Jian Xu Laboratory

In the News

Jan. 11, 2016 — Scientists at the Children’s Medical Center Research Institute at UT Southwestern (CRI) have teamed with researchers at the Dana-Farber Cancer Institute to pioneer the use of epigenomic profiling and CRISPR-Cas9 gene editing technology in studying how transcription enhancers operate during blood-forming stem cell differentiation and the role enhancers may play in the development of blood cancers.

Transcription enhancers are noncoding sequences of DNA that regulate how, when and where protein-coding genes are expressed, which enables cells to grow and develop into the body’s various, specialized functions.

The study provides new information about the role of transcription enhancers in normal blood-forming stem cell differentiation, and demonstrates how gene editing technology might enable scientists to target the development of blood cancers by modifying certain noncoding regulatory elements that drive those cancers.

“We found that during the course of normal blood-forming stem cell differentiation, transcription enhancers undergo extensive turnover,” said Dr. Jian Xu, an Assistant Professor at CRI, an Assistant Professor of Pediatrics at UT Southwestern, and a CPRIT Scholar in Cancer Research. “We also identified a particular regulatory mechanism that helps explain how genes turn on and off during the differentiation process. Those two discoveries lay the groundwork for using the CRISPR-Cas9 gene editing technology to potentially modify gene expression regulatory elements and target the development of certain blood cancers.”

The findings also provide an opportunity for further study to determine if modification of regulatory genomic elements can advance a personalized method of targeting cancers based on individual genetic mutations.

The study was published in Developmental Cell.


Jan. 15, 2015 — The Children’s Medical Center Research Institute at UT Southwestern (CRI) recently recruited Dr. Jian Xu to become the institute’s fifth faculty member and principal investigator. Dr. Xu will lead CRI’s investigations of disease-associated genes and gene networks in blood cell development and blood disorders such as childhood leukemia. Read about Dr. Xu’s appointment at CRI.