Generation of β Cells from iPSC of a MODY8 Patient with a Novel Mutation in the Carboxyl Ester Lipase (CEL) Gene

J Clin Endocrinol Metab. 2021 Apr 23;106(5):e2322-e2333. doi: 10.1210/clinem/dgaa986.


Context: Maturity-onset diabetes of the young (MODY) 8 is a rare form of monogenic diabetes characterized by a mutation in CEL (carboxyl ester lipase) gene, which leads to exocrine pancreas dysfunction, followed by β cell failure. Induced pluripotent stem cells can differentiate into functional β cells. Thus, β cells from MODY8 patients can be generated in vitro and used for disease modelling and cell replacement therapy.

Methods: A genetic study was performed in a patient suspected of monogenic diabetes.

Results: A novel heterozygous pathogenic variant in CEL (c.1818delC) was identified in the proband, allowing diagnosis of MODY8. Three MODY8-iPSC (induced pluripotent stem cell) clones were reprogrammed from skin fibroblasts of the patient, and their pluripotency and genomic stability confirmed. All 3 MODY8-iPSC differentiated into β cells following developmental stages. MODY8-iPSC-derived β cells were able to secrete insulin upon glucose dynamic perifusion. The CEL gene was not expressed in iPSCs nor during any steps of endocrine differentiation.

Conclusion: iPSC lines from a MODY8 patient with a novel pathogenic variant in the CEL gene were generated; they are capable of differentiation into endocrine cells, and β cell function is preserved in mutated cells. These results set the basis for in vitro modelling of the disease and potentially for autologous β cell replacement.

Keywords: MODY (maturity-onset diabetes of the young); beta cells; diabetes; induced pluripotent stem cells (iPSC); stem cells.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Cell Differentiation / genetics
  • Cells, Cultured
  • DNA Mutational Analysis
  • Diabetes Mellitus, Type 2 / genetics
  • Diabetes Mellitus, Type 2 / pathology*
  • Genetic Techniques
  • Heterozygote
  • Humans
  • Induced Pluripotent Stem Cells / pathology
  • Induced Pluripotent Stem Cells / physiology*
  • Insulin-Secreting Cells / pathology
  • Insulin-Secreting Cells / physiology*
  • Lipase / genetics*
  • Male
  • Mutation
  • Primary Cell Culture


  • CEL protein, human
  • Lipase

Supplementary concepts

  • Maturity-Onset Diabetes of the Young, Type 8, with Exocrine Dysfunction