Evaluation of the cytotoxicity and genotoxicity of glufosinate-ammonium at technical and commercial grades in HepG2 cells.

Exposure to genotoxic agents is associated with the development of cancer and related diseases. For this reason, assessing the genotoxicity of chemical compounds is necessary. In this line, information about the genotoxic effect of glufosinate-ammonium (GLA) has been reported only for the technical grade. However, humans are frequently exposed to commercial formulations of pesticides. Commercial formulations are characterized by using inner agents that increase toxicity compared to pesticides in technical grade. This study aimed to determine the cytotoxic and genotoxic effects of GLA on HepG2 cells. MTT and comet assays were performed to evaluate cell viability and DNA damage, respectively. HepG2 cells were exposed for 24 h to different concentrations of GLA (at 0.01 µg/mL; 0.04 µg/mL; 0.1 µg/mL; 0.24 µg/mL; 0.52 µg/mL; 1.25 µg/mL; 2.62 µg/mL and 13.12 µg/mL) in commercial- (Finale Ultra®) or technical-grade (GLAT). The results indicated that only Finale Ultra® induced a reduction in cell viability at 13.12 µg/mL. Furthermore, exposure to Finale Ultra® or GLAT was associated with increased DNA damage at concentrations from 0.52-13.12- µg/mL. This study shows the genotoxic effect of GLA on HepG2 cells.

Role of Long Non-Coding RNAs and the Molecular Mechanisms Involved in Insulin Resistance.

Long non-coding RNAs (lncRNAs) are single-stranded RNA biomolecules with a length of >200 nt, and they are currently considered to be master regulators of many pathological processes. Recent publications have shown that lncRNAs play important roles in the pathogenesis and progression of insulin resistance (IR) and glucose homeostasis by regulating inflammatory and lipogenic processes. lncRNAs regulate gene expression by binding to other non-coding RNAs, mRNAs, proteins, and DNA. In recent years, several mechanisms have been reported to explain the key roles of lncRNAs in the development of IR, including metastasis-associated lung adenocarcinoma transcript 1 (MALAT1), imprinted maternal-ly expressed transcript (H19), maternally expressed gene 3 (MEG3), myocardial infarction-associated transcript (MIAT), and steroid receptor RNA activator (SRA), HOX transcript antisense RNA (HOTAIR), and downregulated Expression-Related Hexose/Glucose Transport Enhancer (DREH). LncRNAs participate in the regulation of lipid and carbohydrate metabolism, the inflammatory process, and oxidative stress through different pathways, such as cyclic adenosine monophosphate/protein kinase A (cAMP/PKA), phosphatidylinositol 3-kinase/protein kinase B (PI3K/AKT), polypyrimidine tract-binding protein 1/element-binding transcription factor 1c (PTBP1/SREBP-1c), AKT/nitric oxide synthase (eNOS), AKT/forkhead box O1 (FoxO1), and tumor necrosis factor-alpha (TNF-α)/c-Jun-N-terminal kinases (JNK). On the other hand, the mechanisms linked to the molecular, cellular, and biochemical actions of lncRNAs vary according to the tissue, biological species, and the severity of IR. Therefore, it is essential to elucidate the role of lncRNAs in the insulin signaling pathway and glucose and lipid metabolism. This review analyzes the function and molecular mechanisms of lncRNAs involved in the development of IR.

Methamidophos induces cytotoxicity and oxidative stress in human peripheral blood mononuclear cells.

Previous studies have shown that organophosphate pesticide (OP) exposure is associated with oxidative stress. Methamidophos (MET) is an OP widely used in agriculture, which is regarded as a highly toxic pesticide and it is a potent inhibitor of acetylcholinesterase. The aim of this study was to evaluate whether MET can induce oxidative stress at low concentrations in primary cultures of human peripheral blood mononuclear cells (PBMCs). PBMCs from healthy individuals were exposed to MET (0-80 mg/L) for 0-72 h. We performed the MTT and neutral-red assays to assess the cytotoxicity. As indicators of oxidative stress, the levels of reactive oxygen species (ROS) were assessed using flow cytometry, and the malondialdehyde (MDA) and reduced glutathione (GSH) levels were determined. MET decreased the viability of PBMCs in a dose-dependent manner. At concentrations of 3, 10, or 20 mg/L for 24 h, MET increased the ROS production significantly compared with the vehicle control. Similarly, MET increased the levels of MDA at the same concentrations that increased ROS (10 and 20 mg/L); however, no changes in GSH levels were observed. These results suggest that MET increased the generation of oxidative stress in PBMCs. © 2015 Wiley Periodicals, Inc. Environ Toxicol 32: 147-155, 2017.

Trends on deaths from acute pesticide poisoning in Mexico, 2000-2021.

OBJETIVE: To provide a comprehensive analysis of mortality trends from acute pesticide poisoning in Mexico from 2000 through 2021. METHODS: The governmental records of deaths from acute pesticide poisoning were used. The age-standardized years of life lost and aged-standardized mortality rates were estimated. Significant changes in trends of annual percentage change were identified using Joinpoint regression. RESULTS: Between 2000 and 2021, mortality was primarily observed in individuals aged 15 to 19 years. Males were the most affected. Self-inflicted pesticide poisoning was the primary registered reason for death. The age-standardized mortality rate from acute pesticide poisoning was reduced from 2012 to 2021 (APC: -4.4; p=0.003). CONCLUSION: This report is the first study about the mortality rate from acute pesticide poisoning in Mexico. The results provided evidence to consider in developing laws to prevent acute pesticide poisoning.

[Foreign capital and structural change in the Brazilian private health services market]. / Capital estrangeiro e mudança estrutural no mercado privado de serviços de saúde brasileiro.

This article analyzes the process of structural transformation within the Brazilian private health services market since the 2000s, with emphasis on the growing participation of financial funds and foreign capital in the process of expansion and consolidation of the sector. The analysis of the movement of foreign capital into health services and plans in Brazil was developed from the construction of a database with a total of 297 equity operations involving companies with activities in health services, including companies operating health plans and insurance and companies administering health benefits. The analysis of these operations shows that the influx of foreign capital was fundamental to enable the centralization of capital in certain companies and catalyze the process of concentration and structural transformation of the health services sector over the last two decades. We concluded that the intensification of the intercapitalist dispute within the health services market led to the emergence of large corporations and new business models, with special emphasis on the emergence of verticalized care networks (operation of plans, hospital services, outpatient services, diagnosis and treatment, and primary care).

Este artigo analisa o processo de transformação estrutural no mercado privado de serviços de saúde brasileiro a partir dos anos 2000, com ênfase na crescente participação de fundos financeiros e do capital estrangeiro no processo de expansão e consolidação do setor. A análise do movimento de ingresso do capital estrangeiro nos serviços e planos de saúde no Brasil foi desenvolvida a partir da construção de uma base dados com um total de 297 operações patrimoniais envolvendo empresas com atividades em serviços de saúde, inclusive operadoras de planos e seguros de saúde e administradoras de benefícios em saúde. A análise dessas operações evidencia que o afluxo de capital estrangeiro foi fundamental para viabilizar a centralização de capital em determinadas empresas e catalisar o processo de concentração e transformação estrutural do setor de serviços de saúde ao longo das últimas duas décadas. Conclui-se que o acirramento da disputa intercapitalista no mercado de serviços de saúde levou à emergência de grandes corporações no mercado e a novos modelos de negócio, com destaque especial para o surgimento de redes verticalizadas de atendimento (operação de planos, serviços hospitalares, ambulatoriais, de diagnóstico e tratamento e de atenção básica).

Este artículo analiza el proceso de transformación estructural en el mercado privado de servicios de salud brasileño, a partir de los años 2000, con énfasis en la creciente participación de fondos financieros y del capital extranjero en el proceso de expansión y consolidación del sector. El análisis del movimiento de ingreso del capital extranjero en los servicios y planes de salud en Brasil fue desarrollado a partir de la construcción de una base datos con un total de 297 operaciones de capital de empresas con actividades en servicios de salud; inclusive las empresas operadoras de planes y seguros de salud y las empresas administradoras de beneficios en salud. El análisis de esas operaciones muestra que la entrada de capital extranjero fue fundamental para viabilizar la centralización de capital en determinadas empresas y catalizar el proceso de concentración y transformación estructural del sector de servicios de salud a lo largo de las últimas dos décadas. La conclusión que el recrudecimiento de la disputa intercapitalista dentro del mercado de servicios de salud llevó a la emergencia de grandes corporaciones en el mercado y nuevos modelos de negocio, con destaque especial para surgimiento de redes verticalizadas de atención (operación de planes, servicios hospitalarios, ambulatorios, de diagnóstico y tratamiento y de atención básica).

The burden of physical inactivity for the public health care system in Brazil.

OBJECTIVE: To update the estimated cost of physical inactivity for the Brazilian Unified Health System (SUS). METHODS: The hospitalization costs were accessed via a database of the Ministry of Health - Informatics Department of the Brazilian SUS. Physical inactivity for the year 2017 was accessed via the Sistema de Vigilância de Fatores de Risco e Proteção para Doenças Crônicas por Inquérito Telefônico (Vigitel - Surveillance System for Risk and Protective Factors for Chronic Diseases by Telephone Survey). Seven chronic non-communicable diseases (NCD) were selected via the international classification of disease (ICD-10). The population fraction attributable to physical inactivity was calculated based on relative risk reported in previous studies and the prevalence of physical inactivity. RESULTS: In 2017, the seven NCD considered in the analysis were responsible for 154,017 hospital admissions in adults older than 40 years old, residing in the state capitals and the Federal District, which corresponded to 6.5% of hospitalizations and 10.6% of SUS costs at an estimated US$ 112,524,914.47. Considering the group of individuals with insufficient physical activity in their leisure time, the percentage cost attributed to physical inactivity reached 17.4% of the estimated costs with NCD. At a national level, NCD were responsible for approximately 740 thousand hospitalizations, costing US$ 482 million, from which 17.4%, US$ 83 million were attributed to physical inactivity. CONCLUSION: This study provides evidence to conclude that physical inactivity exerts an economic impact on the SUS due to NCD hospitalization. Physical inactivity is a modifiable lifestyle and compelling evidence, including that of this article, supports the promotion of a more active community as one of the major targets of public health care policies.

ß-glucuronidase as a biomarker for assessing the exposure to anticholinergic pesticides: A meta-analysis.

INTRODUCTION: The human exposure to anticholinergic pesticides has been associated with the development of various diseases. Therefore, several biomarkers have been proposed for biomonitoring human exposure to anticholinergic pesticides. OBJECTIVE: This work evaluated the effect of human exposure to anticholinergic pesticides on ß-glucuronidase (GUSB) levels. METHODS: A systematic review was performed using PubMed, Web of Science, Scopus, and EBSCO databases up to December 2021. The statistical analysis employed standardized mean differences and meta-regression. And the trial sequential analysis was performed. RESULTS: Nine studies were included. A monotonic relationship was observed between poisoning severity and GUSB. Furthermore, BuChE levels were correlated with GUSB levels. CONCLUSIONS: The results indicated that GUSB levels could be used as a possible diagnosis biomarker in poisoning related to anticholinergic pesticide exposure. However, the use of GUSB to assess the chronic exposure to anticholinergic pesticides could be only performed in recent exposure (≈ 7 days after last exposure).

Diverse Cell Death Mechanisms Are Simultaneously Activated in Macrophages Infected by Virulent Mycobacterium tuberculosis.

Macrophages are necessary to eliminate pathogens. However, some pathogens have developed mechanisms to avoid the immune response. One of them is modulating the cell death mechanism to favor pathogen survival. In this study, we evaluated if virulent Mycobacterium tuberculosis (M. tb) can simultaneously activate more than one cell death mechanism. We infected human monocyte-derived macrophages (MDM) in vitro with avirulent (H37Ra) and virulent (H37Rv) strains, and then we measured molecules involved in apoptosis, necroptosis, and pyroptosis. Our data showed that H37Rv infection increased the BCL-2 transcript and protein, decreased the BAX transcript, and increased phosphorylated BCL-2 at the protein level. Moreover, H37Rv infection increased the expression of the molecules involved in the necroptotic pathway, such as ASK1, p-38, RIPK1, RIPK3, and caspase-8, while H37Ra increased caspase-8 and decreased RIPK3 at the transcriptional level. In addition, NLRP3 and CASP1 expression was increased at low MOI in both strains, while IL-1ß was independent of virulence but dependent on infection MOI, suggesting the activation of pyroptosis. These findings suggest that virulent M. tb inhibits the apoptosis mediated by BCL-2 family molecules but, at the same time, increases the expression of molecules involved in apoptosis, necroptosis, and pyroptosis at the transcriptional and protein levels, probably as a mechanism to avoid the immune response and guarantee its survival.

Effects of exposure to environmental pollutants on mitochondrial DNA copy number: a meta-analysis.

Exposure to environmental pollutants has been associated with alteration on relative levels of mitochondrial DNA copy number (mtDNAcn). However, the results obtained from epidemiological studies are inconsistent. This meta-analysis aimed to evaluate whether environmental pollutant exposure can modify the relative levels of mtDNAcn in humans. We performed a literature search using PubMed, Scopus, and Web of Science databases. We selected and reviewed original articles performed in humans that analyzed the relationship between environmental pollutant exposure and the relative levels of mtDNAcn; the selection of the included studies was based on inclusion and exclusion criteria. Only twenty-two studies fulfilled our inclusion criteria. A total of 6011 study participants were included in this systematic review and meta-analysis. We grouped the included studies into four main categories according to the type of environmental pollutant: (1) heavy metals, (2) polycyclic aromatic hydrocarbons (PAHs), (3) particulate matter (PM), and (4) cigarette smoking. Inconclusive results were observed in all categories; the pooled analysis shows a marginal increase of relative levels of mtDNAcn in response to environmental pollutant exposure. The trial sequential analysis and rate confidence in body evidence showed the need to perform new studies. Therefore, a large-scale cohort and mechanistic studies in this area are required to probe the possible use of relative levels of mtDNAcn as biomarkers linked to environmental pollution exposure.

Genetic variants in SLC22A1 are related to serum lipid levels in Mexican women.

Dyslipidemia is the main risk factor for coronary artery disease and is characterized by alterations in concentrations of lipids, including low-density lipoprotein cholesterol (LDL-c), high-density lipoprotein cholesterol (HDL-c), and triacylglycerols. The participation of several genes in the development of dyslipidemia has been evidenced. Genetic variants in SLC22A1 have been associated with elevated cholesterol and LDL-c levels. The aim of this study was to evaluate the association between single-nucleotide polymorphisms (SNPs) in the SLC22A1 gene with atherogenic risk lipid levels in Mexican women. Anthropometric and biochemical measurements were performed, and four SNPs in SLC22A1 were genotyped by real-time polymerase chain reaction. The Hardy-Weinberg equilibrium was verified, and haplotype frequencies were calculated. We found significant differences between the allele frequencies of the SNPs analyzed with those reported in Mexico and in the world, which could be due to differences in the historical admixture of the women studied. Generalized linear models were evaluated to determine the association between genotypes and haplotypes with lipids levels. We identified a significant increase in total cholesterol and LDL-c levels in women who were carriers of the GA and AG genotypes of the polymorphisms rs628031 and rs594709, respectively, significant effect that is also shown in a dominant inheritance model. Interestingly, we identified an important relationship of the AGC-GAT haplotype with the elevation in LDL-c levels and AGA-GAT haplotype with the elevation in HDL-c levels. On the other hand, we found a strong linkage disequilibrium between the polymorphisms studied. Our results show that variants in the SLC22A1 gene influence serum levels of atherogenic risk lipids, suggesting that these variants probably affect the function of organic cation transporter-1 and therefore, on the regulation of lipid metabolism.

In vitro Characterization of Anti-SARS-CoV-2 Intravenous Immunoglobulins (IVIg) Produced From Plasma of Donors Immunized With the BNT162b2 Vaccine and Its Comparison With a Similar Formulation Produced From Plasma of COVID-19 Convalescent Donors.

Despite vaccines are the main strategy to control the ongoing global COVID-19 pandemic, their effectiveness could not be enough for individuals with immunosuppression. In these cases, as well as in patients with moderate/severe COVID-19, passive immunization with anti-SARS-CoV-2 immunoglobulins could be a therapeutic alternative. We used caprylic acid precipitation to prepare a pilot-scale batch of anti-SARS-CoV-2 intravenous immunoglobulins (IVIg) from plasma of donors immunized with the BNT162b2 (Pfizer-BioNTech) anti-COVID-19 vaccine (VP-IVIg) and compared their in vitro efficacy and safety with those of a similar formulation produced from plasma of COVID-19 convalescent donors (CP-IVIg). Both formulations showed immunological, physicochemical, biochemical, and microbiological characteristics that meet the specifications of IVIg formulations. Moreover, the concentration of anti-RBD and ACE2-RBD neutralizing antibodies was higher in VP-IVIg than in CP-IVIg. In concordance, plaque reduction neutralization tests showed inhibitory concentrations of 0.03-0.09 g/L in VP-IVIg and of 0.06-0.13 in CP-IVIg. Thus, VP-IVIg has in vitro efficacy and safety profiles that justify their evaluation as therapeutic alternative for clinical cases of COVID-19. Precipitation with caprylic acid could be a simple, feasible, and affordable alternative to produce formulations of anti-SARS-CoV-2 IVIg to be used therapeutically or prophylactically to confront the COVID-19 pandemic in middle and low-income countries.

Influence of Diet and Levels of Zonulin, Lipopolysaccharide and C-Reactive Protein on Cardiometabolic Risk Factors in Young Subjects.

A western diet and increased intestinal permeability may contribute to systemic inflammation and the development of cardio-metabolic alterations. The aim of this study was to assess the relationship between diet, biomarkers of intestinal permeability, and chronic low-grade inflammation on the cardiometabolic profile. A cross-sectional study was carried out in 238 young subjects aged 18-29 years, divided into two groups: with <3 cardiometabolic risk factors (CRF) and ≥3 risk factors. Anthropometric parameters, biochemical profile, and serum levels of zonulin, lipopolysaccharide (LPS), and high-sensitivity C-reactive protein (hs-CRP) were measured, and the macronutrient intake was evaluated. Interaction models showed elevated glucose levels in the presence of high biomarker levels: zonulin ≥51.6 ng/mL plus LPS ≥ 1.35 EU/mL (ß = 1.1, p = 0.006), and LPS ≥1.35 EU/mL plus hs-CRP ≥ 4.3 mg/L (ß = 1.2, p = 0.007). In addition, triglyceride levels increased in the presence of LPS ≥ 1.35 EU/mL and hs-CRP ≥ 4.3 mg/L (ß = 3.9, p = 0.01). Despite having increased biomarker levels, a higher consumption of water (≥2100 mL), polyunsaturated fatty acids (≥6.0 g), or fiber (≥30 g) decreased triglyceride (ß = -9.6, p = 0.03), total cholesterol (ß = -5.1, p = 0.01), and LDL-C levels (ß = -7.7, p = 0.01). These findings suggest that the increased consumption of water, PUFA and fiber may improve lipid profile in subjects with intestinal permeability dysfunction or low-grade systemic inflammation.

Altered levels of MALAT1 and H19 derived from serum or serum exosomes associated with type-2 diabetes.

Environmental, genetic and epigenetic risk factors have been closely related to the development of type-2 diabetes (T2D). It has been reported that the expression in H19 and MALAT1 are related to metabolic diseases. To analyze the relationship between the expression of H19 and MALAT1 lncRNAs with diabetic patients. A study was conducted in subjects with T2D and nondiabetic controls, residents of Mexico City. Anthropometric measurements were made, and serum concentrations of glucose, glycosylated hemoglobin, total cholesterol, triglycerides, high- and low-density lipoprotein cholesterol were analyzed. Total RNA was extracted from serum and serum exosomes. The H19 and MALAT1 expression levels were quantified by RT-qPCR. A significant reduction in the expression of MALAT1 from serum or serum exosomes were found in patients with T2D, metabolic syndrome and low levels of HDL-c. Significant increase in H19 levels was found in diabetic subjects with poor glycemic control. Additionally, the principal component analyzes showed that serum MALAT1 expression was associated with total cholesterol and HDL-c levels, and the exosomes H19 expression was associated with waist circumference. The results obtained suggest that MALAT1 expression levels could be an epigenetic biomarker of diabetes risk or of its comorbidities.

Characterization of Huh7 cells after the induction of insulin resistance and post-treatment with metformin.

Liver-specific insulin resistance is associated with the development of the main challenges in metabolism, resulting in dyslipidemia, hyperinsulinemia and hyperglycemia. In vitro models developed for researching hepatic insulin resistance are limited and employed cell lines without similar characteristics to primary human hepatocytes. The Huh7 cell line has been established as a model with similar characteristics to primary human hepatocytes. In addition, it has been identified in the Huh7 cell line that infection with the hepatitis C virus induces insulin resistance. Therefore, we analyzed the induction of insulin resistance (IR) in the Huh7 cell line using an overdosage of insulin and treatment with metformin for its reversal, with the purpose of establishing an insulin resistance model useful for metabolic and pharmacological studies. Insulin-resistant Huh7 (Huh7-IR) showed a reduction in Glut2, glycogen levels, and glucose uptake stimulated by insulin or tyrosine phosphorylation from the ß-fraction of insulin receptor post-insulin stimulation, with an increase of glucose production and lipid intracellular content. These biomarkers are frequently observed in insulin-resistant hepatic cells. Moreover, treatment of Huh7-IR with 0.5, 1 or 2 mM of metformin by 24 h decreased the biomarkers associated with an insulin-resistant state. These results suggest that Huh7-IR could be used as an in vitro system to research hepatic insulin resistance in metabolic and pharmacological studies.

[Interchangeability of biological products in the Brazilian Unified National Health System (SUS): the main regulatory challenges]. / Intercambialidade de produtos biológicos no Sistema Único de Saúde (SUS): principais desafios regulatórios.

Biological products have sparked a worldwide therapeutic revolution. However, the high cost of these products threatens health systems' sustainability. The development of copies is considered an economic alternative, but due to the products' complexity, many concepts used in generic drugs do not apply. Interchangeability between biologicals poses a regulatory challenge. This essay discusses the main regulatory challenges for establishing criteria for interchangeability between new biologicals and their copies in the scope of the Brazilian Unified National Health System (SUS), considering the guidelines adopted by the world's main drug regulatory agencies concerning interchangeability and the prevailing Brazilian regulatory framework on this issue. Concerns related to the interchangeability of biologicals include automatic substitution, nomenclature, pharmacovigilance, immunogenicity, and extrapolation of therapeutic indications and clinical data from new biologicals to their copies. While the clinical success and economic benefits of switching from new biologicals to their biosimilars have already been observed, the heterogeneity between countries in the regulatory barriers to the approval of copies of biologicals should be taken into consideration during the regulation of interchangeability of biologicals in Brazil.

Produtos biológicos revolucionaram a terapêutica mundial. O alto custo desses medicamentos, no entanto, ameaça a sustentabilidade dos sistemas de saúde. O desenvolvimento de cópias é tido como uma alternativa econômica, mas devido à complexidade desses produtos, muitos conceitos utilizados para os medicamentos genéricos não se aplicam. A intercambialidade entre produtos biológicos representa um desafio regulatório a ser superado. Este ensaio discute os principais desafios regulatórios relacionados ao estabelecimento de critérios para intercambialidade entre produtos biológicos novos e suas cópias no âmbito do Sistema Único de Saúde (SUS), considerando as diretrizes adotadas pelas principais agências reguladoras de medicamentos do mundo sobre a intercambialidade e o arcabouço regulatório vigente no Brasil para esta questão. Preocupações relacionadas à intercambialidade de produtos biológicos incluem substituição automática, nomenclatura, farmacovigilância, imunogenicidade e extrapolação das indicações terapêuticas e dos dados clínicos de produtos biológicos novos para suas cópias. Embora o sucesso clínico e os benefícios econômicos da alternância entre alguns produtos biológicos novos e seus biossimilares já tenham sido observados, a heterogeneidade das barreiras regulatórias para aprovação das cópias de produtos biológicos entre diferentes países deve ser considerada para a regulamentação da intercambialidade de produtos biológicos no Brasil.

Los productos biológicos revolucionaron la terapéutica mundial. El alto coste de estos medicamentos, no obstante, amenaza la sostenibilidad de los sistemas de salud. El desarrollo de copias se considera como una alternativa económica, pero debido a la complejidad de estos productos, muchos conceptos utilizados para los medicamentos genéricos no se aplican a los mismos. La intercambiabilidad entre productos biológicos representa un desafío regulatorio que se debe superar. Este trabajo discute los principales desafíos regulatorios, relacionados con el establecimiento de criterios para la intercambiabilidad entre productos biológicos nuevos y sus copias en el ámbito del Sistema Único de Salud (SUS), considerando las directrices adoptadas por las principales agencias regulatorias de medicamentos del mundo sobre la intercambiabilidad y el armazón regulatorio vigente en Brasil para esta cuestión. Las preocupaciones relacionadas con la intercambiabilidad de productos biológicos incluyen la sustitución automática, nomenclatura, farmacovigilancia, inmunogenicidad y extrapolación de las indicaciones terapéuticas, así como de los datos clínicos de productos biológicos nuevos para sus copias. A pesar de que el éxito clínico y los beneficios económicos de la alternancia entre algunos productos biológicos nuevos y sus biosimilares, ya se han observados, la heterogeneidad de las barreras regulatorias para la aprobación de las copias de productos biológicos entre los diferentes países debe ser considerada para la regulación de la intercambiabilidad de productos biológicos en Brasil.

Trends on deaths from acute pesticide poisoning in Mexico, 2000-2021 / Tendências das mortes por intoxicação aguda por pesticidas no México, 2000-2021

ABSTRACT Objetive: To provide a comprehensive analysis of mortality trends from acute pesticide poisoning in Mexico from 2000 through 2021. Methods: The governmental records of deaths from acute pesticide poisoning were used. The age-standardized years of life lost and aged-standardized mortality rates were estimated. Significant changes in trends of annual percentage change were identified using Joinpoint regression. Results: Between 2000 and 2021, mortality was primarily observed in individuals aged 15 to 19 years. Males were the most affected. Self-inflicted pesticide poisoning was the primary registered reason for death. The age-standardized mortality rate from acute pesticide poisoning was reduced from 2012 to 2021 (APC: -4.4; p=0.003). Conclusion: This report is the first study about the mortality rate from acute pesticide poisoning in Mexico. The results provided evidence to consider in developing laws to prevent acute pesticide poisoning.

RESUMO Objetivo: Fornecer uma análise abrangente das tendências de mortalidade por envenenamento agudo por pesticidas no México de 2000 a 2021. Métodos: Foram usados os registros governamentais de mortes por envenenamento agudo por pesticidas. Foram estimados os anos de vida perdidos estandardizados por idade e as taxas de mortalidade estandardizados por idade. Modificações significativas nas tendências de variação percentual anual foram identificadas usando a regressão Joinpoint. Resultados: Entre 2000 e 2021, a mortalidade foi observada principalmente em indivíduos na faixa etária de 15 a 19 anos. Os homens foram os mais afetados. O envenenamento por pesticida autoinfligido foi o principal motivo de morte registrado. A taxa de mortalidade estandardizada por idade por intoxicação aguda por pesticidas foi reduzida de 2012 a 2021 (Annual Percent Change — APC: -4,4; p=0,003). Conclusão: Este relatório é o primeiro estudo sobre a taxa de mortalidade por intoxicação aguda por pesticidas no México. Os resultados forneceram evidências a serem consideradas no desenvolvimento de leis para prevenir o envenenamento agudo por pesticidas.

Improving atmospheric correction for highly productive coastal waters using the short wave infrared retrieval algorithm with water-leaving reflectance constraints at 412 nm.

The recently developed short wave infrared (SWIR) atmospheric correction algorithm for ocean color retrieval uses long wavelength channels to retrieve atmospheric parameters to avoid bright pixel contamination. However, this retrieval is highly sensitive to errors in the aerosol model, which is magnified by the higher variability of aerosols observed over urban coastal areas. While adding extra regional aerosol models into the retrieval lookup tables would tend to increase retrieval error since these models are hard to distinguish in the IR, we explore the possibility that for highly productive waters with high colored dissolved organic matter, an estimate of the 412 nm channel water-leaving reflectance can be used to constrain the aerosol model retrieval and improve the water-leaving reflectance retrieval. Simulations show that this constraint is particularly useful where aerosol diversity is significant. To assess this algorithm we compare our retrievals with the operational SeaWiFS Data Analysis System (SeaDAS) SWIR and near infrared retrievals using in situ validation data in the Chesapeake Bay and show that, especially for absorbing aerosols, significant improvement is obtained. Further insight is also obtained by the intercomparison of retrieved remote sensing reflectance images at 443 and 551 nm, which demonstrates the removal of anomalous artifacts in the operational SeaDAS retrieval.

Capital estrangeiro e mudança estrutural no mercado privado de serviços de saúde brasileiro / Foreign capital and structural change in the Brazilian private health services market / Capital extranjero y cambio estructural en el mercado privado de servicios de salud brasileño

Resumo: Este artigo analisa o processo de transformação estrutural no mercado privado de serviços de saúde brasileiro a partir dos anos 2000, com ênfase na crescente participação de fundos financeiros e do capital estrangeiro no processo de expansão e consolidação do setor. A análise do movimento de ingresso do capital estrangeiro nos serviços e planos de saúde no Brasil foi desenvolvida a partir da construção de uma base dados com um total de 297 operações patrimoniais envolvendo empresas com atividades em serviços de saúde, inclusive operadoras de planos e seguros de saúde e administradoras de benefícios em saúde. A análise dessas operações evidencia que o afluxo de capital estrangeiro foi fundamental para viabilizar a centralização de capital em determinadas empresas e catalisar o processo de concentração e transformação estrutural do setor de serviços de saúde ao longo das últimas duas décadas. Conclui-se que o acirramento da disputa intercapitalista no mercado de serviços de saúde levou à emergência de grandes corporações no mercado e a novos modelos de negócio, com destaque especial para o surgimento de redes verticalizadas de atendimento (operação de planos, serviços hospitalares, ambulatoriais, de diagnóstico e tratamento e de atenção básica).

Abstract: This article analyzes the process of structural transformation within the Brazilian private health services market since the 2000s, with emphasis on the growing participation of financial funds and foreign capital in the process of expansion and consolidation of the sector. The analysis of the movement of foreign capital into health services and plans in Brazil was developed from the construction of a database with a total of 297 equity operations involving companies with activities in health services, including companies operating health plans and insurance and companies administering health benefits. The analysis of these operations shows that the influx of foreign capital was fundamental to enable the centralization of capital in certain companies and catalyze the process of concentration and structural transformation of the health services sector over the last two decades. We concluded that the intensification of the intercapitalist dispute within the health services market led to the emergence of large corporations and new business models, with special emphasis on the emergence of verticalized care networks (operation of plans, hospital services, outpatient services, diagnosis and treatment, and primary care).

Resumen: Este artículo analiza el proceso de transformación estructural en el mercado privado de servicios de salud brasileño, a partir de los años 2000, con énfasis en la creciente participación de fondos financieros y del capital extranjero en el proceso de expansión y consolidación del sector. El análisis del movimiento de ingreso del capital extranjero en los servicios y planes de salud en Brasil fue desarrollado a partir de la construcción de una base datos con un total de 297 operaciones de capital de empresas con actividades en servicios de salud; inclusive las empresas operadoras de planes y seguros de salud y las empresas administradoras de beneficios en salud. El análisis de esas operaciones muestra que la entrada de capital extranjero fue fundamental para viabilizar la centralización de capital en determinadas empresas y catalizar el proceso de concentración y transformación estructural del sector de servicios de salud a lo largo de las últimas dos décadas. La conclusión que el recrudecimiento de la disputa intercapitalista dentro del mercado de servicios de salud llevó a la emergencia de grandes corporaciones en el mercado y nuevos modelos de negocio, con destaque especial para surgimiento de redes verticalizadas de atención (operación de planes, servicios hospitalarios, ambulatorios, de diagnóstico y tratamiento y de atención básica).

The burden of physical inactivity for the public health care system in Brazil

ABSTRACT OBJECTIVE To update the estimated cost of physical inactivity for the Brazilian Unified Health System (SUS). METHODS The hospitalization costs were accessed via a database of the Ministry of Health - Informatics Department of the Brazilian SUS. Physical inactivity for the year 2017 was accessed via the Sistema de Vigilância de Fatores de Risco e Proteção para Doenças Crônicas por Inquérito Telefônico (Vigitel - Surveillance System for Risk and Protective Factors for Chronic Diseases by Telephone Survey). Seven chronic non-communicable diseases (NCD) were selected via the international classification of disease (ICD-10). The population fraction attributable to physical inactivity was calculated based on relative risk reported in previous studies and the prevalence of physical inactivity. RESULTS In 2017, the seven NCD considered in the analysis were responsible for 154,017 hospital admissions in adults older than 40 years old, residing in the state capitals and the Federal District, which corresponded to 6.5% of hospitalizations and 10.6% of SUS costs at an estimated US$ 112,524,914.47. Considering the group of individuals with insufficient physical activity in their leisure time, the percentage cost attributed to physical inactivity reached 17.4% of the estimated costs with NCD. At a national level, NCD were responsible for approximately 740 thousand hospitalizations, costing US$ 482 million, from which 17.4%, US$ 83 million were attributed to physical inactivity. CONCLUSION This study provides evidence to conclude that physical inactivity exerts an economic impact on the SUS due to NCD hospitalization. Physical inactivity is a modifiable lifestyle and compelling evidence, including that of this article, supports the promotion of a more active community as one of the major targets of public health care policies.

Effects of exposure to malathion on blood glucose concentration: a meta-analysis.

Exposure to malathion (an organophosphate pesticide widely used around the world) has been associated with alterations in blood glucose concentration in animal models. However, the results are inconsistent. The aim of this meta-analysis was to evaluate whether malathion exposure can disturb the concentrations of blood glucose in exposed rats. We performed a literature search of online databases including PubMed, EBSCO, and Google Scholar and reviewed original articles that analyzed the relation between malathion exposure and glucose levels in animal models. The selection of articles was based on inclusion and exclusion criteria. The database search identified thirty-five possible articles, but only eight fulfilled our inclusion criteria, and these studies were included in the meta-analysis. The effect of malathion on blood glucose concentration showed a non-monotonic dose-response curve. In addition, pooled analysis showed that blood glucose concentrations were 3.3-fold higher in exposed rats than in the control group (95% CI, 2-5; Z = 3.9; p < 0.0001) in a random-effect model. This result suggested that alteration of glucose homeostasis is a possible mechanism of toxicity associated with exposure to malathion.