Hematopoiesis in MBL and CLL Versus Healthy Age-Matched Control Subjects

March 26, 2026 updated by: Mayo Clinic

Hematopoiesis in Monoclonal B Cell Lymphocytosis (MBL) and B-Chronic Lymphocytic Leukemia (CLL) Versus Healthy Age-Matched Control Subjects

This study evaluates hematopoiesis to determine how MBL/CLL affected bone marrow responds to fight off infections in the body.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

PRIMARY OBJECTIVES:

I. Determine the cellular and mechanistic basis of bone marrow (BM) hematopoietic dysfunction in untreated MBL and CLL patients.

II. Determine if MBL and CLL B cell derived cellular products directly alter the differentiation and functional capacities of Hematopoietic Stem and Progenitor Cells (HSPCs).

III. Utilize the Emu-Tcl1 transgenic mouse model to determine how MBL and CLL patient-derived cellular products alter BM hematopoiesis.

OUTLINE: This is an observational study.

Patients undergo blood sample collection and bone marrow aspiration and biopsy and have their medical records reviewed on study.

Study Type

Observational

Enrollment (Estimated)

50

Contacts and Locations

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

Study Locations

  • United States
    • Minnesota
      • Rochester, Minnesota, United States, 55905
        • Recruiting
        • Mayo Clinic in Rochester
        • Contact:
        • Principal Investigator:
          • Neil E. Kay, M.D.

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

Yes

Sampling Method

Non-Probability Sample

Study Population

Patients with MBL, patients with CLL ,and healthy subjects recruited through Mayo Clinic.

Description

Inclusion Criteria:

  • Subjects in the CLL cohort who are eligible for these studies will have a clinically established diagnosis of CLL as assessed by flow cytometry and will include subjects who

    • Remain untreated
    • Are currently being treated
    • Who have already been treated
  • Subjects in the MBL cohort will have a clinically established diagnosis of MBL
  • Healthy age-matched control subjects
  • Healthy younger control subjects aged > 40 years

Exclusion Criteria:

  • Anyone under 40
  • Healthy control subjects must not have a diagnosis of CLL or MBL

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

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Observational
Patients undergo blood sample collection and bone marrow aspiration and biopsy and have their medical records reviewed on study.
Other: Non-Interventional Study
Non-interventional study

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Effects of MBL on bone marrow function
Time Frame: Baseline
Samples collected from healthy participants and participants with MBL will be compared for differences in bone marrow function (i.e., ability to fight off infection). Results will be descriptive. With participant permission, samples will be stored for future research use.
Baseline
Effects of CLL on bone marrow function
Time Frame: Baseline
Samples collected from healthy participants and participants with CLL will be compared for differences in bone marrow function (i.e., ability to fight off infection). Results will be descriptive. With participant permission, samples will be stored for future research use.
Baseline

Collaborators and Investigators

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

Sponsor

Mayo Clinic

Investigators

  • Principal Investigator: Neil E. Kay, M.D., Mayo Clinic in Rochester

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

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 (Actual)

November 18, 2016

Primary Completion (Estimated)

November 18, 2028

Study Completion (Estimated)

November 18, 2028

Study Registration Dates

First Submitted

July 31, 2024

First Submitted That Met QC Criteria

July 31, 2024

First Posted (Actual)

August 5, 2024

Study Record Updates

Last Update Posted (Actual)

March 31, 2026

Last Update Submitted That Met QC Criteria

March 26, 2026

Last Verified

March 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 16-006204 (Mayo Clinic in Rochester)
  • NCI-2024-00996 (Registry Identifier: CTRP (Clinical Trial Reporting Program))

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

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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