Histone acetylation regulates p21WAF1 expression in human colon cancer cell lines.
OBJECTIVE
To investigate the effect of histone acetylation on regulation of p21WAF1 gene expression in human colon cancer cell lines.


METHODS
Two cell lines, Colo-320 and SW1116 were treated with either trichostatin or sodium butyrate. Expressions of p21WAF1 mRNA and protein were detected by real-time RT-PCR and Western blotting, respectively. Acetylation of two regions of p21WAF1 gene-associated histones and total cellular histones were examined by chromatin immunoprecipitation assay and Western blotting.


RESULTS
Trichostatin or sodium butyrate re-activated p21WAF1 transcription resulted in up-regulated p21WAF1 protein level in colon cancer cell lines. Those effects were accompanied by an accumulation of acetylated histones in total cellular chromatin and p21WAF1 gene-associated region of chromatin.


CONCLUSIONS
Histone acetylation regulates p21WAF1 expression in human colon cancer cell lines, Colo-320 and SW1116.
Renji Hospital, Shanghai Second Medical University, Shanghai Institute of Digestive Disease, Shanghai 200001, China.
Ying-Xuan
YX
Chen
Jing-Yuan
JY
Fang
Hong-Yin
HY
Zhu
Rong
R
Lu
Zhong-Hua
ZH
Cheng
De-Kai
DK
Qiu
D000107:Acetylation; D002087:Butyrates / Q000494:pharmacology; D018797:Cell Cycle Proteins / Q000235:genetics* / Q000378:metabolism; D045744:Cell Line, Tumor; D003110:Colonic Neoplasms; D050759:Cyclin-Dependent Kinase Inhibitor p21; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects / Q000502:physiology*; D006657:Histones / Q000378:metabolism*; D006801:Humans; D006877:Hydroxamic Acids / Q000494:pharmacology; D011500:Protein Synthesis Inhibitors / Q000494:pharmacology; D012333:RNA, Messenger / Q000032:analysis
D002087:Butyrates; C493956:CDKN1A protein, human; D018797:Cell Cycle Proteins; D050759:Cyclin-Dependent Kinase Inhibitor p21; D006657:Histones; D006877:Hydroxamic Acids; D011500:Protein Synthesis Inhibitors; D012333:RNA, Messenger; C012589:trichostatin A