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1.
Anal Chem ; 94(21): 7584-7593, 2022 05 31.
Artigo em Inglês | MEDLINE | ID: mdl-35588463

RESUMO

In this study, we examined the influence of functionalized poly(3,4-ethylenedioxythiophene) (PEDOT) nanostructures decorated on the channel layer of an organic electrochemical transistor (OECT) for the detection of sweat cortisol, an adrenocorticosteroid stress hormone. The OECT device featured a bilayer channel confined by a PEDOT:polystyrenesulfonate (PSS) underlayer and a nanostructure-decorated upper layer engineered from the monomers EDOT-COOH and EDOT-EG3 through template-free electrochemical polymerization. This molecular design allowed antibody conjugation using 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide/N-hydroxysulfosuccinimide coupling through the carboxylic acid side chain, with EDOT-EG3 known to minimize nonspecific binding of biomolecules. We also engineered an OECT device having a channel area without any nanostructures to gain insight into the effect of the nanostructures on cortisol sensing. Our new nanostructure-embedded OECT device facilitated real-time detection of cortisol at concentrations ranging from 1 fg/mL to 1 µg/mL with a detection limit of 0.0088 fg/mL with good linearity (R2 = 0.9566), in addition to excellent selectivity toward cortisol among other structurally similar interfering compounds and high stability and reproducibility. With its rapid response for the detection of 100 ng/mL cortisol-spiked artificial sweat, this nanostructure-decorated OECT device has potential clinical practicality and utility in wearable sensors for future healthcare applications.


Assuntos
Nanoestruturas , Suor , Compostos Bicíclicos Heterocíclicos com Pontes , Hidrocortisona , Poli A , Polímeros , Reprodutibilidade dos Testes
2.
J Neurosci ; 33(21): 9013-20, 2013 May 22.
Artigo em Inglês | MEDLINE | ID: mdl-23699512

RESUMO

The translation of dendritic microtubule-associated protein 1B (MAP1B) is exaggerated upon group I mGluR activation leading to AMPA receptor (AMPAR) endocytosis and consequent long-term depression. However, the mechanisms of regulation of MAP1B protein synthesis in the mature dendrites remain unclear. Here we have identified miR-146a-5p that targets the 3' UTR of MAP1B mRNA and represses its translation. Inhibition of the endogenous miR-146a-5p in mouse cultured hippocampal neurons triggers an increase of the dendritic MAP1B protein as well as the internalization of AMPARs, resulting in a decline in synaptic transmission. Conversely, enforced expression of miR-146a-5p inhibits MAP1B translation and attenuates group I mGluR-induced AMPAR endocytosis. Moreover, siRNA-mediated knockdown of MAP1B recovers the impairment of synaptic transmission caused by inhibition of miR-146a-5p. These results reveal that miR-146a-5p modulates the synaptic plasticity via repression of MAP1B protein synthesis.


Assuntos
Endocitose/fisiologia , MicroRNAs/metabolismo , Proteínas Associadas aos Microtúbulos/metabolismo , Receptores de AMPA/metabolismo , 6-Ciano-7-nitroquinoxalina-2,3-diona/farmacologia , Análise de Variância , Animais , Células Cultivadas , Dendritos/efeitos dos fármacos , Dendritos/metabolismo , Estimulação Elétrica , Embrião de Mamíferos , Endocitose/efeitos dos fármacos , Antagonistas de Aminoácidos Excitatórios/farmacologia , Potenciais Pós-Sinápticos Excitadores/efeitos dos fármacos , Potenciais Pós-Sinápticos Excitadores/genética , Feminino , Regulação da Expressão Gênica/efeitos dos fármacos , Regulação da Expressão Gênica/genética , Hipocampo/citologia , Masculino , Metoxi-Hidroxifenilglicol/análogos & derivados , Metoxi-Hidroxifenilglicol/farmacologia , Camundongos , Camundongos Endogâmicos C57BL , MicroRNAs/genética , Neurônios/citologia , Neurônios/efeitos dos fármacos , Neurônios/ultraestrutura , Técnicas de Patch-Clamp , RNA Mensageiro/metabolismo , RNA Interferente Pequeno/genética , RNA Interferente Pequeno/metabolismo , Receptores de AMPA/genética , Transfecção , Valina/análogos & derivados , Valina/farmacologia
3.
Trauma Violence Abuse ; : 15248380241227986, 2024 Jan 31.
Artigo em Inglês | MEDLINE | ID: mdl-38293961

RESUMO

Adolescent aggressive behavior has increasingly become a central issue affecting the safety of both school campuses and the broader society. Despite the existence of numerous community interventions targeting this issue, there has been a paucity of efforts to consolidate the findings on the effectiveness of community-based programs in preventing aggressive behavior. This meta-analysis sought to address this gap by reviewing and assessing the impact of community-based initiatives on reducing adolescent aggression. A thorough search was carried out on 12 electronic databases: EBSCO, ERIC, PubMed, PsycINFO, MEDLINE, EMBASE, Scopus, Web of Science, ProQuest Dissertations and Theses, the China National Knowledge, Wanfang Databases, and China Science and Technology Journal Database. Sixteen studies were finalized, and meta-analyses were performed using a random effect model on RevMan v5.4 software developed by Cochrane. The analysis encompassed 16 published studies, involving a total of 2,585 participants. The key components of existing programs for aggression reduction included providing behavioral skills and training for adolescents, employing a problem-solving approach to address behavioral issues, offering psychological treatment, and emphasizing community supervision. The results indicate a significant positive effect of community-based interventions on aggression reduction (standardized mean difference = -0.26, 95% confidence intervals [-0.39, -0.13], Z = 3.84, p < .001). The subgroup analyses revealed that the intervention's effectiveness was moderated by the duration of the intervention, its theoretical foundation, and the sample size. This study furnishes empirical evidence supporting the enhancement of policies and practices to foster community engagement in mitigating aggressive behavior.

4.
Psychol Rep ; : 332941241252778, 2024 May 08.
Artigo em Inglês | MEDLINE | ID: mdl-38718423

RESUMO

The COVID-19 pandemic posed risks to the psychosocial development of children and adolescents in the digital age. Under such a background, this study aims to examine the effects of pandemic stress on cyberbullying perpetration and victimization among Chinese adolescents, and to explore the mediator of perceived safety and the moderator of family cohesion underlying this association, during China's outbreak of Omicron. A sample of 822 adolescents was obtained from Taizhou in Zhejiang Province, China, based on a multistage cluster random sampling method. The results showed that pandemic stress was positively associated with cyberbullying perpetration and victimization. Moreover, pandemic stress negatively predicted perceived safety, which in turn, increased the probability of cyberbullying perpetration and victimization. Furthermore, family cohesion moderated the effects of pandemic stress on cyberbullying perpetration and victimization. This study contributes to practical implications for policy making and social work practices regarding how to protect adolescents from cyberbullying during the pandemic.

5.
ACS Appl Mater Interfaces ; 16(11): 13384-13398, 2024 Mar 20.
Artigo em Inglês | MEDLINE | ID: mdl-38454789

RESUMO

Organic electrochemical transistors (OECTs) employing conductive polymers (CPs) have gained remarkable prominence and have undergone extensive advancements in wearable and implantable bioelectronic applications in recent years. Among the diverse arrays of CPs, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a common choice for the active-layer channel in p-type OECTs, showing a remarkably high transconductance for the high amplification of signals in biosensing applications. This investigation focuses on the novel engineering of PEDOT:PSS composite materials by seamlessly integrating several additives, namely, dimethyl sulfoxide (DMSO), (3-glycidyloxypropyl)trimethoxysilane (GOPS), and a nonionic fluorosurfactant (NIFS), to fine-tune their electrical conductivity, self-healing capability, and stretchability. To elucidate the intricate influences of the DMSO, GOPS, and NIFS additives on the formation of PEDOT:PSS composite films, theoretical calculations were performed, encompassing the solubility parameters and surface energies of the constituent components of the NIFS, PEDOT, PSS, and PSS-GOPS polymers. Furthermore, we conducted a comprehensive array of material analyses, which reveal the intricacies of the phase separation phenomenon and its interaction with the materials' characteristics. Our research identified the optimal composition for the PEDOT:PSS composite films, characterized by outstanding self-healing and stretchable capabilities. This composition has proven to be highly effective for constructing an active-layer channel in the form of OECT-based biosensors fabricated onto polydimethylsiloxane substrates for detecting dopamine. Overall, these findings represent significant progress in the application of PEDOT:PSS composite films in wearable bioelectronics and pave the way for the development of state-of-the-art biosensing technologies.

6.
Cell Rep ; 43(6): 114265, 2024 Jun 25.
Artigo em Inglês | MEDLINE | ID: mdl-38805396

RESUMO

The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike (S) protein continues to evolve antigenically, impacting antibody immunity. D1F6, an affinity-matured non-stereotypic VH1-2 antibody isolated from a patient infected with the SARS-CoV-2 ancestral strain, effectively neutralizes most Omicron variants tested, including XBB.1.5. We identify that D1F6 in the immunoglobulin G (IgG) form is able to overcome the effect of most Omicron mutations through its avidity-enhanced multivalent S-trimer binding. Cryo-electron microscopy (cryo-EM) and biochemical analyses show that three simultaneous epitope mutations are generally needed to substantially disrupt the multivalent S-trimer binding by D1F6 IgG. Antigenic mutations at spike positions 346, 444, and 445, which appeared in the latest variants, have little effect on D1F6 binding individually. However, these mutations are able to act synergistically with earlier Omicron mutations to impair neutralization by affecting the interaction between D1F6 IgG and the S-trimer. These results provide insight into the mechanism by which accumulated antigenic mutations facilitate evasion of affinity-matured antibodies.


Assuntos
Anticorpos Neutralizantes , Anticorpos Antivirais , COVID-19 , Mutação , SARS-CoV-2 , Glicoproteína da Espícula de Coronavírus , Glicoproteína da Espícula de Coronavírus/imunologia , Glicoproteína da Espícula de Coronavírus/genética , Glicoproteína da Espícula de Coronavírus/química , Glicoproteína da Espícula de Coronavírus/metabolismo , SARS-CoV-2/imunologia , SARS-CoV-2/genética , SARS-CoV-2/metabolismo , Humanos , Anticorpos Antivirais/imunologia , Anticorpos Neutralizantes/imunologia , COVID-19/virologia , COVID-19/imunologia , Epitopos/imunologia , Imunoglobulina G/imunologia , Imunoglobulina G/metabolismo , Microscopia Crioeletrônica , Ligação Proteica
7.
Oncol Res ; 31(1): 23-34, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37303737

RESUMO

This study aimed to examine the association between the use of H1-antihistamines (AHs) and head and neck cancer (HNC) risk in patients with type 2 diabetes mellitus (T2DM). Data from the National Health Insurance Research Database of Taiwan were analyzed for the period from 2008 to 2018. A propensity-score-matched cohort of 54,384 patients each in the AH user and nonuser groups was created and analyzed using Kaplan-Meier method and Cox proportional hazards regression. The results showed that the risk of HNC was significantly lower in AH users (adjusted hazard ratio: 0.55, 95% CI: 0.48 to 0.64) and the incidence rate was also lower (5.16 vs. 8.10 per 100,000 person-years). The lower HNC incidence rate in AH users (95% CI: 0.63; 0.55 to 0.73) suggests that AH use may reduce the risk of HNC in T2DM patients.


Assuntos
Diabetes Mellitus Tipo 2 , Neoplasias de Cabeça e Pescoço , Humanos , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/tratamento farmacológico , Diabetes Mellitus Tipo 2/epidemiologia , Neoplasias de Cabeça e Pescoço/epidemiologia , Antagonistas dos Receptores Histamínicos
8.
Eur Arch Otorhinolaryngol ; 268(11): 1583-7, 2011 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-21607579

RESUMO

The aim of this study was to evaluate the efficacy of transnasal endoscopic marsupialization as a treatment modality in patients with postoperative maxillary mucoceles and to compare the efficacy of marsupialization via middle meatal antrostomy with that of marsupialization via inferior meatal antrostomy. The study design was a retrospective clinical series and the setting was a tertiary referral center. After obtaining approval from the local ethics committee, we reviewed the medical records of 39 consecutive patients with postoperative maxillary mucoceles who were diagnosed and treated at the Department of Otolaryngology, Chang Gung Memorial Hospital, Taiwan, from 2004 to 2009. Transnasal endoscopic marsupialization was performed on 32 patients (34 sides) with postoperative maxillary mucoceles. All patients were followed for more than 12 months after surgery, and recurrence was noted in five patients (14.9%). Recurrence was experienced by five patients who underwent inferior meatal antrostomy and zero patients who underwent middle meatal antrostomy; thus, a statistically significant difference (p = 0.04) was observed. Transnasal endoscopic marsupialization is an effective modality for postoperative maxillary mucoceles and results in reduced morbidity. The use of middle meatal antrostomy in particular is preferred.


Assuntos
Endoscopia/métodos , Seio Maxilar/cirurgia , Mucocele/cirurgia , Procedimentos Cirúrgicos Otorrinolaringológicos/métodos , Doenças dos Seios Paranasais/cirurgia , Adulto , Idoso , Feminino , Seguimentos , Humanos , Masculino , Seio Maxilar/diagnóstico por imagem , Seio Maxilar/patologia , Pessoa de Meia-Idade , Mucocele/diagnóstico , Nariz , Doenças dos Seios Paranasais/diagnóstico , Estudos Retrospectivos , Fatores de Tempo , Tomografia Computadorizada por Raios X , Resultado do Tratamento
9.
Hepatogastroenterology ; 57(97): 107-13, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-20422883

RESUMO

BACKGROUND/AIMS: The use of chemotherapy in hepatocellular carcinoma is still controversial. The aim of this study was to investigate whether the combined use of epirubicin and progesterone has a synergistic effect on cell proliferation and apoptosis in HepG2 cells. METHODOLOGY: Different concentrations of epirubicin (0.1 microg/ml, 0.25 microg/ml and 0.5microg/ml) or progesterone (12.5 microM, 25 microM and 50 microM) were added to HepG2 cells either alone or in combinations consisting of different concentrations of the two. Their effects on HepG2 cells were studied by (1) XTT assay for analysis of cell proliferation, (2) 3H-Thymidine incorporation for DNA synthesis, (3) annexin V-FITC/ propidium iodide (PI) flowcytometery for cell apoptosis, (4) flowcytometry for cell cycle distributions, and (5) reverse transcription-polymerase chain reaction for expression of cell cycle modulator, cyclin D1. RESULTS: 50 microM progesterone increased both the cytotoxic and apoptotic effects of 0.1 microg/ml epirubicin on HepG2 cells at 48 hr culture due to 50 microM progesterone accumulated cells in S phase of the cell cycle and subsequently reduced cyclin D1 expression. These effects on HepG2 cells induced by this combination were comparable to those induced by 0.5 microg/ml epirubicin alone. CONCLUSIONS: In vitro, progesterone can increase the cytotoxicity and apoptosis induced by epirubicin on HepG2 cells.


Assuntos
Antibióticos Antineoplásicos/farmacologia , Carcinoma Hepatocelular/patologia , Epirubicina/farmacologia , Neoplasias Hepáticas/patologia , Progesterona/farmacologia , Progestinas/farmacologia , Apoptose/efeitos dos fármacos , Carcinoma Hepatocelular/tratamento farmacológico , Técnicas de Cultura de Células , Proliferação de Células/efeitos dos fármacos , Ciclina D1/metabolismo , Sinergismo Farmacológico , Células Hep G2/efeitos dos fármacos , Humanos , Neoplasias Hepáticas/tratamento farmacológico , Fase S/efeitos dos fármacos
10.
PLoS One ; 15(3): e0229853, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32176715

RESUMO

OBJECTIVE: Needlestick and sharp injuries (NSIs) experienced by physicians have been identified as a major occupational hazard. Blood-borne pathogens resulting from the NSIs experienced by physicians pose severe physical and psychological threats to them, as well as people who are around them. However, there is little research focusing on physicians' behaviours to prevent NSIs. In the present study, we investigated the roles of safety climate, job demands experienced by physicians, and physicians' self-efficacy in affecting physicians' behaviours to prevent NSIs. METHODS: 401 physicians from four teaching hospitals in Northern Taiwan were recruited to participate in an anonymous survey. Among them, 189 physicians returned the completed survey with a response rate of 47.1%. RESULTS: Overall, respondents reported frequently engaging in NSI prevention behaviours. As expected, safety climate in hospitals and physicians' self-efficacy to prevent NSIs were significantly related to their behaviours to prevent NSIs (r = 0.22 and r = 0.33, respectively). The moderating analysis also revealed that physicians with high self-efficacy tended to engage in NSI prevention behaviours regardless of levels of job demand they experienced. In contrast to our expectation, however, physicians with low self-efficacy engaged in more NSI prevention behaviours when job demands were high than when the demands were low. CONCLUSIONS: Our findings show the important roles safety climate, job demands and self-efficacy play in shaping physicians' NSI prevention behaviours. Hospitals may consider improving safety climate via strengthening management commitments to NSIs prevention, reducing job demands by training physicians to proactively redesign their own jobs, and increasing physicians' self-efficacy via well-designed skill-based training.


Assuntos
Ferimentos Penetrantes Produzidos por Agulha/prevenção & controle , Exposição Ocupacional/prevenção & controle , Médicos/psicologia , Feminino , Hospitais , Humanos , Masculino , Ferimentos Penetrantes Produzidos por Agulha/epidemiologia , Ferimentos Penetrantes Produzidos por Agulha/psicologia , Inquéritos e Questionários , Taiwan/epidemiologia
11.
Hu Li Za Zhi ; 55(3): 49-60, 2008 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-18543185

RESUMO

The purpose of this study was to develop an add-on module for the Taiwan-version WHOQOL-BREF for assessing the quality of life of people with allergic rhinitis. A cross-sectional survey design was used. In accordance with the seven steps for the development of population-specific modules of the WHOQOL, the instrument added new items on the basis of opinions of expert groups, including patients, families and physicians, to the Taiwan-version WHOQOL-BREF measure. The new questionnaire, comprising 52 items, was tested on 252 patients with allergic rhinitis. For content validity, each item was significantly correlated with the domain to which it belonged (r= .157-.715, p< .05); and each domain was significantly correlated with each other domain (r= .211-.535, p< .01). The construct validity was examined by means of the multitrait-multimethod method. The total score and the scores on the physiological and environmental subscales showed convergent validity with the score for IgE (r= -.317 - -.380, p< .01) and with the total score and the scores on the subscale of the allergic rhinitis symptom questionnaire (r= -.202 - -.360, p< .01). The scores on the body constitution subscale also showed convergent validity with the score for IgE (r= .329, p< .01) and with the total score and the scores on the subscale of the allergic rhinitis symptom questionnaire (r= .187-.261, p< .01). This result supports the appropriateness of this new questionnaire specifically for assessing the quality of life of people with allergic rhinitis. As regards concurrent validity, the total score was significantly correlated with the score of all subscales in the Medical Outcomes Study Short Form Taiwan-version (SF-36) (r= .256-.542, p< .01). The internal consistency reliability established by Cronbach's alpha ranged for each domain from .73-.81. The test-retest reliability correlated for each domain of the instrument was .719-.794 (p< .01). In conclusion, the add-on module developed in this paper for the Taiwan-version WHOQOL-BREF for patients with allergic rhinitis is reliable, valid and specific.


Assuntos
Qualidade de Vida , Rinite Alérgica Perene/psicologia , Rinite Alérgica Sazonal/psicologia , Adulto , Feminino , Humanos , Imunoglobulina E/sangue , Masculino , Pessoa de Meia-Idade
12.
Anim Sci J ; 88(6): 882-892, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-27753175

RESUMO

Interferons have attracted considerable attention due to their vital roles in the host immune response and low induction of antibiotic resistance. In this study, total RNA was extracted from spleen cells of chicken embryos inoculated with Newcastle disease vaccine, and the full-length chicken interferon-γ (ChIFN-γ) gene was amplified by RT-PCR. The full complementary DNA sequence of the ChIFN-γ gene was 495 bp long and was cloned into the prokaryotic expression vector pProEX™HTb . The plasmid was transformed into Escherichia coli DH5α and the expression of ChIFN-γ was induced by isopropyl ß-D-1-thiogalactopyranoside. Sodium dodecyl sulfate - polyacrylamide gel electrophoresis and Western blot results showed the expressed fusion protein had a molecular weight of approximately 18 kDa and was recognized by an anti-His mAb. Moreover, ChIFN-γ was found to demonstrate anti-viral activity in vitro. To test the in vivo function of ChIFN-γ in broilers under heat stress, a total of 100 broilers were randomly assigned to either a control group or a treated group, in which they were hypodermically injected with recombinant ChIFN-γ. Results demonstrated ChIFN-γ affects the messenger RNA expression levels of heat shock protein 70 (HSP70) in the heart and lung tissues, and decreases the concentration of HSP70 in serum. Therefore, we conclude recombinant ChIFN-γ can reduce heat stress to some extent in vivo.


Assuntos
Expressão Gênica , Proteínas de Choque Térmico HSP70/genética , Proteínas de Choque Térmico HSP70/metabolismo , Resposta ao Choque Térmico/genética , Resposta ao Choque Térmico/fisiologia , Interferon gama/genética , Interferon gama/metabolismo , RNA/genética , RNA/metabolismo , Animais , Antivirais , Embrião de Galinha , Galinhas , Proteínas de Choque Térmico HSP70/sangue , Transtornos de Estresse por Calor/prevenção & controle , Interferon gama/administração & dosagem , Interferon gama/farmacologia , Pulmão/metabolismo , Miocárdio/metabolismo , Proteínas Recombinantes de Fusão/administração & dosagem , Proteínas Recombinantes de Fusão/genética , Proteínas Recombinantes de Fusão/metabolismo , Proteínas Recombinantes de Fusão/farmacologia , Baço/citologia , Baço/embriologia , Baço/metabolismo
13.
Otolaryngol Head Neck Surg ; 134(3): 499-505, 2006 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-16500453

RESUMO

OBJECTIVES: This study aimed to investigate the prevalence of optic nerve protrusion (ONP) and its clinical indicators by using sinus computed tomography (CT) scan. STUDY DESIGN: Sinus CT scans of 260 consecutive patients with chronic inflammatory sinus disease were reviewed. RESULTS: The prevalence of ONP in our study population was 28%. Nineteen percent of the optic nerves protruded into the sphenoid sinuses including indentation of the sinus wall (12%) and coursing through the sphenoid sinus (8%). In the presence of contralateral ONP and/or ipsilateral anterior clinoid process pneumatization, the chance of ONP occurrence was significantly higher (both P < 0.01). They were reliable indicators of ONP (R(2) = 0.47, P < 0.01). CONCLUSIONS: ONP is a common anatomic variation observed in patients with chronic inflammatory sinus disease. To reduce optic nerve damage in surgeries, the presence of ONP according to sinus CT scans and the intraoperative findings should be carefully evaluated. EBM RATING: C-4.


Assuntos
Nervo Óptico/diagnóstico por imagem , Seio Esfenoidal/inervação , Sinusite Esfenoidal/diagnóstico por imagem , Tomografia Computadorizada por Raios X , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Doenças Ósseas/diagnóstico por imagem , Doença Crônica , Seio Etmoidal/diagnóstico por imagem , Seio Etmoidal/inervação , Feminino , Humanos , Complicações Intraoperatórias/prevenção & controle , Masculino , Pessoa de Meia-Idade , Doenças do Nervo Óptico/diagnóstico por imagem , Traumatismos do Nervo Óptico/prevenção & controle , Prolapso , Estudos Retrospectivos , Fatores Sexuais , Osso Esfenoide/diagnóstico por imagem , Osso Esfenoide/inervação , Seio Esfenoidal/diagnóstico por imagem , Seio Esfenoidal/cirurgia , Sinusite Esfenoidal/cirurgia
14.
Phytomedicine ; 23(12): 1422-1433, 2016 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-27765362

RESUMO

BACKGROUND: The F-box protein 7 (FBXO7) mutations have been identified in families with early-onset parkinsonism and pyramidal tract signs, and designated as PARK15. In addition, FBXO7 mutations were found in typical and young onset Parkinson's disease (PD). Evidence has also shown that FBXO7 plays an important role in the development of dopaminergic neurons and increased stability and overexpression of FBXO7 may be beneficial to PD. PURPOSE: We screened extracts of medicinal herbs to enhance FBXO7 expression for neuroprotection in MPP+-treated cells. METHODS: Promoter reporter assay in HEK-293 cells was used to examine the cis/trans elements controlling FBXO7 expression and to screen extracts of medicinal herbs enhancing FBXO7 expression. MTT assay was performed to assess cell viability of MPP+-treated HEK-293/SH-SY5Y cells. In addition, proteasome activity, mitochondrial membrane potential and FBXO7/TRAF2/GATA2 protein expression were evaluated. RESULTS: We demonstrated that -202--57 region of the FBXO7 promoter is likely to contain sequences that are bound by positive trans protein factors to activate FBXO7 expression and GATA2 is the main trans protein factor enhancing FBXO7 expression. Extracts of medicinal herbs Oenanthe javanica (Blume) DC. (Umbelliferae), Casuarina equisetifolia L. (Casuarinaceae), and Sorghum bicolor (L.) Moench (Gramineae) improved cell viability of both MPP+-treated HEK-293 and SH-SY5Y cells, rescued proteasome activity in MPP+-treated HEK-293 cells, and restored mitochondrial membrane potential in MPP+-treated SH-SY5Y cells. These protection effects of herbal extracts are acting through enhancing FBXO7 and decreasing TRAF2 expression, which is probably mediated by GATA2 induction. CONCLUSION: Collectively, our study provides new targets, FBXO7 and its regulator GATA2, for the development of potential treatments of PD.


Assuntos
1-Metil-4-fenilpiridínio/toxicidade , Proteínas F-Box/metabolismo , Fármacos Neuroprotetores/farmacologia , Oenanthe , Doença de Parkinson/metabolismo , Extratos Vegetais/farmacologia , Sorghum , Sobrevivência Celular/efeitos dos fármacos , Proteínas F-Box/genética , Fator de Transcrição GATA2/metabolismo , Expressão Gênica/efeitos dos fármacos , Regulação da Expressão Gênica/efeitos dos fármacos , Células HEK293 , Herbicidas/toxicidade , Humanos , Magnoliopsida , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Mutação , Fármacos Neuroprotetores/uso terapêutico , Doença de Parkinson/tratamento farmacológico , Fitoterapia , Extratos Vegetais/uso terapêutico , Regiões Promotoras Genéticas , Complexo de Endopeptidases do Proteassoma/metabolismo , Fator 2 Associado a Receptor de TNF/metabolismo
15.
J Occup Health ; 57(6): 540-7, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26423827

RESUMO

OBJECTIVES: Workplace violence in the health sector is a worldwide concern. Physicians play an essential role in health-care teamwork; thus, understanding how organizational factors influence workplace violence against physicians is critical. METHODS: A total of 189 physicians from three public hospitals and one private hospital in Northern Taiwan completed a survey, and the response rate was 47.1%. This study was approved by the institutional review board of each participating hospital. The 189 physicians were selected from the Taipei area, Taiwan. RESULTS: The results showed that 41.5% of the respondents had received at least one workplace-related physical or verbal violent threat, and that 9.8% of the respondents had experienced at least one episode of sexual harassment in the 3 months before the survey. Logistic regression analysis revealed that physicians in psychiatry or emergency medicine departments received more violent threats and sexual harassment than physicians in other departments. Furthermore, physicians with a lower workplace safety climate (OR=0.89; 95% CI=0.81-0.98) and more job demands (OR=1.15; 95% CI=1.02-1.30) were more likely to receive violent threats. CONCLUSIONS: This study found that workplace violence was associated with job demands and the workplace safety climate. Therefore, determining how to develop a workplace safety climate and ensure a safe job environment for physicians is a crucial management policy issue for health-care systems.


Assuntos
Hospitais de Ensino , Corpo Clínico Hospitalar/estatística & dados numéricos , Violência no Trabalho/estatística & dados numéricos , Local de Trabalho/estatística & dados numéricos , Adulto , Idoso , Agressão , Serviço Hospitalar de Emergência/estatística & dados numéricos , Feminino , Humanos , Modelos Logísticos , Masculino , Corpo Clínico Hospitalar/psicologia , Pessoa de Meia-Idade , Saúde Ocupacional , Unidade Hospitalar de Psiquiatria/estatística & dados numéricos , Assédio Sexual/estatística & dados numéricos , Inquéritos e Questionários , Taiwan , Local de Trabalho/psicologia , Violência no Trabalho/psicologia
16.
PLoS One ; 9(7): e101392, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25029497

RESUMO

Mutations in the F-box only protein 7 gene (FBXO7), the substrate-specifying subunit of SCF E3 ubiquitin ligase complex, cause Parkinson's disease (PD)-15 (PARK15). To identify new variants, we sequenced FBXO7 cDNA in 80 Taiwanese early onset PD patients (age at onset ≤ 50) and only two known variants, Y52C (c.155A>G) and M115I (c.345G>A), were found. To assess the association of Y52C and M115I with the risk of PD, we conducted a case-control study in a cohort of PD and ethnically matched controls. There was a nominal difference in the Y52C G allele frequency between PD and controls (p = 0.045). After combining data from China [1], significant difference in the Y52C G allele frequency between PD and controls (p = 0.012) and significant association of G allele with decreased PD risk (p = 0.017) can be demonstrated. Upon expressing EGFP-tagged Cys52 FBXO7 in cells, a significantly reduced rate of FBXO7 protein decay was observed when compared with cells expressing Tyr52 FBXO7. In silico modeling of Cys52 exhibited a more stable feature than Tyr52. In cells expressing Cys52 FBXO7, the level of TNF receptor-associated factor 2 (TRAF2) was significantly reduced. Moreover, Cys52 FBXO7 showed stronger interaction with TRAF2 and promoted TRAF2 ubiquitination, which may be responsible for the reduced TRAF2 expression in Cys52 cells. After induced differentiation, SH-SY5Y cells expressing Cys52 FBXO7 displayed increased neuronal outgrowth. We therefore hypothesize that Cys52 variant of FBXO7 may contribute to reduced PD susceptibility in Chinese.


Assuntos
Proteínas F-Box/genética , Doença de Parkinson/genética , Polimorfismo de Nucleotídeo Único , 1-Metil-4-fenilpiridínio/toxicidade , Adulto , Sequência de Aminoácidos , Animais , Estudos de Casos e Controles , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Sobrevivência Celular/genética , Proteínas F-Box/química , Proteínas F-Box/metabolismo , Feminino , Regulação da Expressão Gênica/efeitos dos fármacos , Predisposição Genética para Doença/genética , Humanos , Masculino , Pessoa de Meia-Idade , Modelos Moleculares , Dados de Sequência Molecular , Mutação , Doença de Parkinson/metabolismo , Doença de Parkinson/patologia , Fatores de Proteção , Estabilidade Proteica , Estrutura Secundária de Proteína , Homologia de Sequência de Aminoácidos , Fator 2 Associado a Receptor de TNF/metabolismo , Ubiquitinação/efeitos dos fármacos , Ubiquitinação/genética , Adulto Jovem
17.
Int Immunopharmacol ; 10(8): 951-8, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20546945

RESUMO

BACKGROUND: Perennial allergic rhinitis (AR) is a common health problem with a high prevalence rate of 43.6% in Taiwan. In our previous study, a mixed formula of Chinese herbs consisted of Xin-yi-san, Xiao-ging-long-tang, and Xiang-sha-liu-jun-zi-tang, exerted diverse immunomodulatory effects in the treatment of patients with perennial allergic rhinitis. OBJECTIVE: The aim of the present study was to determine whether Xin-yi-san (XYS) alone is effective in the treatment of AR and tried to explore its molecular mechanism of anti-allergic activity. METHODS: In a randomized double-blind study, 108 patients with AR received either XYS or a placebo for 3 months. The effectiveness of XYS was evaluated by nasal symptoms, nasal airflow resistance, nostril dissection area, and serum titer of specific IgE antibodies against house dust mite allergens. In addition, the production of T helper (Th) 1 (represented by interferon-gamma) and Th2 [represented by interleukin (IL)-4, IL-10, and IL-13] cytokines, the proinflammatory cytokine IL-8, soluble intercellular adhesion molecule (sICAM), and arachidonate metabolites prostagladin E(2) (PGE(2)) and leukotriene C(4) (LTC(4)) by polymorphonuclear neutrophils (PMNs) were compared before and after treatment between the two groups. RESULTS: XYS attenuated nasal symptoms (sneezing and rhinorrhea) and nasal congestion through reduction of nasal airflow resistance and increase in nostril dissection areas. We also found that XYS exerted diverse immunomodulatory effects, including suppression of serum IgE levels and increased production of IL-10, sICAM-1, and IL-8 compared to placebo group. However, XYS treatment did not affect the release of PGE(2) and LTC(4) from PMNs. CONCLUSIONS: This study originally provides the evidence that Xin-yi-san alone is an effective herb in the treatment of perennial allergic rhinitis.


Assuntos
Medicamentos de Ervas Chinesas/uso terapêutico , Imunoglobulina E/biossíntese , Medicina Tradicional Chinesa , Neutrófilos/efeitos dos fármacos , Rinite Alérgica Perene/tratamento farmacológico , Células Th1/efeitos dos fármacos , Células Th2/efeitos dos fármacos , Adulto , Animais , Antígenos de Dermatophagoides/imunologia , Misturas Complexas/administração & dosagem , Citocinas/biossíntese , Citocinas/genética , Citocinas/metabolismo , Medicamentos de Ervas Chinesas/administração & dosagem , Feminino , Humanos , Imunoglobulina E/sangue , Imunoglobulina E/genética , Imunomodulação , Masculino , Obstrução Nasal , Neutrófilos/imunologia , Neutrófilos/metabolismo , Neutrófilos/patologia , Pyroglyphidae/imunologia , Rinite Alérgica Perene/imunologia , Rinite Alérgica Perene/patologia , Rinite Alérgica Perene/fisiopatologia , Taiwan , Células Th1/imunologia , Células Th1/metabolismo , Células Th1/patologia , Células Th2/imunologia , Células Th2/metabolismo , Células Th2/patologia
18.
Arch Otolaryngol Head Neck Surg ; 135(9): 932-5, 2009 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-19770428

RESUMO

OBJECTIVE: To evaluate hospitalization rates and duration of surgery associated with transnasal endoscopic marsupialization compared with sublabial excision in treating nasolabial cysts. DESIGN: Retrospective clinical series. SETTING: Large urban community hospital. PATIENTS: Consecutive sample of 57 patients with nasolabial cysts treated from January 1, 2000, to February 29, 2008. INTERVENTIONS: Sublabial excision in 23 patients (sublabial group) and transnasal endoscopic marsupialization in 34 patients (transnasal group). Among 57 patients, 47 underwent preoperative computed tomography. MAIN OUTCOME MEASURES: History, clinical presentation, preoperative condition, histopathologic findings, treatment, complications, and outcomes. RESULTS: The mean duration of surgery was 91.3 minutes in the sublabial group and 29.5 minutes in the transnasal group (P = .003). The hospitalization rate was 100% (23 of 23) in the sublabial group and 59% (20 of 34) in the transnasal group (P < .001). The medical costs were significantly lower in the transnasal group than in the sublabial group (P = .002). The follow-up period ranged from 6 to 85 months. Neither group of patients experienced any major complications or recurrences during the follow-up period. CONCLUSION: Transnasal endoscopic marsupialization is an effective treatment for nasolabial cysts, is less costly, and has fewer complications than sublabial excision.


Assuntos
Cistos/cirurgia , Endoscopia/métodos , Doenças Nasais/cirurgia , Adulto , Procedimentos Cirúrgicos Ambulatórios , Estudos de Coortes , Cistos/diagnóstico , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Cavidade Nasal/cirurgia , Doenças Nasais/diagnóstico , Procedimentos Cirúrgicos Otorrinolaringológicos/métodos , Satisfação do Paciente , Estudos Retrospectivos , Índice de Gravidade de Doença , Resultado do Tratamento
19.
Headache ; 47(2): 295-7, 2007 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-17300375

RESUMO

Trigeminal neuropathy is characterized by sensory disturbance of the division of trigeminal nerve, and sometimes is associated with pain. Trigeminal neuropathy secondary to perineural invasion of sinonasal lymphoma is extremely rare. Likewise, sinonasal lymphoma is infrequently demonstrated initially with cranial neuropathy. The present case served to broaden the differential diagnosis of secondary trigeminal neuropathy and to alert clinicians to cautiously assess perineural spread of occult neoplasm in sinonasal tract and larynx or pharynx for cases with evolving trigeminal neuropathy or even other cranial nerve neuropathy in which no definite cause is identified.


Assuntos
Linfoma/complicações , Neoplasias dos Seios Paranasais/complicações , Doenças do Nervo Trigêmeo/etiologia , Idoso de 80 Anos ou mais , Humanos , Linfoma/diagnóstico , Linfoma/patologia , Imageamento por Ressonância Magnética , Masculino , Neoplasias dos Seios Paranasais/diagnóstico , Nervos Periféricos/patologia , Doenças do Nervo Trigêmeo/diagnóstico
20.
Am J Otolaryngol ; 27(6): 433-5, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-17084232

RESUMO

Burkitt's lymphoma is a common comorbidity of infection with the human immunodeficiency virus, but rarely the initial clinical manifestation of undiagnosed AIDS, especially for the otolaryngologist. We report the case of a patient with recalcitrant rhinosinusitis subsequently diagnosed with sinonasal Burkitt's lymphoma and HIV.


Assuntos
Linfoma de Burkitt/diagnóstico por imagem , Infecções por HIV/diagnóstico por imagem , Sinusite/diagnóstico , Adulto , Linfoma de Burkitt/etiologia , Linfoma de Burkitt/patologia , Diagnóstico Diferencial , Infecções por HIV/complicações , Infecções por HIV/patologia , Humanos , Masculino , Seios Paranasais/diagnóstico por imagem , Rinite/diagnóstico , Rinite/patologia , Sinusite/patologia , Tomografia Computadorizada por Raios X
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