Emotional Regulation as a Transdiagnostic Process of Emotional Disorders in Therapy: A Systematic Review and Meta-Analysis.

CONTEXT: Several studies have shown that emotional regulation (ER) is a transdiagnostic construct of emotional disorders. Therefore, if therapy improves ER, it would improve psychological distress. OBJECTIVE: This review assesses and compares the changes in ER due to psychological treatment in different therapies. METHODS: A systematic review and meta-analysis of RCTs published in the databases PubMed, PsycINFO and Web of Science was performed. It was registered in PROSPERO under the number CRD42023387317. Two independent experts in the field reviewed the articles. RESULTS: A total of 18 articles met the criteria for inclusion in the review. Analysis of these studies suggests that in unified protocol (UP), cognitive behaviour therapy, dialectical behaviour therapy (DBT) and mindfulness, there is evidence to support that a moderate effect occurs during treatment. Furthermore, in mindfulness and DBT, the effect was moderate in the follow-up period, while in UP, it was high. LIMITATIONS: Given the heterogeneity of the applied interventions and the methodological limitations found in the reviewed trials, the results should be interpreted with caution. CONCLUSIONS: UP, cognitive behaviour therapy, DBT and mindfulness can improve ER after therapy, while UP, DBT and mindfulness in the follow-up period. Other therapies, such as SKY or Flotation REST, require more research.

INTRODUCCIÓN: Varios estudios han demostrado que la regulación emocional es un constructo transdiagnóstico de los trastornos emocionales. Por lo tanto, si la terapia mejora la regulación emocional, también mejorará el malestar psicológico. OBJETIVO: Evaluar y comparar el cambio en la regulación emocional debido al tratamiento psicológico en diferentes terapias. MÉTODO: Se realizó una revisión sistemática y metaanálisis de ECA publicados en las bases de datos PubMed, PsycINFO y Web of Science. Se registró en PROSPERO con el número CRD42023387317. Dos expertos independientes en la materia revisaron los artículos. RESULTADOS: Un total de 18 artículos cumplieron los criterios de inclusión en la revisión. El análisis de estos estudios sugiere que en el Protocolo Unificado, la Terapia Cognitivo Conductual, la Terapia Dialéctica Conductual y terapias basadas en mindfulness existen evidencias que apoyan que se produce un efecto moderado durante el tratamiento. Además, en las terapias basadas en mindfulness y en la Terapia Dialéctica Conductual, el efecto se moduló en el periodo de seguimiento, mientras que en el Protocolo Unificado fue mayor. LIMITACIONES: Dada la heterogeneidad de las intervenciones aplicadas y las limitaciones metodológicas encontradas en los ensayos revisados, los resultados podrán interpretarse con cautela. CONCLUSIONES: UP, CBT, DBT y mindfulness pueden mejorar la ER tras la terapia, mientras que UP, DBT y mindfulness pueden mejorar la recuperación tras un tiempo de seguimiento. Otras terapias, como SKY o Flotation REST, requieren más investigación.

Focused ultrasound on the substantia nigra enables safe neurotensin-polyplex nanoparticle-mediated gene delivery to dopaminergic neurons intranasally and by blood circulation.

Neurotensin-polyplex nanoparticles provide efficient gene transfection of nigral dopaminergic neurons when intracerebrally injected in preclinical trials of Parkinson's disease because they do not cross the blood-brain barrier (BBB). Therefore, this study aimed to open BBB with focused ultrasound (FUS) on the substantia nigra to attain systemic and intranasal transfections and evaluate its detrimental effect in rats. Systemically injected Evans Blue showed that a two-pulse FUS opened the nigral BBB. Accordingly, 35 µL of neurotensin-polyplex nanoparticles encompassing the green fluorescent protein plasmid (79.6 nm mean size and + 1.3 mV Zeta-potential) caused its expression in tyrosine hydroxylase(+) cells (dopaminergic neurons) of both substantiae nigrae upon delivery via internal carotid artery, retro-orbital venous sinus, or nasal mucosa 30 min after FUS. The intracarotid delivery yielded the highest transgene expression, followed by intranasal and venous administration. However, FUS caused neuroinflammation displayed by infiltrated lymphocytes (positive to cluster of differentiation 45), activated microglia (positive to ionized calcium-binding adaptor molecule 1), neurotoxic A1 astrocytes (positive to glial fibrillary acidic protein and complement component 3), and neurotrophic A2 astrocytes (positive to glial fibrillary acidic protein and S100 calcium-binding protein A10), that ended 15 days after FUS. Dopaminergic neurons and axonal projections decreased but recuperated basal values on day 15 after transfection, correlating with a decrease and recovery of locomotor behavior. In conclusion, FUS caused transient neuroinflammation and reversible neuronal affection but allowed systemic and intranasal transfection of dopaminergic neurons in both substantiae nigrae. Therefore, FUS could advance neurotensin-polyplex nanotechnology to clinical trials for Parkinson's disease.

Oral administration of a recombinant modified RBD antigen of SARS-CoV-2 as a possible immunostimulant for the care of COVID-19.

BACKGROUND: Developing effective vaccines against SARS-CoV-2 that consider manufacturing limitations, equitable access, and acceptance is necessary for developing platforms to produce antigens that can be efficiently presented for generating neutralizing antibodies and as a model for new vaccines. RESULTS: This work presents the development of an applicable technology through the oral administration of the SARS-CoV-2 RBD antigen fused with a peptide to improve its antigenic presentation. We focused on the development and production of the recombinant receptor binding domain (RBD) produced in E. coli modified with the addition of amino acids extension designed to improve antigen presentation. The production was carried out in shake flask and bioreactor cultures, obtaining around 200 mg/L of the antigen. The peptide-fused RBD and peptide-free RBD proteins were characterized and compared using SDS-PAGE gel, high-performance chromatography, and circular dichroism. The peptide-fused RBD was formulated in an oil-in-water emulsion for oral mice immunization. The peptide-fused RBD, compared to RBD, induced robust IgG production in mice, capable of recognizing the recombinant RBD in Enzyme-linked immunosorbent assays. In addition, the peptide-fused RBD generated neutralizing antibodies in the sera of the dosed mice. The formulation showed no reactive episodes and no changes in temperature or vomiting. CONCLUSIONS: Our study demonstrated the effectiveness of the designed peptide added to the RBD to improve antigen immunostimulation by oral administration.

Unilateral rNurr1-V5 transgene expression in nigral dopaminergic neurons mitigates bilateral neuropathology and behavioral deficits in parkinsonian rats with α-synucleinopathy.

JOURNAL/nrgr/04.03/01300535-202409000-00039/figure1/v/2024-01-16T170235Z/r/image-tiff Parkinsonism by unilateral, intranigral ß-sitosterol ß-D-glucoside administration in rats is distinguished in that the α-synuclein insult begins unilaterally but spreads bilaterally and increases in severity over time, thus replicating several clinical features of Parkinson's disease, a typical α-synucleinopathy. As Nurr1 represses α-synuclein, we evaluated whether unilateral transfected of rNurr1-V5 transgene via neurotensin-polyplex to the substantia nigra on day 30 after unilateral ß-sitosterol ß-D-glucoside lesion could affect bilateral neuropathology and sensorimotor deficits on day 30 post-transfection. This study found that rNurr1-V5 expression but not that of the green fluorescent protein (the negative control) reduced ß-sitosterol ß-D-glucoside-induced neuropathology. Accordingly, a bilateral increase in tyrosine hydroxylase-positive cells and arborization occurred in the substantia nigra and increased tyrosine hydroxylase-positive ramifications in the striatum. In addition, tyrosine hydroxylase-positive cells displayed less senescence marker ß-galactosidase and more neuron-cytoskeleton marker ßIII-tubulin and brain-derived neurotrophic factor. A significant decrease in activated microglia (positive to ionized calcium-binding adaptor molecule 1) and neurotoxic astrocytes (positive to glial fibrillary acidic protein and complement component 3) and increased neurotrophic astrocytes (positive to glial fibrillary acidic protein and S100 calcium-binding protein A10) also occurred in the substantia nigra. These effects followed the bilateral reduction in α-synuclein aggregates in the nigrostriatal system, improving sensorimotor behavior. Our results show that unilateral rNurr1-V5 transgene expression in nigral dopaminergic neurons mitigates bilateral neurodegeneration (senescence and loss of neuron-cytoskeleton and tyrosine hydroxylase-positive cells), neuroinflammation (activated microglia, neurotoxic astrocytes), α-synuclein aggregation, and sensorimotor deficits. Increased neurotrophic astrocytes and brain-derived neurotrophic factor can mediate the rNurr1-V5 effect, supporting its potential clinical use in the treatment of Parkinson's disease.

Metal-Organic Frameworks Based on a Janus-Head Biquinoline Ligand as Catalysts in the Transformation of Carbonyl Compounds into Cyanohydrins and Alcohols.

A new family of metal-organic frameworks (MOFs) named GR-MOFs with the chemical formula {[M x (BCA) y ](H2O) z (DMF) w } (x,y,z,w: 1,1,2,0; 1,1.5,0,1; 1,2,2,1; and 1,1,0,2 for GR-MOF-11 to 14, respectively) based on s-block [M: Sr (GR-MOF-11), Ba (GR-MOF-14)] and d-block [M: Y (GR-MOF-12) and Cd (GR-MOF-13)] metals together with the biquinoline ligand 2,2'-bicinchoninic acid (H2BCA) has been synthetized by a solvothermal route and fully characterized by elemental and thermogravimetric analysis, Fourier transform infrared spectroscopy, photoluminescence, particle size distribution through optical microscopy, electrophoretic mobility, and finally, X-ray single-crystal and powder diffraction. The structural characterization reveals that these 2D and 3D MOFs possess a rich variety of coordination modes that maintained the Janus-head topology on the ligand in most of the cases. The new MOFs were studied in the catalyzed cyanosilylation and hydroboration of an extensive group of aldehydes and ketones, wherein the s-block metal-based MOFs GR-MOF-11 and GR-MOF-14 provided the highest efficiency ever reported in the MOF-catalyzed cyanosilylation of carbonyl compounds by using only 0.5 mol % of catalyst loading, room temperature, and solvent-free conditions. Furthermore, the hydroboration of ketones has been reported for the first time with this type of s-block metal catalysts obtaining from moderate to good conversions.

Qualidade de Vida e Estratégias de Coping de Gestantes de Alto Risco e Risco Habitual / Calidad de vida y estrategias de afrontamiento de embarazadas de alto riesgo y riesgo habitual / Quality of life and coping strategies of high-risk and average-risk pregnant women

Resumo A gestação tem recebido pouca atenção quanto às modificações normais percebidas nos domínios físicos e psicológicos do estado da saúde da mulher e de sua qualidade de vida, embora seja um evento comum na vida reprodutiva feminina. O objetivo deste estudo foi avaliar a qualidade de vida e as estratégias de enfrentamento das gestantes de alto risco e risco habitual, do segundo e do terceiro trimestres de gestação, do município de Dourados, Mato Grosso do Sul, Brasil. Participaram 79 gestantes, das quais 32 eram de alto risco e 47, de risco habitual, com idade média de 24,6 anos; aplicou-se um questionário de qualidade de vida e outro de enfrentamento. As gestantes de alto risco apresentam maior qualidade de vida nos domínios saúde/funcionamento e família; desse modo, em todos os fatores significativos de enfrentamento. Observa-se a necessidade de acompanhamento dessas participantes em programas especiais inseridos no pré-natal, a fim de contribuir para o enfrentamento da gestação.

Resumen La gestación ha recibido poca atención en cuanto a las modificaciones percebidas en los dominios físico y psicológico del estado de la salud de la mujer y su calidad de vida, aun siendo un evento común en la vida reproductiva femenina. El propósito del estudio fue evaluar la calidad de vida y las estrategias de afrontamiento de gestantes de alto y habitual riesgo durante el segundo y tercer trimestres de gestación en el municipio de Dorados (Mato Grosso do Sul, Brasil). Participaron 79 gestantes, siendo 32 de alto riesgo y 47 de riesgo habitual, con promedio de edad de 24,6 años; a quienes se les aplicó un cuestionario de calidad de vida y otro de enfrentamiento. Las embarazadas de alto riesgo presentan mayor calidad de vida en los dominios de Salud/ Funcionamiento y Familia; asimismo, en todos los factores significativos de enfrentamiento. Se observa la necesidad de acompañamiento de las participantes en programas especiales que son incluidos en el prenatal con el fin de contribuir al enfrentamiento de la gestación.

Abstract Pregnancy has received little attention in terms of the perceived changes in the physical and psychological domain of women's health status and quality of life. The purpose of this study was to evaluate the quality of life and coping strategies of pregnant women during the second and third trimesters of pregnancy, in the municipality of Dourados (Mato Grosso do Sul). A total of 79 pregnant women participated in the study, 32 of whom were high-risk and 47 average risk, with an average age of 24.6 years; to whom a quality of life questionnaire and a coping questionnaire were applied. High-risk pregnant women have higher quality of life in the Health/Functioning and Family domains; likewise, in all the significant coping factors. It is observed the need to accompany participants in special programs that are included in the prenatal period in order to contribute to coping with pregnancy.

Intranigral Administration of ß-Sitosterol-ß-D-Glucoside Elicits Neurotoxic A1 Astrocyte Reactivity and Chronic Neuroinflammation in the Rat Substantia Nigra.

Chronic consumption of ß-sitosterol-ß-D-glucoside (BSSG), a neurotoxin contained in cycad seeds, leads to Parkinson's disease in humans and rodents. Here, we explored whether a single intranigral administration of BSSG triggers neuroinflammation and neurotoxic A1 reactive astrocytes besides dopaminergic neurodegeneration. We injected 6 µg BSSG/1 µL DMSO or vehicle into the left substantia nigra and immunostained with antibodies against tyrosine hydroxylase (TH) together with markers of microglia (OX42), astrocytes (GFAP, S100ß, C3), and leukocytes (CD45). We also measured nitric oxide (NO), lipid peroxidation (LPX), and proinflammatory cytokines (TNF-α, IL-1ß, IL-6). The Evans blue assay was used to explore the blood-brain barrier (BBB) permeability. We found that BSSG activates NO production on days 15 and 30 and LPX on day 120. Throughout the study, high levels of TNF-α were present in BSSG-treated animals, whereas IL-1ß was induced until day 60 and IL-6 until day 30. Immunoreactivity of activated microglia (899.0 ± 80.20%) and reactive astrocytes (651.50 ± 11.28%) progressively increased until day 30 and then decreased to remain 251.2 ± 48.8% (microglia) and 91.02 ± 39.8 (astrocytes) higher over controls on day 120. C3(+) cells were also GFAP and S100ß immunoreactive, showing they were neurotoxic A1 reactive astrocytes. BBB remained permeable until day 15 when immune cell infiltration was maximum. TH immunoreactivity progressively declined, reaching 83.6 ± 1.8% reduction on day 120. Our data show that BSSG acute administration causes chronic neuroinflammation mediated by activated microglia, neurotoxic A1 reactive astrocytes, and infiltrated immune cells. The severe neuroinflammation might trigger Parkinson's disease in BSSG intoxication.

Synthetic Monopartite Peptide That Enables the Nuclear Import of Genes Delivered by the Neurotensin-Polyplex Vector.

Neurotensin (NTS)-polyplex is a multicomponent nonviral vector that enables gene delivery via internalization of the neurotensin type 1 receptor (NTSR1) to dopaminergic neurons and cancer cells. An approach to improving its therapeutic safety is replacing the viral karyophilic component (peptide KPSV40; MAPTKRKGSCPGAAPNKPK), which performs the nuclear import activity, by a shorter synthetic peptide (KPRa; KMAPKKRK). We explored this issue and the mechanism of plasmid DNA translocation through the expression of the green fluorescent protein or red fluorescent protein fused with KPRa and internalization assays and whole-cell patch-clamp configuration experiments in a single cell together with importin α/ß pathway blockers. We showed that KPRa electrostatically bound to plasmid DNA increased the transgene expression compared with KPSV40 and enabled nuclear translocation of KPRa-fused red fluorescent proteins and plasmid DNA. Such translocation was blocked with ivermectin or mifepristone, suggesting importin α/ß pathway mediation. KPRa also enabled NTS-polyplex-mediated expression of reporter or physiological genes such as human mesencephalic-derived neurotrophic factor (hMANF) in dopaminergic neurons in vivo. KPRa is a synthetic monopartite peptide that showed nuclear import activity in NTS-polyplex vector-mediated gene delivery. KPRa could also improve the transfection of other nonviral vectors used in gene therapy.

Influence of the Covid-19 pandemic on out-of-hospital cardiac arrest. A Spanish nationwide prospective cohort study.

AIMS: The influence of the COVID-19 pandemic on attendance to out-of-hospital cardiac arrest (OHCA) has only been described in city or regional settings. The impact of COVID-19 across an entire country with a high infection rate is yet to be explored. METHODS: The study uses data from 8629 cases recorded in two time-series (2017/2018 and 2020) of the Spanish national registry. Data from a non-COVID-19 period and the COVID-19 period (February 1st-April 30th 2020) were compared. During the COVID-19 period, data a further analysis comparing non-pandemic and pandemic weeks (defined according to the WHO declaration on March 11th, 2020) was conducted. The chi-squared analysis examined differences in OHCA attendance and other patient and resuscitation characteristics. Multivariate logistic regression examined survival likelihood to hospital admission and discharge. The multilevel analysis examined the differential effects of regional COVID-19 incidence on these same outcomes. RESULTS: During the COVID-19 period, the incidence of resuscitation attempts declined and survival to hospital admission (OR = 1.72; 95%CI = 1.46-2.04; p < 0.001) and discharge (OR = 1.38; 95%CI = 1.07-1.78; p = 0.013) fell compared to the non-COVID period. This pattern was also observed when comparing non-pandemic weeks and pandemic weeks. COVID-19 incidence impinged significantly upon outcomes regardless of regional variation, with low, medium, and high incidence regions equally affected. CONCLUSIONS: The pandemic, irrespective of its incidence, seems to have particularly impeded the pre-hospital phase of OHCA care. Present findings call for the need to adapt out-of-hospital care for periods of serious infection risk. STUDY REGISTRATION NUMBER: ISRCTN10437835.

Unilateral intranigral administration of ß-sitosterol ß-D-glucoside triggers pathological α-synuclein spreading and bilateral nigrostriatal dopaminergic neurodegeneration in the rat.

The spreading and accumulation of α-synuclein and dopaminergic neurodegeneration, two hallmarks of Parkinson's disease (PD), have been faithfully reproduced in rodent brains by chronic, oral administration of ß-sitosterol ß-D-glucoside (BSSG). We investigated whether a single injection of BSSG (6 µg BSSG/µL DMSO) in the left substantia nigra of Wistar rats causes the same effects. Mock DMSO injections and untreated rats formed control groups. We performed immunostainings against the pathological α-synuclein, the dopaminergic marker tyrosine hydroxylase (TH), the neuroskeleton marker ß-III tubulin, the neurotensin receptor type 1 (NTSR1) as non-dopaminergic phenotype marker and Fluro-Jade C (F-J C) label for neurodegeneration. Using ß-galactosidase (ß-Gal) assay and active caspase-3 immunostaining, we assessed cell death mechanisms. Golgi-Cox staining was used to measure the density and types of dendritic spines of striatal medium spiny neurons. Motor and non-motor alterations were also evaluated. The study period comprised 15 to 120 days after the lesion. In the injured substantia nigra, BSSG caused a progressive α-synuclein aggregation and dopaminergic neurodegeneration caused by senescence and apoptosis. The α-synuclein immunoreactivity was also present within microglia cells. Decreased density of dopaminergic fibers and dendritic spines also occurred in the striatum. Remarkably, all the histopathological changes also appeared on the contralateral nigrostriatal system, and α-synuclein aggregates were present in other brain regions. Motor and non-motor behavioral alterations were progressive. Our data show that the stereotaxic BSSG administration reproduces PD α-synucleinopathy phenotype in the rat. This approach will aid in identifying the spread mechanism of α-synuclein pathology and validate anti-synucleinopathy therapies.

A sequential methodology for integral evaluation of motor and non-motor behaviors in parkinsonian rodents.

An animal model, suitable for resembling Parkinson's disease (PD) progress, should show both, motor and non-motor alterations. However, these features have been scarcely evaluated or developed in parkinsonian models induced by neurotoxins. This protocol provides modifications to original methods, allowing six different motor and non-motor behavior tests, which adequately and timely emulate the main parkinsonian sensorimotor alterations in the rat or mouse: (1) bilateral sensorimotor alterations, examined by the vibrissae test; (2) balance and motor coordination, evaluated by the uncoordinated gait test; (3) locomotor asymmetry, analyzed by the cylinder test; (4) bradykinesia, as a locomotor alteration evidenced by the open field test; (5) depressive-like behavior, judged by the forced swimming test; and (6) hyposmia, assessed by the olfactory asymmetry test. Some advantages of using these behavioral tests over others include:•No sophisticated materials or equipment are required for their application and evaluation.•They are used in rodent models for parkinsonian research, but they can also be helpful for studying other movement disorders.•These tests can accurately discriminate the affected side from the healthy one, after unilateral injury of one hemisphere, resulting in sensorimotor, olfactory or locomotor asymmetry.

A single intranigral administration of ß-sitosterol ß-d-glucoside elicits bilateral sensorimotor and non-motor alterations in the rat.

Parkinson's disease (PD) is a progressive neuropathology characterized by motor and non-motor alterations. ß-sitosterol ß-d-glucoside (BSSG) is a neurotoxin whose prolonged oral administration in rats has been proposed as a new PD model. Herein, we demonstrate that a single, unilateral, and intranigral administration of BSSG also elicits bilateral sensorimotor alterations in the rat. Six behavioral tests evaluated the effect of different concentrations of BSSG (3, 6, 9, and 12 µg/µL DMSO) from 15 to 120 days after administration. The first behavioral alterations, which appeared on day 15, were unbalanced and uncoordinated gaits and a decrease in the sensorimotor cortex activity, as evidenced by the beam-walking and the vibrissae tests, respectively. After 30 days, the corridor test revealed hyposmia and a decreased locomotor activity in the open field. The last alteration was a depressive-like behavior, as shown by the forced swim test on days 60 and 120. According to the cylinder test, no locomotor asymmetry was observed over time with any BSSG concentrations tested. Also, a mesencephalic TH(+) cell loss (p < 0.05) was shown on day 30 when compared with the mock condition, and such a loss was even higher on day 120. At this time, the presence of pathological α-synuclein aggregates in the mesencephalon was documented. Our results show that the stereotaxic intranigral administration of BSSG reproduces some characteristics of oral administration, such as the progression of behavioral alterations, dopaminergic neurons loss, and the presence of Lewy body-like synuclein aggregations, in less time and resources.

Effects of genetic deletion versus pharmacological blockade of the LPA1 receptor on depression-like behaviour and related brain functional activity.

Animal models of psychopathology are particularly useful for studying the neurobiology of depression and characterising the subtypes. Recently, our group was the first to identify a possible relationship between the LPA1 receptor and a mixed anxiety-depression phenotype. Specifically, maLPA1-null mice exhibited a phenotype characterised by depressive and anxious features. However, the constitutive lack of the gene encoding the LPA1 receptor (Lpar1) can induce compensatory mechanisms that might have resulted in the observed deficits. Therefore, in the present study, we have compared the impact of permanent loss and acute pharmacological inhibition of the LPA1 receptor on despair-like behaviours and on the functional brain map associated with these behaviours, as well as on the degree of functional connectivity among structures. Although the antagonist (intracerebroventricularly administered Ki16425) mimicked some, but not all, effects of genetic deletion of the LPA1 receptor on the results of behavioural tests and engaged different brain circuits, both treatments induced depression-like behaviours with an agitation component that was linked to functional changes in key brain regions involved in the stress response and emotional regulation. In addition, both Ki16425 treatment and LPA1 receptor deletion modified the functional brain maps in a way similar to the changes observed in depressed patients. In summary, the pharmacological and genetic approaches could ultimately assist in dissecting the function of the LPA1 receptor in emotional regulation and brain responses, and a combination of those approaches might provide researchers with an opportunity to develop useful drugs that target the LPA1 receptor as treatments for depression, mainly the anxious subtype.This article has an associated First Person interview with the first author of the paper.

[Use of new technologies by adolescents in the search for health information]. / Uso de Internet por los adolescentes en la búsqueda de información sanitaria.

OBJECTIVE: To describe Internet sources used by adolescents to consult health information and their sociodemographic characteristics, as well as to identify the variables that influence the choice of Internet site. DESIGN: Cross-sectional descriptive study. Survey adapted from the questionnaire validated by Rideout. PARTICIPANTS AND LOCATION: Adolescents aged 12-18 from 4schools in rural municipalities. RESULTS: The study included a total of 405 adolescents, of whom 51.6% were female, age 14.9 ± 1.2 years. Most of them (87.25%) live with both parents, and 93.6% have computers at home, with 45.2% in their rooms, and a mean of 2.1 computers/home. The large majority (85.2%) have Internet at home, with 76.3% in their room. A total of 53.8% sought health information 0.71 ± 0.91 h/week, seeking mainly information on: cancer (89.9%), addictions (67.7%), STIs and HIV (49.6%), pregnancies/contraception (21, 5%), mental illness (40%), heart disease and diabetes mellitus (53.6%), and eating disorders (39.3%). Google was chosen by 63.2%, and only 11.9% chose medical websites. Information was shared on social networks by 12.8% (70.3% Facebook). The information found led to a change of behaviour in 70.7%. Just over half (56.05%) preferred to use the Internet for: speed, 34.8%, privacy, 15.8%, reliability, 13.6%, and more information, 17.6%. CONCLUSIONS: Adolescents seek information mainly through Google, with no knowledge of systems that accredit content quality, but consider it useful and reliable, changing their behaviour patterns according to the information found. All this carries a risk in this age group with very sensitive characteristics. Therefore, we believe that we should continue along the line of designing other alternative communication channels adapted to their current reality.

Fractura aislada del cuerpo del hueso ganchoso / Isolated fracture of the body of the hamate bone

Las fracturas del hueso ganchoso son muy poco frecuentes, constituyendo alrededor del 2% de todas las fracturas del carpo. Debido a su baja frecuencia y a lo inespecífico de las manifestaciones clínicas, su diagnóstico suele ser difícil. Es importante considerar su presencia ante un traumatismo directo sobre la mano. Debe estudiarse inicialmente con radiografía de mano. Si es necesario confirmar el diagnóstico o valorar las lesiones asociadas, se sugiere la tomografía axial computarizada. La decisión terapéutica depende del grado de conminución de la fractura, de su estabilidad y de la presencia de compromiso articular. Se presenta el caso de un varón de 19 años que sufrió fractura aislada del cuerpo del hueso ganchoso.

Fractures of the hamate bone are very infrequent, representing approximately 2% of the carpal fractures. Due to its infrequency and to the non-specificity of its clinical manifestations, they are usually difficult to diagnose. Is important to consider its presence when a direct trauma over hand occurs. Study should start with X ray of the hand. If necessary to confirm the diagnosis or assess associated lesions, computed tomography is suggested. The therapeutic management depends on the degree of comminution of the fracture, its stability and any joint involvement. We present a case of a 19 year old male who suffered an isolated fracture of the body of the hamate bone.

Hibiscus chlorotic ringspot virus coat protein is essential for cell-to-cell and long-distance movement but not for viral RNA replication.

Hibiscus chlorotic ringspot virus (HCRSV) is a member of the genus Carmovirus in the family Tombusviridae. In order to study its coat protein (CP) functions on virus replication and movement in kenaf (Hibiscus cannabinus L.), two HCRSV mutants, designated as p2590 (A to G) in which the first start codon ATG was replaced with GTG and p2776 (C to G) in which proline 63 was replaced with alanine, were constructed. In vitro transcripts of p2590 (A to G) were able to replicate to a similar level as wild type without CP expression in kenaf protoplasts. However, its cell-to-cell movement was not detected in the inoculated kenaf cotyledons. Structurally the proline 63 in subunit C acts as a kink for ß-annulus formation during virion assembly. Progeny of transcripts derived from p2776 (C to G) was able to move from cell-to-cell in inoculated cotyledons but its long-distance movement was not detected. Virions were not observed in partially purified mutant virus samples isolated from 2776 (C to G) inoculated cotyledons. Removal of the N-terminal 77 amino acids of HCRSV CP by trypsin digestion of purified wild type HCRSV virions resulted in only T = 1 empty virus-like particles. Taken together, HCRSV CP is dispensable for viral RNA replication but essential for cell-to-cell movement, and virion is required for the virus systemic movement. The proline 63 is crucial for HCRSV virion assembly in kenaf plants and the N-terminal 77 amino acids including the ß-annulus domain is required in T = 3 assembly in vitro.

Yellowing disease in zucchini squash produced by mixed infections of Cucurbit yellow stunting disorder virus and Cucumber vein yellowing virus.

Zucchini squash is host to Cucurbit yellow stunting disorder virus (CYSDV), a member of the genus Crinivirus, and Cucumber vein yellowing virus (CVYV), a member of the genus Ipomovirus, both transmitted by the whitefly Bemisia tabaci. Field observations suggest the appearance of new symptoms observed on leaves of zucchini squash crops when both viruses were present. When infected during controlled experiments with CYSDV only, zucchini plants showed no obvious symptoms and the virus titer decreased between 15 and 45 days postinoculation (dpi), after which it was no longer detected. CVYV caused inconspicuous symptoms restricted to vein clearing on some of the apical leaves and the virus accumulated progressively between 15 and 60 dpi. Similar accumulations of virus followed single inoculations with the potyvirus Zucchini yellow mosaic virus (ZYMV) and plants showed severe stunting, leaf deformation, and mosaic yellowing. However, in mixed infections with CYSDV and CVYV, intermediate leaves showed chlorotic mottling which evolved later to rolling, brittleness, and complete yellowing of the leaf lamina, with exception of the veins. No consistent alteration of CVYV accumulation was detected but the amounts of CYSDV increased ≈100-fold and remained detectable at 60 dpi. Such synergistic effects on the titer of the crinivirus and symptom expression were not observed when co-infected with ZYMV.

Se puede prevenir la depresión en los adolescentes?: un estudio piloto / Can depression be prevented in adolescents?: a plilot study

Objetivo: Informar los resultados de un estudio piloto que probó la aplicabilidad, eficacia y aceptabilidad de un programa diseñado para prevenir la depresión en estudiantes secundarios. Metodología: El estudio se llevó a cabo en la comuna de San Bernardo. Se usó una metodología mixta: cualitativa y cuantitativa. Se llevó a cabo un ensayo clínico controlado con dos ramas y grupos focales. La muestra estuvo constituida por tres colegios municipales, cuatro clases de 1º Medio en el grupo activo y tres en el grupo control. La intervención de la rama activa consistió en un programa de 11 sesiones, liderado por dos profesionales jóvenes. Resultados: La muestra estuvo constituida por 277 escolares de 1º Medio, 163 en el grupo activo y 114 en el grupo control. La edad promedio de la muestra fue de 14,5 años (DE=0,6). En el diagnóstico basal, el grupo activo no se diferenció significativamente del grupo control en relación a la edad ni al nivel de sintomatología depresiva. En el grupo activo, el puntaje del BDI-II inicialmente fue de 10,7 (IC 95%=9,0 a 12,4), aumentó al término de la intervención a 11,5 (IC 95%=9,7 a 13,4) y a los 6 meses fue de 9,2 (IC 95 por ciento =7,5 a 10,9). En el grupo control, el promedio en el BDI-II fue de 9,2 (IC 95 por ciento =7,6-10,8); 8,0 (IC 95 por ciento =6,3 a 9,6) y 8,6 (IC 95 por ciento =6,1 a 11,1), respectivamente. No hubo diferencias estadísticamente significativas en los resultados entre ambos grupos en la sintomatología depresiva. Sin embargo, la intervención actuó como un factor protector para depresión (OR=0,39; IC 95%=0,19 a 0,79). En la evaluación cualitativa, los participantes calificaron positivamente el taller. Conclusiones: El estudio piloto demostró que es posible aplicar programas de este tipo en los colegios con buena aceptabilidad de los adolescentes. La resultados hasta el seguimiento a 6 meses sugieren que la intervención podría reducir la aparición de nuevos casos de depresión.

Objective: To report the results of a pilot study that tested the applicability, efficacy and acceptability of a program designed to prevent depression among secondary school students. Methodology: The study was conducted in the borough of San Bernardo. A mixed methodology was used: qualitative and quantitative. A randomized controlled trial was carried out with two arms and focus groups. The sample included three state funded schools, four 9th grade classes and three in the control group. The intervention in the active arm was an 11-session program led by two young professionals. Results: The sample constituted 277 students, 163 in the active group and 114 in the control group. The mean age of the sample was 14.5 years (SD=0.6). In the baseline diagnosis, the active group did not differ significantly from the control group regarding age and level of depressive symptoms. In the active group, the BDI-II score was initially 10.7 (95 percent CI=9.0 to 12.4) which increased at the end of the intervention to 11.5 (95 percent CI=9.7 to 13.4) and at the 6 months assessment was 9.2 (95 percent CI=7.5 to 10.9). In the control group, the BDI-II mean score was 9.2 (95 percent CI=7.6 to 10.8); 8.0 (95 percent CI=6.3 to 9.6) and 8.6 (95 percent CI=6.1 to 11.1), respectively. There were no statistically significant differences in the depressive symptoms measured between the control and active groups. However, the intervention acted as a protective factor for depression (OR=0.39; CI 95 percent =0.19 to 0.79). In the qualitative evaluation, participants appraised the program positively. They expressed greater interest in the sessions related to problem-solving strategies. Conclusions: This pilot study demonstrated that it is possible to implement programs like this in schools with good acceptance. The results reached at the time of the 6-month follow-up appear to suggest that the intervention could reduce new cases of depression.

Biological properties of the Chilean native moss Sphagnum magellanicum.

An ethanol extract prepared from the gametophyte Chilean native moss Sphagnum magellanicum was dried out, weighed and dissolved in distilled water. This extract was then assayed for its antibacterial activity against the G(-) bacteria Azotobacter vinelandii, Erwinia carotovora subsp. carotovora, Enterobacter aerogenes, Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi, Vibrio cholerae, and the G(+) bacteria Staphylococcus aureus subsp. aureus, and Streptococcus type beta. The growth of the cultures of E. carotovora subsp. carotovora, and V. cholerae was inhibited at a concentration of 581 microg/ml of extract, while the cultures of E. coli, S. typhi and Streptococcus type beta were inhibited at a concentration of 1.16 microg/mL of extract. The concentration of phenolic compounds was 4.294 mg/mL; the presence of vanillic, chlorogenic, syringic, caffeic, gallic, 3-4 hydrozybenzoic, p-coumaric and salicylic acids was identified using RP- High Pressure Liquid Chromatography.

Composición del Locus de control en dos ciudades latinoamericanas / Composition the locus of control in two latinoamerican cities

El locus de control es un rasgo de personalidad vinculado con la atribución que hacen los individuos acerca de sus éxitos y fracasos. Los estudios en diferentes naciones y sociedades han demostrado que existen características generales y particulares respecto a la percepción de control y donde la cultura juega un papel importante. Se partió del objetivo de conocer la composición factorial del locus de control en dos poblaciones, Hermosillo, Sonora (México) (n=600) y João Pessoa, Paraíba (Brasil) (n=600); y establecer las diferencias en cuanto a dicho constructo en ambas poblaciones con respecto a las variables atributivas: edad, escolaridad, ocupación y ciudad. Los resultados revelan tres dimensiones comunes a las dos poblaciones: locus de control interno, locus de control afiliativo y locus de control externo. Los datos en general hacen ver que las muestras poblacionales de las ciudades hacen juicios de control en relación a los esfuerzos y el trabajo personal, en la afiliación a colectivos y grupos de interés como los fundamentos de explicación para éxitos y fracasos.

The locus of control is a personality trait linked to the attribution people make concerning their success and failures. Research in nations and societies has demonstrated that there exist general and particular characteristics about control perception, where culture plays an important role. The initial objective was to know the factorial composition about locus of control in two groups located in Hermosillo, Sonora México (n=600) and João Pessoa, Paraíba. Brazil (n=600); then, to establish the differences of the construct between the groups concerning the attribute variables: age, education level, occupation and city. The results show three dimensions in the two groups: internal, affiliation and external locus of control. The general data suggest that the population samples of the cities make control judgements related with efforts and personal work, affiliation to collectives and groups of interest as the basis for explaining their success and failures.