Wilson R. Freitas Júnior

Prof. Dr. Wilson R. Freitas Júnior

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Research Focus & Metrics

Academic Career Length

21Years (2006-Present)

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

Representative Publications

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1 March 2018 in Obesity Surgery
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WJWilson R. Freitas Júnior
Wilson R. Freitas Júnior
LOLuis Vicente Franco Oliveira
Luis Vicente Franco Oliveira
EPEduardo A. Perez
Eduardo A. Perez
EIElias Jirjoss Ilias
Elias Jirjoss Ilias
CLCarina P. Lottenberg
Carina P. Lottenberg
CMCarlos Alberto Malheiros
Carlos Alberto Malheiros
Background Obesity is a worldwide disease related to genetic, environmental, and behavioral factors, and it is associated with high rates of morbidity and mortality. Recently, obesity has been characterized by a low-grade inflammatory state known as inflammome indicated by chronic increases in circulating concentrations of inflammatory markers. The purpose of this study was to evaluate the effect of weight loss induced by surgery for obesity and weight-related diseases on pro-inflammatory cytokine (TNF-α) and anti-inflammatory adipokine (adiponectin) levels, and on an adipose-derived hormone (leptin) in severely obese subjects. Methods This randomized, controlled trial involved 55 severe obese patients (50 women, age 18–63 years, and body mass index of 35.7–63 kg/m2) who underwent bariatric surgery (BS). Patients with a BMI > 65 kg/m2 and clinical and mental instability, or significant and unrealistic expectations of surgery were excluded. Blood samples were collected during the fasting period to analyze tumor necrosis factor alpha (TNF-α), adiponectin, and leptin levels by enzyme-linked immunosorbent assay. Results At baseline, no significant difference was observed in the anthropometric, demographic, clinical characteristics and biochemistry and inflammatory markers between the control group (CG) and bariatric surgery group (BSG). The same finding was also observed when we compared the baseline variables to those at the 6-month follow-up in the CG. However, the same variables in the BSG group were significantly different between baseline and the 6-month follow-up after BS. Conclusions Weight loss induced by surgery for obesity and weight-related diseases reduced the inflammome state in severely obese patients.

23 September 2025 in Biomedicines
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WPWilson José S. Pedro
Wilson José S. Pedro
KTKeyci Tabata
Keyci Tabata
FAFernanda N. B. R. Alves
Fernanda N. B. R. Alves
LBLenita V. Braga
Lenita V. Braga
LALarissa R. Alves
Larissa R. Alves
WJWilson R. Freitas Júnior
Wilson R. Freitas Júnior
Obesity is a multifactorial disease with endocrine, metabolic, and inflammatory underpinnings, leading to numerous comorbidities and increased mortality. This has driven research into adipose tissue’s role as an endocrine organ that secretes adipokines. This review critically analyzes three of these adipokines: chemerin, omentin-1, and visfatin. Chemerin and omentin-1 have well-defined roles as pro- and anti-inflammatory mediators, respectively. However, the function of visfatin remains controversial, with conflicting data regarding its role in glucose metabolism and inflammation. This conflicting evidence highlights an urgent need for standardized assays and population-specific studies to clarify its true function. We conclude that while chemerin and omentin-1 represent promising targets, the ambiguity surrounding visfatin limits its current clinical utility, and resolving these knowledge gaps is essential for developing effective biomarkers and therapies for obesity and its comorbidities.

1 December 2006 in Revista da Associação Médica Brasileira
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MTMohamed Ibrahin Ali Taha
Mohamed Ibrahin Ali Taha
WJWilson R. Freitas Júnior
Wilson R. Freitas Júnior
CPCarlos Roberto Puglia
Carlos Roberto Puglia
ALArnaldo Lacombe
Arnaldo Lacombe
CMCarlos Alberto Malheiros
Carlos Alberto Malheiros
This study intended to evaluate predictive factors for cholelithiasis in morbidly obese submitted to gastroplasty with "Y" de Roux reconstruction. The population under study was a group of obese patients enrolled in a program of surgical procedure for morbid obesity at the Department of Surgery, College of Medical Sciences, Santa Casa de São Paulo. The exclusion criteria were: patients previously cholecystectomized, patients with diagnosis of pre-operative cholelithiasis and patients with a questionable ultrasonography about existence of billiary stones. A total of 160 patients were operated, 29 with prior cholecystectomy, 23 with pre-operative biliar lithiasis , 5 with questionable ultrasonography about billiary stones and 103 with normal gallbladders at abdominal ultrasonography. Results showed that (46.6%) of patients developed cholelithiasis, 22 of them symptomatic. When patients with or without cholelithiasis were compared, no significant difference related to age, gender and preoperative weight was observed. The body mass index, the triglycerides serum levels, total cholesterol and the fractions HDL-cholesterol and LDL-cholesterol were higher in the group who developed cholelithiasis compared to patients without gallstones and this difference was statistically significant. The percentage of weight loss in the 6th and 12th postoperative month was significantly higher in patients who developed billiary stones. The study leads to conclude that body mass index, levels of triglycerides, total cholesterol and the fractions LDL and VLDL are predictive factors for cholelithiasis post-gastroplasty with the "Y" de Roux reconstruction.

26 July 2023 in Nutrients
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SMSandra M. B. P. Moreira
Sandra M. B. P. Moreira
Andre BachiAndre Bachi
Andre Bachi
EIElias Jirjoss Ilias
Elias Jirjoss Ilias
CMCarlos Alberto Malheiros
Carlos Alberto Malheiros
SVSergio Vencio
Sergio Vencio
LOLuis V F Oliveira
Luis V F Oliveira
Obesity is a troubling public health problem as it increases risks of sleep disorders, respiratory complications, systemic arterial hypertension, cardiovascular diseases, type 2 diabetes mellitus, and metabolic syndrome (MetS). As a measure to counteract comorbidities associated with severe obesity, bariatric surgery stands out. This study aimed to investigate the adiponectin/leptin ratio in women with severe obesity with and without MetS who had undergone Roux-en-Y gastric bypass (RYGB) and to characterize the biochemical, glucose, and inflammatory parameters of blood in women with severe obesity before and after RYGB. Were enrolled females with severe obesity undergoing RYGP with MetS (n = 11) and without (n = 39). Anthropometric data and circulating levels of glucose, total cholesterol, high-density lipoprotein (HDL), non-HDL total cholesterol, low-density lipoprotein (LDL), adiponectin, and leptin were assessed before and 6 months after RYGB. Significant reductions in weight, body mass index, and glucose, total cholesterol, LDL, and leptin were observed after surgery, with higher levels of HDL, adiponectin, and adiponectin/leptin ratio being observed after surgery compared to the preoperative values of those. This study demonstrated that weight loss induced by RYGB in patients with severe obesity with or without MetS improved biochemical and systemic inflammatory parameters, particularly the adiponectin/leptin ratio.

22 February 2024 in Pharmaceutics
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Thais Bueno Machado de Oliveira SchweigertThais Bueno Machado de Oliveira Schweigert
Thais Bueno Machado de Oliveira Schweigert
JAJoão Pedro Ribeiro Afonso
João Pedro Ribeiro Afonso
Renata Kelly da PalmaRenata Kelly da Palma
Renata Kelly da Palma
Iransé Oliveira-SilvaIransé Oliveira-Silva
Iransé Oliveira-Silva
CSCarlos H. M. Silva
Carlos H. M. Silva
LOLuis V F Oliveira
Luis V F Oliveira
The treatment of peri-implantitis is challenging in the clinical practice of implant dentistry. With limited therapeutic options and drug resistance, there is a need for alternative methods, such as photodynamic therapy (PDT), which is a minimally invasive procedure used to treat peri-implantitis. This study evaluated whether the type of photosensitizer used influences the results of inflammatory control, reduction in peri-implant pocket depth, bleeding during probing, and reduction in bone loss in the dental implant region. We registered the study in the PROSPERO (International Prospective Register of Systematic Review) database. We searched three main databases and gray literature in English without date restrictions. In vivo randomized clinical studies involving individuals with peri-implantitis, smokers, patients with diabetes, and healthy controls were included. PDT was used as the primary intervention. Comparators considered mechanical debridement with a reduction in pocket depth as the primary outcome and clinical attachment level, bleeding on probing, gingival index, plaque index, and microbiological analysis as secondary outcomes. After reviewing the eligibility criteria, we included seven articles out of 266. A great variety of photosensitizers were observed, and it was concluded that the selection of the most appropriate type of photosensitizer must consider the patient’s characteristics and peri-implantitis conditions. The effectiveness of PDT, its effects on the oral microbiome, and the clinical patterns of peri-implantitis may vary depending on the photosensitizer chosen, which is a crucial factor in personalizing peri-implantitis treatment.

10 March 2021 in Einstein (São Paulo)
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ARAntônio Flávio Silva Rodrigues
Antônio Flávio Silva Rodrigues
FKFernando Korkes
Fernando Korkes
DBDanielle de Sá Dantas Bezerra
Danielle de Sá Dantas Bezerra
WJWilson R. Freitas Júnior
Wilson R. Freitas Júnior
LTLuis Gustavo Morato de Toledo
Luis Gustavo Morato de Toledo
Objective: To examine epidemiologic, anthropometric and clinical variables associated with stress urinary incontinence in obese women, before and after bariatric surgery, and to identify predictive factors of stress urinary incontinence resolution. Methods: Prospective observational study with women enrolled in a bariatric surgery program between 2015 and 2016. Patients were assessed prior to and 6 months after bariatric surgery using the International Consultation on Incontinence Questionnaire-Urinary Incontinence Short Form, the Patient Global Impression of Improvement and the Visual Analogue Scale. [...] ABSTRACT Objective: To examine epidemiologic, anthropometric and clinical variables associated with stress urinary incontinence in obese women, before and after bariatric surgery, and to identify predictive factors of stress urinary incontinence resolution. Methods: Prospective observational study with women enrolled in a bariatric surgery program between 2015 and 2016. Patients were assessed prior to and 6 months after bariatric surgery using the International Consultation on Incontinence Questionnaire-Urinary Incontinence Short Form, the Patient Global Impression of Improvement and the Visual Analogue Scale.