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Together, our data provide evidence that Gpr40 modulates FFA-stimulated insulin secretion from beta-cells not only directly but also indirectly via regulation of incretin secretion. Moreover, our data suggest a conserved role for Ipf1/Pdx1 and Gpr40 in FFA-mediated secretion of hormones that regulate glucose and overall energy homeostasis.
Edfalk et al. (Tue,) studied this question.