Breast cancer metastasis (IMAGE) Rockefeller University Caption When mice are engineered to carry a variant of the human PCSK9 gene, they experience higher rates of breast cancer metastasis, as is apparent in these images of mouse lung tissue showing PCSK9’s impact. Credit Elizabeth And Vincent Meyer Laboratory Of Systems Cancer Biology at Rockefeller University Usage Restrictions Image may only be used to illustrate research described in the accompanying release. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.