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Gut bacteria may explain why kidney stones strike in summer

NCT ID NCT07043374

Knowledge-focused Sponsor: Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This study will compare gut bacteria and blood markers between 270 kidney stone patients and healthy people in Shanghai. Researchers want to see if hot, humid weather changes gut microbes and tryptophan metabolism in ways that promote stone formation. No treatment is given; the goal is to understand the underlying mechanisms.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this could point toward ways to prevent kidney stones by modifying gut bacteria or diet, especially in hot climates.
What could go wrong
This is an observational study, not a treatment trial. It will not test any therapy, and results may not lead to direct clinical changes.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 270 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

Dec 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Case group: Patients diagnosed with kidney stones Control group: Healthy volunteers without kidney stones

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Inclusion criteria for patients with kidney stones * Age\>=18 years; * Diagnosed with kidney stones by ultrasound, CT or urography; * Willing to provide stool samples and serum samples for study; * No history of antimicrobial use in the past 3 months; * Signed and dated informed consent indicating that the patient or his/her legal representative is fully informed of the study-related information and agrees to participate. * Inclusion criteria for the healthy control group * Age\>=18 years; * No history of kidney stones and family history; * Imaging examination (such as abdominal ultrasound) showed no kidney stones; * Willing to provide stool samples and serum samples for research; * No history of antibiotic use in the past 3 months; * Signed and dated informed consent indicating that the volunteer is fully informed about the study-related information and agrees to participate. Exclusion Criteria: * Use of antimicrobials or probiotics within the past 3 months; * Presence of active urinary tract infection; * Presence of other serious systemic diseases, such as hepatic or renal insufficiency, cardiac or pulmonary diseases, malignant tumors, and immunodeficiency states; * Congenital urinary tract abnormalities; * Previous history of kidney transplantation or urinary diversion surgery; * Pregnant or lactating women; * Presence of chronic intestinal diseases, such as inflammatory bowel disease, irritable bowel syndrome, etc.; * Inability to provide samples or complete follow-up according to the research protocol; * Participation in other clinical studies within the past 3 months; * Other conditions deemed unsuitable for participation in this study by the researcher.

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Conditions

The condition(s) this trial relates to.

Kidney Calculi nephrolithiasis Ureteral Calculi ureterolithiasis

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Kidney calculi Ureteral calculi

How to take part

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  1. The official record

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