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1.
Am J Otolaryngol ; 45(3): 104243, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38442460

RESUMO

PURPOSE: To compare human papillomavirus (HPV) testing, prevalence, and association with prognosis between head and neck squamous cell carcinoma (HNSCC) subsites. MATERIALS AND METHODS: This study utilized the National Cancer Database (NCDB) to identify patients diagnosed with HNSCC between 2010 and 2017. Rates of HPV testing, HPV-positivity, and changes in these rates over time were measured by subsite. The impact of HPV-positivity on overall survival across six head and neck subsites was assessed using multivariable-adjusted Cox proportional hazards analysis. RESULTS: A total of 121,550 patients were included. Of this cohort, 87,575 (72.1%) were tested for HPV, with the oropharynx (55,049/64,158; 85.8%) displaying the highest rates of testing and the sinonasal tract (1519/2853; 53.2%) displaying the lowest testing rates. Of the 86,136 with a definitive result, 46,878 (54.4%) were HPV-positive, with the oropharynx (40,313/54,205; 74.4%) displaying the highest rates of HPV-positivity and the oral cavity (1818/11,505; 15.8%) displaying the lowest. HPV-positive malignancy was associated with significantly improved adjusted overall survival in the oropharynx (HR = 0.42 [95% CI: 0.43-0.47]), oral cavity (HR = 0.86 [95% CI: 0.79-0.95]), sinonasal tract (HR = 0.63 [95% CI: 0.48-0.83]), larynx (HR = 0.78 [95% CI: 0.71-0.87]), and hypopharynx (HR = 0.56 [95% CI: 0.48-0.66]), but not the nasopharynx (HR = 0.93 [95% CI: 0.77-1.14]). CONCLUSION: HPV testing rates were significantly lower in non-oropharyngeal subsites. This is relevant as HPV-associated disease displayed significantly improved overall survival in both the oropharynx and four of five non-oropharyngeal subsites. While validation with prospective studies is necessary, these findings may warrant HPV testing in all HNSCC subsites.


Assuntos
Bases de Dados Factuais , Neoplasias de Cabeça e Pescoço , Infecções por Papillomavirus , Carcinoma de Células Escamosas de Cabeça e Pescoço , Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Prognóstico , Idoso , Carcinoma de Células Escamosas de Cabeça e Pescoço/virologia , Carcinoma de Células Escamosas de Cabeça e Pescoço/mortalidade , Carcinoma de Células Escamosas de Cabeça e Pescoço/epidemiologia , Carcinoma de Células Escamosas de Cabeça e Pescoço/diagnóstico , Prevalência , Infecções por Papillomavirus/epidemiologia , Infecções por Papillomavirus/diagnóstico , Infecções por Papillomavirus/virologia , Neoplasias de Cabeça e Pescoço/virologia , Neoplasias de Cabeça e Pescoço/epidemiologia , Neoplasias de Cabeça e Pescoço/mortalidade , Neoplasias de Cabeça e Pescoço/diagnóstico , Papillomaviridae/isolamento & purificação , Estados Unidos/epidemiologia , Adulto , Taxa de Sobrevida , Papillomavirus Humano
2.
Eur Phys J A Hadron Nucl ; 59(11): 253, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37927902

RESUMO

We present the complete next-to-next-to-leading order (NNLO) pure pointlike QED corrections to lepton-proton scattering, including three-photon-exchange contributions, and investigate their impact in the case of the MUSE experiment. These corrections are computed with no approximation regarding the energy of the emitted photons and taking into account lepton-mass effects. We contrast the NNLO QED corrections to known next-to-leading order corrections, where we include the elastic two-photon exchange (TPE) through a simple hadronic model calculation with a dipole ansatz for the proton electromagnetic form factors. We show that, in the low-momentum-transfer region accessed by the MUSE experiment, the improvement due to more sophisticated treatments of the TPE, including inelastic TPE, is of similar if not smaller size than some of the NNLO QED corrections. Hence, the latter have to be included in a precision determination of the low-energy proton structure from scattering data, in particular for electron-proton scattering. For muon-proton scattering, the NNLO QED corrections are considerably smaller.

3.
Am J Physiol Cell Physiol ; 318(2): C360-C371, 2020 02 01.
Artigo em Inglês | MEDLINE | ID: mdl-31774700

RESUMO

Nerve growth factor (NGF) is recognized as a pleiotropic molecule, exerting a variety of biological effects on different cell types and pathophysiological conditions, and its role in tissue wound healing has been recently highlighted. However, the preferential cellular target of NGF is still elusive in the complex cellular and molecular cross talk that accompanies wound healing. Thus, to explore possible NGF cellular targets in skin wound healing, we investigated the in vitro NGF responsiveness of keratinocytes (cell line HEKa), fibroblasts (cell line BJ), and endothelial cells (cell line HUVEC), also in the presence of adverse microenvironmental conditions, e.g., hyperglycemia. The main results are summarized as follows: 1) NGF stimulates keratinocyte proliferation and HUVEC proliferation and angiogenesis in a dose-dependent manner although it has no effect on fibroblast proliferation; 2) NGF stimulates keratinocyte but not fibroblast migration in the wound healing assay; and 3) NGF completely reverts the proliferation impairment of keratinocytes and the angiogenesis impairment of HUVECs induced by high d-glucose concentration in the culture medium. These results contribute to better understanding possible targets for the therapeutic use of NGF in skin repair.


Assuntos
Células Endoteliais/metabolismo , Fibroblastos/metabolismo , Queratinócitos/metabolismo , Fator de Crescimento Neural/metabolismo , Cicatrização/fisiologia , Animais , Linhagem Celular , Movimento Celular/fisiologia , Proliferação de Células/fisiologia , Células Endoteliais da Veia Umbilical Humana , Humanos , Masculino , Camundongos , Camundongos Endogâmicos ICR , Pele/metabolismo
4.
Am J Otolaryngol ; 41(5): 102552, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32505990

RESUMO

BACKGROUND: Salivary fistulas remain a significant problem in patients undergoing major head and neck reconstructive surgery. Surgical sealants have become increasingly used in cutaneous and non-cutaneous wound closure, providing a barrier to fluids/gases and promoting healing. The purpose of this study was to determine the efficacy of a common surgical sealant, 2-Octyl Cyanoacrylate (2-OCA, Dermabond®), in the prevention of salivary fistulas following free flap reconstruction of the oral cavity. METHODS: In this non-randomized, single arm prospective trial, patients undergoing free flap reconstruction of gravity-dependent oral cavity defects were recruited. Application of 2-OCA was performed along flap inset suture lines at the time of surgery. Prospectively collected trial data were propensity score matched to a control cohort to compare outcomes. Data collected include demographics, medical co-morbidities, previous treatments, primary tumor site, and subsites reconstructed. The primary outcome measure was rate of salivary fistula formation. Secondary outcomes were time to development of leak and percentage of patients tolerating oral feeding at one month post-operatively. RESULTS: In the 46 propensity score matched pairs, eight (17.4%) out of 46 patients in the 2-OCA prospective cohort and seven (15.2%) out of 46 patients in the control cohort developed postoperative salivary fistulas within the one-month study interval (p = 1.00). The average time to postoperative leak in the 2-OCA group was 12.5 days versus 7.1 days in the control cohort (p = 0.10). In the 2-OCA group, 30 (65.2%) patients were tolerating regular diet at one month post-operatively compared to 33 (71.7%) in the control cohort (p = 0.65). CONCLUSION: Salivary fistula rates after application of a 2-OCA surgical sealant were not improved compared to a control cohort in this single institutional trial. There are several surgical sealants available, each with varying elasticity and adhesiveness. Future studies are needed to identify surgical sealants that are able to provide sufficient strength and adhesion to seal closures and combat corrosive saliva, but elastic enough to handle motion related tension during swallowing and post-operative movements in the head and neck.


Assuntos
Cianoacrilatos/administração & dosagem , Retalhos de Tecido Biológico , Boca/cirurgia , Resultados Negativos , Procedimentos Cirúrgicos Bucais/métodos , Procedimentos de Cirurgia Plástica/métodos , Complicações Pós-Operatórias/prevenção & controle , Fístula das Glândulas Salivares/prevenção & controle , Adesivos Teciduais/administração & dosagem , Idoso , Estudos de Coortes , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos
5.
Am J Otolaryngol ; 40(3): 377-381, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30853084

RESUMO

OBJECTIVE: Evaluate the epidemiologic makeup of a population of HPV+ OPSCC patients treated at one institution over approximately a decade. STUDY DESIGN: Prospective survey study of HPV+ OPSCC treated between 2007 and 2016. SETTING: Mount Sinai Health System SUBJECTS AND METHODS: Patients aged 18+ who underwent treatment for HPV+ OPSCC. 223 patients were asked to complete a health survey including substance use and sexual history in order to specifically characterize the social behaviors of patients with HPV + OPSCC. RESULTS: Eighty-two patients responded, 70 male (85.4%) and 12 female (14.6%). While half of patients were nonsmokers, 18.3% had a smoking history of <15 pack years, and 32.9% had a 15+ pack-year smoking history. Nearly 25% reported significant drinking history (3+ drinks/day). Males had an average of 18 lifetime sexual partners, and females had 7 partners. Eight patients reported >100 sexual partners. CONCLUSIONS: HPV+ OPSCC was more prevalent in white males with a high number of lifetime sexual partners, as expected. Careful evaluation revealed other findings of significance that are not generally associated with this population. Half of our patients had significant historical tobacco and alcohol consumption. One quarter of patients had a history of another malignancy. These findings highlight the importance of taking a comprehensive history when determining appropriate treatment or designing future de-escalation trials in HPV+ OPSCC.


Assuntos
Neoplasias Orofaríngeas/complicações , Neoplasias Orofaríngeas/epidemiologia , Infecções por Papillomavirus/complicações , Infecções por Papillomavirus/epidemiologia , Comportamento Sexual , Comportamento Social , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Consumo de Bebidas Alcoólicas , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias Orofaríngeas/psicologia , Infecções por Papillomavirus/psicologia , Prevalência , Estudos Prospectivos , Fumar , Adulto Jovem
6.
J Foot Ankle Surg ; 58(1): 109-113, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30448379

RESUMO

Rigid flatfoot deformity is a debilitating condition that can be managed by triple arthrodesis surgery. Triple arthrodesis has the potential to restore health-related quality of life, but it is also associated with several complications. Few studies have examined the 30-day readmission rates after triple arthrodesis. The objective of this study was to investigate risk factors for 30-day all-cause readmissions after triple arthrodesis. The nationwide readmission database was queried from 2013. By using International Classification of Disease, Ninth Revision, procedure codes, all triple arthrodesis procedures were identified. Demographic factors, comorbidities, insurance status, and hospital characteristics were statistically compared between patients who experienced a 30-day readmission and those who did not. Multivariable logistic regression was used to identify independent risk factors for 30-day readmission. Overall, 1916 triple arthrodesis cases were identified. The overall 30-day readmission rate after triple arthrodesis was 4.6%. Univariate analysis revealed a statistically higher proportion of patients with electrolyte abnormalities (13.8% vs 4.6%; p < .01) in the patients who were readmitted within 30 days compared with those who were not. Multivariable analysis demonstrated Medicaid insurance, relative to private insurance, as the only statistically significant predictor of 30-day readmission with an odds ratio of 4.43 (p < .05). These results suggest that patients of lower socioeconomic status may be at a greater risk for development of a short-term readmission after triple arthrodesis surgery. These findings are important for surgeon and patient communication, counseling, and postoperative care when choosing to pursue triple arthrodesis surgery.


Assuntos
Artrodese/efeitos adversos , Pé Chato/cirurgia , Readmissão do Paciente/estatística & dados numéricos , Complicações Pós-Operatórias/epidemiologia , Adulto , Idoso , Artrodese/estatística & dados numéricos , Bases de Dados Factuais , Feminino , Humanos , Modelos Logísticos , Masculino , Medicaid , Pessoa de Meia-Idade , Razão de Chances , Estudos Retrospectivos , Fatores de Risco , Fatores Socioeconômicos , Estados Unidos
7.
J Foot Ankle Surg ; 58(3): 410-416, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30803914

RESUMO

Ankle fractures are common orthopedic injuries with favorable outcomes when managed with open reduction and internal fixation (ORIF). Several patient-related risk factors may contribute to poor short-term outcomes, and machine learning may be a valuable tool for predicting outcomes. The objective of this study was to evaluate machine-learning algorithms for accurately predicting short-term outcomes after ORIF for ankle fractures. The Nationwide Inpatient Sample and Nationwide Readmissions Database were queried for adult patients ≥18 years old who underwent ORIF of an ankle fracture during 2013 or 2014. Morbidity and mortality, length of stay >3 days, and 30-day all-cause readmission were the outcomes of interest. Two machine-learning models were created to identify patient and hospital characteristics associated with the 3 outcomes. The machine learning models were evaluated using confusion matrices and receiver operating characteristic area under the curve values. A total of 16,501 cases were drawn from the Nationwide Inpatient Sample and used to assess morbidity and mortality and length of stay >3 days, and 33,504 cases were drawn from the Nationwide Readmissions Database to assess 30-day readmission. Older age, Medicaid, Medicare, deficiency anemia, congestive heart failure, chronic lung disease, diabetes, hypertension, and renal failure were the variables associated with a statistically significant increased risk of developing all 3 adverse events. Logistic regression and gradient boosting had similar area under the curve values for each outcome, but gradient boosting was more accurate and more specific for predicting each outcome. Our results suggest that several comorbidities may be associated with adverse short-term outcomes after ORIF of ankle fractures, and that machine learning can accurately predict these outcomes.


Assuntos
Fraturas do Tornozelo/cirurgia , Fixação Interna de Fraturas , Mortalidade Hospitalar , Tempo de Internação/estatística & dados numéricos , Aprendizado de Máquina , Redução Aberta , Complicações Pós-Operatórias/epidemiologia , Fatores Etários , Algoritmos , Anemia/epidemiologia , Fraturas do Tornozelo/epidemiologia , Estudos Transversais , Bases de Dados Factuais , Diabetes Mellitus/epidemiologia , Feminino , Insuficiência Cardíaca/epidemiologia , Humanos , Hipertensão/epidemiologia , Pneumopatias/epidemiologia , Masculino , Medicaid , Medicare , Pessoa de Meia-Idade , Insuficiência Renal/epidemiologia , Fatores de Risco , Estados Unidos/epidemiologia
8.
Foot Ankle Surg ; 25(3): 327-331, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-29409171

RESUMO

BACKGROUND: End-stage ankle arthritis is a debilitating condition that negatively impacts patient quality of life. Tibiotalar fusion and total ankle replacement are treatment options for managing ankle arthritis. Few studies have examined short term readmission rates of these two procedures. The objective of this study was compare all-cause 30-day readmission rates between patients undergoing tibiotalar fusion vs. total ankle replacement. METHODS: This study queried the Nationwide Readmission Database (NRD) from 2013-2014 and used international classification of disease, 9th revision (ICD-9) procedure codes to identify all patients who underwent a tibiotalar fusion or a total ankle replacement. Comorbidities, insurance status, hospital characteristics, and readmission rates were statistically compared between the two cohorts. Risk factors were then identified for 30-day readmission. RESULTS: A total of 5660 patients were analyzed with 2667 in the tibiotalar fusion cohort and 2993 in the total ankle replacement cohort. Univariate analysis revealed that the readmission rate after tibiotalar fusion (4.4%) was statistically greater than after total ankle replacement (1.4%). Multivariable regression analysis indicated that deficiency anemia (OR 2.18), coagulopathy (OR 3.51), renal failure (OR 2.83), other insurance relative to private (OR 3.40), and tibiotalar fusion (OR 2.51) were all statistically significant independent risk factors for having a readmission within 30-days. CONCLUSIONS: These findings suggest that during the short-term period following discharge from the hospital, patients who received a tibiotalar fusion are more likely to experience a 30-day readmission. These findings are important for decision making when a surgeon encounters a patient with end stage ankle arthritis. LEVEL OF EVIDENCE: Level III, cohort study.


Assuntos
Articulação do Tornozelo/cirurgia , Artrodese , Artroplastia de Substituição do Tornozelo , Readmissão do Paciente/estatística & dados numéricos , Idoso , Anemia/epidemiologia , Artrite/cirurgia , Estudos de Coortes , Coagulação Intravascular Disseminada/epidemiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Insuficiência Renal/epidemiologia , Fatores de Risco , Estados Unidos/epidemiologia
9.
Blood Cells Mol Dis ; 68: 203-208, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-28274788

RESUMO

Gaucher Disease type 1 (GD1) is a lysosomal disorder that affects many systems. Therapy improves the principal manifestations of the condition and, as a consequence, many patients show a modified phenotype which reflects manifestations of their disease that are refractory to treatment. More generally, it is increasingly recognised that information as to how a patient feels and functions [obtained by patient- reported outcome measurements (PROMs)] is critical to any comprehensive evaluation of treatment. A new set of management goals for GD1 in which both trends are reflected is needed. To this end, a modified Delphi procedure among 25 experts was performed. Based on a literature review and with input from patients, 65 potential goals were formulated as statements. Consensus was considered to be reached when ≥75% of the participants agreed to include that specific statement in the management goals. There was agreement on 42 statements. In addition to the traditional goals concerning haematological, visceral and bone manifestations, improvement in quality of life, fatigue and social participation, as well as early detection of long-term complications or associated diseases were included. When applying this set of goals in medical practice, the clinical status of the individual patient should be taken into account.


Assuntos
Doença de Gaucher/complicações , Doença de Gaucher/terapia , Qualidade de Vida , Consenso , Gerenciamento Clínico , Europa (Continente)/epidemiologia , Doença de Gaucher/epidemiologia , Doença de Gaucher/psicologia , Humanos
10.
Clin Genet ; 93(3): 671-674, 2018 03.
Artigo em Inglês | MEDLINE | ID: mdl-28892125

RESUMO

Beukes hip dysplasia is an autosomal dominant disease which has to date been described only in a large South African family of Dutch origin. The patients presented with progressive epiphyseal dysplasia limited to femoral capital epiphysis and their height was not significantly reduced. A unique variant of the ubiquitin-fold modifier 1 (Ufm1)-specific peptidase 2 (UFSP2) gene (c.868T>C) has been reported in all individuals from Beukes family with clinical and radiological diagnosis of Beukes hip dysplasia. Three individuals, propositus, mother, and grandmother, presented with short stature, joint pain, genu vara and a novel spondyloepimetaphyseal dysplasia involving epiphyses predominantly at hips, but also at knees, ankles, wrists and hands, associated with variable degrees of metaphysis and spine involvement. Exome sequencing allowed us to identify the heterozygous variant c.1277A>C of the UFSP2 gene, leading to the missense change p.D426A, in all 3 patients. This mutation is predicted as damaging and, similarly to the mutation originally described in the Beukes family (p. Y290H), directly affects one of the catalytic residues participating in the active site of the protein. This supports the novel notion that loss of catalytic UFSP2 activity, observed in association with different mutants and already experimentally proven in vitro, may have different clinical outcomes.


Assuntos
Cisteína Endopeptidases/genética , Mutação , Osteocondrodisplasias/diagnóstico , Osteocondrodisplasias/genética , Sequência de Aminoácidos , Pré-Escolar , Feminino , Estudos de Associação Genética , Humanos , Linhagem , Fenótipo , Radiografia , Análise de Sequência de DNA , Sequenciamento do Exoma
11.
J Chem Phys ; 149(13): 134313, 2018 Oct 07.
Artigo em Inglês | MEDLINE | ID: mdl-30292205

RESUMO

Spectra reflecting the formation of single-site double-core-hole pre-edge states involving the N 1s and C 1s core levels of acetonitrile have been recorded by means of high-resolution single-channel photoelectron spectroscopy using hard X-ray excitation. The data are interpreted with the aid of ab initio quantum chemical calculations, which take into account the direct or conjugate nature of this type of electronic states. Furthermore, the photoelectron spectra of N 1s and C 1s singly core-ionized states have been measured. From these spectra, the chemical shift between the two C 1s-1 states is estimated. Finally, by utilizing C 1s single and double core-ionization potentials, initial and final state effects for the two inequivalent carbon atoms have been investigated.

12.
Minerva Pediatr ; 69(2): 87-94, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25502734

RESUMO

BACKGROUND: The aim of this study was to highlight how many psychopathological disorders emerging during adolescence are not easily detectable and interpretable. METHODS: We investigated the social, emotional and demographic factors related to psychopathological distress, measuring the overall functioning of the child/adolescent and the consequent impact on academic and social functioning, along with its implications on the emergence of feelings of discomfort and anxiety. RESULTS: Many psychopathological disorders are easily detectable and diagnosable in this particular stage of life, and although they are rooted in adolescent distress, they can generate real psychiatric disorders. CONCLUSIONS: The data emerging from clinical practice stress the need for a comprehensive in order to identify possible subclinical symptoms for onset of mental illness, so as to be able to implement more targeted and less invasive therapeutic strategies.


Assuntos
Ansiedade/epidemiologia , Transtornos Mentais/epidemiologia , Estresse Psicológico/epidemiologia , Adolescente , Ansiedade/diagnóstico , Criança , Feminino , Humanos , Masculino , Transtornos Mentais/diagnóstico , Transtornos Mentais/fisiopatologia , Estresse Psicológico/diagnóstico
13.
Eur J Clin Microbiol Infect Dis ; 35(9): 1531-9, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27272120

RESUMO

The purpose of this study was to assess the main clinical predictors and microbiological features of ventilator-associated pneumonia (VAP) in the Intensive Care Unit (ICU) environment. This work is a retrospective analysis over one year from September 2010 to September 2011. Patients' risk factors, causes of admission, comorbidities and respiratory specimens collected in six Italian ICUs were reviewed. Incidence and case fatality rate of VAP were evaluated. After stratification for VAP development, univariate and multivariate analyses were performed to assess the impact of patients' conditions on the onset of this infection. A total of 1,647 ICU patients (pts) were considered. Overall, 115 patients (6.9 %) experienced at least one episode of VAP. The incidence rate for VAP was 5.82/1,000 pts-days, with a case fatality rate of 44.3 %. Multivariate analysis showed that admission for neurological disorders (aIRR 4.12, CI 1.24-13.68, p = 0.02) and emergency referral to ICU from other hospitals (aIRR 2.11, CI 1.03-4.31, p = 0.04) were associated with higher risk of VAP, whereas a tendency to a higher risk of infection was detected for admission due to respiratory disease, cardiac disease, trauma and for having obesity or renal failure. A total of 372 microbiological isolates from respiratory specimens were collected in VAP patients. The most common species were Klebsiella pneumoniae, Acinetobacter baumannii and Pseudomonas aeruginosa, showing high resistance rates to carbapenems. Neurological disorders and emergency referral at the admission into the ICU are significantly associated with the onset of VAP. A high incidence of multi-drug resistant Gram- species was detected in the respiratory specimens.


Assuntos
Bactérias/classificação , Bactérias/isolamento & purificação , Candida/isolamento & purificação , Pneumonia Associada à Ventilação Mecânica/epidemiologia , Pneumonia Associada à Ventilação Mecânica/microbiologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Hospitais , Humanos , Incidência , Unidades de Terapia Intensiva , Itália/epidemiologia , Masculino , Pessoa de Meia-Idade , Mortalidade , Pneumonia Associada à Ventilação Mecânica/patologia , Estudos Retrospectivos , Fatores de Risco
14.
Minerva Pediatr ; 68(2): 148-51, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-27002489

RESUMO

A reorganization of the brain occurs in adolescence and it is documented by neuroimaging, neurophysiology and pathology of development. The high levels of neural plasticity allow the intellectual and emotional development during adolescence, a transition period of life full of physical and psychological changes. However, potentially dangerous agents could be the genesis of psychopathology of the adult and mental illness or distress. Adolescence is a crucial phase for the maturation of the brain. Therefore, future research should study how the environment affects and influences the function and the organization of the brain. Teenagers look for new experiences and strong emotions, sometimes endangering their health. Neuroscientific explanations have been proposed for the typical teenagers' behavior. In the postnatal period the highest density of gray matter can be found in the primary sensorimotor cortex, while prefrontal cortex matures later. Subcortical areas of the brain, especially the limbic system and the reward system, develop earlier; therefore, there is an imbalance between the more mature subcortical areas and the less mature prefrontal areas during adolescence. This could explain the typical behavior patterns of this period of life.


Assuntos
Comportamento do Adolescente/fisiologia , Envelhecimento/fisiologia , Encéfalo/fisiologia , Adolescente , Emoções/fisiologia , Humanos , Transtornos Mentais/fisiopatologia , Plasticidade Neuronal/fisiologia
15.
Phys Chem Chem Phys ; 17(41): 27473-80, 2015 Nov 07.
Artigo em Inglês | MEDLINE | ID: mdl-26426125

RESUMO

The incidence of high-energy radiation onto icy surfaces constitutes an important route for leading new neutral or ionized molecular species back to the gas phase in interstellar and circumstellar environments, especially where thermal desorption is negligible. In order to simulate such processes, an acetonitrile ice (CH3CN) frozen at 120 K is bombarded by high energy electrons, and the desorbing positive ions are analyzed by time-of-flight mass spectrometry (TOF-MS). Several fragment and cluster ions were identified, including the Hn=1-3(+), CHn=0-3(+)/NHn=0-1(+); C2Hn=0-3(+)/CHn=0-3N(+), C2Hn=0-6N(+) ion series and the ion clusters (CH3CN)n=1-2(+) and (CH3CN)n=1-2H(+). The energy dependence on the positive ion desorption yield indicates that ion desorption is initiated by Coulomb explosion following Auger electronic decay. The results presented here suggest that non-thermal desorption processes, such as desorption induced by electronic transitions (DIET) may be responsible for delivering neutral and ionic fragments from simple nitrile-bearing ices to the gas-phase, contributing to the production of more complex molecules. The derived desorption yields per electron impact may contribute to chemical evolution models in different cold astrophysical objects, especially where the abundance of CH3CN is expected to be high.

16.
Int J Immunogenet ; 42(4): 287-91, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26041373

RESUMO

Two novel CD1D alleles were identified in unrelated individuals from Morocco. They differ each from the common CD1D*01 allele by one nucleotide substitution in exon 2 resulting in one amino acid change in the G-ALPHA1-LIKE domain. According to the IMGT unique numbering for G domain, CD1D*03 has one nucleotide transition c136 > t in codon 46, with an arginine-to-cysteine amino acid change (R46 > C) in the D-STRAND, whereas CD1D*04 has one transition c98 > t in codon 33, with a threonine-to-methionine amino acid change (T33 > M) in the C-STRAND. This suggests that CD1D is more polymorphic than previously assumed.


Assuntos
Substituição de Aminoácidos/genética , Antígenos CD1d/genética , Polimorfismo Genético , Alelos , Éxons , Humanos , Dados de Sequência Molecular , Marrocos , Conformação Proteica , Análise de Sequência de DNA
17.
Helicobacter ; 19 Suppl 1: 1-5, 2014 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-25167938

RESUMO

Medline and PubMed databases were searched on epidemiology of Helicobacter pylori for the period of April 2013-March 2014. Several studies have shown that the prevalence of H. pylori is still high in most countries. In north European and North American populations, about one-third of adults are still infected, whereas in south and east Europe, South America, and Asia, the prevalence of H. pylori is often higher than 50%. H. pylori remains highly prevalent in immigrants coming from countries with high prevalence of H. pylori. However, the lower prevalence of infection in the younger generations suggests a further decline of H. pylori prevalence in the coming decades. Low socioeconomic conditions in childhood are confirmed to be the most important risk factors for H. pylori infection. Although the way the infection is transmitted is still unclear, interpersonal transmission appears to be the main route. Finally, H. pylori recurrence after successful eradication can still occur, but seems to be an infrequent event.


Assuntos
Infecções por Helicobacter/epidemiologia , Helicobacter pylori/fisiologia , América/epidemiologia , Ásia/epidemiologia , Europa (Continente)/epidemiologia , Infecções por Helicobacter/microbiologia , Infecções por Helicobacter/transmissão , Helicobacter pylori/genética , Helicobacter pylori/isolamento & purificação , Humanos , Fatores de Risco
18.
J Appl Microbiol ; 116(1): 191-8, 2014 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-24102847

RESUMO

AIM: The aim of this work was to evaluate the efficacy of domestic cooking in inactivating Manila clams experimentally infected with murine norovirus (MNV). METHODS AND RESULTS: A cooking pan was modified to enable electronic temperature probes to be positioned to record both flesh and environment temperature. Manila clams were infected with 10(4) TCID 50% ml(-1) of MNV. The infected whole-in-shell clams, divided into three replicates, were cooked on an electric stove, and groups of nine clams were removed from the pan at fixed intervals. Pools of three digestive glands were examined by virus isolation to ascertain residual viral load. CONCLUSION: Results showed that 10 min of cooking by a traditional domestic method at a temperature close to 100°C, for at least 2 min, can completely devitalize the MNV in infected clams. This is generally the time needed for the majority of valves to open up. SIGNIFICANCE AND IMPACT OF THE STUDY: At present, it is highly recommended to label all lagoon products as 'requiring cooking before consumption', but no specifications are given on how long and at what temperature they should be cooked. Our results can provide the consumer with useful indications on how to cook clams to prevent any risk of foodborne illness.

19.
Artigo em Inglês | MEDLINE | ID: mdl-38842039

RESUMO

BACKGROUND: Sedation, ranging from minimal, moderate and deep sedation to general anesthesia, improves patient comfort and procedure quality in gastrointestinal endoscopy (GIE). There are currently no comprehensive recommendations on sedation practice in diagnostic and therapeutic GIE. We aimed to investigate real-life sedation practice in elective GIE. METHODS: We performed a multicentric observational study across 14 Endoscopy Units in Italy. We recorded consecutive data on all diagnostic procedures performed with Anesthesiologist-directed care (ADC) and all therapeutic procedures performed with ADC or non-Anesthesiologist sedation (NAS) over a three-month period. RESULTS: Dedicated ADC is available five days/week in 28.6% (4/14), four days/week in 21.5% (3/14), three days/week in 35.7% (5/14), two days/week in 7.1% (1/14) and one day/week in 7.1% (1/14) of participating Centers. ADC use for elective diagnostic GIE varied from 18.2% to 75.1% of the total number of procedures performed with ADC among different Centers. ADC use for elective therapeutic GIE varied from 10.8% to 98.9% of the total number of elective therapeutic procedures performed among different Centers. CONCLUSIONS: Our study highlights the lack of standardization and consequent great variability in sedation practice for elective GIE, with ADC being potentially overused for diagnostic procedures and underused for complex therapeutic procedures. A collaborative effort involving Endoscopists, Anesthesiologist and Institutions is needed to optimize sedation practice in GIE.

20.
Oral Oncol ; 155: 106874, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38878355

RESUMO

OBJECTIVES: Clinical and imaging examinations frequently have indeterminate results during cancer surveillance, which can lead to overtreatment and cause psychological and financial harm to the patient. This study addresses the critical need to enhance diagnostic precision and decision-making in the management of HPV-associated oropharyngeal cancer. This study evaluated the utility of tumor tissue-modified viral (TTMV)-HPV DNA to resolve indeterminate disease status following definitive treatment for HPV-associated oropharyngeal cancer. MATERIALS AND METHODS: In this retrospective cohort, patients treated for HPV-associated oropharyngeal cancer at eight U.S. institutions and who received one or more TTMV-HPV DNA tests during post-treatment surveillance between February 2020 and January 2022 were included. RESULTS: Among 543 patients, 210 patients (38.7%; 210/543) experienced one or more clinically indeterminate findings (CIFs) during surveillance, with 503 CIFs recorded. Of those patients with an "indeterminate" disease status at a point during surveillance, 79 were associated with contemporaneous TTMV-HPV DNA testing. TTMV-HPV DNA testing demonstrated high accuracy (97.5%; 77/79) in correctly determining recurrence status. Patients whose disease status was "indeterminate" at the time of a positive TTMV-HPV DNA test were clinically confirmed to recur faster than those whose disease status was "no evidence of disease." Only 3% of patients (17/543) experienced indeterminate TTMV-HPV DNA tests during surveillance. Discordance between TTMV-HPV DNA tests and clinical results was minimal, with only 0.6% (3/543) of patients showing positive tests without recurrence. CONCLUSION: Our findings support the utility of circulating TTMV-HPV DNA in resolving indeterminate disease status and informing the subsequent clinical course.


Assuntos
DNA Viral , Neoplasias Orofaríngeas , Infecções por Papillomavirus , Humanos , Neoplasias Orofaríngeas/virologia , Feminino , Masculino , Pessoa de Meia-Idade , DNA Viral/análise , Estudos Retrospectivos , Infecções por Papillomavirus/diagnóstico , Infecções por Papillomavirus/virologia , Infecções por Papillomavirus/complicações , Idoso , Papillomaviridae/genética , Papillomaviridae/isolamento & purificação , Adulto
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