title: The association between vitamin D receptor expression and prolonged overall survival in breast cancer.
abstract: In this study, we analyzed vitamin D receptor (VDR) expression and survival in a breast cancer patient cohort of 82 breast cancer patients. Immunohistochemical analysis was possible in 91.5% of the patients (75/82). Staining was evaluated using the semi-quantitative assay according to Remmele and Stegner (immunoreactivity score [IRS]). IRS 0-1 was negative/very low, IRS 2-4 was moderate to high, and IRS 6-12 was high. Statistical analysis was performed by Spearman's correlation test (p<0.05 significant). Overall survival was analyzed using Kaplan-Meier estimations. Only 6 patients had a negative IRS. Moderate IRS values were present in 20 patients. Most of the patients had a high IRS (49). For survival analysis, data were dichotomized (IRS 0-4: negative to moderate and IRS 6-12: high VDR expression). In univariate analysis, VDR expression showed significant differences in progression-free survival (PFS) and overall survival (OS). Patients with high IRS scores showed significantly better PFS and OS than patients with moderate/negative IRS scores for VDR expression. Tumor size was significantly correlated to PFS. When analyzed separately, the three different IRS groups showed significant differences in VDR expression. The present data suggest that VDR expression in breast cancer tissue may be of clinical significance, and the results provide evidence that VDR may be a factor with prognostic relevance.
authors: Department of Obstetrics and Gynecology-Großhadern, Ludwig-Maximilians-University, Munich, Germany. nina.ditsch@med.uni-muenchen.de
authors: Nina
authors: N
authors: Ditsch
authors: Bettina
authors: B
authors: Toth
authors: Doris
authors: D
authors: Mayr
authors: Miriam
authors: M
authors: Lenhard
authors: Julia
authors: J
authors: Gallwas
authors: Tobias
authors: T
authors: Weissenbacher
authors: Christian
authors: C
authors: Dannecker
authors: Klaus
authors: K
authors: Friese
authors: Udo
authors: U
authors: Jeschke
mesh_terms: D001943:Breast Neoplasms / Q000175:diagnosis* / Q000378:metabolism*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D011379:Prognosis; D018167:Receptors, Calcitriol / Q000032:analysis / Q000096:biosynthesis / Q000378:metabolism*; D015996:Survival Rate
chemical_list: D018167:Receptors, Calcitriol