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1.
RNA ; 26(4): 512-528, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-31980578

RESUMO

Programmed -1 ribosomal frameshifts (-1 PRFs) are commonly used by viruses to regulate their enzymatic and structural protein levels. Human T-cell leukemia virus type 1 (HTLV-1) is a carcinogenic retrovirus that uses two independent -1 PRFs to express viral enzymes critical to establishing new HTLV-1 infections. How the cis-acting RNA elements in this viral transcript function to induce frameshifting is unknown. The objective of this work was to conclusively define the 3' boundary of and the RNA elements within the HTLV-1 pro-pol frameshift site. We hypothesized that the frameshift site structure was a pseudoknot and that its 3' boundary would be defined by the pseudoknot's 3' end. To test these hypotheses, the in vitro frameshift efficiencies of three HTLV-1 pro-pol frameshift sites with different 3' boundaries were quantified. The results indicated that nucleotides included in the longest construct were essential to highly efficient frameshift stimulation. Interestingly, only this construct could form the putative frameshift site pseudoknot. Next, the secondary structure of this frameshift site was determined. The dominant structure was an H-type pseudoknot which, together with the slippery sequence, stimulated frameshifting to 19.4(±0.3)%. The pseudoknot's critical role in frameshift stimulation was directly revealed by examining the impact of structural changes on HTLV-1 pro-pol -1 PRF. As predicted, mutations that occluded pseudoknot formation drastically reduced the frameshift efficiency. These results are significant because they demonstrate that a pseudoknot is important to HTLV-1 pro-pol -1 PRF and define the frameshift site's 3' boundary.


Assuntos
Mudança da Fase de Leitura do Gene Ribossômico , Vírus Linfotrópico T Tipo 1 Humano/genética , RNA Mensageiro/genética , Regulação Viral da Expressão Gênica , Vírus Linfotrópico T Tipo 1 Humano/metabolismo , Motivos de Nucleotídeos , RNA Mensageiro/química , Ribossomos/metabolismo
2.
Glob Chang Biol ; 27(4): 713-715, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33064872

RESUMO

Fill et al. (Global Change Biology, 25, 3562-3569, 2019) reported significant increases in dry season length over the past 120 years in the Southeast US, suggesting increased wildfire risk in a region associated with a frequent fire regime. We identified two flaws that call into question the findings and their relevance to regional wildfire risk. First, with the exception of Florida, there is little evidence for a climatologically meaningful 'dry season' in the Southeast because most areas experience relatively evenly distributed monthly precipitation. Second, the sampling method used to derive Cumulative Rainfall Anomalies does not appear to actually reflect a bootstrap sample as described.


Assuntos
Mudança Climática , Raio , Florida , Estações do Ano , Sudeste dos Estados Unidos
3.
Int J Clin Pract ; 75(9): e14478, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34107148

RESUMO

AIM: To undertake a prospective study of the accuracy of two models (LACE and BOOST) in predicting unplanned hospital readmission in older patients (>75 years). METHODS: Data were collected from a single centre prospectively on 110 patients over 75 years old admitted to the acute medical unit. Follow-up was conducted at 30 days. The primary outcome was the c-statistic for both models. RESULTS: The readmission rate was 32.7% and median age 82 years, and both BOOST and LACE scores were significantly higher in those readmitted compared with those who were not. C-statistics were calculated for both tools with BOOST score 0.667 (95% CI 0.559-0.775, P = .005) and LACE index 0.685 (95% CI 0.579-0.792, P = .002). CONCLUSION: In this prospective study, both the BOOST and LACE scores were found to be significant yet poor, predictive models of hospital readmission. Recent hospitalisation (within the previous 6 months) was found to be the most significant contributing factor.


Assuntos
Serviço Hospitalar de Emergência , Readmissão do Paciente , Idoso , Idoso de 80 Anos ou mais , Comorbidade , Humanos , Tempo de Internação , Modelos Logísticos , Alta do Paciente , Estudos Prospectivos , Estudos Retrospectivos , Fatores de Risco
4.
Gen Comp Endocrinol ; 282: 113218, 2019 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-31301284

RESUMO

Progestin receptor membrane component (Pgrmc1 & 2) is a heme-binding protein. Studies on Pgrmc1 have suggested possible roles in heme binding, activation of steroid-synthesizing P450s, along with binding and transferring of membrane proteins. However, the studies of Pgrmc1's paralog, Pgrmc2 are still lacking. In order to determine the physiologic function(s) of Pgrmc2, we generated a zebrafish mutant line (pgrmc2-/-). We found a reduction in both spawning frequency and the number of embryos produced in female pgrmc2-/-. This subfertility is caused by reduced oocyte maturation (germinal vesicle breakdown, GVBD) in pgrmc2-/- in vivo. Nonetheless, oocytes from pgrmc2-/- had similar sensitivity to 17α,20ß-dihydroxy-4-pregnen-3-one (DHP, a maturation induced progestin in zebrafish) compared with wildtype (wt) in vitro. Therefore, we hypothesized that oocyte maturation tardiness found in vivo, could be due to lack of progestin in pgrmc2-/-. Interestingly, we found significant reduced expression of hormones, receptors, and steroid synthesizing enzymes including lhcgr, egfra, ar, and esr2, cyp11a1 and hsd3b1. In addition, DHP levels in pgrmc2-/- ovaries showed a significant decrease compared to those in wt. In summary, we have provided a plausible molecular mechanism for the physiological functions of Pgrmc2 in the regulation of female fertility, likely via regulation of receptors and steroids in the ovary, which in turn regulates oocyte maturation in zebrafish.


Assuntos
Infertilidade/metabolismo , Infertilidade/patologia , Proteínas de Membrana/metabolismo , Progestinas/biossíntese , Receptores de Progesterona/metabolismo , Proteínas de Peixe-Zebra/metabolismo , Peixe-Zebra/fisiologia , Animais , Sequência de Bases , Feminino , Regulação da Expressão Gênica , Infertilidade/genética , Proteínas de Membrana/genética , Mutação/genética , Oócitos/metabolismo , Oogênese , Folículo Ovariano/metabolismo , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Receptores de Progesterona/genética , Reprodução/genética , Maturidade Sexual , Peixe-Zebra/metabolismo , Proteínas de Peixe-Zebra/genética
5.
Am J Hematol ; 90(8): 702-8, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-25963299

RESUMO

Immune function abnormalities have been reported in patients with Fanconi anemia (FA), dyskeratosis congenita (DC) and, rarely, in Shwachman-Diamond syndrome (SDS), and Diamond-Blackfan anemia (DBA), but large systematic studies are lacking. We assessed immunological parameters in 118 patients with these syndromes and 202 unaffected relatives. We compared the results in patients with reference values, and with values in relatives after adjusting for age, sex, corticosteroid treatment, and severe bone marrow failure (BMF). Adult patients (≥18 years) with FA had significantly lower immunoglobulins (IgG, IgA and IgM), total lymphocytes, and CD4 T cells than reference values or adult relatives (P < 0.001); children with FA had normal values. Both children and adults with FA had lower B- and NK cells (P < 0.01) than relatives or reference values. Patients with DC had essentially normal immunoglobulins but lower total lymphocytes than reference values or relatives, and lower T-, B-, and NK-cells; these changes were more marked in children than adults (P < 0.01). Most patients with DBA and SDS had normal immunoglobulins and lymphocytes. Lymphoproliferative responses, serum cytokine levels, including tumor necrosis factor-α and interferon-γ, and cytokine levels in supernatants from phytohemagglutinin-stimulated cultures were similar across patient groups and relatives. Only patients with severe BMF, particularly those with FA and DC, had higher serum G-CSF and Flt3-ligand and lower RANTES levels compared with all other groups or relatives (P < 0.05). Overall, immune function abnormalities were seen mainly in adult patients with FA, which likely reflects their disease-related progression, and in children with DC, which may be a feature of early-onset severe disease phenotype.


Assuntos
Anemia de Diamond-Blackfan/diagnóstico , Doenças da Medula Óssea/diagnóstico , Disceratose Congênita/diagnóstico , Insuficiência Pancreática Exócrina/diagnóstico , Anemia de Fanconi/diagnóstico , Hemoglobinúria Paroxística/diagnóstico , Lipomatose/diagnóstico , Adolescente , Corticosteroides/uso terapêutico , Adulto , Idoso , Anemia Aplástica , Anemia de Diamond-Blackfan/tratamento farmacológico , Anemia de Diamond-Blackfan/imunologia , Anemia de Diamond-Blackfan/patologia , Linfócitos B/efeitos dos fármacos , Linfócitos B/imunologia , Linfócitos B/patologia , Doenças da Medula Óssea/congênito , Doenças da Medula Óssea/tratamento farmacológico , Doenças da Medula Óssea/imunologia , Transtornos da Insuficiência da Medula Óssea , Estudos de Casos e Controles , Criança , Pré-Escolar , Citocinas/biossíntese , Citocinas/imunologia , Disceratose Congênita/tratamento farmacológico , Disceratose Congênita/imunologia , Disceratose Congênita/patologia , Insuficiência Pancreática Exócrina/congênito , Insuficiência Pancreática Exócrina/tratamento farmacológico , Insuficiência Pancreática Exócrina/imunologia , Família , Anemia de Fanconi/tratamento farmacológico , Anemia de Fanconi/imunologia , Anemia de Fanconi/patologia , Feminino , Fator Estimulador de Colônias de Granulócitos/biossíntese , Fator Estimulador de Colônias de Granulócitos/imunologia , Hemoglobinúria Paroxística/congênito , Hemoglobinúria Paroxística/tratamento farmacológico , Hemoglobinúria Paroxística/imunologia , Humanos , Imunoglobulinas/biossíntese , Lactente , Interferon gama/biossíntese , Interferon gama/imunologia , Células Matadoras Naturais/efeitos dos fármacos , Células Matadoras Naturais/imunologia , Células Matadoras Naturais/patologia , Lipomatose/congênito , Lipomatose/tratamento farmacológico , Lipomatose/imunologia , Masculino , Proteínas de Membrana/biossíntese , Proteínas de Membrana/imunologia
6.
Mult Scler ; 20(6): 651-9, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24067896

RESUMO

BACKGROUND: Peroxisomes are organelles in eukaryotic cells with multiple functions including the detoxification of reactive oxygen species, plasmalogen synthesis and ß-oxidation of fatty acids. Recent evidence has implicated peroxisomal dysfunction in models of multiple sclerosis (MS) disease progression. OBJECTIVES: Our aims were to determine whether there are changes in peroxisomes in MS grey matter (GM) compared to control GM. METHODS: We analysed cases of MS and control GM immunocytochemically to assess peroxisomal membrane protein (PMP70) and neuronal proteins. We examined the expression of ABCD3 (the gene that encodes PMP70) in MS and control GM. Analyses of very long chain fatty acid (VLCFA) levels in GM were performed. RESULTS: PMP70 immunolabelling of neuronal somata was significantly lower in MS GM compared to control. Calibration of ABCD3 gene expression with reference to glyceraldehyde 3-phsophate dehydrogenase (GAPDH) revealed overall decreases in expression in MS compared to controls. Mean PMP70 counts in involved MS GM negatively correlated to disease duration. Elevations in C26:0 (hexacosanoic acid) were found in MS GM. CONCLUSIONS: Collectively, these observations provide evidence that there is an overall reduction in peroxisomal gene expression and peroxisomal proteins in GM neurons in MS. Changes in peroxisomal function may contribute to neuronal dysfunction and degeneration in MS.


Assuntos
Substância Cinzenta/patologia , Proteínas de Membrana/metabolismo , Esclerose Múltipla/patologia , Neurônios/patologia , Peroxissomos/patologia , Transportadores de Cassetes de Ligação de ATP/metabolismo , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Expressão Gênica/fisiologia , Substância Cinzenta/metabolismo , Humanos , Masculino , Pessoa de Meia-Idade , Neurônios/metabolismo
7.
J Natl Black Nurses Assoc ; 23(1): 8-15, 2012 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-23061164

RESUMO

While administrators of pre-elementary school programs throughout the country recognize the importance of screening and monitoring body mass and hypertension in early childhood populations, typically, few efforts are undertaken to systematically, retrospectively, and critically review them. A retrospective cross-sectional analysis of measures, reflective of body mass and blood pressure, collected from a targeted group of 10 urban pre-elementary schools in the Midwestern region of the country, was therefore undertaken. Overweight, obesity, and blood pressure readings suggestive of pre-hypertension and hypertension were found to be more prevalent among both boys and children whose school and residences were located in low-income neighborhoods. More surprising, however, was the lack of documentation of notations in their health records about their BMI status, blood pressure status, and/or need for re-assessment, referral, or follow-up.


Assuntos
Hipertensão/etnologia , Hipertensão/prevenção & controle , Programas de Rastreamento/organização & administração , Obesidade/etnologia , Obesidade/prevenção & controle , Pré-Escolar , Estudos Transversais , Feminino , Humanos , Masculino , Meio-Oeste dos Estados Unidos/epidemiologia , Sobrepeso/etnologia , Sobrepeso/prevenção & controle , Prevalência , Avaliação de Programas e Projetos de Saúde , Estudos Retrospectivos , Saúde da População Urbana
8.
Clin Case Rep ; 10(12): e6717, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36514473

RESUMO

Takotsubo cardiomyopathy (TC), an acute cardiac event is often associated with acute emotional stress, usually in the setting of cardiovascular risk factors. This case report attempts to review one of the triggers of TC beer potomania-induce hyponatremia with imaging findings that shows the link between severe hyponatremia and TC.

9.
Tissue Eng Part B Rev ; 28(2): 336-350, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-33559514

RESUMO

Heart disease is one of the largest burdens to human health worldwide and has very limited therapeutic options. Engineered three-dimensional (3D) vascularized cardiac tissues have shown promise in rescuing cardiac function in diseased hearts and may serve as a whole organ replacement in the future. One of the major obstacles in reconstructing these thick myocardial tissues to a clinically applicable scale is the integration of functional vascular networks capable of providing oxygen and nutrients throughout whole engineered constructs. Without perfusion of oxygen and nutrient flow throughout the entire engineered tissue not only is tissue viability compromised, but also overall tissue functionality is lost. There are many supporting technologies and approaches that have been developed to create vascular networks such as 3D bioprinting, co-culturing hydrogels, and incorporation of soluble angiogenic factors. In this state-of-the-art review, we discuss some of the most current engineered vascular cardiac tissues reported in the literature and future directions in the field. Impact statement The field of cardiac tissue engineering is rapidly evolving and is now closer than ever to having engineered tissue models capable of predicting preclinical responses to therapeutics, modeling diseases, and being used as a means of rescuing cardiac function following injuries to the native myocardium. However, a major obstacle of engineering thick cardiac tissue remains to be the integration of functional vasculature. In this review, we highlight seminal and recently published works that have influenced and pushed the field of cardiac tissue engineering toward achieving vascularized functional tissues.


Assuntos
Bioimpressão , Bioimpressão/métodos , Humanos , Hidrogéis , Miocárdio , Oxigênio , Engenharia Tecidual/métodos
10.
Artigo em Inglês | MEDLINE | ID: mdl-35564513

RESUMO

The COVID-19 pandemic impacted mental health. Growing research has identified the mental health benefits of nature contact, including gardening. We used a cross-sectional survey to investigate the association between gardening and other outdoor activities with anxiety among U.S. adults. The RANG (Reducing Anxiety with Nature and Gardening) survey was distributed online from June−September 2020 through social media (Twitter and Facebook) and a national Master Gardeners listserv. Survey questions captured demographics, COVID-19 experiences, gardening, outdoor activities, and anxiety using the Generalized Anxiety Disorder 7-item scale. Data were analyzed using chi-square, Fisher's exact, and Kruskal−Wallis tests, as well as logistic regression. Among participants, 46% reported anxiety symptoms. Participants who had gardened ≥ 15 years and those gardening > 8 h over two weeks had lower anxiety scores. Spending more time outdoors on weekdays also decreased anxiety scores. After adjusting for covariates, lower odds of anxiety were identified for 50−69 and 70−89-year-olds vs. 18−29-year-olds; males vs. females; and Texas vs. Maryland residents. These findings confirm increased anxiety during the COVID-19 pandemic and suggest that sustained gardening and other outdoor activities could help reduce anxiety.


Assuntos
COVID-19 , Adulto , Ansiedade/epidemiologia , Ansiedade/psicologia , Transtornos de Ansiedade , COVID-19/epidemiologia , COVID-19/prevenção & controle , Estudos Transversais , Feminino , Jardinagem , Humanos , Masculino , Pandemias/prevenção & controle , SARS-CoV-2
11.
BMJ Open ; 12(2): e052911, 2022 02 16.
Artigo em Inglês | MEDLINE | ID: mdl-35172999

RESUMO

OBJECTIVE: This paper evaluates the application of a natural language processing (NLP) model for extracting clinical text referring to interpersonal violence using electronic health records (EHRs) from a large mental healthcare provider. DESIGN: A multidisciplinary team iteratively developed guidelines for annotating clinical text referring to violence. Keywords were used to generate a dataset which was annotated (ie, classified as affirmed, negated or irrelevant) for: presence of violence, patient status (ie, as perpetrator, witness and/or victim of violence) and violence type (domestic, physical and/or sexual). An NLP approach using a pretrained transformer model, BioBERT (Bidirectional Encoder Representations from Transformers for Biomedical Text Mining) was fine-tuned on the annotated dataset and evaluated using 10-fold cross-validation. SETTING: We used the Clinical Records Interactive Search (CRIS) database, comprising over 500 000 de-identified EHRs of patients within the South London and Maudsley NHS Foundation Trust, a specialist mental healthcare provider serving an urban catchment area. PARTICIPANTS: Searches of CRIS were carried out based on 17 predefined keywords. Randomly selected text fragments were taken from the results for each keyword, amounting to 3771 text fragments from the records of 2832 patients. OUTCOME MEASURES: We estimated precision, recall and F1 score for each NLP model. We examined sociodemographic and clinical variables in patients giving rise to the text data, and frequencies for each annotated violence characteristic. RESULTS: Binary classification models were developed for six labels (violence presence, perpetrator, victim, domestic, physical and sexual). Among annotations affirmed for the presence of any violence, 78% (1724) referred to physical violence, 61% (1350) referred to patients as perpetrator and 33% (731) to domestic violence. NLP models' precision ranged from 89% (perpetrator) to 98% (sexual); recall ranged from 89% (victim, perpetrator) to 97% (sexual). CONCLUSIONS: State of the art NLP models can extract and classify clinical text on violence from EHRs at acceptable levels of scale, efficiency and accuracy.


Assuntos
Serviços de Saúde Mental , Processamento de Linguagem Natural , Registros Eletrônicos de Saúde , Eletrônica , Humanos , Extratos Vegetais , Violência
12.
ACS Appl Mater Interfaces ; 14(34): 38541-38549, 2022 Aug 31.
Artigo em Inglês | MEDLINE | ID: mdl-35984038

RESUMO

Poly(dimethylsiloxane) (PDMS) is a commonly used polymer in organ-on-a-chip devices and microphysiological systems. However, due to its hydrophobicity and permeability, it absorbs drug compounds, preventing accurate drug screening applications. Here, we developed an effective and facile method to prevent the absorption of drugs by utilizing a PDMS-PEG block copolymer additive and drug pretreatment. First, we incorporated a PDMS-PEG block copolymer into PDMS to address its inherent hydrophobicity. Next, we addressed the permeability of PDMS by eliminating the concentration gradient via pretreatment of the PDMS with the drug prior to experimentally testing drug absorption. The combined use of a PDMS-PEG block copolymer with drug pretreatment resulted in a mean reduction of drug absorption by 91.6% in the optimal condition. Finally, we demonstrated that the proposed method can be applied to prevent drug absorption in a PDMS-based cardiac microphysiological system, enabling more accurate drug studies.


Assuntos
Dimetilpolisiloxanos , Polímeros , Avaliação Pré-Clínica de Medicamentos , Interações Hidrofóbicas e Hidrofílicas , Permeabilidade
13.
Int J Cancer ; 128(3): 597-607, 2011 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-20473864

RESUMO

We previously reported decreased lymphocyte proliferative responses among older women with persistent human papillomavirus (HPV) infection. To characterize the phenotype of peripheral lymphocytes associated with persistent HPV infection, we evaluated the expression of different cell surface markers in peripheral blood mononuclear cells (PBMCs) from a case-control study within a 10,049 woman population-based cohort study in Guanacaste, Costa Rica. Women in the cohort aged 46-74 and with HPV results at their 5th year anniversary visit were considered, and all women (n = 87) with persistent HPV infections, all women (n = 196) with transient HPV infections and a random sample of HPV DNA-negative women (n = 261) frequency-matched to cases on age were selected for this study. A median of 3 years after the case-control matching visit, cervical cells were collected for liquid-based cytology and repeat HPV DNA genotyping. Blood was obtained from which PBMCs were extracted and cryopreserved for immunological phenotyping via flow cytometry. Significant increases in risk of HPV persistence were observed for 3 marker subsets indicative of immune cell activation/differentiation. Relative risk estimates were 5.4 (95% CI = 2.2-13.3) for CD69(+)CD4(+), 2.6 (95% CI = 1.2-5.9) for HLADR(+)CD3(+)CD4(+) and 2.3 (95% CI = 1.1-4.7) for CD45RO(+)CD27(-)CD8(+). A significant decrease in HPV persistence was observed for a subset marker indicative of an immature, undifferentiated memory state CD45RO(+)CD27(+)CD4(+) (OR = 0.36; 95% CI = 0.17-0.76). Adjustment for these markers only partially explained the previously reported association between decreased lymphoproliferative responses and persistent HPV infection. Whether phenotypic alterations observed predispose to HPV persistence or result from it should be the focus of future studies.


Assuntos
Infecções por Papillomavirus/imunologia , Linfócitos T/imunologia , Adulto , Idoso , Alphapapillomavirus/genética , Alphapapillomavirus/isolamento & purificação , Antígenos CD/análise , Antígenos CD/imunologia , Doença Crônica , Estudos de Coortes , Colposcopia , DNA Viral/análise , Feminino , Humanos , Imunofenotipagem , Pessoa de Meia-Idade , Reação em Cadeia da Polimerase/métodos , Infecções Tumorais por Vírus/genética , Displasia do Colo do Útero/complicações , Displasia do Colo do Útero/genética
14.
Cytokine ; 53(3): 282-5, 2011 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-21167737

RESUMO

We observed diminished lymphoproliferation to multiple stimuli in older women with persistent cervical human papillomavirus (HPV) infection. Adipokines are a class of inflammatory cytokines that are altered in some persistent infections. The objective was to compare the level of adipokines and inflammatory cytokines in heparinized plasma from women with persistent HPV cervical infection (Cases, N=50, oversampled for their weak lymphoproliferation responses) with women with no evidence of persistent HPV cervical infection (Controls, N=50, oversampled for their strong lymphoproliferation responses). Plasma samples were analyzed with multiplex assays for adipokines and inflammatory cytokines. Cases had significantly elevated plasma levels of resistin (p<0.0001) and sFas (p=0.0038) as compared to controls. Risk of persistent HPV infection increased significantly with increasing levels of resistin and 8Fas. This is the first study to demonstrate elevated levels of resistin and sFas in HPV persistently infected, older women with decreased immune function expanding the understanding of the systemic inflammation and immune alterations in individuals persistently infected with HPV. Further studies within a larger cohort are needed to define the generalities of these findings and any role adipokines have in persistent HPV infection.


Assuntos
Adipocinas/sangue , Mediadores da Inflamação/sangue , Infecções por Papillomavirus/sangue , Displasia do Colo do Útero/sangue , Neoplasias do Colo do Útero/sangue , Alphapapillomavirus/genética , Feminino , Genótipo , Humanos , Interleucina-8/sangue , Pessoa de Meia-Idade , Infecções por Papillomavirus/virologia , Resistina/sangue , Estatísticas não Paramétricas , Fator de Necrose Tumoral alfa/sangue , Neoplasias do Colo do Útero/virologia , Receptor fas/sangue , Displasia do Colo do Útero/virologia
15.
Epilepsy Res ; 172: 106591, 2021 05.
Artigo em Inglês | MEDLINE | ID: mdl-33711711

RESUMO

BACKGROUND: The cognitive impacts of resective surgery for epilepsy have been well-studied. While seizure outcomes for less invasive, neuromodulatory treatments are promising, there is a paucity of data for cognitive outcomes. METHODS: Medline, EMBASE, and the Cochrane Library were searched on November 2019. Inclusion criteria were studies reporting cognitive outcomes following chronic (>6 months) vagus nerve stimulation (VNS), deep brain stimulation (DBS) and responsive neurostimulation (RNS) for epilepsy in at least five patients. Studies reporting acute on-off effects of stimulation were also included. Studies were screened, extracted of data, and assessed for bias using the Joanna Briggs Institute Critical Appraisal Tools by two independent reviewers. Prospero ID: CRD42020184432. RESULTS: Of 8443 studies screened, 29 studies were included. Nineteen investigated the effects of chronic stimulation (11 VNS, 6 DBS, 2 RNS): 10 (53 %) reported no change compared to preoperative baseline; 8 (42 %) reported some improvement in one or more cognitive domain; 1 (5%) reported decline. Ten investigated the effects of acute stimulation (5 VNS, 5 DBS): 3 (30 %) reported no change; 4 reported improvement (40 %); 3 (30 %) reported decline. Eight (28 %) did not report statistical analysis. CONCLUSIONS: Long-term cognitive outcomes are at least stable following VNS, DBS and RNS. Acute effects of stimulation are less clear. However, data are limited by number, size, and quality. More robust evidence is needed to properly assess the cognitive effects of each of these treatments.


Assuntos
Estimulação Encefálica Profunda , Epilepsia , Estimulação do Nervo Vago , Cognição , Epilepsia/terapia , Humanos , Convulsões , Resultado do Tratamento
16.
Front Endocrinol (Lausanne) ; 12: 637691, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33790865

RESUMO

The role G-protein coupled estrogen receptor (GPER) plays in vertebrate reproduction remains controversial. To investigate GPER's reproductive role, we generated a gper zebrafish mutant line (gper-/- ) using TALENs. Gper mutant females exhibited reduced fertility with a 40.85% decrease in embryo production which was associated with a significant decrease in the number of Stage V (730-750 µm) ovulated oocytes. Correspondingly, the number of early vitellogenic follicles (Stage III, 400-450 µm) in gper-/- ovaries was greater than that in wildtypes (wt), suggesting that subsequent follicle development was retarded in the gper-/- fish. Moreover, plasma vitellogenin levels were decreased in gper-/- females, and epidermal growth factor receptor (Egfr) expression was lower in Stage III vitellogenic oocytes than in wt counterparts. However, hepatic nuclear estrogen receptor levels were not altered, and estrogen levels were elevated in ovarian follicles. These results suggest that Gper is involved in the control of ovarian follicle development via regulation of vitellogenesis and Egfr expression in zebrafish.


Assuntos
Receptores Acoplados a Proteínas G/genética , Vitelogênese/fisiologia , Proteínas de Peixe-Zebra/genética , Animais , Membrana Celular/metabolismo , Receptores ErbB/metabolismo , Estrogênios/metabolismo , Feminino , Fertilidade , Peixes , Metabolômica/métodos , Mutação , Oócitos/citologia , Oócitos/metabolismo , Folículo Ovariano/metabolismo , Ovulação , Receptores de Estrogênio/metabolismo , Receptores Acoplados a Proteínas G/metabolismo , Vitelogeninas/metabolismo , Peixe-Zebra , Proteínas de Peixe-Zebra/metabolismo
17.
Front Digit Health ; 3: 711941, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34713182

RESUMO

Background: Cognitive impairments are a neglected aspect of schizophrenia despite being a major factor of poor functional outcome. They are usually measured using various rating scales, however, these necessitate trained practitioners and are rarely routinely applied in clinical settings. Recent advances in natural language processing techniques allow us to extract such information from unstructured portions of text at a large scale and in a cost effective manner. We aimed to identify cognitive problems in the clinical records of a large sample of patients with schizophrenia, and assess their association with clinical outcomes. Methods: We developed a natural language processing based application identifying cognitive dysfunctions from the free text of medical records, and assessed its performance against a rating scale widely used in the United Kingdom, the cognitive component of the Health of the Nation Outcome Scales (HoNOS). Furthermore, we analyzed cognitive trajectories over the course of patient treatment, and evaluated their relationship with various socio-demographic factors and clinical outcomes. Results: We found a high prevalence of cognitive impairments in patients with schizophrenia, and a strong correlation with several socio-demographic factors (gender, education, ethnicity, marital status, and employment) as well as adverse clinical outcomes. Results obtained from the free text were broadly in line with those obtained using the HoNOS subscale, and shed light on additional associations, notably related to attention and social impairments for patients with higher education. Conclusions: Our findings demonstrate that cognitive problems are common in patients with schizophrenia, can be reliably extracted from clinical records using natural language processing, and are associated with adverse clinical outcomes. Harvesting the free text from medical records provides a larger coverage in contrast to neurocognitive batteries or rating scales, and access to additional socio-demographic and clinical variables. Text mining tools can therefore facilitate large scale patient screening and early symptoms detection, and ultimately help inform clinical decisions.

18.
Brain Stimul ; 14(2): 230-240, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33418095

RESUMO

BACKGROUND: There is significant evidence for cognitive decline following deep brain stimulation (DBS). Current stimulation paradigms utilize gamma frequency stimulation for optimal motor benefits; however, little has been done to optimize stimulation parameters for cognition. Recent evidence implicates subthalamic nucleus (STN) theta oscillations in executive function, and theta oscillations are well-known to relate to episodic memory, suggesting that theta frequency stimulation could potentially improve cognition in Parkinson's disease (PD). OBJECTIVE: To evaluate the acute effects of theta frequency bilateral STN stimulation on executive function in PD versus gamma frequency and off, as well as investigate the differential effects on episodic versus nonepisodic verbal fluency. METHODS: Twelve patients (all males, mean age 60.8) with bilateral STN DBS for PD underwent a double-blinded, randomized cognitive testing during stimulation at (1) 130-135 Hz (gamma), (2) 10 Hz (theta) and (3) off. Executive functions and processing speed were evaluated using verbal fluency tasks (letter, episodic category, nonepisodic category, and category switching), color-word interference task, and random number generation task. Performance at each stimulation frequency was compared within subjects. RESULTS: Theta frequency significantly improved episodic category fluency compared to gamma, but not compared to off. There were no significant differences between stimulation frequencies in other tests. CONCLUSION: In this pilot trial, our results corroborate the role of theta oscillations in episodic retrieval, although it is unclear whether this reflects direct modulation of the medial temporal lobe and whether similar effects can be found with more canonical memory paradigms. Further work is necessary to corroborate our findings and investigate the possibility of interleaving theta and gamma frequency stimulation for concomitant motor and cognitive effects.


Assuntos
Estimulação Encefálica Profunda , Doença de Parkinson , Núcleo Subtalâmico , Cognição , Humanos , Masculino , Pessoa de Meia-Idade , Testes Neuropsicológicos , Doença de Parkinson/terapia , Projetos Piloto
19.
Catheter Cardiovasc Interv ; 76(6): 804-13, 2010 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-20815043

RESUMO

OBJECTIVES: We examined angiographic and late-term clinical outcomes according to sex in recent percutaneous coronary intervention (PCI) trials involving zotarolimus-eluting stents (ZES). BACKGROUND: Differences in outcome between men and women undergoing PCI have been inconsistently described with bare metal and first-generation drug-eluting stents. METHODS: Clinical and angiographic outcomes among ZES-treated patients were evaluated by sex using propensity score modeling in a patient-level systematic overview of six trials and were also compared to patients receiving bare metal stents (BMS). RESULTS: Among 2,132 patients, 608 were female (28.5%). Compared to men, women were older and more frequently had diabetes, hypertension, and a smaller reference vessel diameter (P < 0.05 for all). For both sexes, the relative reductions in 8-month angiographic binary restenosis and late lumen loss were statistically significant and of similar extent with ZES compared to BMS. By 2 years, treatment with ZES resulted in significantly lower target vessel revascularization (TVR) and target vessel failure (TVF; 10.0% vs. 21.5%, P = 0.0003) among women that paralleled risk reductions for men. However, among ZES-treated patients, 2-year rates of TVR (8.2% vs. 10.4%, P = 0.005) and TVF (9.9% vs. 12.8%, P = 0.004) were significantly lower among women, although rates of death and myocardial infarction were similar. CONCLUSIONS: Despite greater baseline clinical and angiographic risk than men, women undergoing PCI with ZES compared to BMS experienced significant reductions in angiographic restenosis and repeat revascularization yet similar safety. Among all patients treated with ZES, late-term safety and efficacy outcomes are similar, if not lower, among women compared to men.


Assuntos
Angioplastia Coronária com Balão/instrumentação , Fármacos Cardiovasculares/administração & dosagem , Angiografia Coronária , Reestenose Coronária/prevenção & controle , Estenose Coronária/terapia , Stents Farmacológicos , Sirolimo/análogos & derivados , Idoso , Angioplastia Coronária com Balão/efeitos adversos , Angioplastia Coronária com Balão/mortalidade , Ensaios Clínicos como Assunto , Reestenose Coronária/diagnóstico por imagem , Reestenose Coronária/etiologia , Reestenose Coronária/mortalidade , Estenose Coronária/diagnóstico por imagem , Estenose Coronária/mortalidade , Feminino , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Valor Preditivo dos Testes , Pontuação de Propensão , Desenho de Prótese , Estudos Retrospectivos , Medição de Risco , Fatores de Risco , Fatores Sexuais , Sirolimo/administração & dosagem , Fatores de Tempo , Resultado do Tratamento
20.
Artigo em Inglês | MEDLINE | ID: mdl-31083298

RESUMO

African Americans, other minorities and underserved populations are consistently under- represented in clinical trials. Such underrepresentation results in a gap in the evidence base, and health disparities. The ABC Cardiovascular Implementation Study (CVIS) is a comprehensive prospective cohort registry that integrates social determinants of health. ABC CVIS uses real world clinical practice data to address critical gaps in care by facilitating robust participation of African Americans and other minorities in clinical trials. ABC CVIS will include diverse patients from collaborating ABC member private practices, as well as patients from academic health centers and Federally Qualified Health Centers (FQHCs). This paper describes the rationale and design of the ABC CVIS Registry. The registry will: (1) prospectively collect socio-demographic, clinical and biospecimen data from enrolled adults, adolescents and children with prioritized cardiovascular diseases; (2) Evaluate the safety and clinical outcomes of new therapeutic agents, including post marketing surveillance and pharmacovigilance; (3) Support National Institutes of Health (NIH) and industry sponsored research; (4) Support Quality Measures standards from the Center for Medicare and Medicaid Services (CMS) and Commercial Health Plans. The registry will utilize novel data and technology tools to facilitate mobile health technology application programming interface (API) to health system or practice electronic health records (EHR). Long term, CVIS will become the most comprehensive patient registry for underserved diverse patients with cardiovascular disease (CVD) and co morbid conditions, providing real world data to address health disparities. At least 10,000 patients will be enrolled from 50 sites across the United States.


Assuntos
Negro ou Afro-Americano/estatística & dados numéricos , Determinantes Sociais da Saúde/estatística & dados numéricos , Populações Vulneráveis/estatística & dados numéricos , Georgia , Humanos , Estudos Prospectivos , Sistema de Registros
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