Suppression of murine mammary carcinoma metastasis by the murine ortholog of breast cancer metastasis suppressor 1 (Brms1).
The murine ortholog (Brms1) of human breast cancer metastasis suppressor 1 shares 95% identity to the human metastasis suppressor, BRMS1, in amino acid structure. We tested Brms1 for suppression of metastasis of mouse mammary carcinoma cell line 4T1 in syngenic BALB/c mice, using orthotopic (mammary fat pad) injection as well as intravenous injection. As observed for BRMS1, transfection with Brms1 did not inhibit 4T1 primary tumor formation, but significantly suppressed lung colonization. We also show that Brms1 protein interacts with histone deacetylases, indicating involvement of Brms1 in murine Sin3-HDAC complex, like its human counterpart. Thus, because of similarities with its human ortholog, the results suggest that Brms1 will be useful as a model for studying mechanism of action of BRMS1.
Cancer Research Institute, University of South Alabama, Mobile, AL 36688, USA. rsamant@usouthal.edu
Rajeev S
RS
Samant
Michael T
MT
Debies
Douglas R
DR
Hurst
Blake P
BP
Moore
Lalita A
LA
Shevde
Danny R
DR
Welch
D000818:Animals; D045744:Cell Line, Tumor; D005260:Female; D008325:Mammary Neoplasms, Experimental / Q000473:pathology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D009362:Neoplasm Metastasis / Q000517:prevention & control*; D009363:Neoplasm Proteins / Q000502:physiology*; D012097:Repressor Proteins; D014162:Transfection
C410024:BRMS1 protein, human; D009363:Neoplasm Proteins; D012097:Repressor Proteins