TCGAbiolinks

TCGAbiolinks provides functions to retrieve, integrate, preprocess, analyze, and visualize The Cancer Genome Atlas (TCGA) clinical and molecular data (including RNA and DNA methylation) from over 10,000 tumor patients across 33 tumor types to support discovery of genomic and epigenomic alterations.

Key Features:

• Data Retrieval and Integration: Accesses TCGA repositories and integrates clinical information with molecular data types including RNA and DNA methylation to create unified datasets.
• Pre-processing Strategies: Implements tailored pre-processing methods for TCGA datasets to prepare data for downstream analyses.
• Standard Analyses and Custom Pipelines: Provides multiple analytical methods and supports construction of custom analysis pipelines to perform reproducible analyses.
• Visualization Tools: Includes functions for graphical representation of complex molecular and clinical data.
• Reproducibility: Supports downloading specific data versions to enable reproduction of earlier analyses.

Scientific Applications:

• Marker Discovery: Facilitates identification of genomic and epigenomic alterations associated with tumor types using TCGA-derived data.
• Novel Pathway Elucidation: Enables implementation of methods to uncover new biological pathways and diagnostic markers from integrated molecular and clinical datasets.

Methodology:

Provides a guided workflow using computer science and statistical methodologies for data retrieval and integration of TCGA clinical, RNA and DNA methylation data, tailored pre-processing, standard analyses and custom pipelines implemented via Bioconductor packages, demonstrated with case studies on Kidney, Brain, Breast, and Colon tumor datasets.