Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 35
Filtrar
Más filtros

País/Región como asunto
Tipo del documento
Intervalo de año de publicación
1.
J Nat Prod ; 87(4): 1075-1083, 2024 Apr 26.
Artículo en Inglés | MEDLINE | ID: mdl-38591246

RESUMEN

Cinnamoyl moiety containing nonribosomal peptides represented by pepticinnamin E are a growing family of natural products isolated from different Streptomyces species and possess diverse bioactivities. The soil bacterium Streptomyces mirabilis P8-A2 harbors a cryptic pepticinnamin biosynthetic gene cluster, producing azodyrecins as major products. Inactivation of the azodyrecin biosynthetic gene cluster by CRISPR-BEST base editing led to the activation and production of pepticinnamin E (1) and its analogues, pepticinnamins N, O, and P (2-4), the structures of which were determined by detailed NMR spectroscopy, HRMS data, and Marfey's reactions. These new compounds did not show a growth inhibitory effect against the LNCaP and C4-2B prostate cancer lines, respectively.


Asunto(s)
Microbiología del Suelo , Streptomyces , Streptomyces/química , Estructura Molecular , Humanos , Familia de Multigenes , Péptidos/química , Péptidos/farmacología , Péptidos/aislamiento & purificación , Línea Celular Tumoral
2.
Psychiatry Clin Neurosci ; 74(8): 418-423, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32306467

RESUMEN

AIM: We aimed to identify whether lifetime cocaine use is a risk factor for conversion from major depressive disorder (MDD) to bipolar disorder (BD) in an outpatient sample of adults. METHODS: This prospective cohort study included 585 subjects aged 18 to 60 years who had been diagnosed with MDD as assessed by the Mini International Neuropsychiatric Interview (MINI-Plus) at baseline (2012-2015). Subjects were reassessed a mean of 3 years later (2017-2018) for potential conversion to BD as assessed by the MINI-Plus. Lifetime cocaine use was assessed using the Alcohol, Smoking, and Substance Involvement Screening Test. RESULTS: In the second wave, we had 117 (20%) losses, and 468 patients were reassessed. The rate of conversion from MDD to BD in 3 years was 12.4% (n = 58). A logistic regression analysis showed that the risk for conversion from MDD to BD was 3.41-fold higher (95% confidence interval, 1.11-10.43) in subjects who reported lifetime cocaine use at baseline as compared to individuals who did not report lifetime cocaine use at baseline, after adjusting for demographic and clinical confounders. CONCLUSION: These findings showed that lifetime cocaine use is a potential predictor of conversion to BD in an MDD cohort. Further studies are needed to assess the possible underlying mechanisms linking exposure to cocaine with BD conversion.


Asunto(s)
Trastorno Bipolar/diagnóstico , Trastorno Bipolar/etiología , Trastornos Relacionados con Cocaína/complicaciones , Trastorno Depresivo Mayor/diagnóstico , Adolescente , Adulto , Trastorno Bipolar/epidemiología , Trastornos Relacionados con Cocaína/epidemiología , Trastorno Depresivo Mayor/epidemiología , Progresión de la Enfermedad , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Factores de Riesgo , Adulto Joven
3.
Psychiatry Clin Neurosci ; 73(9): 590-593, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31170316

RESUMEN

AIM: The aim of this study was to identify biomarkers associated with major depressive disorder (MDD) and conversion from MDD to bipolar disorder (BD) in an outpatient sample of women. METHODS: This was a longitudinal study including women diagnosed with MDD and aged 18 to 60 years. The follow-up was 3 years. The diagnosis was performed using the Mini International Neuropsychiatric Interview Plus. Blood collection was just performed in the first phase. Serum interleukin-6, tumor necrosis factor-α, brain-derived neurotrophic factor, glial cell-derived neurotrophic factor, and nerve growth factor (NGF) levels were measured using a commercial immunoassay kit. RESULTS: We included 156 women. The conversion rate from MDD to BD was 15.4% (n = 24). NGF serum levels were increased in patients who converted to BD compared to the remitted MDD group and current MDD group (P = 0.013). The Bonferroni post-hoc test for multiple comparisons revealed significant differences for higher NGF levels in patients who converted to BD compared to patients with current MDD (P = 0.037). Interleukin-6, tumor necrosis factor-α, brain-derived neurotrophic factor, and glial cell-derived neurotrophic factor serum levels did not differ among the groups. CONCLUSION: Our results suggest that NGF might be a useful biomarker associated with early detection of conversion to BD, helping clinicians in the clinical diagnosis.


Asunto(s)
Trastorno Bipolar/sangre , Trastorno Depresivo Mayor/sangre , Factor de Crecimiento Nervioso/sangre , Adulto , Trastorno Bipolar/psicología , Factor Neurotrófico Derivado del Encéfalo/sangre , Trastorno Depresivo Mayor/psicología , Femenino , Factor Neurotrófico Derivado de la Línea Celular Glial/sangre , Humanos , Interleucina-6/sangre , Estudios Longitudinales , Persona de Mediana Edad , Factor de Necrosis Tumoral alfa/sangre , Adulto Joven
4.
Neuroendocrinology ; 101(1): 82-6, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-25571775

RESUMEN

OBJECTIVE: The present study investigated whether peripheral leptin levels are associated with current depressive episodes in a cross-sectional study nested within a population-based study. METHODS: The Mini-International Neuropsychiatric Interview (MINI) 5.0 was used to assess the presence of current depressive episodes. The sample was composed of 206 subjects (103 controls and 103 subjects with a current depressive episode) paired by gender, BMI and age. Medication use and lifestyle characteristics were self-reported. RESULTS: Serum leptin levels were lower in currently depressive subjects (10.9 ± 12.0 ng/ml) than in the control group (20.3 ± 24.0 ng/ml; p = 0.023). According to the clinical diagnosis, individuals with bipolar depression present lower leptin levels (8.4 ± 8.1 ng/ml) than those with unipolar depression (12.0 ± 13.4 ng/ml) and the control group (20.3 ± 24.0 ng/ml; p = 0.031). In addition, ANCOVA showed that leptin is an independent factor associated with current depressive episodes (p = 0.018). CONCLUSION: A decreased leptin level might be a useful peripheral marker associated with depressive episodes in the context of bipolar disorder.


Asunto(s)
Trastorno Bipolar/sangre , Trastorno Depresivo/sangre , Leptina/sangre , Adolescente , Adulto , Estudios Transversales , Femenino , Humanos , Masculino , Pruebas Neuropsicológicas , Adulto Joven
5.
Alcohol Clin Exp Res ; 39(1): 30-3, 2015 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-25623403

RESUMEN

BACKGROUND: The diagnosis of alcohol use disorder is based on clinical signs and on the measurement of biological markers. However, these markers are neither sufficiently sensitive, nor specific enough, for determining the effects of alcohol abuse on the central nervous system. Serum neurotrophins are important regulators of neural survival, development, function, and plasticity and have been found to be reduced in alcohol use disorder. The aim of this study was to investigate the alterations in serum neurotrophin levels (brain-derived neurotrophic factor [BDNF], glial-derived neurotrophic factor [GDNF], and nerve growth factor [NGF]) in alcohol use disorder in a young population, and thus possibly representing the early stages of the illness. METHODS: This is a cross-sectional study, nested in a population-based study of people aged 18 to 35, involving 795 participants. The participants responded to the CAGE questionnaire, and a CAGE score of ≥2 was considered to be a positive screen for the abuse/dependence or moderate to severe alcohol use disorder. Serum BDNF, GDNF, and NGF levels were measured by ELISA. RESULTS: In the CAGE ≥ 2 group, GDNF (p ≤ 0.001) and NGF (p ≤ 0.001) serum levels were significantly increased, and the BDNF elevation was near a statistical significance (p = 0.068) when compared to the CAGE < 2 group. A significantly positive correlation was observed only in the CAGE ≥ 2 group for BDNF/GDNF (r = 0.37, p < 0.001) and GDNF/NGF (r = 0.84, p < 0.001) levels. The correlation between the NGF and BDNF levels was significantly positive in both groups (r = 0.28, p < 0.001 for the CAGE < 2 group, and r = 0.30, p = 0.008 for the CAGE ≥ 2 group). CONCLUSIONS: These results suggest that elevated neurotrophins are candidate markers for the early stages of alcohol misuse.


Asunto(s)
Alcoholismo/sangre , Factor Neurotrófico Derivado del Encéfalo/sangre , Factor Neurotrófico Derivado de la Línea Celular Glial/sangre , Factor de Crecimiento Nervioso/sangre , Adolescente , Adulto , Biomarcadores/sangre , Estudios Transversales , Femenino , Humanos , Masculino , Adulto Joven
6.
Bipolar Disord ; 16(7): 741-7, 2014 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-24862833

RESUMEN

OBJECTIVE: The aim of the present study was to investigate the relationship between peripheral levels of corticotropin-releasing hormone (CRH) and interleukin-1ß (IL-1ß) in individuals with bipolar disorder (BD) with and without suicide risk (SR), and controls. METHODS: A total of 120 young adults (40 controls, 40 subjects with BD without SR, and 40 subjects with BD with SR) were enrolled from a population-based study carried out in the city of Pelotas, Brazil. BD and SR were assessed through the Mini International Neuropsychiatric Interview (MINI 5.0), and peripheral markers were evaluated by enzyme-linked immunosorbent assay (ELISA). RESULTS: Levels of CRH were significantly lower both in subjects with BD without SR (p = 0.04) and subjects with BD with SR (p = 0.02) when compared to controls. However, levels of IL-1ß were increased in subjects with BD with SR (p = 0.05) when compared to controls. Sociodemographic and clinical variables, current mood episode, and use of psychiatric medications were not associated with changes in these markers. No correlation was found between peripheral levels of CRH and IL-1ß (p = 0.60) in the population or in the BD with SR group (p = 0.88). CONCLUSIONS: These results suggest that peripheral mechanisms linking stress hormones and the immune system might be critical patterns involved in suicidal behavior associated with BD.


Asunto(s)
Trastorno Bipolar , Hormona Liberadora de Corticotropina/sangre , Enfermedades del Sistema Inmune/etiología , Interleucina-1beta/sangre , Suicidio/psicología , Adolescente , Adulto , Análisis de Varianza , Trastorno Bipolar/sangre , Trastorno Bipolar/complicaciones , Trastorno Bipolar/psicología , Ensayo de Inmunoadsorción Enzimática , Femenino , Alucinógenos/uso terapéutico , Humanos , Masculino , Escalas de Valoración Psiquiátrica , Riesgo , Adulto Joven
7.
ACS Chem Biol ; 19(6): 1303-1310, 2024 Jun 21.
Artículo en Inglés | MEDLINE | ID: mdl-38743035

RESUMEN

Isoquinolinequinones represent an important family of natural alkaloids with profound biological activities. Heterologous expression of a rare bifunctional indole prenyltransferase/tryptophan indole-lyase enzyme from Streptomyces mirabilis P8-A2 in S. albidoflavus J1074 led to the activation of a putative isoquinolinequinone biosynthetic gene cluster and production of a novel isoquinolinequinone alkaloid, named maramycin (1). The structure of maramycin was determined by analysis of spectroscopic (1D/2D NMR) and MS spectrometric data. The prevalence of this bifunctional biosynthetic enzyme was explored and found to be a recent evolutionary event with only a few representatives in nature. Maramycin exhibited moderate cytotoxicity against human prostate cancer cell lines, LNCaP and C4-2B. The discovery of maramycin (1) enriched the chemical diversity of natural isoquinolinequinones and also provided new insights into crosstalk between the host biosynthetic genes and the heterologous biosynthetic genes in generating new chemical scaffolds.


Asunto(s)
Dimetilaliltranstransferasa , Isoquinolinas , Streptomyces , Streptomyces/genética , Streptomyces/metabolismo , Streptomyces/enzimología , Humanos , Dimetilaliltranstransferasa/metabolismo , Dimetilaliltranstransferasa/genética , Línea Celular Tumoral , Isoquinolinas/química , Isoquinolinas/metabolismo , Isoquinolinas/farmacología , Antineoplásicos/farmacología , Antineoplásicos/química , Antineoplásicos/metabolismo , Terpenos/metabolismo , Terpenos/química , Familia de Multigenes
8.
J Psychiatr Res ; 158: 185-191, 2023 02.
Artículo en Inglés | MEDLINE | ID: mdl-36587497

RESUMEN

INTRODUCTION: Studies on maternal microRNA expression have emerged to better understand regulatory mechanisms during the gestational period, since microRNA expression has been associated with pregnancy disorders. OBJECTIVES: This study aims to investigate the association between the expression of the maternal microRNAs miR-let-7d-3p and miR-451a during the second gestational trimester and neuropsychomotor development at 90 days of life of infants. METHODS: This is a case-control study nested within a cohort, with the groups being divided into dyads in which pregnant women presented Major Depressive Episode (MDE) (n = 64), these being the cases, and their respective controls (no MDE; n = 64). The Bayley Scale III was used to assess the outcome of child development, and MDE was assessed through the Mini International Neuropsychiatric Interview Plus. The analysis of miR-let-7d-3p and miR-451a was done via serum from the pregnant women, utilizing the qRT-PCR (n = 128). RESULTS: The results indicated a negative association between expression levels of miR-451a (ß -3.3 CI95% -6.4;-0.3) and a positive associated of the miR-let-7d-3p with the cognitive development domain (ß 1.7 CI95% 0.1; 3.0), and a positive association between expression of miR-let-7d-3p with motor development of the infants (ß 1.6 CI95% 0.3; 2.9). CONCLUSION: This is a pioneering study on the topic that indicates a biological interrelationship between the miRNAs miR-let-7d-3p and miR-451a evaluated during the pregnancy and the motor and cognitive domains of infant development at 90 days postpartum.


Asunto(s)
Trastorno Depresivo Mayor , MicroARNs , Embarazo , Niño , Humanos , Femenino , Estudios de Casos y Controles , Familia , Línea Celular Tumoral
9.
Brain Behav Immun Health ; 11: 100191, 2021 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-34589728

RESUMEN

Generalized Anxiety Disorder (GAD) presents a high prevalence in the population, leading to distress and disability. Immune system alterations have been associated with anxiety-related behaviors in rodents and GAD patients. CD300f immune receptors are highly expressed in microglia and participate not only in the modulation of immune responses but also in pruning and reshaping synapses. It was recently demonstrated that CD300f might be influential in the pathogenesis of depression in a sex-dependent manner. Here, we evaluated the role of CD300f immune receptor in anxiety, using CD300f knockout mice (CD300f-/-) and patients with GAD. We observed that male CD300f-/- mice had numerous behavioral changes associated with a low-anxiety phenotype, including increased open field central locomotion and rearing behaviors, more exploration in the open arms of the elevated plus-maze test, and decreased latency to eat in the novelty suppressed feeding test. In a cross-sectional population-based study, including 1111 subjects, we evaluated a common single-nucleotide polymorphism rs2034310 (C/T) in the cytoplasmatic tail of CD300f gene in individuals with GAD. Notably, we observed that the T allele of the rs2034310 polymorphism conferred protection against GAD in men, even after adjusting for confounding variables. Overall, our data demonstrate that CD300f immune receptors are involved in the modulation of pathological anxiety behaviors in a sex-dependent manner. The biological basis of these sex differences is still poorly understood, but it may provide significant clues regarding the neuropathophysiological mechanisms of GAD and can pave the way for future specific pharmacological interventions.

10.
J Affect Disord ; 295: 1049-1056, 2021 12 01.
Artículo en Inglés | MEDLINE | ID: mdl-34706413

RESUMEN

BACKGROUND: Machine learning methods for suicidal behavior so far have failed to be implemented as a prediction tool. In order to use the capabilities of machine learning to model complex phenomenon, we assessed the predictors of suicide risk using state-of-the-art model explanation methods. METHODS: Prospective cohort study including a community sample of 1,560 young adults aged between 18 and 24. The first wave took place between 2007 and 2009, and the second wave took place between 2012 and 2014. Sociodemographic and clinical characteristics were assessed at baseline. Incidence of suicide risk at five-years of follow-up was the main outcome. The outcome was assessed using the Mini Neuropsychiatric Interview (MINI) at both waves. RESULTS: The risk factors for the incidence of suicide risk at follow-up were: female sex, lower socioeconomic status, older age, not studying, presence of common mental disorder symptoms, and poor quality of life. The interaction between overall health and socioeconomic status in relation to suicide risk was also captured and shows a shift from protection to risk by socioeconomic status as overall health increases. LIMITATIONS: Proximal factors associated with the incidence of suicide risk were not assessed. CONCLUSIONS: Our findings indicate that factors related to poor quality of life, not studying, and common mental disorder symptoms of young adults are already in place prior to suicide risk. Most factors present critical non-linear patterns that were identified. These findings are clinically relevant because they can help clinicians to early detect suicide risk.


Asunto(s)
Calidad de Vida , Intento de Suicidio , Adolescente , Adulto , Anciano , Femenino , Humanos , Incidencia , Estudios Prospectivos , Ideación Suicida , Adulto Joven
11.
Cancers (Basel) ; 13(6)2021 Mar 14.
Artículo en Inglés | MEDLINE | ID: mdl-33799432

RESUMEN

Docetaxel-a taxane-based chemotherapeutic agent-was the first treatment to demonstrate significant improvements in overall survival in men with metastatic castration-resistant prostate cancer (mCRPC). However, the response to docetaxel is generally short-lived, and relapse eventually occurs due to the development of resistance. To explore the mechanisms of acquired docetaxel resistance in prostate cancer (PCa) and set these in the context of androgen deprivation therapy, we established docetaxel-resistant PCa cell lines, derived from the androgen-dependent LNCaP cell line, and from the LNCaP lineage-derived androgen-independent C4-2B sub-line. We generated two docetaxel-resistant LNCaPR and C4-2BR sub-lines, with IC50 values 77- and 50-fold higher than those of the LNCaP and C4-2B parental cells, respectively. We performed gene expression analysis of the matched sub-lines and found several alterations that may confer docetaxel resistance. In addition to increased expression of ABCB1, an ATP-binding cassette (ABC) transporter, and a well-known gene associated with development of docetaxel resistance, we identified genes associated with androgen signaling, cell survival, and overexpression of ncRNAs. In conclusion, we identified multiple mechanisms that may be associated with the development of taxane drug resistance in PCa. Actioning these mechanisms could provide a potential approach to re-sensitization of docetaxel-resistant PCa cells to docetaxel treatment and thereby further add to the life-prolonging effects of this drug in men with mCRPC.

12.
Trends Psychiatry Psychother ; 42(2): 115-121, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32696888

RESUMEN

Introduction Childhood trauma has been suggested to be involved in susceptibility to bipolar disorder (BP). However, it remains unclear whether the occurrence of childhood trauma is differently distributed in subthreshold bipolar disorder (SBP). Objective To assess childhood trauma in young adults with SBP, as compared to young adults with BP and population controls (PC). Method This was a cross-sectional, population-based study. The Mini International Neuropsychiatric Interview (MINI) was used to define the groups with BP (subjects with a lifetime or current manic episode or lifetime or current hypomania with a history of a depressive episode), SBP (subjects with a history of hypomanic episode without lifetime or current depressive episode), and subjects without mood disorders (PC). Childhood trauma was assessed using de Childhood Trauma Questionnaire (CTQ). We investigated differences regarding childhood trauma across the three groups (BP, SBP and PC). Result Except for sexual abuse, all subtypes of childhood trauma remained associated with the BP group as compared to PC. Additionally, when we compared SBP and BP, significant differences were found only for emotional abuse. No significant differences were found in relation to childhood trauma between the SBP and PC groups after adjusting for confounding factors. Conclusion These findings suggest that investigating childhood trauma, with a particular focus on emotional abuse, could be considered a preventive measure and potentially improve the prognosis.


Asunto(s)
Adultos Sobrevivientes de Eventos Adversos Infantiles/estadística & datos numéricos , Experiencias Adversas de la Infancia , Trastorno Bipolar/epidemiología , Manía/epidemiología , Trauma Psicológico/epidemiología , Adulto , Adultos Sobrevivientes del Maltrato a los Niños/estadística & datos numéricos , Trastorno Bipolar/etiología , Brasil/epidemiología , Estudios Transversales , Femenino , Humanos , Masculino , Manía/etiología , Trauma Psicológico/complicaciones , Adulto Joven
13.
Braz J Psychiatry ; 43(1): 22-28, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32844885

RESUMEN

OBJECTIVE: Clinical and biological correlates of resilience in major depressive disorder are scarce. We aimed to investigate the effect of the Val66Met polymorphism in the BDNF gene on resilience scores in major depressive disorder patients and evaluate the polymorphism's moderation effect on resilience scores in response to cognitive therapy. METHOD: A total of 106 major depressive disorder patients were enrolled in this clinical randomized study. The Resilience Scale and the Hamilton Rating Scale for Depression were applied at baseline, post-treatment, and at six months of follow-up. Blood samples were obtained at baseline for molecular analysis. RESULTS: The baseline resilience scores were higher in patients with the Met allele (114.6±17.6) than in those with the Val/Val genotype (104.04±21.05; p = 0.037). Cognitive therapy treatment increased resilience scores (p ≤ 0.001) and decreased depressive symptoms (p ≤ 0.001). In the mixed-effect model, the Val/Val genotype represented a decrease in resilience scores (t218 = -1.98; p = 0.048), and the Val66Met polymorphism interacted with sex to predict an increase in total resilience scores during cognitive treatment (t218 = 2.69; p = 0.008). CONCLUSION: Our results indicate that cognitive therapy intervention could improve resilience in follow-up, considering that gender and genetic susceptibility are predicted by the Val66Met polymorphism.


Asunto(s)
Terapia Cognitivo-Conductual , Trastorno Depresivo Mayor , Factor Neurotrófico Derivado del Encéfalo/genética , Trastorno Depresivo Mayor/genética , Trastorno Depresivo Mayor/terapia , Genotipo , Humanos , Polimorfismo Genético , Polimorfismo de Nucleótido Simple
14.
Braz J Psychiatry ; 41(1): 38-43, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-30328961

RESUMEN

OBJECTIVE: To identify the association of metabolic syndrome (MetS) and psychiatric disorders in young adults in southern Brazil. METHODS: This population based cross-sectional study involved a total of 1,023 young adults between the ages of 21 and 32 years. Current episodes of psychiatric disorders were assessed using the Mini International Neuropsychiatric Interview - Plus version. MetS was evaluated using the National Cholesterol Education Program Adult Treatment Panel III (NCEP/ATP III). RESULTS: Of the 1,023 participants, 24.3% were identified with MetS, 13.5% were diagnosed with anxiety disorders, 7.5% with current depression, 3.9% with bipolar disorders and 10.1% were at risk of suicide. MetS was associated with ethnicity (p = 0.022), excess weight (p < 0.001), current anxiety disorders (p < 0.001), current mood disorders (bipolar disorder in mood episode and current depression) (p < 0.001), and suicide risk (p < 0.001). CONCLUSIONS: MetS was associated with psychiatric disorders. Awareness of factors associated with MetS can help identify high-risk individuals and stimulate disease prevention and control programs, as well as lifestyle changes.


Asunto(s)
Trastornos Mentales/psicología , Síndrome Metabólico/complicaciones , Adulto , Brasil/epidemiología , Estudios Transversales , Femenino , Humanos , Trastornos Mentales/epidemiología , Síndrome Metabólico/epidemiología , Síndrome Metabólico/psicología , Prevalencia , Factores Socioeconómicos , Adulto Joven
15.
Braz J Psychiatry ; 40(2): 216-219, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29412334

RESUMEN

OBJECTIVE: To evaluate the serum leptin levels in cannabis smokers. METHODS: This was a cross-sectional population-based study of participants between the ages of 18 and 35 years. The data were collected through a self-administered questionnaire covering sociodemographic data and the use of psychoactive substances. Leptin levels were measured using a commercial ELISA kit. RESULTS: Of the 911 participants, 6.7% were identified as cannabis smokers and had significantly lower leptin levels (p = 0.008). When stratified by gender, there was a significant decrease in leptin levels among male smokers (p = 0.039). CONCLUSION: Cannabis smoking was linked to leptin levels in men, suggesting that the response to biological signals may be different between men and women.


Asunto(s)
Leptina/sangre , Fumar Marihuana/sangre , Adolescente , Adulto , Apetito/efectos de los fármacos , Brasil , Estudios Transversales , Femenino , Humanos , Masculino , Fumar Marihuana/fisiopatología , Factores Sexuales , Factores Socioeconómicos , Encuestas y Cuestionarios , Adulto Joven
16.
Braz J Psychiatry ; 40(4): 361-366, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29898192

RESUMEN

OBJECTIVE: To correlate neurotrophic factors - brain-derived neurotrophic factor (BDNF), glial cell line-derived neurotrophic factor (GDNF), and beta-nerve growth factor (beta-NGF) - and severity of depressive symptoms in patients diagnosed with major depressive disorder (MDD) undergoing cognitive-behavioral therapy (CBT). METHODS: In this quasi-experimental study, participants were selected by convenience and received 16 sessions of CBT. The outcomes of interest were severity of depressive symptoms and changes in neurotrophic factor levels after CBT. The differences between variables before and after treatment (deltas) were analyzed. RESULTS: Patients had significant changes in symptom severity after treatment. No significant associations were found between Beck Depression Inventory II (BDI-II) scores and any independent variable. No correlations were observed between BDNF or GDNF levels and BDI scores before or after treatment, although there was a trend toward significant differences in beta-NGF levels. CONCLUSION: BDNF, beta-NGF, and GDNF were not influenced by the effects of CBT on depressive symptoms.


Asunto(s)
Factor Neurotrófico Derivado del Encéfalo/sangre , Terapia Cognitivo-Conductual/métodos , Trastorno Depresivo Mayor/sangre , Factor Neurotrófico Derivado de la Línea Celular Glial/sangre , Factor de Crecimiento Nervioso/sangre , Factores de Crecimiento Nervioso/sangre , Adulto , Trastorno Depresivo Mayor/diagnóstico , Trastorno Depresivo Mayor/psicología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Ensayos Clínicos Controlados no Aleatorios como Asunto , Escalas de Valoración Psiquiátrica , Índice de Severidad de la Enfermedad , Factores Socioeconómicos , Adulto Joven
17.
Braz J Psychiatry ; 40(4): 349-353, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29451585

RESUMEN

OBJECTIVE: To evaluate the association between abuse of and dependence on different psychoactive substances and the presence of anxiety disorders in a sample of young adults from a city in southern Brazil. METHODS: Between 2007 and 2009, we carried out a cross-sectional, population-based study of individuals aged 18-24 years who lived in Pelotas, a city in southern Brazil. We evaluated anxiety disorders using the Mini International Neuropsychiatric Interview 5.0 (MINI), and use of psychoactive substances with the Alcohol, Smoking, and Substance Involvement Screening Test (ASSIST 2.0/0MS). We used Fisher's exact test for univariate analysis, and Poisson regression models with robust variance for multivariable analysis. RESULTS: The sample consisted of 1,560 young adults. The overall prevalence of abuse/dependence was 26.9% for alcohol, 24.9% for tobacco, and 7.3% for illicit substances. Individuals with agoraphobia had a 32% higher prevalence of tobacco abuse/dependence (prevalence ratio [PR] = 1.32 [95%CI 1.01-1.74]). Individuals with posttraumatic stress disorder (PTSD) or generalized anxiety disorder (GAD) had a 2.41-fold (95%CI 1.22-4.77) and 1.76-fold (95%CI 1.00-3.11) higher prevalence of illicit substance abuse/dependence, respectively. CONCLUSION: In this population-based sample, we found associations between GAD, PTSD, and increased prevalence of illicit substance abuse/dependence. In addition, individuals with agoraphobia seem to have increased tobacco abuse/dependence.


Asunto(s)
Trastornos Relacionados con Alcohol/epidemiología , Trastornos de Ansiedad/epidemiología , Psicotrópicos/efectos adversos , Trastornos por Estrés Postraumático/epidemiología , Tabaquismo/epidemiología , Adolescente , Agorafobia/complicaciones , Agorafobia/epidemiología , Agorafobia/etiología , Trastornos Relacionados con Alcohol/complicaciones , Trastornos de Ansiedad/complicaciones , Trastornos de Ansiedad/etiología , Brasil/epidemiología , Análisis por Conglomerados , Estudios Transversales , Femenino , Humanos , Entrevista Psicológica , Masculino , Trastorno Obsesivo Compulsivo/complicaciones , Trastorno Obsesivo Compulsivo/epidemiología , Trastorno Obsesivo Compulsivo/etiología , Prevalencia , Trastornos por Estrés Postraumático/complicaciones , Encuestas y Cuestionarios , Tabaquismo/complicaciones , Adulto Joven
18.
Psychiatry Res ; 251: 85-89, 2017 May.
Artículo en Inglés | MEDLINE | ID: mdl-28189942

RESUMEN

The aim of this study was to compare the global functioning and cognitive performance in a community sample of young adults with mood disorders versus community controls. This was a cross-sectional study nested in a cohort study with a community sample. Data was collected from February 2012 to June 2014; specifically, at a mean of five years after the first phase, all young adults were invited to participate in a re-evaluation. Mini International Neuropsychiatric Interview - PLUS (MINI-PLUS) was used for the diagnosis of mood disorders. The Functional Assessment Short Test (FAST) and the Montreal Cognitive Assessment (MoCA) were used to assess the global functioning, and cognitive performance, respectively. Were included 1258 subjects. Functional impairment was greater in subjects with bipolar disorder when compared to community controls, and there were no differences between major depressive disorder and community controls. There were no significant differences in cognitive performance between young adults with mood disorders when compared to community controls. Functional impairment is a marker for bipolar disorder in young adults; however, gross cognitive impairment assessed by a screening test is not, possibly because cognition is impaired in more advanced stages of the disorder.


Asunto(s)
Trastornos del Conocimiento/epidemiología , Trastornos del Conocimiento/psicología , Trastornos del Humor/epidemiología , Trastornos del Humor/psicología , Características de la Residencia , Adolescente , Adulto , Brasil/epidemiología , Cognición/fisiología , Trastornos del Conocimiento/diagnóstico , Estudios de Cohortes , Estudios Transversales , Femenino , Humanos , Masculino , Trastornos del Humor/diagnóstico , Pruebas Neuropsicológicas , Adulto Joven
19.
J Psychiatr Res ; 86: 34-38, 2017 03.
Artículo en Inglés | MEDLINE | ID: mdl-27894002

RESUMEN

Approximately one million people commit suicide every year, being suicide attempts and ideation even more common. Changes in stress response and activation of the immune system have been associated with suicide risk. Here we investigated the interaction between immune system and HPA axis alterations in the suicide risk, looking for the influence of rs110402 CRHR1 SNP in the IL-1ß levels according to suicide ideation and attempt. This study evaluated 171 subjects of which 15 had suicidal ideation, 20 had suicide attempt and 136 were controls. Genotyping was performed by real-time PCR and IL-1ß levels were measured by ELISA. Our data showed that for each point increase in IL-1ß levels the risk of suicide attempt increased 5% [relative risk = 1.05 (95% CI: 1.0-1.10)]. After sample stratification by rs110402 SNP genotypes, we observed that in subjects carrying the A allele the risk raised to 15% [relative risk = 1.15 (95% CI: 1.03-1.28)], suggesting an apparent effect modification. Thus, this study showed that alterations in CRHR1 gene were associated with higher levels of IL-1ß, and increased risk for suicide, reinforcing the importance of multifactorial interactions of biological markers for psychiatric disorders.


Asunto(s)
Predisposición Genética a la Enfermedad , Interleucina-1beta/sangre , Polimorfismo de Nucleótido Simple , Receptores de Hormona Liberadora de Corticotropina/genética , Intento de Suicidio , Adolescente , Adulto , Biomarcadores/sangre , Estudios Transversales , Ensayo de Inmunoadsorción Enzimática , Femenino , Frecuencia de los Genes , Técnicas de Genotipaje , Humanos , Modelos Logísticos , Masculino , Reacción en Cadena de la Polimerasa , Ideación Suicida , Adulto Joven
20.
Braz. J. Psychiatry (São Paulo, 1999, Impr.) ; 43(1): 22-28, Jan.-Feb. 2021. tab, graf
Artículo en Inglés | LILACS | ID: biblio-1153276

RESUMEN

Objective: Clinical and biological correlates of resilience in major depressive disorder are scarce. We aimed to investigate the effect of the Val66Met polymorphism in the BDNF gene on resilience scores in major depressive disorder patients and evaluate the polymorphism's moderation effect on resilience scores in response to cognitive therapy. Method: A total of 106 major depressive disorder patients were enrolled in this clinical randomized study. The Resilience Scale and the Hamilton Rating Scale for Depression were applied at baseline, post-treatment, and at six months of follow-up. Blood samples were obtained at baseline for molecular analysis. Results: The baseline resilience scores were higher in patients with the Met allele (114.6±17.6) than in those with the Val/Val genotype (104.04±21.05; p = 0.037). Cognitive therapy treatment increased resilience scores (p ≤ 0.001) and decreased depressive symptoms (p ≤ 0.001). In the mixed-effect model, the Val/Val genotype represented a decrease in resilience scores (t218 = -1.98; p = 0.048), and the Val66Met polymorphism interacted with sex to predict an increase in total resilience scores during cognitive treatment (t218 = 2.69; p = 0.008). Conclusion: Our results indicate that cognitive therapy intervention could improve resilience in follow-up, considering that gender and genetic susceptibility are predicted by the Val66Met polymorphism.


Asunto(s)
Humanos , Terapia Cognitivo-Conductual , Trastorno Depresivo Mayor/genética , Trastorno Depresivo Mayor/terapia , Polimorfismo Genético , Factor Neurotrófico Derivado del Encéfalo/genética , Polimorfismo de Nucleótido Simple , Genotipo
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA