Abstract：
:The cannabinoid type 1 (CB1) receptor and the capsaicin receptor (TRPV1) exhibit co-expression and complex, but largely unknown, functional interactions in a sub-population of primary sensory neurons (PSN). We report that PSN co-expressing CB1 receptor and TRPV1 form two distinct sub-populations based on their pharmacological properties, which could be due to the distribution pattern of the two receptors. Pharmacologically, neurons respond either only to capsaicin (COR neurons) or to both capsaicin and the endogenous TRPV1 and CB1 receptor ligand anandamide (ACR neurons). Blocking or deleting the CB1 receptor only reduces both anandamide- and capsaicin-evoked responses in ACR neurons. Deleting the CB1 receptor also reduces the proportion of ACR neurons without any effect on the overall number of capsaicin-responding cells. Regarding the distribution pattern of the two receptors, neurons express CB1 and TRPV1 receptors either isolated in low densities or in close proximity with medium/high densities. We suggest that spatial distribution of the CB1 receptor and TRPV1 contributes to the complexity of their functional interaction.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Chen J,Varga A,Selvarajah S,Jenes A,Dienes B,Sousa-Valente J,Kulik A,Veress G,Brain SD,Baker D,Urban L,Mackie K,Nagy Idoi
10.1038/srep33307subject
Has Abstractpub_date
2016-09-22 00:00:00pages
33307issn
2045-2322pii
srep33307journal_volume
6pub_type
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