Heterozygous Individuals for AGXT and Kidney Stones

July 16, 2026 updated by: Kyle D. Wood, University of Alabama at Birmingham
This study seeks to examine the effects of a heterozygous mutation of the AGXT gene in a stone forming population on endogenous oxalate production. Participants will consume a controlled low-oxalate diet and provide blood and urine samples to measure the amount of oxalate in their bodies.

Study Overview

Status

Enrolling by invitation

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

4

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
    • Alabama
      • Birmingham, Alabama, United States, 35233
        • University of Alabama at Birmingham

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 and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • at least 18 years of age
  • history of calcium oxalate stones
  • heterozygous mutation of the AGXT gene, as evidenced by results from the Invitae Nephrolithiasis Panel
  • willingness to comply with a controlled diet for five days

Exclusion Criteria:

  • pregnant individuals
  • individuals who are currently breast feeding

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

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Controlled Dietary Study
Participants will consume the controlled diet for five days. Participants will provide urine and blood samples to measure oxalate levels.
Other: Controlled Diet
Participants will consume a controlled low oxalate diet for five days.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Urinary Oxalate Excretion
Time Frame: Baseline through Day 4
Urinary oxalate excretion from urine samples will be measured as mg/day
Baseline through Day 4

Collaborators and Investigators

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

Sponsor

University of Alabama at Birmingham

Investigators

  • Principal Investigator: Kyle Wood, MD, University of Alabama at Birmingham

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, 2027

Primary Completion (Estimated)

August 1, 2031

Study Completion (Estimated)

August 1, 2032

Study Registration Dates

First Submitted

June 10, 2020

First Submitted That Met QC Criteria

June 10, 2020

First Posted (Actual)

June 12, 2020

Study Record Updates

Last Update Posted (Actual)

July 20, 2026

Last Update Submitted That Met QC Criteria

July 16, 2026

Last Verified

July 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IRB-300005327

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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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