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[Abstract Title]. - Society for Neuroscience

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cells in some vagus nerves. TRPA1 channels response ingredients of multiple spices <strong>for</strong> example<br />

mustard, garlic and onion. These spices used as seasoning <strong>for</strong> a long time and recently their<br />

beneficial effects <strong>for</strong> the health by decreasing blood pressure, cholesterol level and body weight<br />

have been frequently reported. Together TRPA1 channel activity in the vagus nerve may relate<br />

with the spices effect on autonomic response in the body. However the cellular mechanism is not<br />

known yet. In this study we have test TRPA1 and TRPV1 agonists effects on nodose ganglion<br />

neurons using patch clamp method. NG neurons taken from 1 to 7 day-old rats and treated with<br />

protease be<strong>for</strong>e dispersed with Pasture pipette.<br />

TRPA1 channel agonist allyl isothiocyanate (100 κM, MO) induced inward current in acutely<br />

dispersed nodose ganglion neurons (66.4 ± 20.49 pA, n = 8) and the response have blocked by<br />

TRPA1 channel antagonist ruthenium red (100 κM). TRPA1 channel agonist allyl isothiocyanate<br />

(MO) and TRPV1 channel agonist capsaicin (CAP, 200 nm) induced inward currents from<br />

acutely isolated NG neurons by the reversible manner. TRPA1 receptor inhibitor ruthenium red<br />

(0.2 mM) blocked MO induced currents. 23% of the NG cells respond to of MO and capsaicin<br />

(CAP, 200 nM) but 43% of the NG cells respond neither of them. 34% of the NG neurons<br />

respond to only one of the MO or CAP.These TRPA receptors mediated neuronal activities<br />

change in vagus nerve and its axon terminals may have been related with autonomic reflex<br />

alteration after spice ingestion.<br />

Disclosures: S. Bang, None; Y. Jin , R01-2008-000-10891-0 (Jin, Y-H), B. Research Grant<br />

(principal investigator, collaborator or consultant and pending grants as well as grants already<br />

received); B. Sun, None.<br />

Poster<br />

265. Nociceptors II<br />

Time: Sunday, November 16, 2008, 1:00 pm - 5:00 pm<br />

Program#/Poster#: 265.6/EE7<br />

Topic: D.08.b. Nociceptors<br />

Support: Supported in part by NIH R01 DA19585 and T32 DE14318.<br />

<strong>Title</strong>: ACEA modulation of TRPA1<br />

Authors: *N. B. RUPAREL 1 , A. M. PATWARDHAN 2 , A. N. AKOPIAN 2 , K. M.<br />

HARGREAVES 2 ;<br />

1 CELL STRUCTURAL BIOL, UTHSCSA, San Antonio, TX; 2 Endodontics, Univ. of Hlth. Sci.<br />

Ctr. at San Antonio, San Antonio, TX

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