Fig. 3.
Purinergic receptors have effects on β-cell mass. Receptors marked in green increase β-cell mass (proliferation/replication), while those marked in red mediate β-cell death (apoptosis). Some purinergic receptors exert cytoprotective actions when cells are exposed to other factors, e.g. cytokines. The effects of P1 and P2 receptor stimulation on cell viability and/or insulin release may be dependent on concentrations of nucleotides/sides. For details, see the text