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  • Title: Sensory purinergic receptor P2X3 is elevated in burning mouth syndrome.
    Author: Beneng K, Yilmaz Z, Yiangou Y, McParland H, Anand P, Renton T.
    Journal: Int J Oral Maxillofac Surg; 2010 Aug; 39(8):815-9. PubMed ID: 20418063.
    Abstract:
    Recent studies show that P2X(3) may play a role in neuropathic pain, including orofacial pain. Burning mouth syndrome (BMS) is a chronic neuropathic pain condition affecting 0.6-12% of post-menopausal women in the Western world. This study evaluates, for the first time, P2X(3) immunoreactivity levels in lingual mucosa in BMS patients. Patients diagnosed with BMS (n=9) in accordance with International Association for the Study of Pain criteria and patients attending for wisdom tooth removal (n=10, controls), were involved in this study. A pain history and score was recorded on a visual analogue scale (VAS) prior to obtaining a lingual biopsy. Immunohistochemistry and image analysis were used to quantify submucosal nerve fibres expressing P2X(3) and the structural marker neurofilaments. P2X(3) positive fibres were significantly increased in BMS compared with controls (p=0.024). In contrast, neurofilament-staining fibres were reduced in BMS, and when expressed as a ratio of the neurofilament percentage area, there was a trend for an increase of P2X(3) positive fibres in the BMS group. Increased P2X(3) immunoreactivity in the trigeminal sensory system may play a role in the symptoms observed in BMS. P2X(3) may therefore be a therapeutic target for treating BMS and trigeminal neuropathic pain.
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