Expression of viral genes and foreign gene following infection of rMV-BNiP3 was confirmed in cells through detection of transcripts by RT-PCR and proteins by western blot analysis and IFA staining using specific antibodies to measles virus early protein, N; late protein, H, and BNiP3, thus establishing infective and replication competency of rMV-BNiP3 in breast cancer cells. The gene discussed is BNIP3; the disease is breast carcinoma.