Pelli A.A.,Laboratory of Animal and Comparative Histology |
Pelli A.A.,Federal University of Rio de Janeiro |
Cinelli L.P.,Clementino Fraga Filho University Hospital |
Cinelli L.P.,Federal University of Rio de Janeiro |
And 4 more authors.
Micron | Year: 2010
Glycosaminoglycans (GAGs) from the integument of Lithobates catesbeianus were biochemically characterized and histochemically localized. Moreover, carbohydrate distribution was investigated using conventional and lectin histochemistry at light microscopy. Hyaluronan (HA), dermatan sulfate (DS) and a heparanoid were found in the integument. Sulfated and carboxylated GAGs were visualized in the Eberth-Katschenko (EK) layer, in the mucous glands, in the hypodermis as well as in the mast cells. Furthermore, glucose and galactose were identified in the integument through thin layer chromatography (TLC) assays. N-Acetyl-β-glucosamine residues were identified in the mucous glandular cells, between the corneum and spinosum strata, in the subepidermal region, and in the EK layer. N-Acetyl-galactosamine residues were evident in the EK layer, corresponding to a residue of the dermatan sulfate chain, which may be related to the collagenous fiber arrangement. These glycoconjugates occurred as secretory glandular products and as dermal structural elements. Moreover, HA and DS are the predominant GAGs in the L. catesbeianus integument. Considering the importance of glycoconjugates, they play a significant role to the integrity of the skin, providing mechanical support for integument cells. In addition, they are important to the water regulation mechanisms, since L. catesbeianus is preferably aquatic. © 2010 Elsevier Ltd.
Pinto P.C.L.,Federal University of Rio de Janeiro |
Sanchez T.G.,University of Sao Paulo |
Tomita S.,Clementino Fraga Filho University Hospital
Brazilian Journal of Otorhinolaryngology | Year: 2010
Tinnitus is a symptom present in approximately 15% of the world population. Most patients are between 40 and 80 years of age; the prevalence above 60 reaches 33%. About 20% have moderate to severe impact in the quality of life but the factors associated with the tinnitus annoyance are not completely known. Aim: The objective of this study is to evaluate the relationship between age, gender and hearing loss on tinnitus annoyance. Materials and methods: 68 patients were evaluated at the tinnitus center at our hospital, from March 2007 to march 2008, with a detailed interview, complete otolaryngological examination, the Portuguese version of the Tinnitus Handicap Inventory and pure tone audiometry. Results: Age varied from 24 to 83 (mean=59); the mean THI value was 39 (females: 36; males: 44). THI grades were: slight: 32.3%; mild: 19.1%; moderate: 20.6%; severe: 13.2% and catastrophic: 14.7%. No significant correlation was found between gender (p=0.30), age (p=0.77) hearing loss (p>0.05 for all averages analyzed) and tinnitus severity. Conclusion: Gender, age and hearing loss do not influence tinnitus annoyance, using the THI. © Revista Brasileira de Otorrinolaringologia.
Melo-Villar L.,Oswaldo Cruz Institute |
Lampe E.,Oswaldo Cruz Institute |
de Almeida A.J.,Oswaldo Cruz Institute |
Scalioni L.P.,Oswaldo Cruz Institute |
And 6 more authors.
Annals of Hepatology | Year: 2015
Background. The relationship between 25-hydroxyvitamin D [25(OH)D] serum levels and response to antiviral therapy and laboratory data in HCV infection remains unclear. The aim of this study was to determine pre-treatment 25(OH)D serum level among HCV infected individuals and to evaluate the association between vitamin D status, virological response, and laboratory data. Material and methods. Baseline serum 25(OH)D levels were measured in 237 chronic HCV infected patients (139 female, age 53.7 ± 11.2 years) using chemiluminescence immunoassay. Correlations between serum 25(OH)D levels, virological and laboratory data regarding HCV infection as well as sustained virological response (SVR) to antiviral therapy were evaluated. Results. Mean serum values of 25(OH)D was 26.2 ± 12 ng/mL and prevalence of vitamin D deficiency (< 30 ng/mL) was 66.2%. Advanced age (> 55 years), high mean values of LDL, total cholesterol, HDL and low mean values of alkaline phosphatase and hemoglobin were statistically associated to vitamin D deficiency. Antiviral treatment was underwent by 133 HCV patients and 44.3% of them achieved SVR. Most of individuals that presented SVR also presented 25(OH)D level higher than 30ng/mL (55.9%). SVR was associated to low mean values of LDL, total cholesterol and platelets; high mean values of ALT, AST and low fibrosis grade. Conclusions: In conclusion, low vitamin D levels were observed among HCV infected patients and was associated to laboratory findings, however baseline 25(OH)D level is not independently associated with SVR. © 2015, Fundacion Clinica Medica Sur. All rights reserved.
Peixinho C.C.,Federal University of Rio de Janeiro |
Ribeiro M.B.,Federal University of Rio de Janeiro |
Resende C.M.C.,Clementino Fraga Filho University Hospital |
Werneck-De-Castro J.P.S.,Federal University of Rio de Janeiro |
And 2 more authors.
Journal of Experimental Biology | Year: 2011
This work describes the use of ultrasound biomicroscopy (UBM) to follow up the degeneration-regeneration process after a laceration injury induced in the lateral gastrocnemius (LG) and soleus (SOL) muscles of rats. UBM (40 MHz) images were acquired and used for biomechanical characterization of muscular tissue, specifically using pennation angle (PA) and muscle thickness (MT). The animals were distributed in three groups: the variability group (VG; N=5), the gastrocnemius injured group (GG; N=6) and the soleus injured group (SG; N=5). VG rats were used to assess data variability and reliability (coefficients of variation of 9.37 and 3.97% for PA and MT, respectively). GG and SG rats were submitted to the injury protocol in the LG and SOL muscles of the right legs, respectively. UBM images of muscles of both legs were acquired at the following time points: before and after injury (immediately, 7, 14, 21 and 28days). We observed an increase in PA for the non-injured leg 28days after injury for both GG and SG rats (GG=10.68 to 16.53deg and SG=9.65 to 14.06deg; P<0.05). Additionally, MT presented a tendency to increase (GG=2.92 to 3.13 mm and SG=2.12 to 2.35 mm). Injured legs maintained pre-injury PA and MT values. It is suggested that a compensatory hypertrophic response due to the overload condition imposed to healthy leg. The results indicate that UBM allows qualitative and quantitative muscle differentiation among healthy and injured muscle at different stages after lesion. © 2011. Published by The Company of Biologists Ltd.
De Araujo L.F.B.,Clementino Fraga Filho University Hospital |
De Araujo L.F.B.,Federal University of Rio de Janeiro |
Grozovsky R.,Federal University of Rio de Janeiro |
Dos Santos Pereira M.J.,State University of Rio de Janeiro |
And 3 more authors.
Thyroid | Year: 2010
Background: Estrogen promotes the growth of thyroid cells. Therefore, we analyzed the influence of estrogen and selective estrogen receptor modulators (SERMs) on the expression of vascular endothelial growth factor (VEGF) and nitric oxide synthase III (NOS III) in the thyroid gland of ovariectomized (Ovx) rats. Methods: Wistar rats were divided into five groups, and bilateral ovariectomies were performed, except on the Sham-operated controls (Sham). Rats were grouped as follows: Sham; Ovx; and Ovx rats treated with daily subcutaneous injections of estradiol benzoate 3.5 μg/kg, tamoxifen 2.5 mg/kg, or raloxifene 2.5 mg/kg for 50 consecutive days. Control animals received vehicle (propyleneglycol), and at the end of the treatment, rats were sacrificed. The thyroid glands were excised, weighed, and processed for analysis of the expression of VEGF or NOS III by immunohistochemistry. The mean vascular areas were evaluated by immunodetection of α-smooth muscle actin. Results: Thyroid weight and mean vascular area were lower in Ovx as compared with Sham, Ovx+estradiol benzoate, Ovx+Tam, or Ovx+Ral (p<0.01). VEGF (p<0.01) and NOS III expressions (p<0.05) were significantly lower in the Ovx group, as compared with Sham, Ovx+estradiol benzoate, Ovx+Tam, and Ovx+Ral. Immunoreactivity for both VEGF and NOS III was mainly detected in the cytoplasm of the follicular epithelial cells. Conclusions: Our data suggest that estrogen and SERMs regulate the thyroid gland vascularization and that tamoxifen and raloxifene behave like estrogen does. Estrogen and SERMs upregulate VEGF and NOS III in such a way as to reverse the effects detected on the thyroid microvasculature of the Ovx rats. © Mary Ann Liebert, Inc.
Maior A.S.,Carlos Chagas Filho Biophysics Institute |
Maior A.S.,Plinio Leite University |
Menezes P.,Post Graduate Physical Education Program |
Pedrosa R.C.,Clementino Fraga Filho University Hospital |
And 3 more authors.
Clinical and Experimental Pharmacology and Physiology | Year: 2010
1. The aim of the present study was to investigate the cardiovascular effects of anabolic androgenic steroid (AAS) abuse by comparing the electrocardiographic parameters before and after submaximal exercise between AAS users and non-AAS users. 2. A total of 22 men who regularly engaged in both resistance and aerobic exercise at fitness academies volunteered for the study (control group: n = 11, age 25 ± 4 years; AAS group: n = 11, age 27 ± 5 years). All subjects were submitted to submaximal exercise testing using an Astrand-Rhyming protocol. Heart rate and electrocardiography parameters were measured at rest and at the third minute of the post-exercise recovery time. 3. AAS users presented higher QTc and QTd at rest (10% and 55%, respectively) and at the post-exercise period (17% and 43%, respectively), compared with control subjects. The maximal and minimum QTc interval of the AAS group was significantly prolonged at the post-exercise period (12% and 15%, respectively). The haemodynamic parameters were similar in both groups (P > 0.05). The AAS group showed a lower heart rate recovery at the first minute after the test (P = 0.0001), and a higher exertion score (P < 0.0001) at a lower workload, compared with the control group. 4. Our results show that the QTc interval and dispersion are increased in individuals who abuse AAS, suggesting the presence of ventricular repolarization abnormalities that could potentially increase the risk of cardiac arrhythmias and sudden cardiac death. © 2010 The Authors. Clinical and Experimental Pharmacology and Physiology © 2010 Blackwell Publishing Asia Pty Ltd.
Folarin O.A.,University of Ibadan |
Bustamante C.,Clementino Fraga Filho University Hospital |
Gbotosho G.O.,University of Ibadan |
Sowunmi A.,University of Ibadan |
And 3 more authors.
Acta Tropica | Year: 2011
Amodiaquine (AQ) is currently being used as a partner drug in combination with artesunate for treatment of uncomplicated malaria in most endemic countries of Africa. In the absence of molecular markers of artemisinin resistance, molecular markers of resistance to AQ may be useful for monitoring the development and spread of parasites resistance to Artesunate-Amodiaquine combination. This study was designed to assess the potential role of polymorphisms on pfcrt and pfmdr1 genes and parasite in vitro susceptibility for epidemiological surveillance of amodiaquine resistance in Plasmodium falciparum. The modified schizont inhibition assay was used to determine in vitro susceptibility profiles of 98 patients' isolates of P. falciparum to amodiaquine. Polymorphisms on parasites pfcrt and pfmdr1 genes were determined with nested PCR followed by sequencing.The geometric mean (GM) of AQ 50% inhibitory concentration (IC-50) in the 97 P. falciparum isolates was 20.48. nM (95% CI 16.53-25.36. nM). Based on the cut-off value for AQ in vitro susceptibility, 87% (84) of the P. falciparum isolates were sensitive to AQ (GM IC-50. = 16.32. nM; 95%CI 13.3-20.04. nM) while 13% were resistant to AQ in vitro (GM IC-50. = 88.73. nM; 95%CI 69.67-113.0. nM). Molecular analysis showed presence of mutant CVIET pfcrt haplotype, mutant pfmdr1Tyr86 allele and the double mutant CVIET pfcrt haplotype. +. pfmdr1Tyr86 in 72%, 49% and 35%, respectively. The GM IC-50 of isolates harboring the wild-type pfcrt CVMNK haplotype. +. pfmdr1Asn86 allele (3.93. nM; 95%CI 1.82-8.46. nM) was significantly lower (p= 0.001) than those isolates harboring the double mutant pfcrt CVIET haplotype. +. pfmdr1Tyr86 allele (50.40. nM; 95%CI 40.17-63.24. nM).Results from this study suggest that polymorphisms in pfcrt and pfmdr1 genes are important for AQ resistance and therefore may be useful for epidemiological surveillance of P. falciparum resistance to AQ. © 2011 Elsevier B.V.
PubMed | Clementino Fraga Filho University Hospital, Hospital Universitario Of Valme and Oswaldo Cruz Institute
Type: Journal Article | Journal: Annals of hepatology | Year: 2015
The relationship between 25-hydroxyvitamin D [25(OH)D] serum levels and response to antiviral therapy and laboratory data in HCV infection remains unclear. The aim of this study was to determine pre-treatment 25(OH)D serum level among HCV infected individuals and to evaluate the association between vitamin D status, virological response, and laboratory data.Baseline serum 25(OH)D levels were measured in 237 chronic HCV infected patients (139 female, age 53.7 11.2 years) using chemiluminescence immunoassay. Correlations between serum 25(OH)D levels, virological and laboratory data regarding HCV infection as well as sustained virological response (SVR) to antiviral therapy were evaluated.Mean serum values of 25(OH)D was 26.2 12 ng/mL and prevalence of vitamin D deficiency (< 30 ng/mL) was 66.2%. Advanced age (> 55 years), high mean values of LDL, total cholesterol, HDL and low mean values of alkaline phosphatase and hemoglobin were statistically associated to vitamin D deficiency. Antiviral treatment was underwent by 133 HCV patients and 44.3% of them achieved SVR. Most of individuals that presented SVR also presented 25(OH)D level higher than 30ng/mL (55.9%). SVR was associated to low mean values of LDL, total cholesterol and platelets; high mean values of ALT, AST and low fibrosis grade.In conclusion, low vitamin D levels were observed among HCV infected patients and was associated to laboratory findings, however baseline 25(OH)D level is not independently associated with SVR.
PubMed | Federal University of Rio de Janeiro, Oswaldo Cruz Foundation, Ohio State University, Pontifical Catholic University of Rio de Janeiro and Clementino Fraga Filho University Hospital
Type: Journal Article | Journal: PloS one | Year: 2016
Dengue disease is an acute viral illness caused by dengue virus (DENV) that can progress to hemorrhagic stages leading to about 20000 deaths every year worldwide. Despite many clinical investigations regarding dengue, the immunopathogenic process by which infected patients evolve to the severe forms is not fully understood. Apart from differences in virulence and the antibody cross reactivity that can potentially augment virus replication, imbalanced cellular immunity is also seen as a major concern in the establishment of severe dengue. In this context, the investigation of cellular immunity and its products in dengue fatal cases may provide valuable data to help revealing dengue immunopathogenesis. Here, based in four dengue fatal cases infected by the serotype 3 in Brazil, different peripheral organs (livers, lungs and kidneys) were studied to evaluate the presence of cell infiltrates and the patterns of local cytokine response. The overall scenario of the studied cases revealed a considerable systemic involvement of infection with mononuclear cells targeted to all of the evaluated organs, as measured by immunohistochemistry (IHC). Quantification of cytokine-expressing cells in peripheral tissues was also performed to characterize the ongoing inflammatory process by the severe stage of the disease. Increased levels of IFN-- and TNF--expressing cells in liver, lung and kidney samples of post-mortem subjects evidenced a strong pro-inflammatory induction in these tissues. The presence of increased RANTES-producing cell numbers in all analyzed organs suggested a possible link between the clinical status and altered vascular permeability. Co-staining of DENV RNA and IFN- or TNF- using in situ hibridization and IHC confirmed the virus-specific trigger of the pro-inflammatory response. Taken together, this work provided additional evidences that corroborated with the traditional theories regarding the cytokine storm and the occurrence of uneven cellular immunity in response to DENV as major reasons for progress to severe disease.
PubMed | Clementino Fraga Filho University Hospital and Federal University of Rio de Janeiro
Type: Journal Article | Journal: Journal of endocrinological investigation | Year: 2015
Epicardial fat thickness (EFT) has been evaluated as a marker of cardiovascular disease, with good correlation with classical cardiovascular risk factors in the general population. The aim of this study was to evaluate the EFT in subclinical hypothyroidism (SCH), in comparison to a group without thyroid dysfunction.A cross-sectional study was performed with 100 participants, including 52 SCH patients and 48 individuals without any thyroid dysfunction (euthyroid group-EU). Transthoracic echocardiography (TE), thyroid hormone levels, lipid profile, and assessment of body composition by bioelectrical impedance (BIA) and anthropometry were measured in all subjects.The SCH and EU groups were comparable with respect to age, gender, and Framingham risk scores. Serum thyroid-stimulating hormone (TSH) was 6.7 1.4 mIU/L in the SCH group and 2.0 0.84 mIU/L in the control group. EFT was similar in both groups (SCH 3.5 1.3 mm, EU 3.5 1.1 mm, p = 0.43). EFT showed a slight trend for a positive correlation with serum TSH in the SCH group (r s = 0.263, p = 0.05). EFT correlated with the body fat percentage in the SCH group (r s = 0.350, p = 0.03) and EU group (r s = 0.033, p = 0.04). EFT in this cohort was not independently correlated to changes in TSH and Framingham risk score.EFT determination by TE does not seem to be a good marker of cardiovascular risk in SCH patients with serum TSH <10.0 mIU/L and no pre-existing cardiovascular morbidity.