Cardioprotective Effects of Aloysia polystachya Essential Oil on a Rat Model with Multiple Cardiovascular Risk Factors.

Traditional medicine is a frequently utilized method to treat cardiovascular disease and its primary risk factors, including hypertension and dyslipidemia. Aloysia polystachya is a species that is commonly employed to treat various pathological conditions, and it has already been identified as having some cardioprotective effects. This study aimed to investigate the protective effects of the essential oil extracted from the leaves of A. polystachya in a rat model that simulates multiple cardiovascular risk factors. We evaluate the acute toxicity, as well as the cardioprotective effects, by giving different doses of A. polystachya essential oil (1.47 mg/kg, 4.40 mg/kg, and 13.20 mg/kg) over a period of 42 days. The control group was treated with rosuvastatin (5 mg/kg). At the end of the treatments, the renal function, electrocardiography, blood pressure, vascular reactivity, serum biochemical profile, and organ histopathology were evaluated. The main compounds identified in the essential oil of A. polystachya using gas chromatography coupled with mass spectrometry were beta-myrcene (1.08%), limonene (40.13%), and carvone (56.47%). The essential oil of A. polystachya not only lacks acute toxicity but also mitigates the reduction in the excretion of sodium, chloride, and creatinine in urine. Furthermore, it reduces electrocardiographic abnormalities and decreases blood pressure levels. Moreover, this treatment prevents an elevation in markers of inflammation and oxidative stress in the bloodstream. Our findings indicate significant cardioprotective effects of the essential oil of A. polystachya against multiple risk factors for cardiovascular diseases in hypertensive rats.

Interspecies and Intrastrain Interplay among Leishmania spp. Parasites.

Leishmania parasites present astonishing adaptative abilities that represent a matter of life or death within disparate environments during the heteroxenous parasite life cycle. From an evolutionary perspective, organisms develop methods of overcoming such challenges. Strategies that extend beyond the genetic diversity have been discussed and include variability between parasite cells during the infections of their hosts. The occurrence of Leishmania subpopulation fluctuations with variable structural genomic contents demonstrates that a single strain might shelter the variability required to overcome inconsistent environments. Such intrastrain variability provides parasites with an extraordinary ability to adapt and thus survive and propagate. However, different perspectives on this evolution have been proposed. Strains or species living in the same environment can cooperate but also compete. These interactions might increase the replication rate of some parasites but cause the loss of more aggressive competitors for others. Adaptive responses to intra- and interspecific competition can evolve as a fixed strategy (replication is adapted to the average genetic complexity of infections) or an optional strategy (replication varies according to the genetic complexity of the current infection). This review highlights the complexity of interspecies and intrastrain interactions among Leishmania parasites as well as the different factors that influence this interplay.

A New Approach for the Development of Multiple Cardiovascular Risk Factors in Two Rat Models of Hypertension.

Cardiovascular disease (CVD) is the leading cause of death among non-communicable diseases. There is a lack of valid animal models that mimic associations among multiple cardiovascular risk factors in humans. The present study developed an animal model that uses multiple cardiovascular risk factors-namely, hypertension, hypothyroidism, and a high-fat diet (HFD). Two models of hypertension were used: renovascular hypertension (two-kidney, one clip [2K1C]) and spontaneously hypertensive rats (SHRs). The naive group was composed of normotensive rats. Twelve weeks after surgery to induce renovascular hypertension, rats in the 2K1C and SHR groups underwent thyroidectomy. The HFD was then implemented for 6 weeks. Renal function, serum redox status, biochemical CVD markers, electrocardiographic profile, blood pressure, mesenteric vascular bed reactivity, histopathology, and morphometry were investigated. Both experimental models induced dyslipidemia, renal function impairment, and hepatic steatosis, accompanied by higher levels of different inflammatory markers and serum oxidative stress. These alterations contributed to end-organ damage in all hypertensive rats. Our findings corroborate a viable alternative model that involves multiple cardiovascular risk factors and resembles conditions that are seen in humans. Both models mimicked CVD, but our data show that SHRs exhibit more significant pathophysiological changes.

Small conductance calcium-activated potassium channels and nitric oxide/cGMP pathway mediate cardioprotective effects of Croton urucurana Baill. In hypertensive rats.

ETHNOPHARMACOLOGICAL RELEVANCE: Croton urucurana Baill. (Euphorbiaceae), popularly known as 'sangue de dragão' is a Brazilian species widely used in traditional medicine for cardiovascular ailments. AIM: To investigate the cardiovascular effects of the C. urucurana extract in spontaneously hypertensive rats (SHRs). MATERIALS AND METHODS: Leaves from C. urucurana were collected and morphoanatomically characterized. The ethanol-soluble fraction (ESCU) was obtained and analyzed by LC-DAD-MS. Using female Wistar rats we investigated the acute toxicity of ESCU. Then, SHRs (six months old) received vehicle, hydrochlorothiazide (25 mg/kg), or ESCU (30, 100, 300 mg/kg) for 28 days. At the beginning and at the end of treatments, urine samples were obtained to assess renal function. At the end of the trial period, the blood pressure, mesenteric vascular beds (MVBs) reactivity, and electrocardiographic profile were evaluated. Serum angiotensin-converting enzyme activity, as well as urea, creatinine, sodium, potassium, nitrite, malondialdehyde, nitrotyrosine, and aldosterone levels were determined. Relative organ weights and histopathological analysis were performed. Finally, the cardiac function on a Langendorff system, as well as the molecular mechanisms involved in the vasodilator effects of ESCU in MVBs were also investigated. RESULTS: The compounds annotated from ESCU by LC-DAD-MS included mainly phenylpropanoid derivatives, alkaloids, O-glycosylated megastigmanes, glycosylated flavonoids, flavan-3-ols, and others, such as quercetin O-deoxyhexosyl-hexoside, magnoflorine, reticuline, and taspine. None of the animals showed any signs of toxicity. Male SHRs treated only with the vehicle showed important cardiovascular changes, including a reduction in renal function, increase in serum oxidative stress, and hemodynamic, electrocardiographic, and morphological changes typical of hypertensive disease. Moreover, parameters of cardiac function, including left ventricular developed pressure, peak rate of contraction, peak rate of relaxation, and the rate pressure product were significantly altered, showing a significant impairment of ventricular function. All ESCU-doses presented a significant cardioprotective effect in SHRs rats. The 28-day treatment normalized the hemodynamic, electrocardiographic, morphological, and renal impairments, as well as reversed the changes in ventricular function induced by hypertension. In MVBs with an intact endothelium, ESCU (0.1, 0.3, and 1 mg) dose-dependently induced vasodilation. Endothelium removal or the inhibition of nitric oxide synthase prevented the vasodilatory effect of ESCU. Perfusion with a physiological saline solution that contained KCl, tetraethylammonium, or apamin also abolished the vasodilatory effect of ESCU. CONCLUSION: Prolonged ESCU-treatment showed significant cardioprotective effects in SHRs. Moreover, the data showed the role of nitric oxide and calcium-activated small conductance potassium channels in the cardiovascular effects of ESCU.

Tumor de sistema nervoso central e o paciente pediátrico: alterações fonoaudiológicas / Central nervous system tumor and the pediatric patient: speech-language alterations / Tumor del sistema nervioso central y el paciente pediátrico: trastornosdelhabla y ellenguaje

Introdução: Os tumores do sistema nervoso central (SNC) constituem a segunda neoplasia mais frequente na criança. Os distúrbios tratados pela equipe de fonoaudiologia mais observados em pacientes com tumores são: disfagia, disfonia, alterações de linguagem, transtorno da articulação temporomandibular, disacusia, disartria e paralisia facial. A detecção precoce de alterações fonoaudiológicas em pacientes com tumores pediátricos, na fase do diagnóstico ou início do tratamento, é essencial para um manejo terapêutico mais adequado. Objetivo: descrever as alterações fonoaudiológicas de pacientes pediátricos com diagnóstico de tumor de sistema nervoso central em atendimento durante internação hospitalar. Método: Estudo retrospectivo, com coleta realizada através da pesquisa de dados extraídos de prontuário eletrônico, com dados dos pacientes internados de março de 2016 a agosto de 2018. Para avaliar a associação entre as variáveis categóricas, o teste Qui-quadrado de Pearson foi aplicado. O nível de significância adotado foi de 5% (p<0,05). Resultados: Verificou-se maior relevância nos dados relacionados aos distúrbios de deglutição e motricidade orofacial. Observou-se significância estatística na variável local da lesão - em fossa posterior -, com presença de alterações fonoaudiológicas. Conclusão: A amostra de pacientes oncológicos pediátricos demonstrou alterações fonoaudiológicas, principalmente nas áreas de disfagia e de motricidade orofacial.

Introduction: Central nervous system (CNS) tumors are the second most frequent neoplasm in children. The disorders treated by the speech therapy team most observed in patients with tumors are: dysphagia, dysphonia, language disorders, temporomandibular joint disorder, dysacusis, dysarthria and facial paralysis. Early detection of speech-language pathology changes in patients with pediatric tumors, at the stage of diagnosis or initiation of treatment, is essential for a more appropriate therapeutic management. Objective: to describe speech disorders in pediatric patients diagnosed with a tumor of the central nervous system in care during hospitalization. Method: Retrospective study, with collection performed through the research of data extracted from electronic medical records, with data of patients hospitalized from March 2016 to August 2018. To evaluate the association between categorical variables, Pearson's Chi-square test was applied. The level of significance adopted was 5% (p <0.05). Results: There was greater relevance in the data related to swallowing disorders and orofacial motricity. Statistical significance was observed in the local variable of the lesion - in the posterior fossa -, with the presence of speech-language disorders. Conclusion: The sample of pediatric cancer patients demonstrated speechlanguage disorders, especially in the areas of dysphagia and orofacial motricity.

Introducción: Los tumores del sistema nervioso central (SNC) son la segunda neoplasia maligna más frecuente em niños. Los trastornos tratados por el equipo de terapia del habla más observados en pacientes con tumores son: disfagia, disfonía, transtornos del lenguaje, trastorno de la articulación temporomandibular, disacusis, disartria y parálisis facial. La detección temprana de los câmbios em la patologia del habla y el linguaje en pacientes con tumores pediátricos, em la etapa de diagnóstico o inicio del tratamiento, es esencial para un manejo terapéutico más adecuado. Objetivo: describir los transtornos del habla y el lenguaje de los pacientes pediátricos diagnosticados con tumor del sistema nervioso central em la atención durante la hospitalización. Método: Estudio retrospectivo, com recopilación realizada a través de la investigación de datos extraídos de registros médicos electrónicos, com datos de pacientes hospitalizados de marzo de 2016 a agosto de 2018. Para evaluar la asociación entre variables categóricas, se aplico la prueba de Chi-cuadrado de Pearson. El nivel de significancia adoptado fue del 5% (p<0,05). Resultados: Hubo mayor relevância em los datos relacionados com los trastornos de la deglución y la motricidad orofacial. Se observo importancia estadística em la variable local de la lesión, em la fosa posterior, com la presencia de alteraciones de la patologia del habla y el lenguaje. Conclusión: La muestra de pacientes com cáncer pediátrico demostró la presencia de transtornos del habla y el lenguaje, especialmente em las áreas de disfagia y motricidad orofacial.

Drug addiction: self-perception of oral health / Drogadição: Autopercepção em Saúde Bucal / Adicción a las drogas: auto percepción de la salud bucal

Objective: To report the self-perception of substance-abusing individuals who were in a recovery process regarding sociodemographic conditions and general and oral health. Methods: Descriptive cross-sectional study conducted in a recovery center for drug addiction in Alfenas, Minas Gerais, Brazil, in 2015, with 39 men aged over 18 years old. Data were collected using a semi-structured questionnaire that addressed: socioeconomic status, selfperception of general and oral health, access to dental care, relationship with the dentist, and other issues. In order to assess the self-perception of oral health, the variable was dichotomized into "satisfactory" and "unsatisfactory", which refer to what the individual acknowledges as a good or poor condition of oral health, using Fisher's exact test with 5% significance level. Results: Most frequent diseases were depression, 35.90% (n=14), insomnia, 35.9%, (n=14) and recurring headache (23.1%; n=9); however, 61.50% (n=24) of the participants reported not getting sick easily, which contrasts with their self-perception. Regarding oral health, only 30.50% (n=12) of the participants reported brushing their teeth three times a day; 53.80% (n=21) had dentinal hypersensitivity; 41.00% (n=16) had dry mouth and bad breath; 30.80% (n=12) claimed to have bruxism and reported having one or more loose teeth; 28.20% (n=11) reported clenching the teeth in an exaggerated way, and 33.30% (n=13) reported feeling tooth pain. Conclusion: The self-perception of individuals ­ under 30 years old, single, white or mulattos ­ regarding their general health was contradictory, as they rated it as good but have reported depression, insomnia and weight loss; additionally, oral health was considered poor with unsatisfactory conditions, which highlights the harmful effects of substance abuse.

Objetivos: Relatar a autopercepção de indivíduos drogaditos que se encontravam em estágio recuperatório, quanto às condições sociodemográficas, de saúde geral e bucal. Métodos: Estudo descritivo e transversal realizado em 2015 em um centro de triagem de recuperação de dependentes químicos, em Alfenas, MG, Brasil, com 39 internos do sexo masculino e acima de 18 anos. Por meio de um questionário semi-estruturado, investigaram-se temas referentes à condição socioeconômica, percepção dos internos em relação à própria saúde geral e bucal, acesso ao tratamento odontológico, relacionamento com o cirurgião-dentista, entre outros. A variável autopercepção em saúde bucal foi dicotomizada em "satisfatória" e "insatisfatória" para aplicação do teste Exato de Fisher, com nível de significância de 5%. Resultados: As doenças mais frequentes foram depressão, 35,90% (n=14), insônia, 35,9%, (n=14) e dor de cabeça recorrente (23,1%; n=9), apesar de 61,50% (n=24) dos internos afirmarem não ficar doentes, indicando autopercepção conflitante. Ao serem questionados sobre a frequência de escovação diária, apenas 30,50% (n=12) mencionaram três vezes ao dia, 53,80% (n=21) com sensibilidade dentinária; 41,00% (n=16) com sensação de boca seca e mal hálito; 30,80% (n=12) bruxismo, 28,20% (n=11) apertamento dental e 33,30% (n=13) dor em algum dente. Conclusão: A autopercepção dos internos analisados com menos de 30 anos, solteiros, brancos ou mulatos, quanto ao seu estado geral de saúde era contraditória, já que classificaram como boa, mas relataram depressão, insônia e perda de peso; e saúde bucal foi considerada ruim com condições insatisfatórias, que destacam os efeitos nocivos do uso de drogas.

Objetivo: Relatar la auto percepción de individuos drogadictos que estaban en proceso de recuperación, respecto las condiciones socio-demográficas y la salud general y bucal. Métodos: Estudio transversal y descriptivo realizado en un centro de recuperación para drogadicción en Alfenas, Minas Gerais, Brasil, en 2015, com 39 hombres con más de 18 años. Los datos fueron recogidos a través de un cuestionario semiestructurado que investigaba la posición socioeconómica, la auto percepción de la salud general y bucal, El acceso al cuidado dental, la relación con el dentista y otros temas. Para evaluar la auto percepción de la salud bucal la variable fue dividida en "satisfactoria" y "no satisfactoria" la cual refiere a los conocimientos del individuo sobre la buena o mala condición de salud bucal utilizando la prueba de Exacto de Fisher con El 5% de nivel de significancia. Resultados: Las enfermedades más frecuentes fueron la depresión con el 35,90% (n=14), el insomnio con el 35,9%, (n=14) y dolor de cabeza recurrente (23,1%; n=9); sin embargo, el 61,50% (n=24) de los participantes relataron no enfermarse con facilidad lo que contrasta con su auto percepción. Respecto a la salud bucal, solamente el 30,50% (n=12) de los participantes relataron cepillar los dientes tres veces al día; El 53,80% (n=21) tuvieron hipersensibilidad dental; el 41,00% (n=16) tuvieron la sensación de boca seca y mal aliento; El 30,80% (n=12) reclamaron de bruxismo y relataron tener uno o más dientes perdidos; el 28,20% (n=11) relataron apretar los dientes de manera exagerada y el 33,30% (n=13) relataron tener dolor de diente. Conclusión: La auto percepción de los individuos - por abajo de los 30 años, solteros, blancos o mulatos - respecto su salud general fue contradictoria ya que clasificaron como buena aunque reportaron la depresión, el insomnio y La pérdida de peso; además, la salud bucal fue considerada pobre con condiciones no satisfactorias, las cuales resalta los efectos nocivos de la substancia abusiva.

Soluble TNF-like cytokine (TL1A) production by immune complexes stimulated monocytes in rheumatoid arthritis.

TNF-like cytokine (TL1A) is a newly identified member of the TNF superfamily of ligands that is important for T cell costimulation and Th1 polarization. However, despite increasing information about its functions, very little is known about expression of TL1A in normal or pathological states. In this study, we report that mononuclear phagocytes appear to be a major source of TL1A in rheumatoid arthritis (RA), as revealed by their strong TL1A expression in either synovial fluids or synovial tissue of rheumatoid factor (RF)-seropositive RA patients, but not RF-/RA patients. Accordingly, in vitro experiments revealed that human monocytes express and release significant amounts of soluble TL1A when stimulated with insoluble immune complexes (IC), polyethylene glycol precipitates from the serum of RF+/RA patients, or with insoluble ICs purified from RA synovial fluids. Monocyte-derived soluble TL1A was biologically active as determined by its capacity to induce apoptosis of the human erythroleukemic cell line TF-1, as well as to cooperate with IL-12 and IL-18 in inducing the production of IFN-gamma by CD4(+) T cells. Because RA is a chronic inflammatory disease with autoimmune etiology, in which ICs, autoantibodies (including RF), and various cytokines contribute to its pathology, our data suggest that TL1A could be involved in its pathogenesis and contribute to the severity of RA disease that is typical of RF+/RA patients.