Protocol to measure insulin secretion dynamics from single mouse islets using a microfluidic fluorescence anisotropy immunoassay

The dynamics of glucose-stimulated insulin secretion (GSIS) from islets offer valuable insight into β cell metabolism. Here, we present a protocol for using a microfluidic device (i.e., InsC-chip) to measure the temporal dynamics of GSIS from individual mouse islets. We describe the steps for fabricating polydimethylsiloxane (PDMS)-based chips through soft lithography. We then present detailed procedures for employing the InsC-chip to measure insulin secretion from either four or eight individual islets, with the option for simultaneous live-cell imaging of the islet. For complete details on the use and execution of this protocol, please refer to Wang et al.¹.