Low concentrations of grape seed extract maintain osteoblast morphology, cell adhesion, and mineralization

Abstract The increase in life expectancy has led to a higher incidence of osteoporosis, characterized by an imbalance in bone remodeling. Several drugs are used for its treatment, but most promote undesirable side effects. The present investigation evaluated the effects of two low concentrations of grape seed extract (GSE) rich in proanthocyanidins on MC3T3-E1 osteoblastic cells. The cells were cultured in an osteogenic medium and divided into control (C), 0.1 µg/mL GSE (GSE0.1), and 1.0 µg/mL GSE (GSE1.0) groups to evaluate cell morphology, adhesion, and proliferation, in situ alkaline phosphatase (ALP) detection, mineralization and immunolocalization of osteopontin (OPN). The data obtained were analyzed by statistical tests for a significance of 5%. Cell morphology was maintained with both GSE concentrations, whereas cell adhesion significantly increased within three days in all groups. Cell proliferation increased significantly at seven days of culture, followed by a significant decrease in all experimental periods, with no statistical difference among them. In situ detection of ALP and mineralization increased with time, but within each period, no statistical differences among groups were observed. The expression of osteopontin was distributed regularly with more intensity after 24 hours in the GSE0.1 group. After three days, OPN expression was more intense in the control group, followed by GSE0.1 and GSE1.0 groups. Data obtained suggest that low concentrations of GSE do not affect the morphology and may stimulate the functional activity of osteoblastic cells.

Resumo O aumento da expectativa de vida tem levado a uma maior incidência de osteoporose, caracterizada por um desequilíbrio na remodelação óssea. Vários medicamentos são utilizados para o seu tratamento, contudo, a maioria promove efeitos colaterais indesejáveis. A presente investigação avaliou os efeitos de duas baixas concentrações de extrato de semente de uva (GSE) rico em proantocianidinas em células osteoblásticas MC3T3-E1. As células foram cultivadas em meio osteogênico e divididas em grupos controle (C), 0,1 µg/mL de GSE (GSE0.1) e 1,0 µg/mL de GSE (GSE1.0) para avaliar morfologia, adesão e proliferação celular, detecção in situ de fosfatase alcalina (ALP), mineralização e imunolocalização da proteína osteopontina (OPN). Os dados obtidos foram analisados por testes estatísticos para um nível de significância de 5%. A proliferação celular aumentou significativamente aos sete dias de cultura, seguido de uma diminuição significativa em todos os períodos experimentais, sem diferença estatística entre eles. A detecção in situ de ALP e mineralização aumentou com o tempo, mas dentro de cada período não foram observadas diferenças estatísticas entre os grupos. A morfologia celular foi mantida com ambas as concentrações de GSE, enquanto a adesão celular aumentou significativamente aos três dias em todos os grupos. A expressão de osteopontina distribuiu-se regularmente com maior intensidade após 24 horas no grupo GSE0.1. Após três dias, a expressão de OPN foi mais intensa no grupo controle, seguida pelos grupos GSE0.1 e GSE1.0. Os dados obtidos sugerem que baixas concentrações de GSE não afetam a morfologia e podem estimular a atividade funcional das células osteoblásticas.

Ejecución de una intervención educativa alimentaria en escolares, antes y durante el confinamiento por COVID-19 / Implementaton of an Educational Food Intervention in Schoolchildren, Before and During COVID-19 Confinement

Resumen Antecedentes: la pandemia y el confinamiento por COVID-19 modificaron las condiciones de vida de los escolares y sus familias. Objetivo: describir la ejecución de una intervención educativa alimentaria en escolares de la Institución Educativa Monseñor Gerardo Valencia Cano, Medellín, Colombia, antes y durante el confinamiento por COVID-19. Materiales y métodos: investigación cualitativa con apoyo de variables cuantitativas. La recolección y análisis de datos se hicieron con base en la teoría fundamentada. La población estuvo conformada por escolares y padres de familia de la Institución Educativa Monseñor Gerardo Valencia Cano. Antes de la COVID-19 se realizaron cuatro grupos focales y una encuesta semiestructurada a 416 estudiantes y sus padres de familia, y con 42 docentes se realizaron cuatro grupos focales más; estos se realizaron hasta alcanzar la saturación. Durante el confinamiento se aplicaron 237 encuestas a familias (escolares y padres). Se evaluó el estado nutricional. Resultados: el 37 % de los escolares entre tercero y séptimo grado tenía exceso de peso. Se logró identificar de manera participativa los factores de riesgo y protectores frente al exceso de peso, para definir una intervención educativa alimentaria desde y con los sujetos. Los nodos conceptuales de la intervención fueron alimentación saludable, métodos de cocción, preparación de alimentos saludables y alimentación para la prevención del exceso de peso y cáncer de colon. Conclusiones: el reconocimiento de las condiciones alimentarias antes y después del confinamiento de los escolares y sus familias, o del cambio de estas a lo largo de la intervención educativa, contribuyó a lograr coherencia entre las necesidades, objetivos educativos y metodologías implementadas. El hecho de tener reunidos en un mismo espacio (hogar) a los escolares y sus padres durante el confinamiento propició un microentorno favorecedor de conductas que motivaron una mejora de los hábitos alimentarios familiares.

Abstract: Background: The pandemic and COVID-19 confinement changed the living conditions of schoolchildren and their families. Objective: To describe the implementation of an educational food intervention in schoolchildren at the Monseñor Gerardo Valencia Cano Educational Institution, Medellín, Colombia, before and during the COVID-19confinement. Materials and Methods: Qualitative research supported by quantitative variables. Data collection and analysis were based on grounded theory. The population consisted of schoolchildren and parents of the Monseñor Gerardo Valencia Cano Educational Institution. Before COVID-19, four focus groups and a semi-structured survey were conducted with 416 students and their parents, and four more focus groups were conducted with 42 teachers; these were carried out until saturation was reached. During the confinement, 237 surveys were administered to families (students and parents). Nutritional status was evaluated. Results: 37% of the students between third and seventh grade were overweight. It was possible to identify in a participatory way the risk and protective factors against excess weight, in order to define an educational food intervention from and with the subjects. The conceptual nodes of the intervention were healthy eating, cooking methods, preparation of healthy food, and food for the prevention of excess weight and colon cancer. Conclusions: The recognition of the nutritional conditions before and after the confinement of the schoolchildren and their families, or the change of these throughout the educational intervention, helped to achieve coherence between the needs, educational objectives, and methodologies implemented. The fact of having schoolchildren and their parents gathered in the same space (home) during confinement generated a microenvironment that favored behaviors that triggered an improvement in family eating habits.

Sistematización de Experiencias: una reflexión sobre sus potencialidades para la salud pública

Objetivo: Presentar los resultados de una revisión sobre la investigación y metodología de Sistematización de Experiencias y su pertinencia en la salud pública. Métodos: Se realizó una revisión de literatura en dos etapas usando los siguientes operadores booleanos: "sistematización de experiencias" AND "metodología" OR "investigación" OR "salud" OR "educación popular" OR "trabajo social" OR "Latinoamérica" OR "Investigación Acción Participativa", en las bases de datos MedLine y Scielo, complementada con la búsqueda en el catálogo general de las bibliotecas de la Pontificia Universidad Javeriana y la Universidad Nacional de Colombia. Se dejó fecha e idioma abierto. Se empleó N-Vivo versión 12 para el procesamiento de la información. Resultados: Se obtuvieron 183 referencias, entre artículos, libros, literatura gris, tesis (pregrado, maestría o doctorado) y material audiovisual. De estos, se seleccionaron 88 para revisión de texto completo. Se generaron seis categorías relacionadas con la definición, metodología, instrumentos, objetivos, limites-tensiones y ventajas de la Sistematización de Experiencias. Conclusiones: La Sistematización de Experiencias es una metodología cualitativa surgida en el contexto latinoamericano que permite la reconstrucción de la historia y el conocimiento de las prácticas para fortalecer y transformar la realidad local. En el campo de la salud pública, la SE permite reinterpretar las nociones y problemáticas en salud de las personas y colectividades; comprender sus experiencias, necesidades y expectativas en salud; e identificar la agencia de las personas para mejorar e incidir en el bienestar y la calidad de vida de sus comunidades.

Objective: To show the results of a literature review about the investigation and methodology of Systematization of Experiences and its relevance in public health. Method: A literature review was carried out in two stages. The following Boolean operators were used: "systematization of experiences" AND "methodology" OR "research" OR "health" OR "popular education" OR "social work" OR "Latin America" OR "Participatory Action Research", in the MedLine and Scielo databases, was complemented by a search in the general catalog of the libraries of the Pontificia Universidad Javeriana and the Universidad Nacional de Colombia. Date and language were left open. N-Vivo version 12 was used for the processing and description of the information. Results: A total of 183 references were obtained from articles, books, gray literature, thesis (undergraduate, master's or doctorate) and audiovisual material. Of these, 88 were selected for full text review. Six categories were created related to the definition, methodology, instruments, objectives, limits-tensions and advantages of the Systematization of experiences. Conclusions: The Systematization of Experiences is a methodological strategy that contributes to qualitative research created within the context of Latin America, which allows us to recover the history and knowledge of practices while also strengthening and transforming the local reality. In the field of public health, it allows us to reinterpreting the notions and problems of individuals and communities; understanding their experiences, needs and expectations in health; and identify people's agency to improve and positively influence the well-being and quality of life of the community.

Un acercamiento desde la ecología social a la lectura de territorio en la intervención del trabajo social / An approach from social ecology to the reading of territory in social work intervention

Este artículo de reflexión desarrolla la siguiente premisa: realizar lectura de territorio para llevar a cabo procesos de gestión ambiental y planificación territorial, como un resultado de la investigación realizada en el 2018, Prácticas y saberes de intervención del Trabajo Social en el escenario ambiental; desde la experiencia de los departamentos de Antioquia y Caldas. El presente artículo pretende entonces abordar el papel que asume el trabajador social en relación con la intervención en el escenario ambiental, partiendo del reconocimiento y la lectura del territorio, entendido este no solo como un espacio geográfico, sino también como un espacio donde convergen diferentes aristas, tales como los ámbitos sociales y culturales inmersos en la cotidianidad del hombre; con ello se espera generar reflexiones y movilizaciones frente al reconocimiento de derechos e incentivar la participación ciudadana. Teniendo en cuenta este panorama, y pensando desde la ecología social, es indispensable que el ser humano comprenda el vínculo que tiene con la naturaleza, no solo desde el enfoque natural, sino también desde el social y el cultural.

This reflection article develops the following premise: to perform territory reading to carry out processes of environmental management and territorial planning, as a result of the research conducted in 2018, Practices and knowledge of Social Work intervention in the environmental scenario; from the experience of the departments of Antioquia and Caldas. This article aims then to address the role assumed by the social worker in relation to the intervention in the environmental scenario, starting from the recognition and reading of the territory, understood not only as a geographical space, but also as a space where different edges converge, such as the social and cultural spheres immersed in the daily life of man; with this, it is expected to generate reflections and mobilizations in front of the recognition of rights and encourage citizen participation. Considering this panorama, and thinking from the perspective of social ecology, it is essential that human beings understand the link they have with nature, not only from the natural approach, but also from the social and cultural ones.

Osteoporosis affects functional activity and gene expression of osteoblastic cells derived from rat alveolar bone

Abstract Recent studies suggest that osteoporosis, in addition to the damage caused in long bones, may cause deterioration in the jaws, especially in alveolar bone sites, with effects in the progress of periodontal disease as well as in bone healing. The aim of this study was to evaluate the effect of osteoporosis in the metabolism of rat alveolar bone osteoblasts. There were used 10 female rats divided in two experimental groups (Sham and OVX), which were ovariectomized and after 8 weeks euthanized to collect mandibular bone samples in order to isolate osteoblastic cells. The cells were cultured in 24-well plates to perform the in vitro experiments. After 7, 10 and 14 days, there were evaluated cell proliferation by MTT assay, in situ detection of alkaline phosphatase (ALP) as well as mineralized nodules and expression of genes associated to bone remodeling. Results showed that at 7, 10 and 14 days cell proliferation was lower for OVX group. In situ detection of ALP was higher at 7 days and lower at 10 and 14 days in OVX group. At 17 and 21 days, OVX group had a significative decrease of mineralization nodules. There was a downregulation in the expression of Alp, Bglap and Runx2 genes and an upregulation of Opg in OVX group, whereas Opn and Rankl modulation was similar between the evaluated groups. Our results suggest that osteoporosis has a deleterious effect on alveolar bone cells from ovariectomized rats, which might affect the treatment of diseases associated to the jaw bones.

Resumo Estudos recentes sugerem que a osteoporose, além dos danos provocados em ossos longos, pode causar deterioração dos ossos maxilares, especialmente na região do osso alveolar, com efeitos na progressão da doença periodontal assim como no reparo ósseo. O objetivo deste estudo foi avaliar o efeito da osteoporose no metabolismo de osteoblastos do osso alveolar mandibular de ratos. Foram utilizadas 10 ratas fêmeas divididas em dois grupos experimentais (Sham e OVX), que foram ovariectomizadas e após 8 semanas, eutanasiadas para coletar amostras do osso mandibular e isolar as células osteoblásticas. As células foram cultivadas em placas de cultura de 24 poços para serem realizados os experimentos in vitro. Após 7, 10 e 14 dias foram avaliados a proliferação celular pelo ensaio de MTT, detecção in situ de fosfatase alcalina (ALP) assim como de nódulos mineralizados e expressão quantitativa de genes associados à remodelação óssea. Os resultados mostraram que aos 7, 10 e 14 dias a proliferação celular foi menor para o grupo OVX. A detecção in situ de ALP foi maior aos 7 dias e menor aos 10 e 14 dias no grupo OVX. Aos 17 e 21 dias o grupo OVX apresentou uma diminuição dos nódulos mineralizados. Houve uma repressão na expressão dos genes Alp, Bglap e Runx2 e uma indução do gene Opg no grupo OVX, enquanto que a modulação dos genes Opn e Rankl foi similar entre os grupos experimentais. Nossos resultados sugerem que a osteoporose tem um efeito deletério no metabolismo de células do osso alveolar em ratas ovariectomizadas, o que pode afetar o tratamento de doenças associadas aos ossos maxilares

Molecular markers for the diagnosis of high-risk human papillomavirus infection and triage of human papillomavirus-positive women

ABSTRACT Infection with high-risk human papillomavirus (HPV) increases the likelihood of developing cervical cancer (CC). A plethora of cellular processes is required to produce pre-malignant lesions, which in turn may become malignant if left untreated. Those changes are induced by viral oncoproteins, which represent an ideal target to identify the viral presence, or by some particularities of the host that ultimately promote the establishment of CC. This article describes the different methods used for HPV detection and quantification, as well as the current trend of secondary screening approaches to detect premalignant lesions and CC. In addition, we analyzed validated biomarkers and those under clinical investigation for the classification (triage) of women at risk of developing CC after an initial positive HPV test and that could be used as prognostic biomarkers for CC. The use of molecular biomarkers, together with the detection of HPV DNA sequences, provides a high impact diagnostic and prognostic tool in the detection of patients at increased risk of developing CC and also may guide their clinical management. In addition, some of those biomarkers could represent pharmacological targets for the future design of therapeutic approaches to CC treatment.

Colombia y Uruguay ante la COVID-19: datos epidemiológicos, medidas generales y en la práctica odontológica / Colombia and Uruguay in the face of COVID-19: epidemiological data, general and dental practice measures

Objetivo: analizar los datos epidemiológicos y las medidas generales en la práctica odontológica tomadas por Colombia y Uruguay durante la pandemia por la COVID-19. Métodos: este trabajo es una revisión de la literatura. Se consultaron las bases de datos "PubMed", "Scielo" y el motor de búsqueda "Google Scholar". También se consultaron bases de datos de libre acceso como google, our world in data y las páginas oficiales de la Organización Mundial de la Salud, el Ministerio de Salud de Colombia, el Instituto Nacional de Salud y el Ministerio de Salud Pública de Uruguay. Se realizó un análisis descriptivo del comportamiento epidemiológico y de las medidas tomadas en la práctica odontológica en los dos países. Resultados: en Colombia, a diario, se presentan más de 3.000 casos nuevos y más de 100 muertes. Lo contrario ocurre en Uruguay, que ha logrado disminuir las tasas de contagio y de muertes, presentando menos de 10 casos y ninguna muerte diaria. Los profesionales de la salud han incrementado su lucha; los odontólogos se encuentran expuestos por su proximidad al momento de la atención, en el contacto con saliva, sangre y la generación de aerosoles, por lo que han modificado los protocolos de bioseguridad buscando prevenir los contagios asociados a la prestación de servicio. Conclusiones: Uruguay ha tenido un comportamiento ejemplar ante la pandemia; en Colombia los resultados son preocupantes dado el crecimiento exponencial. En ambos países la práctica odontológica se ha visto afectada y se han implementado nuevos protocolos para proteger a profesionales y pacientes.

Objective: Analyze the epidemiological data, general and dental practice measures taken by Colombia and Uruguay in the face of the COVID-19 pandemic. Methods: This study is a review. We search in the databases "PubMed", "Scielo" and in the search engine "Google Scholar". Also, were consulted the free databases like google, our world in data and the official pages of the World Health Organization, Ministry of Health of Colombia, The National institute of health and the Ministry of public Health of Uruguay. A descriptive analysis of the epidemiological behavior and the measures taken of dental practice in both countries was done. Results: Colombia had more than 3,000 new cases and more than 100 deaths daily. The opposite occurs in Uruguay, which has managed to decrease the infection and death rates, presenting less than 10 cases and no daily deaths. The struggles experienced by health professionals has increased, dentists are exposed, by their proximity at the time of care, to contact with saliva, blood and the generation of aerosols, therefore, they have modified the biosafety protocols, seeking to prevent infections associated with the practice. Conclusions: Uruguay has an exemplary behavior; in Colombia these results are worrying with an exponential growth. In both countries, dental practice has been affected and new protocols have been implemented that seek to protect the professionals and patients.

Effect of grape seed extract (GSE) on functional activity and mineralization of OD-21 and MDPC-23 cell lines

Abstract Recent studies on functional tissue regeneration have focused on substances that favor cell proliferation and differentiation, including the bioactive phenolic compounds present in grape seed extract (GSE). The aim of this investigation was to evaluate the stimulatory potential of GSE in the functional activity of undifferentiated pulp cells and odontoblast-like cells. OD-21 and MDPC-23 cell lines were cultivated in odontogenic medium until subconfluence, seeded in 24-well culture plates in a concentration of 2x104/well and divided into: 1) OD-21 without GSE; 2) OD-21+10 µg/mL of GSE; 3) MDPC-23 without GSE; 4) MDPC-23+10 µg/mL of GSE. Cell proliferation, in situ detection of alkaline phosphatase (ALP) and total protein content were assessed after 3, 7 and 10 days, and mineralization was evaluated after 14 days. The data were analyzed by ANOVA statistical tests set at a 5% level of significance. Results revealed that cell proliferation increased after 10 days, and protein content, after 7 days of culture in MDPC-23 cells. In situ ALP staining intensity was higher in undifferentiated pulp cells and odontoblast-like cells after 7 and 10 days, respectively. A discrete increase in MDPC-23 mineralization after GSE treatment was observed despite OD-21 cells presenting a decrease in mineralized nodule deposits. Data suggest that GSE favors functional activity of differentiated cells more broadly than undifferentiated cells (OD-21). More studies with different concentrations of GSE must be conducted to confirm its benefits to cells regarding dentin regeneration.

Agreement, correlation, and kinetics of the alveolar bone-loss measurement methodologies in a ligature-induced periodontitis animal model

Abstract Periodontal research involves the use of animal models to better understand the biological processes of periodontal diseases and the potential of new or existing therapies. Currently, ligature-induced periodontitis in rats is the main model used in periodontal research, in this model, alveolar bone loss (ABL) is the main parameter evaluated by radiographic, morphometric, and histological techniques. Interestingly, although these methodologies are widely used, it is not totally clarified neither the kinetics of ABL over the induction time nor the agreement degree (repeatability and reproducibility) of these techniques. Objective: To characterize ABL kinetics at 0, 3, 7, 15, 30, and 60 days after ABL induction by ligature and to evaluate the intra- (repeatability) and inter-examiner (reproducibility) agreement and the correlation among the radiographic, morphometric, and histological methodologies. Material and Methods: 60 male Wistar rats with induced ABL were randomly divided into 6 experimental groups (n = 10 animals/group). After 0, 3, 7, 15, 30, and 60 days, the animals were euthanized and their hemimandibles were removed for ABL determination using radiographic, morphometric and histological techniques. Results: Radiographic and morphometric/linear techniques allowed the detection of statistically significant ABL on the third day, while histological and morphometric/area techniques could only detect ABL after the seventh day (ANOVA/Tukey, p<0.05). After the fifteenth day, except for histological analysis, the ABL was stabilized. Concerning the agreement of the methodologies, Bland Altman's test (intra and inter-examiner evaluations) showed no difference among the measurements (p>0.05). In addition, high correlations (Pearson's test, r2>0.9, p<0.05) were observed. Conclusion: The results indicated that the minimum time for ABL induction could vary from 3 to 7 days, according to the chosen analysis methodology. Agreement and correlation data support the comparison of results between studies with same induction time.

Cyclooxygenase biology in renal function - literature review / Biología de la ciclooxigenasa en la función renal - Revisión de la literatura

Abstract The cyclooxygenase (COX) exists in two main isoforms, COX-1 and COX-2, which are present in the renal system to ensure its homeostasis. However, in different clinical situations, these enzymes can play a physiologic role in maintaining the integrity of this organ, and also be associated with the worsening of tissue injuries/damage. In this sense, an explanation of the true biological function of the isoforms of COX enables a better understanding of the physiology and pathology of the kidney, as well as a better understanding of the consequences of its inhibition by the use of drugs. This review aimed to study the biological role of the COX enzyme in the renal system in different clinical situations.

Resumen La ciclooxigenasa existe en dos isoformas principales: COX-1 y COX-2, estas se encuentran presentes en el sistema renal como parte de su homeostasis. Sin embargo, en algunas situaciones clínicas, las dos enzimas pueden desempeñar un papel en el mantenimiento de la integridad de este órgano, y en otras pueden estar asociadas a la evolución de daños y lesiones en los tejidos. En este sentido, el conocimiento de la verdadera función biológica de las isoformas de la COX permite una mejor comprensión de la fisiología y patología del riñón, así como una mejor comprensión de las consecuencias de su inhibición por el uso de medicamentos. El objetivo de esta revisión es estudiar la función biológica de la enzima COX en el sistema renal en diferentes situaciones clínicas.

Gastric and renal effects of COX-2 selective and non-selective NSAIDs in rats receiving low-dose aspirin therapy

Abstract The consumption of low-dose aspirin (LDA) to prevent cardiovascular disease continues to increase worldwide. Consequently, the number of chronic LDA users seeking dental procedures that require complementary acute anti-inflammatory medication has also grown. Considering the lack of literature evaluating this interaction, we analyzed the gastric and renal effects caused by a selective COX-2 inhibitor (etoricoxib) and a non-selective COX-2 inhibitor (ibuprofen) nonsteroidal anti-inflammatory drug (NSAID) in rats receiving chronic LDA therapy. Male Wistar rats were divided into six experimental groups (carboxymethylcellulose (CMC) - vehicle; LDA; LDA + ibuprofen; ibuprofen; LDA + etoricoxib; and etoricoxib) and submitted to long-term LDA therapy with a subsequent NSAID administration for three days by gavage. After the experimental period, we analyzed gastric and renal tissues and quantified serum creatinine levels. The concomitant use of LDA with either NSAID induced the highest levels of gastric damage when compared to the CMC group (F = 20.26, p < 0.05). Treatment with either LDA or etoricoxib alone was not associated with gastric damage. No significant damage was observed on kidney morphology and function (F = 0.5418, p > 0.05). These results suggest that even the acute use of an NSAID (regardless of COX-2 selectivity) can induce gastric damage when combined with the long-term use of low-dose aspirin in an animal model. Additional studies, including clinical assessments, are thus needed to clarify this interaction, and clinicians should be careful of prescribing NSAIDs to patients using LDA.

Factor de riesgo suicida según dos cuestionarios, y factores asociados en estudiantes de la universidad nacional de Colombia sede Manizales / Suicide risk factors measured with two questionnaires, and associated factors among students of the universidad nacional de Colombia of Manizales

Objetivo: Determinar el factor de riesgo (FR) suicida según dos cuestionarios y factores asociados que presentan los estudiantes de la Universidad Nacional de Colombia, sede Manizales (Caldas, Colombia) en la jornada diurna. Materiales y métodos: La investigación fue de tipo corte transversal; la población estuvo constituida por 255 estudiantes de 3 facultades de la Universidad. Resultados: Prevalencia de riesgo suicida: 6,7 %, según Plutchik; 19,7 %, según Beck. Buena funcionalidad familiar: 39,8 %. Depresión ausente: 55,7 %. Se encontró una relación significativa entre el FR suicida, según Plutchik, y factores como el género, el gusto por el metal y la balada, la práctica de un deporte, hacer aeróbicos, la presencia de cuadros depresivos y la funcionalidad familiar. Según Beck, dichos factores son género musical metal, depresión y funcionalidad familiar. Conclusiones: La prevalencia de riesgo suicida en esta población es inferior a la encontrada en otros estudios en poblaciones similares.

Objective: to determine suicide risk and other related factors according to two surveys conducted at the Universidad Nacional de Colombia of Manizales (Caldas, Manizales). Materials and Methods: cross-sectional design with 255 students of 3 programs of the Universidad Nacional. Results: prevalence of suicide tendency according to Plutchik: 6,7 %; according to Beck: 19,7 %. Good family functioning: 39,8 %; absent depression: 55,7 %. A significant correlation was found between suicide risk factor (Plutchnik) and gender, metal musical, exercise, depression, and family functioning. According to Beck, these factors are metal musical gender, depression and family functioning. Conclusions: The prevalence of suicide risk in this population is below the average when compared to other research.

EVALUATION OF ELECTRICAL IMPEDANCE SPECTROSCOPY FOR CERVICAL INTRAEPITHELIAL LESIONS DETECTION / EVALUACIÓN DE LA ESPECTROSCOPIA DE IMPEDANCIA ELÉCTRICA PARA LA DETECCIÓN DE LESIONES INTRAEPITELIALES DEL CUELLO UTERINO

Objective: To evaluate the diagnostic accuracy of electrical impedance spectroscopy (EIS) in detection of pre-invasive cervical lesions. Design: Cross-sectional study of diagnostic validity carried out with 265 women between 15 and 55 years with abnormal pap smear report, referred to colposcopy, who were evaluated between January 2008 and June 2010 in the Cervical Pathology and Colposcopy Network in the Departments of Caldas and Risaralda (Colombia). Measurements of electrical impedance spectroscopy of the cervix were made, new pap smear samples were taken, colposcopic examination and colposcopically directed biopsies were performed. Results: The evaluated parameters were resistivity of the extracellular space (R), resistivity of the intracellular space (S), cell membrane capacitance (Cm) and characteristic frequency (Fc). The results obtained for R parameter were: in squamous normal tissue 21.27 +/- 16.48 (O-m); in high-grade lesions 4.28 +/- 2.28 (O-m); and in low-grade lesions 10.1 +/- 4.59 (O-m), showing a decrease of R in neoplastic tissue compared to normal tissue. The sensitivity of the EIS was 0.88 for high grade lesions and 0.71 for low grade lesions. The area under the ROC curves for high grade lesions /normal epithelium was 0.96, for low grade lesions/normal epithelium was 0.76 and for high grade/low grade was 0.90. Conclusions: This study established that EIS is a useful technique for detection and characterization of cervical intraepithelial lesions, with diagnostic precision greater than 75%, with sensitivity and specificity over 69%, with an acceptable positive predictive value and a negative predictive value close to 90%.

Objetivo: Evaluar la precisión diagnóstica de la espectroscopia de impedancia eléctrica (EIE) en la detección de lesiones preinvasoras del cuello uterino. Diseño: Estudio de validez diagnóstica ensamblado en un estudio de corte transversal realizado en 265 mujeres entre los 15 y 55 años, con reporte de citología anormal, referidas a colposcopia, evaluadas entre enero de 2008 y junio de 2010 en la red de patología cervical y colposcopia en los departamentos de Caldas y Risaralda (Colombia). Se realizaron lecturas de espectroscopia de impedancia eléctrica del cuello uterino, nueva toma de citología, colposcopia y biopsias dirigidas. Resultados: Los parámetros evaluados fueron la resistividad del espacio extracelular (R), la resistividad del espacio intracelular (S), la capacitancia de la membrana celular (Cm) y la frecuencia característica (Fc). Los resultados obtenidos para la variable R fueron: en tejidos escamosos normales de 21,27+/-16,48 (?-m), en lesiones de alto grado 4,28+/-2,28 (?-m) y en lesiones de bajo grado 10,1+/-4,59 (?-m), evidenciando una disminución de R en los tejidos lesionados respecto a los normales. La sensibilidad de la EIE fue de 0,88 para lesiones de alto grado y de 0,71 para lesiones de bajo grado. El área bajo las curvas COR para lesiones de alto grado/epitelio normal fue de 0,96; lesiones de bajo grado/epitelio normal 0,76 y lesión alto grado/bajo grado 0,90. Conclusiones: Este estudio permitió establecer que la EIE es una técnica útil para la detección y caracterización de lesiones intraepiteliales del cuello uterino, con una precisión diagnóstica mayor al 75%, con sensibilidad y especificidad superiores al 69%, un valor predictivo positivo aceptable y un valor predictivo negativo, cercano al 90%.

Effect of a new remineralizing biomaterial on the color of dental enamel

El objetivo de este trabajo fue describir el efecto de la composición de una sustancia remineralizante (SRM) y de la presión osmótica sobre el color dental mediante espectrofotometría. Se tomaron 104 premolares y molares humanos repartidos aleatoriamente en 2 grupos, cada uno de 52 especímenes. El grupo 1 se trató con la sustancia remineralizante SRM 55 (agente remineralizante 1) mezcla de 50 por ciento - 50 por ciento de mineral de grano fino y otro mineral de grano grueso y el grupo 2 se trató con la sustancia remineralizante SRM 91(agente remineralizante 2) contienen los mismos minerales en proporción 90 por ciento - 10 por ciento. A su vez cada grupo se dividió en 2 subgrupos, cada uno de 26 especímenes que se almacenaron así: Un subgrupo en saliva sintética con presión osmótica isotónica (PI) y el otro con presión osmótica hipotónica (PH). Se tomaron registros iniciales y finales con el espectrofotómetro Vita Easy Shade®. Con las lecturas se calcularon losparámetros de color (L*; a*; b*) y los índices de blanqueamiento (WIC; WIO; W). Los cambios de color (ΔL; ΔA; ΔB; yΔE) y los índices de blanqueamiento se compararon y se trataron todos mediante un análisis descriptivo. Las variables ΔA, ΔL, ΔB, ΔE e índice de blanqueamiento W se trataron con ANOVA y los índices WIC y WIO con un análisis de varianza no paramétrico Kruskal Wallis. Los resultados indican que la combinación A2 (SRM 91 y PI) afectó las variables ΔB y ΔE. La combinación B1 (SRM 55 Y PH) afectó las variables ΔA, ΔB y el índice de blanqueamiento WIO. Solamente SRM 91afectó la variable ΔL. La presión osmótica de la saliva y la sustancia remineralizante afectan el color del esmalte dental...

La experiencia vinculante afectiva del sujetoadolescente infractor / The binding affective experience of the transgressing adolescent

En el presente artículo presento los resultados de la investigación llevada a caboentre los años 2009 y 2010, sobre la experiencia vinculante afectiva del sujeto adolescente infractoren la ciudad de Manizales. Teóricamente la investigación se sustenta en los planteamientos de JhonBowlby sobre los Vínculos; epistemológicamente se fundamenta en una perspectiva construccionistaque indica que los vínculos se construyen en la interacción y en la experiencia cotidiana. En lometodológico, es una investigación hermenéutica de la que emergen tres categorías: el Vínculo conel Lugar mediado por la Movilidad Territorial; el Vínculo Parental, la Paradoja del Desligamiento yel Arraigo Profundo; y El Vínculo con los Otros… Lo Flexible es lo Vinculante.

Preservación de fertilidad con análogos agonistas de la hormona liberadora de gonadotropinas hipofisiarias (GnRH) en pacientes sometidas a tratamiento médico oncológico / Fertility preservation with agonist analgos of pituitary gonadotropin-relasing hormone (GnRH) in patients undergoing medical oncological treatment

Evaluar el potencial que tiene la utilización de los análogos de GnRH en la conservación de la función ovárica a mediano y largo plazo en pacientes sometidas a quimioterapia. Se evaluó la recuperación de la función ovárica de 6 pacientes sometidas a tratamiento oncológico que fueron tratadas concomitantemente con análogo de GnRH, mediante la medición de FSH, estradiol sérico y presencia de menstruaciones. En la Clínica Santa Sofía y Salud Chacao, Caracas. Cinco de las seis pacientes evaluadas (83,3 por ciento), recuperaron su función ovárica posterior al tratamiento oncológico y con análogo de GnRH. El uso de análogos de GnRH durante el tratamiento médico oncológico pareciera ser una alternativa válida para la protección de la función ovárica

To evaluate the potential of GnRH analogs use during chemotherapy in the preservation of short and long term ovarian function. Evaluation of ovarian function by measuring FSH, seric estradiol and menses, in six patient after use of GnRH analogs during chemotherapy. Clinica Santa Sofia y Salud Chacao, Caracas. Five of six patients (83,3 percent) reassumed their ovarian function after chemotherapy plus GnRH analog. The use of GnRH seems to be a good alternative to protect ovary function during chemotherapy

Evaluación pre y post implante del paciente con hipoacusia neurosensorial / Pre and post implant evaluation of the patient with sensorineural hearing loss

En la actualidad para el diagnostico de hipoacusia neurosensorial en niños recién nacidos se realizan una pruebas de tamizaje auditivo. Posteriormente para confirmar la perdida auditiva se realizan una batería de pruebas audiológicas con las cuales se obtienen los umbrales auditivos. Todos los pacientes deben ser valorados por el grupo interdisciplinario de implante coclear con el propósito de identificar el compromiso sensorial o neural donde se origina la lesión del paciente, los umbrales y habilidades auditivas, el nivel de desarrollo del lenguaje, su entorno familiar y la evaluación anatómica coclear que permita la inserción de un cable de electrodos y la estimulación eléctrica de la vía auditiva. El objetivo principal de un diagnostico temprano de la hipoacusia, es realizar una intervención inmediata con estimulación auditiva, preparándolos para el momento de la colocación del implante coclear. Una vez implantado, al paciente se le debe realizar un seguimiento tanto audiológico como del desarrollo de la percepción auditiva y del lenguaje para de esta forma determinar el beneficio del implante y realizar las modificaciones pertinentes tanto en la programación del implante como en las estrategias de rehabilitación.

Auditory screening tests are being performed nowadays in order to diagnose sensorineural hearing loss in new born babies. Later on and to be able to confirm the hearing loss, a set of auditory tests is conducted to obtain the auditory thresholds. It is necessary for the interdisciplinary cochlear implant group to appraise all patients in order to identify the extent of the sensory or neural damage where the patient’s lesion has been originated, the auditory thresholds and skills, the level of development of the language, his / her family environment and the cochlear anatomic appraisal that allows for the insertion of an electrode array as well as the electric stimulation of the auditory way. The main objective of an early diagnose of hearing loss, is to perform an immediate intervention with auditory stimulation, preparing them for the moment when the cochlear implant is to be inserted. Once having received the implant, it is important to follow up on the patient both, from the auditory point of view and the development of the auditory and language perception so that it can be determined the extent to which the implant has brought benefits and perform the corresponding modifications both in the implant programming and the rehabilitation strategies.

Factores asociados con lesiones neoplásicas del tracto genital inferior femenino en adolescentes del departamento de Caldas / Fatores associados com lesões neoplásticas do conduto genital inferior feminino em adolescentes do departamento de Caldas / Factors associated with neoplasm of the lower female genital tract in teens in the department of Caldas

En este artículo se presentan los resultados de un estudio epidemiológico analítico-descriptivo, cuyos objetivos fueron: conocer y determinar cómo se asocian factores biológicos y psicosociales con la presencia de lesiones neoplásicas del tracto genital inferior femenino en una población adolescente del departamento de Caldas, lo cual se relacionó, por un lado, con el análisis de la distribución y frecuencia de la población estudiada en cuanto a sexualidad, reproducción, factores culturales y factores psicosociales, y por otro, con la interacción de factores de riesgo en la aparición de dichas lesiones. Se tomó una muestra de 269 mujeres, seleccionadas después de su participación en jornadas educativas respecto a cáncer de cuello uterino y de mama. A este grupo se le aplicó una encuesta estructurada, diseñada para tal fin, la cual se diligenció directamente por los investigadores, previo consentimiento informado. A cada informante se le realizó citología y colposcopia, con un manejo estrictamente confidencial de la información. Los datos se analizaron retomando su distribución y frecuencia por categorías de variable, con lo cual se buscó determinar la asociación de los factores con la presencia o no de lesiones neoplásicas al contrastarlos con los resultados de citología y colposcopia.

This article presents the results of an epidemiologic analytical-descriptive study whose objectives were to examine and determine how biological and psychosocial factors are associated to the presence of neoplastic lesions of the lower female genital tract in a teenage population in the department of Caldas. The study analyzed the distribution and frequency of the studied population in terms of sexuality, reproduction, cultural and psychosocial factors, and secondly, the interaction of risk factors in the occurrence of such injury. A sample of 269 women, selected after their involvement in educational sessions related to cervical cancer and breast cancer, was interviewed by means of a structured survey, which was filled-out directly by the researchers, with prior consent from the women. A cervical smear and a colposcopy were performed on each patient, confidentially handling the information. The data was analyzed taking into consideration the distribution and frequency of the variable categories, looking to determine the association of factors with the presence or absence of neoplastic lesions, when contrasted with the cervical smear and colposcopy results.

Em este artigo apresentam se os resultados duma pesquisa epidemiológica analítico-descritivo, cujos objetivos foram: conhecer e determinar como associam se fatores biológicos y psicossociais com a presença de lesões neoplásicas do conduto genital inferior feminino numa povoação adolescente do Departamento de Caldas, o qual se relacionou, por um lado, com a análise da distribuição e freqüência da povoação estudada em quanto a sexualidade, reprodução, fatores culturais e fatores psicossociais, e por outro lado, com a interação de fatores de risco na aparição de ditas lesões. Tomou se uma amostra de 269 mulheres, selecionadas depois de sua participação em jornadas educativas respeito ao câncer de colo uterino e mama. A este grupo aplicou se uma enquete estruturada, desenhada tal fim, a qual diligenciou se direitamente por os pesquisadores, prévio consentimento informado. A cada informante realizou se citologia e colposcopia, com um manejo estritamente confidencial da informação. Os dados realizaram se retomando sua distribuição e freqüência por categorias de variável, com o qual se procurou determinar a associação dos fatores com a presença ou não de lesões neoplásicas ao contrastarlos com os resultados de citologias e colposcopias.