PrimeKG

Website | bioRxiv Paper | Harvard Dataverse

Precision Medicine Knowledge Graph (PrimeKG) presents a holistic view of diseases. PrimeKG integrates 20 high-quality biomedical resources to describe 17,080 diseases with 4,050,249 relationships representing ten major biological scales, considerably expanding previous efforts in disease-rooted knowledge graphs. We accompany PrimeKG’s graph structure with text descriptions of clinical guidelines for drugs and diseases to enable multimodal analyses.

Updates

• PrimeKG is live on bioRxiv and Harvard Dataverse!

Unique Features of PrimeKG

• Diverse coverage of diseases: PrimeKG contains over 17,000 diseases including rare dieases. Disease nodes in PrimeKG are densely connected to other nodes in the graph and have been optimized for clinical relevance in downstream precision medicine tasks.
• Heterogeneous knowledge graph: PrimeKG contains over 100,000 nodes distributed over various biological scales as depicted below. PrimeKG also contains over 4 million relationships between these nodes distributed over 29 types of edges.
• Multimodal integration of clinical knowledge: Disease and drug nodes in PrimeKG are augmented with clinical descriptors that come from medical authorities such as Mayo Clinic, Orphanet, Drug Bank, and so forth.
• Ready-to-use datasets: PrimeKG is minimally dependent on external packages. Our knowledge graph can be retrieved in a ready-to-use format from Harvard Dataverse.
• Data functions: PrimeKG provides extensive data functions, including processors for primary resources and scripts to build an updated knowledge graph.

Environment setup

Using pip

To install the dependencies required to run the PrimeKG code, use pip:

pip install -r requirements.txt

Or use conda

conda env create --name PrimeKG --file=environments.yml

Building an updated PrimeKG

Downloading primary data resources

All persistent identifiers and weblinks to download the 20 primary data resources used to build PrimeKG are systematically provided in the Data Records section of our article. We have also mentioned the exact filenames that were downloaded from each resource for easy corroboration.

Curating primary data resources

We provide the scripts used to process all primary data resources and the names of the resulting output files generated by those scripts. We would be happy to share the intermediate processing datasets that were used to create PrimeKG on request.

Harmonizing datasets into PrimeKG

The code to harmonize datasets and construct PrimeKG is available at build_graph.ipynb. Simply run this jupyter notebook in order to construct the knowledge graph form the outputs of the processing files mentioned above. This jupyter notebook produces all three versions of PrimeKG, kg_raw.csv, kg_giant.csv, and the complete version kg.csv.

Feature extraction

The code required to engineer features can be found at engineer_features.ipynb and mapping_mayo.ipynb.

Cite Us

If you find PrimeKG useful, cite our work:

@article{chandak2022building,
  title={Building a knowledge graph to enable precision medicine},
  author={Chandak, Payal and Huang, Kexin and Zitnik, Marinka},
  journal={bioRxiv},
  doi={10.1101/2022.05.01.489928},
  URL={https://www.biorxiv.org/content/early/2022/05/01/2022.05.01.489928},
  year={2022}
}

Data Server

PrimeKG is hosted on Harvard Dataverse with the following persistent identifier https://doi.org/10.7910/DVN/IXA7BM. When Dataverse is under maintenance, PrimeKG datasets cannot be retrieved. That happens rarely; please check the status on the Dataverse website.

License

PrimeKG codebase is under MIT license. For individual dataset usage, please refer to the dataset license found in the website.