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1.
Public Health ; 230: 163-171, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38555685

RESUMO

OBJECTIVES: Immunisation against preventable diseases as meningitis is crucial from a public health perspective to face challenges posed by these infections. Nurses hold a great responsibility for these programs, which highlights the importance of understanding their preferences and needs to improve the success of campaigns. This study aimed to investigate nurses' preferences regarding Meningococcus A, C, W, and Y (MenACWY) conjugate vaccines commercialised in Spain. STUDY DESIGN: A national-level discrete choice experiment (DCE) was conducted. METHODS: A literature review and a focus group informed the DCE design. Six attributes were included: pharmaceutical form, coadministration evidence, shelf-life, package contents, single-doses per package, and package volume. Conditional logit models quantified preferences and relative importance (RI). RESULTS: Thirty experienced primary care nurses participated in this study. Evidence of coadministration with other vaccines was the most important attribute (RI = 43.78%), followed by package size (RI = 22.17%), pharmaceutical form (RI = 19.07%), and package content (RI = 11.80%). There was a preference for evidence of coadministration with routine vaccines (odds ratio [OR] = 2.579, 95% confidence interval [95%CI] = 2.210-3.002), smaller volumes (OR = 1.494, 95%CI = 1.264-1.767), liquid formulations (OR = 1.283, 95%CI = 1.108-1.486) and package contents including only vial/s (OR = 1.283, 95%CI = 1.108-1.486). No statistical evidence was found for the remaining attributes. CONCLUSIONS: Evidence of coadministration with routine vaccines, easy-to-store packages, and fully liquid formulations were drivers of nurses' preferences regarding MenACWY conjugate vaccines. These findings provide valuable insights for decision-makers to optimize current campaigns.


Assuntos
Vacinas Meningocócicas , Neisseria meningitidis , Enfermeiras e Enfermeiros , Humanos , Espanha , Vacinas Conjugadas , Comportamento de Escolha , Preparações Farmacêuticas
2.
Rev Esp Quimioter ; 37(2): 163-169, 2024 Apr.
Artigo em Espanhol | MEDLINE | ID: mdl-38372121

RESUMO

OBJECTIVE: Antimicrobial stewardship programs (ASP) have become a key tool in the adaptation of these drugs to the health system. The information available on the application and indicators used in these programs in emergency departments is scarce. The objective of this study is to know the extent of ASP implementation in the emergency departments, as well as the use of antimicrobials in these units. METHODS: Multicenter retrospective study. An invitation was sent to all participants of the REDFASTER-SEFH emergency pharmacist working group. A questionnaire was used consisting of 21 items, answered by a team made up of a pharmacist, emergency room specialist, infectious disease specialist and microbiologist. RESULTS: Eighteen hospitals completed the survey. Fourteen (77.8%) had an ASP manager. The DDD value per 1000 admissions ranged between 36.5 and 400.5 (median: 100.4 [IQR:57.2-157.3]). Both carbapenem and macrolide group presented wide variability in use. Six (33.3%) hospitals had an annual report on the specific resistance profile for urine and blood cultures. The percentage of multi-drug resistant strains in urine cultures was 12.5% and in blood cultures 12.2%. The percentage of adequacy in the bacteremia treatment was 81.0% (IQR:74.6-85.0%), while in urinary tract infections was 78.0% (IQR:71.5-88.0). CONCLUSIONS: Despite the existence of ASP members in emergency services, as well as the training activity and local guidelines is common. knowledge of the use of antimicrobials and resistances is limited. Future activities must be aimed at improving information about the ASP results in these units.


Assuntos
Anti-Infecciosos , Gestão de Antimicrobianos , Humanos , Estudos Retrospectivos , Anti-Infecciosos/uso terapêutico , Antibacterianos/uso terapêutico , Hospitais
3.
Actas Dermosifiliogr ; 114(7): 587-605, 2023.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-36806634

RESUMO

Quality indicators are crucial for standardizing and guaranteeing the quality of health care practices. The Spanish Academy of Dermatology and Venereology (AEDV) launched the CUDERMA Project to define quality indicators for the certification of specialized units in dermatology; the first 2areas selected were psoriasis and dermato-oncology. The aim of this study was to achieve consensus on what should be evaluated by these indicators using a structured process comprising a literature review and selection of an initial list of indicators to be evaluated in a Delphi consensus study following review by a multidisciplinary group of experts. The selected indicators were evaluated by a panel of 28 dermatologists and classified as either «essential¼ or «of excellence¼. The panel agreed on 84 indicators, which will be standardized and used to develop the certification standard for dermato-oncology units.


Assuntos
Dermatologia , Indicadores de Qualidade em Assistência à Saúde , Humanos , Técnica Delphi , Consenso , Certificação
4.
Actas Dermosifiliogr ; 114(10): 865-883, 2023.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-36796538

RESUMO

Defining quality indicators is a key strategy for ensuring the quality and standardization of health care. The CUDERMA project, an initiative of the Spanish Academy of Dermatology and Venerology (AEDV), was undertaken to define quality indicators for the certification of specialized units in dermatology; the first 2 areas selected were psoriasis and dermato-oncology. The aim of this study was to reach a consensus on what should be assessed by the indicators used to certify psoriasis units. The structured process used to do this comprised a literature review to identify potential indicators, the selection of an initial set of indicators to be evaluated by a multidisciplinary group of experts and, finally, a Delphi consensus study. A panel of 39 dermatologists evaluated the selected indicators and classified them as either "essential" or "of excellence". Consensus was finally reached on 67 indicators, which will be standardized and used to develop the certification standard for psoriasis units.


Assuntos
Psoríase , Indicadores de Qualidade em Assistência à Saúde , Humanos , Técnica Delphi , Psoríase/terapia
5.
PLoS One ; 18(2): e0279719, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36753491

RESUMO

Longitudinal evidence on the association between air pollution and blood pressure (BP) in adolescence is scarce. We explored this association in an ethnically diverse cohort of schoolchildren. Sex-stratified, linear random-effects modelling was used to examine how modelled residential exposure to annual average nitrogen dioxide (NO2), particulate matter (PM2.5, PM10) and ozone (O3), measures in µg/m3, associated with blood pressure. Estimates were based on 3,284 adolescents; 80% from ethnic minority groups, recruited from 51 schools, and followed up from 11-13 to 14-16 years old. Ethnic minorities were exposed to higher modelled annual average concentrations of pollution at residential postcode level than their White UK peers. A two-pollutant model (NO2 & PM2.5), adjusted for ethnicity, age, anthropometry, and pubertal status, highlighted associations with systolic, but not diastolic BP. A µg/m3 increase in NO2 was associated with a 0.30 mmHg (95% CI 0.18 to 0.40) decrease in systolic BP for girls and 0.19 mmHg (95% CI 0.07 to 0.31) decrease in systolic BP for boys. In contrast, a 1 µg/m3 increase in PM2.5 was associated with 1.34 mmHg (95% CI 0.85 to 1.82) increase in systolic BP for girls and 0.57 mmHg (95% CI 0.04 to 1.03) increase in systolic BP for boys. Associations did not vary by ethnicity, body size or socio-economic advantage. Associations were robust to adjustments for noise levels and lung function at 11-13 years. In summary, higher ambient levels of NO2 were associated with lower and PM2.5 with higher systolic BP across adolescence, with stronger associations for girls.


Assuntos
Poluentes Atmosféricos , Poluição do Ar , Ozônio , Masculino , Feminino , Humanos , Adolescente , Criança , Poluentes Atmosféricos/efeitos adversos , Poluentes Atmosféricos/análise , Pressão Sanguínea , Dióxido de Nitrogênio/análise , Londres , Etnicidade , Exposição Ambiental/efeitos adversos , Exposição Ambiental/análise , Grupos Minoritários , Poluição do Ar/efeitos adversos , Poluição do Ar/análise , Material Particulado/efeitos adversos , Material Particulado/análise , Ozônio/efeitos adversos , Ozônio/análise , Inglaterra/epidemiologia
6.
Ann Ig ; 35(2): 136-148, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-35603971

RESUMO

Aim: To explore the reasons for Italian midwives' decision to migrate, and their lived professional and emotional experiences. Methods: A descriptive phenomenological study was conducted recruiting Italian midwives who were working abroad in European countries. We offered a telephone or web interview. Two researchers conducted, audio-recorded, and fully transcribed the interviews and other two researchers, independently, performed a content analysis. Results: Thirty-two midwives having professional experiences in the UK, Ireland, Germany, Switzerland, and Spain were interviewed. Five themes emerged: 1) Education, 2) Migration decision-making, 3) Professional experience abroad, 4) Midwives' perceptions of their role, 5) Satisfaction versus desire to return. Our findings show a general dissatisfaction with Italian job opportunities in terms both of access to employment and work conditions. This scenario is complicated by the status of the professional midwifery in Italy. Conclusion: Stakeholders should ensure that the migration of Italian midwives is not synonymous with dispersion but is a channel of professional growth and mutual exchange.


Assuntos
Tocologia , Enfermeiros Obstétricos , Gravidez , Humanos , Feminino , Enfermeiros Obstétricos/psicologia , Pesquisa Qualitativa , Europa (Continente) , Itália
7.
Front Pediatr ; 10: 936780, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36483469

RESUMO

Background: Progressive osseous heteroplasia (POH) is an ultrarare genetic disorder characterized by an inactivating mutation in the GNAS gene that causes heterotopic ossification. Inhibition of the mammalian target of the rapamycin (mTOR) signalling pathway has been proposed as a therapy for progressive bone fibrodysplasia and non-genetic forms of bone heteroplasia. Herein, we describe the impact of using Everolimus as a rescue therapy for an identical twin girl exhibiting an aggressive clinical phenotype of POH. Methods: Clinical evaluation of the progression of the disease during Everolimus treatment was performed periodically. Cytokine markers involved in bone metabolism and protein markers related to bone activity were analyzed to explore bone turnover activity. Results: The patient received Everolimus therapy for 36 weeks. During treatment, no clinical improvement of the disease was perceived. Analysis of biochemical parameters, namely, ß-CTX (r 2 = -0.576, P-value = 0.016) and PNIP (r 2 = -0.598, P-value = 0.011), indicated that bone turnover activity was significantly reduced. Additionally, bone metabolism-related biomarkers showed only a significant positive correlation with PTH levels. Conclusions: Everolimus treatment did not modify the clinical progression of the disease in an aggressive form of POH, although an impact on the protein markers studied was observed.

8.
Transplant Proc ; 54(8): 2277-2284, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-36192211

RESUMO

The maximum expression of hemodynamic instability during liver transplant is the so-called postreperfusion syndrome (PRS) that increases both overall mortality and postoperative complications. It was first defined by Aggarwal et al in 1987, but the results are still conflicting when establishing the relationship between PRS and acute kidney failure (AKF). We conducted a retrospective observational study of transplant recipients with deceased-donor liver grafts between January 2002 and December 2018. We analyzed the incidence of PRS and its potential negative impact over kidney function. A total of 551 transplants were analyzed. PRS was recorded in 130 patients (23.6%). The incidence of AKF was 61.5%. A total of 111 patients required kidney replacement therapy (32.7%). Regarding the severity of AKF, 128 patients were classified as acute kidney injury (AKI) 1 (23.2%), 76 as AKI 2 (13.8%), and 135 as AKI 3 (24.5%). In the group with PRS, 75.4% (n = 98) developed AKF vs 57.2% (n = 241) in the group without PRS. In the multivariate analysis we found a relationship between PRS and AKF with an odds ratio of 2.18 (95% CI, 1.30-3.64; P = .003), once adjusted by the length of the anhepatic phase, donor age, Model for End-Stage Liver Disease score, history of ascites, and need for early surgical reintervention. The incidence of AKF decreased (44.5%) ever since the implementation of delayed calcineurin inhibitors therapy and piggyback surgical technique, but a clear influence of the occurrence of PRS on the development of AKF is still observed, with an OR of 3.78 (95% CI, 1.92-7.43; P < .001), once adjusted by albumin and hemoglobin levels, Model for End-Stage Liver Disease score, and Child classification.


Assuntos
Injúria Renal Aguda , Doença Hepática Terminal , Transplante de Fígado , Criança , Humanos , Transplante de Fígado/efeitos adversos , Estudos Retrospectivos , Doadores Vivos , Índice de Gravidade de Doença , Fatores de Risco , Injúria Renal Aguda/epidemiologia , Injúria Renal Aguda/etiologia , Síndrome
10.
Artigo em Inglês | MEDLINE | ID: mdl-35701317

RESUMO

Autoimmune encephalitis are brain inflammatory processes that are classified into two main groups according to the underlying pathogenic mechanism: antibodies to intracellular antigens (paraneoplastic) and antibodies to extracellular or neuronal surface antigens. The clinical manifestations of autoimmune encephalitis are very varied and non-specific. Complementary tests included in its clinical diagnosis include determination of antibodies in serum or cerebrospinal fluid and magnetic resonance imaging (MRI). MRI may show characteristic patterns such as mesial temporal involvement, although in some cases it may be normal or non-specific. 18F-Fluorodeoxyglucose PET/CT (18F-FDG PET/CT) imaging may be helpful in cases of paraneoplastic autoimmune encephalitis to find the primary tumor. In autoimmune encephalitis mediated by antibodies to extracellular antigens, 18F-FDG PET/CT shows distinctive patterns that can aid clinical diagnosis. This continuing education aims to present in a clear and easy-to-understand way, the clinical features of autoimmune encephalitis, the difficulties in clinical diagnosis and the patterns seen on MRI and 18F-FDG PET/CT.


Assuntos
Encefalite , Doença de Hashimoto , Anticorpos , Encefalite/diagnóstico por imagem , Fluordesoxiglucose F18 , Doença de Hashimoto/diagnóstico por imagem , Humanos , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada
12.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-32345572

RESUMO

The inclusion of 18F-FDG PET as a biomarker in the diagnostic criteria of neurodegenerative diseases and its indication in the presurgical assessment for drug-resistant epilepsies allow to improve specificity of these diagnosis. The traditional interpretation of neurological PET studies has been performed qualitatively, although in the last decade, several quantitative evaluation methods have emerged. This technical development has become relevant in clinical practice, improving specificity, reproducibility and reducing the interrater reliability derived from visual analysis. In this article we update/review the main imaging processing techniques currently used. This may allow the Nuclear Medicine physician to know their advantages and disadvantages when including these procedures in daily clinical practice.


Assuntos
Encefalopatias/diagnóstico por imagem , Fluordesoxiglucose F18 , Neuroimagem/métodos , Tomografia por Emissão de Pósitrons/métodos , Compostos Radiofarmacêuticos , Humanos
13.
Vaccine ; 37(25): 3362-3368, 2019 05 31.
Artigo em Inglês | MEDLINE | ID: mdl-31064673

RESUMO

There is a growing interest in the possible relationship between rotavirus (RV) vaccine and hospitalizations due to childhood seizures. We explored variation in hospitalization rates after 9 years of vaccination against pre-vaccination period for children <5 years of age from Galicia (Northwest Spain) before and after the introduction of the RV vaccines. Hospitalization rates for childhood seizures in Galician children were compared before and after RV vaccine introduction (in 2007) using different statistical approaches, including time series analyses. Our study cohort totaled 7,712 children <5 years of age admitted to hospital between 2002 and 2015 for "all kind of childhood seizures". Hospitalization rates decreases steadily with reductions ranging from 22.3% (95% CI: 15.0-29.1) in 2008, to 50.9% (95% CI: 45.5-55.7) in 2014, and significant results were also observed for <1, 1, and 2-year-old children in comparison with pre-vaccination period hospitalization rate. Regression models indicate a negative association between RV vaccination and hospitalizations for all kind of seizures. In addition, time series analyses are consistent with this finding and predict that vaccination coverage will affect hospitalization rates for "all kind of seizures" after 9 months. The results strongly support that RV vaccination has significantly reduced hospitalization rates due to childhood seizures.


Assuntos
Hospitalização/estatística & dados numéricos , Infecções por Rotavirus/prevenção & controle , Vacinas contra Rotavirus/administração & dosagem , Convulsões Febris/epidemiologia , Cobertura Vacinal/estatística & dados numéricos , Pré-Escolar , Feminino , Gastroenterite/prevenção & controle , Humanos , Lactente , Masculino , Estudos Retrospectivos , Rotavirus/imunologia , Infecções por Rotavirus/epidemiologia , Convulsões Febris/prevenção & controle , Espanha/epidemiologia
14.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-29776894

RESUMO

Alzheimer's disease (AD) is a neurodegenerative condition characterized by progressive cognitive decline and memory loss, and is the most common form of dementia. Amyloid plaques with neurofibrillary tangles are a neuropathological hallmark of AD that produces synaptic dysfunction and culminates later in neuronal loss. Amyloid PET is a useful, available and non-invasive technique that provides in vivo information about the cortical amyloid burden. In the latest revised criteria for the diagnosis of AD biomarkers were defined and integrated: pathological and diagnostic biomarkers (increased retention on fibrillar amyloid PET or decreased Aß1-42 and increased T-Tau or P-Tau in CSF) and neurodegeneration or topographical biomarkers (temporoparietal hypometabolism on 18F-FDG PET and temporal atrophy on MRI). Recently specific recommendations have been created as a consensus statement on the appropriate use of the imaging biomarkers, including amyloid PET: early-onset cognitive impairment/dementia, atypical forms of AD, mild cognitive impairment with early age of onset, and to differentiate between AD and other neurodegenerative diseases that occur with dementia. Amyloid PET is also contributing to the development of new therapies for AD, as well as in research studies for the study of other neurodegenerative diseases that occur with dementia where the deposition of Aß amyloid is involved in its pathogenesis. In this paper, we review some general concepts and study the use of amyloid PET in depth and its relationship with neurodegenerative diseases and other diagnostic techniques.


Assuntos
Doença de Alzheimer/diagnóstico por imagem , Tomografia por Emissão de Pósitrons , Peptídeos beta-Amiloides , Humanos , Tomografia por Emissão de Pósitrons/métodos , Guias de Prática Clínica como Assunto
15.
Interv Neuroradiol ; 24(4): 392-397, 2018 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-29697301

RESUMO

Introduction Proximal cervical internal carotid artery stenosis greater than 50% merits revascularization to mitigate the risk of stroke recurrence among large-vessel anterior circulation strokes undergoing mechanical thrombectomy. Carotid artery stenting necessitates the use of antiplatelets, and there is a theoretical increased risk of hemorrhagic transformation given that such patients may already have received intravenous thrombolytics and have a significant infarct burden. We investigate the outcomes of large-vessel anterior circulation stroke patients treated with intravenous thrombolytics receiving same-day carotid stenting or selective angioplasty compared to no carotid intervention. Materials and methods The study cohort was obtained from the National (Nationwide) Inpatient Sample database between 2006 and 2014, using International Statistical Classification of Diseases, ninth revision discharge diagnosis and procedure codes. A total of 11,825 patients with large-vessel anterior circulation stroke treated with intravenous thrombolytic and mechanical thrombectomy on the same day were identified. The study population was subdivided into three subgroups: no carotid intervention, same-day carotid angioplasty without carotid stenting, and same-day carotid stenting. Outcomes were assessed with respect to mortality, significant disability at discharge, hemorrhagic transformation, and requirement of percutaneous endoscopic gastronomy tube placement, prolonged mechanical ventilation, or craniotomy. Results This study found no statistically significant difference in patient outcomes in those treated with concurrent carotid stenting compared to no carotid intervention in terms of morbidity or mortality. Conclusions If indicated, it is reasonable to consider concurrent carotid stenting and/or angioplasty for large-vessel anterior circulation stroke patients treated with mechanical thrombectomy who also receive intravenous thrombolytics.


Assuntos
Angioplastia/métodos , Estenose das Carótidas/terapia , Fibrinolíticos/uso terapêutico , Stents , Acidente Vascular Cerebral/terapia , Trombectomia/métodos , Idoso , Terapia Combinada , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Resultado do Tratamento
16.
Transplant Proc ; 50(1): 184-191, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29407306

RESUMO

BACKGROUND: There are increasingly more patients awaiting liver transplantation while the number of donors has remained stable. It has been proven that grafts from donors older than 60 years have comparable results with those from younger donors. It is unclear whether this is so with donors older than 80 years old. MATERIAL AND METHODS: This was a retrospective study of all adult liver transplantations at our institution between March 2011 and December 2015. We compared 1-, 3-, 6-, and 12-month graft survival rates from donors <80 years and ≥80 years. We also compared postoperative complications: infections, acute kidney injury, need for readmission in the intensive care unit, length of stay, mechanical ventilation, and specific graft complications. We considered differences in each age group regarding the presence of hepatitis C virus (HCV). RESULTS: Of 177 recipients, 38 received grafts from octogenarian donors (21.5%). Survival rates were very similar in the groups (97%, 93%, 91%, and 87% for donors <80 years and 95%, 92%, 87%, and 76% for donors ≥80 years). Although for younger grafts, 1-year survival rates were slightly lower for HCV+ patients (80% vs 89%; log-rank 0.205), this difference does not exist for elderly donors. The incidence of postoperative complications was similar in both groups. CONCLUSIONS: Livers from octogenarian donors are acceptable for liver transplantation provided that thorough assessment and selection is made by avoiding other known poor prognosis factors. The presence of HCV did not affect survival rates.


Assuntos
Idoso de 80 Anos ou mais , Seleção do Doador/métodos , Transplante de Fígado/métodos , Complicações Pós-Operatórias/epidemiologia , Doadores de Tecidos/estatística & dados numéricos , Adulto , Fatores Etários , Idoso , Feminino , Sobrevivência de Enxerto , Humanos , Incidência , Transplante de Fígado/efeitos adversos , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias/etiologia , Estudos Retrospectivos , Taxa de Sobrevida , Resultado do Tratamento
17.
J Neural Eng ; 15(1): 016009, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-28914232

RESUMO

OBJECTIVE: Combining repetitive transcranial magnetic stimulation (rTMS) with brain-computer interface (BCI) training can address motor impairment after stroke by down-regulating exaggerated inhibition from the contralesional hemisphere and encouraging ipsilesional activation. The objective was to evaluate the efficacy of combined rTMS + BCI, compared to sham rTMS + BCI, on motor recovery after stroke in subjects with lasting motor paresis. APPROACH: Three stroke subjects approximately one year post-stroke participated in three weeks of combined rTMS (real or sham) and BCI, followed by three weeks of BCI alone. Behavioral and electrophysiological differences were evaluated at baseline, after three weeks, and after six weeks of treatment. MAIN RESULTS: Motor improvements were observed in both real rTMS + BCI and sham groups, but only the former showed significant alterations in inter-hemispheric inhibition in the desired direction and increased relative ipsilesional cortical activation from fMRI. In addition, significant improvements in BCI performance over time and adequate control of the virtual reality BCI paradigm were observed only in the former group. SIGNIFICANCE: When combined, the results highlight the feasibility and efficacy of combined rTMS + BCI for motor recovery, demonstrated by increased ipsilesional motor activity and improvements in behavioral function for the real rTMS + BCI condition in particular. Our findings also demonstrate the utility of BCI training alone, as shown by behavioral improvements for the sham rTMS + BCI condition. This study is the first to evaluate combined rTMS and BCI training for motor rehabilitation and provides a foundation for continued work to evaluate the potential of both rTMS and virtual reality BCI training for motor recovery after stroke.


Assuntos
Interfaces Cérebro-Computador , Córtex Motor/fisiologia , Reabilitação do Acidente Vascular Cerebral/métodos , Acidente Vascular Cerebral/terapia , Estimulação Magnética Transcraniana/métodos , Terapia de Exposição à Realidade Virtual/métodos , Adulto , Idoso , Terapia Combinada , Feminino , Humanos , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade , Recuperação de Função Fisiológica/fisiologia , Acidente Vascular Cerebral/diagnóstico , Acidente Vascular Cerebral/fisiopatologia
18.
BMC Infect Dis ; 17(1): 370, 2017 05 30.
Artigo em Inglês | MEDLINE | ID: mdl-28558652

RESUMO

BACKGROUND: The IFI27 interferon gene expression has been found to be largely increased in rotavirus (RV)-infected patients. IFI27 gene encodes for a protein of unknown function, very recently linked to epidermal proliferation and related to the epidermal growth factor (EGF) protein. The EGF is a low-molecular-weight polypeptide that is mainly produced by submandibular and parotid glands, and it plays an important physiological role in the maintenance of oro-esophageal and gastric tissue integrity. Our aim was to determine salivary EGF levels in RV-infected patients in order to establish its potential relationship with IFI27 increased expression and EGF-mediated mucosal protection in RV infection. METHODS: We conducted a prospective comparative study using saliva samples from 27 infants infected with RV (sampled at recruitment during hospital admission and at convalescence, i.e. at least 3 months after recovery) and from 36 healthy control children. RESULTS: Median (SD) EGF salivary concentration was 777 (529) pg/ml in RV-infected group at acute phase and 356 (242) pg/m at convalescence, while it was 337 (119) pg/ml in the healthy control group. A significant association was found between EGF levels and hospitalization length of stay (P-value = 0.022; r2 = -0.63). CONCLUSIONS: The salivary levels of EGF are significantly increased during the acute phase of natural RV infection, and relate to length of hospitalization. Further assessment of this non-invasive biomarker in RV disease is warranted.


Assuntos
Fator de Crescimento Epidérmico/metabolismo , Tempo de Internação , Infecções por Rotavirus/metabolismo , Saliva/metabolismo , Biomarcadores/metabolismo , Estudos de Casos e Controles , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Estudos Prospectivos , Saliva/virologia
20.
ACS Appl Mater Interfaces ; 8(49): 34068-34079, 2016 Dec 14.
Artigo em Inglês | MEDLINE | ID: mdl-27960394

RESUMO

Traditional polyetherimides (PEIs) are commonly synthesized from an aromatic diamine and an aromatic dianhydride (e.g., 3,4'-oxidianiline (ODA) and 4,4'-oxidiphtalic anhydride (ODPA)) leading to the imide linkage and outstanding chemical, thermal and mechanical properties yet lacking any self-healing functionality. In this work, we have replaced the traditional aromatic diamine by a branched aliphatic fatty dimer diamine (DD1). This led to a whole family of self-healing polymers not containing reversible chemical bonds, capable of healing at (near) room temperature yet maintaining very high elastomeric-like mechanical properties (up to 6 MPa stress and 570% strain at break). In this work, we present the effect of the DD1/ODPA ratio on the general performance and healing behavior of a room temperature healing polyetherimide. A dedicated analysis suggests that healing proceeds in three steps: (i) an initial adhesive step leading to the formation of a relatively weak interface; (ii) a second step at long healing times leading to the formation of an interphase with different properties than the bulk material and (iii) disappearance of the damaged zone leading to full healing. We argue that the fast interfacial adhesive step is due to van der Waals interactions of long dangling alkyl chains followed by an interphase formation due to polymer chain interdiffusion. An increase in DD1/ODPA ratio leads to an increase in the healing kinetics and displacement shift of the first healing step toward lower temperatures. An excess of DD1 leads to the cross-linking of the polymer thereby restricting the necessary mobility for the interphase formation and limiting the self-healing behavior. The results here presented offer a new route for the development of room temperature self-healing thermoplastic elastomers with improved mechanical properties using fatty dimer diamines.

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