Abstract:
:The ionotropic P2X7 receptor (P2X7R) has become the focus of intense research interest for a number of reasons: i) it is a cation selective ion channel that is modulated by extracellular ATP. Upon stimulation by high concentrations of ATP it generates a non-selective membrane pore which is permeable to hydrophilic molecules with molecular weight up to 900 Da. ii) Though its physiological function is yet to be fully understood, there is high P2X7R expression in microglia. Importantly, this implies a pivotal role for the P2X7R in neuro-inflammatory and -degenerative processes. In addition, P2X7R-stimulated release of traditional neurotransmitters in the brain, such as glutamate and GABA, further supports the involvement of P2X7R in neuro-inflammatory and -degenerative processes. P2X7-knockout animals are also found to be resistant to inflammation and neuropathic pain, which suggests that P2X7 antagonists could potentially serve as all-purpose analgesics. Recent advances in the development of P2X7R ligands have resulted in identification of several different classes of P2X7R antagonists, including ATP analogues (oxidized ATP), dyes (Brilliant Blue G), tyrosine derivatives (KN-62 and KN-04), cyclic imides, adamantane and benzamide derivatives. A KN-62 related radioligand has also recently been reported for use in receptor binding assays. A more extensive range of potent, selective P2X7R ligands is required for a better understanding of the cascade of cellular processes associated with the P2X7R. This article will review P2X7R ligands discovered to date, together with their biological activity and therapeutic potential.
journal_name
Curr Med Chemjournal_title
Current medicinal chemistryauthors
Gunosewoyo H,Coster MJ,Kassiou Mdoi
10.2174/092986707780831023subject
Has Abstractpub_date
2007-01-01 00:00:00pages
1505-23issue
14eissn
0929-8673issn
1875-533Xjournal_volume
14pub_type
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