RESUMO
Pseudomonas aeruginosa grows as a biofilm under many environmental conditions, and the bacterium can disperse from biofilms via highly regulated, dynamic processes. However, physiologic triggers of biofilm dispersal remain poorly understood. Based on prior literature describing dispersal triggered by forms of starvation, we tested bacterial respiratory inhibitors for biofilm dispersal in two models resembling chronic airway infections. Our underlying hypothesis was that respiratory inhibitors could serve as a model for the downstream effects of starvation. We used two experimental conditions. In the first condition, biofilms were grown and dispersed from the surface of airway epithelial cells, and the second condition was a model where biofilms were grown on glass in cell culture media supplemented with host-relevant iron sources. In both biofilm models, the respiratory inhibitors potassium cyanide and sodium azide each triggered biofilm dispersal. We hypothesized that cyanide-induced dispersal was due to respiratory inhibition rather than signaling via an alternative mechanism, and, indeed, if respiration was supported by overexpression of cyanide-insensitive oxidase, dispersal was prevented. Dispersal required the activity of the cyclic-di-GMP regulated protease LapG, reinforcing the role of matrix degradation in dispersal. Finally, we examined the roles of individual phosphodiesterases, previously implicated in dispersal to specific triggers, and found signaling to be highly redundant. Combined deletion of the phosphodiesterases dipA, bifA, and rbdA was required to attenuate the dispersal phenotype. In summary, this work adds insight into the physiology of biofilm dispersal under environmental conditions in which bacterial respiration is abruptly limited. IMPORTANCE The bacterium Pseudomonas aeruginosa grows in biofilm communities that are very difficult to treat in human infections. Growing as a biofilm can protect bacteria from antibiotics and the immune system. Bacteria can leave a biofilm through a process called "dispersal." Dispersed bacteria seed new growth areas and are more susceptible to killing by antibiotics. The triggers for biofilm dispersal are not well understood, and if we understood dispersal better it might lead to the development of new treatments for infection. In this paper, we find that inhibiting P. aeurginosa's ability to respire (generate energy) can trigger dispersal from a biofilm grown in association with human respiratory epithelial cells in culture. The dispersal process requires a protease which is previously known to degrade the biofilm matrix. These findings give us a better understanding of how the biofilm dispersal process works so that future research can discover better ways of clearing bacteria growing in biofilms.
Assuntos
Biofilmes , Pseudomonas aeruginosa , Humanos , Pseudomonas aeruginosa/genética , Diester Fosfórico Hidrolases/metabolismo , Antibacterianos/farmacologia , Peptídeo Hidrolases/metabolismo , Cianetos/metabolismo , Cianetos/farmacologia , Regulação Bacteriana da Expressão Gênica , Proteínas de Bactérias/metabolismo , GMP Cíclico/metabolismoRESUMO
(1) Background: Malaria, a vector-borne infectious disease, is caused by parasites of the Plasmodium genus, responsible for increased extreme morbidity and mortality rates. Despite advances in approved vaccines, full protection has not yet been achieved upon vaccination, thus the development of more potent and safe immuno-stimulating agents for malaria prevention is a goal to be urgently accomplished. We have focused our research on a strategy to identify Plasmodium spp. epitopes by naturally acquired human antibodies and rodent malaria infection models immunized with site-directed non-natural antigens. (2) Methods: Some predictive algorithms and bioinformatics tools resembling different biological environments, such as phagosome-lysosome proteolytic degradation, affinity, and the high frequency of malaria-resistant and -sensitive HLA-II alleles were regarded for the proper selection of epitopes and potential testing. Each epitope's binding profile to both host cells and HLA-II molecules was considered for such initial screening. (3) Results: Once selected, we define each epitope-peptide to be synthesized in terms of size and hydrophobicity, and introduced peptide-bond surrogates and non-natural amino acids in a site-directed fashion, and then they were produced by solid-phase peptide synthesis. Molecules were then tested by their antigenic and immunogenic properties compared to human sera from Colombian malaria-endemic areas. The antigenicity and protective capacity of each epitope-peptide in a rodent infection model were examined. The ability of vaccinated mice after being challenged with P. berghei ANKA and P. yoelii 17XL to control malaria led to the determination of an immune stimulation involving Th1 and Th1/Th2 mechanisms. In silico molecular dynamics and modeling provided some interactions insights, leading to possible explanations for protection due to immunization. (4) Conclusions: We have found evidence for proposing MSP1-modified epitopes to be considered as neutralizing antibody stimulators that are useful as probes for the detection of Plasmodium parasites, as well as for sub-unit components of a site-directed designed malaria vaccine candidate.
Assuntos
Malária Falciparum , Malária , Parasitos , Peptidomiméticos , Humanos , Animais , Camundongos , Epitopos , Proteína 1 de Superfície de Merozoito , Plasmodium falciparum , Antígenos de Protozoários , Proteínas de Protozoários/química , Malária Falciparum/prevenção & controle , Malária/prevenção & controle , Vacinação , Imunoglobulinas , PeptídeosRESUMO
We have sequenced the genomes of 110 small cell lung cancers (SCLC), one of the deadliest human cancers. In nearly all the tumours analysed we found bi-allelic inactivation of TP53 and RB1, sometimes by complex genomic rearrangements. Two tumours with wild-type RB1 had evidence of chromothripsis leading to overexpression of cyclin D1 (encoded by the CCND1 gene), revealing an alternative mechanism of Rb1 deregulation. Thus, loss of the tumour suppressors TP53 and RB1 is obligatory in SCLC. We discovered somatic genomic rearrangements of TP73 that create an oncogenic version of this gene, TP73Δex2/3. In rare cases, SCLC tumours exhibited kinase gene mutations, providing a possible therapeutic opportunity for individual patients. Finally, we observed inactivating mutations in NOTCH family genes in 25% of human SCLC. Accordingly, activation of Notch signalling in a pre-clinical SCLC mouse model strikingly reduced the number of tumours and extended the survival of the mutant mice. Furthermore, neuroendocrine gene expression was abrogated by Notch activity in SCLC cells. This first comprehensive study of somatic genome alterations in SCLC uncovers several key biological processes and identifies candidate therapeutic targets in this highly lethal form of cancer.
Assuntos
Genoma Humano/genética , Genômica , Neoplasias Pulmonares/genética , Mutação/genética , Carcinoma de Pequenas Células do Pulmão/genética , Alelos , Animais , Linhagem Celular Tumoral , Pontos de Quebra do Cromossomo , Ciclina D1/genética , Proteínas de Ligação a DNA/genética , Modelos Animais de Doenças , Feminino , Perfilação da Expressão Gênica , Humanos , Neoplasias Pulmonares/metabolismo , Neoplasias Pulmonares/patologia , Masculino , Camundongos , Sistemas Neurossecretores/metabolismo , Sistemas Neurossecretores/patologia , Proteínas Nucleares/genética , Receptores Notch/genética , Receptores Notch/metabolismo , Proteína do Retinoblastoma/genética , Transdução de Sinais/genética , Carcinoma de Pequenas Células do Pulmão/metabolismo , Carcinoma de Pequenas Células do Pulmão/patologia , Proteína Tumoral p73 , Proteína Supressora de Tumor p53/genética , Proteínas Supressoras de Tumor/genéticaRESUMO
BACKGROUND: Studies of psychological interventions for the prevention of depression have found significant effects in the short-term, but the long-term efficacy has yet to be determined. This study evaluated the 8-year effect of a randomized controlled trial for indicated prevention of depression in female caregivers. METHODS: A total of 173 non-professional female caregivers with subclinical depressive symptoms not meeting criteria for a major depressive episode (MDE) were randomized to either a brief problem-solving intervention (n = 89) or usual-care control group (n = 84). Blinded evaluators conducted an assessment at the 8-year follow-up. The primary outcome was Depression Status, defined by diagnoses of MDE since the 1-year follow-up using the Structured Clinical Interview for the Disorders of the DSM-5. The secondary outcome was current Depressive Symptom Severity. Regression analyses were conducted to evaluate the effect of the intervention on the outcomes. RESULTS: There were no significant differences in the Depression Status between the problem-solving (30.3%) and control groups (26.2%) (adjusted OR 1.25, 95% CI -0.58 to 2.69). Depressive Symptom Severity, however, was significantly lower in the problem-solving group compared to the control group at this follow-up, amounting to a small effect size of Cohen's d = 0.39 (adjusted B = -3.32, p = 0.018). CONCLUSIONS: This is the first study to assess such a long-term follow-up of intervention of indicated prevention of depression. Results seem to indicate that the protective effect of the intervention became smaller over time during follow-up. Future research should replicate these results.
Assuntos
Cuidadores/psicologia , Depressão/prevenção & controle , Resolução de Problemas , Intervenção Psicossocial/métodos , Adulto , Idoso , Estudos de Casos e Controles , Terapia Cognitivo-Comportamental/métodos , Feminino , Seguimentos , Humanos , Pessoa de Meia-IdadeRESUMO
Competence to stand trial (CST) evaluations are a critical part of certain criminal proceedings, and competence-related evaluation and treatment are an increasing part of public mental health services. Whereas more research describes the defendants undergoing competence evaluations, less research has examined the actual reports detailing those competence evaluations. This study reviewed 3,644 court-ordered CST evaluation reports submitted by 126 evaluators in Virginia since Virginia initiated an oversight system allowing for comprehensive review. The base rate of incompetence opinions was 38.8%, but these rates varied significantly across evaluation type (initial versus post-restoration efforts) and evaluators (ranging from 9.1% to 76.8% incompetence rate). Results suggest generally strong compliance with state statutes guiding CST evaluations, but also highlight marked variability in forensic conclusions and reveal a few areas in which some reports fell short of statutory requirements and practice guidelines.
Assuntos
Criminosos/psicologia , Competência Mental/legislação & jurisprudência , Direito Penal , Bases de Dados Factuais , Pessoas com Deficiência , Psiquiatria Legal/métodos , Humanos , Transtornos Mentais/psicologia , VirginiaRESUMO
OBJECTIVE: We examined the prevalence of criminal defendants facing only misdemeanor charges and referred for forensic mental health evaluations of legal sanity (criminal responsibility) in a state-wide sample of sanity reports. We sought to describe this population of defendants, particularly as compared to defendants facing felony charges and referred for evaluation of legal sanity. HYPOTHESES: We hypothesized that, among those referred for sanity evaluations, defendants facing only misdemeanor charges would have higher rates of serious mental illness than would defendants charged with felonies, as evidenced by their mental status during the evaluation and at the time of alleged offenses. We also hypothesized that defendants charged with only misdemeanors would be more often opined insane, as compared to those charged with felonies. METHOD: We reviewed a statewide sample of 926 court-ordered sanity evaluation reports in Virginia and coded numerous variables describing the defendants, sanity evaluation process, resulting reports, and legal opinions offered within the reports. RESULTS: Approximately 22.3% of sanity evaluations involved defendants charged only with misdemeanor offenses. Defendants facing only misdemeanor charges were 1.82 times more likely to be opined insane than were defendants facing only felony charges, primarily due to their increased likelihood of experiencing psychotic symptoms at the time of the offense (1.83 times more likely than defendants facing felony charges). CONCLUSIONS: The merits of pursuing the insanity defense in response to misdemeanor charges are questionable given the cost- and resource-intensive outcomes associated with insanity acquittals. Diversion strategies may be a more efficient response to those defendants with serious mental illness facing only misdemeanor charges. (PsycInfo Database Record (c) 2020 APA, all rights reserved).
Assuntos
Crime/classificação , Criminosos/psicologia , Psiquiatria Legal , Transtornos Mentais/diagnóstico , Avaliação de Sintomas/psicologia , Adulto , Feminino , Humanos , Defesa por Insanidade , Masculino , Serviços de Saúde Mental/legislação & jurisprudência , VirginiaRESUMO
Evaluations of legal sanity are some of the most complex and consequential mental health evaluations that forensic clinicians perform for the courts. Thus, there is strong reason to monitor the wide-scale process and conclusions of sanity evaluations. In this study, we review 1,111 court-ordered sanity evaluation reports submitted by 74 evaluators in Virginia from the first year after the state initiated an oversight system that allowed for such comprehensive review. Overall, the base rate of insanity findings was 16.9%, although base rates of insanity findings among individual evaluators varied from 0% to 50%. Similarly, most evaluators cited the cognitive (rather than volitional) criteria of the insanity defense as the basis for their insanity findings, although evaluators varied in their patterns of citing these underlying insanity criteria. Our review revealed other trends in practice, such as the rarity of psychological testing (2% of cases) and the frequency of conveying conclusions in "ultimate issue" format (76%). Overall, findings reveal that a majority of reports seem reasonably consistent with practice guidelines, but also reveal some idiosyncratic practices or patterns that suggest there is opportunity for improvement.
Assuntos
Defesa por Insanidade/estatística & dados numéricos , Transtornos Mentais/diagnóstico , Psiquiatria Legal , Humanos , Transtornos Mentais/classificação , Transtornos Mentais/psicologia , Transtornos Psicóticos/diagnóstico , Transtornos Psicóticos/epidemiologia , Transtornos Psicóticos/psicologia , Virginia/epidemiologiaRESUMO
OBJECTIVES: The primary aim was to assess the feasibility/acceptability of a preventive cognitive-behavioral intervention implemented via conference call for caregivers. The secondary aim was to conduct a preliminary assessment of the efficacy of the behavioral activation component alone compared to the complete cognitive-behavioral intervention. METHOD: Sixty-one caregivers (mean age 58.4 years) were randomly assigned to a cognitive-behavioral intervention via conference call (CBC, n = 20), a behavioral activation intervention via conference call (BAC, n = 22) or a control group receiving usual care (CG, n = 19). Both interventions consisted of five 90-minute group sessions implemented weekly. RESULTS: Only 6.6% of caregivers discontinued the study. In the CBC and BAC groups, attendance and satisfaction with the intervention were similarly high among both groups. Homework adherence was also high in both groups. At post-treatment, there was a lower incidence of depression in the CBC and BAC groups compared to the CG (0.0% for BAC and CBC vs. 10.5% for CG). The relative risk was 0.0, and number needed to treat was 10 in both groups. Depressive symptoms were significantly reduced in the CBC and BAC groups compared to the CG (d = 2.18 and d = 2.06). CONCLUSION: The results support the feasibility of the intervention. Moreover, the BAC intervention was non-inferior to the CBC intervention for reducing depressive symptoms.
Assuntos
Cuidadores/psicologia , Terapia Cognitivo-Comportamental/métodos , Depressão/prevenção & controle , Idoso , Estudos de Casos e Controles , Depressão/terapia , Estudos de Viabilidade , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Método Simples-Cego , TelefoneRESUMO
OBJECTIVES: To evaluate the efficacy of a cognitive-behavioral intervention for the prevention of depression in caregivers with elevated depressive symptoms through 12 months of follow-up. DESIGN: Randomized controlled trial. SETTING: Community in Galicia (Spain). PARTICIPANTS: 170 caregivers with elevated depressive symptoms. INTERVENTIONS: Caregivers were randomized to a cognitive-behavioral intervention (N = 88), administered to groups of five participants in five weekly 90-min sessions, or to a usual care control group (N = 82). MEASUREMENTS: Major depressive episodes (according to the Structured Clinical Interview for Axis I Disorders of the DSM-IV), depressive symptoms, emotional distress, caregiver burden, pleasant activities, depressive thoughts, social contacts. Trained blinded interviewers conducted assessments at 1, 3, 6, and 12 months of follow-up. RESULTS: At the 12-month follow-up, there was a lower incidence of major depressive episodes in the intervention group compared with the control group (3.4% versus 22.0%). The relative risk was 0.15 (95% CI: 0.05-0.51) and the number needed to treat was 5 (95% CI: 3-11). The time of delay of the depressive episode onset in the intervention group was significant. Caregivers with good compliance to the intervention had a lower incidence of depression. The effects of the intervention on depressive symptoms, emotional distress, and caregiver burden were maintained for 12 months. Younger caregivers were more likely to benefit from the intervention. The change in depressive thoughts mediated the reduction in depressive symptoms. CONCLUSIONS: Depressive episodes can be successfully prevented in caregivers, with long-term effects.
Assuntos
Cuidadores/psicologia , Terapia Cognitivo-Comportamental/métodos , Depressão/prevenção & controle , Transtorno Depressivo Maior/prevenção & controle , Depressão/terapia , Transtorno Depressivo Maior/terapia , Manual Diagnóstico e Estatístico de Transtornos Mentais , Feminino , Seguimentos , Humanos , Modelos Lineares , Masculino , Pessoa de Meia-Idade , Espanha , Fatores de Tempo , Resultado do TratamentoRESUMO
BACKGROUND: Although depression is a common problem in caregivers and there are effective cognitive-behavioral interventions for its prevention, the ability of caregivers to attend these treatments is often limited by logistics. Furthermore, the efficacy of the components of these interventions is unknown. The objectives of this study are to (a) evaluate the efficacy of a telephone-administered cognitive-behavioral intervention to prevent depression with all its components (cognitive and behavioral) and only with behavioral activation, and to (b) analyze the mediators of the change in depressive symptoms. METHODS/DESIGN: A randomized controlled clinical trial was designed to dismantle the components of a cognitive-behavioral intervention. Caregivers with elevated depressive symptoms will be randomly assigned to a cognitive-behavioral intervention, an intervention with only the behavioral activation component, or a usual care control group. Each condition will consist of approximately 60 participants. The two interventions will consist of five sessions lasting 90 min each, applied to groups of about 5 participants at a time via conference call. Trained interviewers, blind to the experimental conditions, will conduct the assessments at the pre-treatment, post-treatment and 1-, 3-, 6- and 12-month follow-ups. DISCUSSION: This study will provide evidence of the efficacy of a cognitive-behavioral intervention to prevent depression in caregivers with elevated depressive symptoms administered via conference call, and on the impact of the behavioral activation component on the overall efficacy of the program. If we find favorable results, it would mean that we have developed a program of prevention of depression of higher clinical utility and efficacy than those currently available, which would make it possible for a large number of caregivers to have access to such resources. TRIAL REGISTRATION: ClinicalTrials.gov: NCT02292394. Registered 6 November 2014.
Assuntos
Cuidadores/psicologia , Terapia Cognitivo-Comportamental/métodos , Depressão/terapia , Transtorno Depressivo Maior/terapia , Psicoterapia Breve/métodos , Depressão/psicologia , Transtorno Depressivo Maior/psicologia , Feminino , Humanos , Masculino , Negativismo , Consulta Remota/métodos , Projetos de Pesquisa , Autoeficácia , Telefone , Resultado do TratamentoRESUMO
Activities designed to be performed outside of the intervention are considered an essential aspect of the effectiveness of cognitive-behavioral therapy. However, these have received little attention in interventions aimed at individuals with subclinical depressive symptoms who do not yet meet diagnostic criteria for depression (indicated prevention). In this study, the completion of tasks given as homework and their relationship with post-treatment depressive symptoms was with relation to an indicated prevention of depression intervention. Eighty-nine female non-professional caregivers recruited from an official registry completed an intervention involving 11 homework tasks. Tasks performed were recorded and depressive symptoms were assessed with the Center for Epidemiologic Studies Depression Scale (CES-D). Among caregivers, 80.9% completed 9-11 tasks. The number of tasks performed was associated with post-treatment depressive symptoms, with 9 being optimal for clinically significant improvement. These findings highlight the relationship between homework and post-treatment depressive symptoms.
Assuntos
Cuidadores/psicologia , Terapia Cognitivo-Comportamental/métodos , Depressão/prevenção & controle , Adulto , Feminino , Humanos , Pessoa de Meia-Idade , Resultado do TratamentoRESUMO
BACKGROUND: In this study we consider DNA sequences as mathematical strings. Total and reduced alignments between two DNA sequences have been considered in the literature to measure their similarity. Results for explicit representations of some alignments have been already obtained. RESULTS: We present exact, explicit and computable formulas for the number of different possible alignments between two DNA sequences and a new formula for a class of reduced alignments. CONCLUSIONS: A unified approach for a wide class of alignments between two DNA sequences has been provided. The formula is computable and, if complemented by software development, will provide a deeper insight into the theory of sequence alignment and give rise to new comparison methods. AMS SUBJECT CLASSIFICATION: Primary 92B05, 33C20, secondary 39A14, 65Q30.
Assuntos
DNA/química , Alinhamento de Sequência , Análise de Sequência de DNA/métodos , Sequência de Bases , DNA/genética , SoftwareRESUMO
OBJECT: The high prevalence and negative consequences of depression in caregivers have led to the development of depression prevention programs for this population. Their efficacy might be influenced by depression risk factors, and different interventions might fit specific caregiver profiles. Study goals were to examine (1) which subgroups of female caregivers had the highest likelihood of major depression (MDD) onset by 12-month follow-up based on depression risk factors and participation in two depression prevention programs, and (2) specific MDD predictors for each prevention approach. METHOD: Data were analyzed from two randomized trials: (1) cognitive-behavioral group (CB) vs. usual care (UC); n = 165; (2) problem-solving group (PS) vs. UC; n =165 (mean age = 54.5). RESULTS: Classification tree analysis showed that emotional distress (ED) was the strongest predictor in both trials. Additional MDD predictors were (i) lower age (for caregivers with low ED); (ii) working outside the home (for caregivers with intermediate ED); and (iii) higher autonomy in the care-recipient (for homemakers). The strongest predictors for each prevention intervention were lower age for CB, higher social class for PS, and ED and depressive symptoms for UC. CONCLUSIONS: RESULTS implicate the utility of emotional distress for depression screening and the need to develop tailored interventions.
Assuntos
Cuidadores/psicologia , Transtorno Depressivo Maior , Estresse Psicológico/complicações , Adulto , Idoso , Transtorno Depressivo Maior/diagnóstico , Transtorno Depressivo Maior/etiologia , Transtorno Depressivo Maior/prevenção & controle , Feminino , Humanos , Pessoa de Meia-Idade , Prognóstico , Psicoterapia/métodos , Ensaios Clínicos Controlados Aleatórios como Assunto , Fatores de Risco , Resultado do TratamentoRESUMO
Background: Due to the accessibility barriers of in-person programs for active aging, the development of programs that use innovative technologies is needed. Video games can be an engaging tool for disseminating active aging interventions. Objective: The objective of this pilot study was to analyze the feasibility of a cognitive-behavioral intervention to promote active aging administered through a video game. Methods: Fifty-five participants (63.6% women, mean age = 53.0 years) were randomly assigned to a cognitive-behavioral intervention to promote active aging administered through an interactive multimedia online video game with a complementary app (CBI-V; n = 29) or to a control group that received nonspecific online information (CG; n = 26). Results: Only 3.6% of the participants dropped out of the study (6.9% in CBI-V and 0.0% in CG; without significant differences between groups). The mean number of modules completed was 7.6 (SD = 0.9) out of 8 in the CBI-V and 7.9 (SD = 0.5) in the control group (CG), without significant between-group differences. In the CBI-V, the mean total time dedicated to the game was 516.8â min (SD = 94.3), including 143.2â min (SD = 31.6) of cognitive training tasks, and the mean of completed tasks was 206.2 (SD = 33.7) out of 259. Participants were highly engaged (M = 39.9, SD = 8.6) and satisfied (M = 25.8, SD = 4.5) with the intervention. After the intervention, the CBI-V group significantly improved on SF-36 dimensions of General Health (p = .0386), Vitality (p = .0283), Social Functioning (p = .0130), and Physical Summary Index (p = .0370) compared to the CG, with medium effect sizes (d = 0.56-0.75). Conclusions: The results demonstrate the feasibility of the video game intervention to promote active aging and encourage conducting a large-scale randomized controlled trial.
RESUMO
Introduction: Although previous research has demonstrated that resilience can be protective against various mental health conditions such as depression, existing studies examining the relationship between resilience and depression have limitations. To our knowledge, the moderators of the relationship have not been examined. The aim of this study was to determine whether resilience acts as a protective factor against depression in informal caregivers and to examine potential moderators of the relationship between these variables. Methods: In this cross-sectional study, 554 randomly selected informal caregivers participated (86.8% women, average age = 55.3 years). Major depressive episode, depressive symptomatology, resilience, positive environmental reward, negative automatic thoughts, self-efficacy, and personality were assessed. Results: A total of 16.1% of informal caregivers met criteria for a depressive episode and 57.4% were at risk of developing depression. The average resilience score was 26.3 (SD = 7.6); 62.6% of participants were in the lower quartile of the resilience scale. The gender of the informal caregiver and self-efficacy acted as moderating variables in the relationship between resilience and depression. The impact of resilience on depressive symptoms was more pronounced in female informal caregivers, and increased as self-efficacy increased. Discussion: Based on these findings, programs aimed at preventing depression in informal caregivers should focus on promoting resilience, especially in women, and introduce strategies to enhance self-efficacy to increase their impact.
RESUMO
Uncontrolled use of pesticides has caused a dramatic reduction in the number of pollinators, including bees. Studies on the effects of pesticides on bees have reported effects on both metabolic and neurological levels under chronic exposure. In this study, variations in the differential expression of head and thorax-abdomen proteins in Africanized A. mellifera bees treated acutely with sublethal doses of glyphosate and imidacloprid were studied using a proteomic approach. A total of 92 proteins were detected, 49 of which were differentially expressed compared to those in the control group (47 downregulated and 2 upregulated). Protein interaction networks with differential protein expression ratios suggested that acute exposure of A. mellifera to sublethal doses of glyphosate could cause head damage, which is mainly associated with behavior and metabolism. Simultaneously, imidacloprid can cause damage associated with metabolism as well as, neuronal damage, cellular stress, and impairment of the detoxification system. Regarding the thorax-abdomen fractions, glyphosate could lead to cytoskeleton reorganization and a reduction in defense mechanisms, whereas imidacloprid could affect the coordination and impairment of the oxidative stress response.
Assuntos
Glicina , Glifosato , Neonicotinoides , Nitrocompostos , Proteoma , Animais , Abelhas/efeitos dos fármacos , Neonicotinoides/toxicidade , Glicina/análogos & derivados , Glicina/toxicidade , Nitrocompostos/toxicidade , Imidazóis/toxicidade , Inseticidas/toxicidadeRESUMO
New service delivery systems are needed to expand the reach of evidence-based practices for childhood trauma. Cognitive behavioral therapy is an effective approach for treating -childhood trauma, yet treatment barriers remain. Stepped care models that incorporate parent-led -treatment with therapist assistance may be one approach to improve access. This case study highlights the core components of a parent-led therapist-assisted treatment called Stepping Together that serves as a Step 1 treatment within a stepped care model. The components and structure of Stepping Together are described, along with excerpts from therapy sessions to illustrate the therapist's implementation of the model. Results of the case, in which improvements occurred, are presented. Stepping Together, a parent-led therapist-assisted first-line treatment within stepped care trauma-focused cognitive behavioral therapy, may be an effective treatment for some children after trauma and their caregivers, although more research is needed.
Assuntos
Terapia Cognitivo-Comportamental , Pais , Humanos , Resultado do Tratamento , Pais/psicologia , Terapia Cognitivo-Comportamental/métodosRESUMO
Due to the limited availability of in-person interventions for caregivers, the development of effective programs that use new technologies to prevent depression is needed. The goal of this research was to assess the efficacy of a cognitive behavioral intervention for the prevention of depression, administered to nonprofessional caregivers through a smartphone application (app). One hundred and seventy-five caregivers were randomly assigned to either an app-based cognitive behavioral intervention (CBIA), the CBIA intervention plus a telephone conference call (CBIA + CC), or an attention control group (ACG). At post-intervention, the incidence of depression was lower in the CBIA and CBIA + CC compared to the ACG (1.7% and 0.0% vs. 7.9%, respectively). The absolute risk, relative risk, and number needed to treat compared to the ACG were 6.2%, 21.6%, and 16 for the CBIA, whilst they were 8%, 0.0%, and 13 for the CBIA + CC. Depressive symptomatology was significantly lower in the CBIA and CBIA + CC compared to the ACG (d = 0.84, Cliff's δ = 0.49; d = 1.56, Cliff's δ = 0.72), as well as in the CBIA + CC compared to the CBIA (d = 0.72, Cliff's δ = 0.44). The prevention of depression was more likely in participants who received the CBIA, and adding the conference call in the CBIA + CC group improved the likelihood of this.
RESUMO
INTRODUCTION: Addressing suicide requires an understanding of regional patterns of epidemiology, with health variables being central. However, the clinical profile of people who commit suicide has received little attention. The objectives of this study were to analyze the sociodemographic, clinical, and forensic characteristics of persons who committed suicide in Galicia between 2013 and 2016, analyze suicide mortality rates, and identify trajectories of hospitalizations and associated variables. MATERIAL AND METHODS: A population study was carried out on the 1354 people who died by suicide in Galicia. RESULTS: The most common profile was a retired man, 57.9 years old (SD=18.5), from an urban and inner area. 43.6% had been previously hospitalized, 41.6% had been diagnosed with physical disorders, and 26.8% with mental disorders. 48.2% had been prescribed psychiatric medications and 29.6% had received outpatient psychiatric care. The highest prevalence of death by suicide (27.5%) was in 2014, with the predominant method being hanging (59.1%). The average raw rate was 12.3/100,000. Three trajectories of hospitalizations emerged: 94.83% had experienced few hospitalizations; 2.95% an increasing pattern; and 2.22% a decreasing pattern. These trajectories were associated with number of psychiatric appointments, prescription of psychiatric medications, and diagnoses of physical and mental disorders. CONCLUSIONS: These findings are crucial for detection and prevention.
Assuntos
Transtornos Mentais , Suicídio , Masculino , Humanos , Pessoa de Meia-Idade , Suicídio/psicologia , Transtornos Mentais/epidemiologia , Hospitalização , Projetos de PesquisaRESUMO
PURPOSE: To assess the association between gender-based violence and DSM-IV Axis I disorders in female college students. METHODS: A stratified random sample of 1,043 college women (average age 22.2 years) participated in the study. We collected sociodemographic, socioeconomic and academic information as well as information on the participants' experience of gender-based violence victimization. The presence of mental disorders during the 12 months preceding the study was assessed by clinically trained interviewers applying the Structured Clinical Interview for DSM-IV Axis I disorders-Clinician Version (SCID-CV). RESULTS: 15.2% of the participants reported lifetime gender-based violence victimization. Almost two-thirds of the victims had suffered some Axis I disorder during the past year, a significantly larger proportion than among non-victims (OR = 3.72; 95% CI 2.61-5.30). Mood disorders and anxiety disorders were both significantly more common among victims than non-victims (OR = 4.26; 95% CI 2.81-6.46 and OR = 1.97; 95% CI 1.20-3.24, respectively). The most prevalent individual disorder among victims was major depressive disorder (26.41%). Among victims of purely psychological violence, the overall rate of Axis I disorder was similar to the rate among other victims (67 and 61%, respectively). CONCLUSIONS: Among female university students, the experience of physical or psychological gender-based violence is associated with mental disorder. These findings suggest the need for treatment and prevention interventions designed specifically for this population.