Consulta: subjectFacets:"Dexamethasone"
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Data/hora: 05/06/2024 14:11:25

Morphological Analysis of Neonates of Rats Treated with Dexamethasone in the Initial Phase of Pregnancy
Provedor de dados: 77
Autores: Vilaça Júnior,Paulo Estevao Araújo; Teixeira,Alvaro Aguiar Coelho; Wanderley Teixeira,Valéria; Moraes,Eleonora de Figueiredo; Araújo,Ana Claudia Carvalho de; Maia,Carina Scanoni.
The glucocorticoid dexamethasone has been largely used due to its anti-inflammatory effect. However, several authors report that the excessive exposition to it during pregnancy may cause a retard in the development in several tissues, mainly: liver, lungs and kidneys. But, the majority of the works are done with the application of dexamethasone in the late periods of pregnancy. Because of the lack of researches that evalúate the effects in the beginning of gestation, this paper aimed at evaluating the effect of dexamethasone administered in the initial phase of pregnancy, o ver the morphology of neonates rat. It was used 10 albino rats (Rattus norvegicus albinus) aged 90 days from the lineage Wistar. The female were coupled and divided in two groups: Group...
Tipo: Journal article
Palavras-chave: Pregnancy; Dexamethasone; Histology; Rats.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000300002

Neuroprotective Effect of Dexamethasone on the Morphology of the Irradiated Post Natal Developing Cerebellum of Wistar Rat (Rattus norvegicus)
Provedor de dados: 77
Autores: Malomo,A. O.; Ekpo,O. E.; Imosemi,I. O.; Owoeye,O.; Osuagwu,F. C.; Avwioro,O. G.; Shokunbi,M.T.
The neuroprotective effect of dexamethasone on the irradiated postnatal developing cerebellum of Wistar rat was studied. Seventy-five (day 1 old) neonates were separated into three groups; control group receiving no drug and no irradiation, irradiated group, and irradiated and dexamethasone group in which the dexamethasone was administered one hour before exposure to 5Gray (5Gy) of gamma rays. On complete exposure to the various interventions, the cerebellar tissues of animals from each group on days 5, 9, 14, 21 and 25 were processed for histological and histomorphometric studies. The result of the study showed that irradiation alone significantly reduced the thickness of the external granular layer (EGL) on day 5 and 14 at P&lt;0.05, molecular layer (ML)...
Tipo: Journal article
Palavras-chave: Morphology; Irradiation; Dexamethasone; Developing cerebellum.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000300017

Histological Evaluation of the Induced Endometriosis in Rats, after Treatment with Dexamethasone
Provedor de dados: 77
Autores: Batista,Ana Paula Castor; Conceição,Ana Paula Maria da; Moraes,Eleonora de Figueiredo; Teixeira,Álvaro Aguiar Coelho; Wanderley Teixeira,Valéria.
The present research had the purpose to analyze morphologically the sites of endometrial implants on the external area of the musculature of the anterior abdominal wall of female rats, treated with dexamethasone. For so, these 15 albino female rats were used (Rattus norvegicus albinus), of the lineage Wistar with 90 days of age, that were submitted to the induction of the endometriosis, and divided in the following groups: Group I ­ induced female rats to endometriosis and evaluated after 21 days (control); Group II ­ induced female rats to endometriosis and after 21 days, treated with dexamethasone for 10 days; Group III - induced female rats to endometriosis, and after 21 days, treated with dexamethasone for 15 days. The dexamethasone was administered in...
Tipo: Journal article
Palavras-chave: Endometriosis; Dexamethasone; Steriods; Hormones; Metaplasia.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000500008

Effect of the Treatment with Dexamethasone, for 10 and 15 Days, on the Fertility in Induced Rats to Polycystic Ovaries, by Constant Illumination
Provedor de dados: 77
Autores: Moraes,Eleonora de Figueiredo; Wanderley Teixeira,Valéria; Teixeira,Álvaro Aguiar Coelho; Silva,Welma Emídio da; Batista,Ana Paula Castor; Lemos,Ana Janaína Jeanine Martins de.
The present study had the objective of obtaining information about fertility in rats treated with dexamethasone for 10 and 15 days consecutively, to polycystic ovaries, induced by constant illumination. It was used 40 albino rats (Rattus norvegicus albinus), aged 90 days, form the lineage Wistar, which were split, randomly, in four groups, each constituted of 10 animals, namely: Group I - rats kept in a clear/dark cycle for 12/12 hours, and after 100 days submitted to fertility evaluation (control); Group II - rats kept under constant illumination during 100 days and then submitted to fertility evaluation; Group III - rats kept under constant illumination during 100 days, then treated with dexamethasone for 10 days and submitted to fertility evaluation;...
Tipo: Journal article
Palavras-chave: Fertility; Polycystic ovaries; Dexamethasone; Rats.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000300024

Evaluation of the Estral Cycle in Rats after Treatmen twith Dexamethasone for Polycystic Ovaries, Induced by Constant Illumination
Provedor de dados: 77
Autores: Barros,Heitor Arôxa; Moraes,Eleonora Figueredo de; Maia,Carina Scanoni; Teixeira,Álvaro Aguiar Coelho; Teixeira,ValériaWanderley.
The study aimed at obtaining basic information about estrous cycle in rats treated with dexamethasone, for polycystic ovaries, induced by constant illumination. It was used 30 female rats (Rattus norvegicus albinus) from the lineage Wistar, with 90 days years old, divided according the following groups: Group I - rats maintained in a light/dark cycle for 12/12 hours, and after 100 days submitted to the cyclicity evaluation (control); Group II - rats maintained under constant illumination during 100 days and after submitted to the cyclicity evaluation; Group III - rats maintained under constant illumination during 100 days and after treated with dexamethasone for five days, and, then, submitted to the cyclicity evaluation. The results showed that after 100...
Tipo: Journal article
Palavras-chave: Estrous cycle; Polycystic ovaries; Dexamethasone; Rats.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000400035

Effects of diclofenac and dexamethasone on horse experimental endotoxemia
Provedor de dados: 45
Autores: Rosa,P.C.S.; Peiró,J.R.; Campebell,R.C.; Valadão,C.A.A.; Bechara,G.H.
Fifteen healthy Mangalarga horses, aged two to three years were used to evaluate the possible beneficial effects of dexamethasone and sodium diclofenac administration during experimental endotoxemia in horses. They were divided into three groups with five animals each: control (C), sodium diclofenac (SD) and dexamethasone (DM). All groups were given 0.1µg of Escherichia coli O55:B5 endotoxin/kg of body weight, intravenous, over 15 minutes, and one of the following preparations: group C - 20ml of 0.9% saline intravenous, 30 minutes before endoxin infusion; group SD - 2.2mg/kg, per os, 60 minutes before endotoxin infusion and group DM - 1.1 mg/kg, intravenous, 30 minutes before endotoxin infusion. No increase in rectal temperature was observed in the SD or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endotoxemia; Equine; Peritoneal fluid; Sodium diclofenac; Dexamethasone.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352003000300006

Insulin signaling proteins in pancreatic islets of insulin-resistant rats induced by glucocorticoid
Provedor de dados: 48
Autores: De Paula,Flávia MM; Boschero,Antonio C; Carneiro,Everardo M; Bosqueiro,José R; Rafacho,Alex.
Chronic administration of glucocorticoids induces insulin resistance that is compensated by an increase in p-cell function and mass. Since insulin signaling is involved in the control of p-cell function and mass, we investigated the content of insulin pathway proteins in pancreatic islets. Rats were made insulin resistant by daily administration of dexamethasone (1mg/kg, b.w., i.p.) for 5 consecutive days (DEX), whilst control rats received saline (CTL). Circulating insulin and insulin released from isolated islets were measured by radioimmunoassay whereas the content of proteins was analyzed by Western blotting. DEX rats were hyperinsulinemic and exhibited augmented insulin secretion in response to glucose (P &lt; 0.01). The IRa-subunit, IRS-1, Shc, AKT,...
Tipo: Journal article
Palavras-chave: Dexamethasone; Glucocorticoid; Insulin resistance; Insulin signaling; Pancreatic islets.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000300006

Histopathological analysis of rat mesentery as a method for evaluating neutrophil migration: differential effects of dexamethasone and pertussis toxin
Provedor de dados: 56
Autores: 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

Beneficial effects of Cuscuta chinensis extract on glucocorticoid-induced osteoporosis through modulation of RANKL/OPG signals
Provedor de dados: 56
Autores: Mo,Hui; Zhang,Ning; Li,Huifu; Li,Fan; Pu,Rong.
Cuscuta chinensis Lam. (Convolvulaceae) is an important herbal medicine widely used to improve sexual function, treat osteoporosis, and prevent aging, and has been reported to exhibit anti-osteoporotic effects in vitro. However, the activity of Cuscuta chinensis Lam. on glucocorticoid-induced osteoporosis still remains unclear. The present study aimed to assess the protective effect and the underlying mechanism of action of Cuscuta chinensis extract (CCE) against glucocorticoid-induced osteoporosis in vivo. Sprague-Dawley rats were randomly divided into four groups as follows: control group, osteoporosis group, and 2 CCE-treated osteoporosis groups (100 mg·kg-1·day-1). Blood samples and femur bones were collected for immunohistochemistry, biochemical, mRNA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dexamethasone; Oxidative status; Bone formation; Anti-osteoporosis; RunX2.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019001200612

Dexamethasone and sodium carboxymethyl cellulose prevent postoperative intraperitoneal adhesions in rats
Provedor de dados: 56
Autores: Du,X.H.; Liu,J.Q.; Xin,K.; Liu,G.H.
We aimed to evaluate the effects of the barrier agent sodium carboxymethyl cellulose (SCMC) with and without dexamethasone for the prevention of postoperative adhesion formation in a rat model of postoperative peritoneal adhesion. A total of 160 three-month old male and female Wistar rats underwent a laparotomy, and adhesions were induced by ileocecal abrasion. Rats were randomly assigned to 4 groups (n=40 each): group A, untreated; group B, treated with SCMC only; group C1, treated with SCMC + 3 mg dexamethasone, and group C2, treated with SCMC + 8 mg dexamethasone. After 12 days, adhesion formation and histopathological changes were compared. In groups A, B, C1, and C2, the mortality rates were 10, 5, 5, and 5%, respectively. In groups C1 and C2, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dexamethasone; Sodium carboxymethyl cellulose; Adhesions.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000400344

Efficacy and safety of combined piroxicam, dexamethasone, orphenadrine, and cyanocobalamin treatment in mandibular molar surgery
Provedor de dados: 56
Autores: Barroso,A.B.; Lima,V.; Guzzo,G.C.; Moraes,R.A.; Vasconcellos,M.C.; Bezerra,M.M.; Viana,F.A.L.; Bezerra,R.C.R.; Santana,G.S.M.; Frota-Bezerra,F.A.; Moraes,M.O.; Moraes,M.E.A.
Third molar extraction is a common procedure frequently accompanied by moderate or severe pain, and involves sufficient numbers of patients to make studies relatively easy to perform. The aim of the present study was to determine the efficacy and safety of the therapeutic combination of 10 mg piroxicam, 1 mg dexamethasone, 35 mg orphenadrine citrate, and 2.5 mg cyanocobalamin (Rheumazin®) when compared with 20 mg piroxicam alone (Feldene®) in mandibular third molar surgery. Eighty patients scheduled for removal of the third molar were included in this randomized and double-blind study. They received (vo) Rheumazin or Feldene 30 min after tooth extraction and once daily for 4 consecutive days. Pain was determined by a visual analogue scale and by the need...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Piroxicam; Dexamethasone; Orphenadrine; Cyanocobalamin; Pain; Mandibular molar surgery.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000900012

Influence of dexamethasone and weight loss on the regulation of serum leptin levels in obese individuals
Provedor de dados: 56
Autores: Lerario,D.D.G.; Ferreira,S.R.G.; Miranda,W.L.; Chacra,A.R.
The adipocyte hormone leptin is thought to serve as a signal to the central nervous system reflecting the status of fat stores. Serum leptin levels and adipocyte leptin messenger RNA levels are clearly increased in obesity. Nevertheless, the factors regulating leptin production are not fully understood. The aim of this study was to determine the effects of in vivo administration of the synthetic glucocorticoid dexamethasone and weight loss on serum leptin levels in two independent protocols. Twenty-five obese subjects were studied (18 women and 7 men, mean age 26.6 ± 6 years, BMI 31.1 ± 2.5 kg/m², %fat 40.3 ± 8.3) and compared at baseline to 22 healthy individuals. Serum levels of leptin, insulin, proinsulin and glucose were assessed at baseline and after...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Obesity; Leptin; Weight reduction; Dexamethasone.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000400007

Stimulatory effect of dexamethasone on angiotensin-converting enzyme in neonatal rat cardiac myocytes
Provedor de dados: 56
Autores: Barreto-Chaves,M.L.M.; Heimann,A.; Krieger,J.E.
Angiotensin-converting enzyme (ACE) plays a central role in cardiac remodeling associated with pathological conditions such as myocardial infarction. The existence of different cell types in the heart expressing components of the renin-angiotensin system makes it difficult to evaluate their relative role under physiological and pathological conditions. Since myocytes are the predominant cellular constituent of the heart by mass, in the present study we studied the effects of glucocorticoids on ACE activity using well-defined cultures of neonatal rat cardiac myocytes. Under steady-state conditions, ACE activity was present at very low levels, but after dexamethasone treatment ACE activity increased significantly (100 nmol/l after 24 h) in a time-dependent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dexamethasone; Cardiac myocytes; Angiotensin-converting enzyme.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000600007

Ethanol-induced hypothermia in rats is antagonized by dexamethasone
Provedor de dados: 56
The effect of dexamethasone on ethanol-induced hypothermia was investigated in 3.5-month old male Wistar rats (N = 10 animals per group). The animals were pretreated with dexamethasone (2.0 mg/kg, ip; volume of injection = 1 ml/kg) 15 min before ethanol administration (2.0, 3.0 and 4.0 g/kg, ip; 20% w/v) and the colon temperature was monitored with a digital thermometer 30, 60 and 90 min after ethanol administration. Ethanol treatment produced dose-dependent hypothermia throughout the experiment (-1.84 ± 0.10, -2.79 ± 0.09 and -3.79 ± 0.15oC for 2.0, 3.0 and 4.0 g/kg ethanol, respectively, 30 min after ethanol) but only the effects of 2.0 and 3.0 g/kg ethanol were significantly antagonized (-0.57 ± 0.09 and -1.25 ± 0.10, respectively, 30 min after ethanol)...
Palavras-chave: Ethanol; Dexamethasone; Hypothermia; Glucocorticoids; Rats.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997000100011

Role of endogenous glucocorticoids in hyperalgesia and edema in old arthritic rats
Provedor de dados: 56
Autores: Yokoro,C.M.; Tatsuo,M.A.K.F.; Pereira,L.S.M.; Alves,D.L.F.; Francischi,J.N.
We compared the intensity and frequency of arthritis in old (8-12 months, N = 12) and juvenile (2 months, N = 10) rats and determined the role played by adrenal glands in this disorder. Arthritis was induced by subcutaneous injection of Mycobacterium butyricum at the base of the tail of female Holtzman rats at day zero. Paw edema and hyperalgesia were monitored from day zero to day 21 after induction as signs of arthritis development. Some (N = 11) old animals were adrenalectomized bilaterally and treated with dexamethasone or celecoxib immediately following surgery. All bilaterally adrenalectomized old animals became susceptible to arthritis and the onset of disease was shortened from the 10th to the 5th day. Hyperalgesia and paw edema responses were less...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hyperalgesia; Edema; Adjuvant arthritis; Adrenalectomy; Dexamethasone; Old rats.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000100011

Effects of exercise and metformin on the prevention of glucose intolerance: a comparative study
Provedor de dados: 56
Autores: Molena-Fernandes,C.; Bersani-Amado,C. A.; Ferraro,Z. M.; Hintze,L. J.; Nardo Jr.,N.; Cuman,R. K. N.
We aimed to evaluate the effects of aerobic exercise training (4 days) and metformin exposure on acute glucose intolerance after dexamethasone treatment in rats. Forty-two adult male Wistar rats (8 weeks old) were divided randomly into four groups: sedentary control (SCT), sedentary dexamethasone-treated (SDX), training dexamethasone-treated (DPE), and dexamethasone and metformin treated group (DMT). Glucose tolerance tests and in situ liver perfusion were undertaken on fasting rats to obtain glucose profiles. The DPE group displayed a significant decrease in glucose values compared with the SDX group. Average glucose levels in the DPE group did not differ from those of the DMT group, so we suggest that exercise training corrects dexamethasone-induced...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Exercise; Glucose intolerance; Dexamethasone; Wistar rats; Diabetes mellitus; Prevention and control.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015001201101

The hepatic ectonucleotide pyrophosphatase/phosphodiesterase 1 gene mRNA abundance is reduced by insulin and induced by dexamethasone
Provedor de dados: 56
Autores: Ma,Huiwen; Wang,Ping; Jin,Dan; Jia,Ting; Mao,Hong; Zhang,Jiandi; Zhao,Shi.
Hormones regulate hepatic gene expressions to maintain metabolic homeostasis. Ectonucleotide pyrophosphatase/phosphodiesterase 1 has been thought to interfere with insulin signaling. To determine its potential role in the regulation of metabolism, we analyzed its gene (Enpp1) expression in the liver of rats experiencing fasting and refeeding cycles, and in primary rat hepatocytes and human hepatoma HepG2 cells treated with insulin and dexamethasone using northern blot and real-time PCR techniques. Hepatic Enpp1 expression was induced by fasting and reduced by refeeding in the rat liver. In primary rat hepatocytes and HepG2 hepatoma cells, insulin reduced Enpp1 mRNA abundance, whereas dexamethasone induced it. Dexamethasone disrupted the insulin-reduced...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ectonucleotide pyrophosphatase/phosphodiesterase 1; Insulin; Dexamethasone; Hepatocytes; Regulation of gene expression.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000400609

Pharmacological and histopathological study of cyclophosphamide-induced hemorrhagic cystitis - comparison of the effects of dexamethasone and Mesna
Provedor de dados: 56
Autores: 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

Induced maturation of hepatic progenitor cellsin vitro
Provedor de dados: 56
Autores: Bi,Y.; He,Y.; Huang,J.Y.; Xu,L.; Tang,N.; He,T.C.; Feng,T.
Hepatic progenitor cells (HPCs) are a potential cell source for liver cell transplantation but do not function like mature liver cells. We sought an effective and reliable method to induce HPC maturation. An immortalized HP14.5 albumin promoter-driven Gaussian luciferase (ALB-GLuc) cell line was established from HPCs isolated from fetal mouse liver of post coitus day 14.5 mice to investigate the effect of induction factors on ALB promoter. HP14.5 parental cells were cultured in DMEM with different combinations of 2% horse serum (HS), 0.1 µM dexamethasone (DEX), 10 ng/mL hepatic growth factor (HGF), and/or 20 ng/mL fibroblast growth factor 4 (FGF4). Trypan blue and crystal violet staining were used to assess cell proliferation with different induction...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hepatic progenitor cells; Induction; Maturation; Dexamethasone; Hepatic growth factor; Fibroblast growth factor 4.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000700559

Simultaneous RP-HPLC determination of sparfloxacin and dexamethasone in pharmaceutical formulations
Provedor de dados: 60
Autores: Razzaq,Syed Naeem; Ashfaq,Muhammad; Mariam,Irfana; Khan,Islam Ullah; Razzaq,Syed Saleem.
The present study describes the development and subsequent validation of simple and accurate stability indicating RP-HPLC method for the determination of sparfloxacin and dexamethasone in pharmaceutical formulations in the presence of their stress-induced degradation products. Both the drugs and their stress-induced degradation products were separated within 10 minutes using C8 column and mixture of methanol and 0.02 M phosphate buffer pH 3.0 (60:40 v/v, respectively) as mobile phase at 270 nm using diode array detector. Regression analysis showed linearity in the range of 15-105 µg/mL for sparfloxacin and 5-35 µg/mL for dexamethasone. All the analytes were adequately resolved with acceptable tailing. Peak purity of the two drugs was also greater than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: RP-HPLC; Sparfloxacin; Dexamethasone; Degradation products; Stability studies.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502013000200012

Stability indicating RP-HPLC method for simultaneous determination of gatifloxacin and dexamethasone in binary combination
Provedor de dados: 60
Autores: Razzaq,Syed Naeem; Ashfaq,Muhammad; Khan,Islam Ullah; Mariam,Irfana; Razzaq,Syed Saleem; Mustafa,Ghulam; Zubair,Muhammad.
Abstract In this study, conditions were optimized for development of a simple RP-HPLC method for simultaneous analysis of gatifloxacin and dexamethasone in different matrices like pharmaceuticals, human serum and urine. Good separation of gatifloxacin and dexamethasone from the induced degradation products was accomplished using C8 as stationary phase; 0.02 M phosphate buffer (pH 3.0) and methanol (42:58 v/v) as mobile phase. The concentration was measured with DAD at 270 nm. Linearity was observed in the range of 0.000040-0.000280 mol/L for gatifloxacin (r2≥0.999) and 0.000013-0.000091 mol/L for dexamethasone (r2≥0.999). Both the analyte peaks were completely separated from the peaks of induced degradation products as indicated by the peak purity index...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gatifloxacin; Dexamethasone; High performance liquid chromatography; Validation; Plasma; Degradation products.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502017000100607

Effect of an intravitreal dexamethasone device on ocular inflammation after phacoemulsification in dogs
Provedor de dados: 65
Autores: Lima,Tiago Barbalho; Padua,Ivan Martinez; Kobashigawa,Karina Kamachi; Aldrovani,Marcela; Chacaltana,Flor Diana Yocoay Claros; Santo,Paloma do Espírito; Vieira,Lorena Carla; Barros Sobrinho,Alexandre Augusto Franchi; Cunha Junior,Armando Silva; Laus,José Luiz.
ABSTRACT: This study examined the efficacy of an intravitreal dexamethasone-loaded device for the control of postoperative ocular inflammation in dogs following phacoemulsification. Twenty dogs with bilateral mature senile cataracts were prepared for surgery using routine protocols. A biodegradable poly (lactic-co-glycolic acid) copolymer device was inserted through the pars plana into the vitreous chamber immediately before phacoemulsification (device group [DG], n=20). Following surgery, a conventional group (CG) received local and systemic steroids, mydriatics, and antibiotic therapy. The same treatment protocol was adopted in DG, except for steroids. All eyes were examined before surgery and at various times after phacoemulsification. Ultrasonography...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dog; Cataract surgery; Inflammation; PLGA; Dexamethasone.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001202216