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1.
Mar Drugs ; 21(9)2023 Aug 27.
Artículo en Inglés | MEDLINE | ID: mdl-37755085

RESUMEN

(1) Background: Microalgae are promising feedstock for obtaining valuable bioactive compounds. To facilitate the release of these important biomolecules from microalgae, effective cell disruption is usually necessary, where the use of ultrasound has achieved considerable popularity as an alternative to conventional methods. (2) Methods: This paper aims to evaluate the use of ultrasound technology in water medium as a green technology to recover high added-value compounds from Dunaliella salina and improve its sensory profile towards a high level of incorporation into novel food products. (3) Results: Among the variables, the solid concentration and extraction time have the most significant impact on the process. For the extraction of protein, or fat, the most influential factor is the extraction time. Total polyphenols are only significantly affected by the extraction time. The antioxidant capacity is strongly affected by the solid to liquid ratio and, to a small extent, by the extraction time. Ultrasound-assisted extraction improves the overall odor/aroma of D. salina with good acceptability by the panelists. (4) Conclusions: The application of ultrasonic-assisted extraction demonstrates a positive overall effect on enhancing the sensory profile, particularly the odor of microalgal biomass, while the bioactive properties are preserved. Notably, the intense sea/fish odors are reduced, while earthy and citrus notes become more prominent, resulting in an improved overall sensory profile score. This is the first time, to our knowledge, that this innovative, green, and efficient technology has been used to upgrade the aroma profile of microalgae.

2.
BMC Med Educ ; 23(1): 761, 2023 Oct 12.
Artículo en Inglés | MEDLINE | ID: mdl-37828485

RESUMEN

BACKGROUND: Life expectancy in recent decades has increased the prevalence of chronic diseases in the population, requiring an approach to new health topics, such as discussions on quality of life and expectations about death and dying. The concept of advance directives (ADs) gives individuals the opportunity to make known their decisions about the treatments they would like to receive at the end of life. Despite the recognition of relevance in clinical practice, the applicability of the concept presents challenges, including establishing the appropriate prognosis for each patient and the ideal time to approach the patient. Some prognostic tools were developed, such as the surprise question (SQ): "Would you be surprised if your patient died in 12 months?", which is used in some clinical settings to predict patient deaths and to make decisions regarding ADs. The main objective of the present study was to evaluate the behavior of second-year resident physicians (PGY-2) when the SQ was applied. METHOD: In our observational study, from July 1, 2016, to February 28, 2017, (PGY-2) in the Internal Medicine Residency Program (IMRP) applied SQ to all patients with multiple and varied chronic no communicable comorbidities, who were followed up at the general medicine outpatient clinic (GMOC) of a tertiary university hospital in São Paulo- Brazil. The frequency of the outcome (death or non-death within 12 months) was analyzed by correlating it with the clinical data (impact of the studied variables). RESULTS: Eight hundred forty patients entered the study. Fitfty-two of them (6.2%) died within one year. PGY-2 predicted that two hundred and fourteen patients (25.5% of total) would die within a year (answer No to SQ), of which, 32 (14.9%) did so. The correct residents' prognosis for the subgroup of 626 patients (answer "Yes" to SQ) was NPV = 96.8% (CI = 95.4%-98.2%) and PPV = 14.9% (CI 10.1%-19, 6%). Answering "Yes" to SQ correlated negatively to addressing AD while the outcomes death and the answer No to SQ were positively correlated, according to the number of comorbidities. CONCLUSION: The SQ, in addition to care, contributed to health education, communication and care planning shared by the doctor and patient.


Asunto(s)
Pacientes Ambulatorios , Cuidados Paliativos , Humanos , Pronóstico , Calidad de Vida , Estudios Prospectivos , Brasil/epidemiología
3.
Microb Pathog ; 161(Pt A): 105255, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-34678459

RESUMEN

Streptococcus agalactiae (group B Streptococcus, GBS) is a pathobiont, a member of human microbiota that can change from commensal to pathogen, causing a large spectrum of diseases. This study assessed virulence determinants of 32 GBS isolates recovered from different clinical sources associated with asymptomatic and symptomatic clinical outcomes that present distinct capsular types and antimicrobial resistance profiles. The ability of a unique strain to colonize and cause infection in different subjects was also evaluated. By PFGE analysis, it was observed that a given strain could be associated with both asymptomatic and symptomatic outcomes. Cell wall anchor proteins ß and alpha C encoding genes (bac and bca, respectively) were detected in all capsular type Ib isolates. bca was more frequent among asymptomatic outcome-related isolates, as well as high expression of ß-hemolysin/cytolysin (ß-H/C). Symptomatic outcome-related isolates produced strong biofilm more frequently. All bacterial isolates recovered from urine were strong biofilm producers. In growth experiments, asymptomatic outcome-related isolates grew faster after 2 h until the end of the log phase. Taken together, these findings show virulence genotypic and phenotypic features of GBS from distinct sources, which may be helpful to understand their pathogenic potential and predict different clinical outcomes.


Asunto(s)
Infecciones Estreptocócicas , Streptococcus agalactiae , Antibacterianos , Biopelículas , Humanos , Streptococcus agalactiae/genética , Virulencia , Factores de Virulencia/genética
4.
J Appl Microbiol ; 130(6): 1925-1934, 2021 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-33128257

RESUMEN

AIM: The purpose of this study was to evaluate the antifungal activity and toxicological parameters of 8-hydroxyquinoline derivatives PH151 and PH153 using alternative animal models, to understand their behaviour when subjected to in vivo experiments. METHODS AND RESULTS: We used Toll-deficient Drosophila melanogaster to test the protective effect of compounds against Candida albicans infection. Toxicological parameters were investigated in chicken and zebrafish embryos. PH151 and PH153 showed low toxicity and the treated flies with these compounds had a significantly higher survival rate than untreated flies after 7 days of infection. The compounds did not cause interruption of chicken embryogenesis. Zebrafish embryos exposed to compounds showed dose-dependent toxicity. CONCLUSIONS: The data supported the potential of PH151 and PH153 for the treatment of systemic candidiasis and demonstrated to be appropriate drug candidates for further studies using mammalian models. SIGNIFICANCE AND IMPACT OF THE STUDY: The increased incidence of Candida infections resistant to antifungals currently available requires acceleration of the discovery of new agents with properties of inhibiting this fungal pathogen. In this study, we have described the antifungal potential and toxicity of two 8-hydroxyquinoline derivatives using in vivo alternative models, and the results confirm their potential to be developed as new drug candidates.


Asunto(s)
Antifúngicos/uso terapéutico , Candidiasis/tratamiento farmacológico , Modelos Animales de Enfermedad , Oxiquinolina/uso terapéutico , Sulfonamidas/uso terapéutico , Animales , Antifúngicos/química , Candida albicans/efectos de los fármacos , Candidiasis/microbiología , Embrión de Pollo , Drosophila melanogaster , Oxiquinolina/química , Sulfonamidas/química , Pez Cebra
5.
Aging Ment Health ; 25(6): 1019-1028, 2021 06.
Artículo en Inglés | MEDLINE | ID: mdl-33089699

RESUMEN

BACKGROUND: Cognitive Stimulation Therapy (CST) is considered a gold-standard, evidence-based and cost-effective approach to improve cognitive function and quality of life of people with mild to moderate dementia. AIMS: To validate CST for the Portuguese population and test its effectiveness. METHODS: A single-blind, multi-center, randomized controlled trial recruited 112 older people with dementia. The primary outcome measure was cognition and secondary measures were quality of life, communication, autonomy, anxiety, depression, and global functioning. We also explored whether CST benefits people differently according to context, gender and level of cognitive reserve. RESULTS: Fifty-five people were randomized to the intervention and 57 to the control group. In the post-test, the intervention group significantly improved relative to controls in cognition (ADAS-Cog, p = 0.013), communication (HCS, p = 0.045), behaviour (CAPE-BRS, p = 0.017) and in global dementia rating (CDR, p = 0.008). Quality of life, depression and anxiety had no significant differences. The estimated number needed to treat was four for one to benefit a cognitive improvement (ADAS-Cog). CONCLUSIONS: Group CST is valid for the Portuguese population with benefits for people with mild to moderate dementia.


Asunto(s)
Demencia , Calidad de Vida , Anciano , Cognición , Demencia/terapia , Humanos , Portugal , Método Simple Ciego
6.
Chem Biodivers ; 18(6): e2100071, 2021 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-33871171

RESUMEN

The lipid fraction of seeds from different pine species and populations was studied regarding total lipid content, fatty acid profile and vitamin E composition. The investigated seeds contained a high percentage of lipid (13.6 to 31.5 %). Lipid fractions were found to be rich in vitamin E, which varied significantly among species and populations. P. halepensis (Ph-Hn) showed the highest content of vitamin E (256.3 mg/kg of seeds) and the uppermost content of α-tocopherol (44 mg/kg). However, P. halepensis (Ph-Kas) was the richest in γ-tocopherol (204.9 mg/kg). Lipid fractions had a low content of δ-tocopherol (1.2 to 3.6 mg/kg. The highest content of γ-tocotrienol (∼18 %) was determined for P. halepensis (Ph-Dc and Ph-Hn). Thirteen fatty acids were identified by GC-FID with significant variation between the investigated species. The linoleic acid was the major fatty acid followed by oleic acid and palmitic acid. The chemical differentiation among species for the composition of fatty acids and vitamin E was confirmed by PCA. Significant correlations were observed between the content of vitamin E and fatty acids and ecological parameters of P. halepensis populations.


Asunto(s)
Ácidos Grasos/análisis , Lípidos/análisis , Pinus/química , Vitamina E/análisis , Pinus/clasificación , Semillas/química , Túnez
7.
Diabet Med ; 37(10): 1742-1751, 2020 10.
Artículo en Inglés | MEDLINE | ID: mdl-32580244

RESUMEN

AIMS: Depression is more prevalent in people with diabetes, and is associated with worse diabetes outcomes. Depression in diabetes is more treatment resistant, and as underlying mechanisms are unknown, development of more effective treatment strategies is complicated. A biopsychosocial model may improve our understanding of the pathophysiology, and therewith help improving treatment options. METHODS: Diabetes was diagnosed according to American Diabetes Association (ADA) criteria and a current depressive episode according to the International Classification of Diseases (ICD-10), based on the Clinical Interview Schedule Revised (CIS-R). From the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil), we included 455 participants without diabetes with a current depressive episode and 10 900 without either diabetes or a current depressive episode. Furthermore, 2183 participants had diabetes alone and 106 had both diabetes and a current depressive episode. Variable selection was based on their relationship with depression and/or diabetes. Multinomial multivariate logistic regression was used to determine how the models differed between participants with and without diabetes. RESULTS: A current depressive episode in diabetes was related to being older and female, having poorer education, financial problems, experiencing discrimination at work, home and school, higher waist circumference, albumin to creatinine ratio and insulin resistance, and the presence of hypertension and cardiovascular disease. In non-diabetes, a current depressive disorder was related to being female, not being black, low income, psychological and social factors, non-current alcohol use, lower HDL cholesterol, higher insulin resistance and the presence of cardiovascular disease. CONCLUSIONS: A current depressive episode in the presence compared with the absence of diabetes was related more to biological than to psychosocial factors.


Asunto(s)
Trastorno Depresivo/psicología , Diabetes Mellitus/psicología , Adulto , Factores de Edad , Consumo de Bebidas Alcohólicas/epidemiología , Población Negra , Brasil/epidemiología , Enfermedades Cardiovasculares/epidemiología , Estudios de Casos y Controles , HDL-Colesterol/sangre , Creatinina/sangre , Escolaridad , Femenino , Estrés Financiero , Humanos , Renta , Resistencia a la Insulina , Modelos Logísticos , Masculino , Persona de Mediana Edad , Modelos Biopsicosociales , Análisis Multivariante , Albúmina Sérica , Factores Sexuales , Discriminación Social , Circunferencia de la Cintura
8.
Cryo Letters ; 41(1): 6-12, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33973978

RESUMEN

BACKGROUND: Epididymal sperm cryopreservation represents the ultimate option to preserve spermatozoa of valuable stallions. OBJECTIVE: The study aims to evalute whether single layer centrifugation (SLC) prior to cryopreservation or after post-thawing improves the quality of stallion epididymal sperm. MATERIALS AND METHODS: Epididymal sperms of stallions were harvested (N=20). Sperm samples were subjected to treatments: conventional centrifugation, SLC prior to cryopreservation (SLC-PC) or SLC post-thaw (SLC+). All samples were cryopreserved, thawed and evaluated. SLC+ were thawed, single layer cenrifuged and resuspended in freezing extender (SLC+F) or cooling extender (SLC+C). Total motility, progressive motility, morphology, mitochondrial functionality, membrane integrity and DNA integrity were evaluated. RESULTS: SLC-PC and SLC+F yielded higher total motility, while SLC+F yielded the highest progressive motility. Mitochondrial functionality was significantly higher in all SLC groups. Membrane integrity was higher in SLC-PC. The percentage of morphologically normal spermatozoa was higher in SLC-PC and SLC+F. CONCLUSION: SLC prior to cryopreservation or post-thaw improves the quality of stallion epididymal spermatozoa. When SLC is performed post-thaw, freezing extender is the best medium to resuspend the pelleted semen.


Asunto(s)
Centrifugación , Criopreservación , Preservación de Semen , Animales , Criopreservación/veterinaria , Caballos , Masculino , Mejoramiento de la Calidad , Preservación de Semen/veterinaria , Motilidad Espermática , Espermatozoides
9.
Molecules ; 26(1)2020 Dec 31.
Artículo en Inglés | MEDLINE | ID: mdl-33396530

RESUMEN

Food innovation is moving rapidly and comprises new categories of food products and/or ingredients with a natural and ecological origin. Monocultivar olive pomaces, individually or combined, can be a source of natural bioactive compounds suitable for food or cosmetic applications. This work aimed to assess the phenolics content and antioxidant activity of four monocultivar olive pomaces (Arbosana, Koroneiki, Oliana, and Arbequina) and forty-nine blends prepared with different proportions of each. Additive, synergistic, and antagonistic effects were studied. Among the monocultivar pomaces, Koroneiki and Arbosana were the richest in total phenolics (~15 mg gallic acid eq./g). Most of the interactions found in the blends were additive or synergistic, while very few antagonistic effects were observed. The best results were obtained for those blends where the Koroneiki variety predominated: (i) 90% Koroneiki, 4.75% Oliana, 3.75% Arbequina, 1.5% Arbosana; (ii) 65% Koroneiki, 29% Oliana, 3.25% Arbequina, 2.75% Arbosana; and (iii) 85% Koroneiki, 8.75% Arbequina, 3.5% Arbosana, 2.75% Oliana. In sum, these combinations can be advantageous in comparison to the individual use of monocultivar pomaces, presenting a higher potential to be used as functional ingredients or for bioactive compounds extraction, having in view the obtention of natural preservatives or food/cosmetic formula enhancers.


Asunto(s)
Antioxidantes/farmacología , Interacciones Farmacológicas , Sinergismo Farmacológico , Olea/química , Fenoles/análisis , Extractos Vegetales/farmacología , Antioxidantes/análisis , Antioxidantes/química , Extractos Vegetales/análisis , Extractos Vegetales/química
10.
Ceska Gynekol ; 85(2): 124-130, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32527107

RESUMEN

OBJECTIVE: The aim of this article is to present a summary of the actual diagnostic possibilities and differentiation of MODY (Maturity-Onset Diabetes of the Young) from gestational diabetes (GDM) found during routine screening, and specific aspects of care and treatment of MODY during pregnancy and early postpartum period. DESIGN: Rewiev. SETTINGS: Centre for Research of Diabetes, Metabolism and Nutrition; Second Department of Internal Medicine University Hospital Královské Vinohrady and Third Faculty of Medicine, Prague. Department of Internal Medicine, Second Faculty of Medicine, Charles University, Prague. METHODS: Recent publications selected in PubMed with the key words MODY, gestational diabetes. RESULTS: Many patients with MODY, especially the glucokinase MODY, can be first diagnosed during pregnancy. It is estimated that MODY patients account for up to 5% of GDM cases found in routine screening of GDM. MODY should be considered in lean women around 25 years of age, with a positive family history of diabetes in one of the parents. The differentiation of MODY from GDM is of particular importance not only for the different management and goals of antidiabetic therapy and planning ultrasound controls of fetal growth during pregnancy, but also because of the risk of hyperinsulinemic hypoglycemia in newborns. CONCLUSION: Recognition of MODY during pregnancy and adherence to existing recommendations concerning specific care of these patients is essential for the optimal course of their pregnancy and proper care of the newborn in the early postpartum period.


Asunto(s)
Diabetes Mellitus Tipo 2/diagnóstico , Diabetes Mellitus Tipo 2/genética , Diabetes Gestacional/diagnóstico , Glucoquinasa/genética , Embarazo en Diabéticas/diagnóstico , Embarazo en Diabéticas/genética , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Diabetes Gestacional/tratamiento farmacológico , Diabetes Gestacional/genética , Femenino , Humanos , Hipoglucemiantes/uso terapéutico , Recién Nacido , Insulina/uso terapéutico , Mutación , Periodo Posparto , Embarazo , Resultado del Embarazo , Embarazo en Diabéticas/tratamiento farmacológico , Embarazo en Diabéticas/terapia , Resultado del Tratamiento
11.
Clin Exp Immunol ; 196(3): 374-382, 2019 06.
Artículo en Inglés | MEDLINE | ID: mdl-30697694

RESUMEN

Infective endocarditis (IE) is the cardiac disease with the highest rates of mortality. New biomarkers that are able to identify patients at risk for death are required to improve patient management and outcome. This study aims to investigate if cytokines, chemokines and growth factors measured at IE diagnosis can predict mortality. Patients with definite IE, according to the Duke's modified criteria, were included. Using high-performance Luminex assay, 27 different cytokines, chemokines and growth factors were analyzed. Machine learning techniques were used for the prediction of death and subsequently creating a decision tree, in which the cytokines, chemokines and growth factors were analyzed together with C-reactive protein (CRP). Sixty-nine patients were included, 41 (59%) male, median age 54 [interquartile range (IQR) = 41-65 years] and median time between onset of the symptoms and diagnosis was 12 days (IQR = 5-30 days). The in-hospital mortality was 26% (n = 18). Proinflammatory cytokines interkeukin (IL)-15 and C-C motif chemokine ligand (CCL4) were found to predict death, adding value to CRP levels. The decision tree predicted correctly the outcome of 91% of the patients at hospital admission. The high-risk group, defined as CRP ≥ 72 mg/dL, IL-15 ≥ 5·6 fg/ml and CCL4 ≥ 6·35 fg/ml had an 88% in-hospital mortality rate, whereas the patients classified as low-risk had a mortality rate of 8% (P = < 0·001). Cytokines IL-15 and CCL4 were predictors of mortality in IE, adding prognostic value beyond that provided by CRP levels. Assessment of cytokines has potential value for clinical risk stratification and monitoring in IE patients.


Asunto(s)
Quimiocina CCL4/metabolismo , Endocarditis/diagnóstico , Interleucina-15/metabolismo , Adulto , Anciano , Biomarcadores/metabolismo , Proteína C-Reactiva/metabolismo , Toma de Decisiones Asistida por Computador , Endocarditis/inmunología , Endocarditis/mortalidad , Femenino , Mortalidad Hospitalaria , Humanos , Aprendizaje Automático , Masculino , Persona de Mediana Edad , Pronóstico , Factores de Riesgo
13.
Med Vet Entomol ; 33(3): 397-406, 2019 09.
Artículo en Inglés | MEDLINE | ID: mdl-30887540

RESUMEN

New species of insect-specific viruses (ISV) have been reported worldwide. In the present study, the complete genome of Culex flavivirus (CxFV) and partial sequences of other ISVs in Culex quinquefasciatus Say 1823 females (n = 3425) sampled in 200 urban areas census tracts of Cuiaba, state of Mato Grosso, were identified via reverse transcriptase-polymerase chain reaction for a NS5 region of flaviviruses, nucleotide and high-throughput sequencing, and viral isolation in C6/36 cells. CxFV was detected in 16 of 403 mosquito pools; sequences found in the study presented a high similarity with isolates from São Paulo, Brazil and other countries in Latin American that belong to genotype II, supporting the geographical influence on CxFV evolution. The monthly maximum likelihood estimation for CxFV ranged from 1.81 to 9.94 per 1000 mosquitoes. In addition to the CxFV complete genome, one pool contained an ORF1 sequence (756 bp) that belongs to a novel Negevirus from the Sandewavirus supergroup most similar to the Santana virus (77.1%) and another pool presented an RNA-dependent RNA polymerase sequence (1081 bp) of a novel Rhabdovirus most similar to Wuhan mosquito virus 9 (44%). After three passages in C6/36 cells, only CxFV was isolated from these co-infected pools. The importance of ISVs relies on their possible ability to interfere with arbovirus replication in competent vectors.


Asunto(s)
Culex/virología , Flavivirus/genética , Genoma Viral , Animales , Brasil , Femenino , Flavivirus/clasificación , Flavivirus/aislamiento & purificación , Genotipo , Filogenia
14.
Acta Virol ; 63(3): 292-300, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31507195

RESUMEN

Dengue, considered the most important arthropod-borne viral disease affecting humans, is transmitted by the bite of mosquitoes of the genus Aedes and caused by one of the four distinct serotypes of dengue virus (DENV-1, -2, -3 and -4). Infection with one of the four serotypes provides lifelong homotypic immunity. However, immunity against the heterologous serotypes is transient. As a consequence, secondary infection may lead to severer manifestations due to cross-reactivity of antibodies and T-cells. Over 500,000 people are hospitalized every year and around 2,5 million, living in endemic areas, are at risk of infection. Given the background, the development of vaccines and anti-DENV drugs is of the utmost importance, as is the characterization of an animal model for testing them. The purpose of this study was to investigate ultrastructural alterations caused by DENV secondary infection in BALB/c mice heart. To achieve our goal, six BALB/c mice were infected with DENV-1 and, 4 months later, reinfected with DENV-2. Uninfected mice were used as negative controls. Heart samples were collected and processed for ultrastructural and histopathological analysis. Our results showed edema, endothelium activation characterized by the presence of transport vesicles, free platelets in interstitium, mitochondria presenting rarefied matrix and degenerated cristae, and disorganization of muscle fibers. These results point not only to BALB/c mice susceptibility to DENV infection, but also to the fact that, although it is not an often reported occurrence, dengue can lead to heart damage. Keywords: dengue; experimental model; reinfection; BALB/c mice.


Asunto(s)
Coinfección , Virus del Dengue , Dengue , Miocardio , Animales , Dengue/patología , Dengue/virología , Modelos Animales de Enfermedad , Corazón/virología , Ratones , Ratones Endogámicos BALB C , Miocardio/patología
15.
Environ Res ; 162: 297-307, 2018 04.
Artículo en Inglés | MEDLINE | ID: mdl-29407761

RESUMEN

Sea urchin represents one of the most valuable seafood product being harvested and explored for their edible part, the gonads or roe. This species is generally considered a sentinel organism for ecotoxicological studies being widely used in monitoring programs to assess coastal aquatic environments quality, because is directly exposed to anthropogenic contaminants in their habitat. In this context, the aim of this study is to evaluate the concentrations of macro (Cl, K, P, Ca, S) and trace (Zn, Br, Fe, Sr, I, Se, Rb, Cu, Cr, Ni, As, iAs, Cd, Pb, Hg) elements in Paracentrotus lividus gonads from three South West Atlantic production areas subjected to distinct environmental and anthropogenic pressures. In all studied areas, the elements profile in sea urchin gonads was Cl > K > P > Ca > S > Zn > Br > Fe > Sr > I > Rb > Cu > Se > Cr > Ni, suggesting an element guide profile with special interest for sea urchin farming development. Concerning toxic elements, the profile was the following: As > Cd > Pb > Hg > iAs. The results evidenced higher levels of Pb and Hg in open areas. Distinct area characteristics and anthropogenic pressures of production areas evidence the importance of biomonitoring contaminants, particularly toxic elements. In general, the levels of these elements were below maximum levels in foodstuffs (MLs) which pose a minimal health risk to consumers.


Asunto(s)
Gónadas , Paracentrotus , Oligoelementos , Animales , Monitoreo del Ambiente , Gónadas/química , Paracentrotus/química , Oligoelementos/análisis
16.
Clin Exp Immunol ; 190(1): 122-132, 2017 10.
Artículo en Inglés | MEDLINE | ID: mdl-28543170

RESUMEN

Cardiomyopathy is the most severe outcome of Chagas disease, causing more than 12 000 deaths/year. Immune cells participate in cardiomyopathy development either by direct tissue destruction, or by driving inflammation. We have shown that CD4- CD8- [double-negative (DN)] T cells are major sources of inflammatory and anti-inflammatory cytokines, associated with the cardiac (CARD) and indeterminate (IND) forms of Chagas disease, respectively. Here, we sought to identify Trypanosoma cruzi-derived components that lead to activation of DN T cells in Chagas patients. Glycolipid (GCL), lipid (LIP) and protein-enriched (PRO) fractions derived from trypomastigote forms of T. cruzi were utilized to stimulate cells from IND and CARD patients to determine DN T cell activation by evaluating CD69 and cytokine expression. We observed that GCL, but not LIP or PRO fractions, induced higher activation of DN T cells, especially T cell receptor (TCR)-γδ DN T, from IND and CARD. GCL led to an increase in tumour necrosis factor (TNF) and interleukin (IL)-10 expression by TCR-γδ DN T cells from IND, while inducing IFN-γ expression by TCR-γδ DN T cells from CARD. This led to an increase in the ratio IFN-γ/IL-10 in TCR-γδ DN T cells from CARD, favouring an inflammatory profile. These results identify GCL as the major T. cruzi component responsible for activation of DN T cells in chronic Chagas disease, associated predominantly with an inflammatory profile in CARD, but not IND. These findings may have implications for designing new strategies of control or prevention of Chagas disease cardiomyopathy by modulating the response to GCL.


Asunto(s)
Antígenos de Protozoos/inmunología , Cardiomiopatías/inmunología , Enfermedad de Chagas/inmunología , Glucolípidos/inmunología , Inflamación/inmunología , Linfocitos T/inmunología , Trypanosoma cruzi/inmunología , Adulto , Anciano , Antígenos CD4/metabolismo , Antígenos CD8/metabolismo , Diferenciación Celular , Células Cultivadas , Citocinas/metabolismo , Progresión de la Enfermedad , Femenino , Humanos , Mediadores de Inflamación/metabolismo , Activación de Linfocitos , Masculino , Persona de Mediana Edad , Receptores de Antígenos de Linfocitos T gamma-delta/metabolismo , Linfocitos T/microbiología
17.
Genet Mol Res ; 16(3)2017 Sep 21.
Artículo en Inglés | MEDLINE | ID: mdl-28973725

RESUMEN

With the objective of characterizing Canine parvovirus (CPV) from some suspected fecal samples of dogs collected from the Veterinarian Hospital in Belém city, five positive samples were found by PCR assay and an update molecular characterization was provided of the CPV-2 circulation in Belém. Through sequencing of the complete DNA sequences (NS1, NS2, VP1, and VP2 genes), the CPV-2 strain was identified as CPV-2b (Asn426Asp) circulating in Belém. The CPV-2b strain with a different change at the position Tyr324Leu was detected in all samples assessed and thus reported for the first time for the scientific community. Phylogenetic analysis indicated that Belém CPV-2b and CPV-2a strains would be related to a cluster with samples after the 1990s, suggesting that CPV-2b in Belém originated from CPV-2a circulating in Brazil after the 1990s. Potential recombination events were analyzed using RDP4 and SplitsTree4; therefore, results suggest that CPV-2 sequences here described were not potentially recombination events. Continuous monitoring and molecular characterization of CPV-2 samples are needed not only to identify possible genetic and antigenic changes that may interfere with the effectiveness of vaccines but also to bring a better understanding of the mechanisms that drive the evolution of CPV-2 in Brazil.


Asunto(s)
Genoma Viral , Parvovirus Canino/genética , Polimorfismo Genético , Animales , Brasil , Perros/virología , Heces/virología , Infecciones por Parvoviridae/veterinaria , Infecciones por Parvoviridae/virología , Parvovirus Canino/clasificación , Parvovirus Canino/aislamiento & purificación , Filogenia , Recombinación Genética
18.
J Food Sci Technol ; 54(13): 4344-4352, 2017 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-29184240

RESUMEN

Most studies evaluating the use of essential oils (EO) as antibacterial agents focus mainly on minimal inhibitory concentrations (MIC) rather than minimal bactericidal concentrations (MBC). In this work, we compared MICs and MBCs of EO from condiment plants commonly used in Mediterranean Europe, namely Origanum vulgare, Salvia lavandulaefolia, Salvia officinalis, Salvia sclarea and Rosmarinus officinalis, aiming to evaluate their application as disinfecting agents in minimally processed produce. Outbreaks-related pathogens such as Listeria monocytogenes, Pseudomonas aeruginosa and Yarrowia lipolytica were used. Results showed that all EO were able to reduce bacterial growth in all bacterial strains tested, particularly O. vulgare. However, fewer EO exhibited bactericidal activities, and were only effective against one or two bacterial strains, hence eliminating the possibility to use them as broad range disinfectants. Furthermore, the necessary concentrations were too high for food application. Hence, our work suggests the need to evaluate MBC rather than MIC and questions EO usefulness in controlling undesired microorganisms. Overall, and despite the large volume of data published on EO, results obtained were not very encouraging for a realistic application on produce and question the viability of EOs as disinfecting agents in food.

19.
Clin Genet ; 89(4): 501-506, 2016 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-26497935

RESUMEN

SHORT syndrome has historically been defined by its acronym: short stature (S), hyperextensibility of joints and/or inguinal hernia (H), ocular depression (O), Rieger abnormality (R) and teething delay (T). More recently several research groups have identified PIK3R1 mutations as responsible for SHORT syndrome. Knowledge of the molecular etiology of SHORT syndrome has permitted a reassessment of the clinical phenotype. The detailed phenotypes of 32 individuals with SHORT syndrome and PIK3R1 mutation, including eight newly ascertained individuals, were studied to fully define the syndrome and the indications for PIK3R1 testing. The major features described in the SHORT acronym were not universally seen and only half (52%) had four or more of the classic features. The commonly observed clinical features of SHORT syndrome seen in the cohort included intrauterine growth restriction (IUGR) <10th percentile, postnatal growth restriction, lipoatrophy and the characteristic facial gestalt. Anterior chamber defects and insulin resistance or diabetes were also observed but were not as prevalent. The less specific, or minor features of SHORT syndrome include teething delay, thin wrinkled skin, speech delay, sensorineural deafness, hyperextensibility of joints and inguinal hernia. Given the high risk of diabetes mellitus, regular monitoring of glucose metabolism is warranted. An echocardiogram, ophthalmological and hearing assessments are also recommended.

20.
Eur J Cancer Care (Engl) ; 25(6): 921-935, 2016 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-26374619

RESUMEN

Cancer-related fatigue (CRF) is the most stressful and prevalent symptom in paediatric oncology patients. This integrative review aimed to identify, analyse and synthesise the evidence of non-pharmacological intervention studies to manage fatigue and psychological stress in a paediatric population with cancer. Eight electronic databases were used for the search: PubMed, Web of Science, CINAHL, LILACS, EMBASE, SCOPUS, PsycINFO and the Cochrane Library. Initially, 273 articles were found; after the exclusion of repeated articles, reading of the titles, abstracts and the full articles, a final sample of nine articles was obtained. The articles were grouped into five categories: physical exercise, healing touch, music therapy, therapeutic massage, nursing interventions and health education. Among the nine studies, six showed statistical significance regarding the fatigue and/or stress levels, showing that the use of the interventions led to symptoms decrease. The most frequently tested intervention was programmed physical exercises. It is suggested that these interventions are complementary to conventional treatment and that their use can indicate an improvement in CRF and psychological stress.


Asunto(s)
Fatiga/terapia , Neoplasias/complicaciones , Estrés Psicológico/terapia , Adolescente , Niño , Preescolar , Métodos Epidemiológicos , Fatiga/etiología , Humanos , Lactante , Estrés Psicológico/etiología
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