ArticleJournal of neuroscience research2008
Opposing effects of P2X(7) and P2Y purine/pyrimidine-preferring receptors on proliferation of astrocytes induced by fibroblast growth factor-2: implications for CNS development, injury, and repair.
Article in Journal of neuroscience research, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed, 26 citations in OpenAlex.
- Corrigendum: Purinergic signaling systems across comparative models of spinal cord injury.Neural regeneration research · 2023Article
- Purinergic signaling systems across comparative models of spinal cord injury.Neural regeneration research · 2022Review
- From purines to purinergic signalling: molecular functions and human diseases.Signal transduction and targeted therapy · 2021Review
- Salient brain entities labelled in P2rx7-EGFP reporter mouse embryos include the septum, roof plate glial specializations and circumventricular ependymal organs.Brain structure & function · 2021Article
- The FGF2-induced tanycyte proliferation involves a connexin 43 hemichannel/purinergic-dependent pathway.Journal of neurochemistry · 2021Article
- The Astrogenic Balance in the Aging Brain.Current neuropharmacology · 2021Review
- The Role of bFGF in the Excessive Activation of Astrocytes Is Related to the Inhibition of TLR4/NFκB Signals.International journal of molecular sciences · 2015Article
- P2X7 receptor inhibition increases CNTF in the subventricular zone, but not neurogenesis or neuroprotection after stroke in adult mice.Translational stroke research · 2013Article
- Pathophysiology of astroglial purinergic signalling.Purinergic signalling · 2012Review
- Interaction of purinergic receptors with GPCRs, ion channels, tyrosine kinase and steroid hormone receptors orchestrates cell function.Purinergic signalling · 2012Article
- Neuropeptide Y and extracellular signal-regulated kinase mediate injury-induced neuroregeneration in mouse olfactory epithelium.Molecular and cellular neurosciences · 2012Article
- P2Y receptors on astrocytes and microglia mediate opposite effects in astroglial proliferation.Purinergic signalling · 2011Article
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
Abstract
Extracellular nucleotides play important trophic roles in development and central nervous system (CNS) injury, but the functions of distinct purinergic receptors and related signaling pathways have not been fully elucidated. In the present study we identified opposing effects of P2X and P2Y receptors on the ability of FGF2 to induce proliferation in primary cultures of rat cortical astrocytes. Low concentrations of ATP enhanced DNA synthesis induced by FGF2, whereas high concentrations inhibited FGF2-induced proliferation. Comparison of concentration-response experiments with ATP and 2',3'-O-(4-benzoyl)-benzoyl-ATP (BzATP) indicated that the inhibitory effect was mediated by P2X(7) receptors. Interestingly, activation of P2X(7) receptors led to a state of reversible growth arrest rather than cell death. Selectivity studies showed that proliferation evoked by epidermal growth factor and platelet-derived growth factor was also inhibited by P2X(7) receptors, but P2X(1) or P2X(3) receptors did not inhibit proliferation induced by FGF2. A marker of mitosis, phosphohistone-3, was reduced by BzATP and increased by UTP, suggesting that the enhancing effect of ATP on FGF2-induced proliferation was mediated by P2 purine/pyrimidine receptors. Phosphorylation of the growth arrest-related protein kinases p38/MAPK and SAPK/JNK was strongly increased by BzATP but only weakly affected by UTP. We conclude that P2Y purine/pyrimidine receptors enhance proliferation induced by FGF2 in astrocytes, whereas stimulation of P2X(7) receptors inhibits proliferation by shifting cells to a state of reversible growth arrest that may be mediated by protein kinase signaling. These trophic actions of P2X(7) and P2Y purine/pyrimidine receptors may contribute to the regulation of CNS development, adult neurogenesis, and the response of astrocytes to injury.
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