Abstract
Dicer knockout mouse models demonstrated a key role for microRNAs in pancreatic β cell function. Studies to identify specific microRNA(s) associated with human (pro-)endocrine gene expression are needed. We profiled microRNAs and key pancreatic genes in 353 human tissue samples. Machine-learning workflows identified microRNAs associated with (pro-)insulin transcripts in a discovery set of islets (n=30) and insulin negative tissues (n=62). This microRNA signature was validated in remaining 261 tissues that include nine islet samples from individuals with type 2 diabetes. Top eight microRNAs (miR-183-5p, -375-3p, 216b-5p, 183-3p, -7-5p, -217-5p, -7-2-3p and -429-3p) were confirmed to be associated with and predictive of (pro-)insulin transcript levels. Use of doxycycline-inducible microRNA overexpressing human pancreatic duct cell lines, confirmed the regulatory roles of these microRNAs in (pro-)endocrine gene expression. Whereas knockdown of these microRNAs in human islet cells reduced (pro-)insulin transcript abundance. Our data provide specific microRNAs to further study microRNA-mRNA interactions in regulating insulin transcription.
Original language | English |
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Article number | 102379 |
Number of pages | 47 |
Journal | iScience |
Volume | 24 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2021 |