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1.
Braz. j. med. biol. res ; 45(6): 531-536, June 2012. ilus
Article in English | LILACS | ID: lil-622778

ABSTRACT

Implantation of Walker 256 tumor decreases acute systemic inflammation in rats. Inflammatory hyperalgesia is one of the most important events of acute inflammation. The L-arginine/NO/cGMP/K+ATP pathway has been proposed as the mechanism of peripheral antinociception mediated by several drugs and physical exercise. The objective of this study was to investigate a possible involvement of the NO/cGMP/K+ATP pathway in antinociception induced in Walker 256 tumor-bearing male Wistar rats (180-220 g). The groups consisted of 5-6 animals. Mechanical inflammatory hypernociception was evaluated using an electronic version of the von Frey test. Walker tumor (4th and 7th day post-implantation) reduced prostaglandin E2- (PGE2, 400 ng/paw; 50 µL; intraplantar injection) and carrageenan-induced hypernociception (500 µg/paw; 100 µL; intraplantar injection). Walker tumor-induced analgesia was reversed (99.3% for carrageenan and 77.2% for PGE2) by a selective inhibitor of nitric oxide synthase (L-NAME; 90 mg/kg, ip) and L-arginine (200 mg/kg, ip), which prevented (80% for carrageenan and 65% for PGE2) the effect of L-NAME. Treatment with the soluble guanylyl cyclase inhibitor ODQ (100% for carrageenan and 95% for PGE2; 8 µg/paw) and the ATP-sensitive K+ channel (KATP) blocker glibenclamide (87.5% for carrageenan and 100% for PGE2; 160 µg/paw) reversed the antinociceptive effect of tumor bearing in a statistically significant manner (P < 0.05). The present study confirmed an intrinsic peripheral antinociceptive effect of Walker tumor bearing in rats. This antinociceptive effect seemed to be mediated by activation of the NO/cGMP pathway followed by the opening of KATP channels.


Subject(s)
Animals , Male , Rats , Analgesics/metabolism , /metabolism , Cyclic GMP/metabolism , KATP Channels/metabolism , Nitric Oxide/metabolism , Nociception/drug effects , Pain Threshold/drug effects , Arginine/metabolism , Carrageenan/antagonists & inhibitors , Carrageenan/pharmacology , Dinoprostone/pharmacology , Hyperalgesia/drug therapy , Hyperalgesia/etiology , Oxadiazoles/pharmacology , Pain Measurement , Pain Threshold/physiology , Quinoxalines/pharmacology , Rats, Wistar , Signal Transduction
2.
J. bras. nefrol ; 6(3): 74-6, 1984.
Article in Portuguese | LILACS | ID: lil-22961

ABSTRACT

Os autores mostram sua experiencia em relacao ao uso de sonda maleavel de polietileno em substituicao as proteses rigidas, como manutencao do pertuito para dialise peritoneal intermitente. No perido de fevereiro/78 a dezembro/83 foram utilizadas no Servico de Nefrologia da Associacao Hospital Evangelico do Espirito Santo (AHEDES) 1.560 sondas de polietileno, calibre numero 10, como protese para a manutencao do pertuito para a dialise peritoneal, para um total de 127 pacientes (sendo 88 pacientes portadores de insuficiencia renal cronica terminal e 39 portadores de insuficiencia renal aguda prolongada), em substituicao a protese de Deane.Nesse periodo, nao foram observadas quaisquer complicacoes atribuiveis ao uso da protese de polietileno e suas vantagens nos levam a propor sua padronizacao em substituicao a proteses rigidas


Subject(s)
Humans , Catheterization , Peritoneal Dialysis , Prostheses and Implants , Polyethylenes
3.
J. bras. nefrol ; 6(1): 16-9, 1984.
Article in Portuguese | LILACS | ID: lil-21694

ABSTRACT

O presente trabalho reporta as observacoes dos autores acompanhando 79 pacientes uremicos que foram tratados no Servico de Nefrologia da Associacao Hospital Evangelico do Espirito Santo, num periodo de 5 anos, sendo estudadas suas caracteristicas (idade, sexo, cor, doenca renal primaria, etc.), seu curso e evolucao. Consideramos as intercorrencias clinicas e cirurgicas mais frequentes e encontramos uma sobrevida cumulativa de 69,6%. Verificaram uma excelente integracao entre dialise e transplante renal uma vez que foram transplantados 39,24% de todos os pacientes em dialise durante este periodo. A etiologia da insuficiencia renal cronica terminal no grupo de pacientes dos autores foi semelhante a de outros estudos; as causas de obito relacionadas a doencas cardiovasculares estiveram em primeiro lugar, responsaveis por 70,5% dos obitos seguindo as doencas infecciosas, com 17,64%, o que comparavel a outras revisoes


Subject(s)
Adolescent , Adult , Middle Aged , Humans , Male , Female , Dialysis , Renal Insufficiency, Chronic
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