1. Introduction
  1.1 Background and significance
  1.2 Objectives of the study
2. Literature Review
  2.1 Overview of breast cancer
  2.2 Drug metabolism in cancer cells
  2.3 Role of drug-metabolizing enzymes in breast cancer
  2.4 Genetic variations and drug response
3. Methodology
  3.1 Cell culture and experimental design
  3.2 Analysis of drug-metabolizing enzymes
  3.3 Metabolic profiling of breast cancer cells
  3.4 Genetic analysis of drug metabolism-related genes
4. Results and Discussion
  4.1 Expression and activity of drug-metabolizing enzymes in breast cancer cells
  4.2 Metabolic pathways involved in drug metabolism
  4.3 Genetic variations and drug response in breast cancer
5. Implications and Future Directions
  5.1 Clinical implications of the findings
  5.2 Limitations and future research directions