Upregulated Nuclear Expression of Soluble Epoxide Hydrolase Predicts Poor Outcome in Breast Cancer Patients: Importance of the Digital Pathology Approach.

Breast cancer (BC) is the most common cancer in women, with incidence rates increasing globally in recent years. Therefore, it is important to find new molecules with prognostic and therapeutic value to improve therapeutic response and quality of life. The polyunsaturated fatty acids (PUFAs) metabolic pathway participates in various physiological processes, as well as in the development of malignancies. Although aberrancies in the PUFAs metabolic pathway have been implicated in carcinogenesis, the functional and clinical relevance of this pathway has not been well explored in BC. To evaluate the clinical significance of soluble epoxide hydrolase (EPHX2) expression in Mexican patients with BC using tissue microarrays (TMAs) and digital pathology (DP). Immunohistochemical analyses were performed on 11 TMAs with 267 BC samples to quantify this enzyme. Using DP, EPHX2 protein expression was evaluated solely in tumor areas. The association of EPHX2 with overall survival (OS) was detected through bioinformatic analysis in public databases and confirmed in our cohort via Cox regression analysis. Clear nuclear expression of EPHX2 was identified. Receiver operating characteristics (ROC) curves revealed the optimal cutoff point at 2.847062 × 10-3 pixels, with sensitivity of 69.2% and specificity of 67%. Stratification based on this cutoff value showed elevated EPHX2 expression in multiple clinicopathological features, including older age and nuclear grade, human epidermal growth factor receptor 2 (HER2) and triple negative breast cancer (TNBC) subtypes, and recurrence. Kaplan-Meier curves demonstrated how higher nuclear expression of EPHX2 predicts shorter OS. Consistently, multivariate analysis confirmed EPHX2 as an independent predictor of OS, with a hazard ratio (HR) of 3.483 and a 95% confidence interval of 1.804-6.724 (p < 0.001). Our study demonstrates for the first time that nuclear overexpression of EPHX2 is a predictor of poor prognosis in BC patients. The DP approach was instrumental in identifying this significant association. Our study provides valuable insights into the potential clinical utility of EPHX2 as a prognostic biomarker and therapeutic target in BC.

Association of triclosan and human infertility: A systematic review.

Triclosan (TCS) is a chemical compound, which has antibacterial, antiviral, and antifungal properties. TCS is considered an endocrine-disrupting chemical, which has been shown to interfere with developmental, behavioral, and reproductive outcomes in biological models and cell cultures. However, implications about exposure to TCS and human infertility are rare. Thus, the main of this review is summarize the available evidence of the association between triclosan exposure on human infertility. For this, systematic review was conducted following the recommendations established in Report of Systematic Reviews and Meta-Analyses guide (PRISMA). Initially, an electronic search in MEDLINE (via PubMed) and Science direct was performed. The methodological quality of the included studies was verified through the Joanna Briggs Institute (JBI) checklists. All selection and data extraction processes were carried out independently by two reviewers. The evidence was organized and presented using tables and narrative synthesis. There is lacking evidence about the association between triclosan and human infertility. Overall, no association between triclosan and infertility was found. However, semen quality and ovarian reserve are susceptible to triclosan exposure. Thus, future studies are still needed to better elucidate the associations between triclosan and infertility outcomes.

The Involvement of Polyunsaturated Fatty Acids in Apoptosis Mechanisms and Their Implications in Cancer.

Cancer is a significant global public health issue and, despite advancements in detection and treatment, the prognosis remains poor. Cancer is a complex disease characterized by various hallmarks, including dysregulation in apoptotic cell death pathways. Apoptosis is a programmed cell death process that efficiently eliminates damaged cells. Several studies have indicated the involvement of polyunsaturated fatty acids (PUFAs) in apoptosis, including omega-3 PUFAs such as alpha-linolenic acid, docosahexaenoic acid, and eicosapentaenoic acid. However, the role of omega-6 PUFAs, such as linoleic acid, gamma-linolenic acid, and arachidonic acid, in apoptosis is controversial, with some studies supporting their activation of apoptosis and others suggesting inhibition. These PUFAs are essential fatty acids, and Western populations today have a high consumption rate of omega-6 to omega-3 PUFAs. This review focuses on presenting the diverse molecular mechanisms evidence in both in vitro and in vivo models, to help clarify the controversial involvement of omega-3 and omega-6 PUFAs in apoptosis mechanisms in cancer.

Influencia de la musicoterapia en la disminución de cifras tensionales moderadamente altas

Fundamento la hipertensión arterial es una enfermedad con alta prevalencia a nivel mundial. Entre las alternativas para su tratamiento, la musicoterapia resulta eficaz junto al tratamiento farmacológico. Objetivo describir la influencia de la musicoterapia en la disminución de cifras tensionales moderadamente altas. Métodos se realizó un estudio observacional, analítico, de casos y controles, con pacientes (n=100) que acudieron al Cuerpo de guardia del Policlínico Rolando Ricardo Estrada, del municipio de Báguanos (Holguín), en el período 2021-2022, seleccionados mediante un muestreo no probabilístico intencional. Fueron creados dos grupos de 50 pacientes cada uno. El grupo de casos fue expuesto a la musicoterapia, no así el de control. Resultados en ambos grupos predominaron los pacientes con edades entre 40 y 59 años (41 %), del sexo femenino (55 %) y con diagnóstico previo de hipertensión arterial (58 %). En el momento de acudir al policlínico, en los dos grupos predominó la presión sistólica entre 140 y 159 mmHg (62 %). Luego de haber transcurrido una hora, en la mayoría de los pacientes del grupo de casos las cifras bajaron hasta 120 y 139 mmHg (32 %). En el grupo control se evidenció una leve disminución, pero se mantuvo mayor porcentaje de pacientes con 140 a 159 mmHg (25 %). Conclusión los pacientes expuestos a la musicoterapia evidenciaron una disminución más marcada de las cifras tensionales moderadamente elevadas, en comparación con los no expuestos.

Background arterial hypertension is a disease with a high prevalence worldwide. Among the alternatives for its treatment, music therapy is effective together with pharmacological treatment. Objective to describe the music therapy influence in the reduction of moderately high blood pressure figures. Methods an observational, analytical, case-control study was carried out with patients (n=100) who attended the Rolando Ricardo Estrada Polyclinic's Emergency Room, in the Báguanos municipality (Holguín), from 2021 to 2022, selected through purposive non- probabilistic sampling. Two groups of 50 patients each were created. The case group was exposed to music therapy, but not the control group. Results in both groups, patients aged between 40 and 59 years (41%), female (55%) and with a previous diagnosis of arterial hypertension (58%) predominated. At the time of going to the polyclinic, systolic pressure between 140 and 159 mmHg (62%) predominated in both groups. After one hour had elapsed, in most of the patients in the case group the figures dropped to 120 and 139 mmHg (32%). In the control group, a slight decrease was observed, but a higher percentage of patients with 140 to 159 mmHg (25%) remained. Conclusion patients exposed to music therapy showed a more marked decrease in moderately elevated blood pressure figures, compared to those not exposed.

Sustained COVID-19 community transmission and potential super spreading events at neglected afro-ecuadorian communities assessed by massive RT-qPCR and serological testing of community dwelling population.

Background: Neglected ethnic minorities from underserved rural populations in Latin America are highly vulnerable to coronavirus disease 2019 (COVID-19) due to poor health infrastructure and limited access to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) diagnosis. Esmeraldas is a mainly rural province of the Coastal Region of Ecuador characterized by a high presence of Afro-Ecuadorian population living under poverty conditions. Objective: We herein present a retrospective analysis of the surveillance SARS-CoV-2 testing in community-dwelling population from Esmeraldas carried out by our university laboratory in collaboration with regional health authorities during the first week of October 2020, in a region where no public SARS-CoV-2 detection laboratory was available at that time. Results: A total number of 1,259 people were tested for SARS-CoV-2 by Reverse Transcription quantitative Polimerasa Chain Reaction (RT-qPCR), resulting in an overall infection rate of 7.7% (97/1259, 95% CI: [6.32-9.35%]) for SARS-CoV-2, up to 12.1% in some communities. Interestingly, community-dwelling super spreaders with viral loads over 108 copies/ml represented 6.2% of the SARS-CoV-2-infected population. Furthermore, anti-SARS-CoV-2 IgG serological tests were applied to the same study group, yielding an overall seroprevalence of 11.68% (95% CI: [9.98-13.62%]) but as high as 24.47% at some communities. Conclusion: These results support active COVID-19 community transmission in Esmeraldas province during the first semester of the COVID-19 pandemic as it has been shown for other rural communities in the Ecuadorian Coastal Region.

Amputación digital en una paciente con úlcera del pie diabético / Digital amputation in a patient with diabetic foot ulcer

Este artículo consta solo de imágenes(AU)

Omega-6 Polyunsaturated Fatty Acids Enhance Tumor Aggressiveness in Experimental Lung Cancer Model: Important Role of Oxylipins.

Lung cancer is currently the leading cause of cancer death worldwide; it is often diagnosed at an advanced stage and bears poor prognosis. It has been shown that diet is an important environmental factor that contributes to the risk and mortality of several types of cancers. Intake of ω-3 and ω-6 PUFAs plays an important role in cancer risk and progression. Current Western populations have high consumption of ω-6 PUFAs with a ratio of ω-6/ω-3 PUFAs at 15:1 to 16.7:1 This high consumption of ω-6 PUFAs is related to increased cancer risk and progression. However, whether a diet rich in ω-6 PUFAs can contribute to tumor aggressiveness has not been well investigated. We used a murine model of pulmonary squamous cell carcinoma to study the aggressiveness of tumors in mice fed with a diet rich in ω-6 PUFAs and its relationship with oxylipins. Our results shown that the mice fed a diet rich in ω-6 showed a marked increase in proliferation, angiogenesis and pro-inflammatory markers and decreased expression of pro-apoptotic proteins in their tumors. Oxylipin profiling revealed an upregulation of various pro-tumoral oxylipins including PGs, HETEs, DiHETrEs and HODEs. These results demonstrate for the first time that high intake of ω-6 PUFAs in the diet enhances the malignancy of tumor cells by histological changes on tumor dedifferentiation and increases cell proliferation, angiogenesis, pro-inflammatory oxylipins and molecular aggressiveness targets such as NF-κB p65, YY1, COX-2 and TGF-ß.

Pénfigo vulgar / Pemphigus vulgaris

Imágenes(AU)

Optogenetic control of cancer cell survival in ChR2-transfected HeLa cells.

Optogenetics is a molecular biological technique involving transfection of cells with photosensitive proteins and the subsequent study of their biological effects. The aim of this study was to evaluate the effect of blue light on the survival of HeLa cells, transfected with channelrhodopsin-2 (ChR2). HeLa wild-type cells were transfected with a plasmid that contained the gene for ChR2. Transfection and channel function were evaluated by real-time polymerase chain reaction (RT-PCR), fluorescence imaging using green fluorescent protein (GFP) and flow cytometry for intracellular calcium changes using a Fura Red probe. We developed a platform for optogenetic stimulation for use within the cell culture incubator. Different stimulation procedures using blue light (467 nm) were applied for up to 24 h. Cell survival was determined by flow cytometry using propidium iodide and rhodamine probes. Change in cell survival showed a statistically significant (p < 0.05) inverse association with the frequency and time of application of the light stimulus. This change seemed to be associated with the ChR2 cis-trans-isomerization cycle. Cell death was associated with high concentrations of calcium in the cytoplasm and stimulation intervals less than the period of isomerization. It is possible to transfect HeLa cells with ChR2 and control their survival under blue light stimulation. We suggest that this practice should be considered in the future development of optogenetic systems in biological or biomedical research.

TRPV1-Estradiol Stereospecific Relationship Underlies Cell Survival in Oxidative Cell Death.

17ß-estradiol is a neuronal survival factor against oxidative stress that triggers its protective effect even in the absence of classical estrogen receptors. The polymodal transient receptor potential vanilloid subtype 1 (TRPV1) channel has been proposed as a steroid receptor implied in tissue protection against oxidative damage. We show here that TRPV1 is sufficient condition for 17ß-estradiol to enhance metabolic performance in injured cells. Specifically, in TRPV1 expressing cells, the application of 17ß-estradiol within the first 3 h avoided H2O2-dependent mitochondrial depolarization and the activation of caspase 3/7 protecting against the irreversible damage triggered by H2O2. Furthermore, 17ß-estradiol potentiates TRPV1 single channel activity associated with an increased open probability. This effect was not observed after the application of 17α-estradiol. We explored the TRPV1-Estrogen relationship also in primary culture of hippocampal-derived neurons and observed that 17ß-estradiol cell protection against H2O2-induced damage was independent of estrogen receptors pathway activation, membrane started and stereospecific. These results support the role of TRPV1 as a 17ß-estradiol-activated ionotropic membrane receptor coupling with mitochondrial function and cell survival.

Importance of the Role of ω-3 and ω-6 Polyunsaturated Fatty Acids in the Progression of Brain Cancer.

Brain cancer is one of the most malignant types of cancer in both children and adults. Brain cancer patients tend to have a poor prognosis and a high rate of mortality. Additionally, 20-40% of all other types of cancer can develop brain metastasis. Numerous pieces of evidence suggest that omega-3-polyunsaturated fatty acids (ω-PUFAs) could potentially be used in the prevention and therapy of several types of cancer. PUFAs and oxylipins are fundamental in preserving physiological events in the nervous system; it is, therefore, necessary to maintain a certain ratio of ω-3 to ω-6 for normal nervous system function. Alterations in PUFAs signaling are involved in the development of various pathologies of the nervous system, including cancer. It is well established that an omega-6-polyunsaturated fatty acid (ω-6 PUFA)-rich diet has a pro-tumoral effect, whereas the consumption of an ω-3 rich diet has an anti-tumoral effect. This review aims to offer a better understanding of brain cancer and PUFAs and to discuss the role and impact of PUFAs on the development of different types of brain cancer. Considering the difficulty of antitumor drugs in crossing the blood-brain barrier, the therapeutic role of ω-3/ω-6 PUFAs against brain cancer would be a good alternative to consider. We highlight our current understanding of the role of PUFAs and its metabolites (oxylipins) in different brain tumors, proliferation, apoptosis, invasion, angiogenesis, and immunosuppression by focusing on recent research in vitro and in vivo.

Correction to: Evaluation of growth and motility in non-photosynthetic Azospirillum brasilense exposed to red, blue, and white light.

In the original article, last name and first names of all the authors are inverted. The correct names should appears as "Romina Molina, Gastón López, Belén Rodríguez, Susana Rosas, Verónica Mora, Fabricio Cassán".

Health and Economic Impact of Health Warnings and Plain Tobacco Packaging in Seven Latin American Countries: Results of a Simulation Model.

INTRODUCTION: The burden of disease attributable to tobacco use in Latin America is very high. Our objective was to evaluate the 10-year potential impact of current legislation related to cigarette packaging and warnings and expected effects of moving to a higher level of strategies implementing cigarette plain packaging on health and cost outcomes in Argentina, Bolivia, Brazil, Chile, Colombia, Mexico, and Peru, using a microsimulation model. AIMS AND METHODS: We used a probabilistic state-transition microsimulation model, considering natural history, costs, and quality of life losses associated with main tobacco-related diseases. We followed up individuals in hypothetical cohorts and calculated health outcomes annually to obtain aggregated long-term population health outcomes and costs. We performed a literature review to estimate effects and analyzed studies and information from ministries, relevant organizations, and national surveys. We calibrated the model comparing the predicted disease-specific mortality rates with local statistics. RESULTS: Current graphic warnings already in place in each country could avert, during 10 years, 69 369 deaths and 638 295 disease events, adding 1.2 million years of healthy life and saving USD 5.3 billion in the seven countries. If these countries implemented plain packaging strategies, additional 155 857 premature deaths and 4 133 858 events could be averted, adding 4.1 million healthy years of life and saving USD 13.6 billion in direct health care expenses of diseases attributable to smoking. CONCLUSIONS: Latin American countries should not delay the implementation of this strategy that will alleviate part of the enormous health and financial burden that tobacco poses on their economies and health care systems. IMPLICATIONS: Tobacco smoking is the single most preventable and premature mortality cause in the world. The Framework Convention on Tobacco Control, supported by the World Health Organization, introduced a package of evidence-based measures for tobacco control. This study adds evidence on the potential health effects and savings of implementing cigarette plain packaging in countries representing almost 80% of the Latin American population; findings are valuable resources for policy makers in the region.

Factors associated with hindering the acceptance of HPV vaccination among caregivers - A cross-sectional study in Argentina.

BACKGROUND: The northeastern region of Argentina has the highest age-adjusted cervical cancer mortality rates. Given the strong link between HPV infections and cervical cancer, one of the main interventions is the population-based use of HPV vaccines. However, the acceptability is not very clear in low- and middle-income countries. The purpose of this study was to estimate the level of HPV vaccine acceptance and associated determinants among caregivers of girls in a northeastern city of Argentina. METHODS: A school-based survey was conducted in 2015 using a multistage sampling method. The primary sample unit were schools stratified by socioeconomic status selected at random, and caregivers of school girls were interviewed. The acceptability was determined using the adapted Theory of Planned Behavior. We performed logistic regression models to assess associated determinants. RESULTS: The study included 347 caregivers. The intention to vaccinate was 59.88%. A positive attitude of caregivers (aOR 4.67; 3.11-7.03) and positive influence of social norms (aOR 1.95; 1.03-3.70) were the main predictors independently associated to the intention to vaccinate against HPV. In contrast, practicing a Christian non-Catholic religion decreased the intention to vaccinate against HPV (OR 0.59; 0.36-0.95). All other factors evaluated were not significantly associated with intention to vaccinate against HPV. CONCLUSIONS: This study shows that evaluating attitudes, normative social beliefs, and perceived self-efficacy regarding HPV vaccination can be of utmost importance for mapping and planning of health-related strategies in developing countries.

Burden of smoking in Brazil and potential benefit of increasing taxes on cigarettes for the economy and for reducing morbidity and mortality. / Carga do tabagismo no Brasil e benefício potencial do aumento de impostos sobre os cigarros para a economia e para a redução de mortes e adoecimento.

The prevalence of smoking in Brazil has decreased considerably in recent decades, but the country still has a high burden of disease associated with this risk factor. The study aimed to estimate the burden of mortality, morbidity, and costs for society associated with smoking in 2015 and the potential impact on health outcomes and the economy based on price increases for cigarettes through taxes. Two models were developed: the first is a mathematical model based on a probabilistic microsimulation of thousands of individuals using hypothetical cohorts that considered the natural history, costs, and quality of life of these individuals. The second is a tax model applied to estimate the economic benefit and health outcomes in different price increase scenarios in 10 years. Smoking was responsible for 156,337 deaths, 4.2 million years of potential life lost, 229,071 acute myocardial infarctions, 59,509 strokes, and 77,500 cancer diagnoses. The total cost was BRL 56.9 billion (USD 14.7 billion), with 70% corresponding to the direct cost associated with healthcare and the rest to indirect cost due to lost productivity from premature death and disability. A 50% increase in cigarette prices would avoid 136,482 deaths, 507,451 cases of cardiovascular diseases, 64,382 cases of cancer, and 100,365 cases of stroke. The estimated economic benefit would be BRL 97.9 billion (USD 25.5 billion). In conclusion, the burden of disease and economic losses associated with smoking is high in Brazil, and tax increases are capable of averting deaths, illness, and costs to society.

A prevalência do tabagismo no Brasil reduziu sobremaneira nas últimas décadas, mas o país ainda tem uma elevada carga de doença associada a este fator de risco. O objetivo deste trabalho foi estimar a carga de mortalidade, morbidade e custos para a sociedade associada ao tabagismo em 2015 e o potencial impacto gerado em desfechos de saúde e para a economia a partir do aumento de preços dos cigarros por meio de impostos. Foram desenvolvidos dois modelos: o primeiro é um modelo matemático baseado em uma microssimulação probabilística de milhares de indivíduos usando-se coortes hipotéticas que considerou a história natural, custos e a qualidade de vida destes indivíduos. O segundo é um modelo de impostos aplicado para estimar o benefício econômico e em desfechos de saúde de diferentes cenários de aumento de preços em 10 anos. O tabagismo foi responsável por 156.337 mortes, 4,2 milhões de anos de vida perdidos, 229.071 infartos agudos do miocárdio, 59.509 acidentes vasculares cerebrais e 77.500 diagnósticos de câncer. O custo total foi de R$ 56,9 bilhões, dos quais 70% corresponderam ao custo direto associado à assistência à saúde e o restante ao custo indireto devido à perda de produtividade por morte prematura e incapacidade. Um aumento de 50% do preço do cigarro evitaria 136.482 mortes, 507.451 casos de doenças cardiovasculares, 64.382 de casos de câncer e 100.365 acidentes vasculares cerebrais. O benefício econômico estimado seria de R$ 97,9 bilhões. Concluiu-se que a carga da doença e econômica associada ao tabagismo é elevada no Brasil e o aumento de impostos é capaz de evitar mortes, adoecimento e custos para a sociedade.

La prevalencia del tabaquismo en Brasil se redujo sobremanera en las últimas décadas, pero el país todavía cuenta con una elevada carga de enfermedad asociada a este factor de riesgo. El objetivo de este trabajo fue estimar la carga de mortalidad, morbilidad y costes para la sociedad, asociada al tabaquismo en 2015, y el impacto potencial generado en los desenlaces de salud y para la economía a partir del aumento de precios del tabaco a través de impuestos. Se desarrollaron dos modelos: el primero es un modelo matemático, basado en una microsimulación probabilística de millares de individuos, a través de cohortes hipotéticas, que consideró la historia natural, costes y calidad de vida de esos individuos. El segundo se trata de un modelo de impuestos aplicado para estimar el beneficio económico y en desenlaces de salud de diferentes escenarios con el aumento de precios durante 10 años. El tabaquismo fue responsable de 156.337 muertes, 4,2 millones de años de vida perdidos, 229.071 infartos agudos de miocardio, 59.509 accidentes vasculares cerebrales y 77.500 diagnósticos de cáncer. El coste total fue de BRL 56,9 billones (USD 14,7 billones), de los cuales un 70% correspondieron al coste directo asociado a la asistencia a la salud y lo restante al coste indirecto, debido a la pérdida de productividad por muerte prematura e incapacidad. Un aumento de un 50% del precio del tabaco evitaría 136.482 muertes, 507.451 casos de enfermedades cardiovasculares, 64.382 de casos de cáncer y 100.365 accidentes vasculares cerebrales. El beneficio económico estimado sería de BRL 97,9 billones (USD 25,5 billones). Se concluyó que la carga de la enfermedad y económica asociada al tabaquismo es elevada en Brasil y el aumento de impuestos es capaz de evitar muertes, enfermedad y costes para la sociedad.

Carga do tabagismo no Brasil e benefício potencial do aumento de impostos sobre os cigarros para a economia e para a redução de mortes e adoecimento / Carga del tabaquismo en Brasil y beneficio potencial del aumento de impuestos sobre el tabaco para la economía y para la reducción de muertes por enfermedad / Burden of smoking in Brazil and potential benefit of increasing taxes on cigarettes for the economy and for reducing morbidity and mortality

A prevalência do tabagismo no Brasil reduziu sobremaneira nas últimas décadas, mas o país ainda tem uma elevada carga de doença associada a este fator de risco. O objetivo deste trabalho foi estimar a carga de mortalidade, morbidade e custos para a sociedade associada ao tabagismo em 2015 e o potencial impacto gerado em desfechos de saúde e para a economia a partir do aumento de preços dos cigarros por meio de impostos. Foram desenvolvidos dois modelos: o primeiro é um modelo matemático baseado em uma microssimulação probabilística de milhares de indivíduos usando-se coortes hipotéticas que considerou a história natural, custos e a qualidade de vida destes indivíduos. O segundo é um modelo de impostos aplicado para estimar o benefício econômico e em desfechos de saúde de diferentes cenários de aumento de preços em 10 anos. O tabagismo foi responsável por 156.337 mortes, 4,2 milhões de anos de vida perdidos, 229.071 infartos agudos do miocárdio, 59.509 acidentes vasculares cerebrais e 77.500 diagnósticos de câncer. O custo total foi de R$ 56,9 bilhões, dos quais 70% corresponderam ao custo direto associado à assistência à saúde e o restante ao custo indireto devido à perda de produtividade por morte prematura e incapacidade. Um aumento de 50% do preço do cigarro evitaria 136.482 mortes, 507.451 casos de doenças cardiovasculares, 64.382 de casos de câncer e 100.365 acidentes vasculares cerebrais. O benefício econômico estimado seria de R$ 97,9 bilhões. Concluiu-se que a carga da doença e econômica associada ao tabagismo é elevada no Brasil e o aumento de impostos é capaz de evitar mortes, adoecimento e custos para a sociedade.

La prevalencia del tabaquismo en Brasil se redujo sobremanera en las últimas décadas, pero el país todavía cuenta con una elevada carga de enfermedad asociada a este factor de riesgo. El objetivo de este trabajo fue estimar la carga de mortalidad, morbilidad y costes para la sociedad, asociada al tabaquismo en 2015, y el impacto potencial generado en los desenlaces de salud y para la economía a partir del aumento de precios del tabaco a través de impuestos. Se desarrollaron dos modelos: el primero es un modelo matemático, basado en una microsimulación probabilística de millares de individuos, a través de cohortes hipotéticas, que consideró la historia natural, costes y calidad de vida de esos individuos. El segundo se trata de un modelo de impuestos aplicado para estimar el beneficio económico y en desenlaces de salud de diferentes escenarios con el aumento de precios durante 10 años. El tabaquismo fue responsable de 156.337 muertes, 4,2 millones de años de vida perdidos, 229.071 infartos agudos de miocardio, 59.509 accidentes vasculares cerebrales y 77.500 diagnósticos de cáncer. El coste total fue de BRL 56,9 billones (USD 14,7 billones), de los cuales un 70% correspondieron al coste directo asociado a la asistencia a la salud y lo restante al coste indirecto, debido a la pérdida de productividad por muerte prematura e incapacidad. Un aumento de un 50% del precio del tabaco evitaría 136.482 muertes, 507.451 casos de enfermedades cardiovasculares, 64.382 de casos de cáncer y 100.365 accidentes vasculares cerebrales. El beneficio económico estimado sería de BRL 97,9 billones (USD 25,5 billones). Se concluyó que la carga de la enfermedad y económica asociada al tabaquismo es elevada en Brasil y el aumento de impuestos es capaz de evitar muertes, enfermedad y costes para la sociedad.

The prevalence of smoking in Brazil has decreased considerably in recent decades, but the country still has a high burden of disease associated with this risk factor. The study aimed to estimate the burden of mortality, morbidity, and costs for society associated with smoking in 2015 and the potential impact on health outcomes and the economy based on price increases for cigarettes through taxes. Two models were developed: the first is a mathematical model based on a probabilistic microsimulation of thousands of individuals using hypothetical cohorts that considered the natural history, costs, and quality of life of these individuals. The second is a tax model applied to estimate the economic benefit and health outcomes in different price increase scenarios in 10 years. Smoking was responsible for 156,337 deaths, 4.2 million years of potential life lost, 229,071 acute myocardial infarctions, 59,509 strokes, and 77,500 cancer diagnoses. The total cost was BRL 56.9 billion (USD 14.7 billion), with 70% corresponding to the direct cost associated with healthcare and the rest to indirect cost due to lost productivity from premature death and disability. A 50% increase in cigarette prices would avoid 136,482 deaths, 507,451 cases of cardiovascular diseases, 64,382 cases of cancer, and 100,365 cases of stroke. The estimated economic benefit would be BRL 97.9 billion (USD 25.5 billion). In conclusion, the burden of disease and economic losses associated with smoking is high in Brazil, and tax increases are capable of averting deaths, illness, and costs to society.

Carga de enfermedad atribuible al uso del tabaco en Paraguay y potencial impacto sanitario y económico del aumento del precio a través de impuestos / Burden of disease attributable to tobacco use in Paraguay, and potential health and financial impact of increasing prices through taxing

RESUMEN Objetivos. Estimar la carga de enfermedad asociada al consumo de tabaco en Paraguay y evaluar el potencial efecto económico y sanitario del aumento de precio mediante impuestos. Materiales y métodos. Se diseñó un modelo de microsimulación de Monte Carlo que incorporó la historia natural, costos y calidad de vida de enfermedades asociadas al tabaquismo para el 2015. Asimismo, se estimó el impacto en varios escenarios de aumento de impuestos sobre la prevalencia de tabaquismo y la recaudación fiscal. Resultados. 3354 personas mueren al año en Paraguay por consecuencia del tabaquismo. El 19 % de las muertes son por enfermedad isquémica cardíaca, el 15 % por accidentes cerebrovasculares. El 77 % de las muertes por enfermedad pulmonar obstructiva crónica y el 83 % de cáncer de pulmón son atribuibles al tabaquismo. Estas enfermedades en Paraguay representan un costo médico directo anual de más de 1,5 x 106 millones de guaraníes, mientras la recaudación impositiva por la venta de cigarrillos apenas llega a cubrir un 20 % de este gasto. Un aumento en el precio de los cigarrillos del 50 % vía impuestos, podría llevar a evitar 2507 muertes en diez años y generar recursos por 2,4 x 106 millones por ahorro en gastos sanitarios y aumento de recaudación. Conclusiones. El costo y la carga de enfermedad asociado al consumo de tabaco en el sistema de salud es elevado en Paraguay. Un aumento del precio de los cigarrillos a través de los impuestos tendría importantes beneficios sanitarios y podría compensar parcialmente los costos sanitarios.

ABSTRACT Objectives . To consider the burden of disease associated to tobacco consumption in Paraguay and to evaluate the potential economic and health effect of price increase through taxes. Materials and Methods . A Monte Carlo simulation model was designed incorporating natural history, costs, and quality of life of diseases associated to smoking for 2015. Also, several scenarios were considered for the impact of tax raises on the prevalence of smoking and fiscal collection. Results . In Paraguay, 3,354 people die every year as a consequence of smoking. Nineteen percent of deaths are due to cardiac ischemia, 15% due to stroke. 77% of deaths due to chronic obstructive pulmonary disease (COPD), and 83% of lung cancer can be attributed to smoking. These diseases in Paraguay represent an annual direct medical cost of more than 1.5 trillion PYG, while the tax collection from cigarette sales barely covers 20% of this expense. A 50% increase in the price of cigarettes via taxes could avoid 2507 deaths in ten years and generate resources by 2.4 trillion in savings in health expenses and tax of collection. Conclusions . The cost and the burden of disease associated to tobacco consumption is high in the health system in Paraguay. An increase in cigarette price through taxes could have significant health benefits and could offset health costs in part.

Dual role of hypoxia-inducible factor 1 α in experimental pulmonary tuberculosis: its implication as a new therapeutic target.

AIM: Investigate the role of hypoxia-inducible factor-1α (HIF-1α) in pulmonary tuberculosis (TB). METHODS & RESULTS: A model of progressive pulmonary TB in BALB/c mice, immunohistochemistry and digital pathology were used. High HIF-1α expression was observed during early TB in activated macrophages. During late TB, even higher HIF-1α expression was observed in foamy macrophages, which are resistant to apoptosis. Blocking HIF-1α during early infection with 2-methoxyestradiol worsened the disease, while during late TB, it induced macrophage apoptosis and decreased bacillary loads. CONCLUSION: HIF-1α has a dual role in experimental TB. This finding could have therapeutic implications because combined treatment with 2-methoxyestradiol and antibiotics appeared to eliminate mycobacteria more efficiently than conventional chemotherapy during advanced disease.

Transient Receptor Potential Vanilloid 1 Expression Mediates Capsaicin-Induced Cell Death.

The transient receptor potential (TRP) ion channel family consists of a broad variety of non-selective cation channels that integrate environmental physicochemical signals for dynamic homeostatic control. Involved in a variety of cellular physiological processes, TRP channels are fundamental to the control of the cell life cycle. TRP channels from the vanilloid (TRPV) family have been directly implicated in cell death. TRPV1 is activated by pain-inducing stimuli, including inflammatory endovanilloids and pungent exovanilloids, such as capsaicin (CAP). TRPV1 activation by high doses of CAP (>10 µM) leads to necrosis, but also exhibits apoptotic characteristics. However, CAP dose-response studies are lacking in order to determine whether CAP-induced cell death occurs preferentially via necrosis or apoptosis. In addition, it is not known whether cytosolic Ca2+ and mitochondrial dysfunction participates in CAP-induced TRPV1-mediated cell death. By using TRPV1-transfected HeLa cells, we investigated the underlying mechanisms involved in CAP-induced TRPV1-mediated cell death, the dependence of CAP dose, and the participation of mitochondrial dysfunction and cytosolic Ca2+ increase. Together, our results contribute to elucidate the pathophysiological steps that follow after TRPV1 stimulation with CAP. Low concentrations of CAP (1 µM) induce cell death by a mechanism involving a TRPV1-mediated rapid and transient intracellular Ca2+ increase that stimulates plasma membrane depolarization, thereby compromising plasma membrane integrity and ultimately leading to cell death. Meanwhile, higher doses of CAP induce cell death via a TRPV1-independent mechanism, involving a slow and persistent intracellular Ca2+ increase that induces mitochondrial dysfunction, plasma membrane depolarization, plasma membrane loss of integrity, and ultimately, cell death.

Tomografía por emisión de positrones (PET) en el seguimiento rutinario de neoplasias seleccionadas / Positron emission tomography (PET) in the routine monitoring of selected neoplasms

CONTEXTO CLÍNICO: En Argentina los tumores malignos representan la segunda causa de muerte, registrándose durante el año 2015 un total de 62.625 muertes por cáncer, constituyendo aproximadamente el 18% del total de los fallecimientos ocurridos. Los principales sitios tumorales responsables de la mayor mortalidad por cáncer en hombres durante el año 2014 en Argentina correspondieron a pulmón, colon, recto, y próstata. En las mujeres los principales sitios estuvieron representados por mama, pulmón, colon, recto y cuello uterino. La Tomografía por Emisión de Positrones (PET, del inglés "Positron Emission Tomography") es um método de imágenes utilizado, entre otras indicaciones, para la estadificación, re-estadificación y seguimiento de pacientes con sospecha de recurrencia y/o progresión tumoral. OBJETIVO: El objetivo del presente informe es evaluar la evidencia disponible acerca de la eficacia, seguridad y aspectos relacionados a las políticas de cobertura del uso del PET/TC para seguimiento de pacientes con cáncer de mama, pulmón, colorrectal, próstata y cuello uterino. MÉTODOS: Se realizó una búsqueda en las principales bases de datos bibliográficas, en buscadores genéricos de internet, y financiadores de salud. Se priorizó la inclusión de revisiones sistemáticas (RS), ensayos clínicos controlados aleatorizados (ECAs), evaluaciones de tecnologías sanitarias (ETS), evaluaciones económicas, guías de práctica clínica (GPC) y políticas de cobertura de diferentes sistemas de salud. RESULTADOS: No se encontró evidencia de alta calidad que evalúe el uso de la PET en el seguimiento de pacientes con cáncer que hayan completado el tratamiento primario con intención curativa y se encuentren asintomáticos. Se incluyeron 22 GPC, una evaluación económica, y 18 informes de políticas de cobertura del uso rutinario de la PET en el seguimiento de pacientes con cáncer que hayan completado el tratamento primario y se encuentren asintomáticos. CONCLUSIONES: No se encontró evidencia de buena calidad acerca del uso rutinario de la tomografía por emisión de positrones (PET) en el seguimiento de pacientes con cáncer (mama, pulmón, colorrectal, próstata o cuello uterino) que hayan completado el tratamiento primario con intención curativa y no presenten signos ni síntomas sugestivos de recurrencia o metástasis. Existe consenso entre las guías de práctica clínica o recomendaciones de expertos y financiadores públicos y privados, tanto de América Latina como de países de altos ingresos, en no contemplar el uso rutinario de la PET dentro de los estudios utilizados para el seguimiento de estos pacientes.