for people ages 18 years and up (full criteria)
at La Jolla, California and other locations
study started
estimated completion
Principal Investigator
by Shumei Kato
Headshot of Shumei Kato
Shumei Kato



This trial screens patients with colon or rectal cancer that has spread to other places in the body (metastatic) or cannot be removed by surgery (unresectable) for genetic mutations for recommendation to a molecularly assigned therapy. Identifying gene mutations may help patients enroll onto target companion trials that target these mutations.

Official Title

COLOMATE: Colorectal Cancer Liquid Biopsy Screening Protocol for Molecularly Assigned Therapy



  1. To perform blood-based genomic profiling on patients with treatment refractory metastatic colorectal cancer (CRC) to facilitate accrual to molecularly assigned therapies.

II. To facilitate clinically annotated genomic analyses.


Patients submit blood samples for genetic testing.


Metastatic Colon Adenocarcinoma, Metastatic Rectal Adenocarcinoma, Stage III Colon Cancer AJCC v8, Stage III Rectal Cancer AJCC v8, Stage IIIA Colon Cancer AJCC v8, Stage IIIA Rectal Cancer AJCC v8, Stage IIIB Colon Cancer AJCC v8, Stage IIIB Rectal Cancer AJCC v8, Stage IIIC Colon Cancer AJCC v8, Stage IIIC Rectal Cancer AJCC v8, Stage IV Colon Cancer AJCC v8, Stage IV Rectal Cancer AJCC v8, Stage IVA Colon Cancer AJCC v8, Stage IVA Rectal Cancer AJCC v8, Stage IVB Colon Cancer AJCC v8, Stage IVB Rectal Cancer AJCC v8, Stage IVC Colon Cancer AJCC v8, Stage IVC Rectal Cancer AJCC v8, Unresectable Colon Adenocarcinoma, Unresectable Rectal Adenocarcinoma, Adenocarcinoma, Rectal Neoplasms, Colonic Neoplasms, Genetic Testing


You can join if…

Open to people ages 18 years and up

  • Histological confirmation of adenocarcinoma of the colon or rectum that is metastatic and/ or unresectable
  • Progression, intolerance, or contraindication to a fluoropyrimidine (e.g., 5- fluorouracil or capecitabine), oxaliplatin, irinotecan, an anti-VEGF monoclonal antibody (bevacizumab, ziv-aflibercept, or ramucirumab), and an anti-PD-1 monoclonal antibody (nivolumab or pembrolizumab) if tumor has deficient mismatch repair proteins (dMMR) or is microsatellite instability-high (MSI-H)
  • For patients with KRAS and NRAS wild-type tumors, progression, intolerance, or contraindication to an anti-EGFR monoclonal antibody (cetuximab or panitumumab)
    • Note: If tissue is known to be positive for HER2 expression (IHC 3+) or the tumor has ERBB2 (HER2) amplification detected by a Clinical Laboratory Improvement Act (CLIA)-certified assay, prior treatment with anti-EGFR therapy is not required
  • At least one site of disease that is measurable by Response Evaluation Criteria in Solid Tumors (RECIST) criteria (version 1.1) that has not been previously irradiated; if the patient has had previous radiation to the target lesion(s), there must be evidence of progression since the radiation
  • Life expectancy >= 3 months per estimation of investigator
  • Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0, 1, or 2
  • Capable of understanding and complying with the protocol requirements and has signed the informed consent document
  • Satisfy at least one of the following two conditions:
    • Willing and able to provide blood sample for screening purposes
    • Guardant 360 testing completed =< 60 days prior to registration

You CAN'T join if...

  • Evidence within the last 3 years of another malignancy which required systemic treatment. EXCEPTIONS: Non-melanotic skin cancer, carcinoma-in-situ of the cervix, or localized prostate cancer with a current PSA of < 1.0mg/dL on 2 successive evaluations, at least 90 days apart, with the most recent evaluation no more than 4 weeks prior to registration
  • Unable or unwilling to abide by the study protocol or cooperate fully with the investigator or designee
  • History of solid organ transplantation
  • Pregnant or planning to become pregnant within the next 12 months


  • UC San Diego Moores Cancer Center accepting new patients
    La Jolla California 92093 United States
  • USC / Norris Comprehensive Cancer Center accepting new patients
    Los Angeles California 90033 United States

Lead Scientist at UCSD

  • Shumei Kato
    Associate Clinical Professor, Medicine, Vc-health Sciences-schools. Authored (or co-authored) 95 research publications


accepting new patients
Start Date
Completion Date
Academic and Community Cancer Research United
Study Type
Expecting 500 study participants
Last Updated