General Hospitalization and Intensive Care Unit-Related Factors of COVID-19 Patients in Northeastern Colombia: Baseline Characteristics of a Cohort Study.

Objective This study aims to describe demographic and clinical characteristics and the factors associated with the risk of COVID-19 general hospitalization and intensive care unit (ICU) care of patients who consulted in a third-level hospital in Santander, Colombia. Methods We used baseline data from an ambidirectional cohort study. We included all patients with positive real-time polymerase chain reaction (PCR) tests for COVID-19 who came to the emergency room (ER) for respiratory symptoms related to COVID-19. Information regarding patients' baseline characteristics and symptoms was collected through telephone interviews and review of medical records. Vital signs were extracted from medical records as well. Results We enrolled 3,030 patients, predominantly men, with a median age of 60 (interquartile range (IQR): 44-73). Symptoms of the acute phase varied between men and women. Men presented with more respiratory symptoms, and women had general symptoms. Hypertension, obesity, and diabetes were common risk factors for hospital admission. Antibiotic consumption may also play a role in hospital admission.  Conclusions Male sex, older age, hypertension, obesity, prior thrombotic events, and self-medicated antibiotics were associated with general hospitalization. Hypertension, obesity, diabetes, and cancer were associated with ICU admission. The Charlson comorbidity index (CCI) is a powerful tool for evaluate the impact of pre-existing health conditions on COVID-19 hospital admission. We highlight the importance of these findings as possible predictors in our region.

Mouse Papillomavirus L1 and L2 Are Dispensable for Viral Infection and Persistence at Both Cutaneous and Mucosal Tissues.

Papillomavirus L1 and L2, the major and minor capsid proteins, play significant roles in viral assembly, entry, and propagation. In the current study, we investigate the impact of L1 and L2 on viral life cycle and tumor growth with a newly established mouse papillomavirus (MmuPV1) infection model. MmuPV1 L1 knockout, L2 knockout, and L1 plus L2 knockout mutant genomes (designated as L1ATGko-4m, L2ATGko, and L1-L2ATGko respectively) were generated. The mutants were examined for their ability to generate lesions in athymic nude mice. Viral activities were examined by qPCR, immunohistochemistry (IHC), in situ hybridization (ISH), and transmission electron microscopy (TEM) analyses. We demonstrated that viral DNA replication and tumor growth occurred at both cutaneous and mucosal sites infected with each of the mutants. Infections involving L1ATGko-4m, L2ATGko, and L1-L2ATGko mutant genomes generally resulted in smaller tumor sizes compared to infection with the wild type. The L1 protein was absent in L1ATGko-4m and L1-L2ATGko mutant-treated tissues, even though viral transcripts and E4 protein expression were robust. Therefore, L1 is not essential for MmuPV1-induced tumor growth, and this finding parallels our previous observations in the rabbit papillomavirus model. Very few viral particles were detected in L2ATGko mutant-infected tissues. Interestingly, the localization of L1 in lesions induced by L2ATGko was primarily cytoplasmic rather than nuclear. The findings support the hypothesis that the L2 gene influences the expression, location, transport, and assembly of the L1 protein in vivo.

Comparación del ángulo de la guía condílea sagital obtenida del registro radiográfico y clínico en pacientes dentados / Comparison of sagittal condylar guidance obtained from radiographic and and clinical records in dentate patients

Objetivo: Comparar el ángulo de la guía condílea sagital obtenida del registro radiográfico y clínico en pacientes dentados. Materiales y métodos: La muestra estuvo conformada por un grupo único de estudio de 32 pacientes, en el que se evaluó la radiografía lateral estricta y los registros posicionales: en relación céntrica, registro protrusivo a 5 mm en lateralidad derecha y registro protrusivo a 5 mm en lateralidad izquierda. Con el registro posicional del arco facial se articuló el modelo superior, con el registro posicional en relación céntrica se articuló el modelo inferior, con los registros laterales protrusivos de los lados derecho e izquierdo se obtuvo la medida del ángulo de la guía condílea sagital para la programación del articulador semiajustable. El plan estadístico en la presente investigación utilizó el programa SPSS versión 24, la normalidad fue evaluada usando el test de Shapiro-Wilk, también se realizaron las pruebas de T de Student y correlación de Pearson. Resultados: Se determinó estadísticamente que el género y la edad influyen en la medida del ángulo de la guía condílea sagital. El método radiográfico presentó un ángulo de guía condílea de 35,69 ±5,18 y con el método clínico fue 35,69 ± 5,16 (p > 0,05). La prueba de correlación de Pearson sí mostró una correlación importante entre ambos métodos r = 0,948, p < 0,001. Conclusiones: Existe alta correlación en las medidas obtenidas del ángulo de la guía condílea sagital con los registros radiográficos y clínicos; esta concordancia permitiría reemplazar un método por el otro. (AU)

Objective: To compare the angle of the sagittal condylar guidance obtained from the radiographic and clinical records of dentate patients. Materials and Methods: The sample consisted of 32 patients in whom strict lateral radiography and positional records were performed: in centric relation, protrusive recording 5 mm in right laterality and protrusive recording 5 mm in left laterality. With the positional registration of the facebow, the upper model was articulated, while the lower model was articulated with the positional registration in centric relation, and with the protrusive lateral registrations on the right and left side the condylar guidance was obtained for programming the semi-adjustable articulator. Statistics were performed with the SPSS program version 24 in Spanish. Normality was evaluated using the Shapiro-Wilk test, for data with normal distribution, and the Student's T test and Pearson's correlation were performed in descriptive statistics. Results: The statistical analyses showed that gender and age influence the angle measurement of the sagittal condylar guide. The radiographic method presented a condylar guide angle of 35.69 ± 5.18, being 35.69 ± 5.16 with the clinical method (p> 0.05). Pearson's correlation test showed an important correlation between the two methods (r = 0.948, p <0.001). Conclusions: There is a high correlation in the measurements obtained from the angle of the sagittal condylar guide and the radiographic and clinical records, indicating that both methods are effective. (AU)

An updated review of idiopathic osteosclerosis of the jaws / Una revisión actualizada de la osteoesclerosis idiopática en los maxilares

Objective: The aim of this study was to update the concepts of the diagnosis of idiopathic osteosclerosis (IO) of the jaws by digital panoramic radiographs and cone beam tomography and describe the impact of this disease on oral and general health. Methods: A search of the main databases of dental medical research was carried out using the search terms "osteosclerosis, panoramic radiography, cone beam computed tomography, jaws". Articles without language restriction until September 30, 2020 were identified. The prevalence and clinical and radiographic characteristics of IO of the jaws were examined in 2D and 3D imaging studies, as well as the interaction during treatments in the various dental specialties. Results: We analyzed the current situation regarding the diagnosis of IO, with an update of the diagnostic criteria used to accurately identify IO in the latest generation imaging studies, as well determine its possible interactions in oral an general health. Conclusions: It is important to have a clear differential diagnosis of IO and be able to distinguish different radiopacities in the maxilla. Accurate reporting and monitoring of the morphometric characteristics are necessary taking into account the impact the presence of IO of the jaws has on future dental treatments. (AU)

Objetivo: El propósito de esta investigación fue actualizar las consideraciones para el diagnóstico de la osteoesclerosis idiopática en radiografías panorámicas digitales y tomografías de haz cónico, a fin de determinar sus implicancias en la salud oral y general. Métodos: Se realizó las pesquisas en las principales bases de datos de investigación médica estomatológica, utilizando las palabras "osteoesclerosis", "radiografía panorámica", "tomografía computarizada de haz cónico" y "mandíbula". Se identificaron artículos sin restricción de idioma, desde las primeras publicaciones hasta el 30 de septiembre del 2020. Se examinaron la prevalencia, las características clínicas y radiográficas en estudios imagenológicos de dos y tres dimensiones, así como su interacción durante los tratamientos realizados en las diversas especialidades estomatológicas. Resultados: La información obtenida nos permitió analizar la situación actual con respecto al diagnóstico de la OI y actualizar los criterios diagnósticos para una identificación certera de la OI en los estudios imagenológicos de última generación, así como sus posibles interacciones en la salud oral y general. Conclusiones: Es importante tener un criterio diagnóstico diferencial claro al distinguir las diferentes radiopacidades como la OI, que se pueden presentar en los maxilares, mediante un registro preciso de sus características morfométricas y seguimiento en el tiempo, teniendo en cuenta su existencia y sus implicancias en los tratamientos dentales a futuro. (AU)

Ileal Intussusception in an Adult Caused by a Locally Invasive Inflammatory Fibroid Polyp: A Case Report.

Inflammatory fibroid polyps (IFPs) are rare mesenchymal neoplasms affecting the gastrointestinal tract which are considered benign and noninvasive. We present a case of an invasive IFP in a 46-year-old woman who presented with signs of intestinal obstruction due to ileal intussusception. A segment of the small intestine was resected and subsequently intestinal continuity was restored. A polypoid lesion was found obstructing the lumen. Histopathology revealed a mesenchymal proliferation of spindle and stellate cells, without cytological atypia, arranged in a fibromyxoid stroma. The tumor cells were located in the submucosa but also infiltrated the muscularis propria and the subserosa and were CD34 positive. The molecular study by PCR showed mutation in exon 12 of the PDGFRA gene. IFP is considered a true neoplasm and can also be considered as a potentially invasive lesion.

Hidroxicloroquina para manejo de infección por SARS-CoV-2 Una revisión exploratoria / Hydroxychloroquine for treatment of SARS-CoV-2 infection An exploratory review

Resumen Introducción: la hidroxicloroquina se ha venido postulando en estos tiempos de pandemia como posible tratamiento eficaz frente a COVID-19. Esto ya que se ha demostrado por expertos chinos su capacidad para inhibir la replicación viral usando distintos mecanismos. En este momento es de vital importancia tener conocimiento acerca de las últimas investigaciones y ensayos clínicos en lo que respecta a un esquema de tratamiento efectivo que ayude a un mejor manejo de pacientes con infección por SARS-CoV-2. Objetivo: presentar la información disponible sobre el uso de hidroxicloroquina como opción de manejo para pacientes infectados por SARS-CoV-2. Material y métodos: se realizó una revisión siguiendo el marco metodológico sugerido por Arksey y O'Malley. Las bases de datos utilizadas fueron: PubMed, MedLine, Lilacs, Scopus, Clinical Trials, Cochrane y CNKI. Se incluyeron únicamente textos en español e inglés, finalmente se realizó una caracterización y resumen de los estudios pertinentes para esta revisión. Resultados: se incluyeron en la revisión 87 artículos académicos incluyendo estudios experimentales y no experimentales; todos con evidencia sobre el uso de hidroxicloroquina en COVID-19. Conclusiones: A la fecha no hay información científica disponible que sustente y tenga la suficiente evidencia para soportar el uso de la hidroxicloroquina como tratamiento farmacológico en la pandemia actual. Dos ensayos clínicos aleatorizados se contradicen en cuanto a la efectividad de la hidroxicloroquina; sin embargo, ambos comparten errores metodológicos y tamaños de muestra limitados; y un único ensayo no aleatorizado con los mismos errores demuestra efectividad de la hidroxicloroquina. En cuanto al perfil de seguridad se cuenta con información que evidencia una menor tasa de efectos adversos de la hidroxicloroquina frente a la cloroquina por lo que se preferiría su uso en caso de demostrar efectividad frente a COVID-19. Existen varios ensayos clínicos aleatorizados en curso que se espera esclarezcan las dudas que surgen al revisar la literatura.(Acta Med Colomb 2020; 45. DOI:https://doi.org/10.36104/amc.2020.1880).

Abstract Introduction: hydroxychloroquine has been recommended in this pandemic as a possible effective treatment for COVID-19. This is because Chinese experts have demonstrated its ability to inhibit viral replication through various mechanisms. At this juncture, it is vitally important to understand the latest research and clinical trials regarding an effective treatment regimen which would help improve the treatment of patients with SARS-CoV-2 infection. Objective: to present the available information regarding the use of hydroxychloroquine as a treatment option for patients infected with SARS-CoV-2. Material and methods: a review was carried out following the methodological framework proposed by Arksey and O'Malley. The data bases used were: PubMed, MedLine, Lilacs, Scopus, Clinical Trials, Cochrane and CNKI. Only texts in Spanish and English were included. Finally, the pertinent studies for this review were described and summarized. Results: a total of 87 academic articles were included in the review, including experimental and non-experimental studies, all containing evidence regarding the use of hydroxychloroquine in COVID-19. Conclusions: To date, there is no available substantiating scientific data with enough evidence to support the use of hydroxychloroquine as a pharmacological treatment for the current pandemic. Two randomized clinical trials contradict each other regarding the efficacy of hydroxychloroquine. However, they both share methodological errors and have small sample sizes. A single nonrandomized trial with the same errors shows efficacy of hydroxychloroquine. As far as the safety profile, there is data showing a lower rate of adverse effects for hydroxychloroquine compared with chloroquine, so its use would be preferred if it were to be proven effective against COVID-19. There are several randomized clinical trials underway which, it is hoped, will answer the questions raised by the literature review.(Acta Med Colomb 2020; 45. DOI:https://doi.org/10.36104/amc.2020.1880).

Facilitadores y barreras percibidos en la práctica de la actividad física en adolescentes escolarizados en Piedecuesta (Santander), en 2016: análisis cualitativo / Perceived facilitators and barriers to physical activity in adolescents in Piedecuesta (Santander), in 2016: qualitative analysis / Facilitadores e barreiras evidentes na prática da atividade física nos adolescentes em idade escolar em Piedecuesta Santander, em 2016: Análise qualitativa

Resumen Objetivo: Describir la percepción que tienen adolescentes escolarizados entre 12 y 16 años, en Piedecuesta (Santander), en 2016, sobre los facilitadores y las barreras que influyen en la práctica de la actividad física. Metodología: Análisis cualitativo desde un enfoque fenomenológico, con la participación de 20 adolescentes escolarizados que, mediante entrevistas semiestructuradas y un grupo focal, conversaron sobre la práctica, los beneficios, los entornos y la influencia y la compañía en relación con la actividad física, para identificar barreras y facilitadores. Resultados: La práctica de la actividad física se limitaba a las clases de educación física en la mayoría de los casos. El compañero principal en la práctica extracurricular era el padre del mismo sexo. La actividad física representaba una oportunidad para el disfrute, mejorar la salud física y mental, así como la contextura corporal, y para romper con la rutina diaria. La falta de tiempo por compromisos académicos fue la razón principal para no realizar actividad física. Los lugares públicos no siempre estaban disponibles, a menudo no se consideraban seguros. En la escuela, el espacio y las instalaciones eran inadecuados, y el uso estaba restringido. Conclusiones: La escuela es un punto de convergencia importante para la práctica de la actividad física, lo que sugiere la necesidad de fortalecer el plan de estudios al respecto; este entorno es un facilitador potencial para aumentar el nivel de actividad física en adolescentes. También se percibe como barrera, dado que la práctica interfiere con las actividades académicas. Las mejoras en la seguridad y el atractivo estético en el entorno comunitario se visibilizan como un facilitador para promover la actividad física.

Abstract Objective: Describe the perception of adolescents aged between 12 and 16 years, in Piedecuesta (Santander), in 2016, about the facilitators and barriers that influence physical activity. Methodology: Qualitative analysis from a phenomenological approach, with the participation of 20 adolescents who talked about the practice, benefits, environments, influence and company in connection with physical activity , to identify barriers and facilitators, through semi-structured interviews and a focus group. Results: Physical activity was limited to physical education classes in most cases. The main companion in extracurricular physical activity was the parent of the same sex. Physical activity represented an opportunity for enjoyment, improvement of physical and mental health, as well as body composition, and to have a break in their daily routine. Lack of time due to academic commitments was the main reason for not doing physical activity. Public places were not always available and they were often not considered to be safe. Space and facilities at school were inadequate, and their use was restricted.. Conclusions: The school is an important point of convergence for doing physical activity, suggesting the need to strengthen the curriculum in this respect; this environment is a potential facilitator to increasing the level of physical activity in adolescents. It can also be seen as a barrier, given that the practice interferes with academic activities. Improvements in safety and aesthetic appeal in the surrounding community are seen as a facilitator to promoting physical activity.

Resumo Objetivo: Descrever a percepção que os adolescentes entre 12 e 17 anos de Piedecuesta em Santander, tiveram em 2016 sobre os facilitadores e as barreiras que influenciaram na prática da atividade física. Metodologia: Análise qualitativa partindo de um foco fenomenológico, com a participação de 20 adolescentes em idade escolar que, através de entrevistas semiestruturadas e um grupo focal, conversaram sobre a prática, os benefícios, os entornos, a influência e o acompanhamento relacionados com a atividade física, para identificar barreiras e facilitadores. Resultados: Na maioria dos casos, a prática da atividade física limitava-se às aulas de educação física. O companheiro principal na prática extracurricular era o genitor ou genitora do mesmo sexo. A atividade física representava uma oportunidade para disfrutar, melhorar a saúde física e mental, além da estrutura corporal e para sair da rotina diária. A falta de tempo devido às responsabilidades escolares foi a principal razão para não realizarem atividade física. Os lugares públicos nem sempre estavam disponíveis e geralmente não são considerados seguros. Na escola, o espaço e as instalações eram inadequados e o uso estava restrito. Conclusões: A escola é um importante ponto de convergência para a prática da atividade física, o que determina a necessidade de fortalecer o currículo relacionado; esse ambiente é um facilitador potencial para aumentar o nível de atividade física nos adolescentes. Também se percebe como barreira, já que a prática interfere com as atividades escolares. As melhorias na segurança e um espaço comunitário mais atraente do ponto de vista estético são determinantes como facilitadores para a promoção da atividade física.

Early Detection of Hyperprogressive Disease in Non-Small Cell Lung Cancer by Monitoring of Systemic T Cell Dynamics.

Hyperprogressive disease (HPD) is an adverse outcome of immunotherapy consisting of an acceleration of tumor growth associated with prompt clinical deterioration. The definitions based on radiological evaluation present important technical limitations. No biomarkers have been identified yet. In this study, 70 metastatic NSCLC patients treated with anti-PD-1/PD-L1 immunotherapy after progression to platinum-based therapy were prospectively studied. Samples from peripheral blood were obtained before the first (baseline) and second cycles of treatment. Peripheral blood mononuclear cells (PBMCs) were isolated and differentiation stages of CD4 lymphocytes quantified by flow cytometry and correlated with HPD as identified with radiological criteria. A strong expansion of highly differentiated CD28- CD4 T lymphocytes (CD4 THD) between the first and second cycle of therapy was observed in HPD patients. After normalizing, the proportion of posttreatment/pretreatment CD4 THD was significantly higher in HPD when compared with the rest of patients (median 1.525 vs. 0.990; p = 0.0007), and also when stratifying by HPD, non-HPD progressors, and responders (1.525, 1.000 and 0.9700 respectively; p = 0.0025). A cut-off value of 1.3 identified HPD with 82% specificity and 70% sensitivity. An increase of CD28- CD4 T lymphocytes ≥ 1.3 (CD4 THD burst) was significantly associated with HPD (p = 0.008). The tumor growth ratio (TGR) was significantly higher in patients with expansion of CD4 THD burst compared to the rest of patients (median 2.67 vs. 0.86, p = 0.0049), and also when considering only progressors (median 2.67 vs. 1.03, p = 0.0126). A strong expansion of CD28- CD4 lymphocytes in peripheral blood within the first cycle of therapy is an early differential feature of HPD in NSCLC treated with immune-checkpoint inhibitors. The monitoring of T cell dynamics allows the early detection of this adverse outcome in clinical practice and complements radiological evaluation.

Prevalence of arterial hypertension in Colombia. Systematic review and meta-analysis / Prevalencia de hipertensión arterial en Colombia. Revisión sistemática y metaanálisis

Abstract Objective: to determine the prevalence of arterial hypertension in individuals ≥18 years old and its behavior according to sex and age in Colombia. Data source: the search was carried out in the PubMed, Lilacs, Ovid, Google Scholar and Scielo databases, and was not restricted by study year. Search strategy: (Hypertension) AND (Colombia) or (Hipertensión Arterial) AND (Colombia) or (Cardiovascular Risk Factors) AND (Colombia). Study selection: descriptive population and cross-sectional studies which determined the prevalence of hypertension in the population ≥18 years old were included. With multiple reviewers, 23 studies fulfilled the inclusion criteria. Data extraction: the quality of the information was verified according to the STROBE declaration and by evaluating the risk of bias in each study. Data synthesis: prevalence was determined along with confidence intervals and heterogeneity. The prevalence of hypertension (52,570 individuals) is 24% [95% CI 19-29%; p<0.001]. It is slightly more prevalent in males (29%) [95% CI 23-37%; p<0.001], increases proportionally with age and is less prevalent in urban areas (21%) [95% CI 14-29%; p<0.001]. The tendency changes according to sex-age; it is more prevalent in males at early ages and in females beginning at middle age. Conclusion: There is a tendency towards increased prevalence of hypertension in Colombia. There are no major differences between the sexes. Prevalence varies in relation to age, age-sex and geographical area of residence. This is explained by the changing physiological behavior and the socioeconomic level of the population sample included. (Acta Med Colomb 2019; 44. DOI:https://doi.org/10.36104/amc.2019.1293).

Resumen Objetivo: determinar la prevalencia de hipertensión arterial en personas ≥18 años de edad y su comportamiento según género y edad en Colombia. Fuente de los datos: la búsqueda fue realizada en bases de datos PubMed, Lilacs, Ovid, Google Académico y Scielo. No restricción por año de realización de los estudios. Estrategia de búsqueda: (Hypertension) AND (Colombia) o (Hipertensión Arterial) AND (Colombia) o (Cardiovascular Risk Factors) AND (Colombia). Selección de los estudios: se incluyeron estudios descriptivos, de corte poblacional y transversal que determinen la prevalencia de hipertensión en población ≥18 años de edad. Con revisores múltiples, 23 estudios cumplieron los criterios de inclusión. Extracción de los datos: la calidad de la información verificada según la declaración STROBE y evaluando el riesgo de sesgo en cada estudio. Síntesis de los datos: se determina la prevalencia con intervalos de confianza y heterogeneidad. La prevalencia de hipertensión (52 570 individuos) es 24% [IC 95% 19-29%; p<0.001]. Ligeramente más prevalente en hombres 29% [IC 95% 23-37%; p<0.001], aumenta proporcionalmente con la edad y menos prevalente en área urbana 21% [IC 95% 14-29%; p<0.001]. La tendencia cambia en relación a género-edad, prevalece más en hombres a edad temprana y en mujeres a partir de la adultez media. Conclusión: Existe una tendencia al aumento de la prevalencia de hipertensión en Colombia. No hay mayores diferencias entre géneros. Existe variabilidad de prevalencia en relación con la edad, edad-género y área geográfica de residencia; esto explicado por el comportamiento fisiológico cambiante y el nivel socioeconómico de la muestra poblacional incluida. (Acta Med Colomb 2019; 44. DOI:https://doi.org/10.36104/amc.2019.1293).

HIV Infection Stabilizes Macrophage-T Cell Interactions To Promote Cell-Cell HIV Spread.

Macrophages are susceptible to HIV infection and play an important role in viral dissemination through cell-cell contacts with T cells. However, our current understanding of macrophage-to-T cell HIV transmission is derived from studies that do not consider the robust migration and cell-cell interaction dynamics between these cells. Here, we performed live-cell imaging studies in 3-dimensional (3D) collagen that allowed CD4+ T cells to migrate and to locate and engage HIV-infected macrophages, modeling the dynamic aspects of the in situ environment in which these contacts frequently occur. We show that HIV+ macrophages form stable contacts with CD4+ T cells that are facilitated by both gp120-CD4 and LFA-1-ICAM-1 interactions and that prolonged contacts are a prerequisite for efficient viral spread. LFA-1-ICAM-1 adhesive contacts function to restrain highly motile T cells, since their blockade substantially destabilized macrophage-T cell contacts, resulting in abnormal tethering events that reduced cell-cell viral spread. HIV-infected macrophages displayed strikingly elongated podosomal extensions that were dependent on Nef expression but were dispensable for stable cell-cell contact formation. Finally, we observed persistent T cell infection in dynamic monocyte-derived macrophage (MDM)-T cell cocultures in the presence of single high antiretroviral drug concentrations but achieved complete inhibition with combination therapy. Together, our data implicate macrophages as drivers of T cell infection by altering physiological MDM-T cell contact dynamics to access and restrain large numbers of susceptible, motile T cells within lymphoid tissues.IMPORTANCE Once HIV enters the lymphoid organs, exponential viral replication in T cells ensues. Given the densely packed nature of these tissues, where infected and uninfected cells are in nearly constant contact with one another, efficient HIV spread is thought to occur through cell-cell contacts in vivo However, this has not been formally demonstrated. In this study, we performed live-cell imaging studies within a 3-dimensional space to recapitulate the dynamic aspects of the lymphoid microenvironment and asked whether HIV can alter the morphology, migration capacity, and cell-cell contact behaviors between macrophages and T cells. We show that HIV-infected macrophages can engage T cells in stable contacts through binding of virus- and host-derived adhesive molecules and that stable macrophage-T cell contacts were required for high viral spread. Thus, HIV alters physiological macrophage-T cell interactions in order to access and restrain large numbers of susceptible, motile T cells, thereby playing an important role in HIV progression.

Compliance to treatment in diabetic pa tients from Bucaramanga, Colombia: a cross sectional study / Adherencia al tratamiento en pacientes diabéticos de Bucaramanga, Colombia: estudio de corte transversal

Objective: this study is aimed to evaluate knowledge about the disease, some behavioral habits and the level of compliance to pharmacological treatment, in a sample of diabetic patients, attending at hospital institution in the city of Bucaramanga (Colombia), during 2016. Diabetes mellitus is a chronic disease whose prevalence is increasing significantly in developing countries. Materials and Methods: cross sectional, descriptive study; a sample of 411 diabetic, aged over 35 years, who consulted at cardiovascular risk program, answered in the period between January and December 2016, a self-administered questionnaire that included the instruments IMEVID, Berbés and modified SMMS; Additionally, sociodemographic variables such as age, sex, stratum, education, were included. Results: 90% had a low socioeconomic status and 82.7% only reached primary studies or less. High Pharmacological adherence was observed in only 3.65%, medium adherence in 87.83% and low at 8.52%. Mean level of knowledge about diabetes was 13.32; Almost half (46.72%) scored below the average; Mean of glycosylated hemoglobin was 7.93%; 34.8% scored above this value. 18.7% have an inadequate lifestyle (IMEVID score <60). Low adherence found associated with: alcohol intake, IMEVID score <60, Ask more after eating, have a job and don't use insulin. Conclusion: it is necessary to esta-blish learning strategies and methodologies of motivation and training for diabetic patients, to improve quality of life and knowledge of the diabetes and, in this way,optimize the prognosis of the disease..(AU)

Objetivo: el estudio se propone evaluar el conocimiento sobre la enfermedad, algunos hábitos de comportamiento y el nivel de cumplimiento con el tratamiento farmacológico en una muestra de pacientes diabéticos que asistieron a una institución hospitalaria en la ciudad de Bucaramanga (Colombia) durante el 2016. La diabetes mellitus es una enfermedad crónica, su prevalencia está aumentando significativamente en los países en desarrollo. Materiales y Métodos: estudio de corte transversal, descriptivo; una muestra de 411 diabéticos, mayores de 35 años, que consultaron al programa de riesgo cardiovascular, respondieron en el período comprendido entre enero a diciembre de 2016, un cuestionario autoadministrado que incluía los instrumentos IMEVID, Berbés y SMMS modificado; Adicionalmente, se incluyeron variables sociodemográficas como edad, sexo, estrato, educación. Resultados: el 90% tenía un estatus socioeconómico bajo y el 82.7% solo alcanzó estudios primarios o menos. Se observó una alta adherencia farmacológica en solo el 3,65%, una adherencia media en el 87,83% y una baja en el 8,52%. El nivel medio de conocimiento sobre la diabetes fue de 13.32; Casi la mitad (46.72%) puntuó por debajo del promedio; La media de hemoglobina glicosilada fue de 7.93%; El 34.8% puntuó por encima de este valor. El 18.7% tiene un estilo de vida inadecuado (puntuación IMEVID <60). Se encontró que la baja adherencia estaba asociada con: consumo de alcohol, puntaje IMEVID <60, pedir más después de comer, tener un trabajo y no usar insulina. Conclusión: es necesario establecer estrategias de aprendizaje y metodologías de motivación y entrenamiento a los pacientes diabéticos, para mejorar la calidad de vida y el conocimiento de la diabetes, y de esta manera, optimizar el pronóstico de la enfermedad..(AU)

Abordaje diagnóstico de las alteraciones del cuerpo calloso: estado del arte / Diagnostic Approach to the Alterations of the Corpus Callosum: State of the Art

Las alteraciones del cuerpo calloso tienen una prevalencia en general de 1 por 1.000 nacidos vivos, estas alteraciones se encuentran en un 2-3 % de los niños con discapacidad o alteraciones del neurodesarrollo. Dentro de estos trastornos se incluyen la agenesia, la disgenesia, la hipoplasia y la hiperplasia. Debido a que estas alteraciones se asocian en un gran porcentaje con diferentes anomalías cerebrales y síndromes es relevante realizar un adecuado abordaje diagnóstico prenatal. Existen varios signos clave en la ecografía prenatal que permiten determinar si existe alguna alteración en el cuerpo calloso. La resonancia magnética se indica en casos de sospecha de alguna alteración en la ecografía prenatal y permite evaluar de manera más específica si existe alguna anomalía cerebral adicional. Esto es importante para determinar el pronóstico neurológico y realizar intervenciones oportunas.

Alterations of the corpus callosum have a general prevalence of 1/1,000 live births, and are found in 2-3% of children with developmental disabilities. These disabilities include agenesis, dysgenesis, hypoplasia and hyperplasia. Because these alterations are associated in a large percentage to different brain anomalies and syndromes, it is relevant to perform an adequate prenatal diagnostic approach. There are several key signs in the prenatal ultrasound that determine if there is any alteration in the corpus callosum. Magnetic resonance is indicated in cases of suspected anomalies in the prenatal ultrasound, and it can also evaluate more specifically if an additional cerebral anomaly is present. This is important because it allows to determine the neurological prognosis and to perform promptly interventions.

The International Polycap Study-3 (TIPS-3): Design, baseline characteristics and challenges in conduct.

BACKGROUND: It is hypothesized that in individuals without clinical cardiovascular disease (CVD), but at increased CVD risk, a 50% to 60% reduction in CVD risk could be achieved using fixed dose combination (FDC) therapy (usually comprised of multiple blood-pressure agents and a statin [with or without aspirin]) in a single "polypill". However, the impact of a polypill in preventing clinical CV events has not been evaluated in a large randomized controlled trial. METHODS: TIPS-3 is a 2x2x2 factorial randomized controlled trial that will examine the effect of a FDC polypill on major CV outcomes in a primary prevention population. This study aims to determine whether the Polycap (comprised of atenolol, ramipril, hydrochlorothiazide, and a statin) reduces CV events in persons without a history of CVD, but who are at least at intermediate CVD risk. Additional interventions in the factorial design of the study will compare the effect of (1) aspirin versus placebo on CV events (and cancer), (2) vitamin D versus placebo on the risk of fractures, and (3) the combined effect of aspirin and the Polycap on CV events. RESULTS: The study has randomized 5713 participants across 9 countries. Mean age of the study population is 63.9 years, and 53% are female. Mean INTERHEART risk score is 16.8, which is consistent with a study population at intermediate CVD risk. CONCLUSION: Results of the TIP-3 study will be key to determining the appropriateness of FDC therapy as a strategy in the global prevention of CVD.

Polypill: an affordable strategy for cardiovascular disease prevention in low-medium-income countries.

The simplification of fixed dose medications by using a single 'polypill' is an attractive strategy to improve adherence to medications which has shown benefit to cardiovascular risk factor control and cardiovascular disease prevention or delay in the progression of these diseases. We review the evidence obtained from a series of clinical trials demonstrating an improvement in adherence to the polypill compared to the use of each compound separately, and found similar or better control of the classical cardiovascular risk factors and a similar safety profile. These results suggest that the use of the polypill could have a beneficial impact in cardiovascular morbidity and mortality. Furthermore, the polypill has the potential to improve cost effectiveness and is simple to use. However, before recommending the implementation of the polypill in programs aimed at primary and secondary cardiovascular prevention, we are awaiting the results of several current clinical trials aimed at measuring the impact on the frequency of major cardiovascular outcomes, particularly in low-medium-income countries.

Validez de constructo de la escala NEI-VFQ-25 en una población colombiana / Validity of NEI-VFQ scale construct in a Colombian population

Objetivo: medir la validez de constructo de la escala NEI-VFQ-25 en una población colombiana con enfermedad ocular crónica. Métodos: se evaluó la tecnología diagnóstica mediante el Modelo Rasch. Se calculó una muestra para garantizar la estabilidad en la calibración de los ítems. Se incluyeron hombres y mujeres de 40-70 años de edad, con enfermedad ocular crónica bilateral, a quienes, previo consentimiento informado, se les aplicó, vía telefónica, la escala NEI-VFQ-25. Resultados: se entrevistaron 206 personas con edad promedio de 58,1 años, quienes presentaban glaucoma (21,7 por ciento), catarata (36,9 por ciento) o algún tipo de retinopatía (35,4 por ciento). Se eliminaron dos ítems del cuestionario original, por funcionamiento diferencial (DIF) y cuatro por ajuste al modelo. Se estandarizaron todas las preguntas a tres opciones de respuesta, y quedó una escala conformada por 17 ítems que cumplía con los criterios de validez de constructo. Conclusión: la escala NEI-VFQ mostró validez sustantiva, de contenido, generalización y estructural, en personas de 40 a 70 años con diagnóstico de glaucoma, catarata y retinopatía(AU)

Objective: to measure the validity of the NEI-VFQ-25 scale construct in a Colombian population with chronic ocular disease. Methods: the diagnostic technology was evaluated through Rasch model. A sample was estimated to guarantee the stability of item gaging. Forty to seventy years-old men and women, with chronic bilateral ocular disease, participated. After informed consent, they were applied the NEI-VFQ-25 scale by phone. Results: two hundred and six persons aged 58.1 years as average, who presented with glaucoma (21.7 percent), cataract (36.9 percent) or some type of retinopathy (35.4 percent). Two items were taken out of the original questionnaire because of differential functioning and four items due to model adjustment. All the questions were then standardized to have three response options, and finally the scale was made up of 17 items which met the validity criteria for construct. Conclusions: NEI-VFQ scale showed substantial, content, generalization and structural validity for application in 40 to 70 years old people with diagnosis of glaucoma, cataract and retinopathy(AU)

Variations in oxygen concentration cause differential antioxidant response and expression of related genes in Beauveria bassiana.

The entomopathogenic fungus Beauveria bassiana is widely used in pest biocontrol strategies. We evaluated both the antioxidant response mediated by compatible solutes, trehalose or mannitol, and the expression of related genes using oxygen pulses at three oxygen concentrations in solid state culture (SSC): normal atmosphere (21% O2), low oxygen (16% O2) and enriched oxygen (26% O2). Trehalose concentration decreased 75% after atmospheric modifications in the cultures, whereas mannitol synthesis was three-fold higher under the 16% O2 pulses relative to normal atmosphere (100 and 30 µg mannitol mg(-1) biomass, respectively). Confirming this result, expression of the mpd gene, coding for mannitol-1-P dehydrogenase (MPD), increased up to 1.4 times after O2 pulses. The expression of the bbrgs1 gene, encoding a regulatory G protein related to conidiation, was analysed to explain previously reported differences in conidial production. Surprisingly, expression of bbrgs1 decreased after atmospheric modification. Finally, principal component analysis (PCA) indicated that 83.39% of the variability in the data could be explained by two components. This analysis corroborated the positive correlation between mannitol concentration and mpd gene expression, as well as the negative correlation between conidial production and bbrgs1 gene expression. This study contributes to understanding of antioxidant and molecular response of B. bassiana induced under oxidant conditions.

Validez de la prueba de actividad enzimática de la glucocerebrosidasa para el diagnóstico de enfermedad de Gaucher / Validez de la prueba de actividad enzimática de la glucocerebrosidasa para el diagnóstico de enfermedad de Gaucher

INTRODUCCIÓN: La enfermedad de Gaucher es ocasionada por deficiencia o ausencia de enzima Glucocerebrosidasa. Esta deficiencia favorece la acumulación del sustrato glucocerebrósido en los lisosomas de macrófagos (células de Gaucher) y monocitos, causando daño celular y disfunción orgánica. Existen tres tipos, según la ausencia (I) o presencia (II y III) de afección neurológica. En Colombia actualmente hay 139 enfermos con diagnóstico de enfermedad de Gaucher (Asociación Colombiana de Pacientes con Enfermedad Lisosomal - ACOPEL, Informe verbal 2014). La sospecha clínica se confirma midiendo actividad enzimática de Glucocerebrosidasa en leucocitos o sangre seca. En individuos con EG, la actividad enzimática está entre 0%-15% de su actividad normal. El tratamiento con terapia de reemplazo enzimático suele ser eficaz. No hay tratamiento para daño cerebral. Esta evaluación hace parte del esfuerzo del Ministerio de Salud y Protección Social de actualizar las tecnologías disponibles para el diagnóstico de enfermedades huérfanas como parte del proceso de actualización del plan obligatorio de salud. OBJETIVO: Evaluar la validez diagnóstica de la prueba de actividad enzimática de la glucocerebrosidasa en sangre seca y en leucocitos, en pacientes sospechosos de la enfermedad de Gaucher. METODOLOGÍA: Búsqueda sistemática y exhaustiva de literatura (MEDLINE, EMBASE, LILACS, CDSR y DARE), según estándares de la Colaboración Cochrane. Usando criterios QUADAS-2, dos revisores independientes evaluaron la calidad de la literatura. La información básica de los artículos seleccionados e incluidos se extrajo usando un formato estándar diseñado en Excel®. RESULTADOS: Se realizaron 5 búsquedas encontrándose 75 referencias, una vez se removieron los duplicados quedaron 47 referencias. Se excluyeron 46 artículos obtenidos de la búsqueda. Los resultados están basados en el estudio de validez diagnostica de Stroppiano y cols., que tuvo una calidad de 16/18. Este estudio reportó una sensibilidad del 88,2% (IC 95% 72.9­100%), especificidad del 88,5% (IC 95% 85.5­91.5%), valor predictivo positivo 23.4% y valor predictivo negativo de 99.5% para un punto de corte ajustado de 4.4, para la actividad enzimática de glucocerebrosidasa en sangre seca comparada con la prueba en leucocitos. CONCLUSIONES: La evidencia sobre la medición enzimática de glucocerebrosidasa en sangre seca es escasa, sin embargo el único artículo encontrado es de alta calidad, de acuerdo con la escala QUADAS-2. Esta evidencia nos permitió establecer que la prueba tiene muy buen desempeño como método diagnóstico inicial, pero no es concluyente debido a la alta proporción de falsos positivos. Esta prueba es de utilidad por su facilidad en la toma y transporte, pero sus resultados deben confirmarse con la medición de la actividad enzimática de la glucocerebrosidasa en leucocitos.(AU)

Diagnóstico genético preimplantacional: análisis de aneuploidías únicas / Preimplantational genetic diagnosis: single aneuploidies analysis

Introducción: De las causas más conocidas en cuanto a la falta del éxito en el embarazo con tratamientos de reproducción asistida son aquellas relacionadas a las aneuploidías cromosómicas presentes en los embriones. El diagnóstico genético preimplantacional (PGD) es una técnica empleada en reproducción asistida para detectar estas anomalías, seleccionando aquellos que sean cromosómicamente normales, para luego transferirlos al útero de la paciente. Los embriones con aneuploidías únicas podrían tener la capacidad de sobrevivir y lograr la implantación, y por lo tanto, sin diagnóstico previo, estas podrían pasar desapercibidas. Objetivos: Determinar la incidencia de aneuploidías únicas en embriones de buena calidad embrionaria en el día 3 de desarrollo hasta blastocisto. Diseño: Estadístico y experimental. Instituciones: Reprogenetics Latinoamérica y Centro de Reproducción asistida, de la Clínica Concebir. Material Biológico: Muestras de biopsia embrionaria. Metodología: Análisis comparativo de resultados a partir de la evaluación de cada muestra obtenida por biopsia en el día tercero y día quinto de desarrollo embrionario, realizando el PGD por hibridación in situ (FISH) y genómica comparada (aCGH), respectivamente. Resultados: El 62,9% de embriones que presentaron monosomías únicas al tercer día de desarrollo embrionario resultaron ser de 8 células. Pero cuando se evaluó por aCGH en día cinco, 42,3% resultó anormal, y de estos 37,5% perteneció al estadio de 8 células. El índice de monosomías únicas en blastocisto resultó ser 57,9% de un total de 84,2% de aneuploidías únicas. Conclusiones: Los embriones de 8 células en el tercer día de desarrollo embrionario son los más probables de llegar al estadio de blastocisto, así como presentar aneuploidías únicas.

Background: Known causes of unsuccessful pregnancy in couples undergoing assisted reproduction treatment include embryo aneuploidies. Preimplantation genetic diagnosis (PGD) is a technique used in assisted reproduction in order to detect these abnormalities, select embryos chromosomally normal and subsequently transfer to the patients’ uterus. Embryos with single aneuploidies may have the ability to survive and achieve unnoticed implantation. Objectives: To determine incidence of single aneuploidies in good quality embryos in third day of development to blastocyst. Design: Statistical and experimental study. Setting: Reprogenetics Latin-America and Assisted Reproduction Center - Concebir. Biologic material: Samples of embryo biopsies. Methods: Comparative analysis of results from evaluation of each sample obtained by embryo biopsy on the third and fifth days of embryonic development, performing PGD by respectively in situ hybridization (FISH) and comparative genomics (aCGH). Results: On third day of embryonic development 62.9% of embryos with single monosomy had 8-cell morphology. Though when evaluated by aCGH in the blastocyst stage 42.3% were abnormal and 37.5% of these belonged to the 8-cell stage. Single monosomies index in the blastocyst stage was 57.9% in 84.2% of single aneuploidies. Conclusions: Eight-cell embryos on the third day of embryonic development are most likely to reach blastocyst stage and have single aneuploidies.

Abuso de alcohol en niños y adolescentes escolarizados y factores asociados / Alcohol abuse and associated factors in student children and adolescents

Introducción: Estudios previos han confirmado altas prevalencias de abuso de alcohol en adolescentes escolarizados de Bucaramanga; sin embargo, son escasos los estudios sobre factores asociados. Objetivo: Evaluar la prevalencia del abuso de alcohol en niños y adolescentes escolarizados de Bucaramanga, Colombia, y sus factores asociados. Metodología: Una muestra aleatoria de estudiantes adolescentes completó un cuestionario anónimo acerca del consumo de alcohol, sustancias ilegales y legales, el cuestionario CAGE y una serie de escalas y cuestionarios que evaluaban factores de riesgo para abuso de alcohol. Para ajustar por variables de confusión, se realizó un análisis multivariado mediante un modelo de regresión logística. Resultados: Se encuestaron 2.916 estudiantes. La edad de la muestra estuvo entre 10 y 22 años, con una media de 14,4 años (DE = 1,65); 51,1% eran mujeres, 36% cursaban básica superior (10° y 11°), el 17,66 % en colegios privados. El patrón de consumo abusivo de alcohol medido por la escala del CAGE fue del 14,6% (IC95%; 13,3-16,0%). Los factores asociados fueron: edad (OR = 1,15, IC95% 1,04-1,27), tener un hermano consumidor de cigarrillo o alcohol (OR = 1,48, IC95% 1,01-1,17), comportamiento antisocial (OR = 3,03, IC95% 2,12-4,32), mejor amigo que consume sustancias ilícitas (OR =1,71, IC95% 1,06-2,76), mejor amigo que fuma o consume alcohol (OR = 2,01, IC95% 1,40-2,88). Conclusiones: Uno de cada siete estudiantes presentó un patrón de consumo abusivo de alcohol. La influencia de los amigos, la familia, la edad y el comportamiento antisocial fueron los factores asociados…

Introduction:Previous studies have confirmed high prevalence of alcohol abuse in adolescent students from Bucaramanga, Colombia. However, few studies on the associated factors have been carried out. Objective: Assessment of prevalence of alcohol abuse and associated factors in student children and adolescents from Bucaramanga. Methodology: A random sample of adolescent students completed an anonymous questionnaire about the consumption of alcohol, illegal and legal substances, together with the CAGE questionnaire and a series of scales and questionnaires assessing risk factors for alcohol abuse. To adjust for confusing variables, a multivariate analysis was performed using a logistic regression model. Results: 2916 students were surveyed with an average age between 10 and 22, and a mean of 14.4 years (SD 1.65), 51.1% were female, 36% were in the last two years of high school (10thand 11th grades), and 17.66% were in private schools. The alcohol abuse pattern as measured by the CAGE scale was 14.6% (95% CI, 13.3 - 16.0%). The associated factors were: age (OR: 1.15, 95% CI 1.04 - 1.27), having a smoking or consuming alcohol sibling (OR: 1.48, 95% CI, 1.01 - 1.17) antisocial behavior (OR 3.03, 95% CI, 2.12 - 4.32) and best friend who uses illicit substances (OR 1.71, 95% CI, 1.06 - 2.76), best friend who smokes or drinks alcohol (OR 2.01, 95% CI, 1.40 - 2.88). Conclusions: One out of 7 students showed a pattern of alcohol abuse. The associated factors were the influence of friends, family, age and antisocial behavior…

Validez y confiabilidad de dos escalas de siluetas para valorar la imagen corporal en estudiantes adolescentes / Validity and reliability of two silhouette scales to asses the body image in adolescent students

Objetivo: Determinar la validez y confiabilidad de la escala de los trece dibujos del contorno de la figura (13-CS) y del Standard Figural Stimuli (SFS) para la evaluación de la imagen corporal en estudiantes adolescentes de Bucaramanga. Métodos: Se evaluó una muestra probabilística de 189 estudiantes con las dos escalas. Dos semanas después se repitió la valoración junto con la talla, el peso, el porcentaje de grasa corporal, el cuestionario SCOFF y la escala de autoestima de Rosenberg. Resultados: La edad promedio fue 14,1 años; 67,2% fueron mujeres. La correlación de la 13-CS y SFS con el índice de masa corporal, peso y porcentaje de grasa corporal fue 0,61, 0,74, 0,40 y 0,72, 0,55, 0,46, respectivamente. La correlación de la insatisfacción de la imagen corporal con el SCOFF y la Rosemberg fue 0,43 y -0,26 con la 13-CS y 0,50 y -0,23 con la SFS. La reproducibilidad prueba-reprueba de la figura percibida e ideal fue de 0,93 y 0,90 con la 13-CS y de 0,85 y 0,78 con la SFS. Conclusión: La validez concurrente de ambas escalas fue buena. La reproducibilidad de la 13-CS fue excelente, y la de la SFS fue buena…

Objective: To determine the validity and reliability of the 13-figure images scale (13-CS) and Standard Figural Stimuli (SFS) for the evaluation of body images in adolescent students from Bucaramanga. Methods: A probabilistic sample with 189 students was evaluated with the two scales. Two weeks later, the valuation together with the size, weight, percentage of body fat, SCOFF questionnaire and Rosenberg self-esteem valuation was repeated. Results:The average age was 14.1 years; 62.7% were women. The correlation of the 13-CS and SFS with body fat index, weight and body fat percentage was 0.61, 0.74, 0.40 and 0.72, 0.55, 0.45 respectively. The correlation of dissatisfaction with body image according to the SCOFF and the Rosenberg scales was 0.43 and 0.26 with the 13-CS; 0.50 and -0.23 with the SFS. The reproducibility shows that perceived and ideal figure was 0.93 and 0.90 with the 13-CS; and 0.85 and 0.78 with the SFS. Conclusion: the concurrent validity of both scales was good. The reproducibility of the 13-CS was excellent while the SFS was good…