12 results on '"Rola, Francisco Hélio"'
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2. Gastric Emptying and Gastrointestinal Transit of Liquid in Awake Rats Is Delayed After Acute Myocardial Infarction
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Camurça, Flávio Duarte, Queiroz, Dário Augusto Ferreira De, Leal, Paulo Roberto Lacerda, Rodrigues, Cleonísio Leite, Gondim, Francisco De Assis Aquino, Graça, José Ronaldo Vasconcelos Da, Rola, Francisco Hélio, Souza, Miguel Angelo Nobre E, and Santos, Armenio Aguiar Dos
- Published
- 2004
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3. Sildenafil, a Phosphodiesterase-5 Inhibitor, Delays Gastric Emptying and Gastrointestinal Transit of Liquid in Awake Rats
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de Rosalmeida, Mauro Cabral, Saraiva, Luciana Duarte Sobreira, da Graça, José Ronaldo Vasconcelos, Ivo, Bruno Barreto, da Nóbrega, Marcel Vieira, Gondim, Francisco de Assis Aquino, Rola, Francisco Hélio, and Santos, Armenio Aguiar dos
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- 2003
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4. Gastric Emptying and Gastrointestinal Transit of Liquid Throughout the First Month After Thoracic Spinal Cord Transection in Awake Rats
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Rodrigues, Cleonisio Leite, Gondim, Francisco de Assis Aquino, Leal, Paulo Roberto Lacerda, Camurça, Flávio Duarte, Freire, Caio César Furtado, Santos, Armenio Aguiar dos, and Rola, Francisco Hélio
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- 2001
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5. INHIBITORY EFFECT OF SILDENAFIL ON RAT DUODENAL CONTRACTILITY IN VITRO: PUTATIVE cGMP INVOLVEMENT
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Araújo, Paula Vasconcelos, Clemente, Cristiano Magalhães, da Graça, José Ronaldo Vasconcelos, Rola, Francisco Hélio, de Oliveira, Ricardo Brandt, dos Santos, Armênio Aguiar, and Magalhães, Pedro Jorge Caldas
- Published
- 2005
6. 1.8 cineole decreases gastric compliance in anesthetized rats
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Neves, José Ricardo Cunha, Lira, Gislano Heverton Soares de, Oliveira Neto, Rocino Marinho de, Graça, José Ronaldo Vasconcelos da, Vasconcelos, Paulo Roberto Leitão de, Souza, Miguel Ângelo Nobre e, Magalhães, Pedro Jorge Caldas, Rola, Francisco Hélio, and Santos, Armênio Aguiar dos
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Estômago ,Stomach ,Croton ,Gastrointestinal Motility ,Motilidade Gastrointestinal ,Rats ,Ratos - Abstract
PURPOSE: To study the effect of 1,8 cineoleee components of the essencial oil of Croton nepetaefolius - plant of North-East of Brasil, used in the popular medicine for riots of the gastrointestinal tract - on the motor behavior of the gut of Wistar rats. METHODS: Used 16 male animals under jejun of 24h weighing 300-350g. The effect of 1.8 cineoleee (1 or 3mg/Kg) on gastric compliance had been lead in anaesthetized rats. The variations of the gastric volume (GV), had been measured by plethysmography, while AP, HR and CVP had been monitored continuously by a digital system of data acquisition. RESULTS: Observe reduction of the GV, which was significant on 30, 40, 50 and 60min after treatment (2.0±0.1; 1.9±0.1; 1.8±0.1 and 1.7±0.1mL, versus 2.1±0.2mL). The AP presented significant fall after the administration of 1.8 cineoleee, remaining thus during 60min of monitorization (87.9±7.7; 87.6±7.1; 87.9±6.4; 87.8±5.7; 86.0±5.5 and 87.7±6.0mmHg, respectively versus 94.4±6.2 mmHg), as well as the HR (366.3±13.4; 361.7±11.5; 357.3±10.4; 353.0±10.4; 348.3±11.1 and 350.4±13.7bpm, respectively versus 395.2±11.1bpm). The CVP did not suffer significant variations after treatment. CONCLUSION: Observe the 1.8 cineoleee reduces the gastric compliance in anaesthetized rats besides presenting effect hipotensor and bradicardic; probably for direct action on the gastrointestinal and vascular smooth muscel and moduling the autonomic nervous system. OBJETIVO: Estudar o efeito do 1.8 cineol, componente do Cróton nepetaefolius (planta do Nordeste) comumente usada na medicina popular para distúrbios do trato gastrintestinal (TGI), sobre o comportamento motor do TGI de ratos Wistar anestesiados. MÉTODOS: Utilizamos 16 animais machos, pesando entre 300 a 350g. Os estudos de complacência gástrica foram conduzidos em animais sob jejum de 24h. As variações do volume gástrico (VG), foram medidas por pletismografia, enquanto a PA, FC e PVC foram monitoradas continuamente por um sistema digital de aquisição de dados. RESULTADOS: Observamos diminuição do VG, o qual foi significativo aos 30, 40, 50 e 60min após o tratamento com 1.8 cineol quando comparado ao perído basal (2,0±0,1; 1,9±0,1; 1,8±0,1 e 1,7±0,1mL, vs 2,1±0,2mL). A PA apresentou queda significativa após a administração de 1.8 cineol, mantendo-se assim durante os 60min de monitoração (87,9±7,7; 87,6±7,1; 87,9±6,4; 87,8±5,7; 86,0±5,5 e 87,7±6,0mmHg, respectivamente vs 94,4±6,2; mmHg), bem como a FC (366,3±13,4; 361,7±11,5; 357,3±10,4; 353,0±10,4; 348,3±11,1 e 350,4±13,7bpm respectivamente vs 395,2±11,1bpm). Já a PVC não sofreu variações significativas durante após o tratamento. CONCLUSÃO: O 1.8 cineol diminui a complacência gástrica em ratos anestesiados além de apresentar efeitos hipotensor e bradicárdico; provavelmente por ação direta sobre a musculatura lisa gastrintestinal e vascular e modulação do sistema nervoso autônomo.
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- 2007
7. 1.8 cineole decreases gastric compliance in anesthetized rats
- Author
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Neves, José Ricardo Cunha, primary, Lira, Gislano Heverton Soares de, additional, Oliveira Neto, Rocino Marinho de, additional, Graça, José Ronaldo Vasconcelos da, additional, Vasconcelos, Paulo Roberto Leitão de, additional, Souza, Miguel Ângelo Nobre e, additional, Magalhães, Pedro Jorge Caldas, additional, Rola, Francisco Hélio, additional, and Santos, Armênio Aguiar dos, additional
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- 2007
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8. Gastric emptying and gastrointestinal motility abnormalities after spinal cord injury
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de Assis Gondim, Francisco, primary, Louis, Saint, additional, Lopes, Augusto Celso, additional, Rodrigues, Cleonisio Leite, additional, Vasconcelos da Graca, José Ronaldo, additional, and Rola, Francisco Hélio, additional
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- 2002
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9. Inhibitory effect of sildenafil on rat duodenal contractilityIn vitro: Putative cGMP involvement.
- Author
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Araújo, Paula Vasconcelos, Clemente, Cristiano Magalhães, da Graça, José Ronaldo Vasconcelos, Rola, Francisco Hélio, de Oliveira, Ricardo Brandt, dos Santos, Armênio Aguiar, and Magalhães, Pedro Jorge Caldas
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SILDENAFIL ,DUODENUM ,LABORATORY rats ,SMOOTH muscle ,CYCLIC nucleotide phosphodiesterase inhibitors ,LABORATORY animals - Abstract
1. Sildenafil citrate (Viagra™; Pfizer, Sandwich, Kent, UK), a phosphodiesterase 5 inhibitor, rises cGMP levels in smooth muscle cells. It relaxes both vascular and visceral smooth muscle. In order to assess the intestinal effects of sildenafil, we decided to investigate its actions on rat duodenal motor activityin vitro.2. In isolated duodenal segments maintained in Tyrode's solution, sildenafil exhibited a concentration-dependent antispasmodic effect on acetylcholine (ACh)-induced phasic contractions, with an IC
50 value of 26.7 µmol/L (95% confidence interval (CI) 2.0–55.3 µmol/L).3. Sildenafil also relaxed the carbamylcholine (CCh)-induced sustained contraction with an IC50 of 16.2 µmol/L (95% CI 9.5–27.6 µmol/L). Sildenafil produced significant additional relaxation of 25.2 ± 8.1% of the CCh-induced contraction, beyond basal tone.4. Sildenafil reduced the amplitude of spontaneous duodenal contractions with an EC50 of 9.6 µmol/L (95% CI 5.7–16.2 µmol/L). This effect was significantly more potent than the effects of zaprinast and papaverine, which also reduced duodenal contractions with EC50 values of 91.6 µmol/L (95% CI 46.0–182.2 µmol/L) and 78.5 µmol/L (95% CI 37.1–166.3 µmol/L), respectively.5. In preparations treated previously with methylene blue (10 μmol/L) or 1H-[1,2,4]oxadiazolo(4,3-a)quinoxalin-1-one (ODQ; 10 µmol/L), the EC50 values for the sildenafil effect were significantly increased to 39.0 µmol/L (95% CI 23.9–63.4 µmol/L) and 43.8 µmol/L (95% CI 24.5–78.3 µmol/L), respectively. These values were significantly greater than those obtained with sildenafil alone.6. In conclusion, sildenafil has myorelaxant and antispasmodic effects on rat duodenal segmentsin vitro.The contractile inhibitory effect of sildenafil on rat isolated duodenum is probably due to intracellular cGMP accumulation as a result of its decreased degradation. [ABSTRACT FROM AUTHOR]- Published
- 2005
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10. Efeitos do óleo essencial do Eucalyptus tereticornis e dos constituintes 1,8-cineol, α-pineno e β-pineno na motilidade do músculo liso gastrintestinal de ratos
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Jucá, Davi Matthews and Rola, Francisco Hélio
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Eucalyptus ,Óleos Voláteis ,Músculo Liso - Abstract
The monoterpenes 1,8-cineole, α-pinen and β-pinene are constituents commonly found in several essential oils obtained from plants in Brazilian northeast such as “malva-santa” and “eucalipto” (Essential Oil of Eucalyptus tereticornis - EOET), which are used in folk medicine to treat respiratory and gastrointestinal dysfunctions. Myorelaxant actions are due to the presence of these constituents in their essential oils. The present work aimed to further study the pharmacological effects of these compounds, as well as the EOET, on smooth muscle gastrointestinal contractility and the prokinetic effect in rats. Wistar rats (200-250 g) were used, sacrificed by cervical dislocation. Strips were carefully obtained from gastric fundus, duodenum and ileum, and were maintained in normal Tyrode‟s solution. Isometric contractions were recorded through force transducers coupled to a computerized data acquisition system. Solutions containing 1,8-cineolo, α-pinene or β-pinene were prepared with Tween 80 (final concentration ≤ 0,2% v/v). Solely used, EOET, 1,8-cineole, α-pinene or β-pinene decreased duodenal basal tonus. In basal tone of gastric fundus isolated strips, EOET and 1,8-cineole had relaxant effect, while α-pinene and β-pinene had contractile effect. This contractile effect of α-pinene and β-pinene in isolated strips of gastric fundus is due to possible interference with IP3-dependent mechanism and independent of the muscarinic receptor activation and a central action in the activation of nicotinic receptors, in the same way, the duodenal smooth muscle relaxant effect is mediated by possible interference with the cellular mechanisms mediated by the formation of IP3. Moreover, as shown above, in the rat ileum, monoterpenes activate capacitative Ca2+ entry to intracellular milieu after Ca2+ stores depletion. The α-pinene and β-pinene also accelerated intestinal transit and reduced gastric compliance. Our data show that OEET has prokinetic properties in rats, which may be attributable to the contrasting effects induced by α-pinene and β-pinene, corroborating data presented previously (Jucá, 2007). O 1,8-cineol, o α-pineno e β-pineno são monoterpenos constituintes do óleo essencial de plantas encontradas no Nordeste do Brasil como a “malva-santa” e o “eucalipto” (Óleo Essencial do Eucalyptus tereticornis - OEET) que, na medicina popular, são usadas no tratamento de distúrbios intestinais e respiratórios. As ações miorrelaxantes desses óleos essenciais são atribuídas à presença desses monoterpenos. Nosso objetivo foi estudar mais detalhadamente os efeitos desses constituintes, assim como o do OEET, sobre a contratilidade do músculo liso gastrintestinal e sobre o efeito procinético em ratos. No presente estudo, foram usados ratos Wistar machos (180-250g) sacrificados por deslocamento cervical. Tiras de duodeno, íleo e fundo de estômago foram cortados e mantidos em solução de Tyrode normal. As contrações isométricas foram registradas através de transdutores de força conectados a sistema computadorizado. Soluções contendo o 1,8-cineol, o α-pineno ou β-pineno foram preparadas em Tween 80 (concentração final ≤ 0,2% v/v). Usados isoladamente, o OEET, o 1,8-cineol, o α-pineno e β-pineno diminuíram o tônus basal em tiras de duodeno. Em tônus basal de tiras isoladas de fundo gástrico, o OEET e o 1,8-cineol possuíram efeito miorrelaxante, enquanto o α-pineno e o β-pineno possuíram efeito contrátil. Esse efeito contrátil do α-pineno e do β-pineno em tiras isoladas de fundo gástrico é por possível interferência com o mecanismo dependente de IP3 e independe da ativação local do receptor muscarínico e de uma ação central na ativação de receptores nicotínicos, da mesma forma, o efeito miorrelaxante na musculatura lisa duodenal é mediado por possível interferência com os mecanismos celulares mediados pela formação de IP3. Além disso, como demonstrado anteriormente, em íleo de rato, esses monoterpenos provavelmente ativam as vias de entrada de Ca2+ para a célula em situações de depleção dos estoques intracelulares. Em estudos de retenção fracional de corante no trato gastrintestinal, o OEET, o 1,8-cineol, o α-pineno e o β-pineno promoveram a aceleração do esvaziamento gástrico. O α-pineno e β-pineno também aceleraram o trânsito intestinal e reduziram a complacência gástrica. Os nossos dados mostram que OEET possui propriedades pró-cinéticas, que podem ser atribuíveis aos efeitos contrastantes induzidos por α-pineno e β-pineno, corroborando com dados apresentados anteriormente (Jucá, 2007).
- Published
- 2012
11. Importance of Heart Rate Analysis in the differentiation of epileptic and non epileptic events
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Oliveira, Gisele Ramos de and Rola , Francisco Hélio
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Sistema Nervoso Central ,Frequência Cardíaca ,Epilepsia - Abstract
Dialeptic seizures are characterized by ictal loss of consciouness, that is independent of the EEG correlate. This classification of epileptic seizures is based only on ictal semiology and was proposed by Lüders et al in 1998. We studied 59 dialeptic events of 27 patients. The events were retrospectively analyzed and classified in: dialeptic complex partial seizures, dialeptic simple partial seizures and dialeptic non epileptic events. It is well known that cardiovascular regulation is a function of neuronal activity in the cerebral cortex, amygdala, and reticular formation in the medulla, and that selective activation of cardiac centers in theses areas is responsible for changes in the heart rate. Our study analyzed the heart rate changes 1 hour prior, during and 1 hour after each dialeptic event. It was shown that the heart rate of the basal period was similar in the complex partial seizures group and in the non epileptic group. The basal heart rate was increased in the simple partial seizures group (P
- Published
- 2006
12. Repeated cisplatin treatments inhibit gastrointestinal motility and induces baroreflex changes and mechanical hyperalgesia in rats.
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Viana-Cardoso KV, da Silva MT, Júnior RC, Peixoto Junior AA, Pinho LG, Santos AA, Ribeiro RA, Rola FH, and Gondim Fde A
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- Animals, Dose-Response Relationship, Drug, Gastric Emptying drug effects, Gastrointestinal Transit drug effects, Male, Rats, Rats, Wistar, Reaction Time drug effects, Antineoplastic Agents toxicity, Baroreflex drug effects, Cisplatin toxicity, Gastrointestinal Motility drug effects, Hyperalgesia chemically induced
- Abstract
Cisplatin is a chemotherapy agent known for its neurotoxicity. We evaluated the effect of cisplatin on the gastric emptying (GE), gastrointestinal (GI) transit of liquid, baroreflex function, thermal, and mechanical withdrawal latencies in rats. Cisplatin increased the GE of liquid with doses ≥ 2 mg.kg(-1) by 59.7-77.4%. This GE delay was not present two weeks after the treatment with five doses of cisplatin at 1 mg.kg(-1). Cisplatin also enhanced baroreflex gain possibly by increasing sympathetic activity. Our results demonstrated that cisplatin (2-10 mg.kg(-1)) causes autonomic neuropathy with GI and baroreflex changes and mechanical but not thermal hyperalgesia in rats.
- Published
- 2011
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