Oxalate-Driven Host Responses in Kidney Stone Disease

Launched by UNIVERSITY OF ALABAMA AT BIRMINGHAM · Jun 8, 2022

Keywords

ClinConnect Summary

This clinical trial is studying how a substance called oxalate affects the development of kidney stones and the body's immune response. The researchers want to understand more about how this process works, so they are looking for both healthy participants and those who have calcium oxalate kidney stones. If you are between the ages of 18 and 60, not pregnant or breastfeeding, and meet other health criteria, you could be eligible to join the study.

Participants will participate for about three weeks, during which they will follow specific diets provided by the study team and provide blood and urine samples for testing. It’s important to note that participants will need to avoid certain supplements and vigorous exercise during the study. This research could help improve our understanding of kidney stones and potentially lead to better prevention and treatment options in the future.

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • Men and women between the ages of 18 and 60 years old.
• • Able to provide informed consent.
• • BMI between 20-30 kg/m2.
• • Non-tobacco users or not pregnant/breastfeeding/nursing.
• • Normal fasting blood comprehensive metabolic panel, complete blood count, C-reactive protein, and urinalysis. Must accurately collect two 24-hour urine collections within 20% of the appropriate ratio of creatinine (mg)/body weight (kg) for respective gender.
• • Healthy subjects: No history of CaOx KS or other medical conditions.
• • Patients with CaOx KS: Recent stone composition \> 50% CaOx; no uric acid, struvite, or carbonate apatite stone content. Must be first-time or recurrent CaOx stone former (last stone event ≤ 3 years).
• • Willing to not consume supplements (i.e. vitamins, Ca (citrate or carbonate) and other minerals, herbal supplements, nutritional aids, and probiotics) for 2 weeks before the study and during the study.
• • Willing to abstain from vigorous exercise during the study as this may compromise immune function.
• • Willing to consume diets provided only by the UAB CCTS Bionutrition Core. No food allergies or intolerance to any of the foods on the study menus.
• • Willing to accurately collect 24-hour urine samples, and to have blood drawn throughout the study.
• • If on medications for KS prevention (e.g. thiazides, citrate supplementation excluding calcium citrate), patients must be on a stable dose regimen for at least 8 weeks prior to and during screening, with no changes in dosing anticipated during the study. Patients should not take allopurinol for 2 weeks prior to screening since allopurinol has antioxidant properties.
• Exclusion Criteria:
• • Failure to meet the inclusion criteria or physician refusal.
• • Inability to sign and read the informed consent.
• • Any medical, psychiatric, or social conditions that would prohibit participants from abiding by the study requirements.
• • BMI ˃30 kg/m2 and \<20 kg/m2
• • Tobacco users or pregnant or breastfeeding/nursing women.
• • Abnormal fasting blood comprehensive metabolic panel, complete blood count, C-reactive protein, and urinalysis. Inaccurate 24-hour urine collections.
• • Healthy subjects: Currently taking or have recently taken medications within the last 3 months (i.e. antibiotics) or dietary supplements. History of KS or any medical condition that could influence absorption or excretion of oxalate.
• • Active illness including COVID-19, flu, common cold, fever, diarrhea, urinary tract infections, or other infections 14 days before the study and throughout the study.