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FioAntar, FIOCRUZ's research project in Antarctica, is based on the One Health approach. FioAntar aims to generate relevant information that will help reduce the risk of future pandemics and improve the search for chemical compounds and new biological molecules. After four expeditions to Antarctica under the scope of PROANTAR, Fiocruz has identified Influenza H11N2 virus in environmental fecal samples, as well as Histoplasma capsulatum and Bacillus cereus in soil samples. In addition, in a prospective virome analysis from different lakes in the South Shetland Islands, six viral orders were described, supporting future research related to the biodiversity and viral ecology in this extreme ecosystem. Our findings of environmental pathogens of public health importance are a warning about the urgency of establishing a surveillance agenda on zoonoses in Antarctica due to the imminent risks that ongoing environmental and climate changes impose on human health across the planet. FioAntar strives to establish a comprehensive surveillance program across Antarctica, monitoring circulation of pathogens with the potential to transcend continent boundaries, thereby mitigating potential spread. For Fiocruz, Antarctica signifies a new frontier, teeming with opportunities to explore novel techniques, refine established methodologies, and cultivate invaluable knowledge.
Assuntos
Monitoramento Ambiental , Regiões Antárticas , Humanos , Monitoramento Ambiental/métodos , Saúde Única , Animais , Saúde PúblicaRESUMO
BACKGROUND: Clove volatile oil (CVO) and its major compound, eugenol (EUG), have anxiolytic effects, but their clinical use has been impaired due to their low bioavailability. Thus, their encapsulation in nanosystems can be an alternative to overcome these limitations. OBJECTIVES: This work aims to prepare, characterize and study the anxiolytic potential of CVO loaded-nanoemulsions (CVO-NE) against anxious-like behavior in adult zebrafish (Danio rerio). METHODS: The CVO-NE was prepared using Agaricus blazei Murill polysaccharides as stabilizing agent. The drug-excipient interactions were performed, as well as colloidal characterization of CVO-NE and empty nanoemulsion (B-NE). The acute toxicity and potential anxiolytic activity of CVO, EUG, CVO-NE and B-NE against adult zebrafish models were determined. RESULTS: CVO, EUG, CVO-NE and B-NE presented low acute toxicity, reduced the locomotor activity and anxious-like behavior of the zebrafish at 4 - 20 mg kg-1. CVO-NE reduced the anxious-like behavior of adult zebrafish without affecting their locomotor activity. In addition, it was demonstrated that anxiolytic activity of CVO, EUG and CVO-NE is linked to the involvement of GABAergic pathway. CONCLUSION: Therefore, this study demonstrates the anxiolytic effect of CVO, in addition to providing a new nanoformulation for its administration.
Assuntos
Ansiolíticos , Óleos Voláteis , Syzygium , Animais , Óleo de Cravo/farmacologia , Óleo de Cravo/metabolismo , Óleos Voláteis/farmacologia , Peixe-Zebra , Syzygium/metabolismo , Ansiolíticos/farmacologia , Ansiolíticos/metabolismo , Eugenol/farmacologia , Eugenol/metabolismoRESUMO
Macromolecules with antioxidant properties such as polysaccharides from Agaricus blazei Murill mushroom (PAbs) are an excellent option for manufacturing wound dressings. Based on this, this study aimed to analyze preparation, physicochemical characterization, and assessment of the potential wound-healing activity of films based on sodium alginate and polyvinyl alcohol loaded with PAbs. PAbs did not significantly alter the cell viability of human neutrophils in a concentration range of 1-100 µg mL-1. The Infrared Spectroscopy (FTIR) indicates that the components present in the films (PAbs/Sodium Alginate (SA)/Polyvinyl Alcohol (PVA)) present an increase in hydrogen bonds due to the increase of hydroxyls present in the components. Thermogravimetry (TGA), Differential Scanning Calorimetry (DSC) and X-ray Diffraction (XRD) characterizations indicate a good miscibility between the components where PAbs increasing the amorphous characteristics of the films and that the addition of SA increased the mobility of the chains PVA polymers. The addition of PAbs to films significantly improves properties such as mechanical, thickness, and water vapor permeation. The morphological study evidenced good miscibility between the polymers. The wound healing evaluation indicated that F100 film presented better results from the fourth day onward compared to the other groups. It favored the formation of a thicker dermis (476.8 ± 18.99 µm), with greater collagen deposition and a significant reduction in malondialdehyde and nitrite/nitrate, markers of oxidative stress. These results indicate that PAbs is a candidate for wound dressing.
Assuntos
Alginatos , Álcool de Polivinil , Humanos , Álcool de Polivinil/química , Alginatos/química , Polissacarídeos/farmacologia , Cicatrização , Bandagens , PolímerosRESUMO
In this study, pentacyclic triterpene-loaded emulsions were stabilized by polysaccharides from Agaricus blazei Murill mushroom (PAb). The drug-excipient compatibility results by Fourier Transform Infrared Spectroscopy (FTIR) and Differential Scanning Calorimetry (DSC) showed the absence of physicochemical incompatibilities. The use of these biopolymers at 0.75 % led to obtaining emulsions with droplets smaller than 300 nm, moderate polydispersity, and ζ-potential >30 mV in modulus. The emulsions presented high encapsulation efficiency, suitable pH for topical application, and absence of macroscopic signs of instability during 45 days. Morphological analysis suggested the deposition of thin layers of PAb around the droplets. The encapsulation of pentacyclic triterpene in emulsions, stabilized by PAb, improved the cytocompatibility of this drug against PC12 and murine astrocyte cells. There was a reduction in cytotoxicity, which resulted in a lower accumulation of intracellular reactive oxygen species and maintenance of the mitochondrial transmembrane potential. Based on these results, it is estimated that PAb are promising biopolymers for the emulsions' stabilization by improving their physicochemical and biological properties.
Assuntos
Agaricus , Citoproteção , Camundongos , Animais , Emulsões , Polissacarídeos/farmacologia , Polissacarídeos/química , Agaricus/química , Triterpenos PentacíclicosRESUMO
This work aimed the development and evaluation of the wound healing activity of films based on sodium alginate, polyvinyl alcohol (PVA) and Ca2+ loaded with Agaricus blazei Murill hydroalcoholic extract (AbE). Firstly, AbE was prepared using a previously standardized methodology. The films were prepared by casting technique and cross-linked with Ca2+ using CaCl2 as cross-linking agent. The physicochemical, morphological and water vapor barrier properties of the films were analyzed and the pre-clinical efficacy was investigated against the cutaneous wound model in mice. The films showed barrier properties to water vapor promising for wound healing. AbE showed physical and chemical interactions between both polymers, noticed by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and thermal analysis. The delivery of AbE in alginate/PVA films enhanced the antioxidant and wound healing properties of these polymers. Consequently, a reduction of malondialdehyde levels was observed, as well as an increase of the epidermis/dermis thickness and enhancement in collagen I deposition. Thus, these formulations are promising biomaterials for wound care and tissue repairing.
Assuntos
Alginatos , Álcool de Polivinil , Camundongos , Animais , Alginatos/farmacologia , Alginatos/química , Álcool de Polivinil/farmacologia , Álcool de Polivinil/química , Vapor , CicatrizaçãoRESUMO
Visceral leishmaniasis (VL) is mainly caused by Leishmania (Leishmania) donovani and Leishmania (L.) infantum; however, other Leishmania species have been associated with VL. We report a case of a patient simultaneously diagnosed with VL caused by Leishmania (L.) amazonensis and Hodgkin's lymphoma. After treatment with liposomal amphotericin B and chemotherapy, the patient presented a clinical cure. This case report reinforces the hypothesis that other Leishmania species can cause visceral lesions mainly related to immunosuppression.
Assuntos
Doença de Hodgkin , Leishmania donovani , Leishmania infantum , Leishmaniose Visceral , Doença de Hodgkin/complicações , Doença de Hodgkin/tratamento farmacológico , Humanos , Leishmaniose Visceral/complicações , Leishmaniose Visceral/diagnóstico , Leishmaniose Visceral/tratamento farmacológicoRESUMO
ETHNOPHARMACOLOGICAL RELEVANCE: The use of mushrooms in medicine is quite old and the first report about the use of genus Agaricus in treatment of ulcers occurred in Byzantine period. This mushroom is widely consumed as food, tea, food supplements, as well as nutraceutical and cosmeceutical applications, being cultivated and appreciated in several countries such as Brazil, Korea, Japan and China. AIM OF THE STUDY: This study aimed to characterize the chemical profile and the potential gastroprotective effect of hydroalcoholic extract from Agaricus blazei Murill (HEAb). MATERIALS AND METHODS: The extract was chemically characterized by elemental analysis, UPLC-QTOF-MSE, Nuclear Magnetic Resonance (NMR) and high-performance liquid chromatography (HPLC) techniques to elucidate the metabolites present in the extract. The quantification of phenolic compounds and the in vitro antioxidant activities were performed and the gastroprotective effect of this extract was evaluated against ethanol-induced gastric ulcer model. HEAb was administered by gavage at 5, 25 and 50 mg kg-1 and N-acetylcysteine at 300 mg kg-1 (positive control). Furthermore, the pathways of nitric oxide (NO), Cyclic Guanylate Monophosphate (cGMP), prostaglandins (PGs) and the involvement of ATP-sensitive K+ Channels were modulated. RESULTS: Mannitol, malic acid, pyroglutamic acid, L-agaritine and L-valine were putatively identified by UPLC-QTOF-MSE in HEAb. In addition, it was possible to identify mannitol by the intense signals in the NMR spectra, being still quantified as the main compound in the extract by HPLC. The contents of total phenols and flavonoids corroborated with the good antioxidant activity of HEAb. This study observed that HEAb at 25 and 50 mg kg-1 had gastroprotection effect demonstrated by the reduction of histopathological parameters and the reduction of mastocytosis in the stomach of mice. CONCLUSIONS: In this study was possible to conclude that HEAb has gastroprotective effect related to the involvement of NO and PG pathways in the ethanol-induced gastric ulcer model in mice.
Assuntos
Agaricus , Antiulcerosos , Úlcera Gástrica , Agaricus/metabolismo , Animais , Antiulcerosos/química , Antiulcerosos/farmacologia , Antiulcerosos/uso terapêutico , Etanol/química , Mucosa Gástrica , Manitol/metabolismo , Manitol/farmacologia , Manitol/uso terapêutico , Camundongos , Óxido Nítrico/metabolismo , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Extratos Vegetais/uso terapêutico , Ratos , Ratos Wistar , Úlcera Gástrica/induzido quimicamente , Úlcera Gástrica/tratamento farmacológico , Úlcera Gástrica/prevenção & controleRESUMO
ABSTRACT Visceral leishmaniasis (VL) is mainly caused by Leishmania (Leishmania) donovani and Leishmania (L.) infantum; however, other Leishmania species have been associated with VL. We report a case of a patient simultaneously diagnosed with VL caused by Leishmania (L.) amazonensis and Hodgkin's lymphoma. After treatment with liposomal amphotericin B and chemotherapy, the patient presented a clinical cure. This case report reinforces the hypothesis that other Leishmania species can cause visceral lesions mainly related to immunosuppression.
RESUMO
Edible mushrooms have been increasingly introduced into the human diet, which has driven research into their functional properties. Thus, Agaricus brasiliensis Murill or Agaricus blazei Murill (ABM) is a species native to the Brazilian biome, whose fruiting body has been used not only for dietary purposes, but also in the development of functional foods or as source of molecules of pharmacological interest. The bioactivity of ABM has been related to the presence of polysaccharides, although the contribution of other metabolites cannot be discharged. This work describes the polysaccharides isolation methodology and preparation of the extracts of ABM and their biological activities. Furthermore, it presents a general outline of its characterizations regarding composition, chemical structure and properties in solution. The ABM and its chemical constituents exhibit several biological activities that support their potential use for prevention or treatment of diseases with inflammatory background, such as cancer, diabetes and atherosclerosis. The mechanism of action of the extracts and polysaccharides from ABM is mainly related to a modulation of immune system response or reduction of inflammatory response. This review shows that the ABM has great potential in the pharmaceutical, biotechnological and food sectors that deserves additional research using standardized products.
Assuntos
Agaricus/metabolismo , Anti-Inflamatórios/farmacologia , Polissacarídeos Fúngicos/farmacologia , Anti-Inflamatórios/química , Anti-Inflamatórios/isolamento & purificação , Brasil , Alimento Funcional , Polissacarídeos Fúngicos/química , Polissacarídeos Fúngicos/isolamento & purificação , HumanosRESUMO
BACKGROUND: Three drugs - pentavalent antimonials, amphotericin B and pentamidine - are currently used for leishmaniasis treatment. They are administered for long periods, only parenterally, and have high cardiac, renal and hepatic toxicities. Therefore, the investigation of new compounds is required. Nitro-heterocyclic derivatives have been used as possible drug candidates to treat diseases caused by trypanosomatids. METHODS: Leishmania (L.) amazonensis promastigotes (MHO/BR/73/M2269), maintained in the Laboratório de Soroepidemiologia - Instituto de Medicina Tropical- USP, were exposed to five nitroheterocyclic derivatives, with differences at phenyl-ring position 4: BSF-C4H9, BSF-H, BSF-NO2, BSF-CH3 and BSF-Cl, for 48 hours. After analyzing viability (MTT assay), we evaluated cellular-morphology activity of compounds by transmission electron microscopy (TEM) and measurement of apoptosis (phosphatidylserine expression) by flow cytometry. RESULTS: EC50 of amphotericin B and BSF-CH3 were 0.50 (M and 0.39 (M respective. Other nitro-heterocyclic compounds presented EC50 higher than amphotericin B. All compounds showed greater AV- and PI-positive expression than amphotericin B at 100 (M, except BSF-NO2. TEM showed complete nuclear disfigurement with 100 (M of BSF-NO2, 25 and 6.25 (M of BSF-H, and 6.25 (M BSF-Cl; presence of vesicles within the flagellar pocket with 25 (M BSF-H; alteration of the kinetoplast with 25 (M BSF-C4H9, 25 (M of BSF-H, 6.25 (M BSF-CH3 and 6.25 (M of BSF-Cl. CONCLUSIONS: Nitro-heterocyclic compounds have shown activity against promastigotes of L. amazonensis, at lower concentrations. However, improvement of compound scaffolds are needed to assist the elucidation of the mechanism of action and to achieve greater activity.
RESUMO
Background:Three drugs - pentavalent antimonials, amphotericin B and pentamidine - are currently used for leishmaniasis treatment. They are administered for long periods, only parenterally, and have high cardiac, renal and hepatic toxicities. Therefore, the investigation of new compounds is required. Nitro-heterocyclic derivatives have been used as possible drug candidates to treat diseases caused by trypanosomatids.Methods:Leishmania (L.) amazonensis promastigotes (MHO/BR/73/M2269), maintained in the Laboratório de Soroepidemiologia - Instituto de Medicina Tropical- USP, were exposed to five nitroheterocyclic derivatives, with differences at phenyl-ring position 4: BSF-C4H9, BSF-H, BSF-NO2, BSF-CH3 and BSF-Cl, for 48 hours. After analyzing viability (MTT assay), we evaluated cellular-morphology activity of compounds by transmission electron microscopy (TEM) and measurement of apoptosis (phosphatidylserine expression) by flow cytometry.Results:EC50 of amphotericin B and BSF-CH3 were 0.50 (M and 0.39 (M respective. Other nitro-heterocyclic compounds presented EC50 higher than amphotericin B. All compounds showed greater AV- and PI-positive expression than amphotericin B at 100 (M, except BSF-NO2. TEM showed complete nuclear disfigurement with 100 (M of BSF-NO2, 25 and 6.25 (M of BSF-H, and 6.25 (M BSF-Cl; presence of vesicles within the flagellar pocket with 25 (M BSF-H; alteration of the kinetoplast with 25 (M BSF-C4H9, 25 (M of BSF-H, 6.25 (M BSF-CH3 and 6.25 (M of BSF-Cl.Conclusions:Nitro-heterocyclic compounds have shown activity against promastigotes of L. amazonensis, at lower concentrations. However, improvement of compound scaffolds are needed to assist the elucidation of the mechanism of action and to achieve greater activity.(AU)
Assuntos
Animais , Camundongos , Leishmaniose/tratamento farmacológico , Leishmania , Nitrocompostos/uso terapêutico , Fosfatidilserinas , Camundongos Endogâmicos BALB C , Citometria de FluxoRESUMO
Abstract Background: Three drugs - pentavalent antimonials, amphotericin B and pentamidine - are currently used for leishmaniasis treatment. They are administered for long periods, only parenterally, and have high cardiac, renal and hepatic toxicities. Therefore, the investigation of new compounds is required. Nitro-heterocyclic derivatives have been used as possible drug candidates to treat diseases caused by trypanosomatids. Methods: Leishmania (L.) amazonensis promastigotes (MHO/BR/73/M2269), maintained in the Laboratório de Soroepidemiologia - Instituto de Medicina Tropical- USP, were exposed to five nitroheterocyclic derivatives, with differences at phenyl-ring position 4: BSF-C4H9, BSF-H, BSF-NO2, BSF-CH3 and BSF-Cl, for 48 hours. After analyzing viability (MTT assay), we evaluated cellular-morphology activity of compounds by transmission electron microscopy (TEM) and measurement of apoptosis (phosphatidylserine expression) by flow cytometry. Results: EC50 of amphotericin B and BSF-CH3 were 0.50 (M and 0.39 (M respective. Other nitro-heterocyclic compounds presented EC50 higher than amphotericin B. All compounds showed greater AV- and PI-positive expression than amphotericin B at 100 (M, except BSF-NO2. TEM showed complete nuclear disfigurement with 100 (M of BSF-NO2, 25 and 6.25 (M of BSF-H, and 6.25 (M BSF-Cl; presence of vesicles within the flagellar pocket with 25 (M BSF-H; alteration of the kinetoplast with 25 (M BSF-C4H9, 25 (M of BSF-H, 6.25 (M BSF-CH3 and 6.25 (M of BSF-Cl. Conclusions: Nitro-heterocyclic compounds have shown activity against promastigotes of L. amazonensis, at lower concentrations. However, improvement of compound scaffolds are needed to assist the elucidation of the mechanism of action and to achieve greater activity.
Assuntos
Cobaias , Leishmaniose/tratamento farmacológico , Compostos HeterocíclicosRESUMO
Antiparasitic photodynamic therapy (ApPDT) is an emerging approach to manage cutaneous leishmaniasis (CL) since no side effects, contraindications and parasite resistance have been reported. In addition, methylene blue (MB) is a suitable photosensitizer to mediate ApPDT on CL. In this study we aimed to look for the best parameters to eradicate Leishmania amazonensis and investigated the cell death pathways involved in MB-mediated ApPDT. MB uptake by parasites was determined using different MB concentrations (50, 100, 250 and 500⯵M) and incubation times (10, 30 and 60â¯min). L. amazonensis promastigotes were cultured and submitted to ApPDT using different concentrations of MB (50, 100 and 250 µM) combined to a red LED emitting at 645⯱â¯10â¯nm. The pre-irradiation time was 10â¯min. Two optical powers (100â¯mW and 250â¯mW) were tested and cells were exposed to 60 and 300 s of MB-mediated ApPDT delivering energies of 6, 15, 30 and 75â¯J and fluences of 21.2, 53.1, 106.2 and 265.4â¯J/cm2, respectively. Following ApPDT, cells were prepared for flow cytometry and transmission electron microscopy to unravel the mechanisms of cell death. Our results showed the lowest MB concentration (50 µM) and the lowest optical power (100â¯mW) promoted the highest percentage of cell decrease. ApPDT caused alterations on cell membrane permeability as well depolarization of mitochondrial membrane potential. We also observed ultrastructural changes of the parasites such as cell shrinkage, intense vacuolization of the cytoplasm, enlargement of mitochondrion-kinetoplast complex, and small blebs on parasite flagella and cell membrane after MB-mediated ApPDT. Taken together, our findings ratify that ApPDT parameters play a pivotal role in cell susceptibility and suggest that apoptosis is involved in parasite death regardless MB-mediated ApPDT protocol
Assuntos
Fotoquimioterapia , Leishmania/citologia , AntiparasitáriosRESUMO
Antiparasitic photodynamic therapy (ApPDT) is an emerging approach to manage cutaneous leishmaniasis (CL) since no side effects, contraindications and parasite resistance have been reported. In addition, methylene blue (MB) is a suitable photosensitizer to mediate ApPDT on CL. In this study we aimed to look for the best parameters to eradicate Leishmania amazonensis and investigated the cell death pathways involved in MB-mediated ApPDT. MB uptake by parasites was determined using different MB concentrations (50, 100, 250 and 500⯵M) and incubation times (10, 30 and 60â¯min). L. amazonensis promastigotes were cultured and submitted to ApPDT using different concentrations of MB (50, 100 and 250 µM) combined to a red LED emitting at 645⯱â¯10â¯nm. The pre-irradiation time was 10â¯min. Two optical powers (100â¯mW and 250â¯mW) were tested and cells were exposed to 60 and 300 s of MB-mediated ApPDT delivering energies of 6, 15, 30 and 75â¯J and fluences of 21.2, 53.1, 106.2 and 265.4â¯J/cm2, respectively. Following ApPDT, cells were prepared for flow cytometry and transmission electron microscopy to unravel the mechanisms of cell death. Our results showed the lowest MB concentration (50 µM) and the lowest optical power (100â¯mW) promoted the highest percentage of cell decrease. ApPDT caused alterations on cell membrane permeability as well depolarization of mitochondrial membrane potential. We also observed ultrastructural changes of the parasites such as cell shrinkage, intense vacuolization of the cytoplasm, enlargement of mitochondrion-kinetoplast complex, and small blebs on parasite flagella and cell membrane after MB-mediated ApPDT. Taken together, our findings ratify that ApPDT parameters play a pivotal role in cell susceptibility and suggest that apoptosis is involved in parasite death regardless MB-mediated ApPDT protocol.
Assuntos
Leishmania/efeitos dos fármacos , Azul de Metileno/farmacologia , Fotoquimioterapia/métodos , Fármacos Fotossensibilizantes/farmacologia , Morte Celular/efeitos dos fármacos , Permeabilidade da Membrana Celular/efeitos dos fármacos , Relação Dose-Resposta a Droga , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Fatores de TempoRESUMO
Pope Francis' Encyclical Laudato Si', albeit not explicitly, has drawn attention worldwide to the access to medicines as a fundamental human right, as it raises awareness about the current situation of the world and the poor. The reflections set forward by the Encyclical Laudato Si' bring us to the intersections between trade and health care, and how to correctly frame the need for innovation, affordable and accessible health technologies to those in need and how to reach the poorest of the poor. The issues of how to provide access, promote innovation, stimulate reasonable competitive market forces and ensure viable supply are central to the question of how to address Universal Human Rights. Also in this context, intellectual property has gained particular significance with increased attention to new essential medicines for the treatment of diseases of global incidence, including communicable and non-communicable diseases. This article intends to bring elements for a reflection on the debate on universal access to medicines.
A Encíclica Laudato Si' do Papa Francisco, ainda que não explicitamente, chamou a atenção mundial para o acesso aos medicamentos como um direito humano fundamental, quando conscientiza sobre a situação atual do mundo e dos pobres. As reflexões propostas pela Encíclica Laudato Si' nos trazem as interseções entre o comércio e a saúde, como enquadrar corretamente a necessidade de ter tecnologias de saúde inovadoras, acessíveis aos necessitados e como alcançar os mais pobres dos pobres. As questões sobre maneiras de fornecer acesso, promover inovação, estimular forças de mercado competitivas razoáveis e assegurar fornecimento viável são centrais para a questão de como abordar os Direitos Humanos Universais. Também neste contexto, a propriedade intelectual ganhou particular importância com maior atenção a novos medicamentos essenciais para o tratamento de doenças de incidência global, tanto as transmissíveis como as não transmissíveis. Este artigo pretende trazer elementos de reflexão para o debate sobre o acesso universal a medicamentos.
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Introdução: Pessoas com esquizofrenia habitualmente têm um funcionamento social empobrecido e são sedentárias. A participação social, especialmente a inclusão no universo do trabalho, pode interferir positivamente na vida dessas pessoas, reduzindo o sedentarismo e melhorando sua saúde. Objetivo: Avaliar o perfil lipídico e os marcadores da função endotelial de pessoas com esquizofrenia participantes de um programa de emprego apoiado. Método: Pesquisa quantitativa do tipo quase-experimental que avaliou um grupo de 14 sujeitos com esquizofrenia participantes de um programa de inclusão laboral. Os sujeitos foram avaliados antes de ingressarem no programa (momento 1) e um ano depois (momento 2). Foram dosados: colesterol total e frações, triglicerídeos, nitritos e nitratos séricos (marcadores da função endotelial). Os dados foram analisados com o auxílio do software SPSS 20. Resultados: As frações de colesterol high density lipoprotein (HDL-C) e low density lipoprotein (LDL-C) sofreram modificações significativas após o período de um ano de inserção no mercado de trabalho. O HDL aumentou de 82,30 para 98,60 mg/dL (p<0,01). Já o LDL apresentou uma redução de 54,50 para 44,45 mg/dL (p<0,02). Os triglicerídeos e o colesterol total mantiveram-se estáveis. Com relação aos nitritos e nitratos, houve diminuição significativa de 15,20 para 14,48 µmol (p<0,01). Discussão: A participação no programa de emprego apoiado pode ter influenciado positivamente no perfil lipídico dos sujeitos e em sua função endotelial. Além disso, os nitritos também têm sido apontados como mediadores do processo inflamatório neural e sua diminuição está associada à melhora no prognóstico de doenças crônicas como a esquizofrenia
Background: The social function of individuals with schizophrenia is usually poor and this population exhibits a sedentary lifestyle. Social participation, inclusion in the world of work in particular, might favorably interfere with the lives of these individuals by reducing sedentarism and improving their state of health. Objective: To analyze the lipid profile and endothelial function markers among individuals with schizophrenia enrolled in a supported employment program. Methods: Quantitative quasi-experimental study conducted with 14 individuals with schizophrenia enrolled in a labor inclusion program. Participants were assessed before enrolment (time-point 1) and one year later (time-point 2). Total cholesterol and fractions, triglycerides, serum nitrates and nitrites (endothelial function markers) were measured. The data were analyzed with software SPSS 20. Results: The high-density lipoprotein (HDL) and low-density lipoprotein (LDL) levels exhibited significant changes one year after inclusion in the labor market. HDL increased from 82.30 to 98.60 mg/dL (p<0.01) and LDL decreased from 54.50 to 44.45 mg/dL (p<0.02). The triglyceride and total cholesterol levels remained stable. The nitrate and nitrite level exhibited significant reduction from 15.20 to 14.48 µMol (p<0.01). Conclusion: Participation in the supported employment program might have favorably influenced the participants' lipid profile and endothelial function. Nitrites have been described as mediators in the neural inflammatory process, and reduction of their levels is associated with better prognosis of chronic diseases such as schizophrenia.
Assuntos
Humanos , Esquizofrenia , Trabalho , Colesterol , Endotélio , Metabolismo dos LipídeosRESUMO
BACKGROUND: The social function of individuals with schizophrenia is usually poor and this population exhibits a sedentary lifestyle. Social participation, inclusion in the world of work in particular, might favorably interfere with the lives of these individuals by reducing sedentarism and improving their state of health. OBJECTIVE: To analyze the lipid profile and endothelial function markers among individuals with schizophrenia enrolled in a supported employment program. METHODS: Quantitative quasi-experimental study conducted with 14 individuals with schizophrenia enrolled in a labor inclusion program. Participants were assessed before enrolment (time-point 1) and one year later (time-point 2). Total cholesterol and fractions, triglycerides, serum nitrates and nitrites (endothelial function markers) were measured. The data were analyzed with software SPSS 20. RESULTS: The high-density lipoprotein (HDL) and low-density lipoprotein (LDL) levels exhibited significant changes one year after inclusion in the labor market. HDL increased from 82.30 to 98.60 mg/dL (p<0.01) and LDL decreased from 54.50 to 44.45 mg/dL (p<0.02). The triglyceride and total cholesterol levels remained stable. The nitrate and nitrite level exhibited significant reduction from 15.20 to 14.48 µMol (p<0.01). CONCLUSION: Participation in the supported employment program might have favorably influenced the participants' lipid profile and endothelial function. Nitrites have been described as mediators in the neural inflammatory process, and reduction of their levels is associated with better prognosis of chronic diseases such as schizophrenia.
INTRODUÇÃO: Pessoas com esquizofrenia habitualmente têm um funcionamento social empobrecido e são sedentárias. A participação social, especialmente a inclusão no universo do trabalho, pode interferir positivamente na vida dessas pessoas, reduzindo o sedentarismo e melhorando sua saúde. OBJETIVO: Avaliar o perfil lipídico e os marcadores da função endotelial de pessoas com esquizofrenia participantes de um programa de emprego apoiado. MÉTODO: Pesquisa quantitativa do tipo quase-experimental que avaliou um grupo de 14 sujeitos com esquizofrenia participantes de um programa de inclusão laboral. Os sujeitos foram avaliados antes de ingressarem no programa (momento 1) e um ano depois (momento 2). Foram dosados: colesterol total e frações, triglicerídeos, nitritos e nitratos séricos (marcadores da função endotelial). Os dados foram analisados com o auxílio do software SPSS 20. RESULTADOS: As frações de colesterol high density lipoprotein (HDL-C) e low density lipoprotein (LDL-C) sofreram modificações significativas após o período de um ano de inserção no mercado de trabalho. O HDL aumentou de 82,30 para 98,60 mg/dL (p<0,01). Já o LDL apresentou uma redução de 54,50 para 44,45 mg/dL (p<0,02). Os triglicerídeos e o colesterol total mantiveram-se estáveis. Com relação aos nitritos e nitratos, houve diminuição significativa de 15,20 para 14,48 µmol (p<0,01). DISCUSSÃO: A participação no programa de emprego apoiado pode ter influenciado positivamente no perfil lipídico dos sujeitos e em sua função endotelial. Além disso, os nitritos também têm sido apontados como mediadores do processo inflamatório neural e sua diminuição está associada à melhora no prognóstico de doenças crônicas como a esquizofrenia.
RESUMO
lntrodução: a estrongiloidíase tem grande importância médica devido à capacidade de o Strongyloides stercoralis completar seu ciclo de vida no homem e gerar a síndrome de hiperinfecção principalmente em imunocomprometidos. Devido à dificuldade em estruturar a resposta Th2, os pacientes infectados com o Vírus Linfotrópico de Células T Humanas Tipo 1 (HTLV-1) têm maior tendência a apresentar infecção maciça. A leishmaniose visceral, doença relevante em países em desenvolvimento, causa alterações imunológicas semelhantes, porém há poucos relatos de suscetibilidade específica ao Strongyloides stercoralis nos infectados por Leishmania sp. O presente trabalho tem objetivo de relatar um caso de coinfecção HTLV e calazar, que apresentou-se como pancreatite aguda e enteropatia perdedora de proteínas secundárias à estrongiloidíase maciça. Relato de caso: trata-se de um paciente de 34 anos com história de leishmaniose prévia que deu entrada no nosso Serviço com pancreatite aguda idiopática leve, além de história de diarreia crônica há um ano com anasarca e hipoalbuminemia associadas. Apresentou endoscopia digestiva alta com atrofia duodenal importante, tendo sido identificados Strongyloides stercoralis em biópsia, além de sorologia para HTLV positiva. Apresentou translocação bacteriana com sepse grave de foco abdominal, após início do tratamento com ivermectina, tendo posteriormente evoluído com melhora clínica importante e remissão dos sintomas. Fez investigação com punção de medula óssea, em que foram identificadas as formas amastigotas da leishmania. Discussão e conclusão: a presença de HLTV é um fator de risco para a síndrome de hiperinfecção por Strongyloides stercoralis, tendo predisposto o paciente às manifestações graves e raras descritas. A identificação de leishmania na medula óssea, entretanto, é um fator de risco ainda pouco conhecido para estrongiloidíase disseminada, porém com plausibilidade biológica por afetar o sistema imunológico do hospedeiro.(AU)
Introduction: strongyloidiasis has great medical importance because of the ability of the Strongyloides stercoralis to complete its life cycle in man and cause hyperinfection syndrome especially in immunocompromised hosts. Because of the difficulty in triggering The response, Human T-cell lymphotropic virus type 1 (HTLV-1) infected patients has susceptibility for massive infection. Visceral leishmaniasis, a relevant disease in developing countries, causes similar immunological changes, but there are few reports of specific susceptibility to Strongyloides stercoralis on infected by Leishmania sp. This study aimed to report a case of HTLV and kala azar coinfection, presenting as acute pancreatitis and protein losing enteropathy secondary to massive strongyloidiasis. Case report: a 34-year-old patient previously treated for leishmaniasis has presented at our service with idiopathic acute pancreatitis and chronic diarrhea for one year with anasarca and hypoalbuminemia. Upper endoscopy revealed duodenal atrophy in which biopsy identified Strongyloides stercoralis, and HLTV serology was positive. He presented with bacterial translocation and severe sepsis after first dose of ivermectin, but has clinical improvement and remission of symptoms afterwards. Bone marrow aspiration identified amastigote forms of Leishmania. Discussion and Conclusion: the presence of HLTV is a risk factor for Strongyloides stercoralis hyperinfection, and predisposed this patient to the serious and rare events described. The identification of Leishmania in bone marrow, however, is an poorly known risk factor for disseminated strongyloidiasis, but with biological plausibility because it affects the immune system of the host.(AU)
Assuntos
Humanos , Masculino , Adulto , Pancreatite , Enteropatias Perdedoras de Proteínas , Estrongiloidíase , Vírus Linfotrópico T Tipo 1 Humano , Leishmaniose Visceral , Pancreatite Necrosante AgudaRESUMO
Many studies have reported that medicinal plant extracts can inhibit oral pathogen growth or adhesion to surfaces and therefore reduce dental caries formation. The addition of these extracts to oral products like mouthwashes and dentifrices is considered an important strategy in caries control. In this sense, we have developed a Mikania glomerata extract with high ent-kaurenoic acid content (KAMg). So, this work describes the preparation of such extract and the development of a validated HPLC-DAD method to determine its ent-kaurenoic acid (KA) content. Herein it is also described the KAMg in vitro antibacterial evaluation against several cariogenic bacteria in comparison with KA and the investigation of further aspects of the KAMg activity. Toxicological aspects of the developed extract were evaluated by assessing its cytotoxicity and genotoxicity. KA and a KA-rich extract like KAMg showed to inhibit the growth of microorganisms responsible for dental caries at relatively low MIC (Minimum inhibitory concentration) values, albeit not as low as the MIC value obtained for chlorhexidine digluconate (CHD), the golden anticariogenic standard approved by the American Dental Association Council on Dental Therapeutics. However, KAMg was more effective to inhibit the formation of a Streptococcus mutans biofilm with four times lower MICB50 (minimum inhibitory concentration that reduces 50% of the biofilm) value as compared with CHD. Taking into account all these data and considering the absence of genotoxic and cytotoxic activity under the tested conditions, it is suggested that KAMg is a natural product to be considered as active ingredient in oral care products.
Assuntos
Antibacterianos/farmacologia , Biofilmes/efeitos dos fármacos , Diterpenos/farmacologia , Mikania/química , Streptococcus mutans/efeitos dos fármacos , Animais , Cárie Dentária/microbiologia , Masculino , Camundongos , Testes de Sensibilidade Microbiana , Componentes Aéreos da Planta/química , Extratos Vegetais/farmacologia , Testes de ToxicidadeRESUMO
Leishmaniasis is an overlooked tropical disease affecting approximately 1 million people in several countries. Clinical manifestation depends on the interaction between Leishmania and the host's immune response. Currently available treatment options for leishmaniasis are limited and induce severe side effects. In this research, we tested nitro-heterocyclic compounds (BSF series) as a new alternative against Leishmania. Its activity was measured in Leishmania (Leishmania) infantum promastigotes and intracellular amastigotes using MTT colorimetric assay. Additionally, we assessed the phosphatidylserine exposure by promastigotes, measured by flow cytometry, as well as nitric oxide production, measured by Griess' method. The nitro-heterocyclic compounds (BSF series) showed activity against L. (L.) infantum promastigotes, inducting the phosphatidylserine exposition by promastigotes, decreasing intracellular amastigotes and increasing oxide nitric production. The selectivity index was more prominent to Leishmania than to macrophages. Compared to amphotericin b, our compounds presented higher IC50, however the selectivity index was more specific to parasite than to amphotericin b. In conclusion, these nitro-heterocyclic compounds showed to be promising as an anti-Leishmania drug, in in vitro studies