Effects of nutritional profile system and front labeling in food selection during purchases: a systematic review / Efecto de los sistemas de perfilado nutricional y etiquetado frontal en la selección de alimentos durante la compra: una revisión sistemática

Introduction. Nutritional profiling systems (NPS) are mainly used in front-end labeling policies in order to make the purchase and consumption choice conscious and healthy. Objetive. This study systematically reviewed evidence from interventions on the effect of NPS in the front-of- package on food purchases. Materials and methods. A bibliographic search was carried out in electronic sources from Medline, Elsevier, Scielo and Lilacs, of experimental studies and intervention between 2012 and 2022. A total of 14 articles were included in the review. They were analyzed according to the intervention modality used: 4 studies analyzed the effect of NPS in a real purchase situation and 10 evaluated purchase perception/intention. Results. According to the modality of intervention, the 6 studies that analyzed the NPS-warning system, all recorded healthier purchases compared to the control groups. While for the NPS-NutriScore, Health Star Rating and Multiple Traffic Lights were effective in the decision to purchase healthier foods, in 5 of 7 studies for the first NPS, in 4 of 7 for the second and in 4 of 8 for the third, compared with control groups. Conclusions. Findings of this study suggest that NPSs may be effective for healthy purchase choices, even so it is necessary to strengthen the system and policies with nutritional food education campaigns(AU)

Introducción. Los sistemas de perfilado nutricional (SPN) son utilizados principalmente en políticas de etiquetado frontal con la finalidad de que la elección de compra y consumo sea consciente y saludable. Objetivo. Este estudio revisó sistemáticamente la evidencia de las intervenciones sobre el efecto de SPN en el frente del paquete en las compras de alimentos. Materiales y métodos. Se realizó una búsqueda bibliográfica en fuentes electrónicas de Medline, Elsevier, Scielo y Lilacs, de estudios experimentales e intervenciones entre 2012 y 2022. Se incluyeron un total de 14 artículos en la revisión. Fueron analizados según la modalidad de intervención utilizada: 4 estudios analizaron el efecto de los SPN en una situación de compra real y 10 evaluaron percepción/intención de compra. Resultados. Según la modalidad de intervención, los 6 estudios que analizaron el SPN-sistema de advertencia, todos registraron compras más saludables en comparación con grupo controles. Mientras que para los SPN-NutriScore, Estrellas de Salud y Semáforo Tricolor Múltiple fueron efectivas en la decisión de compra de alimentos más saludables, en 5 de 7 estudios para el primer SPN, en 4 de 7 para el segundo y en 4 de 8 para el tercero, comparados con grupo controles. Conclusiones. Los hallazgos de este estudio sugieren que los SPN pueden ser efectivos para elecciones de compras saludables, aun así, es necesario reforzar el sistema y las políticas con campañas de educación alimentaria nutricional(AU)

Research progress on sex-hormone-like effects of epimedium / 国际中医中药杂志

Epimedii folium is a commonly used Traditional Chinese Medicine (TCM) for warming the kidney and strengthening the yang qi. It has androgen-estrogen-like effect. It can not only directly act on sexual organs to regulate hormone levels, but also exert sex-hormone-like effect through hypothalamus-pituitary-gonadal axis. Its regulation of hormone levels is similar to that of plant hormones. At present, Epimedii folium is commonly used with other TCMs to treat diseases caused by sex-hormone deficiency, such as male spermatopenia, asthenospermia, benign prostatic hyperplasia, functional erectile dysfunction, female premature ovarian failure, perimenopausal syndrome, dysfunctional infertility during ovulation, hyperandrogenemia of PCOS patients, etc.

Avaliação do impacto de intervenção educativa em farmácias com promoção comercial de produtos que competem com o aleitamento materno / Impact assessment of an educational intervention in pharmacies that use commercial promotion of products competing with maternal breastfeeding / Evaluación del impacto de una intervención educativa en farmacias con promoción comercial de productos que compiten con la lactancia materna

A Norma Brasileira de Comercialização de Alimentos para Lactentes e Crianças de Primeira Infância, Bicos, Chupetas e Mamadeiras (Lei Federal nº 11.265/2006) visa controlar o marketing abusivo de produtos que competem com o aleitamento materno. O objetivo foi avaliar o impacto de uma intervenção educativa sobre o cumprimento da Lei em farmácias. Pesquisa de intervenção randomizada conduzida em 155 farmácias que infringiam a Lei na Zona Sul do Rio de Janeiro, Brasil. A prática comercial das farmácias foi avaliada antes e depois da intervenção com o farmacêutico e com o gerente, comparados ao grupo controle. O intervalo entre a intervenção e a segunda avaliação foi de um mês. Para aferir as mudanças no quantitativo de farmácias com infração à Lei, antes e depois da intervenção, foi utilizado o teste de McNemar. O teste de Wilcoxon foi usado para comparar a variação no número de infrações em cada grupo de alocação. Um mês após a intervenção houve redução de 16,1% (n = 25) no total de farmácias com infração. Houve redução de 18,7% para 12,9% em produtos cuja promoção comercial é proibida (p = 0,093) e de 92,9% para 80,5% nos produtos lácteos (p = 0,001), mas entre alimentos de transição houve aumento de 28,5% para 42,3% de farmácias com promoção ilegal (p = 0,006). O grupo intervenção com farmacêutico apresentou redução estatisticamente significativa nas infrações relacionadas a descontos de preço (p = 0,022) e a exposições especiais (p = 0,002). A intervenção educativa reduziu a quantidade de farmácias que infringia essa Lei, principalmente quando esta intervenção foi realizada com o farmacêutico.

The Brazilian Code of Marketing of Infant and Toddlers Food, Nipples, Pacifiers, and Baby Bottles (Federal Law n. 11,265/2006) aims to control the abusive marketing of products that compete with breastfeeding. The objective was to assess the impact of an educational intervention on compliance with this law by pharmacies. A randomized intervention study was conducted in 155 pharmacies that were infringing the law in the Southern Zone of Rio de Janeiro, Brazil. The pharmacies' commercial practices were assessed before and after the intervention with the pharmacist and manager, compared to the control group. The interval between the intervention and the second assessment was one month. McNemar test was used to measure changes in the number of pharmacies infringing the law before and after the intervention. Wilcoxon test was used to compare variation in the number of violations in each group. A month after the intervention, there was a 16.1% reduction (n = 25) in the number of pharmacies committing violations. There was a decrease from 18.7% to 12.9% in products whose commercial promotion is banned by the law (p = 0.093) and from 92.9% to 80.5% in milk products (p = 0.001), but among processed complementary food there was an increase from 28.5% to 42.3% of pharmacies with illegal promotions (p = 0.006). The intervention group with the pharmacists showed a statistically significant reduction in violations related to discount prices (p = 0.022) and special displays (p = 0.002). The educational intervention reduced the number of pharmacies that infringed the law, mainly when the intervention involved the pharmacist.

La Norma Brasileña de Comercialización de Alimentos para Lactantes y Niños de la Primera Infancia, Tetillas, Chupetes y Biberones (Ley Federal nº 11.265/2006) tiene como finalidad controlar el márketing abusivo de productos que compiten con la lactancia materna. El objetivo fue evaluar el impacto de una intervención educativa sobre el cumplimiento de la ley en farmacias. Se realizó una investigación de intervención aleatoria, llevada a cabo en 155 farmacias que infringían la ley en la zona sur de Río de Janeiro, Brasil. La práctica comercial de las farmacias fue evaluada antes y después de la intervención con el farmacéutico y con el gerente, comparadas con el grupo de control. El intervalo entre la intervención y la segunda evaluación fue de un mes. Para evaluar los cambios en lo cuantitativo de farmacias con infracción a la ley, antes y después de la intervención, se utilizó el test de McNemar. El test de Wilcoxon se utilizó para comparar la variación en el número de infracciones en cada grupo de asignación. Tras un mes de la intervención hubo una reducción de un 16,1% (n = 25) en el total de farmacias con infracción. Hubo una reducción desde un 18,7% a un 12,9% en productos cuya promoción comercial está prohibida (p = 0,093) y de un 92,9% a un 80,5% en productos lácteos (p = 0,001). Sin embargo, entre alimentos de transición hubo un aumento de un 28,5% a un 42,3% de farmacias con promoción ilegal (p = 0,006). El grupo de intervención con el farmacéutico presentó una reducción estadísticamente significativa en las infracciones relacionadas con descuentos de precio (p = 0,022) y respecto a exposiciones especiales (p = 0,002). La intervención educativa redujo la cantidad de farmacias que infringía esta ley, principalmente cuando la intervención educativa se realizó con el farmacéutico.

Estudos descritivos e experimentais em contextos aplicados: dados científicos e impacto prático / Descriptive and experimental studies in applied contexts / Estudios descriptivos y experimentales en contextos aplicados

O presente artigo se propôs apresentar, a partir de levantamento bibliográfico em periódicos, livros e capítulos de livro, dados da produção intelectual docente e discente oriundos do Programa Stricto Sensu em Psicologia da PUC Goiás, entre os anos 2003 e 2019. Os dados dos estudos possibilitaram ilustrar características do modo de fazer ciência em análise do comportamento aplicada, com destaque a seus métodos e princípios, e ao comportamento-alvo sob estudo. Também permitiram discutir o impacto prático desses estudos. Os resultados mostraram uma maior concentração de estudos descritivos e/ou experimentais em periódicos que abarcam diferentes aspectos do comportamento emitidos por pessoas diagnosticadas com algum transtorno mental, assim como por pessoas que não apresentam diagnóstico psiquiátrico, os quais estavam sob controle de variáveis ambientais testadas nas condições experimentais.

This article aims at presenting the intellectual research of professors and students from the Psychology University of PUC Goiás between the years of 2003 and 2019. The findings made possible to exemplify the human behavior analysis science, highlighting its methods and principles, as well as the target behavior under study. The findings also allowed a discussion of the practical impact of these studies. The results showed a greater concentration of descriptive and/or experimental studies in journals covering different behavioral aspects from people diagnosed with some mental disorder, as well as people who did not present any psychiatric diagnosis but were under control of environmental variables tested in experimental conditions.

El presente artículo se propuso presentar, a partir de levantamiento bibliográfico en periódicos, libros y capítulos de libro, datos de la producción intelectual docente y discente oriundos del Programa Stricto Sensu en Psicología de la PUC Goiás, entre los años 2003 y 2019. Los datos de los estudios que posibilitaron ilustrar características del modo de hacer ciencia en análisis del comportamiento aplicado, con destaque a sus métodos y principios, y al comportamiento objetivo en estudio. También permitieron discutir el impacto práctico de estos estudios. Los resultados mostraron una mayor concentración de estudios descriptivos y/o experimentales en periódicos que abarcan diferentes aspectos del comportamiento emitidos por personas diagnosticadas con algún trastorno mental, así como por personas que no presentan diagnóstico psiquiátrico, los cuales estaban bajo control de variables ambientales probadas en las condiciones experimentales.

Immunogenicity analysis of sequential inoculation of different strains of poliomyelitis vaccines in Shanghai / 中华预防医学杂志

Objective@#To evaluate the immunogenicity of different strains of inactivated poliomyelitis vaccines (IPV) by sequential program.@*Methods@#This parallel-group controlled trial was conducted in immunization clinics in Shanghai from March 2016 to September 2017. Sabin strains inactivated poliomyelitis vaccines (sIPV), WPV strains inactivated poliomyelitis vaccines (wIPV) and live poliomyelitis Type Ⅰ Type Ⅲ vaccine (bOPV) as the investigational vaccine were used at 2, 3, 4 months old in 325 infants in Shanghai. Infants vaccinated by four sequential program were divided into 4 groups: sIPV+sIPV+bOPV, sIPV+wIPV+bOPV, wIPV+sIPV+bOPV and wIPV+wIPV+bOPV. A total of 230 investigators′ blood samples were collected before primary immunization and 163 investigators′ blood samples were collected after primary immunization. A total of 151 investigators (36, 44, 30 and 41 in each group) finished primary immunization and blood sampling before and after the primary immunization. The geometric mean titer (GMT) of poliovirus typesⅠ and Ⅲ neutralizing antibody was tested and calculated, and the positive results of antibody before and after primary immunization were analyzed.@*Results@#Among the 151 investigators, the age were (2.27±0.61) months and birth weight were (3.27±0.43) kg, and 70 were male. The positive rates of typeⅠwas 98.68% (149 cases), and type Ⅲ was 97.35% (147 cases); the number of investigators tested in each group was 36, 44, 30 and 41, respectively; the positive rates of typeⅠwas 97.22% (35 cases), 100.00% (44 cases), 96.67% (29 cases) and 100.00% (41 cases) (P=0.345); the positive rates of type Ⅲ were 97.22% (35 cases), 95.45% (42 cases), 96.67% (29 cases) and 100.00% (41 cases) (P=0.614).@*Conclusion@#Using sIPV and wIPV simultaneously or alternately for sequential immunization of poliomyelitis vaccines showed good immunogenicity for infants at appropriate age.

Interventions to reduce accidents in childhood: a systematic review / Intervenções para redução de acidentes na infância: revisão sistemática

Abstract Objective: To review the literature on interventions planned to prevent the incidence of injuries in childhood. Source of data: The PubMed, Web of Science, and Bireme databases were searched by two independent reviewers, employing the single terms accidents, accident, injuries, injury, clinical trial, intervention, educational intervention, and multiple interventions, and their combinations, present in the article title or abstract, with no limits except period of publication (2006-2016) and studies in human subjects. Synthesis of data: Initially, 11,097 titles were located. Fifteen articles were selected for the review. Eleven were randomized trials (four carried out at the children's households, five in pediatric healthcare services, and two at schools), and four were non-randomized trials carried out at the children's households. Four of the randomized trials were analyzed by intention-to-treat and a protective effect of the intervention was observed: decrease in the number of risk factors, decrease in the number of medical consultations due to injuries, decrease in the prevalence of risk behaviors, and increase of the parents' knowledge regarding injury prevention in childhood. Conclusion: Traumatic injuries in childhood are amenable to primary prevention through strategies that consider the child's age and level of development, as well as structural aspects of the environment.

Resumo Objetivo: Revisar a literatura sobre intervenções voltadas à prevenção de acidentes na infância. Fonte dos dados: As bases PubMed, Web of Science e Bireme foram rastreadas por dois revisores independentes, com os termos accidents, accident, injuries, injury, clinical trial, intervention, educational intervention e multiple interventions, e suas combinações, presentes no título ou resumo do artigo, sem limites, exceto o período de publicação (2006-2016), e estudos realizados em humanos. Síntese dos dados: Foram localizados inicialmente 11.097 títulos. Foram selecionados 15 artigos para esta revisão, dos quais 11 eram ensaios randomizados (quatro feitos em domicílios, cinco em serviços de saúde e dois em escolas) e quatro, ensaios não randomizados realizados em domicílios. Quatro dos estudos randomizados foram analisados por intenção de tratar e mostraram efeito favorável da intervenção: redução de fatores de risco para acidentes, diminuição do número de atendimentos médicos por acidentes, menor frequência de comportamentos de risco e maior conhecimento dos pais sobre prevenção de acidentes na infância. Conclusão: As lesões traumáticas na infância são passíveis de prevenção primária por meio de estratégias que levem em conta a idade e o nível de desenvolvimento da criança, bem como aspectos estruturais do ambiente.

Evaluation of the Facial Recess and Cochlea on the Temporal Bone of Stillbirths regarding the Percutaneous Cochlear Implant

Abstract Introduction The literature shows that there are anatomical changes on the temporal bone anatomy during the first four years of life in children. Therefore, we decided to evaluate the temporal bone anatomy regarding the cochlear implant surgery in stillbirths between 32 and 40 weeks of gestational age using computed tomography to simulate the trajectory of the drill to the scala timpani avoiding vital structures. Objectives To measure the distances of the simulated trajectory to the facial recess, cochlea, ossicular chain and tympanic membrane, while performing the minimally invasive cochlear implant technique, using the Improvise imaging software (Vanderbilt University, Nashville, TN, US). Methods An experimental study with 9 stillbirth specimens, with gestational ages ranging between 32 and 40 weeks, undergoing tomographic evaluation with individualization and reconstruction of the labyrinth, facial nerve, ossicular chain, tympanic membrane and cochlea followed by drill path definition to the scala tympani. Improvise was used for the computed tomography (CT) evaluation and for the reconstruction of the structures and trajectory of the drill. Results Range of the distance of the trajectory to the facial nerve: 0.58 to 1.71mm. to the ossicular chain: 0.38 to 1.49 mm; to the tympanic membrane: 0.85 to 1.96 mm; total range of the distance of the trajectory: 5.92 to 12.65 mm. Conclusion The measurements of the relationship between the drill and the anatomical structures of the middle ear and the simulation of the trajectory showed that the middle ear cavity at 32 weeks was big enough for surgical procedures such as cochlear implants. Although cochlear implantation at birth is not an indication yet, this study shows that the technique may be an option in the future.

Estudios experimentales 1 Parte: el ensayo clínico / Experimental studies 1st Part: clinical trial

Los estudios experimentales, se caracterizan por la valoración del efecto de una o más intervenciones, habitualmente de forma comparativa con otra intervención, o un placebo; y el carácter prospectivo, de la recolección de los datos y el seguimiento de los grupos en estudio. Bajo la denominación de estudios experimentales, existe una diversidad de diseños, desde los ensayos clínicos (EC) y sus variantes, hasta los estudios cuasi-experimentales y los experientos naturales. El objetivo de este manuscrito, es reportar los principios básicos, características y estructura de un EC.

Experimental studies are characterized by the assessment of effect of one or more interventions, usually comparatively with other intervention, or placebo; and the prospective nature of data collection and follow-up. Included in the term experimental studies, there are a variety of designs: Clinical trials (CT) and its variants, quasi-experimental studies and natural experiments. The aim of this manuscript is to report basic principles, characteristics and CT structure.

Estudios experimentales 2 parte: estudios cuasi-experimentales / Experimental studies 2nd part: quasi-experimental studies

Los estudios experimentales, se caracterizan por la valoración del efecto de una o más intervenciones, habitualmente de forma comparativa con otra intervención, o un placebo; y el carácter prospectivo, de la recolección de datos y seguimiento. Agrupados bajo esta denominación, existe una diversidad de diseños, entre los que se encuentran los estudios cuasi-experimentales (ECE), que se caracterizan especialmente por la ausencia de asignación aleatoria. El objetivo de este manuscrito, es reportar los principios básicos, tipos, características y estrategias para la conducción de ECE.

Experimental studies are characterized by assessing the effect of one or more interventions, usually comparatively with other intervention, or placebo; and the prospective nature of data collection and follow-up. Clustered under this denomination, a variety of designs, among which are the quasi-experimental studies (QES), which are characterized particularly by the absence of randomization. The aim of this manuscript is to report the basic principles, types, characteristics and strategies for conducting QES.

Preliminary establishment of the standardized Chinese Infant Facial Expression of Emotion / 中国心理卫生杂志

Objective:The human parental brain is a discrete set of interacting brain circuits that related with child-care feelings and behaviors.The research on it can help us to understand the essence of human parent-child re-lationship formation.In order to provide materials for the research of human parental brain and related fields,the study is ready to establish a set of standardized Chinese Infant Affective Face Picture System.Methods:By using convenience sampling,a total of 360 infant facial expression pictures of 211 Chinese infants aged from 3 to 6 months were collected.After standard processing on the photos,196 unmarried and nulliparous college students re-cruited from two universities in Chongqing and Guiyang were asked to assess them.One hundred subjects assessed the emotion categories and intensity of the pictures,and other 96 subjects assessed the emotion valence,arousal and dominance of the selected pictures.Results:The Chinese Infant Affective Face Picture System,containing 117 hap-py,92 neutral,108 sad expression pictures,was established.At the same time,the corresponding average identifica-tion rate were 89%,77%,92%,the intensity were 5.83,5.15,and 6.19,the valence were 5.92,4.55 and 2.70,the arousal were 5.11,4.18,3.77,and the dominance were 5.02,4.93,and 4.91.The system could effectively stimu-late participants'emotional reactions.There were statistically significant differences in scores of the established va-lence,arousal and dominance index between the 3 kinds of expression pictures (Ps <0.01).Conclusion:The Chi-nese Infant Affective Face Picture System has higher reliability and validity.The system could be used as emotional stimulus materials for the study of parental brain or emotion researches.

Statistical approaches for analyzing a continuous outcome in experimental studies / Métodos estadísticos para análizar un resultado continuo en estudios experimentales

In experimental studies the outcome variable is measured at initial time, usually called "baseline", and then in several times called "follow-up" measurement(s). The study question of interest in an experimental study is whether there is a significant difference effect between treatment and comparison group, after intervention. In addition, one wants to estimate the difference effect between groups. This paper studies some of the strategies, including a simulation process, that one can be used for analyzing data coming from an experimental study as above, and considers using or not using the baseline measurements. Three parametric and two non-parametric strategies are evaluated considering only one follow-up measurement. The baseline measurement is incorporated in context in these strategies.

En estudios experimentales, la variable resultado se mide en el momento inicial y luego en diversas ocasiones. De este modo, se habla de mediciones de "línea de base" y seguimiento respectivamente. Lo interesante de esta materia es poder determinar si una vez aplicada una intervención, existen diferencias significativas entre el grupo al que se asignó un tratamiento de prueba y el grupo de comparación. En este manuscrito se exponen algunas de las estrategias utilizadas para tal propósito; las que incluyen un proceso de simulación mediante datos obtenidos a partir de un estudio experimental. Tres estrategias paramétricas y dos no paramétricas se evalúan teniendo en cuenta sólo una medida de seguimiento. La medida de referencia se incorpora en el contexto de estas estrategias.

Uma revisão sistemática de estudos experimentais sobre treinamento de habilidades sociais / A systematic review of experimental studies in social skills training

O presente trabalho buscou caracterizar os estudos experimentais publicados em periódicos nacionais na área do Treinamento de Habilidades Sociais e identificar tendências metodológicas e possíveis lacunas nas pesquisas encontradas. Foram recuperados, na íntegra, os 10 estudos experimentais citados no trabalho de Bolsoni-Silva el al.. (2006) e foi realizada uma busca no banco de dados SCIELO, compreendendo o período entre 2004 e 2012. A maioria das pesquisas localizadas foi realizada com sujeitos com características clínicas, tendo como objetivo a avaliação de diferentes componentes das habilidades socais por meio da observação sistemática do comportamento. Os estudos apresentam contribuições em termos da caracterização do repertório de habilidades sociais e da competência social de pacientes psiquiátricos psicóticos e da verificação da efetividade de programa de intervenção com estudantes universitários.

This paper characterized the experimental studies published in Brazilian journals in the field of Social Skills Training and identified trends and possible methodological gaps. The 10 experimental studies cited in the study of Bolsoni-Silva et al. (2006) were recovered and a search in the database SCIELO, including the period between 2004 and 2012, was conducted. Studies were carried out with individuals with clinical characteristics, aiming to assess several components of social skills through systematic observation of behavior. The researches have brought contributions to the characterization of the social skills repertoire and social competence of psychotics as well to the verification of the effectiveness of intervention program with university students.

Evaluation of Optimal Combination of Commercially Available Superparamagnetic Iron Oxide Nanoparticles and Transfection Agents for Labelling of Human Mesenchymal Stem Cells

PURPOSE: To determine the optimal combination of commercially available superparamagnetic iron oxide (SPIO) nanoparticles with transfection agents (TA). MATERIALS AND METHODS: Protamine sulfate (Pro) and poly-L-lysin (PLL) were incubated with ferumoxide and ferucarbotran in human mesenchymal stem cells at various concentrations, and cellular viability were evaluated. Cellular iron uptake was qualitatively and quantitatively evaluated. Cell visibility was assessed via MR imaging and the T2-relaxation time was calculated. RESULTS: The cellular viabilities with ferucarbotran were more significantly decreased than those with ferumoxide (p < 0.05). Iron uptake with ferumoxide was significantly higher than that for those with with ferucarbotran. The T2-relaxation time was observed to be shorter with ferumoxide in comparison to those with ferucarbotran (p < 0.05). Ferumoxide at a concentration of 25 microg/ml in combination with either Pro or PLL at a concentration of 3.0 microg/ml did not adversely impact cell viability, maximized iron uptake, and exhibited a lower T2-relaxation time in comparison to other combinations. CONCLUSION: Stem cells with ferumoxide exhibited a higher cellular viability and iron uptake in comparison to ferucarbotran- treated stem cells. A 25 microg/ml of ferumoxide with a 3.0 microg/ml of TA is sufficient to label mesenchymal stem cells.

Evaluation of two morphometric methods of bone loss percentages caused by periodontitis in rats in different locations

ABSTRACT OBJECTIVE: The present study evaluated morphometrically bone loss percentages in experimental periodontitis in rats, comparing different locations (lingual mandible, palatal maxilla and buccal maxilla) and two evaluation methods (distance and area methods). MATERIAL AND METHODS: Ligatures were placed around the maxillary right second molar and around the mandibular right first molar in 14 female Wistar rats. The contralateral molars served as intragroup controls. After 4 weeks, the rats were sacrificed and their mandible and maxilla were removed. The specimens were dissected and stained with methylene blue dye. Bone loss was evaluated by two different methods on the surfaces of the defleshed jaw. In the first method, the distance from the cementoenamel junction (CEJ) to the alveolar bone crest was measured in the roots of teeth associated with ligature. In the second method, the area of bone loss was determined using the alveolar tissue bone, CEJ and the proximal region of roots associated with the ligature as reference. The data were converted to bone loss percentages caused by ligature: (ligated - unligated) x 100/ligated. RESULTS: When comparing the distance and area methods, no statistically significant difference was observed (p>0.05). Both methodologies indicated that the maxilla presented greater bone loss than the mandible and it was more accentuated on the buccal side than on the palatal side (p<0.05). CONCLUSIONS: The findings of this study show that both the area and the distance methods can be used to evaluate bone loss caused by ligature placement in rats, and suggest applying the morphometric methodology to the maxilla on the buccal side.

Una revisión de la literatura sobre la relación causal entre los factores oclusales (FO) y los desordenes temporomandibulares (DTM) IV: estudios experimentales del ajuste oclusal por tallado selectivo como intervención preventiva ó terapéutica / A review of the literature on the causal relationship between occlusal factors (OF) and temporal mandibular disorders (TMD) IV: An experimental study of occlusal adjustment by selective grinding as a preventive or therapeutical intervention

Introducción: este es el cuarto de una serie de artículos que tienen como propósito presentar una revisión de laliteratura sobre la relación causal entre los factores oclusales (FO) y los desórdenes temporomandibulares (DTM). Métodos: en este artículo se presentaron y analizaron los estudios experimentales en los que se usó el ajuste oclusal (AO) como medioterapéutico para DTM y otros desórdenes asociados. Para el análisis se usaron los parámetros recomendados por Mohl. Resultados y conclusiones: el análisis de los estudios presentados en esta revisión de la literatura muestra que la evidencia actual no soportaal uso del AO como medio terapéutico de primera línea. Esto es en especial cierto cuando se considera el hecho de que es un tratamiento irreversible, con efectos secundarios (sensibilidad dental) y que es limitado a ciertos esquemas oclusales.

Introduction: this is the fourth of this series of articles that have as purpose to present a literature review about thecausal relationship between the occlusal factors (OF) and temporomandibular disorders (TMD). Methods: in this article, it was presented and analyzed experimental studies in which researchers used occlusal adjustment (OA) as a therapeutic means for TMDand other associated disorders. Results and conclusions: the analysis of the studies presented in this literature review shows that the actual evidence does not support the use of OA as a primary therapeutic method. This especially true when one considers thefact that it is an irreversible treatment, with secondary effects (tooth sensitivity) and that is limited to certain occlusal schemes.

Efeitos da oxigenioterapia hiperbárica no tratamento da lesão medular traumática: revisão sistemática / Efectos de la terapia hiperbárica en el traumatismo raquimedular: revisión sistemática / Effects of hyperbaric oxygen therapy after spinal cord injury: systematic review

OBJECTIVE: to conduct a systematic review of experimental and clinical studies evaluating the effect of hyperbaric oxygen therapy on the spinal cord injury. METHODS: ninety-three studies were identified in the database Pubmed. Among these, through a set of inclusion/exclusion criteria, 11 articles published between 1963 and 2009 were selected. In the nine experimental studies, different ways to apply the treatment were observed. The measured outcomes were: functional, histological, biochemical and electrophysiological. RESULTS: in most of the studies, the results show recovery of locomotor function, histology and/or biochemical features. Regarding the two studies in clinical samples, the results are controversial. The samples are heterogeneous and the application of hyperbaric oxygen therapy is not the same for all patients in each study. CONCLUSION: considering the results of this review, further studies are necessary to define the role of hyperbaric oxygen therapy in acute spinal cord injury.

OBJETIVO: realizar uma revisão sistemática dos estudos experimentais e clínicos relacionados com a utilização da oxigenioterapia hiperbárica no traumatismo raquimedular. MÉTODOS: noventa e três estudos foram identificados no Pubmed, sendo selecionados 11 artigos para análise, 9 experimentais e 2 clínicos, publicados entre 1963 e 2009. Os estudos experimentais apresentaram diferentes formas de tratamento, sendo o desfecho final mensurado pelas diferentes avaliações: funcional, histológica, bioquímica e eletrofisiológica. RESULTADOS: na maioria dos estudos foi observada uma recuperação da função locomotora, histológica e/ou bioquímica. Entretanto, os resultados dos estudos clínicos se mostraram controversos, pelo fato de as amostras serem heterogêneas e a administração da oxigenioterapia hiperbárica ser diferente quanto à dose e o tempo de aplicação. CONCLUSÃO: considerando os resultados desta revisão, será necessária a realização de mais estudos para se ter uma definição sobre a eficácia da oxigenioterapia hiperbárica na lesão medular aguda.

OBJETIVO: realizar una revisión sistemática de estudios experimentales y clínicos que evaluaban los efectos de la terapia hiperbárica en el traumatismo raquimedular. MÉTODOS: se identificaron noventa y tres estudios en el Pubmed. De estos, por un conjunto de criterios de inclusión y exclusión, se seleccionaron 11 artículos publicados entre 1963 y 2009. Entre los nueve estudios experimentales, se observaron diferentes formas de aplicación del tratamiento. Los resultados mensurados fueron: funcional, histológico, bioquímico y electrofisiológico. RESULTADOS: los resultados muestran, en la mayoría de los estudios, recuperación de la función locomotora, histología y/o características bioquímicas. Tratándose de los estudios clínicos, los resultados son controvertidos. Las muestras son heterogéneas y la aplicación de la terapia hiperbárica no es igual para todos los pacientes en cada estudio. CONCLUSIÓN: considerando los resultados de esta revisión, se hacen necesarios más estudios para definir el papel de la terapia hiperbárica en la lesión medular aguda.

Extract from leaf of Psidium guajava L depresses the guinea pig atrial contractility by interfering with potassium and calcium channels / Extrato de folha de Psidium guajava L deprime a contratilidade atrial de cobaia, interferindo com os canais de potássio e cálcio

The negative inotropic effect of aqueous fraction (AqF) obtained from the acetic extract of Psidium guajava L leaf was investigated on the guinea pig left atrium. Myocardial force was measured isometrically (27 ± 0.1 ºC, 2 Hz). AqF (100 μg/ml) reduced contractility of about 85 ± 9.4 percent (n = 4, p < 0.001, Fcalc = 51.70, F(0.01; 4; 21) = 5.09, EC50 = 14.28 ± 3 μg/mL) in a concentration-dependent fashion. This effect was reduced by 20 mM of tetraethylammonium (TEA), increasing EC50 to 50 ± 7 μg/ml (n = 4, p < 0.001, Fcalc = 282.13; F(0.01; 21; 66) = 2.36). AqF (100 μg/ml) shifted to the right the CaCl2 concentration-effect curve, increasing the EC50 from 2170 ± 112 to 2690 ± 132 μM (n = 3, p < 0.001, Fcalc = 220.80 ; F(0.01; 29; 60) = 2.19). L-NAME (100 μM) did not modify the AqF inotropic effect (n = 3, p > 0.05) sugesting that the oxide nitric pathway did not participate of the action mechanism of AqF. We can conclude that AqF depresses the atrial contractile by reducing the calcium entry in myocardial cells and also by openenig potassium channels of cardiac tissue.

O efeito inotrópico da fração aquosa (AqF) do extrato acético das folhas de Psidium guajava L. foi investigado em átrio esquerdo de cobaia. A força miocárdica foi medida isometricamente (27 ± 0,1 ºC; 2 Hz). A AqF (100 μg/mL) reduziu a contratilidade em até 85 ± 9,4 por cento (n = 4; p < 0,001; Fcalc = 51,70; F(0,01; 4; 21) = 5,09; CE50 = 14,28 ± 3 μg/mL) de forma dependente da concentração. Este efeito foi reduzido pelo tetraetilamônio (TEA, 20 mM) que também aumentou a CE50 de 14,28 ± 3 μg/mL para 50 ± 7 μg/mL (n = 4; p < 0,001; Fcalc = 282,13; F(0,01; 21; 66) = 2,36). A AqF (100 μg/mL) deslocou para a direita a curva concentração-efeito do CaCl2, aumentando a CE50 de 2170 ± 112 para 2690 ± 132 μM (n = 3; p < 0,001; Fcalc = 220,80 ; F(0,01; 29; 60) = 2,19). Por outro lado, o L-NAME (100 μM) não alterou o efeito inotrópico da AqF (n = 3; p > 0,05), sugerindo que a via do óxido nítrico não participa do mecanismo de ação da AqF. Conclui-se que a AqF deprime a contratilidade atrial por reduzir a entrada de cálcio nas células miocárdicas e por abrir canais de potássio deste tecido.

Influência da desnutrição promovida pela dieta básica regional sobre o perfil de ácidos graxos do leite materno, o crescimento e o desenvolvimento de ratos jovens / Malnutrition promoted by a basic regional diet alters the fatty acid profile of breast milk, and the growth and development of rat pups

OBJETIVO: Avaliar os efeitos do consumo da Dieta Básica Regional e da reabilitação nutricional, durante os períodos críticos de crescimento e desenvolvimento de ratos, sobre a evolução da sua massa corporal e tecidual, bem como o consumo alimentar de mães durante a gestação e lactação e de seus filhotes, machos e fêmeas, até 70 dias de vida. Adicionalmente, verificou-se o percentual dos ácidos graxos nas dietas experimentais e no leite materno. MÉTODOS: Foram utilizados ratos Wistar, de ambos os sexos. Após a constatação da prenhez, as ratas foram divididas em três grupos. 1) Grupo controle, animais alimentados com ração comercial durante o período de gestação e lactação (mães e filhotes) e, após o desmame, os filhotes até 70 dias de vida; 2) Grupo desnutrido, animais alimentados com ração Dieta Básica Regional durante o mesmo período descrito para o grupo controle e 3) Grupo recuperado, animais alimentados com ração Dieta Básica Regional durante o período de gestação e lactação e os filhotes, após o desmame, alimentados com ração comercial até 70 dias de vida. Os animais foram monitorados diariamente, aferindo-se a massa corporal e o consumo alimentar. Os filhotes com 70 dias de vida foram sacrificados por decapitação e o cérebro, o coração, o fígado e os rins foram retirados e pesados. Os animais receberam água e ração ad libitum e foram mantidos em biotério com temperatura e luminosidade controladas. Os testes estatísticos utilizados foram o teste t de Student, a Análise de Variância e o pós-teste de Bonferroni. RESULTADOS: Foram encontradas alterações importantes no percentual de ácidos graxos essenciais na Dieta Básica Regional, assim como no leite materno das mães desnutridas. O ganho de peso das mães desnutridas e de seus respectivos filhotes, tanto machos quanto fêmeas, foi menor que o de animais controle desde a lactação até o final do experimento. As fêmeas recuperadas apresentaram valores de massa corporal estatisticamente ...

OBJECTIVE: The aim of this study was to assess the effects of a basic regional diet and nutritional rehabilitation during the critical growth and development periods of rat pups and their effects on body weight and tissue mass gain; to assess food intakes of dams during gestation and lactation and of male and female pups until they were 70 days old; and to assess the percentages of fatty acids in experimental diets and breast milk. METHODS: Male and female Wistar rats were used. After mating, pregnant rats were divided into three groups: 1) Control group, consisting of dams from the beginning of pregnancy (21 days) and pups from birth until they were 70 days old (totaling 91 days) fed commercial lab chow; 2) Malnourished group, consisting of dams and pups fed the regional basic diet chow for the same 91 days; and 3) rehabilitated group, consisting of dams fed the regional basic diet during pregnancy and lactation and pups fed commercial lab chow after weaning (at 21 days) until they were 70 days old. The animals received food and water ad libitum and were maintained in a room with controlled temperature and lighting conditions. The animals were monitored daily to record body weight and food intake. At 70 days, the offspring were killed by decapitation and the brain, heart, kidneys and liver were removed and weighed. The results were analyzed using the Student's t-test, analysis of variance and Bonferroni post hoc test. RESULTS: Important changes were observed in the percentages of essential fatty acids in the regional basic diet as well as in the milk of malnourished dams. Weight gains of malnourished dams and male and female offspring were lower than those of the controls´ from the lactation period until the end of experiment. No differences in body weight were found between the females of the rehabilitated and control groups, but the weight of the male offspring of both groups differed. CONCLUSION: The impaired body weight gain of the ...

Efeito da suplementação com ácido linoléico conjugado e do treinamento em natação sobre a composição corporal e os parâmetros bioquímicos de ratos Wistar em crescimento / Effect of conjugated linoleic acid supplementation and swimming training on the body composition and biochemical parameters of Wistar pups

OBJETIVO: Avaliar os efeitos da suplementação com ácido linoléico conjugado, associada ao treinamento moderado em natação, sobre a composição corporal, o consumo e a eficiência alimentar, a glicemia, o perfil lipídico e o glicogênio muscular e hepático de ratos Wistar. MÉTODOS: Ratos Wistar (30 dias) foram divididos em: sedentário, sedentário suplementado, treinado e treinado suplementado. Permaneceram em gaiolas individuais com comida e água ad libitum, temperatura de 23ºC (com variação de1ºC) e ciclo claro-escuro de 12 horas, durante 8 semanas. A sessão de natação durou 1 hora e foi realizada três vezes/semana, bem como a suplementação com ácido linoléico conjugado a 2 por cento. Após sacrifício, o plasma, os tecidos adiposos brancos e o marrom, o músculo gastrocnêmio e o fígado foram coletados e pesados. RESULTADOS: A suplementação per se não promoveu modificação na ingestão alimentar e na massa corporal dos animais. Houve aumento na glicemia de jejum (p<0,05), nas lipoproteínas de alta densidade (p<0,05), no colesterol total (p<0,05) e redução dos triacilgliceróis. A suplementação associada ao treinamento reduziu a massa corporal (p<0,05) e aumentou o peso relativo do tecido adiposo, do fígado e a glicemia de jejum. CONCLUSÃO: A suplementação com ácido linoléico conjugado associada à prática de exercício físico parece ter influência no balanço energético, mas, por outro lado, o aumento no peso do fígado indica que a ingestão deste ácido graxo pode ter efeitos indesejáveis, aumentando as chances de desenvolvimento do fígado gorduroso. Estes achados apontam perspectivas para novos estudos envolvendo análises histológicas do fígado, expressão gênica de enzimas chaves do metabolismo lipídico e de carboidratos, associados ou não a diferentes protocolos de treinamento físico.

OBJECTIVE: The objective of this study was to evaluate the effects of conjugated linoleic acid supplementation associated with moderate swimming training on body composition, food efficiency and consumption, blood glucose, lipid profile, and muscle and liver glycogen of Wistar rats. METHODS: Thirty-day old Wistar rats were divided into the following groups: inactive, inactive with 2 percent conjugated linoleic acid supplementation, active, and active with 2 percent conjugated linoleic acid supplementation. They remained in individual cages with food and water ad libitum, temperature of 23±1ºC and a light and dark cycle of 12 hours for 8 weeks. The active groups swam for one hour three times per week. The animals were killed and the plasma, white and brown fat tissues, gastrocnemius muscle and liver were collected and weighted. RESULTS: Supplementation per se did not promote food intake or body weight changes in the animals. Fasting glucose (p<0.05) and high density lipoproteins (HDL, p<0.05) increased and triacylglycerols decreased. Supplementation associated with activity decreased body mass (p<0.05) and increased the relative weight of fat tissues, liver and fasting glucose. CONCLUSION: Conjugated linoleic acid supplementation associated with physical activity seems to influence energy balance. On the other hand, the increased liver weight indicates that intake of this fatty acid may have undesirable side-effects, increasing the chances of developing fatty liver. This new perspective makes way for new studies including histological analyses of the liver and gene expression of key enzymes from the lipid and carbohydrate metabolism, associated or not with different physical training protocols.

Studying the central control of food intake and obesity in rats

The central nervous system regulates energy intake and expenditure through a complex network of neurotransmitters and neuromodulators. It is of great interest to understand the relevance of these systems to the physiological control of energy balance and to the disturbances of obesity. The present paper discusses some of the methods to address this field used at the laboratory of Endocrine Physiology of Universidade Federal de São Paulo. Initially, different experimental models of rat obesity are presented, namely the hypothalamic induced monosodium glutamate model, the Zucker genetic model, and the dietary model. The principles of brain microdialysis are also presented, the technique applied to obtain representative samples of the extracellular fluid of brain sites involved in feeding control. The microdialysate levels of serotonin, an important anorexigenic neurotransmitter, are determined by HPLC with electrochemical detection. The immunoblot technique (Western blot) is used to determine hypothalamic levels of proteins relevant to the anorexigenic effect of serotonin and to analyze the acute activation of the insulin signaling cascade in the hypothalamus. The final section addresses the potential applications of proteomics in the study of the central control of feeding.

O sistema nervoso central controla a ingestão e o gasto de energia por meio de um complexo circuito de neurotransmissores e neuromoduladores. É de grande interesse entender a relevância fisiológica destes sistemas e o papel que desempenham nos distúrbios da obesidade. No presente artigo, discutem-se alguns dos métodos que têm sido utilizados no laboratório de Fisiologia Endócrina da Universidade Federal de São Paulo, em estudos neste campo. Inicialmente, são apresentados alguns modelos de obesidade experimental em ratos, como a obesidade hipotalâmica induzida por glutamato monossódico, o modelo genético Zucker e também obesidades induzidas por dieta. Comenta-se, em seguida, sobre os princípios da microdiálise cerebral. Esta técnica é utilizada para obter amostras representativas do líquido extracelular de regiões cerebrais envolvidas no controle da ingestão alimentar. Os níveis de serotonina, um importante neurotransmissor anorexígeno, são medidos no dialisato por cromatografia líquida de alta pressão com detecção eletroquímica. Utiliza-se a técnica de immunoblot (Western blot) para determinar os níveis hipotalâmicos de proteínas importantes na ação anorexigênica da serotonina e também para analisar a ativação aguda da cascata de sinalização da insulina no hipotálamo. A seção final aborda o grande potencial da análise proteômica no estudo do controle central da ingestão.