The present invention provides progastrin-binding molecules that are useful therapeutically for passive immunization against progastrin in gastrin-promoted diseases or conditions. The progastrin-binding molecules are specific for progastrin but do not bind gastrin-17(G17), gastrin-34(G34), glycine-extended gastrin-17(G17-Gly) or glycine-extended gastrin-34(G34-Gly). The progastrin-binding molecules include monoclonal antibodies (MAbs) selective for sequences at the N-terminus and the C-terminus of the gastrin precursor molecule, progastrin.
