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Lucae, S. et al.

P2RX7, a gene coding for a purinergic ligand-gated ion channel, is associated with major depressive disorder.

The P2RX7 gene is located within a region on chromosome 12q24.31 that has been identified as a susceptibility locus for affective disorders by linkage and association studies. P2RX7 is a purinergic ATP-binding calcium channel expressed in neurons as well as in microglial cells in various brain regions. We investigated 29 single nucleotide polymorphisms (SNPs) within the P2RX7 gene and adjacent genes in a sample of 1000 German Caucasian patients suffering from recurrent major depressive disorder ( MDD). These were contrasted with diagnosed healthy Caucasian controls from the same population (n=1029). A non-synonymous coding SNP in the P2RX7 gene (rs2230912), previously found to be associated with bipolar disorder, was significantly associated (P=0.0019) with MDD. This polymorphism results in an amino acid exchange in the C-terminal cytosolic domain of the P2RX7 channel protein, suggesting that the observed P2RX7 polymorphism might play a causal role in the development of depression.[1]

References

P2RX7, a gene coding for a purinergic ligand-gated ion channel, is associated with major depressive disorder. Lucae, S., Salyakina, D., Barden, N., Harvey, M., Gagné, B., Labbé, M., Binder, E.B., Uhr, M., Paez-Pereda, M., Sillaber, I., Ising, M., Brückl, T., Lieb, R., Holsboer, F., Müller-Myhsok, B. Hum. Mol. Genet. (2006) [Pubmed]

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