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Pronociceptive response elicited by TRPA1 receptor activation in mice

Andrade, E.L ; Luiz, A.P ; Ferreira, J ; Calixto, J.B

Neuroscience, 2008-03, Vol.152 (2), p.511-520 [Periódico revisado por pares]

Oxford: Elsevier Inc

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Título:
Pronociceptive response elicited by TRPA1 receptor activation in mice
Autor: Andrade, E.L ; Luiz, A.P ; Ferreira, J ; Calixto, J.B
Assuntos: allyl isothiocyanate ; Analgesics - therapeutic use ; Anilides - administration & dosage ; Animals ; Behavior, Animal ; Biological and medical sciences ; capsaicin ; Capsaicin - administration & dosage ; Capsaicin - analogs & derivatives ; cinnamaldehyde ; Cinnamates - administration & dosage ; Dipeptides - therapeutic use ; Dose-Response Relationship, Drug ; Drug Interactions ; Fundamental and applied biological sciences. Psychology ; histamine ; Indoles - therapeutic use ; Isothiocyanates ; Male ; mast cells ; Mice ; Neurology ; Pain - chemically induced ; Pain - metabolism ; Pain - prevention & control ; Pain Measurement ; Ruthenium Red - therapeutic use ; Time Factors ; transient potential receptor ; Transient Receptor Potential Channels - agonists ; Transient Receptor Potential Channels - antagonists & inhibitors ; Transient Receptor Potential Channels - metabolism ; TRPA1 Cation Channel ; Vertebrates: nervous system and sense organs
É parte de: Neuroscience, 2008-03, Vol.152 (2), p.511-520
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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Descrição: Abstract Ankyrin-repeat transient receptor potential 1 (TRPA1) is a member of the transient receptor potential (TRP) channel family and it is found in sensory neurons. In the present study, we found that TRPA1 receptor activation with allyl isothiocyanate or cinnamaldehyde caused dose-dependent spontaneous nociception when injected into the mouse hind paw. Very similar results were obtained when stimulating transient receptor potential vanilloid 1 (TRPV1) receptors with capsaicin. Pretreatment with the TRP receptor antagonist Ruthenium Red (1 nmol/paw) inhibited capsaicin-(0.1 nmol/paw) and allyl isothiocyanate–(1 nmol/paw) induced nociceptive responses. However, the nonselective TRPV1 receptor antagonist capsazepine (1 nmol/paw) and the selective TRPV1 receptor antagonist SB 366791 (1 nmol/paw) only attenuated capsaicin-induced nociception. In contrast, the intrathecal treatment with TRPA1 antisense oligodeoxynucleotide (2.5 nmol/site) and the degeneration of the subset of primary afferent fibers sensitive to capsaicin significantly reduced allyl isothiocyanate–induced nociception. Consequently to TRPA1 antisense oligodeoxynucleotide treatment there was a marked decrease of the expression of TRPA1 receptor in both sciatic nervous and spinal cord segments. Moreover, capsaicin and allyl isothiocyanate–induced nociception were not significantly changed by chemical sympathectomy produced by guanethidine. The previous degranulation of mast cells by compound 48/80 and treatment with antagonist H1 receptor antagonist pyrilamine (400 μg/paw) both significantly inhibited the capsaicin- and allyl isothiocyanate–induced nociception. The selective NK1 receptor antagonist N2 -[(4 R )-4-hydroxy-1-(1-methyl-1 H -indol-3-yl) carbony-1- l -prolyl]- N -methyl- N -phenylmethyl-3-2-(2-naphtyl)- l -alaninamide (10 nmol/paw) reduced either capsaicin- or allyl isothiocyanate–induced nociception. Collectively, the present findings demonstrate that the TRPA1 agonist allyl isothiocyanate produces a consistent nociceptive response when injected into the mouse paw, an effect that seems to be mediated via activation of TRPA1 receptor and dependent on the capsaicin-sensitive fibers, release of histamine by mast cells and participation of tachykinins. Thus, the TRPA1 receptor has an apparently relevant role in nociceptive processes and the selective TRPA1 antagonist might possess a potential antinociceptive property.
Editor: Oxford: Elsevier Inc
Idioma: Inglês

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Pronociceptive response elicited by TRPA1 receptor activation in mice

Andrade, E.L ; Luiz, A.P ; Ferreira, J ; Calixto, J.B

Oxford: Elsevier Inc

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