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1.
An Acad Bras Cienc ; 95(1): e20201338, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37222357

RESUMEN

The aim of this study was to evaluate the effect of the bodying agents (erythritol, sorbitol, xylitol, and polydextrose) and their mixtures on the preparation of mixed Brazilian Cerrado fruit preserves (marolo, soursop, and sweet passion fruit). Mixture design was used for product optimization and the preserves were evaluated by texture profile, stress relaxation test, and uniaxial compression test. The research data were analyzed using regression equations on SAS software. The results indicated that the rheological parameters were affected by the body agents. Erythritol should not be used as an isolated component because it provoked changes in the properties of the final product (harder and brittle preserves); xylitol and sorbitol made preserves more elastic, cohesive, and more fragile; and polydextrose showed a synergistic effect with erythritol for rupture deformation and lesser effects for hardness, adhesiveness, and gumminess.


Asunto(s)
Frutas , Xilitol , Brasil , Sorbitol , Eritritol
2.
Front Microbiol ; 11: 990, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32528438

RESUMEN

The emergence of bacterial strains resistant to different antibiotics has prompted the search for new sources of antimicrobial compounds. Studies have shown that jambolan [Syzygium cumini (L.) Skeels], a tropical fruit from the Mirtaceae family, contains a great variety of phytochemical compounds with high antioxidant and antimicrobial activity. This study aimed to determine the centesimal composition and physicochemical characteristics of the pulp and seed of S. cumini (L.) Skeels, as well as the content of total phenolic compounds and the antioxidant, antibacterial, antibiofilm and anti-quorum sensing (QS) activities of the phenolic extracts obtained from the pulp and the seeds of this fruit. The in vitro antibacterial and anti-QS activities of active films incorporating phenolic extracts were also evaluated. Additionally, we performed molecular docking of phenolic compounds present in jambolan with the CviR QS regulator of Chromobacterium violaceum. The composition and physicochemical characteristics of the samples presented similar values to those found for the species. However, the seed phenolic extract had a higher content of phenolic compounds and antioxidant activity than the pulp. Both phenolic extracts presented antibacterial activity against Aeromonas hydrophila, C. violaceum, Escherichia coli, Pseudomonas aeruginosa, Salmonella enterica serovar Typhimurium, Serratia marcescens, Listeria monocytogenes, and Staphylococcus aureus. The seed phenolic extract was particularly inhibitory against S. aureus. The pulp phenolic extract inhibited swarming motility and biofilm formation of A. hydrophila, E. coli, and S. marcescens in sub-MIC concentrations. The pulp and seed phenolic extracts inhibited violacein production in C. violaceum. Films incorporating both phenolic extracts inhibited the growth of bacteria, particularly Pseudomonas fluorescens, L. monocytogenes, and S. aureus, as well as QS in C. violaceum. Molecular docking showed that a variety of compounds found in pulp and seed extracts of jambolan, particularly chlorogenic acid and dihydroquercetin, potentially bind CviR protein and may interfere with QS. Our results indicate that pulp and seed of jambolan are good sources of antibacterial, antibiofilm, and anti-QS compounds that can be used in the development of natural preservatives and for application in antibacterial active films.

3.
Front Hum Neurosci ; 10: 334, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-27458360

RESUMEN

Neurofibromatosis type I (NF1) is a neurogenetic disease marked by multiple cognitive and learning problems. Genetic variants may account for phenotypic variance in NF1. Here, we investigated the association between the catechol-O-methyltransferase (COMT) Val(158)Met polymorphism and working memory and arithmetic performance in 50 NF1 individuals. A significant association of the COMT polymorphism was observed only with verbal working memory, as measured by the backward digit-span task with an advantageous performance for Met/Met carriers. To study how genetic modifiers influence NF1 cognitive performance might be of importance to decrease the unpredictability of the cognitive profile among NF1 patients.

4.
Acta Crystallogr E Crystallogr Commun ; 71(Pt 12): o1097-8, 2015 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-26870517

RESUMEN

The formulation that the title compound, C18H18N2O4S2, adopts is a zwitterionic core with the charge separated to the sulfilimine S and N atoms and is supported by the two different S-N bond distances about the sulfinimine N atom [1.594 (2) and 1.631 (2) Å, respectively] that are typical for such bonds. The notably unusual bond is S-N(oxazolidinone) [1.692 (2) Å] that is longer than a typical S-N bond [1.603 (18) Å, Mogul analysis; Macrae et al. (2008 ▸). J. Appl. Cryst. 41, 466-470]. The bond-angle sum about sulfilimine sulfur (308.35°) reflects the trigonal-pyramidal geometry of this atom. Two of the angles are less than 100°. Despite the pyramidalization of this sulfur, there are no significant inter-molecular inter-actions, beyond usual van der Waals contacts, in the crystal packing.

5.
Artículo en Inglés | MEDLINE | ID: mdl-23891730

RESUMEN

Studies suggest that inflammation is involved in the neurodegenerative cascade of dementias. Immunological mechanisms may be part of the pathophysiological process in frontotemporal dementia (FTD), but up till now only vague evidence of such mechanisms has been presented. The B7- CD28/CTLA-4 pathway is an important immunological signaling pathway involved in modulation of T cell activation. The aim of this study was to compare the expression of molecules associated with co-stimulatory signaling in peripheral blood mononuclear cells (PBMC) of FTD to Alzheimer disease (AD) and control groups. Our results confirm the previous demonstrated increased expression of CD80 in CD14+ Alzheimer patients T cells but show, for the first time, a reduction in the expression of CTLA-4 in CD4+ FTD cells. As CTLA-4 is the most potent negative regulators of T-cell activation we speculated that peripheral T lymphocytes in FTD are more activated and this could be involved in the neurodegeneration observed in this dementia.


Asunto(s)
Enfermedad de Alzheimer/patología , Antígeno CTLA-4/metabolismo , Demencia Frontotemporal/patología , Linfocitos T/metabolismo , Antígenos CD/metabolismo , Linfocitos B/metabolismo , Brasil , Femenino , Antígenos HLA-DR/metabolismo , Humanos , Masculino
6.
Ophthalmic Res ; 50(2): 117-22, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-23867343

RESUMEN

PURPOSE: To investigate the association between the CFH and ARMS2 gene polymorphisms and age-related macular degeneration (AMD) in a Brazilian cohort. METHODS: We examined 163 individuals with AMD and 154 controls recruited at the Department of Ophthalmology of the Universidade Federal de Minas Gerais, at the Instituto da Visão, and at the Centro Especializado em Olhos, in Brazil, between 2007 and 2012. Genotyping for CFH rs1061170 and ARMS2 rs10490924 single-nucleotide polymorphisms was performed. The odds ratios (OR) for all of the studied genotypes (heterozygous and homozygous) of both genes were calculated compared to homozygous ancestral alleles. RESULTS: Homozygosity for the CFH and ARMS2 at-risk allele was 33.3 and 23.6%, respectively, for AMD individuals and 10.3 and 7.1%, respectively, for controls (p < 0.0001). The OR was 7.2 (95% CI 3.6-14.5; p < 0.001) for the CFH at-risk genotype (CC) and 5.5 (95% CI 2.6-11.8; p < 0.0001) for ARMS2 (TT). Subjects homozygous for both polymorphisms had a much higher risk of developing AMD (n = 14 patients, OR 33.3, 95% CI 12.8-86.4). The proportion of ancestry in each group indicated that AMD patients had a higher European (Caucasian) component than controls. CONCLUSION: CFH and ARMS2 polymorphisms were strongly associated with AMD in this Brazilian cohort.


Asunto(s)
Degeneración Macular/genética , Polimorfismo de Nucleótido Simple , Proteínas/genética , Anciano , Brasil/epidemiología , Estudios de Cohortes , Factor H de Complemento/genética , Etnicidad/etnología , Femenino , Angiografía con Fluoresceína , Genotipo , Técnicas de Genotipaje , Humanos , Degeneración Macular/diagnóstico , Degeneración Macular/etnología , Masculino , Oportunidad Relativa , Reacción en Cadena en Tiempo Real de la Polimerasa , Tomografía de Coherencia Óptica
7.
Graefes Arch Clin Exp Ophthalmol ; 250(2): 185-9, 2012 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-21881842

RESUMEN

PURPOSE: To investigate the association between VEGF gene polymorphism and age-related macular degeneration (AMD) in a Brazilian cohort. METHODS: We examined 160 affected individuals and 140 sex- and age-matched controls recruited at the Vision Institute and the Retina Department, São Geraldo Hospital, Minas Gerais Federal University, Brazil, between 2007 and 2011. Genotyping for the VEGF rs1413711 single nucleotide polymorphism (SNP) (+674C>T) was performed. The incidence rate ratios and 95% confidence interval (CI) for AMD for this genotype was calculated. The odds ratio (OR) was also assessed by using logistic regression, controlling for CFH and LOC387715 risk genotype. RESULTS: We observed a prevalence of homozygosity (TT genotype) of 18.1% for rs1413711 among AMD cases compared with 5.8% among controls (P < 0.002). The ORs for this polymorphism were 3.6 (95%CI 1.6-8.2) for homozygous subjects and 1.5 (95%CI 1.1-2.1, P < 0.01) if the subject had at least one risk allele. When we studied separately exudative and dry AMD groups, this polymorphism was statistically significant for both groups. Controlling for CFH and LOC387715 risk genotype the OR was 3.0 for VEGF homozygous, and the OR increases if the patient is homozygous for the three genes. CONCLUSION: The present data suggests that VEGF TT genotype is associated with AMD among Brazilian patients.


Asunto(s)
Degeneración Macular/genética , Polimorfismo de Nucleótido Simple , Factor A de Crecimiento Endotelial Vascular/genética , Anciano , Anciano de 80 o más Años , Brasil/epidemiología , Femenino , Predisposición Genética a la Enfermedad , Genotipo , Homocigoto , Humanos , Incidencia , Degeneración Macular/epidemiología , Masculino , Persona de Mediana Edad , Oportunidad Relativa , Prevalencia , Reacción en Cadena en Tiempo Real de la Polimerasa
8.
Psychiatr Genet ; 21(2): 106-11, 2011 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-21085052

RESUMEN

Frequent comorbidity between panic disorder (PD) and mood disorders has been widely reported in clinical and epidemiological studies and, recently, an increasing attention has been paid to the cooccurrence of PD and bipolar disorder (BD). Several studies have shown that an imbalance of serotonin activity could be related to panic symptoms. Tryptophan hydroxylase 2 (TPH2) are plausible candidates for the association with PD. The aim of this study is to investigate a possible association between TPH2 gene polymorphisms and the PD comorbidity susceptibility.Our sample consisted of 515 patients; 274 patients with BD (subtypes I and II), including 45 patients with lifetime panic disorder comorbidity and 241 controls. These patients were genotyped for eight tagging single nucleotide polymorphisms of the gene of human TPH2. We found significant differences between patients with BD, with panic disorder comorbidity, and controls in the allelic analysis (rs4448731, P=0.0069; rs4565946, P=0.0359; rs4760820, P=0.0079; rs1487275, P=0.0439) and genotypic analysis (rs4448731, P=0.011; rs4760820, P=0.0259). We also identified significant differences between patients with BD, with and without panic disorder comorbidity in the allelic analysis (rs4448731, P=0.004; rs4565946, P=0.011; rs11179000, P=0.031; rs4760820, P=0.018; rs1487275, P=0.038; rs10879357, P=0.023) and genotypic analysis (rs4448731, P=0.004; rs4565946, P=0.010; rs4760820, P=0.023; rs10879357, P=0.052). The haplotype analysis in the group of patients with BD, with and without panic disorder comorbidity, was also significant (rs4448731-rs4565946, P=0.0190; rs4448731-rs4565946, P=0.0220; rs10506645-rs4760820, P=0.0360). Further studies are needed to replicate the positive association that we observed.


Asunto(s)
Trastorno Bipolar/epidemiología , Trastorno Bipolar/genética , Predisposición Genética a la Enfermedad , Trastorno de Pánico/epidemiología , Trastorno de Pánico/genética , Polimorfismo de Nucleótido Simple/genética , Triptófano Hidroxilasa/genética , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Trastorno Bipolar/enzimología , Brasil/epidemiología , Comorbilidad , Femenino , Frecuencia de los Genes/genética , Haplotipos/genética , Humanos , Masculino , Persona de Mediana Edad , Trastorno de Pánico/enzimología , Adulto Joven
9.
Rev Bras Fisioter ; 14(2): 175-81, 2010.
Artículo en Inglés, Portugués | MEDLINE | ID: mdl-20464161

RESUMEN

BACKGROUND: Cervical range of motion (CROM) is a fundamental component of the functional evaluation in physical therapy interventions. The CROM device stands out as a reliable, non-invasive and easy-to-use method, but it is a very expensive tool. In clinical practice, more affordable tools such as Fleximeters are preferred. However, the reliability of Fleximeters for the cervical spine has not been adequately tested. OBJECTIVES: To compare the Fleximeters and the CROM device for the analysis of CROM, and to investigate the intra- and inter-examiner reliability of both tools. METHODS: Cervical movements (flexion, extension, lateral flexion and rotation) were assessed in 20 asymptomatic young women by three examiners using both tools. The statistical analyses were performed using the intra-class correlation coefficient (ICC). RESULTS: The agreement between the tools was considered moderate for flexion and left rotation (0.71; 0.58) and excellent for all of the other movements (0.76-0.87). The intra-examiner reliability for the CROM device was moderate for flexion and right rotation (0.70; 0.69) and excellent for all of the other movements (0.79-0.88). For the Fleximeter, the agreement was excellent for inclination and right rotation (0.80; 0.77) and moderate for all of the other movements (0.69-0.75). The inter-examiner reliability for the CROM device was excellent for all movements (0.76-0.93) and for the Fleximeter, it was moderate for right and left rotation (0.66; 0.75) and excellent for all of the other movements (0.81-0.88). CONCLUSIONS: There was agreement between the CROM assessments using the Fleximeter and the CROM device. Furthermore, both devices showed acceptable reliability for clinical practice.


Asunto(s)
Vértebras Cervicales/fisiología , Rango del Movimiento Articular , Femenino , Humanos , Variaciones Dependientes del Observador , Examen Físico/métodos , Examen Físico/estadística & datos numéricos , Reproducibilidad de los Resultados , Adulto Joven
10.
Braz. j. phys. ther. (Impr.) ; 14(2): 175-181, Mar.-Apr. 2010. ilus, tab
Artículo en Inglés, Portugués | LILACS | ID: lil-549362

RESUMEN

CONTEXTUALIZAÇÃO: A amplitude de movimento (ADM) cervical é fundamental na avaliação funcional e na intervenção fisioterapêutica. O Cervical Range of Motion (CROM) destaca-se por ser um método confiável, não invasivo e de fácil manuseio, porém de alto custo. Na prática clínica, opta-se por aparelhos mais acessíveis, como o Flexímetro, cuja confiabilidade ainda não foi adequadamente testada para o segmento cervical. OBJETIVOS: Comparar o Flexímetro com o CROM na análise da ADM cervical e verificar a confiabilidade intra e interexaminadores de ambas as ferramentas. MÉTODOS: Os movimentos cervicais de flexão, extensão, inclinação lateral e rotação foram mensurados, com ambas as ferramentas, por três examinadores em 20 indivíduos jovens, do sexo feminino, assintomáticos. A análise estatística foi realizada pelo Coeficiente de Correlação Intraclasse (ICC). RESULTADOS: A concordância entre as ferramentas foi considerada moderada nos movimentos de flexão e rotação esquerda (0,71;0,58) e excelente nos demais movimentos (0,76-0,87). A confiabilidade intraexaminadores com o CROM foi moderada para os movimentos de flexão e rotação direita (0,70; 0,69) e excelente para os demais movimentos (0,79-0,88); com o Flexímetro, foi excelente para inclinação e rotação direita (0,80; 0,77) e moderada para os demais movimentos (0,69-0,75). A confiabilidade interexaminadores com o CROM foi excelente em todos os movimentos (0,76-0,93) e, com o Flexímetro, foi moderada para os movimentos de rotação direita e esquerda (0,66; 0,75) e excelente para os demais movimentos (0,81-0,88). CONCLUSÕES: Os valores obtidos na avaliação da ADM cervical feita pelo Flexímetro concordam com aqueles mensurados pelo CROM. Além disso, ambas as ferramentas apresentam confiabilidades aceitáveis para a prática clínica.


BACKGROUND: Cervical range of motion (CROM) is a fundamental component of the functional evaluation in physical therapy interventions. The CROM device stands out as a reliable, non-invasive and easy-to-use method, but it is a very expensive tool. In clinical practice, more affordable tools such as Fleximeters are preferred. However, the reliability of Fleximeters for the cervical spine has not been adequately tested. OBJECTIVES: To compare the Fleximeters and the CROM device for the analysis of CROM, and to investigate the intra- and inter-examiner reliability of both tools. METHODS: Cervical movements (flexion, extension, lateral flexion and rotation) were assessed in 20 asymptomatic young women by three examiners using both tools. The statistical analyses were performed using the intra-class correlation coefficient (ICC). RESULTS: The agreement between the tools was considered moderate for flexion and left rotation (0.71; 0.58) and excellent for all of the other movements (0.76-0.87). The intra-examiner reliability for the CROM device was moderate for flexion and right rotation (0.70; 0.69) and excellent for all of the other movements (0.79-0.88). For the Fleximeter, the agreement was excellent for inclination and right rotation (0.80; 0.77) and moderate for all of the other movements (0.69-0.75). The inter-examiner reliability for the CROM device was excellent for all movements (0.76-0.93) and for the Fleximeter, it was moderate for right and left rotation (0.66; 0.75) and excellent for all of the other movements (0.81-0.88). CONCLUSIONS: There was agreement between the CROM assessments using the Fleximeter and the CROM device. Furthermore, both devices showed acceptable reliability for clinical practice.


Asunto(s)
Femenino , Humanos , Adulto Joven , Vértebras Cervicales/fisiología , Rango del Movimiento Articular , Variaciones Dependientes del Observador , Examen Físico/métodos , Examen Físico/estadística & datos numéricos , Reproducibilidad de los Resultados , Adulto Joven
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