A novel N95 respirator with chitosan nanoparticles: mechanical, antiviral, microbiological and cytotoxicity evaluations.

BACKGROUND: It is known that some sectors of hospitals have high bacteria and virus loads that can remain as aerosols in the air and represent a significant health threat for patients and mainly professionals that work in the place daily. Therefore, the need for a respirator able to improve the filtration barrier of N95 masks and even inactivating airborne virus and bacteria becomes apparent. Such a fact motivated the creation of a new N95 respirator which employs chitosan nanoparticles on its intermediate layer (SN95 + CNP). RESULTS: The average chitosan nanoparticle size obtained was 165.20 ± 35.00 nm, with a polydispersity index of 0.36 ± 0.03 and a zeta potential of 47.50 ± 1.70 mV. Mechanical tests demonstrate that the SN95 + CNP respirator is more resistant and meets the safety requisites of aerosol penetration, resistance to breath and flammability, presenting higher potential to filtrate microbial and viral particles when compared to conventional SN95 respirators. Furthermore, biological in vitro tests on bacteria, fungi and mammalian cell lines (HaCat, Vero E6 and CCL-81) corroborate the hypothesis that our SN95 + CNP respirator presents strong antimicrobial activity and is safe for human use. There was a reduction of 96.83% of the alphacoronavirus virus and 99% of H1N1 virus and MHV-3 betacoronavirus after 120 min of contact compared to the conventional respirator (SN95), demonstrating that SN95 + CNP have a relevant potential as personal protection equipment. CONCLUSIONS: Due to chitosan nanotechnology, our novel N95 respirator presents improved mechanical, antimicrobial and antiviral characteristics.

Pharmacokinetics of Curcumin Delivered by Nanoparticles and the Relationship with Antitumor Efficacy: A Systematic Review.

Curcumin is a polyphenolic compound, derived from Curcuma longa, and it has several pharmacological effects such as antioxidant, anti-inflammatory, and antitumor. Although it is a pleiotropic molecule, curcumin's free form, which is lipophilic, has low bioavailability and is rapidly metabolized, limiting its clinical use. With the advances in techniques for loading curcumin into nanostructures, it is possible to improve its bioavailability and extend its applications. In this review, we gather evidence about the comparison of the pharmacokinetics (biodistribution and bioavailability) between free curcumin (Cur) and nanostructured curcumin (Cur-NPs) and their respective relationships with antitumor efficacy. The search was performed in the following databases: Cochrane, LILACS, Embase, MEDLINE/Pubmed, Clinical Trials, BSV regional portal, ScienceDirect, Scopus, and Web of Science. The selected studies were based on studies that used High-Performance Liquid Chromatography (HPLC) as the pharmacokinetics evaluation method. Of the 345 studies initially pooled, 11 met the inclusion criteria and all included studies classified as high quality. In this search, a variety of nanoparticles used to deliver curcumin (polymeric, copolymeric, nanocrystals, nanovesicles, and nanosuspension) were found. Most Cur-NPs presented negative Zeta potential ranging from -25 mV to 12.7 mV, polydispersion index (PDI) ranging from 0.06 to 0.283, and hydrodynamic diameter ranging from 30.47 to 550.1 nm. Selected studies adopted mainly oral and intravenous administrations. In the pharmacokinetics analysis, samples of plasma, liver, tumor, lung, brain, kidney, and spleen were evaluated. The administration of curcumin, in nanoparticle systems, resulted in a higher level of curcumin in tumors compared to free curcumin, leading to an improved antitumor effect. Thus, the use of nanoparticles can be a promising alternative for curcumin delivery since this improves its bioavailability.

UV-Accelerated Synthesis of Gold Nanoparticle-Pluronic Nanocomposites for X-ray Computed Tomography Contrast Enhancement.

Eco-friendly chemical methods using FDA-approved Pluronic F127 (PLU) block copolymer have garnered much attention for simultaneously forming and stabilizing Au nanoparticles (AuNPs). Given the remarkable properties of AuNPs for usage in various fields, especially in biomedicine, we performed a systematic study to synthesize AuNP-PLU nanocomposites under optimized conditions using UV irradiation for accelerating the reaction. The use of UV irradiation at 254 nm resulted in several advantages over the control method conducted under ambient light (control). The AuNP-PLU-UV nanocomposite was produced six times faster, lasting 10 min, and exhibited lower size dispersion than the control. A set of experimental techniques was applied to determine the structure and morphology of the produced nanocomposites as affected by the UV irradiation. The MTT assay was conducted to estimate IC50 values of AuNP-PLU-UV in NIH 3T3 mouse embryonic fibroblasts, and the results suggest that the sample is more compatible with cells than control samples. Afterward, in vivo maternal and fetal toxicity assays were performed in rats to evaluate the effect of AuNP-PLU-UV formulation during pregnancy. Under the tested conditions, the treatment was found to be safe for the mother and fetus. As a proof of concept or application, the synthesized Au:PLU were tested as contrast agents with an X-ray computed tomography scan (X-ray CT).

Evaluation of Biocompatibility, Anti-Inflammatory, and Antinociceptive Activities of Pequi Oil-Based Nanoemulsions in In Vitro and In Vivo Models.

Pequi oil (Caryocar brasiliense) contains bioactive compounds capable of modulating the inflammatory process; however, its hydrophobic characteristic limits its therapeutic use. The encapsulation of pequi oil in nanoemulsions can improve its biodistribution and promote its immunomodulatory effects. Thus, the objective of the present study was to formulate pequi oil-based nanoemulsions (PeNE) to evaluate their biocompatibility, anti-inflammatory, and antinociceptive effects in in vitro (macrophages­J774.16) and in vivo (Rattus novergicus) models. PeNE were biocompatible, showed no cytotoxic and genotoxic effects and no changes in body weight, biochemistry, or histology of treated animals at all concentrations tested (90−360 µg/mL for 24 h, in vitro; 100−400 mg/kg p.o. 15 days, in vivo). It was possible to observe antinociceptive effects in a dose-dependent manner in the animals treated with PeNE, with a reduction of 27 and 40% in the doses of 100 and 400 mg/kg of PeNE, respectively (p < 0.05); however, the treatment with PeNE did not induce edema reduction in animals with carrageenan-induced edema. Thus, the promising results of this study point to the use of free and nanostructured pequi oil as a possible future approach to a preventive/therapeutic complementary treatment alongside existing conventional therapies for analgesia.

Ethnobotany as a parameter for the study of cultural mimicry among Roma people / La etnobotánica como parámetro para el estudio del mimetismo cultural entre el pueblo gitano

The nomadic behavior of Roma people has allowed their cultural interaction with people from different continents. Brazil has received Roma immigrants since its colonization, and there are currently more than 800,000 Roma people among the Brazilian population. This article describes the ethnobotanical knowledge of two Calon families (Alves a nd Dantas) esta blished in hinterland cities of Pernambuco, northeastern Brazil. The survey was conducted with 23 informants (≥ 40 years old, 85% of the target audience) selected through the snowball technique and using semi - structured interviews. The plants mentioned wer e collected, identified and deposited in the IPA and UFP herbaria. The 157 species (85 native) are used for food, condiment, cosmetic, medicinal, ritualistic, technological, veterinary, and other purposes. The useful flora and forms of use are similar to t hose reported by non - Roma communities living in the same region, showing a kind of mimicry adopted by the Roma people, yet maintaining their cultural identity.

El comportamiento nómada de los gitanos ha permitido su interacción cultural con personas de diferentes continentes. Brasil ha recibido inmigrantes romaníes desde su colonización y actualmente hay más de 800.000 romaníes entre la población brasileñ a. Este artículo describe el conocimiento etnobotá nico de dos familias Calon (Alves y Dantas) establecidas en ciudades del interior de Pernambuco, noreste de Brasil. La encuesta se realizó con 23 informantes (≥ 40 años, 85% del público objetivo) seleccionados mediante la técnica de bola de nieve y mediant e entrevistas semiestructuradas. Las plantas mencionadas fueron recolectadas, identificadas y depositadas en los herbarios IPA y UFP. Las 157 especies (85 nativas) se utilizan para alimentos, condimentos, cosméticos, medicinales, ritualistas, tecnológicos, veterinarios y otros fines. La flora útil y las formas de uso son similares a las reportadas por las comunidades no gitanas que viven en la misma región, mostrando una especie de mimetismo adoptado por el pueblo gitano, pero manteniendo su identidad cultu ral.

[Public-private partnerships in hospital administration in the Brazilian Unified National Health System in Bahia State, Brazil]. / Parceria público-privada na gestão hospitalar no Sistema Único de Saúde da Bahia, Brasil.

The process of building Brazil´s Unified Health System has always been a space of dispute between the political forces that defend greater private sector participation in patient care and administration of services and those who defend strengthening public administration. In the context of underfinancing of the Brazilian Unified National Health System (SUS), associated with the restrictions imposed by the so-called Fiscal Responsibility Law, new management models have been adopted in hospital administration, including public-private partnerships (PPPs). Considering the relevance of investigating decision-making processes pertaining to the adoption of these models by State Health Departments, this study aims to analyze the decision-making processes and incorporation of this hospital administration model in the State of Bahia, Brazil, the first administrative concession in Brazil´s health sector. This is a case study in which the theoretical reference was Social Game Theory elaborated by Carlos Matus, linked to the Public Policy Cycle analytical model. The data were produced with document research and semi-structured interviews with key informants who participated in the pre-decision and decision-making stages of the PPP model. The article presents the political game involved in the choice of this alternative among other hospital administration models, besides debating the models´ advantages and disadvantages according to the key actors and concludes that determinants (not only financial, but also political and ideological) marked the decision-making process for the PPP model in Bahia, in which the driving factor and source of consultancy was the International Finance Corporation, an arm of the World Bank.

O processo de construção do Sistema Único de Saúde (SUS) tem sido, desde o início, espaço de disputa entre as forças políticas que defendem a ampliação da participação do setor privado na assistência e gestão dos serviços, e os defensores do fortalecimento da gestão pública. No contexto do subfinanciamento do SUS, associado às restrições impostas pela Lei de Responsabilidade Fiscal, novos modelos de gestão têm sido adotados, especialmente na área de gestão hospitalar, a exemplo da parceria público-privada (PPP). Considerando a relevância de investigar os processos de decisão relativos à adoção desses modelos pelas Secretarias Estaduais de Saúde, este trabalho tem por objetivo analisar os processos de tomada de decisão e incorporação desse modelo de gestão hospitalar no Estado da Bahia, Brasil, primeira concessão administrativa no setor de saúde do Brasil. Trata-se de um estudo de caso que tomou como referencial teórico a teoria do jogo social, elaborada por Carlos Matus, articulada ao modelo analítico do Ciclo de Políticas Públicas. Os dados foram produzidos a partir de pesquisa documental e entrevistas semiestruturadas com informantes-chave que participaram dos momentos de pré-decisão e decisão acerca do modelo PPP. O artigo apresenta o jogo político em torno da escolha dessa alternativa entre outros modelos para gestão hospitalar, além de debater vantagens e desvantagens dos modelos segundo atores-chave entrevistados, e conclui que determinantes não apenas financeiros, mas também políticos e ideológicos marcaram o processo de decisão pelo modelo PPP na Bahia, que teve como fomentador e consultor o braço direito do Banco Mundial, a Corporação Financeira Internacional.

El proceso de construcción del Sistema Único de Salud ha sido, desde el comienzo, un espacio de disputa entre las fuerzas políticas que defienden la ampliación de la participación del sector privado en la asistencia y gestión de los servicios, y los defensores del fortalecimiento de la gestión pública. En el contexto de la subfinanciación del SUS, asociado a las restricciones impuestas por la Ley de responsabilidad fiscal, se han adoptado nuevos modelos de gestión, especialmente en el área de gestión hospitalaria, como por ejemplo la colaboración público-privada (PPP por sus siglas en portugués). Considerando la relevancia de investigar los procesos de decisión, relativos a la adopción de esos modelos por parte de las Secretarías Estatales de Salud, este trabajo tiene como objetivo analizar los procesos de toma de decisión e incorporación de este modelo de gestión hospitalaria en el Estado de Bahía, Brasil, primera concesión administrativa en el sector de salud de Brasil. Se trata de un estudio de caso, que tomó como marco de referencia teórico la Teoría de Juego Social, elaborada por Carlos Matus, coordinada con el modelo analítico del Ciclo de Políticas Públicas. Los datos fueron producidos a partir de una investigación documental y entrevistas semiestructuradas con informantes-clave que participaron en los momentos de pre-decisión y decisión acerca del modelo PPP. El artículo presenta el juego político en torno de la elección de esa alternativa entre otros modelos para gestión hospitalaria, además de debatir ventajas y desventajas de los modelos, según actores-claves entrevistados, y concluye que determinantes no solo financieros, sino políticos e ideológicos marcaron el proceso de decisión del modelo PPP en Bahía, que tuvo como fomentador y consultor al brazo derecho del Banco Mundial, la Corporación Financiera Internacional.

Combination of selol nanocapsules and magnetic hyperthermia hinders breast tumor growth in aged mice after a short-time treatment.

Short time treatment with reduced dosages of selol-loaded PLGA nanocapsules (NcSel) combined with magnetic hyperthermia (MHT) is evaluated in aged Erhlich tumor-bearing mice. Clinical, hematological, biochemical, genotoxic and histopathological parameters are assessed during 7 d treatment with NcSel and MHT, separately or combined. The time evolution of the tumor volume is successfully modeled using the logistic mathematical model. The combined therapy comprising NcSel and MHT is able to hinder primary tumor growth and a case of complete tumor remission is recorded. Moreover, no metastasis was diagnosed and the adverse effects are negligible. NcSel plus MHT may represent an effective and safe alternative to cancer control in aged patients. Future clinical trials are encouraged.

Parceria público-privada na gestão hospitalar no Sistema Único de Saúde da Bahia, Brasil / Public-private partnerships in hospital administration in the Brazilian Unified National Health System in Bahia State, Brazil / Colaboración público-privada en la gestión hospitalaria en el Sistema Único de Salud de Bahía, Brasil

Resumo: O processo de construção do Sistema Único de Saúde (SUS) tem sido, desde o início, espaço de disputa entre as forças políticas que defendem a ampliação da participação do setor privado na assistência e gestão dos serviços, e os defensores do fortalecimento da gestão pública. No contexto do subfinanciamento do SUS, associado às restrições impostas pela Lei de Responsabilidade Fiscal, novos modelos de gestão têm sido adotados, especialmente na área de gestão hospitalar, a exemplo da parceria público-privada (PPP). Considerando a relevância de investigar os processos de decisão relativos à adoção desses modelos pelas Secretarias Estaduais de Saúde, este trabalho tem por objetivo analisar os processos de tomada de decisão e incorporação desse modelo de gestão hospitalar no Estado da Bahia, Brasil, primeira concessão administrativa no setor de saúde do Brasil. Trata-se de um estudo de caso que tomou como referencial teórico a teoria do jogo social, elaborada por Carlos Matus, articulada ao modelo analítico do Ciclo de Políticas Públicas. Os dados foram produzidos a partir de pesquisa documental e entrevistas semiestruturadas com informantes-chave que participaram dos momentos de pré-decisão e decisão acerca do modelo PPP. O artigo apresenta o jogo político em torno da escolha dessa alternativa entre outros modelos para gestão hospitalar, além de debater vantagens e desvantagens dos modelos segundo atores-chave entrevistados, e conclui que determinantes não apenas financeiros, mas também políticos e ideológicos marcaram o processo de decisão pelo modelo PPP na Bahia, que teve como fomentador e consultor o braço direito do Banco Mundial, a Corporação Financeira Internacional.

Abstract: The process of building Brazil´s Unified Health System has always been a space of dispute between the political forces that defend greater private sector participation in patient care and administration of services and those who defend strengthening public administration. In the context of underfinancing of the Brazilian Unified National Health System (SUS), associated with the restrictions imposed by the so-called Fiscal Responsibility Law, new management models have been adopted in hospital administration, including public-private partnerships (PPPs). Considering the relevance of investigating decision-making processes pertaining to the adoption of these models by State Health Departments, this study aims to analyze the decision-making processes and incorporation of this hospital administration model in the State of Bahia, Brazil, the first administrative concession in Brazil´s health sector. This is a case study in which the theoretical reference was Social Game Theory elaborated by Carlos Matus, linked to the Public Policy Cycle analytical model. The data were produced with document research and semi-structured interviews with key informants who participated in the pre-decision and decision-making stages of the PPP model. The article presents the political game involved in the choice of this alternative among other hospital administration models, besides debating the models´ advantages and disadvantages according to the key actors and concludes that determinants (not only financial, but also political and ideological) marked the decision-making process for the PPP model in Bahia, in which the driving factor and source of consultancy was the International Finance Corporation, an arm of the World Bank.

Resumen: El proceso de construcción del Sistema Único de Salud ha sido, desde el comienzo, un espacio de disputa entre las fuerzas políticas que defienden la ampliación de la participación del sector privado en la asistencia y gestión de los servicios, y los defensores del fortalecimiento de la gestión pública. En el contexto de la subfinanciación del SUS, asociado a las restricciones impuestas por la Ley de responsabilidad fiscal, se han adoptado nuevos modelos de gestión, especialmente en el área de gestión hospitalaria, como por ejemplo la colaboración público-privada (PPP por sus siglas en portugués). Considerando la relevancia de investigar los procesos de decisión, relativos a la adopción de esos modelos por parte de las Secretarías Estatales de Salud, este trabajo tiene como objetivo analizar los procesos de toma de decisión e incorporación de este modelo de gestión hospitalaria en el Estado de Bahía, Brasil, primera concesión administrativa en el sector de salud de Brasil. Se trata de un estudio de caso, que tomó como marco de referencia teórico la Teoría de Juego Social, elaborada por Carlos Matus, coordinada con el modelo analítico del Ciclo de Políticas Públicas. Los datos fueron producidos a partir de una investigación documental y entrevistas semiestructuradas con informantes-clave que participaron en los momentos de pre-decisión y decisión acerca del modelo PPP. El artículo presenta el juego político en torno de la elección de esa alternativa entre otros modelos para gestión hospitalaria, además de debatir ventajas y desventajas de los modelos, según actores-claves entrevistados, y concluye que determinantes no solo financieros, sino políticos e ideológicos marcaron el proceso de decisión del modelo PPP en Bahía, que tuvo como fomentador y consultor al brazo derecho del Banco Mundial, la Corporación Financiera Internacional.

Hospital contingency in coping with COVID-19 in Brazil: governmental problems and alternatives. / Contingência hospitalar no enfrentamento da COVID-19 no Brasil: problemas e alternativas governamentais.

This paper analyzes the government's strategic agenda for coping with COVID-19 in Brazil, focusing on hospital care. Twenty-eight Contingency Plans were analyzed in full, one national, 26 at state level, and one from the Federal District. The Public Policy Cycle's theoretical framework was used, specifically governmental pre-decision and decision to face the pandemic. The evidence revealed convergences between the national and state levels concerning proposals for reorienting care flow, detecting cases, and indicating referral hospitals. However, the state agendas revealed weaknesses in acquiring mechanical ventilation devices, sizing human resources, and regionalizing hospital care. Moreover, few states have established a method for calculating back-end beds, mainly regarding the outlook of opening hospitals of reference or contracting additional ICU beds. We can conclude that the heterogeneous actions explained in the plans show the complex process of coping with COVID-19 in Brazil with its regional inequalities, weaknesses in the state health systems, and reduced coordination by the Ministry of Health.

Este artigo analisa a agenda governamental estratégica para enfrentamento da COVID-19 no Brasil, com foco na atenção hospitalar. Foram analisados 28 Planos de Contingência na íntegra, sendo 01 nacional, 26 estaduais e 01 do Distrito Federal. Utilizou-se o referencial teórico do Ciclo da Política Pública, especificamente os momentos de pré-decisão e decisão governamental para o enfrentamento da pandemia. As evidências revelaram convergências entre os níveis nacional e estaduais quanto às propostas de reorientação do fluxo de atendimento, detecção dos casos e indicação de hospitais de referência. Todavia, as agendas estaduais demonstraram fragilidades correlacionadas à aquisição de aparelhos de ventilação mecânica, dimensionamento de recursos humanos, regionalização da atenção hospitalar, além de poucos estados terem estabelecido um método de cálculo de leitos de retaguarda, principalmente quanto a previsão de abertura de hospitais de referência ou contratação complementar de leitos de UTI. Conclui-se que a heterogeneidade de ações explicitadas nos planos revelaa complexidade do processo de enfrentamento da COVID-19 no Brasil com suas desigualdades regionais, fragilidades dos sistemas estaduais de saúde e reduzida coordenação do Ministério da Saúde.

Contingência hospitalar no enfrentamento da COVID-19 no Brasil: problemas e alternativas governamentais / Hospital contingency in coping with COVID-19 in Brazil: governmental problems and alternatives

Resumo Este artigo analisa a agenda governamental estratégica para enfrentamento da COVID-19 no Brasil, com foco na atenção hospitalar. Foram analisados 28 Planos de Contingência na íntegra, sendo 01 nacional, 26 estaduais e 01 do Distrito Federal. Utilizou-se o referencial teórico do Ciclo da Política Pública, especificamente os momentos de pré-decisão e decisão governamental para o enfrentamento da pandemia. As evidências revelaram convergências entre os níveis nacional e estaduais quanto às propostas de reorientação do fluxo de atendimento, detecção dos casos e indicação de hospitais de referência. Todavia, as agendas estaduais demonstraram fragilidades correlacionadas à aquisição de aparelhos de ventilação mecânica, dimensionamento de recursos humanos, regionalização da atenção hospitalar, além de poucos estados terem estabelecido um método de cálculo de leitos de retaguarda, principalmente quanto a previsão de abertura de hospitais de referência ou contratação complementar de leitos de UTI. Conclui-se que a heterogeneidade de ações explicitadas nos planos revelaa complexidade do processo de enfrentamento da COVID-19 no Brasil com suas desigualdades regionais, fragilidades dos sistemas estaduais de saúde e reduzida coordenação do Ministério da Saúde.

Abstract This paper analyzes the government's strategic agenda for coping with COVID-19 in Brazil, focusing on hospital care. Twenty-eight Contingency Plans were analyzed in full, one national, 26 at state level, and one from the Federal District. The Public Policy Cycle's theoretical framework was used, specifically governmental pre-decision and decision to face the pandemic. The evidence revealed convergences between the national and state levels concerning proposals for reorienting care flow, detecting cases, and indicating referral hospitals. However, the state agendas revealed weaknesses in acquiring mechanical ventilation devices, sizing human resources, and regionalizing hospital care. Moreover, few states have established a method for calculating back-end beds, mainly regarding the outlook of opening hospitals of reference or contracting additional ICU beds. We can conclude that the heterogeneous actions explained in the plans show the complex process of coping with COVID-19 in Brazil with its regional inequalities, weaknesses in the state health systems, and reduced coordination by the Ministry of Health.

In Vivo Efficacy and Toxicity of Curcumin Nanoparticles in Breast Cancer Treatment: A Systematic Review.

Breast cancer is one of the most prevalent types of malignant tumors in the world, resulting in a high incidence of death. The development of new molecules and technologies aiming to apply more effective and safer therapy strategies has been intensively explored to overcome this situation. The association of nanoparticles with known antitumor compounds (including plant-derived molecules such as curcumin) has been considered an effective approach to enhance tumor growth suppression and reduce adverse effects. Therefore, the objective of this systematic review was to summarize published data regarding evaluations about efficacy and toxicity of curcumin nanoparticles (Cur-NPs) in in vivo models of breast cancer. The search was carried out in the databases: CINAHL, Cochrane, LILACS, Embase, FSTA, MEDLINE, ProQuest, BSV regional portal, PubMed, ScienceDirect, Scopus, and Web of Science. Studies that evaluated tumor growth in in vivo models of breast cancer and showed outcomes related to Cur-NP treatment (without association with other antitumor molecules) were included. Of the 528 initially gathered studies, 26 met the inclusion criteria. These studies showed that a wide variety of NP platforms have been used to deliver curcumin (e.g., micelles, polymeric, lipid-based, metallic). Attachment of poly(ethylene glycol) chains (PEG) and active targeting moieties were also evaluated. Cur-NPs significantly reduced tumor volume/weight, inhibited cancer cell proliferation, and increased tumor apoptosis and necrosis. Decreases in cancer stem cell population and angiogenesis were also reported. All the studies that evaluated toxicity considered Cur-NP treatment to be safe regarding hematological/biochemical markers, damage to major organs, and/or weight loss. These effects were observed in different in vivo models of breast cancer (e.g., estrogen receptor-positive, triple-negative, chemically induced) showing better outcomes when compared to treatments with free curcumin or negative controls. This systematic review supports the proposal that Cur-NP is an effective and safe therapeutic approach in in vivo models of breast cancer, reinforcing the currently available evidence that it should be further analyzed in clinical trials for breast cancer treatments.

Melittin sensitizes skin squamous carcinoma cells to 5-fluorouracil by affecting cell proliferation and survival.

Combined 5-fluorouracil (5-FU) and melittin (MEL) is believed to enhance cytotoxic effects on skin squamous cell carcinoma (SCC). However, the rationale underlying cytotoxicity is fundamentally important for a proper design of combination chemotherapy, and to provide translational insights for future therapeutics in the dermatology field. The aim was to elucidate the effects of 5-FU/MEL combination on the viability, proliferation and key structures of human squamous cell carcinoma (A431). Morphology, plasma membrane, DNA, mitochondria, oxidative stress, cell viability, proliferation and cell death pathways were targeted for investigation by microscopy, MTT, trypan blue assay, flow cytometry and real-time cell analysis. 5-FU/MEL (0.25 µM/0.52 µM) enhanced the cytotoxic effect in A431 cells (74.46%, p < .001) after 72 h exposure, showing greater cytotoxic effect when compared to each isolated compound (45.55% 5-FU and 61.78% MEL). The results suggest that MEL induces plasma membrane alterations that culminate in a loss of integrity at subsequent times, sensitizing the cell to 5-FU action. DNA fragmentation, S and G2/M arrest, disruption of mitochondrial metabolism, and alterations in cell morphology culminated in proliferation blockage and apoptosis. 5-FU/MEL combination design optimizes the cytotoxic effects of each drug at lower concentrations, which may represent an innovative strategy for SCC therapy.

The health of healthcare professionals coping with the Covid-19 pandemic. / A saúde dos profissionais de saúde no enfrentamento da pandemia de Covid-19.

This work aims to systematize a set of scientific evidence presented in international papers that identify the main problems affecting health professionals directly involved in coping with the COVID-19 pandemic and point out actions and strategies for the protection and healthcare of these professionals. The risk of infection is the main issue and has led to absence from work, illness, death, and intense psychological distress, expressed in generalized anxiety and sleep disorders, fear of becoming ill and infecting colleagues and relatives. In the Brazilian reality, this work revives the analysis of the chronic problems affecting health workers, resulting from the underfinancing of the Brazilian Unified Health System (SUS), the sector's spending freeze, the deterioration of services and workforce's insecurity, and points out the acute challenges of work management and staff training, given the expanded hospital bed infrastructure and reorganization of the work process in primary care to face the pandemic, emphasizing the necessary measures for the protection and promotion of the physical and mental health of health professionals and workers.

Synergistic Antitumor Efficacy of Magnetohyperthermia and Poly(lactic-co-glycolic acid)-Encapsulated Selol in Ehrlich Breast Adenocarcinoma Treatment in Elderly Swiss Mice.

Nanobiotechnology strategies for cancer treatments are currently being tested with increasing interest, except in elderly groups. It is well established that breast cancer incidence increases with age and that traditional therapies usually generate severe adverse effects, especially for elderly groups. To investigate if the benefits of nanotechnology could be extended to treating cancer in this group, citrate-coated maghemite nanoparticles (NpCit) were used for magnetohyperthermia (MHT) in combination with the administration of PLGA-Selol nanocapsule (NcSel), a formulation with antioxidant and antitumor activity. The combined therapies significantly inhibited breast Ehrlich tumor growth and prevented metastases to the lymph nodes, liver and lungs until 45 days after tumor induction, a better result than the group undergoing conventional drug treatment. The levels of TNF-α, associated with poor prognosis in Ehrlich tumor, were also normalized. Therefore, the results evidenced the potential use of these therapies for future clinical trials in elderly breast cancer patients.

Tumor cell death in orthotopic breast cancer model by NanoALA: a novel perspective on photodynamic therapy in oncology.

Aim: Nano-5-aminolevulic acid (NanoALA)-mediated photodynamic therapy (PDT), an oil-in-water polymeric nanoemulsion of ALA, was evaluated in a murine model of breast cancer. Materials & methods: Analysis of ALA-derived protoporphyrin IX production and acute toxicity test, biocompatibility and treatment efficacy, and long-term effect of NanoALA-PDT on tumor progression were performed. Results: The nanoformulation favored the prodrug uptake by tumor cells in a shorter time (1.5 h). As a result, the adverse effects were negligible and the response rates for primary mammary tumor control were significantly improved. Tumor progression was slower after NanoALA-PDT treatment, providing longer survival. Conclusion: NanoALA is a good proactive drug candidate for PDT against cancer potentially applied as adjuvant/neoadjuvant intervention strategy for breast cancer.

Ethnomedicinal plants for veterinary use in gypsy communities of the northeast of Brazil / Plantas etnomedicinales para uso veterinario en comunidades gitanas del noreste de Brasil

Gypsies have been in Brazil since the 16th century and today they are more than 800,000 in the country. This article describes the veterinary use of plants by Calon gypsies living in Pernambuco, Northeastern Brazil. The research was carried out with 23 people (> 40 years old), using semi-structured forms and the snowball technique. The cited species were collected during guided tours, identified and deposited at the IPA and UFP herbaria. Ten plants were indicated for veterinary use: Agave sisalana (Asparagaceae), Aspidosperma pyrifolium (Apocynaceae), Apodanthera congestiflora (Cucurbitaceae), Heliotropium indicum (Boraginaceae), Lippia alba (Verbenaceae), Momordica charantia (Cucurbitaceae), Nicotiana tabacum (Solanaceae), Passiflora cincinnata (Passifloraceae), Phaseolus lunatus (Fabaceae), and Solanum paniculatum (Solanaceae). The participants cited various methods of preparation and therapeutic indications for ectoparasitic infections, digestive disorders, and eye and respiratory infections in farm animals. Apodanthera congestiflora and H. indicum stood out for prophylaxis and treatment of Newcastle disease in fowl.

Los gitanos están en Brasil desde el siglo XVI y hoy, son más de 800.000 en el país. Este artículo describe el uso veterinario de plantas por gitanos Calon que viven en Pernambuco, Noreste de Brasil. La encuesta fue realizada con 23 personas (> 40 años), utilizando formularios semi-estructurados y la técnica bola de nieve. Las especies citadas fueron recolectadas en giras guiadas, identificadas y depositadas en los herbarios IPA y UFP. Diez plantas fueron citadas para uso veterinario: Agave sisalana (Asparagaceae), Aspidosperma pyrifolium (Apocynaceae), Apodanthera congestiflora (Cucurbitaceae), Heliotropium indicum (Boraginaceae), Lippia alba (Verbenaceae), Momordica charantia (Cucurbitaceae), Nicotiana tabacum (Solanaceae), Passiflora cincinnata (Passifloraceae), Phaseolus lunatus (Fabaceae) y Solanum paniculatum (Solanaceae). Los participantes citaron varios modos de preparación e indicaciones terapéuticas para infecciones ectoparasitarias, disturbios digestivos, infecciones oculares y respiratorias en animales domésticos. Apodanthera congestiflora y H. indicum se destacaron en la profilaxis y tratamiento de la enfermedad de Newcastle en aves.

A saúde dos profissionais de saúde no enfrentamento da pandemia de Covid-19 / The health of healthcare professionals coping with the Covid-19 pandemic

Resumo Este trabalho tem como objetivo sistematizar um conjunto de evidências científicas apresentadas em artigos internacionais que identificam os principais problemas que estão afetando os profissionais de saúde envolvidos diretamente no enfrentamento da pandemia de COVID-19 e apontam ações e estratégias para a proteção e a assistência à saúde desses profissionais. O principal problema é o risco de contaminação que tem gerado afastamento do trabalho, doença e morte, além de intenso sofrimento psíquico, que se expressa em transtorno de ansiedade generalizada, distúrbios do sono, medo de adoecer e de contaminar colegas e familiares. Situando esta problemática na realidade brasileira, este artigo resgata a análise dos problemas crônicos que afetam os trabalhadores de saúde, decorrentes do sub-financiamento do SUS, do congelamentos dos gastos no setor, da deterioração dos serviços e da precarização da força de trabalho e aponta os desafios agudos que se apresentam à gestão do trabalho e capacitação de pessoal, diante da expansão da infraestrutura de leitos hospitalares e da reorganização do processo de trabalho na atenção básica para o enfrentamento da pandemia, enfatizando as medidas necessárias para a proteção e a promoção da saúde física e mental dos profissionais e trabalhadores da saúde.

Abstract This work aims to systematize a set of scientific evidence presented in international papers that identify the main problems affecting health professionals directly involved in coping with the COVID-19 pandemic and point out actions and strategies for the protection and healthcare of these professionals. The risk of infection is the main issue and has led to absence from work, illness, death, and intense psychological distress, expressed in generalized anxiety and sleep disorders, fear of becoming ill and infecting colleagues and relatives. In the Brazilian reality, this work revives the analysis of the chronic problems affecting health workers, resulting from the underfinancing of the Brazilian Unified Health System (SUS), the sector's spending freeze, the deterioration of services and workforce's insecurity, and points out the acute challenges of work management and staff training, given the expanded hospital bed infrastructure and reorganization of the work process in primary care to face the pandemic, emphasizing the necessary measures for the protection and promotion of the physical and mental health of health professionals and workers.