Description

The Wfs1 Knockout INS-1 Cell Line is a CRISPR/Cas9-edited knockout cell line derived from the rat insulinoma INS-1 background, in which targeted disruption of the Wfs1 gene eliminates functional wolframin expression. This cell line provides a defined loss-of-function model for investigating Wfs1-dependent endoplasmic reticulum stress responses, calcium homeostasis, and insulin secretion in pancreatic beta cells.

The INS-1 cell line originates from X-ray-induced rat insulinoma and is widely used as a glucose-responsive, insulin-secreting beta-cell model. These cells retain key features of primary beta cells, including regulated insulin secretion in response to glucose and other secretagogues, expression of beta-cell transcription factors, and sensitivity to ER stress inducers. The INS-1 background enables direct analysis of beta-cell-specific pathways and dysfunction mechanisms without the complexity of primary islet preparations.

Wfs1 encodes wolframin, a transmembrane endoplasmic reticulum protein that critically modulates the unfolded protein response and intracellular calcium homeostasis. Wolframin interacts directly with calmodulin and the sarco/endoplasmic reticulum Ca2?-ATPase (SERCA), and associates with ER chaperones and proteasome subunits. It is regulated by the canonical ER stress sensors IRE1, PERK, and ATF6, and its expression is transcriptionally controlled by XBP1 and ATF6. Downstream, wolframin influences the expression of BiP/GRP78 and CHOP through the PERK?CeIF2?? and ATF6 branches of the UPR, and modulates insulin gene transcription and proinsulin processing, thereby coupling ER function with beta-cell secretory activity.

In the INS-1 host cell context, Wfs1 knockout disrupts the adaptive capacity of the UPR, sensitizing beta cells to ER stress-induced apoptosis and impairing glucose-stimulated insulin secretion. Loss of wolframin function recapitulates key pathological features observed in Wolfram syndrome and type 2 diabetes, including ER dilation, oxidative stress, and beta-cell dysfunction. This cell line thus provides a physiologically relevant platform for dissecting the molecular links between ER stress, calcium dysregulation, and insulin secretion defects.

The Wfs1 Knockout INS-1 Cell Line supports diverse research applications, including mechanistic studies of ER stress signaling in beta cells, modeling of Wolfram syndrome and diabetes pathogenesis, and screening of pharmacological modulators of the UPR and insulin secretion. Representative assays include western blotting for UPR markers such as BiP and CHOP, RT-qPCR for insulin and ER stress genes, immunofluorescence staining for insulin, calcium imaging, apoptosis assays, and glucose-stimulated insulin secretion measurements. For questions about this product or custom cell line engineering, please contact Ascent Research.