROUND/OBJECTIVES: Vitamin D and probiotics are nutrients of interest in the context of type 1 diabetes (T1D). We assessed the prevalence of and factors associated with vitamin D and probiotic supplementations among young children with genetic risk of T1D. SUBJECTS/METHODS: Use of supplements during the first 2 years of life was collected prospectively from 8674 children in The Environmental Determinants of Diabetes in the Young (TEDDY) study. RESULTS: Single and/or multivitamin/mineral (MVM) supplements were reported by 81% of the children. The majority of participants in Finland, Germany and Sweden (97-99%) and 50% in the United States received vitamin D supplements that were mostly MVMs. Probiotics use varied from 6% in the United States to 60% in Finland and was primarily from probiotics-only preparations. More than 80% of the vitamin D and probiotics supplementation was initiated during infancy, and more than half of the uses lasted longer than a year. Being the first child, longer duration of breastfeeding, born in a later year, older maternal age and higher maternal education level were associated with both vitamin D and probiotics use. Shorter gestational age and mother not smoking during pregnancy were associated with a higher likelihood of probiotics supplementation only. CONCLUSIONS: Vitamin D and probiotics supplementations are popular in children 0-2 years old and are associated with common factors. Data documented here will allow evaluation of the relationship between early childhood dietary intake and the development of islet autoimmunity and progression to T1D.
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Diabetes Mellitus Tipo 1/genética , Diabetes Mellitus Tipo 1/prevenção & controle , Suplementos Nutricionais , Predisposição Genética para Doença , Probióticos/administração & dosagem , Vitamina D/administração & dosagem , Adulto , Peso ao Nascer , Pré-Escolar , Diabetes Mellitus Tipo 1/sangue , Feminino , Finlândia , Alemanha , Humanos , Lactente , Masculino , Micronutrientes/administração & dosagem , Micronutrientes/sangue , Estudos Prospectivos , Fatores de Risco , Inquéritos e Questionários , Suécia , Estados Unidos , Vitamina D/sangue , Adulto JovemRESUMO
Nonmammalian vertebrates have the capacity of lifelong tooth replacement. In all vertebrates, tooth formation requires contact and interaction between the oral or pharyngeal epithelium and the underlying mesenchyme. To secure lifelong replacement, the presence of odontogenic stem cells has been postulated, particularly in the epithelial compartment. This study uses an advanced teleost fish species, the marine medaka Oryzias melastigma, a close relative to Oryzias latipes, to examine the expression and distribution of telomerase reverse transcriptase (Tert), the catalytic unit of telomerase, in developing pharyngeal teeth and to relate these data to the proliferative activity of the cells. The data are complemented by expression analysis of the pluripotency marker oct4 and bona fide stem cell marker lgr5. Tert distribution and tert expression in developing tooth germs show a dynamic spatiotemporal pattern. Tert is present first in the mesenchyme but is downregulated as the odontoblasts differentiate. In contrast, in the epithelial enamel organ, Tert is absent during early stages of tooth formation and upregulated first in ameloblasts. Later, Tert is expressed and immunolocalized throughout the entire inner enamel epithelium. The pattern of Tert distribution is largely mutually exclusive with that of proliferating cell nuclear antigen (PCNA) immunoreactivity: highly proliferative cells, as revealed by PCNA staining, are negative for Tert; conversely, PCNA-negative cells are Tert-positive. Only the early condensed mesenchyme is both Tert- and PCNA-positive. The absence of tert-positive cells in the epithelial compartment of early tooth germs is underscored by the absence of oct4- and lgr5-positive cells, suggesting ways other than stem cell involvement to secure continuous renewal.
Assuntos
Odontogênese/fisiologia , Oryzias , Faringe/enzimologia , Telomerase/metabolismo , Animais , Proteínas de Peixes/metabolismo , Técnicas Imunoenzimáticas , Hibridização In Situ , Fator 3 de Transcrição de Octâmero/metabolismo , Faringe/anatomia & histologia , Receptores Acoplados a Proteínas G/metabolismoRESUMO
Objective. To assess the face, content, and construct validity of the Voxel-Man TempoSurg Virtual Reality simulator. Participants and Methods. 74 ear, nose, and throat (ENT) surgeons participated. They were assigned to one of two groups according to their level of expertise: the expert group (n = 16) and the novice group (n = 58). The participants performed four temporal bone dissection tasks on the simulator. Performances were assessed by a global score and then compared to assess the construct validity of the simulator. Finally, the expert group assessed the face and content validity by means of a five-point Likert-type scale. Results. experienced surgeons performed better (p < .01) and faster (p < .001) than the novices. However, the groups did not differ in terms of bone volume removed (p = .11) or number of injuries (p = .37). 93.7% of experienced surgeons stated they would recommend this simulator for anatomical learning. Most (87.5%) also thought that it could be integrated into surgical training. Conclusion. The Voxel-Man TempoSurg Virtual Reality simulator constitutes an interesting complementary tool to traditional teaching methods for training in otologic surgery.
Assuntos
Apolipoproteína L1/genética , Doenças Cardiovasculares/genética , Diabetes Mellitus/genética , Hipertensão/genética , Insuficiência Renal Crônica/genética , Adulto , Alelos , Austrália , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Havaiano Nativo ou Outro Ilhéu do Pacífico/genética , Fatores de RiscoRESUMO
Thrombocytes express Toll-like receptor 4 and apparently use both mitogen-activated protein kinase (MAPK) and nuclear factor kappa-light-chain-enhancer of activated B cells (NFKB) pathways for nuclear signaling. However, it is not well known if the same enzyme systems found in mammalian cells are fully functional in chickens. Therefore, kinase inhibitors were used with thrombocytes to block kinases in lipopolysaccharide (LPS) stimulated cells to determine if interleukin (IL)-6 expression and production would be diminished. Results demonstrated that extracellular-signal-regulated kinase (ERK)1/2 and p38 MAPK pathways influence gene expression of IL-6 through treatment with either ERK or p38 MAPK inhibitor. In addition, thrombocyte lysates from cells treated with ERK, p38, mitogen-activated protein kinase kinase (MEK)1/2 and inhibitor of nuclear factor kappa-B kinase (IKK) inhibitor showed different levels of the phosphorylated form of ERK1/2, p38 and NFκB. Furthermore, IL-6 gene expression and production were significantly upregulated in LPS stimulated thrombocytes relative to all inhibitor-treated cells.