PUBLICATION
FOXN3 Regulates Hepatic Glucose Utilization
- Authors
- Karanth, S., Zinkhan, E.K., Hill, J.T., Yost, H.J., Schlegel, A.
- ID
- ZDB-PUB-160614-8
- Date
- 2016
- Source
- Cell Reports 15(12): 2745-55 (Journal)
- Registered Authors
- Hill, Jonathon, Karanth, Santhosh, Schlegel, Amnon, Yost, H. Joseph
- Keywords
- none
- Datasets
- GEO:GSE80003
- MeSH Terms
-
- Hep G2 Cells
- Blood Glucose/metabolism
- Proto-Oncogene Proteins c-myc/metabolism
- Humans
- Animals
- Glycolysis/genetics
- Down-Regulation/genetics
- Male
- Models, Biological
- Risk Factors
- Zebrafish
- Liver/metabolism*
- Rats
- Alleles
- Fasting/blood
- Polymorphism, Single Nucleotide/genetics
- Glucose/metabolism*
- Repressor Proteins/genetics
- Repressor Proteins/metabolism*
- PubMed
- 27292639 Full text @ Cell Rep.
Citation
Karanth, S., Zinkhan, E.K., Hill, J.T., Yost, H.J., Schlegel, A. (2016) FOXN3 Regulates Hepatic Glucose Utilization. Cell Reports. 15(12):2745-55.
Abstract
A SNP (rs8004664) in the first intron of the FOXN3 gene is associated with human fasting blood glucose. We find that carriers of the risk allele have higher hepatic expression of the transcriptional repressor FOXN3. Rat Foxn3 protein and zebrafish foxn3 transcripts are downregulated during fasting, a process recapitulated in human HepG2 hepatoma cells. Transgenic overexpression of zebrafish foxn3 or human FOXN3 increases zebrafish hepatic gluconeogenic gene expression, whole-larval free glucose, and adult fasting blood glucose and also decreases expression of glycolytic genes. Hepatic FOXN3 overexpression suppresses expression of mycb, whose ortholog MYC is known to directly stimulate expression of glucose-utilization enzymes. Carriers of the rs8004664 risk allele have decreased MYC transcript abundance. Human FOXN3 binds DNA sequences in the human MYC and zebrafish mycb loci. We conclude that the rs8004664 risk allele drives excessive expression of FOXN3 during fasting and that FOXN3 regulates fasting blood glucose.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping