期刊
PFLUGERS ARCHIV-EUROPEAN JOURNAL OF PHYSIOLOGY
卷 466, 期 4, 页码 701-706出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00424-014-1452-z
关键词
T-type channels; Calcium; Low-voltage-activated; Hyperalgesia; Allodynia; Diabetes; Glycosylation
类别
资金
- American Diabetes Association National Award for Basic Research [7-09-BS-190]
- Dr. Harold Carron Endowment fund
- Department of Anesthesiology at the University of Virginia, Charlottesville, VA, USA
Pain-sensing sensory neurons (nociceptors) of the dorsal root ganglion (DRG) can become sensitized (hyperexcitable) in response to pathological conditions such as diabetes, which in turn may lead to the development of painful peripheral diabetic neuropathy (PDN). Because of insufficient knowledge about the mechanisms for this hypersensitization, current treatment for painful PDN has been limited to somewhat nonspecific systemic drugs having significant side effects or potential for abuse. Recent studies have established that the Ca(V)3.2 isoform of T-channels makes a previously unrecognized contribution to sensitization of pain responses by enhancing excitability of nociceptors in animal models of type 1 and type 2 PDN. Furthermore, it has been reported that the glycosylation inhibitor neuraminidase can inhibit the native and recombinant Ca(V)3.2 T-currents in vitro and completely reverse mechanical and thermal hyperalgesia in diabetic animals with PDN in vivo. Understanding details of posttranslational regulation of nociceptive channel activity via glycosylation may facilitate development of novel therapies for treatment of painful PDN. Pharmacological targeting the specific pathogenic mechanism rather than the channel per se may cause fewer side effects and reduce the potential for drug abuse in patients with diabetes.
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