Phase 1/2 Dose Escalation Study in Patients With Relapsed or Refractory Waldenstrom's Macroglobulinemia


About this study

Recent reports have identified a specific oncogenic mutation L265P of the MYD88 gene in approximately 90% of the patients with Waldenström's macroglobulinemia. MYD88 is a key linker protein in the signaling pathway of Toll Like Receptors (TLRs) 7, 8, and 9, and IMO-8400 is an oligonucleotide specifically designed to inhibit TLRs 7,8, and 9. The scientific hypothesis for use of IMO-8400 to treat patients with Waldenström's macroglobulinemia depends on the inhibition of mutant MYD88 signaling in the TLR pathway, thereby interrupting the proliferation of cell populations responsible for the propagation of the disease.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria:

  1. Patients must have a diagnosis of Waldenstrom's Macroglobulinemia that has relapsed after a previous treatment or has shown partial or no response to previous treatment.
  2. At least 18 years of age.
  3. Agree to use contraception

Exclusion Criteria:

  1. Is nursing or pregnant
  2. Has body weight < 50 kg.
  3. Has BMI > 34.9 kg/m2.
  4. Has a positive test for human immunodeficiency virus (HIV-1 or -2) hepatitis C virus (HCV) or hepatitis B surface antigen (HBsAg).
  5. Receiving chronic systemic corticosteroid therapy > 20 mg of prednisone daily.
  6. Being treated with other anti-cancer therapies (approved or investigational).
  7. Has an active infection requiring systemic antibiotics.
  8. Has had surgery requiring general anesthesia within 4 weeks of starting the study.
  9. Has autoimmune cytopenia (anemia, thrombocytopenia, leukopenia).
  10. Has heart failure of Class III or IV.
  11. Has sensory or motor neuropathy limiting daily activities.

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status Contact

Rochester, Minn.

Mayo Clinic principal investigator

Stephen Ansell, M.D., Ph.D.

Closed for enrollment

Contact information:

Cancer Center Clinical Trials Referral Office


Jacksonville, Fla.

Mayo Clinic principal investigator

Asher Alban Chanan Khan, M.D.

Closed for enrollment

Contact information:

Cancer Center Clinical Trials Referral Office


More information


Publications are currently not available

Additional contact information

Cancer-related trials contact form

Phone: 855-776-0015 (toll-free)

International patient clinical studies questions