Transient receptor potential ion channels V4 and A1 contribute to pancreatitis pain in mice

被引:64
作者
Ceppa, Eugene [1 ]
Cattaruzza, Fiore [1 ]
Lyo, Victoria [1 ]
Amadesi, Silvia [1 ]
Pelayo, Juan-Carlos [1 ]
Poole, Daniel P. [1 ]
Vaksman, Natalya [1 ]
Liedtke, Wolfgang [3 ]
Cohen, David M. [4 ]
Grady, Eileen F. [1 ]
Bunnett, Nigel W. [1 ,2 ]
Kirkwood, Kimberly S. [1 ]
机构
[1] Univ Calif San Francisco, Dept Surg, San Francisco, CA 94143 USA
[2] Univ Calif San Francisco, Dept Physiol, San Francisco, CA 94143 USA
[3] Duke Univ Med Ctr, Dept Med & Neurobiol, Durham, NC USA
[4] Portland VA Med Ctr, Portland, OR USA
来源
AMERICAN JOURNAL OF PHYSIOLOGY-GASTROINTESTINAL AND LIVER PHYSIOLOGY | 2010年 / 299卷 / 03期
关键词
neurogenic inflammation; TRP channels; INDUCED NEUROGENIC INFLAMMATION; GENE-RELATED PEPTIDE; CAPSAICIN RECEPTOR; SENSORY NEURONS; ACTIVATED RECEPTOR-2; TRPV4; CHANNELS; RAT PANCREAS; MOUSE MODEL; TRPA1; HYPERALGESIA;
D O I
10.1152/ajpgi.00433.2009
中图分类号
R57 [消化系及腹部疾病];
学科分类号
摘要
Ceppa E, Cattaruzza F, Lyo V, Amadesi S, Pelayo J, Poole DP, Vaksman N, Liedtke W, Cohen DM, Grady EF, Bunnett NW, Kirkwood KS. Transient receptor potential ion channels V4 and A1 contribute to pancreatitis pain in mice. Am J Physiol Gastrointest Liver Physiol 299: G556-G571, 2010. First published June 10, 2010; doi: 10.1152/ajpgi.00433.2009.-The mechanisms of pancreatic pain, a cardinal symptom of pancreatitis, are unknown. Proinflammatory agents that activate transient receptor potential (TRP) channels in nociceptive neurons can cause neurogenic inflammation and pain. We report a major role for TRPV4, which detects osmotic pressure and arachidonic acid metabolites, and TRPA1, which responds to 4-hydroxynonenal and cyclopentenone prostaglandins, in pancreatic inflammation and pain in mice. Immunoreactive TRPV4 and TRPA1 were detected in pancreatic nerve fibers and in dorsal root ganglia neurons innervating the pancreas, which were identified by retrograde tracing. Agonists of TRPV4 and TRPA1 increased intracellular Ca2+ concentration ([Ca2+](i)) in these neurons in culture, and neurons also responded to the TRPV1 agonist capsaicin and are thus nociceptors. Intraductal injection of TRPV4 and TRPA1 agonists increased c-Fos expression in spinal neurons, indicative of nociceptor activation, and intraductal TRPA1 agonists also caused pancreatic inflammation. The effects of TRPV4 and TRPA1 agonists on [Ca2+](i), pain and inflammation were markedly diminished or abolished in trpv4 and trpa1 knockout mice. The secretagogue cerulein induced pancreatitis, c-Fos expression in spinal neurons, and pain behavior in wild-type mice. Deletion of trpv4 or trpa1 suppressed c-Fos expression and pain behavior, and deletion of trpa1 attenuated pancreatitis. Thus TRPV4 and TRPA1 contribute to pancreatic pain, and TRPA1 also mediates pancreatic inflammation. Our results provide new information about the contributions of TRPV4 and TRPA1 to inflammatory pain and suggest that channel antagonists are an effective therapy for pancreatitis, when multiple proinflammatory agents are generated that can activate and sensitize these channels.
引用
收藏
页码:G556 / G571
页数:16
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