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Gut bacteria may shield nerves from chemo damage – a trial puts it to the test

NCT ID NCT07733817

What the study statuses mean

This study's is highlighted.

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 29, 2026 · Last updated Jul 31, 2026 · Updated 2 times

Summary

This phase III trial tests whether a daily probiotic supplement, OXXYSLAB®, can reduce peripheral neuropathy—nerve damage causing pain and numbness—in people with stage III colon cancer receiving oxaliplatin-based chemotherapy (FOLFOX or XELOX). About 130 participants will take either the probiotic or a placebo starting one week before their first chemo cycle and continuing until one week after the last. The study tracks how many develop moderate-to-severe nerve symptoms, aiming to see if a simple gut intervention can ease a common, debilitating side effect.

What this could mean

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

Active substance
a multi-strain probiotic supplement called OXXYSLAB®
What this could lead to
If effective, this probiotic could offer a simple, non-drug way to reduce painful nerve damage caused by chemotherapy, improving quality of life during colon cancer treatment.
What could go wrong
This is a relatively small phase III trial, and the effect may be modest or not clinically meaningful. Probiotics can also cause digestive side effects or interact with the gut microbiome in unpredictable ways.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 130 people

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

Expected to start

Oct 2026

An estimate. Start dates often move.

Expected to finish

Apr 2036

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.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * Patient ≥ 18 years * Patient with histologically confirmed stage III adenocarcinoma colon cancer with curative resection * Patient with an indication to start adjuvant oxaliplatin-based chemotherapy (FOLFOX 4 or XELOX regimen) * ECOG performance status score of 0 or 1 * Patient must consent to allow the collection of fecal and blood samples during study for further ancillary studies * Screening laboratory values must meet the following criteria: * Neutrophils ≥ 1500/ mm³; Platelets ≥ 100 000/ mm³; Hemoglobin ≥ 9.0 g/dL * Bilirubin ≤ 1.5 x ULN, AST and ALT ≤ 3 x ULN * Serum creatinine ≤ 1.5 x ULN or measured or calculated creatinine ≥ 50 ml/min clearance (CrCl) (using the Cockcroft-Gault formula) * Patient with French language comprehension * Female subject of childbearing potential must have a negative urine or serum pregnancy test within 7 days before study probiotics supplementation start * Patient in reproductive age must be willing to use adequate contraception during study probiotics supplementation * Patient affiliated to an appropriate social security system * Patient has signed informed consent obtained before to any study specific procedures Enclusion Criteria: * Patient with any distant metastasis * Patient with current peripheral neuropathy of any grade or ongoing treatment prescribed to prevent or treat peripheral neuropathy * Patient with hypersensitivity to any ingredients in the composition of the multi-strain formulation and/or maltose * Patient with history of acute pancreatitis * Patient seriously immunosuppressed * Patient with history of other malignancy within the previous 3 years (except for appropriately treated in-situ cervix carcinoma and non-melanoma skin carcinoma) * Patient using of probiotics or antibiotic treatments within one month before inclusion * Patient with chronic inflammatory gastro-intestinal disease * Patient with uracilemia ≥ 16 ng/ml * Patient with QT/QTc \> 450 msec for men and \> 470 msec for women * Patient with active infection requiring systemic therapy * Patient with personality disorder or any other known progressive psychiatric pathology * Patient with neurological previous history with ongoing symptoms (sequelae of head trauma, stroke, multiple sclerosis, epilepsy, neurodegenerative pathology, etc.) * Patient with dependence on alcohol and / or drugs * Pregnant or lactating woman * Simultaneous participation in another clinical study that may compromise the conduct of this study. * Patient assessed by the investigator to be unable or unwilling to comply with the requirements of the protocol * Patient deprived of liberty or placed under the authority of a tutor

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

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

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    7 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • CH

    Saint-Lô, France

  • CHU

    Caen, France

  • CHU

    Lille, France

  • CHU

    Rouen, France

  • Centre François Baclesse

    Caen, Centre François Baclesse, 14076, France

  • Centre Oscar Lambret

    Lille, France

  • Ch Aunay-Bayeux

    Bayeux, France

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