Home
Add
Get on Google Play
Home
> Edit
Add/Update Thesis
Title*
Author's Name*
Supervisor's Name
Abstract
Background: Previous studies have shown that reduced vitamin D receptor expression in breast cancer tissue is associated with worse disease outcomes. Furthermore, studies show that estrogen negative and triple negative breast cancer is associated with a poor prognosis and a low breast tissue vitamin D receptor (VDR) expression. Other studies also report that low serum vitamin D levels are associated with more aggressive breast cancer. Methods: This was a cross-sectional study with both a retrospective and a prospective arm. The retrospective part was nested within a larger study; previously constructed tissue microarray blocks (TMA) blocks were used for analysis of VDR expression. The prospective arm recruited women who underwent a breast biopsy for suspicious breast lesions in whom blood samples for serum vitamin D levels and tumour VDR immunohistochemistry were collected. Questionnaire data on pre-determined patient and tumour characteristics were extracted from the charts. Tissue expression of VDR was analysed on immunohistochemistry and serum vitamin D levels assayed. Results: A total of 214 cases were recruited retrospectively and 24 prospectively. There was a statistically significant difference in the VDR score of the Triple negative breast cancer (TNBC) subtype compared to the other subtypes (p value = 0.047, test = ANOVA: Kruskal Wallis Test). There was a positive correlation of VDR score and tumour size. There was a weak negative correlation between VDR score and human epidermal growth factor receptor 2 (HER 2) but no correlation with ER and PR. There was a positive correlation between serum vitamin D levels and VDR Immunoreactive score (IRS). Conclusions: Our results suggest that low or negative VDR score is a marker of poor prognosis in breast cancer as the expression was low in TNBC. However, high VDR score was not associated with ER or PR expressing tumours. The weak negative correlation with tumour size suggests an association of low VDR expression with aggressive tumour features. A randomized controlled trial exploring the utility of vitamin D supplementation or other VDR ligand analogues in TNBC is recommended. A larger study is recommended to determine if indeed there is a correlation between serum vitamin D levels and VDR expression.
Subject/Specialization
Language
Program
Faculty/Department's Name
Institute Name
Univeristy Type
Public
Private
Campus (if any)
Institute Affiliation Inforamtion (if any)
City where institute is located
Province
Country
Degree Starting Year
Degree Completion Year
Year of Viva Voce Exam
Thesis Completion Year
Thesis Status
Completed
Incomplete
Number of Pages
Urdu Keywords
English Keywords
Link
Select Category
Religious Studies
Social Sciences & Humanities
Science
Technology
Any other inforamtion you want to share such as Table of Contents, Conclusion.
Your email address*