A Pilot Study of Anselamimab in Patients With AL Amyloidoma and Measurable Tissue Involvement

May 22, 2026 updated by: Stanford University

A Pilot Study of CAEL-101/Anselamimab in Patients With AL Amyloidoma and Measurable Tissue Involvement

This is an exploratory study to assess the binding of CAEL-101/anselamimab to amyloid in vivo, recruitment of inflammatory cells and reduction of the amyloid mass.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

5

Phase

  • Early Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • United States
    • California
      • Palo Alto, California, United States, 94305
        • Stanford University
        • Principal Investigator:
          • Michaela Liedtke, MD
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. AL amyloid deposit confirmed by biopsy and IHC or mass spectrometry
  2. Amyloid deposits are measurable by imaging (ultrasound or cross-sectional)
  3. 18 years or older
  4. ECOG performance status 0-3

  5. Adequate bone marrow reserve, hepatic and renal function as demonstrated by:

    1. Absolute neutrophil count ≥ 1.0 × 109/L
    2. Platelet count ≥ 75 × 109/L
    3. Hemoglobin ≥ 9 g/dL
    4. Total bilirubin ≤ 2 times the upper limit of normal (× ULN) unless due to Gilbert's syndrome.
    5. Aspartate aminotransferase (AST) ≤ 3 × ULN
    6. Alanine aminotransferase (ALT) ≤ 3 × ULN

  6. No evidence of cardiac, renal or hepatic involvement by amyloidosis

    1. Echocardiogram with mean wall thickness </= 12mm unless other cardiac cause
    2. 24 hour urine protein <500mg AND estimated glomerular filtration rate (eGFR) >50mL/min/1.73 sqm (Cockcroft-Gault formula)
    3. Alkaline phosphatase below upper limit of normal and total liver span </=15cm
  7. Participants of childbearing potential agree to use contraception throughout study an
  8. Ability to understand and willingness to provide written informed consent.

Exclusion Criteria:

  1. Use of other investigational agents within 30 days of screening
  2. Taking doxycycline within 30 days of screening
  3. Current significant cardiovascular, respiratory, hepatic, renal, gastrointestinal, endocrinological, hematological, or neurological disorders, or psychiatric disorder.
  4. Major surgery within 4 weeks of enrollment
  5. Pregnant
  6. Breast feeding
  7. Participant is eligible and agreeable to standard of care chemotherapy.
  8. Presence of active infection at the time of screening

  9. Participant with a monoclonal protein or isotypic light chain predominance (increased level of the involved light chain and abnormal free light chain ratio (<0.26 or >1.65)) ☐

    ☐

  10. Participant with known or suspected systemic AL amyloidosis, or suspicion of other organ involvement.
  11. Lymph node involvement
  12. Involvement of amyloidoma in more than one organ.
  13. AL amyloidoma involving other disease locations except those specified in the protocol
  14. Presence of solitary plasmacytoma
  15. Participant with clinically significant lung disorder or disease
  16. Not a candidate for definitive surgical treatment (i.e., complete resection) of amyloidoma.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Anselamimab
Participants will receive anselamimab (CAEL-101) 1000 mg/m² by IV infusion weekly for 4 infusions, then every 2 weeks thereafter for up to 48 weeks. Premedication for infusion reaction prophylaxis may be administered according to institutional standards.
Drug: Anselamimab

Patients will receive anselamimab administered by intravenous infusion. The dose will be 1000 mg/m² based on body surface area (BSA) calculated from height and weight obtained during screening. BSA will not be recalculated unless body weight changes by ≥20% from screening.

Study drug will be administered over approximately 2 hours. Participants will receive infusions every 7 (±1) days for the first 4 infusions, followed by every 14 (±2) days thereafter for a total treatment duration of 48 weeks. The maximum single dose is 2700 mg.

Participants will be monitored for infusion-related reactions and overall tolerability for approximately 90 minutes following completion of the first 4 infusions, or longer at the investigator's discretion.

Premedication with diphenhydramine (25-50 mg PO/IV), acetaminophen/paracetamol (325-650 mg PO/IV), and/or similar agents may be administered per institutional standards to reduce the risk of infusion-related reactions.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change From Baseline in Amyloid Target Lesion Size
Time Frame: Baseline through Week 72
Amyloid target lesion size will be assessed using RECIST v1.1 criteria. Measurements will be obtained at baseline and at Weeks 12, 24, 36, 48, and 72. The outcome will evaluate change from baseline in target lesion size.
Baseline through Week 72

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Stanford University

Investigators

  • Principal Investigator: Michaela Liedtke, MD, Stanford University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

July 1, 2026

Primary Completion (Estimated)

July 1, 2028

Study Completion (Estimated)

July 1, 2028

Study Registration Dates

First Submitted

May 22, 2026

First Submitted That Met QC Criteria

May 22, 2026

First Posted (Actual)

May 29, 2026

Study Record Updates

Last Update Posted (Actual)

May 29, 2026

Last Update Submitted That Met QC Criteria

May 22, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IRB-81617

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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