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An electronic pressure-meter nociception paw test for mice BJMBR
Cunha,T.M.; Verri Jr.,W.A.; Vivancos,G.G.; Moreira,I.F.; Reis,S.; Parada,C.A.; Cunha,F.Q.; Ferreira,S.H..
The aim of the present investigation was to describe and validate an electronic mechanical test for quantification of the intensity of inflammatory nociception in mice. The electronic pressure-meter test consists of inducing the animal hindpaw flexion reflex by poking the plantar region with a polypropylene pipette tip adapted to a hand-held force transducer. This method was compared to the classical von Frey filaments test in which pressure intensity is automatically recorded after the nociceptive hindpaw flexion reflex. The electronic pressure-meter and the von Frey filaments were used to detect time versus treatment interactions of carrageenin-induced hypernociception. In two separate experiments, the electronic pressure-meter was more sensitive than...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hyperalgesia; Nociception; Indomethacin; Dipyrone; Von Frey filaments.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000300018
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An electronic pressure-meter nociception paw test for rats BJMBR
Vivancos,G.G.; Verri Jr.,W.A.; Cunha,T.M.; Schivo,I.R.S.; Parada,C.A.; Cunha,F.Q.; Ferreira,S.H..
The objective of the present investigation was to compare the sensitivity of an electronic nociceptive mechanical paw test with classical mechanical tests to quantify the intensity variation of inflammatory nociception. The electronic pressure-meter test consists of inducing the hindpaw flexion reflex by poking the plantar region with a polypropylene pipette tip adapted to a hand-held force transducer. This method was compared with the classical von Frey filaments test and with the rat paw constant pressure test, a modification of the Randall and Selitto test developed by our group. When comparing the three methods, the electronic pressure-meter and the rat paw constant pressure test, but not the von Frey filaments test, detected time vs treatment...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hyperalgesia; Nociception; Dipyrone; Indomethacin; Von Frey filaments; Constant pressure test.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000300017
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An interleukin-33/ST2 signaling deficiency reduces overt pain-like behaviors in mice BJMBR
Magro,D.A.C.; Hohmann,M.S.N.; Mizokami,S.S.; Cunha,T.M.; Alves-Filho,J.C.; Casagrande,R.; Ferreira,S.H.; Liew,F.Y.; Cunha,F.Q.; Verri Jr,W.A..
Interleukin (IL)-33, the most recent member of the IL family of cytokines, signals through the ST2 receptor. IL-33/ST2 signaling mediates antigen challenge-induced mechanical hyperalgesia in the joints and cutaneous tissues of immunized mice. The present study asked whether IL-33/ST2 signaling is relevant to overt pain-like behaviors in mice. Acetic acid and phenyl-p-benzoquinone induced significant writhing responses in wild-type (WT) mice; this overt nociceptive behavior was reduced in ST2-deficient mice. In an antigen-challenge model, ST2-deficient immunized mice had reduced induced flinch and licking overt pain-like behaviors. In the formalin test, ST2-deficient mice also presented reduced flinch and licking responses, compared with WT mice. Naive WT...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Interleukin-33; ST2; Pain; Nociception; Inflammation.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000700601
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Chronic intrathecal cannulation enhances nociceptive responses in rats BJMBR
Almeida,F.R.C.; Schivo,I.R.S.; Lorenzetti,B.B.; Ferreira,S.H..
The influence of a chronically implanted spinal cannula on the nociceptive response induced by mechanical, chemical or thermal stimuli was evaluated. The hyperalgesia in response to mechanical stimulation induced by carrageenin or prostaglandin E2 (PGE2) was significantly increased in cannulated (Cn) rats, compared with naive (Nv) or sham-operated (Sh) rats. Only Cn animals presented an enhanced nociceptive response in the first phase of the formalin test when low doses were used (0.3 and 1%). The withdrawal latency to thermal stimulation of a paw inflamed by carrageenin was significantly reduced in Cn rats but not in Nv or Sh rats. In contrast to Nv and Sh rats, injection in Cn animals of a standard non-steroid anti-inflammatory drug, indomethacin, either...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hyperalgesia; Spinal sensitization; Intrathecal cannulation; Nociceptive response; Inflammation.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000800011
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Editorial BJMBR
Teixeira,M.M.; Cunha,F.Q.; Ferreira,S.H..
Tipo: Info:eu-repo/semantics/other
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000500001
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Glutathione and the redox control system trypanothione/trypanothione reductase are involved in the protection of Leishmania spp. against nitrosothiol-induced cytotoxicity BJMBR
Romão,P.R.T.; Tovar,J.; Fonseca,S.G.; Moraes,R.H.; Cruz,A.K.; Hothersall,J.S.; Noronha-Dutra,A.A.; Ferreira,S.H.; Cunha,F.Q..
Glutathione is the major intracellular antioxidant thiol protecting mammalian cells against oxidative stress induced by oxygen- and nitrogen-derived reactive species. In trypanosomes and leishmanias, trypanothione plays a central role in parasite protection against mammalian host defence systems by recycling trypanothione disulphide by the enzyme trypanothione reductase. Although Kinetoplastida parasites lack glutathione reductase, they maintain significant levels of glutathione. The aim of this study was to use Leishmania donovani trypanothione reductase gene mutant clones and different Leishmania species to examine the role of these two individual thiol systems in the protection mechanism against S-nitroso-N-acetyl-D,L-penicillamine (SNAP), a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Leishmania; Glutathione; Trypanothione; Trypanothione reductase; Nitric oxide; Free radicals.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000300006
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Indomethacin attenuates mechanical allodynia during the organization but not the maintenance of the peripheral neuropathic pain induced by nervus ischiadicus chronic constriction injury BJMBR
Medeiros,P.; dos Santos,I.R.; Medeiros,A.C.; da Silva,J.A.; Ferreira,S.H.; de Freitas,R.L.; Coimbra,N.C..
The neurochemical mechanisms underlying neuropathic pain (NP) are related to peripheral and central sensitization caused by the release of inflammatory mediators in the peripheral damaged tissue and ectopic discharges from the injured nerve, leading to a hyperexcitable state of spinal dorsal horn neurons. The aim of this work was to clarify the role played by cyclooxygenase (COX) in the lesioned peripheral nerve in the development and maintenance of NP by evaluating at which moment the non-steroidal anti-inflammatory drug indomethacin, a non-selective COX inhibitor, attenuated mechanical allodynia after placing one loose ligature around the nervus ischiadicus, an adaptation of Bennett and Xie's model in rodents. NP was induced in male Wistar rats by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Non-steroidal anti-inflammatory drugs; Indomethacin; Chronic constriction injury of the nervus ischiadicus; Neuropathic pain; Mechanical allodynia; Von Frey test.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000500606
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Streptozotocin-induced mechanical hypernociception is not dependent on hyperglycemia BJMBR
Cunha,J.M.; Funez,M.I.; Cunha,F.Q.; Parada,C.A.; Ferreira,S.H..
Since streptozotocin (STZ)-induced diabetes is a widely used model of painful diabetic neuropathy, the aim of the present study was to design a rational protocol to investigate whether the development of mechanical hypernociception induced by STZ depends exclusively on hyperglycemia. Male Wistar rats (180-200 g; N = 6-7 per group) received a single intravenous injection of STZ at three different doses (10, 20, or 40 mg/kg). Only the higher dose (40 mg/kg) induced a significant increase in blood glucose levels, glucose tolerance and deficiency in weight gain. However, all STZ-treated rats (hyperglycemic or not) developed persistent (for at least 20 days) and indistinguishable bilateral mechanical hypernociception that was not prevented by daily insulin...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Streptozotocin; Mechanical hyperalgesia; Hyperglycemia; Insulin and glucose tolerance test.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000200008
Registros recuperados: 8
Primeira ... 1 ... Última
 

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