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Intracellular pathogens like Brucella face challenges during the intraphagocytic adaptation phase, where the modulation of gene expression plays an essential role in taking advantage of stressors to persist inside the host cell. This study aims to explore the expression of antisense virB2 RNA strand and related genes under intracellular simulation media. Sense and antisense virB2 RNA strands increased expression when nutrient deprivation and acidification were higher, being starvation more determinative. Meanwhile, bspB, one of the T4SS effector genes, exhibited the highest expression during the exposition to pH 4.5 and nutrient abundance. Based on RNA-seq analysis and RACE data, we constructed a regional map depicting the 5' and 3' ends of virB2 and the cis-encoded asRNA_0067. Without affecting the CDS or a possible autonomous RBS, we generate the deletion mutant ΔasRNA_0067, significantly reducing virB2 mRNA expression and survival rate. These results suggest that the antisense asRNA_0067 expression is promoted under exposure to the intraphagocytic adaptation phase stressors, and its deletion is associated with a lower transcription of the virB2 gene. Our findings illuminate the significance of these RNA strands in modulating the survival strategy of Brucella within the host and emphasize the role of nutrient deprivation in gene expression.
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Brucella abortus , Regulação Bacteriana da Expressão Gênica , Brucella abortus/genética , Brucella abortus/metabolismo , Proteínas de Bactérias/genética , Proteínas de Bactérias/metabolismo , RNA Bacteriano/genética , RNA Bacteriano/metabolismo , Transcrição Gênica , RNA Antissenso/genética , RNA Antissenso/metabolismo , Estresse Fisiológico , Animais , Macrófagos/microbiologiaRESUMO
BACKGROUND: Giant pituitary adenomas (GPAs) are defined as tumors with ≥40 mm in any maximum diameter, and these tend to invade multiple intracranial compartments. Hence, treatment remains a surgical challenge. OBJECTIVE: To describe the clinical and surgical outcomes of the endoscopic endonasal approach (EEA) for GPA in a pituitary referral center in Latin America and to analyze associated predictive factors. METHODS: 37 patients with histologically-confirmed GPA treated solely through the EEA between a 2-year period were included. Preoperative and postoperative clinical and neuroimaging findings; surgical morbidity and mortality; and binary logistic regression analysis to assess predictive factors were analyzed. RESULTS: Preoperative visual impairment prevalence was 97.3%. Mean tumor volume was 32 cc and gross total resection rate was 40.5%. Favorable visual acuity and visual fields outcome rate was 75% and 82.9%, respectively. In the multivariate analysis, bilateral cavernous sinus invasion (P = 0.018) and postoperative cerebrospinal fluid (CSF) leak (P = 0.036) were associated with an unfavorable visual acuity outcome, while radiation therapy (P = 0.035) was for visual fields. Similarly, intraoperative CSF leak was a predictive factor for postoperative CSF leak (10.8%) (P = 0.042) and vascular injury (13.5%) (P = 0.048). CONCLUSIONS: In this first Mexican clinical series, we demonstrated that the EEA is a safe and effective technique for GPA, although early diagnosis and prompt intervention may promote further visual function preservation without significant endocrine morbidity.
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Adenoma , Doenças da Hipófise , Neoplasias Hipofisárias , Humanos , Neoplasias Hipofisárias/diagnóstico por imagem , Neoplasias Hipofisárias/cirurgia , Neoplasias Hipofisárias/complicações , Adenoma/diagnóstico por imagem , Adenoma/cirurgia , Adenoma/complicações , Nariz/cirurgia , Complicações Pós-Operatórias/epidemiologia , Resultado do Tratamento , Estudos RetrospectivosRESUMO
As the human population grows, an increase in food trade is needed. This elevates the risk of epidemiological outbreaks. One of the prevalent pathogens associated with food production in Mexico has been Salmonella Oranienburg. Effective surveillance systems require microbial genetic knowledge. The objective of this work is to describe the genetic composition of Mexican S. Oranienburg genomes. For that, 53 strains from different environmental sources were isolated and sequenced. Additionally, 109 S. Oranienburg genomes were downloaded. Bioinformatic analyses were used to explore the clonal complex and genomic relatedness. A major clonal group formed by ST23 was identified comprising four STs. 202 SNPs were found the maximum difference among isolates. Virulence genes for host invasion and colonization as rpoS, fimbria type 1, and, T3SS were found common for all isolates. This study suggests that Mexican S. Oranienburg strains are potential pathogens circulating continuously in the region between host and non-host environments.
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Genômica , Humanos , MéxicoRESUMO
Los Institutos Nacionales de Salud (INS) miembros de la Red Regional Latinoamericana de la Asociación Internacional de Institutos Nacionales de Salud Pública, reunidos en forma presencial en la sede del Instituto Nacional de Salud Pública de México, en la Ciudad de Cuernavaca, los días 5 al 7 de octubre de 2022, contando con la participación de los directores o representantes de los INS de (...).
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Resumen Antecedentes: La enfermedad cardiovascular (ECV) es una causa importante de mortalidad, con implicaciones económicas para el sistema de salud. Objetivo: Caracterizar la carga de ECV en México de 1990 a 2021 con base en el estudio Global Burden of Disease (GBD), para abordar la carga de salud y enfermedad, sus implicaciones en la salud pública y el desarrollo del sistema de atención médica. Material y métodos: Se describe la mortalidad de las ECV en México y se examina en qué medida el crecimiento y el envejecimiento de la población explican las tendencias, las diferencias por sexo y los patrones geográficos. Resultados: Las ECV representan la primera causa de mortalidad, principalmente por cardiopatía hipertensiva, hemorragia intracerebral, hemorragia subaracnoidea, cardiopatía isquémica y accidente cerebrovascular isquémico. Se observó un cambio de tendencia en hombres y mujeres, mayor mortalidad en mayores de 80 años y en estados del norte del país. Conclusiones: México debe invertir en programas de salud pública para abordar los riesgos modificables, promover el envejecimiento saludable y reducir la muerte prematura por ECV.
Abstract Background: Cardiovascular disease (CVD) is a major cause of mortality, with economic implications for the health system. Objective: To characterize the burden of CVD in Mexico from 1990 to 2021 based on the Global Burden of Disease (GBD) study, to address the burden of health and disease, its implications for public health and for the development of the health care system. Material and methods: CVD mortality in Mexico is described, and the extent to which population growth and aging explain the observed trends, sex differences, and geographic patterns is examined. Results: CVD is the leading cause of mortality, mainly due to hypertensive heart disease, intracerebral hemorrhage, subarachnoid hemorrhage, ischemic heart disease and ischemic stroke. A change of trend was observed in men and women, with higher mortality in people older than 80 years and in the northern states of the country. Conclusions: Mexico must invest in public health programs to address modifiable risks, promote healthy aging, and reduce premature death due to CVD.
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RESUMEN Se realizó un estudio con el objetivo de identificar un ecosistema de endemismo urbano que explique la persistencia del SARS-CoV-2 durante los primeros 18 meses de la pandemia en el municipio de Petrópolis, Río de Janeiro, Brasil. Se analizaron los registros oficiales de casos mensuales de COVID-19, georreferenciados según el domicilio de residencia de cada caso confirmado y se elaboraron mapas de calor mensuales que identifican puntos con diferentes densidades espaciales de la enfermedad mediante la aplicación de la metodología de kernel. Se identificaron puntos de calor con cinco niveles de intensidad para la densidad espacial de casos. Los puntos de mayor intensidad, conocidos como «hotspots¼, se mantuvieron constantes durante todo el período en un polígono de aproximadamente 4 km2 ubicado en el centro de la ciudad de Petrópolis. En conclusión, se encontró que la mayor concentración de casos se mantuvo en la misma ubicación a lo largo del tiempo, a pesar de la dispersión esporádica de los casos en el territorio municipal.
ABSTRACT This study aimed to identify an ecosystem of urban endemism that explains the persistence of SARS-CoV-2 during the first 18 months of the pandemic in the municipality of Petrópolis, Rio de Janeiro, Brazil. We analyzed official records of monthly COVID-19 cases, georeferenced according to the residence address of each confirmed case. Monthly heat maps identifying points with different spatial densities of the disease were constructed by applying the kernel methodology. Heat spots with five intensity levels were identified for the spatial density of cases. The points of highest intensity, known as hotspots, remained constant throughout the period in a polygon of approximately 4 km2 located in the center of the city of Petrópolis. In conclusion, we found that the highest concentration of cases remained in the same location over time, despite the sporadic dispersion of cases within the municipal territory.
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Análise Espacial , Ecoepidemiologia , Hotspot de DoençaRESUMO
A major challenge in microbial ecology is to understand the principles and processes by which microbes associate and interact in community assemblages. Microbial communities in mountain glaciers are unique as first colonizers and nutrient enrichment drivers for downstream ecosystems. However, mountain glaciers have been distinctively sensitive to climate perturbations and have suffered a severe retreat over the past 40 years, compelling us to understand glacier ecosystems before their disappearance. This is the first study in an Andean glacier in Ecuador offering insights into the relationship of physicochemical variables and altitude on the diversity and structure of bacterial communities. Our study covered extreme Andean altitudes at the Cayambe Volcanic Complex, from 4,783 to 5,583 masl. Glacier soil and ice samples were used as the source for 16S rRNA gene amplicon libraries. We found (1) effects of altitude on diversity and community structure, (2) the presence of few significantly correlated nutrients to community structure, (3) sharp differences between glacier soil and glacier ice in diversity and community structure, where, as quantified by the Shannon γ-diversity distribution, the meta-community in glacier soil showed more diversity than in glacier ice; this pattern was related to the higher variability of the physicochemical distribution of variables in the former substrate, and (4) significantly abundant genera associated with either high or low altitudes that could serve as biomarkers for studies on climate change. Our results provide the first assessment of these unexplored communities, before their potential disappearance due to glacier retreat and climate change.
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OBJECTIVES.: Motivation for the study. During the COVID-19 pandemic, spatial analysis methodologies were used to identify the territorial determinants of its distribution and social inequalities in access to medical care. Main findings. We found a concentration of cases in a specific location of the municipality, which remained constant throughout the study period, with sporadic outbreaks in other areas. Implications. It is necessary to pay attention to possible endemic foci of viral diseases in urban settings and to take measures to eliminate them as well as to prevent their spread within and outside the area.
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COVID-19 , Viroses , Humanos , COVID-19/epidemiologia , Pandemias , Análise Espacial , Fatores SocioeconômicosRESUMO
Las enfermeras que laboran en el servicio de emergencia y cuidados críticos están expuestas a entornos estresantes siendo vulnerables al síndrome de desgaste profesional. El presente artículo describe las pautas para determinar la relación entre la resiliencia y el síndrome de desgaste profesional en enfermeras del área de servicios críticos del Instituto Nacional de Salud del Niño, Lima, 2019, cuya metodología consiste en el estudio observacional y transversal realizado en enfermeras que laboran en el área de servicios críticos. Se usaron los instrumentos Maslach Burnout Inventory y la Escala de Resiliencia de Wagnild y Young. Para el análisis estadístico, se utilizó el procedimiento de las ecuaciones estructurales SEM, por medio del ajuste de máxima verosimilitud, para lograr obtener las cargas factoriales entre las variables.
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Recursos HumanosRESUMO
INTRODUCTION: Pompe disease (PD) is a rare metabolic myopathy with an ample and heterogeneous clinical spectrum, particularly late onset PD (LOPD), which is characterized by appearance at older age and slower disease progression, leading to diagnostic confirmation difficulty and delay. AIM: To describe the genotype and clinical characteristics of Mexican patients with LOPD. MATERIAL AND METHODS: Clinical information from 19 Mexican patients with LOPD confirmed with enzyme activity and GAA gene analysis was reviewed. Genetic information of our population was crossed with international genetic databases. RESULTS: Median age between onset of symptoms and diagnosis was 19 years (range 2-43) and diagnostic confirmation 36 years (range 9-52). Most frequently referred symptoms were proximal axial weakness (n = 17; 89.5%), waddling gait (n = 17; 89.5%) and hyperlordosis (n = 7; 36.8%). Sixteen patients (84.2%) were evaluated with electromyography; a myopathic pattern was reported in 11 (57.8%), but only in 5 patients (26%) paraspinal muscle evaluation was included. The most pathogenic mutations in our group were c.-32-13T>G, c.1799G>A and c.1082C>T. CONCLUSIONS: Similar to other international publications, LOPD in Mexico is clinically heterogeneous; patients may delay years before diagnosis is established. Axial and proximal weakness is the most frequent clinical feature; thus, electromyography with paraspinal muscle evaluation is essential. Except for one, the mutations found in our patients have been previously reported in PD genetic databases.
TITLE: Enfermedad de Pompe de inicio tardío: análisis de una casuística de 19 pacientes mexicanos.Introducción. La enfermedad de Pompe es una miopatía metabólica rara con espectro clínico heterogéneo, especialmente la de inicio tardío, cuya sintomatología es de progresión más lenta y representa un gran reto diagnóstico. Objetivo. Describir el genotipo y las características clínicas de pacientes mexicanos con Pompe de inicio tardío (LOPD). Material y métodos. Se incluyó a 19 pacientes mexicanos con LOPD confirmada mediante actividad enzimática y estudio molecular del gen GAA. Se evaluaron datos clínicos y se revisaron las mutaciones en bases de datos genómicas. Resultados. La mediana de edad de inicio de los síntomas fue de 19 años (rango: 2-43 años), y la edad de diagnóstico, de 36 años (rango: 9-52 años). Los síntomas más frecuentes fueron debilidad axial y proximal (n = 17; 89,5%), marcha basculante (n = 17; 89,5%) e hiperlordosis (n = 7; 36,8%). A 16 pacientes (84,2%) se les realizó electromiografía; 11 (57,8%) describieron patrón miopático y sólo en cinco pacientes (26%) se incluyó la valoración de los músculos paraespinales. Las variantes patogénicas más frecuentes en nuestra casuística fueron c.-32-13T>G, c.1799G>A y c.1082C>T. Conclusiones. Parecido a lo comunicado en publicaciones internacionales, la LOPD en México es clínicamente heterogénea; los pacientes pueden tardar años en llegar al diagnóstico. La debilidad muscular axial y proximal es el dato clínico más frecuente, por lo que la electromiografía debe incluir valoración de los músculos paraespinales. A excepción de una, las mutaciones encontradas en nuestra serie de casos se encuentran previamente descritas en las bases de datos de enfermedad de Pompe.