| RRC ID |
10915
|
| Author |
Mezaki Y, Yoshikawa K, Yamaguchi N, Miura M, Imai K, Kato S, Senoo H.
|
| Title |
Rat hepatic stellate cells acquire retinoid responsiveness after activation in vitro by post-transcriptional regulation of retinoic acid receptor alpha gene expression.
|
| Journal |
Arch Biochem Biophys
|
| Abstract |
Activation of hepatic stellate cells (HSCs) is a key process in liver fibrogenesis and retinoid loss is a remarkable feature of activated HSCs. However, roles of retinoids in liver fibrogenesis are obscure. We show that mRNA levels of RARalpha, beta and gamma were decreased during rat HSC activation in vitro. However, protein levels of RARalpha and beta were increased during HSC activation. A retinoic acid response element-containing luciferase assay indicated that HSCs became responsive to retinoids only after activation in vitro and that this response was mediated by, at least in part, RARalpha subtype. Immunocytochemical analysis showed that RARalpha proteins were mainly distributed in cytosol as many spots. All-trans retinoic acid treatment strongly lowered the cytosolic RARalpha protein levels. These results indicate that rat HSCs become retinoid responsive after activation in vitro, through post-transcriptional up-regulation of RARalpha gene expression.
|
| Volume |
465(2)
|
| Pages |
370-9
|
| Published |
2007-9-15
|
| DOI |
10.1016/j.abb.2007.06.024
|
| PII |
S0003-9861(07)00306-2
|
| PMID |
17693386
|
| MeSH |
Animals
Cells, Cultured
Gene Expression Regulation / drug effects
Gene Expression Regulation / physiology*
Hepatocytes / drug effects
Hepatocytes / metabolism*
Male
RNA Processing, Post-Transcriptional / drug effects
RNA Processing, Post-Transcriptional / physiology*
Rats
Rats, Wistar
Receptors, Retinoic Acid / metabolism*
Retinoic Acid Receptor alpha
Retinoids / metabolism*
Retinol-Binding Proteins / metabolism*
Retinol-Binding Proteins, Cellular
Transcriptional Activation / drug effects
Transcriptional Activation / physiology
Tretinoin / administration & dosage*
|
| IF |
3.391
|
| Times Cited |
17
|
|
WOS Category
|
BIOPHYSICS
BIOCHEMISTRY & MOLECULAR BIOLOGY
|
| Resource |
| Human and Animal Cells |
F9(RCB1555) |
