You may use the following housekeeping genes. PUM1 (pumilio RNA binding family member 1) would be preferable. These are the novel housekeeping genes proved to be less variable and thus potentially more accurate for qRT-PCR in breast cancer.
PUM1 (pumilio RNA binding family member 1)
SYMPK (Symplekin)
ANKRD17 (Ankyrin repeat domain-containing protein 17)
CCSER2 (Coiled-coil serine-rich protein 2)
You may refer to the articles attached below for more information.
https://jab.zsf.jcu.cz/pdfs/jab/2020/02/03.pdf
Article Pan-Cancer Analysis of TCGA Data Revealed Promising Referenc...
Article A strategy to identify housekeeping genes suitable for analy...
Article Selecting housekeeping genes as references for the normaliza...