ArticleACS sensors2024
Decoding Insulin Secretory Granule Maturation Using Genetically Encoded pH Sensors.
Article in ACS sensors, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Classifying biophysical subpopulations of insulin secretory granules using quantitative whole-cell structure analysis.Structure (London, England : 1993) · 2026Article
- Dielectrophoresis reveals stimulus-induced remodeling of insulin granule subpopulations.Biophysical journal · 2026Article
- Measurement of electrochemical brain activity with fast-scan cyclic voltammetry during functional magnetic resonance imaging.Nature protocols · 2026Review
- Integrated biophysical and spatial remodeling during insulin secretory granule maturation at the mitochondrial network.bioRxiv : the preprint server for biology · 2026Article
- Mechanistic insights into cargo sorting and export from the Golgi apparatus.Nature reviews. Molecular cell biology · 2025Review
- Secretory stimuli distinctly regulate insulin secretory granule maturation through structural remodeling.Structure (London, England : 1993) · 2025Article
- Dielectrophoresis Reveals Stimulus-Induced Remodeling of Insulin Granule Subpopulations.bioRxiv : the preprint server for biology · 2025Article
- Classifying Biophysical Subpopulations of Insulin Secretory Granules using Quantitative Whole Cell Structure Analysis.bioRxiv : the preprint server for biology · 2025Article
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
Insulin is a peptide hormone secreted from pancreatic beta cells to regulate blood glucose homeostasis. Maturation of active insulin occurs within insulin secretory granules (ISG) by acidification of the lumen and enzymatic cleavage of insulin before secretion. This process is dysregulated in diabetes, and many questions remain on how the cell controls insulin maturation. We address this gap in knowledge by designing two genetically encoded fluorescence pH sensors and a fluorescence lifetime imaging and analysis pipeline to monitor the pH of individual secretory ISGs within live cells at higher resolution and precision than previously possible. We observed different subpopulations of ISGs based on their pH and subcellular localization. Signals regulating metabolism vs membrane depolarization mobilize different subpopulations of ISGs for secretion, and we confirm that maturation signals acidify ISGs. We conclude that different signaling networks uniquely impact ISG mobilization and secretion. Future applications of these tools will be useful for exploring how these processes are dysregulated in diabetes and provide new paths for developing more effective treatments.
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Registered trials
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.