ChIP-Sequencing analysis of YY1 binding DNA in radiation-induced skin fibrosis of rats

This study aims to compared the genome-wide Ying Yang-1 (YY1) binding DNA sequences in radiation-induced fibrotic skin and adjacent normal tissues of rats by ChIP-Seq. Male Sprague-Dawley (SD) rats (4 weeks old) were irradiated with a single 45-Gy dose of irradiation was administered to the treatment area at a rate of 750 cGy/min using a 6-MeV electron beam accelerator (Clinac 2100EX, Varian Medical Systems, Inc., CA). Skin tissues from nonirradated skin areas and irradietd areas were collected and subjected to ChIP of YY1.