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Titolo:
Sciatic inflammatory neuritis < SIN >: Behavioral allodynia is paralleled by peri-sciatic proinflammatory cytokine and superoxide production
Autore:
Gazda, LS; Milligan, ED; Hansen, MK; Twining, CM; Poulos, NM; Chacur, M; OConnor, KA; Armstrong, C; Maier, SF; Watkins, LR; Myers, RR;
Indirizzi:
Univ Colorado, Dept Psychol, Boulder, CO 80309 USA Univ Colorado Boulder CO USA 80309 o, Dept Psychol, Boulder, CO 80309 USA Univ Colorado, Ctr Neurosci, Boulder, CO 80309 USA Univ Colorado Boulder CO USA 80309 o, Ctr Neurosci, Boulder, CO 80309 USA Butantan Inst, Lab Pathophysiol, Sao Paulo, Brazil Butantan Inst Sao Paulo Brazil nst, Lab Pathophysiol, Sao Paulo, Brazil Univ Calif San Diego, Dept Anesthesiol, La Jolla, CA 92093 USA Univ Calif San Diego La Jolla CA USA 92093 hesiol, La Jolla, CA 92093 USA
Titolo Testata:
JOURNAL OF THE PERIPHERAL NERVOUS SYSTEM
fascicolo: 3, volume: 6, anno: 2001,
pagine: 111 - 129
SICI:
1085-9489(200109)6:3<111:SIN<S>>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
TUMOR-NECROSIS-FACTOR; CHRONIC CONSTRICTION INJURY; PAIN ASSOCIATED BEHAVIOR; PERIPHERAL-NERVE INJURY; NITRIC-OXIDE SYNTHASE; THERMAL HYPERALGESIA; NEUROPATHIC PAIN; OPSONIZED ZYMOSAN; POLYMORPHONUCLEAR LEUKOCYTE; FACTOR-ALPHA;
Keywords:
neuropathy; zymosan; interleukin-1 beta; tumor necrosis factor-alpha; interleukin-6; chemiluminescence; allodynia;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
108
Recensione:
Indirizzi per estratti:
Indirizzo: Watkins, LR Univ Colorado, Dept Psychol, Campus Box 345, Boulder, CO 80309USA Univ Colorado Campus Box 345 Boulder CO USA 80309 CO 80309 USA
Citazione:
L.S. Gazda et al., "Sciatic inflammatory neuritis < SIN >: Behavioral allodynia is paralleled by peri-sciatic proinflammatory cytokine and superoxide production", J PERIPH N, 6(3), 2001, pp. 111-129

Abstract

We have recently developed a model of sciatic inflammatory neuritis (SIN) to assess how immune activation near peripheral nerves influences somatosensory processing. Administration of zymosan (yeast cell walls) around a single sciatic nerve produces dose-dependent low-threshold mechanical allodyniawithout thermal hyperalgesia. Low (4 mug) doses produce both territorial and extraterritorial allodynia restricted to the injected hindleg. In contrast, higher (40 mug) doses produce territorial and extraterritorial allodynias of both hindlegs, an effect not accounted for by systemic spread of the zymosan, The aim of these experiments was to determine whether these behavioral allodynias were correlated with immunological and/or anatomical changes in or around the sciatic nerve, These experiments reveal that zymosan-induced bilateral allodynia was associated with the following: (a) increased release of both interleukin-1 beta and tumor necrosis factor-alpha from peri-sciatic immune cells; (b) increased release of reactive oxygen species from peri-sciatic immune cells; (c) no change in circulating levels of proinflammatory cytokine; (d) no apparent zymosan-induced influx of immune cells into the sciatic nerve from the endoneurial blood vessels; (e) mild edema ofthe sciatic, which was predominantly restricted to superficial regions closest to the peri-sciatic immune cells; and (f) no anatomic evidence of changes in either the ipsilateral saphenous nerve or contralateral sciatic nerve that could account for the appearance of extraterritorial or contralateral ("mirror") allodynia, respectively. No reliable differences were found when the low-dose zymosan was compared with vehicle controls. Taken together,these data suggest that substances released by peri-sciatic immune cells may induce changes in the sciatic nerve, leading to the appearance of bilateral allodynia.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 01:34:52