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Histopathological analysis of rat mesentery as a method for evaluating neutrophil migration: differential effects of dexamethasone and pertussis toxin BJMBR
Brito,G.A.C.; Falcão,J.L.A.A.; Saraiva,S.N.R.; Lima,A.A.M.; Flores,C.A.; Ribeiro,R.A..
In the present study, histopathological analysis of rat mesentery was used to quantify the effect of two anti-inflammatory agents, dexamethasone (Dex) and pertussis toxin (Ptx), on leukocyte migration. The intravenous injection of Dex (1 mg/kg) and Ptx (1,200 ng) 1 h prior to the intraperitoneal injection of the inflammatory stimuli lipopolysaccharide (LPS) or formyl-methionyl-leucyl-phenylalanine (fMLP) significantly reduced the neutrophil diapedesis (LPS: Ptx = 0.86 ± 0.19 and Dex = 0.35 ± 0.13 vs saline (S) = 2.85 ± 0.59; fMLP: Ptx = 0.43 ± 0.09 and Dex 0.01 ± 0.01 vs S = 1.08 ± 0.15 neutrophil diapedesis/field) and infiltration (LPS: Ptx = 6.29 ± 1.4 and Dex = 3.06 ± 0.76 vs S = 15.94 ± 3.97; fMLP: Ptx = 3.85 ± 0.56 and Dex = 0.40 ± 0.16 vs S = 7.15 ±...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neutrophil migration; Pertussis toxin; LPS; Dexamethasone; Mesentery; Histopathological approach.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998001000013
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Long-term ethanol intoxication reduces inflammatory responses in rats BJMBR
Carvalho,E.M.; Brito,G.A.C.; Pessoa,B.B.G.P.; Ribeiro,R.A.; Capaz,F.R..
The anti-inflammatory effects of long-term ethanol intoxication were determined during ethanol treatment and withdrawal on the basis of neutrophil and eosinophil migration, hind paw edema and mast cell degranulation. Male Wistar rats (180-200 g, around 2 months of age) were exposed to increasing concentrations of ethanol vapor over a 10-day period. One group was evaluated immediately after exposure (treated group - intoxicated), and another was studied 7 h later (withdrawal group). Ethanol inhalation treatment significantly inhibited carrageenan- (62% for the intoxicated group, N = 5, and 35% for the withdrawal group, N = 6) and dextran-induced paw edema (32% for intoxicated rats and 26% for withdrawal rats, N = 5 per group). Ethanol inhalation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ethanol; Inflammation; Carrageenan; Dextran; Air-pouch; Mast cells.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000100013
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Comparison of etoricoxib and indomethacin for the treatment of experimental periodontitis in rats BJMBR
Azoubel,M.C.F.; Menezes,A.M.A.; Bezerra,D.; Oriá,R.B.; Ribeiro,R.A.; Brito,G.A.C..
We investigated the effect of etoricoxib, a selective cyclooxygenase-2 inhibitor, and indomethacin, a non-selective cyclooxygenase inhibitor, on experimental periodontitis, and compared their gastrointestinal side effects. A ligature was placed around the second upper left molars of female Wistar rats (160 to 200 g). Animals (6 per group) were treated daily with oral doses of 3 or 9 mg/kg etoricoxib, 5 mg/kg indomethacin, or 0.2 mL saline, starting 5 days after the induction of periodontitis, when bone resorption was detected, until the sacrifice on the 11th day. The weight and survival rate were monitored. Alveolar bone loss (ABL) was measured as the sum of distances between the cusp tips and the alveolar bone. The gastric mucosa was examined...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alveolar bone loss; Inflammation; Periodontitis; Cyclooxygenase inhibitors; Etoricoxib; Indomethacin.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000100015
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Alanyl-glutamine attenuates 5-fluorouracil-induced intestinal mucositis in apolipoprotein E-deficient mice BJMBR
Araújo,C.V.; Lazzarotto,C.R.; Aquino,C.C.; Figueiredo,I.L.; Costa,T.B.; de Oliveira Alves,L.A.; Ribeiro,R.A.; Bertolini,L.R.; Lima,A.A.M.; Brito,G.A.C.; Oriá,R.B..
Apolipoprotein E (APOE=gene, apoE=protein) is a known factor regulating the inflammatory response that may have regenerative effects during tissue recovery from injury. We investigated whether apoE deficiency reduces the healing effect of alanyl-glutamine (Ala-Gln) treatment, a recognized gut-trophic nutrient, during tissue recovery after 5-FU-induced intestinal mucositis. APOE-knockout (APOE-/-) and wild-type (APOE+/+) C57BL6J male and female mice (N=86) were given either Ala-Gln (100 mM) or phosphate buffered saline (PBS) by gavage 3 days before and 5 days after a 5-fluorouracil (5-FU) challenge (450 mg/kg, via intraperitoneal injection). Mouse body weight was monitored daily. The 5-FU cytotoxic effect was evaluated by leukometry. Intestinal villus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Apolipoprotein E; 5-Fluorouracil; Alanyl-glutamine; Mucositis; Mice.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000600493
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In vivo and in vitro anti-inflammatory and anti-nociceptive activities of lovastatin in rodents BJMBR
Gonçalves,D.O.; Calou,I.B.F.; Siqueira,R.P.; Lopes,A.A.; Leal,L.K.A.; Brito,G.A.C.; Tomé,A.R.; Viana,G.S.B..
Statins are among the most prescribed drugs in recent clinical practice. They are also known for their pleiotropic actions, which are independent of their lipid-lowering properties. The effect of lovastatin was investigated against carrageenan-induced paw edema in male Wistar rats (200-250 g) and on leukocyte migration, as measured by carrageenan-induced peritonitis in male Swiss mice (20-25 g), which are models of acute inflammation. Lovastatin (administered 1 h prior to carrageenan), at oral doses of 2, 5, and 10 mg/kg, markedly attenuated paw edema formation in rats at the 4th hour after carrageenan injection (25, 43, and 37% inhibition, respectively). Inhibitions of 20, 45 and 80% were observed in the leukocyte migration, as evaluated by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Statin; Inflammation; Anti-nociception; Myeloperoxidase; Cytokines.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000200011
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Impact of acute undernutrition on growth, ileal morphology and nutrient transport in a murine model BJMBR
Sampaio,I.C.; Medeiros,P.H.Q.S.; Rodrigues,F.A.P.; Cavalcante,P.A.; Ribeiro,S.A.; Oliveira,J.S.; Prata,M.M.G.; Costa,D.V.S.; Fonseca,S.G.C.; Guedes,M.M.; Soares,A.M.; Brito,G.A.C.; Havt,A.; Moore,S.R.; Lima,A.A.M..
Undernutrition represents a major public health challenge for middle- and low-income countries. This study aimed to evaluate whether a multideficient Northeast Brazil regional basic diet (RBD) induces acute morphological and functional changes in the ileum of mice. Swiss mice (∼25 g) were allocated into two groups: i) control mice were fed a standard diet and II) undernourished mice were fed the RBD. After 7 days, mice were killed and the ileum collected for evaluation of electrophysiological parameters (Ussing chambers), transcription (RT-qPCR) and protein expression (western blotting) of intestinal transporters and tight junctions. Body weight gain was significantly decreased in the undernourished group, which also showed decreased crypt depth but no...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Undernutrition; Ion transport; Intestinal absorption.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016001000607
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Low-dose doxycycline prevents inflammatory bone resorption in rats BJMBR
Bezerra,M.M.; Brito,G.A.C.; Ribeiro,R.A.; Rocha,F.A.C..
Matrix metalloproteinases (MMP) are considered to be key initiators of collagen degradation, thus contributing to bone resorption in inflammatory diseases. We determined whether subantimicrobial doses of doxycycline (DX) (<=10 mg kg-1 day-1), a known MMP inhibitor, could inhibit bone resorption in an experimental periodontitis model. Thirty male Wistar rats (180-200 g) were subjected to placement of a nylon thread ligature around the maxillary molars and sacrificed after 7 days. Alveolar bone loss (ABL) was measured macroscopically in one hemiarcade and the contralateral hemiarcade was processed for histopathologic analysis. Groups of six animals each were treated with DX (2.5, 5 or 10 mg kg-1 day-1, sc, 7 days) and compared to nontreated (NT) rats. NT...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Tetracyclines; Doxycycline; Metalloproteinases; Periodontitis; Osteoporosis; Bone resorption; Inflammation.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000500015
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Amifostine reduces inflammation and protects against 5-fluorouracil-induced oral mucositis and hyposalivation BJMBR
Barbosa,S.C.M.; Pereira,V.B.M.; Wong,D.V.T.; Santana,A.P.M.; Lucetti,L.T.; Carvalho,L.L.; Barbosa,C.R.N.; Callado,R.B.; Silva,C.A.A.; Lopes,C.D.H.; Brito,G.A.C.; Alencar,N.M.N.; Lima-Júnior,R.C.P..
Oral mucositis (OM) is a common and dose-limiting side effect of cancer treatment, including 5-fluorouracil (5-FU) and radiotherapy. The efficacy of the therapeutic measures to prevent OM is limited and disease prevention is not fully observable. Amifostine is a cytoprotective agent with a described anti-inflammatory potential. It is clinically used to reduce radiotherapy and chemotherapy-associated xerostomia. This study investigated the protective effect of amifostine on an experimental model of OM. Hamsters were divided into six groups: saline control group (5 mL/kg), mechanical trauma (scratches) of the right cheek pouch; 5-FU (60 and 40 mg/kg, ip, respectively, administered on days 1 and 2); amifostine (12.5, 25, or 50 mg/kg) + 5-FU + scratches....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cancer chemotherapy toxicity; Oral mucositis; 5-Fluorouracil; Amifostine; Cytokines.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019000300601
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Pharmacological and histopathological study of cyclophosphamide-induced hemorrhagic cystitis - comparison of the effects of dexamethasone and Mesna BJMBR
Morais,M.M.; Belarmino-Filho,J.N.; Brito,G.A.C.; Ribeiro,R.A..
Chemotherapy with oxazaphosphorines, such as cyclophosphamide (CYP), is often limited by unacceptable urotoxicity. Without uroprotection, hemorrhagic cystitis (HC) becomes dose-limiting. To compare the uroprotective efficacy of classical 2-mercaptoethanesulfonic acid (Mesna) treatment with dexamethasone in CYP-induced HC, male Wistar rats (150-200 g; N = 6 in each group) were treated with saline or Mesna (40 mg/kg, ip) immediately and 4 and 8 h after ip administration of CYP (200 mg/kg). One, 2 or 3 doses of Mesna were replaced with dexamethasone (1 mg/kg, ip). The animals were sacrificed 24 h later. Cystitis was evaluated by determining the changes in bladder wet weight (BWW) and by macroscopic and microscopic analysis. CYP treatment induced a marked...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Cyclophosphamide; Hemorrhagic cystitis; Dexamethasone; Mesna.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999001000006
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A model of hemorrhagic cystitis induced with acrolein in mice BJMBR
Batista,C.K.L.P.; Brito,G.A.C.; Souza,M.L.P.; Leitão,B.T.A.; Cunha,F.Q.; Ribeiro,R.A..
Acrolein is a urinary metabolite of cyclophosphamide and ifosfamide, which has been reported to be the causative agent of hemorrhagic cystitis induced by these compounds. A direct cytotoxic effect of acrolein, however, has not yet been demonstrated. In the present study, the effects of intravesical injection of acrolein and mesna, the classical acrolein chemical inhibitor, were evaluated. Male Swiss mice weighing 25 to 35 g (N = 6 per group) received saline or acrolein (25, 75, 225 µg) intravesically 3, 6, 12, and 24 h before sacrifice for evaluation of bladder wet weight, macroscopic and histopathological changes by Gray's criteria, and 3 and 24 h for assessment of increase in vascular permeability. In other animals, mesna was administered intravesically...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acrolein; Bladder; Hemorrhagic cystitis; Mesna.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006001100011
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Antimicrobial activity of the essential oil from Lippia sidoides, carvacrol and thymol against oral pathogens BJMBR
Botelho,M.A.; Nogueira,N.A.P.; Bastos,G.M.; Fonseca,S.G.C.; Lemos,T.L.G.; Matos,F.J.A.; Montenegro,D.; Heukelbach,J.; Rao,V.S.; Brito,G.A.C..
Dental caries and periodontal disease are associated with oral pathogens. Several plant derivatives have been evaluated with respect to their antimicrobial effects against such pathogenic microorganisms. Lippia sidoides Cham (Verbenaceae), popularly known as "Alecrim-pimenta" is a typical shrub commonly found in the Northeast of Brazil. Many plant species belonging to the genus Lippia yield very fragrant essential oils of potential economic value which are used by the industry for the commercial production of perfumes, creams, lotions, and deodorants. Since the leaves of L. sidoides are also extensively used in popular medicine for the treatment of skin wounds and cuts, the objective of the present study was to evaluate the composition and antimicrobial...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lippia sidoides; Essential oil; Antimicrobial activity; Oral pathogens.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000300010
Registros recuperados: 11
Primeira ... 1 ... Última
 

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