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1.
J Dairy Sci ; 107(6): 3899-3915, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38216037

RESUMEN

Acidogenic boluses can mitigate potential negative effects of high milk yield at dry-off on udder health. This randomized controlled trial aimed to investigate the effect of administering acidogenic boluses at dry-off on dry period intramammary infection (IMI) dynamics and on milk production parameters, somatic cell count linear score (LSCC), clinical mastitis (CM), and herd removal in the next lactation. A total of 901 cows from 3 dairy farms were randomly allocated to a control (CON, n = 458; no administration of acidogenic boluses at dry-off) or treatment group (TRT, n = 443; administration of 2 acidogenic boluses at dry-off). Quarter milk samples were collected at dry-off and after calving and submitted for bacteriological milk culture. The effects of treatment on the presence of quarter-level postpartum IMI, cure of existing IMI, and acquisition of new IMI, and on the prevalence of cow-level high LSCC (LSCC ≥4) in the first 30 days in milk (DIM) were analyzed using mixed effects logistic regression. Mixed linear regression was used to analyze cow-level milk production parameters (i.e., milk yield, fat corrected milk, fat and protein yield, and LSCC) in the first 90 DIM and until 300 DIM. For CM and herd removal, Cox proportional hazard regression models were used. In addition to treatment group, lactation group at dry-off, presence of high LSCC in the last test-day, average milk yield in the week before dry-off, presence of CM in the lactation of enrollment, and biologically relevant interactions were offered in all models. There was no evidence of a difference in IMI dynamics or in milk, fat corrected milk, protein or fat yields in the subsequent lactation between groups. The TRT group had a lower LSCC in the first 2 mo postpartum compared with the CON group (2.58 ± 0.3 vs. 2.92 ± 0.3 and 2.42 ± 0.3 vs. 2.81 ± 0.3, for first and second month postpartum). The prevalence of high LSCC in the first 30 DIM was 9.1% lower in the TRT compared with the CON group (16.3% vs. 25.5%; risk difference: -9.2; 95% confidence interval [CI]: -15.8, -2.5). Cows in the TRT group exhibited reduced hazards of CM in the subsequent lactation compared with cows in the CON group (hazard ratio: 0.75; 95% CI: 0.63, 0.89) as well as a reduced hazard of herd removal (hazard ratio: 0.82, 95% CI: 0.77, 0.88). The administration of acidogenic boluses as a component of dry-off management is a promising approach to maintain good udder health and reduce the hazard of CM and herd removal during the subsequent lactation.


Asunto(s)
Lactancia , Glándulas Mamarias Animales , Mastitis Bovina , Leche , Animales , Bovinos , Femenino , Recuento de Células/veterinaria
2.
Morphologie ; 108(362): 100772, 2024 Mar 08.
Artículo en Inglés | MEDLINE | ID: mdl-38460321

RESUMEN

The permanent left mandibular canines have been used for sexual dimorphism when human identification is necessary. Controversy remains whether the morphology of these teeth is actually useful to distinguish males and females. This study aimed to assess the sexual dimorphism of canines by means of a pioneering artificial intelligence approach to this end. A sample of 13,046 teeth radiographically registered from 5838 males and 7208 females between the ages of 6 and 22.99 years was collected. The images were annotated using Darwin V7 software. DenseNet121 was used and tested based on binary answers regarding the sex (male or female) of the individuals for 17 age categories of one year each (i.e. 6-6.99, 7.7.99… 22.22.99). Accuracy rates, receiver operating characteristic (ROC) curves and confusion matrices were used to quantify and express the artificial intelligence's classification performance. The accuracy rates across age categories were between 57-76% (mean: 68%±5%). The area under the curve (AUC) of the ROC analysis was between 0.58 and 0.77. The best performances were observed around the age of 12 years, while the worst were around the age of 7 years. The morphological analysis of canines for sex estimation should be restricted and allowed in practice only when other sources of dimorphic anatomic features are not available.

3.
Lett Appl Microbiol ; 75(1): 45-50, 2022 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-35342967

RESUMEN

Purpureocillium lilacinum is a filamentous and hyaline fungus cosmopolitan, saprophytic, largely used in the biological control of plant-parasitic nematodes and insects, also considered an emerging and opportunistic human pathogen. The standard treatment for hyalohyphomycosis caused by P. lilacinum is not yet defined, since this fungus is resistant to different antifungals, in vitro and in vivo. The aim of this study was to evaluate and compare in vitro antifungal activity against environmental and clinical P. lilacinum isolates and our results demonstrated that these isolates can be resistant to newer generation triazoles, such as voriconazole, and to caspofungin, a drug of the echinocandin class. In summary, we highlight the importance of knowing the different susceptibility profiles of P. lilacinum isolates, and besides that, the emergence of uncommon human and animal opportunistic fungi, such P. lilacinum, especially during COVID-19, highlight the need for antifungal susceptibility testing of isolates since empirical therapy with different treatment schedules failed in great number of patients.


Asunto(s)
COVID-19 , Hypocreales , Animales , Antifúngicos/farmacología , Equinocandinas/farmacología
4.
Mycopathologia ; 186(3): 411-421, 2021 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-34120275

RESUMEN

Candida yeasts are the most frequent in the vaginal content. This yeast may be a normal microbiota but also causes candidiasis. In symptomatic cases, primary candidiasis (VVC) or recurrence (RVVC) can be considered. This study aims to compare the frequency and in vitro sensitivity profile of Candida species isolated in the vaginal content with the different stages of the presence of yeasts. A total of 258 non-pregnant patients with/without VVC were prospectively screened at a teaching Health Centre of the Faculty of Medicine, in the University of Sao Paulo. The vaginal isolates were identified by traditional and molecular methods. Yeasts were isolated in 160 women. 34% were asymptomatic, 34% with vulvovaginal candidiasis (VVC), and 32% recurrent vulvovaginal candidiasis (RVVC). C. albicans was the most frequent species with 50.1% (82/160), followed by C. parapsilosis 13.7%(22/160), C. glabrata 12.5% (20/160), and C. tropicalis (6.2%). Analysis by the group showed that, in the asymptomatic group, eight yeast species were isolated, C. albicans 44.5% (24/54), C. glabrata 20% (11/54), C. parapsilosis and Rhodotorula rubra being the most frequent. In the VVC group, 11 yeast species were identified. Most isolates were C. albicans 68.5% (37/54), C. tropicalis 7.5% (4/54), and C. parapsilosis 5.5% (3/54). In the RVVC group, ten species were identified, the most frequent being C. albicans 38.5% (20/52), C. parapsilosis 17% (9/52), C. glabrata 4% (8/52), and C. tropicalis 6% (3/52). Less frequent species, such as C. haemulonii and Trichosporon spp, were isolated in the VVC and RVVC groups, C. kefyr was isolated in the three groups studied, and Rhodotorula spp was isolated in the control and RVVC groups. Candida metapsilosis was present in two isolates from the RVVC group. Most isolates were considered sensitive to the tested antifungals. Less sensitivity was seen for caspofungin. In this study, we were able to verify that the most common species of yeasts found in vaginal secretion were isolated in the three groups studied; however, there was the diversity of species in VVC and RVVC. Cryptic species C. haemulonii and were isolated in symptomatic patients. High levels of MICs, some of the antifungals tested, in the control group, draw attention in the group of asymptomatic women. We would like to emphasize that this research aims to assist clinicians and gynecologists, as well as assist in the epidemiological studies of candidiasis, in our country, how to draw attention to the profile of sensitivity/resistance to antifungals.


Asunto(s)
Candidiasis Vulvovaginal , Candidiasis , Antifúngicos/uso terapéutico , Candida albicans , Candidiasis/tratamiento farmacológico , Candidiasis Vulvovaginal/tratamiento farmacológico , Femenino , Humanos , Membrana Mucosa , Rhodotorula
5.
J Digit Imaging ; 33(2): 287-303, 2020 04.
Artículo en Inglés | MEDLINE | ID: mdl-31396778

RESUMEN

A second opinion about cancer stage is crucial when clinicians assess patient treatment progress. Staging is a process that takes into account description, location, characteristics, and possible metastasis of tumors in a patient. It should follow standards, such as the TNM Classification of Malignant Tumors. However, in clinical practice, the implementation of this process can be tedious and error prone. In order to alleviate these problems, we intend to assist radiologists by providing a second opinion in the evaluation of cancer stage. For doing this, we developed a TNM classifier based on semantic annotations, made by radiologists, using the ePAD tool. It transforms the annotations (stored using the AIM format), using axioms and rules, into AIM4-O ontology instances. From then, it automatically calculates the liver TNM cancer stage. The AIM4-O ontology was developed, as part of this work, to represent annotations in the Web Ontology Language (OWL). A dataset of 51 liver radiology reports with staging data, from NCI's Genomic Data Commons (GDC), were used to evaluate our classifier. When compared with the stages attributed by physicians, the classifier stages had a precision of 85.7% and recall of 81.0%. In addition, 3 radiologists from 2 different institutions manually reviewed a random sample of 4 of the 51 records and agreed with the tool staging. AIM4-O was also evaluated with good results. Our classifier can be integrated into AIM aware imaging tools, such as ePAD, to offer a second opinion about staging as part of the cancer treatment workflow.


Asunto(s)
Curaduría de Datos , Neoplasias , Humanos , Hígado , Estadificación de Neoplasias , Neoplasias/diagnóstico por imagen , Semántica
6.
J Appl Microbiol ; 127(1): 237-247, 2019 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-30989772

RESUMEN

AIMS: This study aimed to gather information on farming practices employed in organic lettuce fields in Sao Paulo, Brazil and associate these practices with the microbiological characteristics of the products. METHODS AND RESULTS: Practices were surveyed using a questionnaire applied in ten farms, where 200 heads of lettuce were collected and submitted to enumeration of total coliforms and generic Escherichia coli and tested for Salmonella spp. using culture and molecular (qPCR) methods. Based on the responses, the farms could be clustered in two groups: group 1, comprised by six farms, where chicken manure was used as fertilizer in most of them and the composting process was not performed on site; and group 2, comprised by four farms, where other types of fertilizer were used, and the composting process was performed on site. Generic E. coli was detected in 56 (28%) samples, with an average of 1·1 ± 0·7 log MPN per g. Salmonella DNA was detected in two (1%) samples by qPCR. CONCLUSIONS: The prevalence and bacterial loads of generic E. coli, and the occurrence of Salmonella, even at low populations undetectable by conventional culture methods, highlight the need for control measures during farming practices to reduce microbial contamination and risks of foodborne illnesses. These measures include the use of properly composted manure and appropriate washing procedures for leafy vegetables before consumption. SIGNIFICANCE AND IMPACT OF THE STUDY: The obtained data contribute to a better understanding of the farming practices of organically grown lettuces in Sao Paulo, Brazil.


Asunto(s)
Escherichia coli/aislamiento & purificación , Microbiología de Alimentos , Lactuca/microbiología , Agricultura Orgánica/estadística & datos numéricos , Salmonella/aislamiento & purificación , Brasil , Escherichia coli/genética , Escherichia coli/crecimiento & desarrollo , Granjas , Humanos , Agricultura Orgánica/normas , Salmonella/genética , Salmonella/crecimiento & desarrollo
7.
Biochim Biophys Acta ; 1861(9 Pt A): 970-979, 2016 09.
Artículo en Inglés | MEDLINE | ID: mdl-27233517

RESUMEN

Brown spider phospholipases D from Loxosceles venoms are among the most widely studied toxins since they induce dermonecrosis, triggering inflammatory responses, increase vascular permeability, cause hemolysis, and renal failure. The catalytic (H12 and H47) and metal-ion binding (E32 and D34) residues in Loxosceles intermedia phospholipase D (LiRecDT1) were mutated to understand their roles in the observed activities. All mutants were identified using whole venom serum antibodies and a specific antibody to wild-type LiRecDT1, they were also analyzed by circular dichroism (CD) and differential scanning calorimetry (DSC). The phospholipase D activities of H12A, H47A, H12A-H47A, E32, D34 and E32A-D34A, such as vascular permeability, dermonecrosis, and hemolytic effects were inhibited. The mutant Y228A was equally detrimental to biochemical and biological effects of phospholipase D, suggesting an essential role of this residue in substrate recognition and binding. On the other hand, the mutant C53A-C201A reduced the enzyme's ability to hydrolyze phospholipids and promote dermonecrosis, hemolytic, and vascular effects. These results provide the basis understanding the importance of specific residues in the observed activities and contribute to the design of synthetic and specific inhibitors for Brown spider venom phospholipases D.


Asunto(s)
Dominio Catalítico/genética , Fosfolipasa D/química , Fosfolípidos/química , Venenos de Araña/enzimología , Animales , Araña Reclusa Parda/química , Araña Reclusa Parda/enzimología , Permeabilidad Capilar , Dicroismo Circular , Hemólisis , Mutación , Fosfolipasa D/metabolismo , Fosfolípidos/metabolismo , Hidrolasas Diéster Fosfóricas/química , Venenos de Araña/química
8.
J Appl Microbiol ; 122(2): 450-461, 2017 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-27862685

RESUMEN

AIMS: When skin dysbiosis occurs as a result of skin disorders, probiotics can act as modulators, restoring microbial balance. Several properties of selected probiotics were evaluated so that their topical application could be considered. METHODS AND RESULTS: Adhesion, antimicrobial, quorum sensing and antibiofilm assays were carried out with several probiotic strains and tested against selected skin pathogens. All tested strains displayed significant adhesion to keratin. All lactobacilli with the exception of Lactobacillus delbrueckii, showed antimicrobial activity against skin pathogens, mainly due to organic acid production. Most of them also prevented biofilm formation, but only Propioniferax innocua was able to break down mature biofilms. CONCLUSIONS: This study demonstrates that although all tested probiotics adhered to human keratin, they showed limited ability to prevent adhesion of some potential skin pathogens. Most of the tested probiotics successfully prevented biofilm formation, suggesting that they may be successfully used in the future as a complement to conventional therapies in the treatment of a range of skin disorders. SIGNIFICANCE AND IMPACT OF STUDY: The topically used probiotics may be a natural, targeted treatment approach to several skin disorders and a complement to conventional therapies which present many undesirable side effects.


Asunto(s)
Antiinfecciosos/administración & dosificación , Adhesión Bacteriana , Disbiosis/prevención & control , Lactobacillus , Probióticos/administración & dosificación , Piel/microbiología , Biopelículas/efectos de los fármacos , Humanos , Queratinas/metabolismo , Lactobacillus/clasificación , Percepción de Quorum/efectos de los fármacos , Enfermedades de la Piel/patología
9.
Bioorg Med Chem ; 24(18): 4228-4240, 2016 09 15.
Artículo en Inglés | MEDLINE | ID: mdl-27475533

RESUMEN

In this study, we designed and synthesized a series of thiophen-2-iminothiazolidine derivatives from thiophen-2-thioureic with good anti-Trypanosoma cruzi activity. Several of the final compounds displayed remarkable trypanocidal activity. The ability of the new compounds to inhibit the activity of the enzyme cruzain, the major cysteine protease of T. cruzi, was also explored. The compounds 3b, 4b, 8b and 8c were the most active derivatives against amastigote form, with significant IC50 values between 9.7 and 6.03µM. The 8c derivative showed the highest potency against cruzain (IC50=2.4µM). Molecular docking study showed that this compound can interact with subsites S1 and S2 simultaneously, and the negative values for the theoretical energy binding (Eb=-7.39kcal·mol(-1)) indicates interaction (via dipole-dipole) between the hybridized sulfur sp(3) atom at the thiazolidine ring and Gly66. Finally, the results suggest that the thiophen-2-iminothiazolidines synthesized are important lead compounds for the continuing battle against Chagas disease.


Asunto(s)
Tiazolidinas/farmacología , Tiofenos/farmacología , Tripanocidas/farmacología , Trypanosoma cruzi/efectos de los fármacos , Animales , Línea Celular , Cisteína Endopeptidasas , Inhibidores de Cisteína Proteinasa/síntesis química , Inhibidores de Cisteína Proteinasa/farmacología , Inhibidores de Cisteína Proteinasa/toxicidad , Glicina/química , Ratones , Simulación del Acoplamiento Molecular , Octoxinol , Proteínas Protozoarias/antagonistas & inhibidores , Tiazolidinas/síntesis química , Tiazolidinas/toxicidad , Tiofenos/síntesis química , Tiofenos/toxicidad , Tiourea/análogos & derivados , Tiourea/síntesis química , Tiourea/farmacología , Tiourea/toxicidad , Tripanocidas/síntesis química , Tripanocidas/toxicidad
10.
J R Army Med Corps ; 162(5): 335-342, 2016 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-26385071

RESUMEN

INTRODUCTION: The human body makes many physiological adjustments throughout the day, including adjustments to body temperature. The purpose of this study was to determine oscillations in the skin temperature (Tsk-1-Tsk-25) at 25 body regions of interest (ROIs) over 1 day using infrared thermography. METHODS: Tsk values of 31 male (age 22.9±3.0 years) Brazilian Air Force members were evaluated from five thermograms collected at 7, 11, 15, 19 and 23 h (Tsk7,11,15,19,23) by a Fluke imager. We applied one-way analysis of variance for repeated measures for the different times of the day and Tukey's post hoc test to determine significant Tsk differences between ROIs (α=0.05), and the cosinor analysis was used to determine the midline estimating statistic of rhythm, amplitude and acrophase of Tsk during the 24 h period. RESULTS: The anterior hands showed the greatest Tsk variations throughout the day. In the lower limbs, scapula, abdomen, chest and lower back, Tsk-11, Tsk-15, Tsk-19 and Tsk-23 were significantly different (p<0.05) from Tsk-7. The lowest Tsk values were obtained in the early morning, with increases in the afternoon and levelling after 15:00. CONCLUSIONS: The Tsk at all ROIs and the averaged Tsk showed oscillations throughout the day, with the lowest values in the early morning (07:00). Temperature fluctuations depended on the specific ROI, with thermal stabilisation in some regions in the afternoon and a central upward trend throughout the day in the hands.


Asunto(s)
Ritmo Circadiano/fisiología , Personal Militar , Temperatura Cutánea/fisiología , Adulto , Brasil , Humanos , Masculino , Termografía , Adulto Joven
11.
Int J Sports Med ; 35(10): 879-85, 2014 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-24920559

RESUMEN

Analyzes of cardiac autonomic responses at the initial transient of exercise have been used for the investigation of the cardiovascular health. We evaluated the influence of aerobic fitness on HR and HRV responses at the onset of exercise. 25 male subjects (22.3±2.4 years) were divided into 2 groups: 'low aerobic fitness' (36.2±2.6ml.kg(-1).min(-1); n=10) and 'high aerobic fitness' (46.4±5.0ml.kg(-1).min(-1); n=15). The experimental session consisted of assessing the beat-to-beat HR at rest and during submaximal exercise. The autonomic responses at the onset of exercise were calculated by fitting the HR and HRV (rMSSD-index) curves during the initial 300s of exercise into a first-order exponential equation. The time constant of HR and of the rMSSD index (τonHR and τonrMSSD) were calculated for analysis. We observed lower values of τonrMSSD in the high aerobic fitness group compared to the low aerobic fitness group (26.8±5s vs. 38.0±18s, respectively; p=0.02). The τonHR (42.0±15 vs. 49.3±26s, p=0.38) for the groups showed no difference. Aerobic fitness partially influenced the autonomic responses during exercise, since individuals with higher fitness showed faster decreases in beat-to-beat HRV at the onset of exercise.


Asunto(s)
Ejercicio Físico/fisiología , Frecuencia Cardíaca/fisiología , Sistema Nervioso Parasimpático/fisiología , Aptitud Física/fisiología , Adulto , Prueba de Esfuerzo , Humanos , Masculino , Factores de Tiempo , Adulto Joven
12.
ESMO Open ; 9(4): 102946, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38507895

RESUMEN

BACKGROUND: Patients with cancer in low- and middle-income countries experience worse outcomes as a result of the limited capacity of health systems to deliver comprehensive cancer care. The health workforce is a key component of health systems; however, deep gaps exist in the availability and accessibility of cancer care providers. MATERIALS AND METHODS: We carried out a systematic review of the literature evaluating the strategies for capacity building of the cancer workforce. We studied how the policy strategies addressed the availability, accessibility, acceptability, and quality (AAAQ) of the workforce. We used a strategic planning framework (SWOT: strengths, weaknesses, opportunities, threats) to identify actionable areas of capacity building. We contextualized our findings based on the WHO 2030 Global Strategy on Human Resources for Health, evaluating how they can ultimately be framed in a labour market approach and inform strategies to improve the capacity of the workforce (PROSPERO: CRD42020109377). RESULTS: The systematic review of the literature yielded 9617 records, and we selected 45 eligible papers for data extraction. The workforce interventions identified were delivered mostly in the African and American Regions, and in two-thirds of cases, in high-income countries. Many strategies have been shown to increase the number of competent oncology providers. Optimization of the existing workforce through role delegation and digital health interventions was reported as a short- to mid-term solution to optimize cancer care, through quality-oriented, efficiency-improving, and acceptability-enforcing workforce strategies. The increased workload alone was potentially detrimental. The literature on retaining the workforce and reducing brain drain or attrition in underserved areas was commonly limited. CONCLUSIONS: Workforce capacity building is not only a quantitative problem but can also be addressed through quality-oriented, organizational, and managerial solutions of human resources. The delivery of comprehensive, acceptable, and impact-oriented cancer care requires an available, accessible, and competent workforce for comprehensive cancer care. Efficiency-improving strategies may be instrumental for capacity building in resource-constrained settings.


Asunto(s)
Creación de Capacidad , Fuerza Laboral en Salud , Neoplasias , Humanos , Neoplasias/terapia , Política de Salud , Atención Integral de Salud/organización & administración , Oncología Médica/organización & administración , Atención a la Salud
13.
J Reprod Immunol ; 163: 104224, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38479055

RESUMEN

INTRODUCTION: Myelomeningocele (MMC) results from incomplete closure of the neural tube, and has a complex multifactorial etiology, including an inflammatory microenvironment. OBJECTIVE: We evaluated the contribution of humoral immune response for development of inflammatory milieu. METHODS: Using public repository Gene Expression Omnibus (GEO), we retrieve dataset transcriptome from the amniotic fluid of ten fetuses with myelomeningocele and ten healthy control fetuses to found differential gene expression associated with disturbances and inflammatory signatures in MMC. The identified DEGs were submitted to enrichment, network, and matrix correlation analyses. RESULTS: Our initial analysis revealed 90 DEGs in MMC, mainly associated with signaling pathways of inflammation, including the immune modules, humoral immune response and IFN-type I signatures. Protein-protein analysis (PPI) revealed an association with three protein networks; positive regulation of B cell proliferation constituted the largest network. Matrix correlation analyses showed that MMC alters the co-expression of genes related to inflammatory processes that promote microenvironment inflammation. CONCLUSION: These results revealed an altered humoral immune response in MMC patients, contributing to an inflammatory profile and providing opportunities for identifying potential biomarkers in myelomeningocele disease.


Asunto(s)
Inmunidad Humoral , Meningomielocele , Transcriptoma , Humanos , Meningomielocele/inmunología , Meningomielocele/genética , Inmunidad Humoral/genética , Transcriptoma/inmunología , Femenino , Perfilación de la Expresión Génica , Embarazo , Mapas de Interacción de Proteínas/inmunología , Transducción de Señal/inmunología , Transducción de Señal/genética , Inflamación/inmunología , Inflamación/genética , Biomarcadores/metabolismo , Redes Reguladoras de Genes/inmunología
15.
J Intern Med ; 272(1): 85-92, 2012 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-22211699

RESUMEN

BACKGROUND: To what degree the associations between PCa risk and family history of prostate cancer (PCa) and/or breast cancer (BCa) are attributable to screening biases is unclear. We examined these questions within the REDUCE study, where biopsies were largely independent of prostate specific antigen (PSA) minimizing screening biases. METHODS: Data were from REDUCE, which tested dutasteride 0.5 mg daily for PCa risk reduction in men with PSA 2.5-10.0 ng mL(-1) and a negative prestudy biopsy. Among men undergoing at least one on-study biopsy with complete data (n = 6415; 78.1%), the association between family history and PCa risk was tested using multivariate logistic regression adjusting for clinicodemographic characteristics. RESULTS: A family history of PCa alone was associated with increased PCa diagnosis (OR: 1.47, 95%CI: 1.22-1.77). In North America, PCa family history was not related to PCa diagnosis (OR: 1.02, 95%CI: 0.73-1.44), whereas outside North America, PCa family history was significantly related to diagnosis (OR: 1.72, 95%CI: 1.38-2.15) (P-interaction = 0.01). A family history of both PCa and BCa (OR: 2.54, 95%CI: 1.72-3.75) but not BCa alone (OR: 1.04, 95%CI: 0.84-1.29) was associated with increased PCa risk versus no family history and irrespective of geographical region. CONCLUSIONS: In REDUCE, PCa family history was significantly related to PCa diagnosis, although only for men outside North America. The presence of both PCa and BCa family history significantly increased risk versus PCa family history alone, irrespective of geographical region. Ultimately, our observations may support the need for changes in how we address family history in terms of both risk of PCa diagnosis and general risk stratification.


Asunto(s)
Anticarcinógenos/administración & dosificación , Azaesteroides/administración & dosificación , Neoplasias de la Mama/genética , Anamnesis , Neoplasias de la Próstata/epidemiología , Neoplasias de la Próstata/genética , Inhibidores de 5-alfa-Reductasa/administración & dosificación , Anciano , Estudios de Cohortes , Método Doble Ciego , Esquema de Medicación , Dutasterida , Femenino , Humanos , Incidencia , Modelos Logísticos , Masculino , Persona de Mediana Edad , Análisis Multivariante , Oportunidad Relativa , Neoplasias de la Próstata/prevención & control , Medición de Riesgo , Factores de Riesgo
16.
Amino Acids ; 39(1): 135-44, 2010 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-19946788

RESUMEN

LyeTx I, an antimicrobial peptide isolated from the venom of Lycosa erythrognatha, known as wolf spider, has been synthesised and its structural profile studied by using the CD and NMR techniques. LyeTx I has shown to be active against bacteria (Escherichia coli and Staphylococcus aureus) and fungi (Candida krusei and Cryptococcus neoformans) and able to alter the permeabilisation of L: -alpha-phosphatidylcholine-liposomes (POPC) in a dose-dependent manner. In POPC containing cholesterol or ergosterol, permeabilisation has either decreased about five times or remained unchanged, respectively. These results, along with the observed low haemolytic activity, indicated that antimicrobial membranes, rather than vertebrate membranes seem to be the preferential targets. However, the complexity of biological membranes compared to liposomes must be taken in account. Besides, other membrane components, such as proteins and even specific lipids, cannot be discarded to be important to the preferential action of the LyeTx I to the tested microorganisms. The secondary structure of LyeTx I shows a small random-coil region at the N-terminus followed by an alpha-helix that reached the amidated C-terminus, which might favour the peptide-membrane interaction. The high activity against bacteria together with the moderate activity against fungi and the low haemolytic activity have indicated LyeTx I as a good prototype for developing new antibiotic peptides.


Asunto(s)
Antibacterianos/farmacología , Antifúngicos/farmacología , Péptidos Catiónicos Antimicrobianos/farmacología , Venenos de Araña/química , Animales , Antibacterianos/química , Antibacterianos/aislamiento & purificación , Antifúngicos/química , Antifúngicos/aislamiento & purificación , Péptidos Catiónicos Antimicrobianos/química , Péptidos Catiónicos Antimicrobianos/aislamiento & purificación , Candida/efectos de los fármacos , Cryptococcus neoformans/efectos de los fármacos , Relación Dosis-Respuesta a Droga , Escherichia coli/efectos de los fármacos , Pruebas de Sensibilidad Microbiana , Modelos Moleculares , Fosfatidilcolinas/antagonistas & inhibidores , Estructura Secundaria de Proteína , Arañas , Staphylococcus aureus/efectos de los fármacos
17.
Appl Radiat Isot ; 155: 108900, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31590099

RESUMEN

The Nuclear Metrology Laboratory (LMN) - IPEN, São Paulo, Brazil - developed a Digital Coincidence System (DCS), based on the Coincidence Counting Methodology, in order to improve its capabilities in radionuclide primary-standardization. Digital process is implemented in two steps: data-acquisition (a set of measurements) and offline software data-analysis and calculation. The present work shows the basics of the data-acquisition unit (Software Coincidence System - SCS), describes the DCS' data-analysis process and the initial approaches chosen for the implementation of the software package (Coincidence Analyzing Task - CAT). 152Eu standardization, performed for DCS testing, software expansion and validation, is briefly discussed.

18.
Appl Radiat Isot ; 164: 109237, 2020 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-32554127

RESUMEN

The procedure followed by the Nuclear Metrology Laboratory (LMN) at the IPEN-CNEN/SP, in São Paulo, for the primary standardization of 166Ho is described. The activity of 166Ho was determined by the efficiency extrapolation technique applied to a 4πß(PC)-γ coincidence system using a gas flow proportional counter in 4π geometry coupled to a 76 × 76 mm NaI(Tl) crystal. The results for the γ-rays intensities at 80.57 and 1379.45 keV were 0.0651(11) and 0.00904(11), respectively.


Asunto(s)
Rayos gamma , Holmio/normas , Radioisótopos/normas , Estándares de Referencia , Espectrometría gamma/normas
19.
Braz J Biol ; 80(3): 574-581, 2020 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31644651

RESUMEN

The Brazilian Cerrado has several botanical species for medicinal purposes used by traditional communities and many of these plants are not included in the list of Medicinal Plants Research Program of Central Medicines. The purpose of this study was the phytochemical screening and toxicology bioassay front of Brine shrimp L. of ethanolic extracts of eight species of plants used in folk medicine of Campo Grande, Mato Grosso do Sul, Brazil. The ethanolic extracts were submitted to phytochemical screening, determination of phenolic compounds and flavonoids. Toxicological assays were carried front of Brine shrimp according to standard methodology. The analysis TLC and HPLC-DAD confirmed the predominance of phenolic compounds and derivatives, specifically for the quercetin. The most toxic was the C. affinis DC. with death at all concentrations, the A. humile A. St. Hil. showed no mortality and the other species showed intermediate toxicity. The extracts of the investigated species are rich in phenolic compounds and derivatives, specifically quercetin, and feature toxicity between moderate to high, a fact that requires attention, since much of the traditional communities rely on herbal drugs in its raw form with preventive and curative purpose, meeting the basic health care.


Asunto(s)
Medicina Tradicional , Plantas Medicinales , Brasil , Fitoquímicos , Extractos Vegetales
20.
J Mycol Med ; 30(4): 101010, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-32690370

RESUMEN

The aim of this research is to verify the yeast species isolated from oral mucosa in street mixed-breed dogs and to determine the antifungal profiles. After capturing and sedating the animals, oral mucosa samples were collected from fifty dogs and the materials were inoculated on Sabouraud dextrose agar with chloramphenicol. Forty-three yeast strains were isolated and identified trough the API-20C AUX method. Thirty-seven (86.1%) of the yeasts belonged to genus Candida, five (11.6%) to genus Trichosporon and only one strain (2.3%) to genus Malassezia. The sensitivity profiles to anifungals (amphotericin B, itraconanole, ketoconazole, fluconazole and variconazole) were determined through Etest® method. This study found resistance of some yeasts to amphotericin B and a good susceptibility to voriconazole and ketoconazole. Some of these antifungals are used in veterinary medical practice. This research is the first investigation on street mixed-breed dogs regarding yeast identifications and antifungals profiles.


Asunto(s)
Antifúngicos/farmacología , Perros/microbiología , Mucosa Bucal/microbiología , Levaduras/efectos de los fármacos , Levaduras/aislamiento & purificación , Animales , Animales Salvajes , Cruzamientos Genéticos , Enfermedades de los Perros/microbiología , Perros/genética , Farmacorresistencia Fúngica , Femenino , Masculino , Pruebas de Sensibilidad Microbiana , Micosis/microbiología , Micosis/veterinaria
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