Synthesis and characterization of alpha-nickel (II) hydroxide particles on organic-inorganic matrix and its application in a sensitive electrochemical sensor for vitamin D determination

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Bainitic precipitation in the Cu-9 wt.%Al-4 wt.%Mn-5 wt.%Ag alloy

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Metaloproteinases da matriz 2 e 9 em coelhos com cardiomiopatia induzida pela doxorrubicina

Pós-graduação em Medicina Veterinária - FCAV

Detecção de Periodontopatógenos, Glicoproteína Emmprin (Cd-147) e sua correlação com MMP-2 e MMP-9

Periodontitis is an infectious disease characterized by the secretion of a variety of inflammatory mediators that lead to destruction of tooth supporting tissues, including the possible loss of alveolar bone, in association with infection with multiple species of bacteria. It is estimated that more than 400 species colonize the biofilm and some oral species related to periodontal disease is present in the subgingival including P. gingivalis, T. forsythia and T. denticola. However, other organisms may be related of this disease, as Filifactor allocis and Prevotella tannerae. These microorganisms and subproducts such as endotoxins released into the extracellular lead to the stimulation of metalloproteinase inducer glycoprotein (EMMPRIN, CD-147), which stimulates the release of MMPs by host cells, like fibroblasts and endothelial cells, thus leading to tissue destruction. The objective of this study was to detect F. allocis, P. tannerae, T. denticola and the glycoprotein EMMPRIN (CD-147) and its correlation with MMP-2 and MMP-9 in subgingival fluid samples of patients with chronic periodontitis. Fluids were collected from healthy and disease subgingival sites of 20 healthy individuals before basic periodontal treatment and after of 60 days of treatment. Their DNAs were extracted and portions of the 16S gene were amplified and performed conventional PCR. For immunological analysis and quantification of EMMPRIN (CD-147), MMP-2 and MMP-9 was used ELISA-Sandwich. Results demonstrated that the disease group showed significantly high amounts of T. denticola, F. alocis and P. tannerae when compared with health sites. MMP-2 and MMP-9 were detected in high concentrations with statistically significantly reduction after periodontal treatment to MMP-2, but without correlation with EMMPRIN.

Monocyte migration driven by galectin-3 occurs through distinct mechanisms involving selective interactions with the extracellular matrix

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Improved embryonic cryosurvival observed after in vitro supplementation with conjugated linoleic acid is related to changes in the membrane lipid profile

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Alterations of protein expression in conditions of copper-deprivation for Paracoccidioides lutzii in the presence of extracellular matrix components

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Serum vitamin A and inflammatory markers in individuals with and without chronic obstructive pulmonary disease

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

MMP-2 and MMP-9 activities and TIMP-1 and TIMP-2 expression in the prostatic tissue of two ethanol-preferring rat models

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Osteogenic potential of mesenchymal cells derived from canine umbilical cord matrix co-cultured with platelet-rich plasma and demineralized bone matrix

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação e correlação da presença de endotoxinas e MMP-3, -8 e -9 em canais radiculares com necrose pulpar submetidos ao tratamento endodôntico - estudo in vivo

It is know that endotoxin and various matrix metalloproteinases (MMPs) are involved in the development of periapical lesions. The purpose of this study was to evaluate and correlate the presence of endotoxins and MMP- 3, MMP-8 and MMP-9 in root canals of teeth with necrotic pulp and periapical lesion before, during and after the biomechanical preparation (PBM) using a combination of different irrigations solutions and intracanal dressing. Thirty-three single-root teeth with a diagnosis of pulp necrosis and periapical lesion radiographically visible were selected. Immediately after the coronal opening was collected the first sample from the root canal content. Then, all canals were prepared (cervical and middle thirds) by oscillatory instruments (EndoEze) and irrigated by 2.5% NaOCl. After, a manual preparation was made for the apical third and the teeth were divided into three groups according to the irrigation protocol: G1) 2.5% NaOCl (4 manual files); G2) 2.5% NaOCl (2 manual files) + [Ca (OH)2 0.14%] (2 manual files) and G3) 2.5% NaOCl (2 manual files) + polymyxin B (2 manual files). After the PBM, the second sample was collected; then the third collect was performed after using EDTA final flush. The fourth sample was collected 14 days after placing the dressing [2% chlorhexidine gel + Ca(OH)2]. Quantification of endotoxins was performed by a kinetic chromogenic lysate from amoebocytes of Limulus (LAL) and quantification of MMPs by ELISA assay. The results were analyzed statistically by Kruskal-Wallis and Dunn's test (5%) and ordinal Spearman correlation. Presence of endotoxin was observed in 100% of cases and G3 showed the greatest reduction of endotoxins from the 1st to the 2nd samples (97%), being statistically similar to G2 (84.2%) and different from G1 (49.4%) (p<0.05). The intracanal dressing promoted a significant reduction of endotoxin, no difference among the groups. For...

Protein phosphatase activities in the serum and saliva of healthy children

The purpose of this study was to investigate the activities of the total acid phosphatase (TAP), tartrate-resistant acid phosphatase (TRAP), low molecular weight protein tyrosine phosphatase (LMW-PTP) and alkaline phosphatase (ALP) enzymes, as well as the possible correlation in the serum and in unstimulated whole saliva of children. Enzymatic activities were measured in pairs of concurrently obtained serum and salivary samples from 32 children in good oral and systemic health (16 of each sex) with a median age of 6.4 ± 3.3 years (range 1.08 – 12.92 years). All collections were made between the hours of 08:00 – 10:00 a.m. We used p-nitrophenyl phosphate as the substrate in the enzymatic assay for TAP, TRAP and LMW-PTP, and thymolphthalein monophosphate as the substrate for ALP. The enzymatic activities of all the studied enzymes were higher in serum than in saliva. The mean of enzymatic activities of serum TAP, TRAP, LMW-PTP and ALP were 36.51 ± 8.21, 23.99 ± 5.73, 11.16 ± 5.65 and 76.50 ± 17.32 U/L, respectively, while the mean salivary TAP, TRAP, LMW-PTP and ALP enzymatic activities were 9.60 ± 5.04, 1.36 ± 0.87, 5.65 ± 3.07 and 4.08 ± 1.83 U/L in this order. The TRAP revealed a positive linear correlation between its activity in the serum and saliva (Spearman r = 0,4685, p < 0,05). We concluded that the salivary TRAP has a potential to be use as biomarkers of pathologies and states that modify its activity in the serum.

Avaliação clínico-laboratorial e da expressão de metaloproteinases 2 e 9 de equinos com obstrução experimental do cólon menor

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Serum protein profile of hookworm infection in dogs

Hookworms are parasitic nematodes that cause anemia and intestinal infections in dogs, especially with large worm burdens. However, the serum protein profile of this parasitological disease is still poorly understood. The present study was design to evaluate 80 asymptomatic dogs (age; 8 months–2 years) to detect the presence of the hookworm thin-shelled, morulated eggs in faeces using faecal flotation and to evaluate the serum protein fractions determined by means of sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE). Forty dogs had an elevated quantity of eggs in faeces (+++) (PD) and 40 dogs were healthy (HD). Infected dogs showed significant increases for IgG estimated concentrations (PD 1.79±0.8 g/dL and HD 1.44±0.72 g/dL, p= 0.04), for ceruloplasmin estimated concentrations (PD 19±15 mg/dL and HD 5±3.5 mg/dL, p=0.0001), for alpha 1-acid glycoprotein estimated concentrations (PD 31.4±17.9 mg/dL and HD 13.5±12.1 mg/dL, p=0.0001) and for a non-identified protein of 23 kDa estimated concentrations (PD 641.5±194.9 mg/dL and HD 519.8± 197.9 mg/dL, p=0.007). Dogs with hookworm infection showed significant differences in the serum protein profile when compared to healthy animals.

Evaluation of the Effects of a Preoperative 2-Hour Fast With Maltodextrine and Glutamine on Insulin Resistance, Acute-Phase Response, Nitrogen Balance, and Serum Glutathione After Laparoscopic Cholecystectomy: A Controlled Randomized Trial

Background: Prolonged preoperative fasting increases insulin resistance (IR). The authors investigated whether an abbreviated preoperative fast with glutamine (GLN) plus a carbohydrate (CHO)-based beverage would improve the organic response after surgery. Methods: Forty-eight female patients (19-62 years) were randomized to either standard fasting (control group) or to fasting with 1 of 3 different beverages before video-cholecystectomy. Beverages were consumed 8 hours (400 mL; placebo group: water; GLN group: water with 50 g maltodextrine plus 40 g GLN; and CHO group: water with 50 g maltodextrine) and 2 hours (200 mL; placebo: water; GLN: water with 25 g maltodextrine plus 10 g GLN; and CHO: water with 25 g maltodextrine) before anesthesia. Blood samples were collected pre- and postoperatively. Results: The mean (SEM) postoperative homeostasis model assessment-insulin resistance was greater (P < .05) in control patients (4.3 [1.3]) than in the other groups (placebo, 1.6 [0.3]; CHO, 2.3 [0.4]; and GLN, 1.5 [0.1]). Glutathione was significantly higher (P < .01) in the GLN group than in both CHO and control groups. Interleukin-6 increased in all groups except the GLN group. The C-reactive protein/albumin ratio was higher (P < .05) in controls than in CHO and GLN groups. The nitrogen balance was less negative in GLN (-2.5 [0.8] gN) than in both placebo (-9.0 [2] gN; P = .001) and control (-6.6 [0.4] gN; P = .04) groups. Conclusions Preoperative intake of a GLN-enriched CHO beverage appears to improve IR and antioxidant defenses and decreases the inflammatory response after video-cholecystectomy. (JPEN J Parenter Enteral Nutr. 2012; 36: 43-52)