ArticleNature metabolism2024
Inceptor binds to and directs insulin towards lysosomal degradation in β cells.
Article in Nature metabolism, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- From Disposal to Display: Crinophagy as a β-Cell Source of Neoantigens in Type 1 Diabetes.Immunological reviews · 2026Review
- Insulin receptor trafficking and interactions in muscle cells.Journal of the Endocrine Society · 2026Article
- ELAPOR1 mediated vesicle traffic is required for acrosome biogenesis and male fertility in mice.Cellular and molecular life sciences : CMLS · 2026Article
- Lost in translation: absence of KIAA1324/ELAPOR1 protein in pathological TDP-43-affected neurons in ALS/FTD.Acta neuropathologica communications · 2026Article
- Embryo secretome regulation of the endometrial epithelial transcriptome: development of a model to test for embryo viability.Molecular human reproduction · 2026Article
- ELAPOR1 regulates VPS54-mediated GARP complex formation and proacrosomal vesicle fusion during spermatogenesis.Theranostics · 2026Article
- Autophagy-lysosome pathway in insulin & glucagon homeostasis.Frontiers in endocrinology · 2025Review
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Authors and funding
26 authors.
Funding
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Abstract
Blunted first-phase insulin secretion and insulin deficiency are indicators of β cell dysfunction and diabetes manifestation. Therefore, insights into molecular mechanisms that regulate insulin homeostasis might provide entry sites to replenish insulin content and restore β cell function. Here, we identify the insulin inhibitory receptor (inceptor; encoded by the gene IIR/ELAPOR1) as an insulin-binding receptor that regulates insulin stores by lysosomal degradation. Using human induced pluripotent stem cell (SC)-derived islets, we show that IIR knockout (KO) results in enhanced SC β cell differentiation and survival. Strikingly, extended in vitro culture of IIR KO SC β cells leads to greatly increased insulin content and glucose-stimulated insulin secretion (GSIS). We find that inceptor localizes to clathrin-coated vesicles close to the plasma membrane and in the trans-Golgi network as well as in secretory granules, where it acts as a sorting receptor to direct proinsulin and insulin towards lysosomal degradation. Targeting inceptor using a monoclonal antibody increases proinsulin and insulin content and improves SC β cell GSIS. Altogether, our findings reveal the basic mechanisms of β cell insulin turnover and identify inceptor as an insulin degradation receptor.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.