MARIANA MATERA VERAS
Projetos de Pesquisa
Unidades Organizacionais
LIM/05 - Laboratório de Poluição Atmosférica Experimental, Hospital das Clínicas, Faculdade de Medicina - Líder
106 resultados
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Agora exibindo 1 - 10 de 106
- Periurethral muscle-derived mononuclear cell injection improves urethral sphincter restoration in rats(2017) TURCO, Marcelo Pitelli; SOUZA, Alex Balduino de; SOUSA, Isida de Campos; FRATINI, Paula; VERAS, Mariana Matera; RODRIGUES, Marcio Nogueira; BESSA JR., Jose de; BROLIO, Marina Pandolphi; LEITE, Katia Ramos Moreira; BRUSCHINI, Homero; SROUGI, Miguel; MIGLINO, Maria Angelica; GOMES, Cristiano MendesAimsInvestigate the effect of a novel cell-based therapy with skeletal muscle-derived mononuclear cells (SMDMCs) in a rat model of stress urinary incontinence. MethodsMale Wistar-Kyoto rats' hind limb muscles were enzymatically dissociated, and SMDMCs were isolated without needing expansion. The cell population was characterized. Twenty female rats underwent urethrolysis. One week later, 10 rats received periurethral injection of 10(6) cells (SMDMC group), and 10 rats received saline injections (Saline group). Ten rats underwent sham surgery (Sham group). Four weeks after injection, animals were euthanized and the urethra was removed. The incorporation of SMDMCs in the female urethra was evaluated with fluorescence in situ hybridization for the detection of Y-chromosomes. Hematoxylin and eosin, Masson's trichrome staining, and immunohistochemistry for actin and myosin were performed. The muscle/connective tissue, actin and myosin ratios were calculated. Morphological evaluation of the urethral diameters and fractional areas of the lumen, mucosa, and muscular layer was performed. ResultsSMDMCs population was consistent with the presence of muscle cells, muscle satellite cells, perivascular cells, muscle progenitor cells, and endothelial cells. SMDMCs were incorporated into the urethra. A significant decrease in the muscle/connective tissue ratio was observed in the Saline group compared with the SMDMC and Sham groups. The proportions of actin and myosin were significantly decreased in the Saline group. No differences were observed in the morphometric parameters. ConclusionsSDMSC were incorporated into the rat urethra and promoted histological recovery of the damaged urethral sphincter, resulting in decreased connective tissue deposition and increased muscle content.
- Assessing socioeconomic bias of exposure to urban air pollution: an autopsy-based study in Sao Paulo, Brazil(2023) SINGER, Julio da Motta; ANDRE, Carmen Diva Saldiva de; ANDRE, Paulo Afonso de; ROCHA, Francisco Marcelo Monteiro; WAKED, Dunia; VAZ, Aline Macedo; GOIS, Gustavo Ferreira; ANDRADE, Maria de Fatima; VERAS, Mariana Matera; SALDIVA, Paulo Hilario Nascimento; BARROZO, Ligia VizeuBackground The characterisation of individual exposure to air pollution in urban scenarios is a challenge in environmental epidemiological studies. We investigated if the city's pollution monitoring stations over or underes-timate the exposure of individuals depending on their socioeconomic conditions and daily commuting times. Methods The amount of black carbon accumulated in the lungs of 604 deceased who underwent autopsy in Sao Paulo was considered as a proxy for PM10. The concentrations of PM10 in the residence of the deceased were estimated by interpolating an ordinary kriging model. These two-exposure metrics allowed us to construct an environmental exposure misclassification index ranging from -1 to 1. The association between the index and daily commuting, socioeconomic context index (GeoSES), and street density as predictors was assessed by means of a multilevel linear regression model. Findings With a decrease of 0.1 units in GeoSES, the index increases, on average, by 0.028 units and with an increase of 1 h in daily commuting, the index increases, on average, by 0.022 units indicating that individual exposure to air pollution is underestimated in the lower GeoSES and in people with many hours spent in daily commuting. Interpretation Reduction of health consequences of air pollution demands not only alternative fuel and more efficient mobility strategies, but also should include profound rethink of cities.
- PLURIPARIDADE NAS ÉGUAS: RELAÇÃO COM CARACTERÍSTICAS MATERNAS, PLACENTÁRIAS E NEONATAIS(2017) SERRANO-RECALDE, Elena Carolina; QUEIROZ-SILVA, Juliana Cristina; GUIMARÃES, Carina de Fatima; VERAS, Mariana Matera; BARBOSA, Roberta Galvano; ALONSO, Maria Augusta; FERNANDES, Claudia BarbosaAbstract The placenta connects the mare and the foal and it is one of the main organs responsible for fetal development and newborn’s morphometric characteristics. This function becomes even more important because a number of studies indicates that foals physical characteristics are able to predict their development in adult life. Therefore, the aim of this study was to correlate mares parity (1-5) and maternal characteristics with placental characteristics as well as foals size. Mares were categorized according to parity in G1: 1 parturation (n=4); G2: 2 parturations (n=6); G3: 3 parturations (n=7); G4: 4 parturations (n=5); and G5: 5 parturations (n=3). Results indicate that the mares pre- and post-parturition thoracic perimeter and weight had a positive correlation on foals weight (p=0.004/ R= 0.51; p=0.002/ R= 0.55; p=0.01/ R= 0.43), height (p=0.0005/ R= 0.60; p=0.001/ R= 0.57; p=0.005/ R= 0,50), and thoracic perimeter (p=0.0001/ R= 0.65; p≤0.0001/ R= 0.71; p=0.0002/ R= 0.64) at birth. Mares that were heavier at pre-partum had greater placental weight (p=0.01/R= 0.45) and delivered heavier foals (p=0.003/ R= 0.52) with greater thoracic perimeter (p=0.01/ R= 0.45). Foals of mares in G4 were heavier, probably indicating that the greater uterine size in multiparous mares allows greater placental coverage, greater fetomaternal surface contact and probably greater supply of nutrient to the fetus.
article 1 Citação(ões) na Scopus Efeitos do diluidor na viabilidade espermática pós-criopreservação em tourinhos da raça Gir Leiteiro aos 25 meses de idade, pré-selecionados pela classificação andrológica por pontos(2011) FELIPE-SILVA, A. S.; VALE FILHO, V. R.; FERREIRA, M. B. D.; CORREA, G. S. S.; SILVA, M. A.; VERAS, M. M.; ANDRADE, V. J.Semen cryopreservation from eight young dairy Gyr bulls was performed using two different semen extenders. Bulls aging 25 months old and pre-selected for a high average score (84.4 +/- 5.6 in a 0-100 scale) in Zebu breeding soundness evaluation (BSE) composed the experimental group. Extenders were based on lactosis-egg yolk-glycerol and soya lecithin. Chilling and freezing curves were standardized by CRYOGEN (R) machine. Post-thaw features evaluated in semen frost in both extenders - motility, vigor, major, minor and total deffects, morphological alteration in acrossome, bent tail, reative cells to hyposmotic sweeling test (Thos), and normal cells - were compared to the ones in the fresh ejaculate (except Thos) and among them. It was possible to freeze semen from all animals in the lactosis-egg yolk-glycerol extender. There were difference (P<0.05) in all analyzed features between fresh and cryopreserved semen, except for major deffects. Between extenders, there were differences (P<0.05) in motility, vigor, bent tail, and Thos. All bulls had successfull semen freezability. These results sustain that pre-selection for high BSE values (average >80 points) is a good index to identify bulls with good post semen - thaw features. However, the choice of the extender is critical for obtaining acceptable results.- Transcriptomic analysis of purified human cortical microglia reveals age-associated changes(2017) GALATRO, Thais F.; HOLTMAN, Inge R.; LERARIO, Antonio M.; VAINCHTEIN, Ilia D.; BROUWER, Nieske; SOLA, Paula R.; VERAS, Mariana M.; PEREIRA, Tulio F.; LEITE, Renata E. P.; MOLLER, Thomas; WES, Paul D.; SOGAYAR, Mari C.; LAMAN, Jon D.; DUNNEN, Wilfred den; PASQUALUCCI, Carlos A.; OBA-SHINJO, Sueli M.; BODDEKE, Erik W. G. M.; MARIE, Suely K. N.; EGGEN, Bart J. L.Microglia are essential for CNS homeostasis and innate neuroimmune function, and play important roles in neurodegeneration and brain aging. Here we present gene expression profiles of purified microglia isolated at autopsy from the parietal cortex of 39 human subjects with intact cognition. Overall, genes expressed by human microglia were similar to those in mouse, including established microglial genes CX3CR1, P2RY12 and ITGAM (CD11B). However, a number of immune genes, not identified as part of the mouse microglial signature, were abundantly expressed in human microglia, including TLR, F-c gamma and SIGLEC receptors, as well as TAL1 and IFI16, regulators of proliferation and cell cycle. Age-associated changes in human microglia were enriched for genes involved in cell adhesion, axonal guidance, cell surface receptor expression and actin (dis)assembly. Limited overlap was observed in microglial genes regulated during aging between mice and humans, indicating that human and mouse microglia age differently.
- USEFULNESS OF GASTRIC SUBMUCOSAL DISSECTION DEPTH TO EVALUATE SKILL ACQUIREMENT IN SHORT TERM TRAINING COURSES IN ESD: AN EXPERIMENTAL STUDY(2018) YAMAZAKI, Kendi; MOURA, Eduardo Guimarães Hourneaux de; VERAS, Mariana Matera; MESTIERI, Luiz Henrique; SAKAI, PauloABSTRACT BACKGROUND: Endoscopic submucosal dissection (ESD) is a complex endoscopic procedure, with high rates of adverse events and technical difficulties. To overcome that problem, many training centers published the importance of animal models for skill acquirement in ESD. However, no study has used the submucosal dissection depth (DSUB) as a parameter to evaluate the learning curve in ESD, which might be a relevant factor since an optimal resection plane is important to achieve a curative resection and avoid intraoperative complications. OBJECTIVE: This study aimed to assess ESD skill acquirement after short-term training sessions by evaluating the submucosal dissection depth (DSUB) and the association with adverse events. METHODS: This experimental study included 25 experienced endoscopists in therapeuthic procedures (>5years) and 75 specimens resected by ESD (three resections / endoscopist). Learning parameters (resection time, size, en bloc resection rate, bleeding, perforation and submucosal dissection depth) were prospectively evaluated. The percentages of DSUB of all specimens resected were calculated. RESULTS: All specimens were resected from the gastric body (n=75). The mean size of the resected specimens was 23.97±7.2 mm. The number of adverse events, including bleeding, perforation, and death, were 17 (22.67%), 3 (4%), and 0 cases, respectively. The average mean time by the third dissection decreased from 28.44±9.73 to 18.72±8.81 min (P<0.001). The proportion of DSUB in the bleeding and non-bleeding group were respectively 37.97%±21.13% and 68.66%±23.99%, indicating a significant association between DSUB and bleeding incidence (P<0.001). The ROC curve analysis indicated a cut-off point of 61% (sensitivity, 64%; specificity, 94%) of submucosal dissection depth associated with bleeding. Therefore, when ESD was performed at a depth of >61% of the submucosal layer, the risk for bleeding during the procedure decreased (PPV, 0.97; 95% CI, 0.85-0.99). CONCLUSION: Improvement in the learning curve in ESD and a better cognitive ability were seen by the third dissection in these short term training courses. And a significant association between DSUB and the risk of bleeding.
- Aerobic exercise training combined or not with okra consumption as a strategy to prevent kidney changes caused by metabolic syndrome in Zucker rats(2022) SILVA, Monique Marques da; GOMES, Moises Felipe Pereira; MOURA, Elizabeth de Orleans Carvalho de; VERAS, Mariana Matera; KUBOTA, Melina Chiemi; TAKANO, Ana Paula; SANTOS, Ana Carolina Cardoso dos; JOSE, Carolina Goncalves dos Reis; SOUZA, Graziele Aparecida da Silva; CARDOSO, Naiara Magalhaes; ESTADELLA, Debora; LAMBERTUCCI, Rafael Herling; MEDEIROS, AlessandraThe complications of Metabolic Syndrome (MetS) include kidney disease, and most dialysis patients are diagnosed with MetS. The benefit of exercise training (ET) for MetS treatment is already well defined in the literature, but the antidiabetic and antihyperlipidemic benefits of okra (O) have been discovered only recently. The aim of this study was to evaluate the effects of O and/or ET supplementation on renal function and histology; serum urea and creatinine value; inflammation (IL-6, IL-10, TNF-alpha) and oxidative stress in renal tissue. For this, 32 Zucker rats (fa/fa) were randomly separated into four groups of 8 animals each: Metabolic Syndrome (MetS), MetS + Okra (MetS + O), MetS + Exercise Training (MetS + ET), and MetS + Exercise Training and Okra (MetS + ET + O), and 8 Zucker lean (fa/+) rats comprised the Control group (CTL). Okra was administered by orogastric gavage 2x/day (morning and night, 100 mg/kg) and ET performed on the treadmill, at moderate intensity, 1h/day, 5x/week for 6 weeks. Although the renal function was not altered, the animals with MetS showed greater fibrotic deposition accompanied by a worse stage of renal injury, in addition to increased kidney weight. Although all interventions were beneficial in reducing fibrosis, only ET combined with O was able to improve the degree of renal tissue impairment. ET improved the anti-inflammatory status and reduced nitrite levels, but the combination of ET and O was more beneficial as regards catalase activity. Okra consumption alone did not promote changes in inflammatory cytokines and oxidative stress in the kidney. In conclusion, ET combined or not with O seems to be beneficial in preventing the progression of renal disease when renal function is not yet altered.
conferenceObject Fine particulate matter in the inspired air within the limits recommended by WHO alters placental structure(2014) SOTO, Sonia; LOPES, Karen; VERAS, Mariana; HEIMANN, JoelconferenceObject Perinatal exposure to PM2.5 can cause long-lasting changes in neurotransmission and neuroinflammation, and predispose to epileptic seizure(2021) FERNANDES, Maria Jose Silva; ARAUJO, Luis Fernando Sierra de; PEROSA, Regina; VERAS, Mariana Matera; CARLETTI, Carla OliveiraconferenceObject IMPACTS OF RECREATIONAL USE OF CANNABIS SATIVA ON GESTATIONAL AND DEVELOPMENTAL OUTCOMES IN MICE: PRELIMINARY RESULTS(2015) BENEVENUTO, S. G. M.; BELOTTI, L.; COSTA, N. S. X.; DOLHNIKOFF, M.; RIBEIRO JUNIOR, G.; LOURENCO, D. T.; VERAS, M. M.