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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

P2X purinergic receptor antagonist accelerates skin barrier repair and prevents epidermal hyperplasia induced by skin barrier disruption.

The effects of ATP receptor agonists/antagonists on skin barrier recovery rate were evaluated in hairless mice. Topical application of ATP and alpha,beta-methylene ATP (agonist of P2X receptor) delayed barrier recovery. Topical application of suramin (nonspecific ATP receptor antagonist), pyridoxal-phosphate-6-azophenyl-2',4'-disulfonic acid (PPADS) (P2X receptor antagonist), and 2',3'-O-(2,4,6-trinitrophenyl)adenosine 5'-triphosphate (TNP-ATP) (P2X1, P2X3, P2X2/3 antagonist) after barrier disruption accelerated the barrier repair. The P2Y type receptor antagonist Reactive Blue 2 did not affect the barrier repair process. Moreover, topical application of TNP-ATP prevented epidermal hyperplasia induced by barrier insult under low environmental humidity. ATP was secreted immediately after tape stripping on skin in organ culture. alpha,beta-Methylene ATP increased intercellular calcium in cultured keratinocytes and the increase was blocked by TNP-ATP. Both reverse transcription polymerase chain reaction assay and immunohistochemical study showed the existence of protein that had a structure similar to P2X3 on hairless mouse epidermis. These results suggest that cutaneous barrier homeostasis can be regulated by cation flux through a P2X3-like ATP receptor.[1]

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