scholarly journals Hepatic nuclear factor 1-β

Author(s):  
K. J. Lackner ◽  
D. Peetz
2003 ◽  
Vol 278 (40) ◽  
pp. 38254-38259 ◽  
Author(s):  
Stuart B. Smith ◽  
Rosa Gasa ◽  
Hirotaka Watada ◽  
Juehu Wang ◽  
Steven C. Griffen ◽  
...  

Diabetes Care ◽  
2003 ◽  
Vol 26 (2) ◽  
pp. 333-337 ◽  
Author(s):  
A. P. Lambert ◽  
S. Ellard ◽  
L. I.S. Allen ◽  
I. W. Gallen ◽  
K. M. Gillespie ◽  
...  

2004 ◽  
Vol 377 (3) ◽  
pp. 763-768 ◽  
Author(s):  
Richard WHALEN ◽  
Susan H. VOSS ◽  
Thomas D. BOYER

The acute phase response is characterized by positive and negative regulation of many liver proteins including GSTs (glutathione S-transferases) and albumin. The expression of albumin and some GSTs are dependent on HNF1 (hepatic nuclear factor 1). Interleukin 6 plus dexamethasone induce a nuclear protein (IL6DEX-NP) in rat hepatocytes in vitro that binds to a promoter element adjacent to the HNF1 site of rGSTA2 and decreases its expression. We determined how HNF1 and IL6DEX-NP regulate rGSTA2 and albumin expression in rats during the acute phase response after LPS (lipopolysaccharide) treatment. Expression of rGSTA2 and albumin mRNA decreased 3 h after LPS treatment and remained low for 48 h. Transcription rates showed a similar pattern but albumin transcription was less affected. HNF1 and IL6DEX-NP binding to the rGSTA2 promoter was present in control livers but was absent at 3 and 6 h after LPS. By 12 h, HNF1 and IL6DEX-NP binding to the rGSTA2 promoter reappeared and increased to above normal at 48 h. The patterns of HNF1 and IL6DEX-NP binding to the albumin promoter were similar. Affinity of IL6DEX-NP for the albumin promoter was less than that for the rGSTA2 promoter and changes in the transcription rates were consistent with the difference. Early decreases in rGSTA2 and albumin during the acute phase response are due to decreased binding of HNF1. Later persistent decreases in transcriptional rate of rGSTA2 and to a lesser extent albumin are due to increased IL6DEX-NP binding. IL6DEX-NP appears to be an important negative regulator of gene expression in vitro and in vivo.


Genomics ◽  
1990 ◽  
Vol 8 (1) ◽  
pp. 155-164 ◽  
Author(s):  
Ingolf Bach ◽  
Zoya Galcheva-Gargova ◽  
Marie-Geneviève Mattei ◽  
Dominique Simon-Chazottes ◽  
Jean-Louis Guénet ◽  
...  

Development ◽  
1991 ◽  
Vol 113 (2) ◽  
pp. 589-599 ◽  
Author(s):  
M. Blumenfeld ◽  
M. Maury ◽  
T. Chouard ◽  
M. Yaniv ◽  
H. Condamine

Hepatic nuclear factor 1 (HNF1) is a highly diverged homeoprotein that is crucial for transcription of many liver-specific genes including albumin. In particular, a minimal promoter, consisting of an HNF1-binding-site and a TATA box, is highly active only in hepatoma cell lines. The expression of the HNF1 and albumin genes has been examined in mouse embryos by in situ hybridization. At 10.5 days of gestation, the HNF1 mRNA was detected in both the hepatic primordia and visceral endoderm of the yolk sac whereas the albumin transcript was present only in the nascent liver. At later stages of development, HNF1 was detected in liver, in the epithelial cells of most of the digestive tract and in the cortex of the kidney, whereas albumin was again found only in the liver. The presence of HNF1 protein in adult kidney was demonstrated by immunodetection in gel-retardation assays and western blot analysis. These experiments show that, even though the HNF1 homeo-protein is essential for expression of many liver-specific genes, it cannot, by itself, force high expression levels of these genes, in non-hepatic tissues.


Sign in / Sign up

Export Citation Format

Share Document