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1.
Cerebrovasc Dis ; 42(5-6): 404-414, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27387478

RESUMO

BACKGROUND AND PURPOSE: Thrombin-activatable fibrinolysis inhibitor (TAFI) activation following thrombolysis may affect thrombolysis effectiveness in acute ischemic stroke (AIS). To support this hypothesis, we propose to study the relationship between TAFI consumption, activated/inactivated TAFI (TAFIa/ai) and stroke severity and outcome in 2 groups of AIS patients, one treated and one untreated with intravenous recombinant tissue type plasminogen activator (rt-PA). METHODS: In this prospective, longitudinal, multicenter, observational study, we aimed to study the association between TAFIa/ai and stroke outcome. TAFI levels were sequentially measured in patients treated with intravenous rt-PA thrombolysis (T), and in patients not given any thrombolytic therapy (NT). Baseline reference values were established in healthy subjects matched for age and gender. The National Institutes of Health Stroke Scale (NIHSS) score assessed at baseline and on day 2 was dichotomized into 2 severity groups (0-7 vs. >7). The modified Rankin Scale (mRS) score at day 90 was dichotomized for favorable (0-1) and unfavorable (2-6) outcomes. RESULTS: A total of 109 patients were included, with 41 receiving rt-PA. At admission, patients had higher TAFIa/ai levels than reference. A significant increase in TAFIa/ai levels was observed at the end of thrombolysis (mean change from baseline of 963%) and lasted up to 4 h (191%). Higher TAFIa/ai levels were associated with a more severe day 2 NIHSS score (p = 0.0098 at T2h post thrombolysis) and an unfavorable mRS score from T48h (p = 0.0417) to day 90 (p = 0.0046). In NT patients, higher TAFIa/ai levels at admission were associated with a more severe stroke, as assessed by day 2 NIHSS score (p = 0.0026) and mRS score (p = 0.0003). CONCLUSION: These data demonstrate a consistent relationship between TAFI levels and early clinical severity during rt-PA treatment.


Assuntos
Isquemia Encefálica/tratamento farmacológico , Carboxipeptidase B2/sangue , Fibrinolíticos/administração & dosagem , Acidente Vascular Cerebral/tratamento farmacológico , Terapia Trombolítica , Ativador de Plasminogênio Tecidual/administração & dosagem , Idoso , Idoso de 80 Anos ou mais , Biomarcadores/sangue , Isquemia Encefálica/sangue , Isquemia Encefálica/diagnóstico , Estudos de Casos e Controles , Avaliação da Deficiência , Europa (Continente) , Feminino , Humanos , Infusões Intravenosas , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Índice de Gravidade de Doença , Acidente Vascular Cerebral/sangue , Acidente Vascular Cerebral/diagnóstico , Fatores de Tempo , Resultado do Tratamento
2.
J Genet Couns ; 24(6): 931-44, 2015 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25894096

RESUMO

The complications of neurofibromatosis type 1 (NF1) are widespread, unpredictable and variable and each person's experience of this disorder is unique. However, few studies have addressed the impact of NF1 from an individual's perspective. This qualitative study aims to identify the ways in which NF1 impacts upon affected Australian adults. Sixty adults with NF1, with a range of disease severity and visibility participated in a semi-structured interview about the ways in which NF1 impacted upon their life and health. Data were analyzed using grounded theory methodology. Results indicated that NF1 impacts upon affected adults in five major ways: 1) cosmetic burden of disease 2) learning difficulties 3) concerns about the risk of passing NF1 to offspring 4) uncertain disease progression, and 5) pain. Participants identified the aspects of NF1 that bothered them the most, creating a hierarchy of NF1 concerns within the cohort. Importantly, mildly affected adults shared many of the same concerns as those more severely affected. This study enhances our current understanding of the impact of NF1 in adulthood, and augments existing recommendations for the care of these patients.


Assuntos
Nível de Saúde , Neurofibromatose 1/psicologia , Qualidade de Vida/psicologia , Autoimagem , Adulto , Atitude Frente a Saúde , Austrália , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Neurofibromatose 1/complicações , Comportamento Social
3.
Int J Cancer ; 134(5): 1102-11, 2014 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-23959905

RESUMO

Bladder cancer patients suffer significant treatment failure, including high rates of recurrence and poor outcomes for advanced disease. If mechanisms to improve tumour cell treatment sensitivity could be identified and/or if tumour response could be predicted, it should be possible to improve local-control and survival. Previously, we have shown that radiation-induced DNA damage, measured by alkaline Comet assay (ACA), correlates bladder cancer cell radiosensitivity in vitro. In this study we first show that modified-ACA measures of cisplatin and mitomycin-C-induced damage also correlate bladder cancer cell chemosensitivity in vitro, with essentially the same rank order for chemosensitivity as for radiosensitivity. Furthermore, ACA studies of radiation-induced damage in different cell-DNA substrates (nuclei, nucleoids and intact parent cells) suggest that it is a feature retained in the prepared nucleoids that is responsible for the relative damage sensitivity of bladder cancer cells, suggestive of differences in the organisation of DNA within resistant vs. sensitive cells. Second, we show that ACA analysis of biopsies from bladder tumours reveal that reduced DNA damage sensitivity associates with poorer treatment outcomes, notably that tumours with a reduced damage response show a significant association with local recurrence of non-invasive disease and that reduced damage response was a better predictor of recurrence than the presence of high-risk histology in this cohort. In conclusion, this study demonstrates that mechanisms governing treatment-induced DNA damage are both central to and predictive of bladder cancer cell treatment sensitivity and exemplifies a link between DNA damage resistance and both treatment response and tumour aggression.


Assuntos
Ensaio Cometa/métodos , Dano ao DNA , Neoplasias da Bexiga Urinária/tratamento farmacológico , Linhagem Celular Tumoral , Cisplatino/farmacologia , Humanos , Mitomicina/farmacologia , Resultado do Tratamento , Neoplasias da Bexiga Urinária/genética
4.
BMC Complement Altern Med ; 14: 295, 2014 Aug 09.
Artigo em Inglês | MEDLINE | ID: mdl-25107315

RESUMO

BACKGROUND: Selective Alzheimer Disease Indicator-1 (or Seladin-1) is a multifunctional protein first discovered by downregulation of its expression in Alzheimer's disease. Interestingly, the expression of this protein is upregulated in several cancers, including primary bladder cancer. However, its role in cancer formation has yet to be discovered. Goniothalamin is a natural product that has been demonstrated to induce apoptosis in various cancer cell lines. In this study, we have elucidated the role of Seladin-1 in goniothalamin-induced cytotoxicity towards human urinary bladder cancer cell line RT4. METHODS: The cytotoxicity of goniothalamin in human urinary bladder cancer cell line RT4 was assessed using MTT assay and the mode of cell death was determined by Annexin V-FITC/PI labeling assay. Finally, the expression of Seladin-1 protein in goniothalamin-treated RT4 cells was determined by Western blot. RESULTS: MTT assay showed that the cytotoxicity of goniothalamin on RT4 cells was concentration and time dependent with IC50 values of 61 µM (24 hr), 38 µM (48 hr) and 31 µM for 72 hr, respectively. Cell death induced was confirmed through apoptosis; as assessed using the Annexin V-FITC/PI labeling assay. Furthermore, the involvement of Seladin-1 in goniothalamin-induced apoptosis was evidenced through the cleavage of 60 kDa protein to 40 kDa and 20 kDa. This was followed by a gradual increase of 20 kDa fragment suggesting the involvement of Seladin-1 in goniothalamin-induced apoptosis on RT4 cells. CONCLUSION: This study demonstrates that goniothalamin induce cytotoxicity and apoptosis on RT4 cells. The involvement of Seladin-1 in goniothalamin-induced apoptosis further suggested that Seladin-1 may play a role in the formation of primary bladder cancer.


Assuntos
Antineoplásicos/farmacologia , Apoptose/efeitos dos fármacos , Pironas/farmacologia , Neoplasias da Bexiga Urinária/metabolismo , Linhagem Celular Tumoral , Humanos , Neoplasias da Bexiga Urinária/tratamento farmacológico , Neoplasias da Bexiga Urinária/fisiopatologia
5.
J Mol Cell Cardiol ; 54: 82-9, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23201226

RESUMO

Obesity is a major health issue that impedes the ability of preconditioning and postconditioning to protect the myocardium against infarction secondary to dysregulation of kinase signaling pathways. Moreover, exercise decreases cardiovascular mortality in obese patients but the mechanism remains to be established. Wild-type (WT) and obese (ob/ob) mice were assigned to sedentary conditions or regular treadmill exercise (1h/day, 5 days/7, 4 weeks, 4° slope, 10-30 cm/s) and underwent 30 min of coronary artery occlusion followed by 24h of reperfusion for infarct size measurement. In WT, exercise reduced infarct size by 60% and increased phosphorylation of kinases such as Akt, ERK 1/2, p70S6K, AMPK and GSK3ß. Importantly, the level of corresponding phosphatases PTEN, MKP-3 and PP2C was decreased. Calcium concentration inducing the opening of mitochondrial permeability transition pore (mPTP) was increased by exercise. In ob/ob, regular exercise induced a robust cardioprotection by reducing infarct size (-67%), increasing kinase phosphorylation, decreasing phosphatase levels and improving the resistance to mPTP opening. However exercise did not modify hyperglycemia, hypercholesterolemia, hyperinsulinemia, fat mass and body weight in obese mice. In conclusion, regular exercise induces cardioprotection against myocardial infarction despite obesity and restores pro-survival signaling pathways with simultaneous increase in kinase phosphorylations, decreased levels of phosphatases and increased resistance of mPTP opening, independently from improvement in associated co-morbidities.


Assuntos
Terapia por Exercício , Sistema de Sinalização das MAP Quinases , Infarto do Miocárdio/prevenção & controle , Obesidade/terapia , Adenilato Quinase/metabolismo , Animais , Comorbidade , Fosfatase 6 de Especificidade Dupla/metabolismo , MAP Quinases Reguladas por Sinal Extracelular/metabolismo , Quinase 3 da Glicogênio Sintase/metabolismo , Glicogênio Sintase Quinase 3 beta , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Obesos , Mitocôndrias Cardíacas/metabolismo , Proteínas de Transporte da Membrana Mitocondrial/metabolismo , Poro de Transição de Permeabilidade Mitocondrial , Infarto do Miocárdio/etiologia , Infarto do Miocárdio/patologia , Traumatismo por Reperfusão Miocárdica/etiologia , Traumatismo por Reperfusão Miocárdica/patologia , Traumatismo por Reperfusão Miocárdica/prevenção & controle , Miocárdio/enzimologia , Obesidade/complicações , PTEN Fosfo-Hidrolase/metabolismo , Fosforilação , Processamento de Proteína Pós-Traducional , Proteínas Proto-Oncogênicas c-akt/metabolismo , Proteínas Quinases S6 Ribossômicas 70-kDa/metabolismo
6.
J Mol Cell Cardiol ; 65: 98-104, 2013 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24140799

RESUMO

Remote ischemic preconditioning (RIPC) has emerged as a feasible and attractive therapeutic procedure for heart protection against ischemia/reperfusion (I/R) injury. However, its molecular mechanisms remain poorly understood. Hypoxia inducible factor-1α (HIF-1α) is a transcription factor that plays a key role in the cellular adaptation to hypoxia and ischemia. This study's aim was to test whether RIPC-induced cardioprotection requires HIF-1α upregulation to be effective. In the first study, wild-type mice and mice heterozygous for HIF1a (gene encoding the HIF-1α protein) were subjected to RIPC immediately before myocardial infarction (MI). RIPC resulted in a robust HIF-1α activation in the limb and acute cardioprotection in wild-type mice. RIPC-induced cardioprotection was preserved in heterozygous mice, despite the low HIF-1α expression in their limbs. In the second study, the role of HIF-1α in RIPC was evaluated using cadmium (Cd), a pharmacological HIF-1α inhibitor. Rats were subjected to MI (MI group) or to RIPC immediately prior to MI (R-MI group). Cd was injected 18 0min before RIPC (Cd-R-MI group). RIPC induced robust HIF-1α activation in rat limbs and significantly reduced infarct size (IS). Despite Cd's inhibition of HIF-1α activation, RIPC-induced cardioprotection was preserved in the Cd-R-MI group. RIPC applied immediately prior to MI increased HIF-1α expression and attenuated IS in rats and wild-type mice. However, RIPC-induced cardioprotection was preserved in partially HIF1a-deficient mice and in rats pretreated with Cd. When considered together, these results suggest that HIF-1α upregulation is unnecessary in acute RIPC.


Assuntos
Extremidades/irrigação sanguínea , Extremidades/patologia , Subunidade alfa do Fator 1 Induzível por Hipóxia/metabolismo , Precondicionamento Isquêmico , Animais , Cádmio/farmacologia , Cardiotônicos/metabolismo , Ativação Enzimática/efeitos dos fármacos , Quinase 3 da Glicogênio Sintase/metabolismo , Glicogênio Sintase Quinase 3 beta , Subunidade alfa do Fator 1 Induzível por Hipóxia/antagonistas & inibidores , Subunidade alfa do Fator 1 Induzível por Hipóxia/deficiência , Masculino , Camundongos , Infarto do Miocárdio/patologia , Miocárdio/enzimologia , Miocárdio/patologia , Fosforilação/efeitos dos fármacos , Ratos , Ratos Sprague-Dawley
7.
Circulation ; 125(1): 140-9, 2012 Jan 03.
Artigo em Inglês | MEDLINE | ID: mdl-22086875

RESUMO

BACKGROUND: Increased permeability, predominantly controlled by endothelial junction stability, is an early event in the deterioration of vascular integrity in ischemic disorders. Hemorrhage, edema, and inflammation are the main features of reperfusion injuries, as observed in acute myocardial infarction (AMI). Thus, preservation of vascular integrity is fundamental in ischemic heart disease. Angiopoietins are pivotal modulators of cell-cell junctions and vascular integrity. We hypothesized that hypoxic induction of angiopoietin-like protein 4 (ANGPTL4) might modulate vascular damage, infarct size, and no-reflow during AMI. METHODS AND RESULTS: We showed that vascular permeability, hemorrhage, edema, inflammation, and infarct severity were increased in angptl4-deficient mice. We determined that decrease in vascular endothelial growth factor receptor 2 (VEGFR2) and VE-cadherin expression and increase in Src kinase phosphorylation downstream of VEGFR2 were accentuated after ischemia-reperfusion in the coronary microcirculation of angptl4-deficient mice. Both events led to altered VEGFR2/VE-cadherin complexes and to disrupted adherens junctions in the endothelial cells of angptl4-deficient mice that correlated with increased no-reflow. In vivo injection of recombinant human ANGPTL4 protected VEGF-driven dissociation of the VEGFR2/VE-cadherin complex, reduced myocardial infarct size, and the extent of no-reflow in mice and rabbits. CONCLUSIONS: These data showed that ANGPTL4 might constitute a relevant target for therapeutic vasculoprotection aimed at counteracting the effects of VEGF, thus being crucial for preventing no-reflow and conferring secondary cardioprotection during AMI.


Assuntos
Angiopoietinas/uso terapêutico , Endotélio Vascular/metabolismo , Infarto do Miocárdio/metabolismo , Infarto do Miocárdio/prevenção & controle , Fenômeno de não Refluxo/metabolismo , Fenômeno de não Refluxo/prevenção & controle , Proteína 4 Semelhante a Angiopoietina , Angiopoietinas/deficiência , Animais , Cardiotônicos/metabolismo , Cardiotônicos/uso terapêutico , Células Cultivadas , Endotélio Vascular/citologia , Endotélio Vascular/patologia , Humanos , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Camundongos Transgênicos , Infarto do Miocárdio/patologia , Miócitos Cardíacos/metabolismo , Coelhos , Distribuição Aleatória
8.
Disabil Rehabil ; 45(11): 1784-1795, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-35576174

RESUMO

PURPOSE: Employment outcomes for individuals on the autism spectrum may be contingent upon employers' knowledge of autism and provision of appropriate workplace supports. We aimed to understand the organizational factors that influenced the organizational socialization of autistic employees. MATERIALS AND METHODS: We wrote nine case histories based on interviews from managers, autistic employees, and job coaches. Intra-case analysis, then cross-case analysis, provided an understanding of organizational factors that lead to sustained employment of autistic employees. RESULTS: The quality of the relationship between managers and autistic employees was consistently seen as the key facilitator of organizational socialization and positive employment outcomes of autistic employees. These relationships, however, relied on the skilled facilitation of the job coach during each stage of the employment cycle (hiring, on-boarding, training, performance management), as they had an important role in building a mutual understanding between supervisors and employees. As such, our study draws upon and contributes to leader-member exchange theory. CONCLUSIONS: Consistent with prior research, our study shows the importance of high-quality relationships between supervisors and supervisees for positive employment outcomes of autistic employees in organization but adds skilled communication facilitation as a novel antecedent to leader-member exchange, as a potentially key factor for autistic employees. Implications for rehabilitationThe relationship between the a manager and their employee is an important factor in effective organizational socialization and workplace outcomes for autistic employees.Job coaches can play a crucial role in building mutual understanding and high-quality relationships between managers and employees.Job coaches can support the inclusion of autistic employees by illustrating the multi-faceted socioemotional performance benefits over the longer term.


Assuntos
Transtorno Autístico , Humanos , Emprego/psicologia , Local de Trabalho , Condições de Trabalho , Seleção de Pessoal
9.
mSystems ; 8(6): e0084123, 2023 Dec 21.
Artigo em Inglês | MEDLINE | ID: mdl-37882535

RESUMO

IMPORTANCE: The food industry has always used many strains of microorganisms including fungi in their production processes. These strains have been widely characterized for their biotechnological value, but we still know very little about their interaction capacities with the host at a time when the intestinal microbiota is at the center of many pathologies. In this study, we characterized five yeast strains from food production which allowed us to identify two new strains with high probiotic potential and beneficial effects in a model of intestinal inflammation.


Assuntos
Kluyveromyces , Probióticos , Candida , Inflamação , Probióticos/uso terapêutico
10.
Transplant Cell Ther ; 29(8): 510.e1-510.e9, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-37169289

RESUMO

Hematopoietic stem cell transplantation (HSCT) is an effective therapy for acute leukemia (AL). Relapse represents the main cause of mortality. Isolated extramedullary relapse (iEMR) is atypical and has been related to better outcomes. Here we describe the clinical characteristics and outcomes of AL relapse after HSCT in our study population and analyze the impacts of different types of relapse on survival outcomes. This retrospective, multicenter study included 124 patients age ≥15 years with AL who underwent HSCT between 2004 and 2019. At diagnosis, 66.1% of the patients had lymphocytic AL, 19.7% presented with high-risk features, and 18.5% had extramedullary disease (EMD). At HSCT, 83.1% of the patients were in complete remission (CR), and 44.8% had negative measurable residual disease (MRD). The vast majority of donors were related (96%), including 48.4% HLA-matched and 47.6% haploidentical. Myeloablative conditioning was provided to 80.6% of patients. The median overall survival (OS) was 15 months (95% confidence interval [CI] 9.9 to 20.1 months). Factors associated with improved OS were adolescent and young adult (AYA) patient (P = .035), first or second CR (P = .026), and chronic graft-versus-host disease (GVHD) (P < .001). Acute GVHD grade III-IV (P = .009) was associated with increased mortality. The median relapse-free survival was 13 months (95% CI, 7.17 to 18.8 months); early disease status (P = .017) and chronic GVHD (P < .001) had protective roles. Sixty-eight patients (55%) relapsed after HSCT, with a median time to relapse of 6 months (95% CI, 3.6 to 8.4 months). iEMR was reported in 16 patients (23.5%). The most commonly involved extramedullary sites were the central nervous system and skin. Compared to patients with bone marrow relapse, all patients with iEMR had a diagnosis of acute lymphoid leukemia (P = .008), and 93.8% belonged to the AYA group; regarding pre-HSCT characteristics, iEMR patients had higher rates of negative MRD (P = .06) and a history of EMD (P = .009). Seventy-seven percent of relapsed patients received additional treatment with curative intent. The median OS after relapse (OSr) was 4 months (95% CI, 2.6 to 5.4 months). Factors related to increased OSr included lymphoid phenotype (P = .03), iEMR (P = .0042), late relapse (≥6 months) (P = .014), receipt of systemic therapy including second HSCT (P < .001), and response to therapy (P < .001). Rates of relapse and iEMR were higher than those previously reported in other studies. Advanced disease, reduced-intensity conditioning, and a diminished graft-versus-leukemia effect were factors influencing these findings. At relapse, presenting with iEMR after 6 months and receiving intensive therapy with adequate response were associated with better outcomes. Our results strongly suggest that a personalized approach to treating patients with HSCT is needed to counterbalance specific adverse factors and can positively impact clinical outcomes.


Assuntos
Doença Enxerto-Hospedeiro , Transplante de Células-Tronco Hematopoéticas , Leucemia Mieloide Aguda , Humanos , Doença Aguda , Doença Crônica , Doença Enxerto-Hospedeiro/etiologia , Doença Enxerto-Hospedeiro/terapia , Transplante de Células-Tronco Hematopoéticas/efeitos adversos , América Latina , Leucemia Mieloide Aguda/terapia , Recidiva , Estudos Retrospectivos , Adolescente , Adulto Jovem
11.
Blood ; 115(10): 2008-13, 2010 Mar 11.
Artigo em Inglês | MEDLINE | ID: mdl-20065293

RESUMO

During platelet activation, phosphoinositide 3-kinases (PI3Ks) produce lipid second messengers participating in the regulation of functional responses. Here, we generated a megakaryocyte-restricted p110beta null mouse model and demonstrated a critical role of PI3Kbeta in platelet activation via an immunoreceptor tyrosine-based activation motif, the glyco-protein VI-Fc receptor gamma-chain complex, and its contribution in response to G-protein-coupled receptors. Interestingly, the production of phosphatidylinositol 3,4,5-trisphosphate and the activation of protein kinase B/Akt were strongly inhibited in p110beta null platelets stimulated either via immunoreceptor tyrosine-based activation motif or G-protein-coupled receptors. Functional studies showed an important delay in fibrin clot retraction and an almost complete inability of these platelets to adhere onto fibrinogen under flow condition, suggesting that PI3Kbeta is also acting downstream of alpha(IIb)beta(3). In vivo studies showed that these mice have a normal bleeding time and are not protected from acute pulmonary thromboembolism but are resistant to thrombosis after FeCl(3) injury of the carotid, suggesting that PI3Kbeta is a potential target for antithrombotic drugs.


Assuntos
Plaquetas/metabolismo , Proteína Oncogênica v-akt/metabolismo , Fosfatidilinositol 3-Quinases/genética , Fosfatidilinositol 3-Quinases/fisiologia , Trombose/genética , Animais , Tempo de Sangramento , Plaquetas/enzimologia , Plaquetas/patologia , Linhagem da Célula/genética , Células Cultivadas , Cloretos , Classe I de Fosfatidilinositol 3-Quinases , Modelos Animais de Doenças , Ativação Enzimática/genética , Compostos Férricos , Deleção de Genes , Predisposição Genética para Doença , Isoenzimas/genética , Megacariócitos/metabolismo , Megacariócitos/fisiologia , Camundongos , Camundongos Transgênicos , Fosfatos de Fosfatidilinositol/metabolismo , Agregação Plaquetária/genética , Trombose/induzido quimicamente , Trombose/enzimologia , Trombose/patologia
12.
Psychol Sci ; 23(10): 1137-44, 2012 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-22972907

RESUMO

Self-control is critical for achievement and well-being. However, people's capacity for self-control is limited and becomes depleted through use. One prominent explanation for this depletion posits that self-control consumes energy through carbohydrate metabolization, which further suggests that ingesting carbohydrates improves self-control. Some evidence has supported this energy model, but because of its broad implications for efforts to improve self-control, we reevaluated the role of carbohydrates in self-control processes. In four experiments, we found that (a) exerting self-control did not increase carbohydrate metabolization, as assessed with highly precise measurements of blood glucose levels under carefully standardized conditions; (b) rinsing one's mouth with, but not ingesting, carbohydrate solutions immediately bolstered self-control; and (c) carbohydrate rinsing did not increase blood glucose. These findings challenge metabolic explanations for the role of carbohydrates in self-control depletion; we therefore propose an alternative motivational model for these and other previously observed effects of carbohydrates on self-control.


Assuntos
Carboidratos da Dieta/administração & dosagem , Carboidratos da Dieta/sangue , Controle Interno-Externo , Motivação/fisiologia , Adolescente , Adulto , Análise de Variância , Biomarcadores/sangue , Glicemia/metabolismo , Metabolismo Energético/fisiologia , Feminino , Humanos , Masculino , Desempenho Psicomotor/fisiologia , Estudantes/psicologia , Adulto Jovem
13.
Philos Trans R Soc Lond B Biol Sci ; 377(1853): 20210155, 2022 06 20.
Artigo em Inglês | MEDLINE | ID: mdl-35491594

RESUMO

Floral nectar is prone to colonization by nectar-adapted yeasts and bacteria via air-, rain-, and animal-mediated dispersal. Upon colonization, microbes can modify nectar chemical constituents that are plant-provisioned or impart their own through secretion of metabolic by-products or antibiotics into the nectar environment. Such modifications can have consequences for pollinator perception of nectar quality, as microbial metabolism can leave a distinct imprint on olfactory and gustatory cues that inform foraging decisions. Furthermore, direct interactions between pollinators and nectar microbes, as well as consumption of modified nectar, have the potential to affect pollinator health both positively and negatively. Here, we discuss and integrate recent findings from research on plant-microbe-pollinator interactions and their consequences for pollinator health. We then explore future avenues of research that could shed light on the myriad ways in which nectar microbes can affect pollinator health, including the taxonomic diversity of vertebrate and invertebrate pollinators that rely on this reward. This article is part of the theme issue 'Natural processes influencing pollinator health: from chemistry to landscapes'.


Assuntos
Bactérias , Néctar de Plantas , Animais , Bactérias/metabolismo , Néctar de Plantas/metabolismo , Plantas , Olfato
14.
J Fam Econ Issues ; 43(2): 338-353, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-34248320

RESUMO

The amount of household debt tripled globally over the last decades and a sizable share of individuals and families are overindebted due to mortgages, credit cards, or consumer debt. Yet research on the distribution of debt across families, and potential ripple effects of the psychological burden related to debt on well-being and family relations, remains sparse. Our study aims to fill these gaps by examining the socio-demographic profiles of families that have accumulated household debt and the unique role that the psychological burden related to debt plays on associations between mothers' well-being, parental dynamics, and child adjustment based on the Family Stress Model (FSM). We used representative survey data collected in 2019 from Germany (N = 3271), which is one of the richest economies worldwide, yet about 10% of adults reported to be overindebted. Logistic regression results showed that single mothers were less likely to have debt compared to mothers in two-parent families. However, both single mothers and mothers in stepfamilies with high levels of perceived economic strain were particularly likely to report having debt. Structural equation modeling yielded that the links between the psychological burden of debt, maternal well-being, parental dynamics, and child adjustment were largely in line with the FSM, except for single mothers. We conclude that persisting financial disparities by family structure may be partially fostered by unique characteristics of the German welfare state, such as promoting more a traditional two-parent norm, and discuss our findings in light of practical implications.

15.
J Fungi (Basel) ; 8(9)2022 Aug 23.
Artigo em Inglês | MEDLINE | ID: mdl-36135618

RESUMO

Food processes use different microorganisms, from bacteria to fungi. Yeast strains have been extensively studied, especially Saccharomyces cerevisiae. However, to date, very little is known about the potential beneficial effects of molds on gut health as part of gut microbiota. We undertook a comprehensive characterization of five mold strains, Penicillium camemberti, P. nalgiovense, P. roqueforti, Fusarium domesticum, and Geotrichum candidum used in food processes, on their ability to trigger or protect intestinal inflammation using in vitro human cell models and in vivo susceptibility to sodium dextran sulfate-induced colitis. Comparison of spore adhesion to epithelial cells showed a very wide disparity in results, with F. domesticum and P. roqueforti being the two extremes, with almost no adhesion and 20% adhesion, respectively. Interaction with human immune cells showed mild pro-inflammatory properties of all Penicillium strains and no effect of the others. However, the potential anti-inflammatory abilities detected for G. candidum in vitro were not confirmed in vivo after oral gavage to mice before and during induced colitis. According to the different series of experiments carried out in this study, the impact of the spores of these molds used in food production is limited, with no specific beneficial or harmful effect on the gut.

16.
Cancer Res Commun ; 2(11): 1504-1519, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-36970050

RESUMO

The receptor tyrosine kinase VEGFR-3 plays a crucial role in cancer-induced angiogenesis and lymphangiogenesis, promoting tumor development and metastasis. Here, we report the novel VEGFR-3 inhibitor EVT801 that presents a more selective and less toxic profile than two major inhibitors of VEGFRs (i.e., sorafenib and pazopanib). As monotherapy, EVT801 showed a potent antitumor effect in VEGFR-3-positive tumors, and in tumors with VEGFR-3-positive microenvironments. EVT801 suppressed VEGF-C-induced human endothelial cell proliferation in vitro and tumor (lymph)angiogenesis in different tumor mouse models. In addition to reduced tumor growth, EVT801 decreased tumor hypoxia, favored sustained tumor blood vessel homogenization (i.e., leaving fewer and overall larger vessels), and reduced important immunosuppressive cytokines (CCL4, CCL5) and myeloid-derived suppressor cells (MDSC) in circulation. Furthermore, in carcinoma mouse models, the combination of EVT801 with immune checkpoint therapy (ICT) yielded superior outcomes to either single treatment. Moreover, tumor growth inhibition was inversely correlated with levels of CCL4, CCL5, and MDSCs after treatment with EVT801, either alone or combined with ICT. Taken together, EVT801 represents a promising anti(lymph)angiogenic drug for improving ICT response rates in patients with VEGFR-3 positive tumors. Significance: The VEGFR-3 inhibitor EVT801 demonstrates superior selectivity and toxicity profile than other VEGFR-3 tyrosine kinase inhibitors. EVT801 showed potent antitumor effects in VEGFR-3-positive tumors, and tumors with VEGFR-3-positive microenvironments through blood vessel homogenization, and reduction of tumor hypoxia and limited immunosuppression. EVT801 increases immune checkpoint inhibitors' antitumor effects.


Assuntos
Neoplasias , Receptor 3 de Fatores de Crescimento do Endotélio Vascular , Humanos , Camundongos , Animais , Receptor 3 de Fatores de Crescimento do Endotélio Vascular/uso terapêutico , Neovascularização Patológica/tratamento farmacológico , Neoplasias/tratamento farmacológico , Inibidores da Angiogênese/farmacologia , Inibidores de Proteínas Quinases/uso terapêutico , Imunoterapia , Microambiente Tumoral
17.
Blood ; 114(9): 1884-92, 2009 Aug 27.
Artigo em Inglês | MEDLINE | ID: mdl-19494352

RESUMO

Dasatinib is an oral potent adenosine triphosphate (ATP)-competitive inhibitor of BCR-ABL, cKIT, platelet-derived growth factor receptor, and SRC family kinases (SFKs), which has demonstrated high efficiency in patients with imatinib-resistant chronic myelogenous leukemia. Here, we show that dasatinib weakly affects platelet activation by thrombin or adenosine diphosphate but is a potent inhibitor of platelet signaling and functions initiated by collagen or FcgammaRIIA cross-linking, which require immunoreceptor tyrosine-based activation motif phosphorylation by SFKs. Accordingly, dasatinib treatment rapidly decreases the volume of thrombi formed under arterial flow conditions in whole blood from patients or mice perfused over a matrix of collagen. Moreover, treatment of mice with dasatinib increases the tail bleeding time in a dose-dependent manner. Interestingly, these effects are rapidly reversible after interruption of the treatment. Our data clearly demonstrate that, in contrast to imatinib, dasatinib affects platelet functions in vitro and in vivo, which has important implications in clinic and could explain increased risks of bleeding observed in patients. Moreover, dasatinib efficiently prevents platelet activation mediated by FcgammaRIIA cross-linking and by sera from patients with heparin-induced thrombocytopenia, suggesting that reversible antiplatelet agents acting as ATP-competitive inhibitors of SFKs may be of therapeutic interest in the treatment of this pathology.


Assuntos
Antineoplásicos/farmacologia , Plaquetas/efeitos dos fármacos , Inibidores Enzimáticos/farmacologia , Ativação Plaquetária/efeitos dos fármacos , Proteínas Tirosina Quinases/antagonistas & inibidores , Pirimidinas/farmacologia , Tiazóis/farmacologia , Adulto , Idoso , Animais , Benzamidas , Dasatinibe , Feminino , Humanos , Mesilato de Imatinib , Técnicas In Vitro , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Pessoa de Meia-Idade , Piperazinas/farmacologia
18.
Expert Rev Pharmacoecon Outcomes Res ; 21(4): 785-798, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32686530

RESUMO

Objectives: To estimate the clinical and economic burden of type 2 diabetes (T2D) in established (EST) and emerging markets (EMG).Methods: Three systematic literature reviews were conducted in MEDLINE and Embase to capture all relevant publications reporting 1) the epidemiology of T2D and complications in T2D and 2) the economic burden of T2D and associated complications.Results: In total, 294 studies were included in this analysis. Evidence indicates a high and increasing overall prevalence of T2D globally, ranging up to 23% in EMG markets and 14% in EST markets. Undiagnosed cases were higher in EMG versus EST markets (up to 67% vs 38%), potentially due to a lack of education and disease awareness in certain regions, that could lead to important clinical and economic consequences. Poor glycemic control was associated with the development of several complications (e.g. retinopathy, cardiovascular diseases and nephropathy) that increase the risk of morbidity and mortality. Direct costs were up to 9-fold higher in patients with vs without T2D-related complications.Conclusions: The burden of T2D, related complications and inherent costs are higher in emerging versus established market countries. This review explores potential strategies to reduce costs and enhance outcomes of T2D treatment in developing countries.


Assuntos
Efeitos Psicossociais da Doença , Complicações do Diabetes/economia , Diabetes Mellitus Tipo 2/economia , Países Desenvolvidos , Países em Desenvolvimento , Complicações do Diabetes/epidemiologia , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/epidemiologia , Saúde Global , Custos de Cuidados de Saúde/estatística & dados numéricos , Humanos , Prevalência
19.
J Child Neurol ; 36(8): 601-609, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-33439066

RESUMO

BACKGROUND: Clinical measures after birth and studies such as electroencephalogram (EEG) and brain imaging do not fully predict neurodevelopmental outcomes of infants with hypoxic-ischemic encephalopathy. Early detection of adverse neurologic outcomes, and cerebral palsy in particular, in high-risk infants is essential for ensuring timely management. The General Movements Assessment is a tool that can be used in the early detection of cerebral palsy in infants with brain injury. The majority of studies on the General Movements Assessment in the late preterm and term population were performed prior to the introduction of therapeutic hypothermia. AIMS: To apply the General Movements Assessment in late preterm and term infants with hypoxic-ischemic encephalopathy (including those who received therapeutic hypothermia), to determine if clinical markers of hypoxic-ischemic encephalopathy predict abnormal General Movements Assessment findings, and to evaluate interrater reliability of the General Movements Assessment in this population. Study design: Pilot prospective cohort study Subjects: We assessed 29 late preterm and full-term infants with mild, moderate, and severe hypoxic-ischemic encephalopathy in Philadelphia, PA. RESULTS: Most infants' general movements normalized by the fidgety age. Only infants with moderate or severe hypoxic-ischemic encephalopathy had abnormal general movements in both the writhing and the fidgety ages (n = 6). Seizure at any point during the initial hospitalization was the clinical sign most predictive of abnormal general movements in the fidgety age (sensitivity 100%, specificity 55%, positive predictive value 40%, negative predictive value 100%). Interrater reliability was greatest during the fidgety age (κ = 0.67). CONCLUSIONS: Seizures were the clinical predictor most closely associated with abnormal findings on the General Movements Assessment. However, clinical markers of hypoxic-ischemic encephalopathy are not fully predictive of abnormal General Movements Assessment findings. Larger future studies are needed to evaluate the associations between the General Movements Assessment and childhood neurologic outcomes in patients with hypoxic-ischemic encephalopathy who received therapeutic hypothermia.


Assuntos
Hipóxia-Isquemia Encefálica/complicações , Hipóxia-Isquemia Encefálica/fisiopatologia , Comportamento do Lactente/fisiologia , Movimento/fisiologia , Convulsões/complicações , Convulsões/fisiopatologia , Estudos de Coortes , Feminino , Humanos , Recém-Nascido , Masculino , Projetos Piloto , Valor Preditivo dos Testes , Estudos Prospectivos , Reprodutibilidade dos Testes
20.
Am J Obstet Gynecol MFM ; 3(6): 100450, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34325015

RESUMO

BACKGROUND: Randomized controlled trials are considered the highest level of evidence but fewer than half are reproducible. A rigorous methodology improves trial quality, but reproducibility may be limited by a lack of transparency in reporting. The Consolidated Standards of Reporting Trials guidelines define reporting standards, and pretrial registration requires a predefined methodology and predefined outcomes. OBJECTIVE: We evaluated obstetrics and gynecology trials published in 6 journals in terms of their adherence to the Consolidated Standards of Reporting Trials guidelines. Second, we evaluated pretrial registration compliance and concordance between the registry and publication. Furthermore, we evaluated the differences in trial characteristics among randomized controlled trials with the highest level of compliance and those with lower levels of compliance and adherence to guidelines by journal type. STUDY DESIGN: This was a cross-sectional study of obstetrics and gynecology trials published between 2017 and 2019 in 6 journals (American Journal of Obstetrics & Gynecology, BJOG: An International Journal of Obstetrics and Gynaecology, Obstetrics & Gynecology, The Journal of the American Medical Association, The Lancet, and The New England Journal of Medicine). Randomized controlled trials were identified via PubMed and manual journal archive searches. The primary outcome was adequate compliance with the Consolidated Standards of Reporting Trials guidelines defined as ≥80% of the checklist items present. Secondary outcomes included completion of pretrial registration and concordance between the pretrial registration and publication in terms of the outcomes and sample size. We compared the characteristics between trials with adequate compliance and those with inadequate compliance. Secondary analyses included comparisons of characteristics of the trials in the top quartile for compliance with the Consolidated Standards of Reporting Trials guidelines with those of the trials in lower quartiles and compliance with guidelines in obstetrics-gynecology vs non-obstetrics-gynecology journals. In an exploratory analysis, trends in compliance with the Consolidated Standards of Reporting Trials guidelines across the study period were assessed. A post hoc sensitivity analysis evaluated the outcomes after the exclusion of 2 retracted trials. RESULTS: Of the 170 trials included, 80% (95% confidence interval, 74%-86%) were adequately compliant with the Consolidated Standards of Reporting Trials manuscript guidelines and 66% (95% confidence interval, 59%-73%) were compliant with the abstract guidelines. Nearly all trials (98%) reported pretrial registration. Concordance between pretrial registration and publication in terms of the primary outcomes was identified for 77% of the trials, concordance in terms of the secondary outcomes was observed in 32% of the trials, and concordance in terms of sample size was observed in 60% of the trials. Trials with adequate compliance were more likely to be preregistered, include an a priori power calculation, and use an intent to treat analysis. Trials in the top quartile for compliance with the Consolidated Standards of Reporting Trials guidelines were more likely to be multicenter, international, and government funded. More trials from non-obstetrics-gynecology journals were in the top quartile for compliance with the Consolidated Standards of Reporting Trials guidelines than trials from obstetrics-gynecology journals (64.9% vs 25.7%; P<.001). No significant trends in adequate compliance were identified across the study period. Results did not differ significantly in the sensitivity analysis. CONCLUSION: Of all the trials included, 20% of obstetrics-gynecology trials published in 6 high-impact journals were not compliant with the Consolidated Standards of Reporting Trials guidelines, and there were major discrepancies between pretrial registration and publication. Transparency, reproducibility, and scientific rigor in obstetrics and gynecology trial reporting needs to be improved.


Assuntos
Ginecologia , Obstetrícia , Estudos Transversais , Ensaios Clínicos Controlados Aleatórios como Assunto , Reprodutibilidade dos Testes
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