Katia Ramos Moreira Leite

Prof. Dr. Katia Ramos Moreira Leite

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Research Focus & Metrics

Academic Career Length

30Years (1997-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 March 2014 in Anesthesiology
Verified
Journal Article
Closed access
FBFernando Botto
Fernando Botto
PAPablo Alonso
Pablo Alonso
MCMatthew TV Chan
Matthew TV Chan
JVJuan Villar
Juan Villar
DXDenis Xavier
Denis Xavier
TWTroy Wildes
Troy Wildes
Background: Myocardial injury after noncardiac surgery (MINS) was defined as prognostically relevant myocardial injury due to ischemia that occurs during or within 30 days after noncardiac surgery. The study’s four objectives were to determine the diagnostic criteria, characteristics, predictors, and 30-day outcomes of MINS. Methods: In this international, prospective cohort study of 15,065 patients aged 45 yr or older who underwent in-patient noncardiac surgery, troponin T was measured during the first 3 postoperative days. Patients with a troponin T level of 0.04 ng/ml or greater (elevated “abnormal” laboratory threshold) were assessed for ischemic features (i.e., ischemic symptoms and electrocardiography findings). Patients adjudicated as having a nonischemic troponin elevation (e.g., sepsis) were excluded. To establish diagnostic criteria for MINS, the authors used Cox regression analyses in which the dependent variable was 30-day mortality (260 deaths) and independent variables included preoperative variables, perioperative complications, and potential MINS diagnostic criteria. Results: An elevated troponin after noncardiac surgery, irrespective of the presence of an ischemic feature, independently predicted 30-day mortality. Therefore, the authors’ diagnostic criterion for MINS was a peak troponin T level of 0.03 ng/ml or greater judged due to myocardial ischemia. MINS was an independent predictor of 30-day mortality (adjusted hazard ratio, 3.87; 95% CI, 2.96–5.08) and had the highest population-attributable risk (34.0%, 95% CI, 26.6–41.5) of the perioperative complications. Twelve hundred patients (8.0%) suffered MINS, and 58.2% of these patients would not have fulfilled the universal definition of myocardial infarction. Only 15.8% of patients with MINS experienced an ischemic symptom. Conclusion: Among adults undergoing noncardiac surgery, MINS is common and associated with substantial mortality.

28 June 2004 in Oncogene
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Journal Article
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EREduardo Reis
Eduardo Reis
Helder NakayaHelder Nakaya
Helder Nakaya
RLRodrigo Louro
Rodrigo Louro
FCFlavio C Canavez
Flavio C Canavez
ÁFÁurea V F Flatschart
Áurea V F Flatschart
SVSergio Verjovski-Almeida
Sergio Verjovski-Almeida

7 February 2012 in Journal of Heredity
Verified
Journal Article
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FCFlavio C. Canavez
Flavio C. Canavez
DLDouglas D. Luche
Douglas D. Luche
PSPaul Stothard
Paul Stothard
KLKatia Ramos Moreira Leite
Katia Ramos Moreira Leite
JSJuliana M. Sousa-Canavez
Juliana M. Sousa-Canavez
LCLuiz H. Camara-Lopes
Luiz H. Camara-Lopes
Cattle are divided into 2 groups referred to as taurine and indicine, both of which have been under strong artificial selection due to their importance for human nutrition. A side effect of this domestication includes a loss of genetic diversity within each specialized breed. Recently, the first taurine genome was sequenced and assembled, allowing for a better understanding of this ruminant species. However, genetic information from indicine breeds has been limited. Here, we present the first genome sequence of an indicine breed (Nellore) generated with 52X coverage by SOLiD sequencing platform. As expected, both genomes share high similarity at the nucleotide level for all autosomes and the X chromosome. Regarding the Y chromosome, the homology was considerably lower, most likely due to uncompleted assembly of the taurine Y chromosome. We were also able to cover 97% of the annotated taurine protein-coding genes.

13 June 2012 in BMC Urology
Verified
Journal Article
Open access
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SRSabrina Thalita Reis
Sabrina Thalita Reis
KLKatia Ramos Moreira Leite
Katia Ramos Moreira Leite
LPLuís Felipe Piovesan
Luís Felipe Piovesan
JPJosé Pontes-Junior
José Pontes-Junior
NVNayara Viana
Nayara Viana
MDMarcos Francisco Dall’oGlio
Marcos Francisco Dall’oGlio
Background: Extracellular matrix homeostasis is strictly maintained by a coordinated balance between the expression of metalloproteinases (MMPs) and their inhibitors. The purpose of this study was to investigate whether the expression of MMP-9, MMP-2 and its specific inhibitors, are expressed in a reproducible, specific pattern and if the profiles are related to prognosis in Bladder Cancer (BC). Methods: MMP-9, MMP-2 and its specific inhibitors expression levels were analyzed by quantitative real-time polymerase chain reaction (qRT-PCR) in fresh-frozen malignant tissue collected from 40 patients with BC submitted to transurethral resection of bladder. The control group consisted of normal bladder tissue from five patients who had undergone retropubic prostatectomy to treat benign prostatic hyperplasia. Results: MMP-9 was overexpressed in 59.0 % of patients, and MMP-2, TIMP-1, TIMP-2, MMP-14, RECK and IL-8 was underexpressed in most of the patients. Regarding prognostic parameters we observed that high-grade tumors exhibited significantly higher levels of MMP-9 and IL-8 (p = 0.012, p = 0.003). Invasive tumors (pT1-pT2) had higher expression levels of MMP-9 than superficial tumors (pTa) (p = 0.026). The same was noted for IL-8 that was more expressed by invasive tumors (p = 0.015, p = 0.048). Most importantly tumor recurrence was related with higher levels of both MMP-9 (p = 0.003) and IL-8 (p = 0.005). Conclusion: We have demonstrated that the overexpression of MMP-9 and higher expression of IL-8 are related to unfavorable prognostic factors of urothelial bladder cancer and tumor recurrence and may be useful in the follow up of the patients.

29 May 2012 in BMC Urology
Verified
Journal Article
Open access
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SRSabrina Thalita Reis
Sabrina Thalita Reis
JPJosé Pontes-Junior
José Pontes-Junior
AAAlberto Azoubel Antunes
Alberto Azoubel Antunes
MDMarcos Francisco Dall’oGlio
Marcos Francisco Dall’oGlio
NDNelson Dip
Nelson Dip
KLKatia Ramos Moreira Leite
Katia Ramos Moreira Leite
Prognosis of prostate cancer (PCa) is based mainly in histological aspects together with PSA serum levels that not always reflect the real aggressive potential of the neoplasia. The micro RNA (miRNA) mir-21 has been shown to regulate invasiveness in cancer through translational repression of the Metaloproteinase (MMP) inhibitor RECK. Our aim is to investigate the levels of expression of RECK and miR-21 in PCa comparing with classical prognostic factors and disease outcome and also test if RECK is a target of miR-21 in in vitro study using PCa cell line.

1 May 2011 in Urologic Oncology: Seminars and Original Investigations
Verified
Journal Article
Closed access
KLKatia Ramos Moreira Leite
Katia Ramos Moreira Leite
JSJuliana M. Sousa-Canavez
Juliana M. Sousa-Canavez
SRSabrina T. Reis
Sabrina T. Reis
ATAlberto H. Tomiyama
Alberto H. Tomiyama
LCLuiz H. Camara-Lopes
Luiz H. Camara-Lopes
MSMiguel Srougi
Miguel Srougi