Determining Normal Range for Free Light Chains in Serum Among Twins

January 10, 2025 updated by: University of California, San Francisco

Normal Range Study for Free Light Chains in Blood Among Identical or Fraternal Twins

The objective of this study is to recruit healthy adult identical and fraternal twins for the collection of one teaspoon of blood to be sent to the Clinical Lab at San Francisco General Hospital. The serum will be tested to determine the reference range for free light chains.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Serum free light chains are used to assist in the diagnosis of multiple myeloma. The test measures kappa (K) and lambda (L) chains, and the calculation of the ratio of kappa to lambda (K/L). Previous studies have shown that the K/L ratio does not change over time (1 year). The hypothesis of this study is that healthy twins will have a K/L ratio that are close to each other in value, suggesting that this ratio is genetically linked.

Study Type

Interventional

Enrollment (Actual)

32

Phase

  • Not Applicable

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
    • California
      • San Francisco, California, United States, 94306
        • San Francisco General Hospital

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

18 years to 80 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Healthy subjects 18-80 years.
  • Must be an identical or fraternal twin (both must be recruited)

Exclusion Criteria:

  • Symptoms suggestive of multiple myeloma (e.g., renal insufficiency, anemia, bone pain) -

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

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Healthy twin
Free light chains of twins compared to non-twin siblings
Other: Free light chains
Blood samples will be collected and analyzed

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Free light chain reference range
Time Frame: One month after the completion of the enrollment
Determination of the normal range for free light chains
One month after the completion of the enrollment

Collaborators and Investigators

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

Sponsor

University of California, San Francisco

Investigators

  • Principal Investigator: Alan Wu, PhD, University of California, San Francisco

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.

General Publications

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)

August 15, 2018

Primary Completion (Actual)

January 1, 2024

Study Completion (Actual)

January 1, 2024

Study Registration Dates

First Submitted

December 5, 2019

First Submitted That Met QC Criteria

December 5, 2019

First Posted (Actual)

December 9, 2019

Study Record Updates

Last Update Posted (Actual)

March 25, 2025

Last Update Submitted That Met QC Criteria

January 10, 2025

Last Verified

January 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 18-25508

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Participants and other researchers will not have access to data.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

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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