title: Clinicopathological Significance of TARBP2, APP, and ZNF395 in Breast Cancer.
abstract: The double-stranded RNA-binding protein TARBP2 has been suggested to act as an upstream regulator of breast cancer metastasis by destabilizing transcripts of the possible metastasis suppressors amyloid precursor protein (APP) and ZNF395. We examined this hypothesis by immunostaining of TARBP2, APP, and ZNF395 in 200 breast cancer specimens using tissue microarrays and analyzed the relationships between expression levels and clinicopathological parameters and prognosis. Increased TARBP2 overexpression was associated with shorter overall survival and disease-free survival, and increased but not reduced APP expression correlated with lower overall survival and disease-free survival. ZNF395 expression levels had no prognostic value, but reduced expression correlated with reduced lymph node metastasis. There was no significant relationship between TARBP2 overexpression and reduced APP and/or ZNF395 expression. Patients with tumors with higher TARBP2 or APP expression had unfavorable prognoses. Although reduced ZNF395 expression was significantly related to reduced lymph node metastasis, further studies are needed to clarify the role of TARBP2/APP/ZNF395 in breast cancer.
authors.affiliation: Department of Pathology, St. Marianna University School of Medicine, Kawasaki, Japan.; Division of Breast and Endocrine Surgery, Department of Surgery, St. Marianna University School of Medicine, Kawasaki, Japan.
authors.forename: Ryoko
authors.initials: R
authors.lastname: Oi
authors.affiliation: Department of Pathology, St. Marianna University School of Medicine, Kawasaki, Japan.
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Koizumi
authors.affiliation: Department of Pathology, St. Marianna University School of Medicine, Kawasaki, Japan.
authors.forename: Ichiro
authors.initials: I
authors.lastname: Maeda
authors.affiliation: Department of Pathology, St. Marianna University School of Medicine, Kawasaki, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Noguchi
authors.affiliation: Unit of Medical Informatics, Faculty of Education and Culture, St. Marianna University School of Medicine, Kawasaki, Japan.
authors.forename: Shinobu
authors.initials: S
authors.lastname: Tatsunami
authors.affiliation: Division of Breast and Endocrine Surgery, Department of Surgery, St. Marianna University School of Medicine, Kawasaki, Japan.
authors.forename: Tsuguo
authors.initials: T
authors.lastname: Iwatani
authors.affiliation: Division of Breast and Endocrine Surgery, Department of Surgery, St. Marianna University School of Medicine, Kawasaki, Japan.
authors.forename: Hisanori
authors.initials: H
authors.lastname: Kawamoto
authors.affiliation: Division of Breast and Endocrine Surgery, Department of Surgery, St. Marianna University School of Medicine, Kawasaki, Japan.
authors.forename: Koichiro
authors.initials: K
authors.lastname: Tsugawa
authors.affiliation: Department of Pathology, St. Marianna University School of Medicine, Kawasaki, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Takagi
keywords: TARBP2; ZNF395; amyloid precursor protein; breast cancer; immunohistochemistry; metastasis