PUBLICATION
IGFBP1 increases β-cell regeneration by promoting α- to β-cell transdifferentiation
- Authors
- Lu, J., Liu, K.C., Schulz, N., Karampelias, C., Charbord, J., Hilding, A., Rautio, L., Bertolino, P., Östenson, C.G., Brismar, K., Andersson, O.
- ID
- ZDB-PUB-160816-18
- Date
- 2016
- Source
- The EMBO journal 35(18): 2026-44 (Journal)
- Registered Authors
- Charbord, Jeremie, Karampelias, Christos, Lu, Jing, Rautio, Linn, Schulz, Nadja
- Keywords
- diabetes, insulin, regeneration, zebrafish, β cell
- MeSH Terms
-
- Cell Transdifferentiation*
- Regeneration*
- Glucagon-Secreting Cells/physiology*
- Insulin-Like Growth Factor Binding Protein 1/metabolism*
- Zebrafish
- PubMed
- 27516442 Full text @ EMBO J.
Abstract
There is great interest in therapeutically harnessing endogenous regenerative mechanisms to increase the number of β cells in people with diabetes. By performing whole-genome expression profiling of zebrafish islets, we identified 11 secreted proteins that are upregulated during β-cell regeneration. We then tested the proteins' ability to potentiate β-cell regeneration in zebrafish at supraphysiological levels. One protein, insulin-like growth factor (Igf) binding-protein 1 (Igfbp1), potently promoted β-cell regeneration by potentiating α- to β-cell transdifferentiation. Using various inhibitors and activators of the Igf pathway, we show that Igfbp1 exerts its regenerative effect, at least partly, by inhibiting Igf signaling. Igfbp1's effect on transdifferentiation appears conserved across species: Treating mouse and human islets with recombinant IGFBP1 in vitro increased the number of cells co-expressing insulin and glucagon threefold. Moreover, a prospective human study showed that having high IGFBP1 levels reduces the risk of developing type-2 diabetes by more than 85%. Thus, we identify IGFBP1 as an endogenous promoter of β-cell regeneration and highlight its clinical importance in diabetes.
Genes / Markers
Figure Gallery (8 images)
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping