Gut bacteria may shield nerves from chemo damage – a trial puts it to the test
NCT ID NCT07733817
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
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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
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About 130 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Oct 2026
An estimate. Start dates often move.
- Expected to finish
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Apr 2036
An estimate. End dates often move.
- Lead sponsor
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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
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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.
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The places running it
7 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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CH
Saint-Lô, France
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CHU
Caen, France
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CHU
Lille, France
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CHU
Rouen, France
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Centre François Baclesse
Caen, Centre François Baclesse, 14076, France
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Centre Oscar Lambret
Lille, France
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Ch Aunay-Bayeux
Bayeux, France
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- Can zapping two brain regions at once quiet chronic nerve pain?