title: The MUC1 Cytoplasmic Tail and Tandem Repeat Domains Contribute to Mammary Oncogenesis in FVB Mice.
abstract: BACKGROUND
  Though the importance of the transmembrane mucin MUC1 in mammary oncogenesis has long been recognized, the relative contributions of the cytoplasmic tail and tandem repeat domains are poorly understood.
  
  
  METHODS
  To address this, mouse models of mammary carcinogenesis were created expressing full-length, cytoplasmic tail-deleted, or tandem repeat-deleted MUC1 constructs.
  
  
  RESULTS
  Overexpression of full-length MUC1 resulted in tumor formation in young mice (≤12 months); however, loss of either the cytoplasmic tail or the tandem repeat domain abrogated this oncogenic capacity. Aged mice in all strains developed late-onset mammary tumors similar to those previously described for the FVB background.
  
  
  CONCLUSIONS
  This study is the first spontaneous cancer model to address the relative importance of the cytoplasmic tail and tandem repeat domains to MUC1-driven mammary oncogenesis, and suggests that both of these domains are essential for tumor formation.
authors.affiliation: Department of Biochemistry and Molecular Biology.
authors.forename: Christine L
authors.initials: CL
authors.lastname: Hattrup
authors.forename: Judy M
authors.initials: JM
authors.lastname: Bradley
authors.forename: Kari L
authors.initials: KL
authors.lastname: Kotlarczyk
authors.forename: Cathy S
authors.initials: CS
authors.lastname: Madsen
authors.forename: Joseph G
authors.initials: JG
authors.lastname: Hentz
authors.forename: Ronald J
authors.initials: RJ
authors.lastname: Marler
authors.forename: Sandra J
authors.initials: SJ
authors.lastname: Gendler