NCIt definition : Neuregulin (heregulin) polypeptides have been shown to interact with and activate
the ErbB2, ErbB3 and ErbB4 receptor proteins, and have been found to be essential
for the normal development of the cardiovascular, pancreatic and nervous systems.
Neuregulins are involved in the normal development of mammary gland, are secreted
by breast cancer cells, and can alternatively promote or inhibit breast cancer cell
division.;