Glycoprotein 2 is a specific cell surface marker of human pancreatic progenitors.

Cogger KF, Sinha A, Sarangi F, McGaugh EC, Saunders D, Dorrell C, Mejia-Guerrero S, Aghazadeh Y, Rourke JL, Screaton RA, Grompe M, Streeter PR, Powers AC, Brissova M, Kislinger T, Nostro MC
Nat Commun. 2017 8 (1): 331

PMID: 28835709 · PMCID: PMC5569081 · DOI:10.1038/s41467-017-00561-0

PDX1/NKX6-1 pancreatic progenitors (PPs) give rise to endocrine cells both in vitro and in vivo. This cell population can be successfully differentiated from human pluripotent stem cells (hPSCs) and hold the potential to generate an unlimited supply of β cells for diabetes treatment. However, the efficiency of PP generation in vitro is highly variable, negatively impacting reproducibility and validation of in vitro and in vivo studies, and consequently, translation to the clinic. Here, we report the use of a proteomics approach to phenotypically characterize hPSC-derived PPs and distinguish these cells from non-PP populations during differentiation. Our analysis identifies the pancreatic secretory granule membrane major glycoprotein 2 (GP2) as a PP-specific cell surface marker. Remarkably, GP2 is co-expressed with NKX6-1 and PTF1A in human developing pancreata, indicating that it marks the multipotent pancreatic progenitors in vivo. Finally, we show that isolated hPSC-derived GP2 cells generate β-like cells (C-PEPTIDE/NKX6-1) more efficiently compared to GP2 and unsorted populations, underlining the potential therapeutic applications of GP2.Pancreatic progenitors (PPs) can be derived from human pluripotent stem cells in vitro but efficiency of differentiation varies, making it hard to sort for insulin-producing cells. Here, the authors use a proteomic approach to identify the secretory granule membrane glycoprotein 2 as a marker for PDX1+/NKX6-1+ PPs.

MeSH Terms (15)

Biomarkers, Tumor Cell Differentiation Cell Membrane Cells, Cultured GPI-Linked Proteins Homeodomain Proteins Humans Insulin-Secreting Cells Mass Spectrometry Pancreas Pluripotent Stem Cells Proteomics Stem Cells Trans-Activators Transcription Factors

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