NCIt definition : A monoclonal antibody directed against the neurohormone bombesin that is conjugated
to diethylenetriaminepenta-acetic acid (DPTA), a bifunctional chelating agent that
allows the antibody to be labeled with a metal species such as radioactive indium.
Levels of bombesin, also known as gastrin releasing peptide (GRP), are elevated in
lung and thyroid cancers, where the substance acts as an autocrine growth factor.
(NCI04);