Publications by authors named "Raul Lopes Ruiz Junior"

6 Publications

  • Page 1 of 1

Enhanced expression of NLRP3 inflammasome components by monocytes of patients with pulmonary paracoccidioidomycosis is associated with smoking and intracellular hypoxemia.

Microbes Infect 2020 04 23;22(3):137-143. Epub 2019 Nov 23.

São Paulo State University (UNESP), Medical School, Botucatu, SP, Brazil; Federal University of Mato Grosso do Sul (UFMS), Medical School, Campo Grande, MS, Brazil. Electronic address:

Paracoccidioidomycosis (PCM) is a systemic mycosis caused by thermally dimorphic fungi of the genus Paracoccidioides that affects predominantly 30-60-year-old male rural workers. The main clinical forms of the disease are acute/subacute, chronic (CF); almost all CF patients develop pulmonary fibrosis, and they also exhibit emphysema due to smoke. An important cytokine in this context, IL-1β, different from the others, is produced by an intracellular multimolecular complex called inflammasome that is activated by pathogens and/or host signs of damage. Inflammasome has been recognized for its contribution to chronic inflammatory diseases, from that, we hypothesized that this activation could be involved in paracoccidioidomycosis, contributing to chronic inflammation. While inflammasome activation has been demonstrated in experimental models of Paracoccidioides brasiliensis infection, no information is available in patients, leading us to investigate the participation of NLRP3-inflammasome machinery in CF/PCM patients from a Brazilian endemic area. Our findings showed increased priming in mRNA levels of NLRP3 inflammasome genes by monocytes of PCM patients in vitro than healthy controls. Similar intracellular protein expression of NLRP3, CASP-1, ASC, and IL-1β were also observed in freshly isolated monocytes of PCM patients and smoker controls. Increased expression of NLRP3 and ASC was observed in monocytes from PCM patients under hypoxia in comparison with smoker controls. For the first time, we showed that primed monocytes of CF-PCM patients were associated with enhanced expression of components of NLRP3-inflammasome due to smoke. Also, hypoxemia boosted this machinery. These findings reinforce the systemic low-grade inflammation activation observed in PCM during and after treatment.
View Article and Find Full Text PDF

Download full-text PDF

Source Listing
April 2020

Light-emitting diode effects on combined decellularization of tracheae. A novel approach to obtain biological scaffolds.

Acta Cir Bras 2014 Aug;29(8):485-92

Department of Urology, Medical School, UNESP, Botucatu, SP, Brazil.

Purpose: To obtain a decellularized tracheal scaffold associating traditional approaches with the novel light-emitting diode (LED) proposal.

Methods: This study was performed with New Zealand adult rabbits weighing 3.0 - 4.0 kg. Different protocols (22) were used combining physical (agitation and LED irradiation), chemical (SDS and Triton X-100 detergents), and enzymatic methods (DNase and RNase).

Results: Generally, the cells surrounding soft tissues were successfully removed, but none protocol removed cells from the tracheal cartilage. However, longer protocols were more effective. The cost-benefits relation of the enzymatic processes was not favorable. It was possible to find out that the cartilaginous tissue submitted to the irradiation with LED 630nm and 475 nm showed an increased number of gaps without cells, but several cells were observed to be still present.

Conclusion: The light-emitting diode is a promising tool for decellularization of soft tissues.
View Article and Find Full Text PDF

Download full-text PDF

Source Listing
August 2014

Oslerus osleri (Cobbold, 1876) infection in maned wolf (Chrysocyon brachyurus, illiger, 1815).

J Zoo Wildl Med 2012 Sep;43(3):674-7

Department of Veterinary Clinics, Univ Estadual Paulista (UNESP), School of Veterinary Medicine and Animal Science, Botucatu, P.O. Box 560, Rubião Júnior s/n, Botucatu (SP), Brazil 18618-000.

Oslerus osleri is a small nematode that infects the respiratory tract of domestic and wild canids and is responsible for causing chronic nodular tracheobronchitis. This paper aims to report a case of parasitism by O. osleri in a free-living maned wolf (Chrysocyon brachyurus) that was struck by a motor vehicle. Fecal samples were collected, and the presence of spiral larvae, with "S"-shaped tails, was observed on flotation. This characteristic was compatible with the Filaroididae Family larvae of O. osleri. Although the animal did not show clinical signs of respiratory system impairment, a tracheobronchoscopy was performed. Semitransparent nodules, 5 mm in diameter, containing adult parasites were observed in the third distal portion of the trachea, cranial to the carina. Larval morphological characteristics and the nodular locations were compatible with an O. osleri respiratory tract infection.
View Article and Find Full Text PDF

Download full-text PDF

Source Listing
September 2012

Surgical treatment of pulmonary aspergilloma.

J Bras Pneumol 2010 Nov-Dec;36(6):779-83

Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil.

The objective of this study was to analyze the outcome of surgical treatment of pulmonary aspergilloma. To that end, we evaluated 14 adult patients so treated between 1981 and 2009 at the Botucatu School of Medicine University Hospital, in the city of Botucatu, Brazil. Data were collected from the medical records of the patients. Ten patients (71%) presented with simple pulmonary aspergilloma, and 4 (29%) presented with complex pulmonary aspergilloma. Hemoptysis was the most common symptom, and tuberculosis was the most prevalent preexisting lung disease. Two patients (14%) underwent surgery on more than one occasion. There were no intraoperative deaths. Half of the patients developed postoperative complications, prolonged air leak and empyema being the most common.
View Article and Find Full Text PDF

Download full-text PDF

Source Listing
August 2011

Lung cancer: histology, staging, treatment and survival.

J Bras Pneumol 2008 Aug;34(8):595-600

Department of Surgery, Universidade Estadual Paulista, Botucatu School of Medicine, Botucatu, Brazil.

Objective: To analyze principal histological types of lung cancer, as well as the staging, treatment and survival of lung cancer patients.

Methods: This was a retrospective study based on the analysis of medical charts of patients treated at the Botucatu School of Medicine Hospital das Clínicas over a six-year period.

Results: From January of 2000 to January of 2006, 240 patients with lung cancer, most (64%) of whom were male, were treated. The most common histological type was squamous cell carcinoma (37.5%), followed by adenocarcinoma (30%), neuroendocrine carcinoma (19.6%) and large cell carcinoma (6.6%). Only 131 patients (54.6%) were treated. Of those, 52 patients (39.7%) received only chemotherapy, 32 (24.4%) were treated with chemotherapy combined with radiotherapy, and 47 (35.9%) were submitted to surgery alone or surgery accompanied by chemotherapy, with or without radiotherapy. Only 27 patients (20.6%) were submitted to surgery alone. Concerning staging, 34.4% presented stage IV at the time of diagnosis, 20.6% presented stage IIIB, 16.8% presented stage IIIA, and the remaining 28.2% were classified as stage I or II. Five-year survival was 65% for those in stage I and 25% for those in the remaining stages.

Conclusions: Of the various histological types, the most common was squamous cell carcinoma and the least common was large cell carcinoma. Most cases presented advanced stages at the moment of diagnosis, and less than 30% of the cases presented early stages. This accounts for the low survival rate and the small number of patients submitted to surgical treatment alone, the majority being submitted to chemotherapy alone.
View Article and Find Full Text PDF

Download full-text PDF

Source Listing
August 2008

Compensatory lung growth: protein, DNA and RNA lung contents in undernourished trilobectomized rats.

Acta Cir Bras 2005 May-Jun;20(3):219-24

Department of Orthopedics and Surgery, State University of São Paulo (UNESP), Botucatu, SP, Brazil.

Purpose: To demonstrate compensatory lung growth (CLG) by lung contents of proteins, DNA, and RNA in undernourished young adult rats, submitted to pulmonary trilobectomy.

Methods: We used 137 male Wistar rats, randomly distributed into 9 groups; they were submitted to three treatments (control, thoracotomy, and trilobectomy), and sacrificed at three different times (7, 30, and 90 days). In trilobectomy we removed the right median, accessory, and caudal lobes. We studied lung proteins, DNA, and RNA contents.

Results: In the cranial lobe and left lung, protein content was higher in trilobectomized rats however there was insufficient CLG to make up for the loss. The increase of DNA in the cranial lobe and left lung of trilobectomized rats was sufficient to compensate for this loss, resulting in a similar content to controls. RNA content in trilobectomized rats, was higher in the cranial lobe and left lung, more efficient in the cranial lobe, but less than in the other groups.

Conclusions: CLG occurred in trilobectomized rats, probably with cell hyperplasia and little hypertrophy, due to the large DNA compensation and small RNA compensation. This was markedly different to well-nourished animals, who had pronounced hypertrophy.
View Article and Find Full Text PDF

Download full-text PDF

Source Listing
November 2005