Breast Cancer Research on Kisspeptins (video) University of Western Ontario Loading video... Caption Moshmi Bhattacharya, Ph.D., and graduate student Donna Cvetkovic describe new findings about kisspeptins. while they usually prevent the spread of cancer, kisspeptins actally make some breast cancers worse, with a higher tumor grade and metastatic potential. This was found to apply to only estrogen receptor-negative breast cancers. Credit Western University Usage Restrictions None 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.