Cell-type, allelic, and genetic signatures in the human pancreatic beta cell transcriptome.

Abstract:

:Elucidating the pathophysiology and molecular attributes of common disorders as well as developing targeted and effective treatments hinges on the study of the relevant cell type and tissues. Pancreatic beta cells within the islets of Langerhans are centrally involved in the pathogenesis of both type 1 and type 2 diabetes. Describing the differentiated state of the human beta cell has been hampered so far by technical (low resolution microarrays) and biological limitations (whole islet preparations rather than isolated beta cells). We circumvent these by deep RNA sequencing of purified beta cells from 11 individuals, presenting here the first characterization of the human beta cell transcriptome. We perform the first comparison of gene expression profiles between beta cells, whole islets, and beta cell depleted islet preparations, revealing thus beta-cell-specific expression and splicing signatures. Further, we demonstrate that genes with consistent increased expression in beta cells have neuronal-like properties, a signal previously hypothesized. Finally, we find evidence for extensive allelic imbalance in expression and uncover genetic regulatory variants (eQTLs) active in beta cells. This first molecular blueprint of the human beta cell offers biological insight into its differentiated function, including expression of key genes associated with both major types of diabetes.

journal_name

Genome Res

journal_title

Genome research

authors

Nica AC,Ongen H,Irminger JC,Bosco D,Berney T,Antonarakis SE,Halban PA,Dermitzakis ET

doi

10.1101/gr.150706.112

subject

Has Abstract

pub_date

2013-09-01 00:00:00

pages

1554-62

issue

9

eissn

1088-9051

issn

1549-5469

pii

gr.150706.112

journal_volume

23

pub_type

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