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- W2008749905 abstract "Extracellular purines have multiple functional roles in development, plastic remodelling, and regeneration of the CNS by stimulating certain P2X/Y receptor (R) subtypes. In the present study we elucidated the involvement of P2YRs in neuronal fibre outgrowth in the developing nervous system. We particularly focused on the P2Y1R subtype and the dopaminergic system, respectively. For this purpose, we used organotypic slice co-cultures consisting of the ventral tegmental area/substantia nigra (VTA/SN) and the prefrontal cortex (PFC). After detecting the presence of the P2Y1R in VTA/SN, PFC, and on outgrowing fibres in the border region (e.g. on glial processes) connecting both brain slices, we could show that pharmacological modulation of the receptor influenced neuronal fibre outgrowth. Biocytin-tracing and tyrosine hydroxylase-immunolabelling together with quantitative image analysis revealed a significant increase in fibre growth in the border region of the co-cultures after treatment with ADPβS (P2Y1,12,13R agonist). The observed stimulatory potential of ADPβS was inhibited by pre-treatment with the P2X/YR antagonist PPADS. In P2Y1R knockout (P2Y1R(-/-)) mice, the ADPβS-induced stimulatory effect was absent, while growth was significantly enhanced in the co-cultures of the respective wild-type. This observation was confirmed in entorhino-hippocampal co-cultures, an example of a different projection system, expressing the P2Y1R. Using wortmannin and PD98059 we further showed that PI3K/Akt and MAPK/ERK cascades are involved in the mechanism underlying ADPβS-induced fibre growth. In conclusion, the data of this study clearly indicate that activation of the P2Y1R stimulates fibre growth and thereby emphasises the general role of this particular receptor subtype during development and regeneration." @default.
- W2008749905 created "2016-06-24" @default.
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- W2008749905 creator A5055341964 @default.
- W2008749905 creator A5081745338 @default.
- W2008749905 date "2015-06-01" @default.
- W2008749905 modified "2023-09-26" @default.
- W2008749905 title "P2Y1 receptor mediated neuronal fibre outgrowth in organotypic brain slice co-cultures" @default.
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- W2008749905 doi "https://doi.org/10.1016/j.neuropharm.2015.02.001" @default.
- W2008749905 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25683778" @default.
- W2008749905 hasPublicationYear "2015" @default.
- W2008749905 type Work @default.