for people ages 18 years and up (full criteria)
at La Jolla, California
study started
estimated completion
Catriona Jamieson



The purpose of the study is to investigate the safety of the investigational drug called cirmtuzumab when given for a duration of 6 to 12 months. Cirmtuzumab is a type of drug called a monoclonal antibody. This drug is designed to attach to a protein called ROR1 that is on the surface of chronic lymphocytic leukemia (CLL) cells. This blocks growth and survival of the CLL cells. ROR1 is rarely expressed on healthy cells so this drug should target the cancer cells. Cirmtuzumab is considered experimental because its use is not approved by United States (US) Food and Drug Administration (FDA). Although there is evidence from tests on laboratory animals that cirmtuzumab can decrease the number of CLL cells, the investigators do not know if this will work in humans. Therefore, the goal of this study is to see if cirmtuzumab is safe and tolerable in study participants when given for a duration of 6 to 12 months.

Official Title

A Phase 1 Extension Study to Determine the Safety of UC-961 (Cirmtuzumab) at the Recommended Phase 2 Dose for Retreatment of Patients With Chronic Lymphocytic Leukemia Treated Previously With UC-961


This is an open-label extension study to determine the safety and efficacy. Patients enrolled in the initial phase 1 trial in CLL are eligible for enrollment in this extension trial.

UC-961 is administered by intravenous infusion every 14 days for 4 doses, then every 28 days for 4 doses, after which responses will be assessed. Patients with an objective response (meeting working group criteria for partial response or complete response) will continue at the same dose and schema. Patients with stable disease or progressive disease are eligible to increase the dose of UC-961 for another 6-month course.

Duration of UC-961 administration is until disease progression, treatment intolerance, or lack of clinical benefit.


Chronic Lymphocytic Leukemia CLL cancer UC-961 cirmtuzumab Leukemia Leukemia, Lymphoid Leukemia, Lymphocytic, Chronic, B-Cell


You can join if…

Open to people ages 18 years and up

  • Clinical and phenotypic verification of B cell CLL and measurable disease.Immunophenotyping of the leukemic cells (blood or marrow) must demonstrate a monoclonal (or light chain positive) B cell population with immunophenotype consistent with CLL (e.g., co-expressing CD19 and CD5).
  • Recovered from toxic effects attributed to UC-961 to grade 1 levels, or baseline.
  • Must have measurable disease, including one of the following:
  • absolute lymphocyte count greater than 5000/uL
  • lymphadenopathy greater than 1.5 cm in longest dimension
  • splenomegaly
  • bone marrow biopsy with residual CLL cells, or resultant bone marrow dysfunction
  • Women of childbearing potential must agree not to become pregnant for the duration of the study. Both men and women must agree to use a barrier method of contraception for the duration of the study and until 10 weeks after the final dose of UC-961.
  • Subjects must have an ECOG performance status of 0-2.
  • Adequate hematologic function
  • Adequate renal function
  • Adequate hepatic function
  • Adequate coagulation tests

You CAN'T join if...

  • Pregnant or breast-feeding women
  • Intervening therapy since completion of initial UC-961 dosing, but excluding the following:
  • Within 14 days, or 5 half-lives (if known), whichever is shorter, of UC-961 restart: small molecule kinase inhibitor (eg: ibrutinib, idelalisib, AVL-292,IPI-145);
  • Within 28 days of UC-961 restart: chemotherapy (e.g., purine analogues,alkylating agents), corticosteroids, radiation therapy, or participation in any other investigational drug treatment (besides UC-961);
  • Within 56 days UC-961 restart: previous UC-961 dosing;
  • Within 8 weeks of UC-961 restart: monoclonal antibody therapy directed against CLL (eg. rituximab, ofatumumab, obinutuzumab, alemtuzumab).
  • Current infection requiring parenteral antibiotics.
  • Active infection with HIV, HBV, or HCV.
  • Concurrent malignancy or prior malignancy within the previous 3 years (other than completely resected carcinoma in situ, prostate cancer, or localized non-melanoma skin cancer).
  • Known central nervous system (CNS) involvement by malignancy.
  • Untreated autoimmunity such as autoimmune hemolytic anemia, or immune thrombocytopenia.
  • Uncompensated hypothyroidism (defined as TSH greater than 2x upper limit of normal not treated with replacement hormone).
  • Presence of more than 55% pro-lymphocytes in peripheral blood. Patients with Richter's transformation are not excluded.
  • Insufficient recovery from surgical-related trauma or wound healing.
  • Impaired cardiac function.


  • UC San Diego Moores Cancer Center
    La Jolla California 92093 United States

Lead Scientist

  • Catriona Jamieson
    Dr. Jamieson specialized in myeloproliferative disorders (MPDs) and leukemia. Myeloproliferative neoplasms are a family of uncommon but not rare degenerative disorders in which the body overproduces blood cells.


in progress, not accepting new patients
Start Date
Completion Date
University of California, San Diego
Phase 1
Study Type
Last Updated