Historical evolution of cancer genomics research in Latin America: a comprehensive visual and bibliometric analysis until 2023.

Background: Cancer genomics, as an interdisciplinary research area within the Global Cancer Research agenda, genomics and precision medicine, its important in research and clinical practice in Latin America. To date, there has been no study investigating evolution of this area in this region. The aim of this study was to evaluate for first time, the historical evolution of cancer genomics research in Latin America. Methods: Bibliometric cross-sectional study of documents on cancer genomics published by Latin American authors until 2023 in Scopus was performed. Statistical and visual analysis was performed with R programming language. Results: A total of 1534 documents were obtained. The first document of cancer genomics research was published in 1997, marking the inception of a 26-year evaluation period that extended until 2023. Among the documents, 74.3% (n = 1140) constituted original articles, followed by 22.7% (n = 349) classified as reviews. International collaboration was observed in 6.5% (n = 100) of the articles. Within the compilation of the ten most prolific authors in this region, 90% of them are from Brazil. This observed pattern extends to affiliations as well, wherein the Universidade de São Paulo emerges as the most active institution (n = 255 documents). This arrangement firmly establishes Brazil's prominence as the preeminent country in the region concerning cancer genomics research, showcasing robust collaboration networks both regionally and intercontinentally. An important transition in the studied hot topics over the last 20 years was identified, from the exploration of the human genome and the characterization of genomic and proteomic cancer profiles (1997-2010) to an in-depth investigation of cancer stem cells and personalized medicine (2011-2023). Among the array of cancer types under study, predominant attention has been directed towards breast, lung, prostate, and leukemia. Conclusion: Over the course of the past 26 years, a favorable and notable evolution has characterized cancer genomics research within Latin America, with Brazil leading the way, which possess a robust network of regional and intercontinental collaboration. Furthermore, the lines of research and hot topics have change in harmony with the region's objectives, strategies, and requisites.

Factors associated with suicide in physicians: a silent stigma and public health problem that has not been studied in depth.

Suicide is a complex and multifaceted public health issue that affects individuals from all walks of life, including healthcare professionals such as physicians. According to research, physicians have a higher risk of suicide compared to the general population, with an estimated suicide rate that is two to three times greater than that of the general population. Suicide in physicians can have devastating consequences, not only for the individual but also for their patients and colleagues. The factors contributing to suicide in physicians are numerous and often interrelated. Physicians are exposed to numerous stressors in their daily lives, including long work hours, high workload, burnout, and exposure to traumatic events. These stressors can lead to mental health problems such as depression, anxiety, and substance use disorders, which in turn can increase the risk of suicide. In addition to work-related stressors, personal factors such as relationship problems, financial stress, and a history of mental health problems can also contribute to suicide risk in physicians. Stigma and shame around seeking help for mental health issues may also prevent physicians from seeking treatment, exacerbating the problem. Understanding the complex factors that contribute to suicide in physicians is crucial for developing effective prevention strategies. For this reason, it is necessary to know the behavior of this phenomenon and the factors associated with a higher risk of suicide in this population. However, taking into account that different regions of the world vary in socioeconomic, cultural, professional, occupational, and health attributes, it is to be expected that the behavior of these risk factors will also be heterogeneous. At present, it is presumed that there is a significant gap in the evidence, due to a predominance of evidence on this topic from high-income countries. Considering the importance of having a comprehensive understanding of the risk factors for suicide in the medical population and possible strategies to mitigate this condition, the aim of this review is to analyze the most recent evidence on these factors, and to assess the quality of the evidence and gaps that need to be studied further.

Photodynamic Antimicrobial Activity of a Novel 5,10,15,20-Tetrakis (4-Ethylphenyl) Porphyrin against Clinically Important Bacteria.

The growing emergence of microbes resistant to commercially available antibiotic therapies poses a threat to healthcare systems worldwide. Multiple factors have been associated with the increasing incidence of hospital-acquired infections caused by antibiotic-resistant pathogens, including the indiscriminate use of broad-spectrum antibiotics, the massive application of antibiotics in hospitals as a prophylactic measure, self-medication, and nonadherence to pharmacological therapies by patients. In this study, we developed a novel treatment to mitigate the impact of microbial resistance. We synthesized a benzoporphyrin derivative, 5,10,15,20-tetrakis (4-ethylphenyl) porphyrin (TEtPP), with a reaction yield close to 50%. TEtPP exhibited excellent photophysical properties (Φf = 0.12 ± 0.04 and ΦΔ = 0.81 ± 0.23) and was thereby assessed as a potential agent for antibacterial photodynamic therapy. The photophysical properties of the synthesized porphyrin derivative were correlated with the assayed antimicrobial activity. TEtPP showed higher activity against the MRSA strain under irradiation than in the absence of irradiation (minimum inhibitory concentration (MIC) = 69.42 µg/mL vs. MIC = 109.30 µg/mL, p < 0.0001). Similar behavior was observed against P. aeruginosa (irradiated MIC = 54.71 µg/mL vs. nonirradiated MIC = 402.90 µg/mL, p < 0.0001). TEtPP exhibited high activity against S. aureus in both the irradiated and nonirradiated assays (MIC = 67.68 µg/mL vs. MIC = 58.26 µg/mL, p = 0.87).

From Cell to Symptoms: The Role of SARS-CoV-2 Cytopathic Effects in the Pathogenesis of COVID-19 and Long COVID.

Severe Acute Respiratory Syndrome CoronaVirus 2 (SARS-CoV-2) infection triggers various events from molecular to tissue level, which in turn is given by the intrinsic characteristics of each patient. Given the molecular diversity characteristic of each cellular phenotype, the possible cytopathic, tissue and clinical effects are difficult to predict, which determines the heterogeneity of COVID-19 symptoms. The purpose of this article is to provide a comprehensive review of the cytopathic effects of SARS-CoV-2 on various cell types, focusing on the development of COVID-19, which in turn may lead, in some patients, to a persistence of symptoms after recovery from the disease, a condition known as long COVID. We describe the molecular mechanisms underlying virus-host interactions, including alterations in protein expression, intracellular signaling pathways, and immune responses. In particular, the article highlights the potential impact of these cytopathies on cellular function and clinical outcomes, such as immune dysregulation, neuropsychiatric disorders, and organ damage. The article concludes by discussing future directions for research and implications for the management and treatment of COVID-19 and long COVID.

Comparative Analysis of In-House RT-qPCR Detection of SARS-CoV-2 for Resource-Constrained Settings.

We developed and standardized an efficient and cost-effective in-house RT-PCR method to detect severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). We evaluated sensitivity, specificity, and other statistical parameters by different RT-qPCR methods including triplex, duplex, and simplex assays adapted from the initial World Health Organization- (WHO) recommended protocol. This protocol included the identification of the E envelope gene (E gene; specific to the Sarvecovirus genus), RdRp gene of the RNA-dependent RNA polymerase (specific for SARS-CoV-2), and RNase P gene as endogenous control. The detection limit of the E and the RdRp genes were 3.8 copies and 33.8 copies per 1 µL of RNA, respectively, in both triplex and duplex reactions. The sensitivity for the RdRp gene in the triplex and duplex RT-qPCR tests were 98.3% and 83.1%, respectively. We showed a decrease in sensitivity for the RdRp gene by 60% when the E gene acquired Ct values > 31 in the diagnostic tests. This is associated with the specific detection limit of each gene and possible interferences in the protocol. Hence, developing efficient and cost-effective methodologies that can be adapted to various health emergency scenarios is important, especially in developing countries or settings where resources are limited.

Glomerular Diseases in the Colombian Caribbean: Data from the Colombian Nephropathy Registry (NEFRORED®).

Our study aimed to describe the glomerular diseases, both primary glomerular disease (PGD) and secondary glomerular disease (SGD) in the Colombian Caribbean based on the first regional Colombian Nephropathy Registry (NEFRORED®). A descriptive and retrospective study of adult patients with glomerular diseases from the Colombian Caribbean region was made. All diagnoses by renal biopsy with light microscopy and immunofluorescence obtained between January 2008 and June 2018 were recorded. Eight hundred and seventy-one renal biopsies were obtained. The main clinical indication for biopsy was nephritic syndrome (36%). SGD was more frequent than PGD (55% vs. 45%). Within SGD group, lupus nephritis (LN) was the most frequent etiology (83%). Within PGD group, membranous nephropathy (33%) and focal segmental glomerulosclerosis (FSGS) (19%) were the most common glomerular diseases. At a 24-month follow-up, the patients with FSGS and paraproteinemia-mediated glomerular disease had the worst renal survival prognosis. This is the first Colombian Nephropathy Registry in a Caribbean population, demonstrating a high predominance of SGD due to LN.

MicroRNAs overexpressed in Crohn's disease and their interactions with mechanisms of epigenetic regulation explain novel aspects of Crohn's disease pathogenesis.

BACKGROUND: In this review, we were interested to identify the wide universe of enzymes associated with epigenetic modifications, whose gene expression is regulated by miRNAs with a high relative abundance in Crohn's disease (CD) affected tissues, with the aim to determine their impact in the pathogenesis and evolution of the disease. METHODS: We used HMDD and Bibliometrix R-package in order to identify the miRNAs overexpressed in CD. The identified enzymes associated with epigenetic mechanisms and post-translational modifications, regulated by miRNAs upregulated in CD, were analyzed using String v11 database. RESULTS: We found 190 miRNAs with great abundance in patients with CD, of which 26 miRNAs regulate the gene expression of enzymes known to catalyze epigenetic modifications involved in essentials pathophysiological processes, such as chromatin architecture reorganization, immune response regulation including CD4+ T cells polarization, integrity of gut mucosa, gut microbiota composition and tumorigenesis. CONCLUSION: The integrated analysis of miRNAs with a high relative abundance in patients with CD showed a combined and superimposed gene expression regulation of enzymes associated with relevant epigenetic mechanisms and that could explain, in part, the pathogenesis of CD.

Concordancia de tres escalas de riesgo cardiovascular en mujeres con diabetes mellitus tipo 2 / Concordance of three scales of cardiovascular risk in women with diabetes mellitus type 2

Resumen Introducción: establecer estimadores del riesgo cardiovasculares (RCV) que permitan tener igual concordancia dentro del subconjunto de la población es importante para diseñar terapias que briden ventajas a cada subpoblación. Objetivo: comparar las escalas Framingham, SCORE/REGICOR y ACC/AHA en una corte de mujeres con diabetes. Materiales y métodos: se realizó un estudio descriptivo transversal en donde se compararon las escalas Framingham, SCORE/REGICOR y ACC/AHA para identificar los niveles de riesgo cardiovascular en mujeres con diabetes mellitus tipo 2. Los datos se recopilaron entre 2014 y 2016 en pacientes del Centro Endocrinológico del Caribe ubicado en Barranquilla, Colombia. Se consideraron variables sociodemográficas, antropométricas y clínicas. Resultados: el 100% de la muestra (n=107) eran mujeres con una edad media de 58,5±13,646 años. Según la escala Framingham el 72,9% (n=78) se clasificó como de riesgo bajo; el 21,5% (23), intermedio, y el 5,6% (n=6), alto. Con la escala SCORE/REGICOR el 57,0% (n=61) estuvo en riesgo bajo; el 42,1% (n=45), en moderado, y el 0,9% (n=1), en alto. Finalmente, mediante la escala ACC/ AHA el 35,5% (n=38) se clasificó en riesgo bajo y el 64,5% (n=69), en elevado. Conclusiones: en el presente estudio se observó una baja concordancia al comparar las escalas de riesgo cardíaco analizadas (Framingham, SCORE/REGICOR y ACC/AHA) en mujeres colombianas con diabetes mellitus tipo dos y se observó además que la edad y el colesterol total fueron los valores que más afectaron la variación entre las escalas comparadas.

Abstract Introduction: Establishing cardiovascular risk (CVR) estimators that allow for equal concordance within the subset of the population is important for establishing therapy that provide advantages for each subpopulation. In this article we focus on buying CVR scale in women with type 2 diabetes mellitus. Objective: Compare between the Framingham, SCORE/REGICOR and ACC/AHA scales in a court of women with diabetes. Methods: The data collected were between 2014 and 2016 from the population of the Caribbean Endocrinological Center, Barranquilla, Colombia, considering the sociodemographic, anthropometric, and clinical variables. In this study, it was possible to establish comparisons between the Framingham, SCORE/REGICOR and ACC/AHA scales to identify cardiovascular risk levels in women with T2DM. Results: 100% of the sample (n = 107) were women with a mean age of 58.5 ± 13,646 years, 78 (72.9%) were classified as low risk, 23 (21.5%) intermediate and 6 ( 5.6%) high with the scale The SCORE/REGICOR scale showed 61 (57.0%) at low risk, 45 (42.1%) moderate and 1 (0.9%) high; while ACC / AHA 38 (35.5%) is classified as low risk and 69 (64.5%) as high. Conclusions: In the present study, a low concordance was observed when comparing the cardiac risk scales (Framingham, SCORE/REGICOR and ACC/AHA) in Colombian women with type two diabetes and it was also observed that age and total cholesterol were the values that more affected variation between the comparative cardiovascular risk scale.

El impacto de la educación en ciencias biológicas en pacientes con enfermedad renal en un contexto de epidemia por COVID-19 / The impact of education in biological science in patients with kidney disease in the context of a covid-19 epidemic

Resumen La educación en ciencias biológicas juega un papel importante a la hora de entender los sistemas vivos y ecosistemas que nos rodea en contexto de una epidemia de tipo zoonótico como SARS-CoV-2 y cumple un papel importante para el autocuidado en pacientes con enfermedad renal que son una población en alto riesgo según datos epidemiológicos. El presente trabajo pretende describir la asociación entre la educación en ciencia biológica y la epidemia por COVID-19. La educación en ciencias biológicas es un componente importante supeditado al autocuidado para que muchos pacientes con enfermedad renal puedan entender la importancia de tener una mejor adherencia al régimen terapéutico y el régimen alimenticio, y en el caso puntual de la epidemia por COVID-19 puede permitir que ellos tomen las medidas preventivas que eviten su exposición al patógeno.

Abstract Biologic education plays an important role in understanding the living systems and ecosystems that it does not surround in the context of a zoonotic-like epidemic such as SARS-CoV-2 may have an important role for self-care in patients with kidney disease that they are a population at high risk according to epidemiological data. That is why the present work aims to describe the association between education in biological science in patients with kidney disease in the context of a covid-19 epidemic. Biological science education is an important component subject to self-care so that many patients with kidney disease allowing them to understand, the importance of having a better adhere to the therapeutic regimen, dietary regimen and in the specific case of the epidemic by COVID-19 may allow them to take preventive measures to avoid their exposure to the pathogen.

Compromiso renal y digestivo en infecciones por COVID-19 / Renal and digestive engagement in COVID-19 infections

Resumen La infección por el síndrome respiratorio agudo severo (SARS-CoV-2) ha causado una de las emergencias epidemiológicas más grandes de los últimos 10 años y sus efectos patológicos son aún estudiados. Por lo anterior, resulta importante describir los mecanismos asociados al compromiso renal y digestivo en la infección por SARS-CoV-2. Los mecanismos patológicos en tejido renal y en intestino causados por la infección por SARS-CoV-2 son propios del tropismo viral por células de estos sistemas y de los mecanismos citopáticos de etapa lítica de la infección, con una liberación continua de viriones que favorece la generación de un entorno inflamatorio con la consecuente secreción descontrolada de citoquinas proinflamatorias que conducen a la infección entérica del intestino y a las alteraciones en el riñón.

Abstract Infection with Severe Acute Respiratory Syndrome (SARS-CoV-2) has caused one of the largest epidemiological emergencies in the last 10 years and its pathological effects are still studied. Due to the aforementioned, it is important to describe the mechanisms associated with renal and digestive compromise in SARS-CoV-2 infection. The pathological mechanisms in kidney tissue and in the intestine caused by SARS-CoV-2 infection are characteristic of the viral tropism by cells of these systems and of the lymphocytic mechanisms of the lytic stage of the infection, with a continuous release of virions that favors the generation of an inflammatory environment with the consequent uncontrolled secretion of proinflammatory cytokines that lead to enteric infection of the intestine and alterations in the kidney.

Reporte de cuatro casos COVID-19 hospitalizados en unidad de cuidados intensivos en una institución hospitalaria en Barranquilla, Colombia / Original article: Case-Serie of 4 COVID-19 patients hospitalized in an intensive care unit in a hospital institution in Barranquilla, Colombia

Resumen Presentar una serie de casos de COVID-19 con requerimiento de ingreso a Unidad de Cuidados Intensivos. La información fue tomada de las historias clínicas, y su evaluación y diagnóstico fue realizado mediante estudios paraclínicos en sangre, orina, PCR e imágenes diagnósticas en 4 pacientes con diferentes comorbilidades y nexo epidemiológico presente para desarrollo de la enfermedad. Los cuatro casos fueron manejados con cloroquina 300 mg vía oral, cada 12 horas, y azitromicina 1 gr vía oral, cada 24 horas, durante 5 días, sin complicaciones ni toxicidad asociada. El caso 1 desarrolló falla orgánica múltiple, incluyendo injuria renal aguda con una estancia en UCI de 4 días antes de su fallecimiento, mientras los casos 2, 3 y 4 tuvieron una evolución favorable y fueron dados de alta de UCI. Se requieren estudios multicéntricos rápidos que orienten científicamente hacia un mejor abordaje diagnóstico y manejo, en el contexto de una enfermedad con un comportamiento clínico-epidemiológico que debe estudiarse en profundidad y que probablemente cobrará muchas vidas; además, debido a la ausencia de pruebas diagnósticas rápidas, la utilización de una clasificación basada en la severidad de lesiones radiológicas llamada CO-RADS (Covid-19 Imaging Reporting and Data System) podría ser de gran importancia para instalar de manera temprana los tratamientos farmacológicos disponibles y la asistencia respiratoria mecánica precoz.

Abstract To present a COVID-19 case series with clinical admission criteria to Intensive Care Unit. Patients information was obtained from medical records, and daily clinical evaluation whereas diagnosis was carried out through paraclinical studies in blood, urine, PCR and diagnostic images in 4 patients with different comorbidities and epidemiological link for the development of COVID-19. All four cases were managed with chloroquine 300 mg orally every 12 hours and azithromycin orally every 24 hours for 5 days without complications or associated toxicity. The case 1 developed multiple organ failure, including acute kidney injury with an ICU stay of 4 days before his death, while cases 2, 3 and 4 had a favorable evolution and were discharged from the ICU. Rapid multicenter studies are required to scientifically guide a better diagnostic and management approach, in the context of a disease with a clinical-epidemiological behavior that must be studied in depth and will probably take many lives. In addition, due to the absence of sufficiently rapid tests, the use of a classification based on the severity of radiological lesions called CO-RADS (Covid-19 Imaging Reporting and Data System) could be of great importance to install available pharmacological treatments early and early mechanical respiratory support.

Moral structuring of children during the process of obtaining informed consent in clinical and research settings.

BACKGROUND: Informed consent is an important factor in a child's moral structure from which different types of doctor-patient relationships arise. Children's autonomy is currently under discussion in terms of their decent treatment, beyond what doctors and researchers perceive. To describe the influential practices that exist among clinicians and researchers toward children with chronic diseases during the process of obtaining informed consent. METHODS: This was a cross-sectional, qualitative study via a subjective and interpretivist approach. The study was performed by conducting semi-structured interviews of 21 clinicians and researchers. Data analysis was performed using the SPSS version 21® and Atlas Ti version 7.0® programs. RESULTS: The deliberative and paternalistic models were influential practices in the physician-patient relationship. In the deliberative model, the child is expected to have a moral awareness of their care. The paternalistic model determined that submission was a way of structuring the child because he or she is considered to be a subject of extreme care. CONCLUSIONS: The differentiated objectification [educational] process recognizes the internal and external elements of the child. Informed consent proved to be an appropriate means for strengthening moral and structuring the child.

Epidemiology and Toxicology of Ciguatera Poisoning in the Colombian Caribbean.

Ciguatera is a food intoxication caused by the consumption of primarily coral fish; these species exist in large numbers in the seas that surround the Colombian territory. The underreported diagnosis of this clinical entity has been widely highlighted due to multiple factors, such as, among others, ignorance by the primary care practitioner consulted for this condition as well as clinical similarity to secondary gastroenteric symptoms and common food poisonings of bacterial, parasitic or viral etiology. Eventually, it was found that people affected by ciguatoxins had trips to coastal areas hours before the onset of symptoms. Thanks to multiple studies over the years, it has been possible to identify the relation between toxigenic dinoflagellates and seagrasses, as well as its incorporation into the food chain, starting by fish primarily inhabiting reef ecosystems and culminating in the intake of these by humans. Identifying the epidemiological link, its cardinal symptoms and affected systems, such as gastrointestinal, the peripheral nervous system and, fortunately with a low frequency, the cardiovascular system, leads to a purely clinical diagnostic impression without necessitating further complementary studies; in addition, what would also help fight ciguatera poisoning is performing an adequate treatment of the symptoms right from the start, without underestimating or overlooking any associated complications.

Epigenetic Mechanisms and Posttranslational Modifications in Systemic Lupus Erythematosus.

The complex physiology of eukaryotic cells is regulated through numerous mechanisms, including epigenetic changes and posttranslational modifications. The wide-ranging diversity of these mechanisms constitutes a way of dynamic regulation of the functionality of proteins, their activity, and their subcellular localization as well as modulation of the differential expression of genes in response to external and internal stimuli that allow an organism to respond or adapt to accordingly. However, alterations in these mechanisms have been evidenced in several autoimmune diseases, including systemic lupus erythematosus (SLE). The present review aims to provide an approach to the current knowledge of the implications of these mechanisms in SLE pathophysiology.

Integrated analysis of microRNA regulation and its interaction with mechanisms of epigenetic regulation in the etiology of systemic lupus erythematosus.

The aim of this study was to identity in silico the relationships among microRNAs (miRNAs) and genes encoding transcription factors, ubiquitylation, DNA methylation, and histone modifications in systemic lupus erythematosus (SLE). To identify miRNA dysregulation in SLE, we used miR2Disease and PhenomiR for information about miRNAs exhibiting differential regulation in disease and other biological processes, and HMDD for information about experimentally supported human miRNA-disease association data from genetics, epigenetics, circulating miRNAs, and miRNA-target interactions. This information was incorporated into the miRNA analysis. High-throughput sequencing revealed circulating miRNAs associated with kidney damage in patients with SLE. As the main finding of our in silico analysis of miRNAs differentially expressed in SLE and their interactions with disease-susceptibility genes, post-translational modifications, and transcription factors; we highlight 226 miRNAs associated with genes and processes. Moreover, we highlight that alterations of miRNAs such as hsa-miR-30a-5p, hsa-miR-16-5p, hsa-miR-142-5p, and hsa-miR-324-3p are most commonly associated with post-translational modifications. In addition, altered miRNAs that are most frequently associated with susceptibility-related genes are hsa-miR-16-5p, hsa-miR-374a-5p, hsa-miR-34a-5p, hsa-miR-31-5p, and hsa-miR-1-3p.

Cell Signaling in Neuronal Stem Cells.

The defining characteristic of neural stem cells (NSCs) is their ability to multiply through symmetric divisions and proliferation, and differentiation by asymmetric divisions, thus giving rise to different types of cells of the central nervous system (CNS). A strict temporal space control of the NSC differentiation is necessary, because its alterations are associated with neurological dysfunctions and, in some cases, death. This work reviews the current state of the molecular mechanisms that regulate the transcription in NSCs, organized according to whether the origin of the stimulus that triggers the molecular cascade in the CNS is internal (intrinsic factors) or whether it is the result of the microenvironment that surrounds the CNS (extrinsic factors).

Neurogénesis en cerebro adulto / Neurogenesis in adult brain

Resumen Las lesiones cerebrales de cualquier etiología, incluyendo traumatismos, enfermedades neurodegenerativas o accidentes cerebrovasculares, suponen alteraciones irreversibles en la función cognitiva, el sistema motor y somato sensorial, e incluso de personalidad. En la actualidad no existen tratamientos eficientes, por tanto, la búsqueda de opciones terapéuticas para aumentar la tasa de reemplazo neuronal en el sistema nervioso central es uno de las líneas de investigación más activas en la neurociencia actual. En este sentido, el descubrimiento de la reposición neuronal a partir de células madre neurales (NSC) en el sistema nervioso central (SNC) adulto ha supuesto un nuevo enfoque en el desarrollo de terapias para este tipo de lesiones cerebrales. El descubrimiento de células madre neurales (NSC) en el cerebro adulto, abrió la posibilidad del desarrollo de nuevas terapias neurorregenerativas basadas en la reposición neuronal a partir de NSC (neurogénesis). En condiciones fisiológicas, existe neurogénesis a partir de NSC en dos zonas del cerebro adulto: el hipocampo y la zona subventricular (SVZ), mientras que en el resto del cerebro adulto no existe neurogenesis o es escasa. Sin embargo, cuando hay una lesión cerebral, estas NSC son reclutadas en el perímetro donde se produjo y se puede ver como proliferan células con características de precursores neurales (NPC). En esta publicación se hace una revisión exhaustiva de los conocimientos actuales sobre la neurogénesis en cerebro adulto.

Abstract Brain injuries of any etiology including traumatic injuries, neurodegenerative diseases or strokes are very common and involve irreversible impairments in cognitive function, motor and somatosensory system, and even personality. These types of lesions lack effective curative treatments, with the search for therapeutic options being one of the most active fields of research in current neuroscience. In this sense, the discovery of neural replenishment from neural stem cells (NSC) in the adult central nervous system (CNS) has been a new approach in the development of therapies for this type of brain injury. The discovery of neural stem cells (NSCs) in the adult brain has opened up the possibility of developing new neuroregenerative therapies based on neural replenishment from neural stem cells (neurogenesis). In physiological conditions, neurogenesis exists from NSC only in two areas of the adult brain, the hippocampus and the subventricular zone (SVZ), whereas in the rest of the adult brain there is no or little neurogenesis. However, when a brain injury occurs, these NSCs are recruited into the perimeter of the lesion and cells with proliferating neural precursor (NPC) characteristics can be seen. The publication provides a comprehensive review of current knowledge on neurogenesis in adult brain.

Análisis y predición de epitopes T y B en proteínas de Helicobacter pylori: Una aproximación inicial al diseño racional de estrategias terapeuticas alternativas sin uso de antibióticos / Analysis and prediction of T and B epitopes in Helicobacter pylori proteins: An initial approach to the rational design of alternative therapeutic strategies without the use of antibiotics

Resumen Helicobacter pylori (H. pylori) es un bacteria deforma espiral gram negativa que se estima afecta a más de la mitad de la población mundial, estableciendo una infección crónica en el estómago, debido a diversos mecanismos de evasión de la respuesta inmune. Este microorganismo se ha asociado con diversos trastornos gástricos que van desde gastritis hasta cáncer, por lo que es reconocido por la Organización Mundial de la Salud (OMS) como carcinógeno clase I. Regímenes de tratamiento convencionales involucran el uso de antibióticos, y estos fracasan cada vez más en el control de la infección, debido a que H. pylori ha adquirido de forma progresiva resistencia a los compuestos utilizados, lo cual sugiere la necesidad de desarrollar nuevas estrategias terapéuticas, lo cual implica la identificación de nuevos blancos terapéuticos. Este estudio tuvo como propósito la evaluación in silico de epitopes T y B en proteínas del Helicobacter pylori. Para ello fueron identificadas 22 proteínas de membrana externas de Helicobacter pylori Cepa 26695 con número de acceso NC_000915; en la selección se empleó la herramienta web Vaxign (disponible gratis enhttp://www.violinet.org/vaxign/), en las que se predijeron 100 epítopes (60 epítopes clases I y 40 epítopes clase II), que potencialmente podrían se utilizados en el desarrollo de nuevos abordajes terapéuticos de la infección por H. pylori sin uso de antibióticos.

Abstract Helicobacter pylori (H. pylori) is a gram-negative spiral bacterium, estimated to affect more than half the world population, establishing chronic infection in the stomach, due to diverse mechanisms of immune response evasion. This microorganism has been associated with various gastric disorders ranging from gastritis to cancer, and is recognized by the World Health Organization (WHO) as a class I carcinogen. Conventional treatment regimes involve the use of antibiotics and these fail every time but in the control of the infection, because H. pylori has progressively acquired resistance to the compounds used, suggesting the need to develop new therapeutic strategies, which implies the identification of new therapeutic targets. The present study aimed at the in silico evaluation of T and B epitopes in Helicobacter pylori proteins. For this, 22 external membrane proteins of Helicobacter pylori Strain 26695 with accession number NC_000915 were identified, in the selection the web tool Vaxign (was available free athttp://www.violinet.org/vaxign/), in which they were predicted 100 epitopes (60 class I epitopes and 40 class II epitopes), which could potentially be used in the development of new therapeutic approaches to H. pylori infection without the use of antibiotics.