The Bult Lab

Carol Bult, Professor

Principal Investigator: Carol Bult, Ph.D.

The Jackson Laboratory
Bar Harbor, ME

Bridging the digital biology divide, integrating computation with biomedical research.

Full Scientific Report

The Mouse Tumor Biology (MTB) database

The MTB database is the most comprehensive publicly accessible database on cancer characteristics in inbred and genetically modified strains of mice. The data in MTB include strain characteristics for hyperplasias and neoplasias, histopathology reports and images, and tumor genetics. Data are obtained both from the primary literature and by direct submissions from cancer researchers. MTB is accessed via the Mouse Genome Informatics website (

Computational prediction of gene function

One of the great challenges in genome informatics is the integration of heterogeneous data to drive hypotheses about genes and their putative functions and disease associations. By leveraging the knowledge represented in the Mouse Genome Informatics database along with existing and emerging large-scale genomic and phenotypic data, my collaborators and I have generated computational predictions of gene function and phenotype associations using a Bayesian network approach. These predictions can be accessed from MouseMap ( or the KOMPute website ( MouseMap represents tissue specific functional networks. KOMPute was developed in response to the second phase of the Knockout Mouse Project (KOMP) initiative to perform large-scale phenotyping of “knock out” mice.  KOMPute provides predictions of both gene function and phenotype associations of genes that have been targeted by the KOMP project.

Patient Derived Xenografts (PDX) and Cancer Avatar Program

The JAX Patient Derived Xenograft (PDX) and Cancer Avatar Program is a unique resource developed in collaboration with research and clinical centers around the country. Solid and liquid tumor specimens from consenting patients are being transplanted into immune deficient mice that are specifically designed for propagation of human cells and tissues. The PDX resource currently contains over 400 established models for over 20 different tumor types. Each PDX model is comprehensively annotated with clinical annotation from the donating patients (de-identified) and with genomic characteristics of the tumors. Many of the models have been tested for their response to treatment with standard-of-care drug therapies. The PDX web portal from the Mouse Tumor Biology website ( provides access to information and data associated with the JAX PDX Resource.

The related Cancer Avatar Program uses the data generated by the PDX resource to develop genomic signatures related to treatment responses to advance the practice of precision oncology whereby the genome of a patient’s tumor can be used to guide individualized treatment programs.