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NCT06831955RecruitingPhase 2

LifEStyle Intervention to Enhance Efficacy of Neoadjuvant Therapy in Patients With Triple Negative Breast Cancer

The LESLIE Trial: LifEStyle Intervention to Enhance Efficacy of Neoadjuvant Systemic Therapy in Patients With Triple Negative Breast Cancer

Source: ClinicalTrials.gov · Last updated 7 Aug 2026

Brief summary (registry, in English)

LESLIE is a multicentric randomized controlled trial in patients with triple negative breast cancer receiving neoadjuvant chemo/immunotherapy (NAT). This trial investigates the hypothesis that adding a cyclic fasting-mimicking diet combined with exercise during the NAT improves the NAT's therapeutic efficacy, treatment tolerability and compliance, as well as improve quality of life.

Status (registry)
Recruiting
Phase (registry)
Phase 2
Study type
Interventional
Enrollment
356 (estimated)
First submitted
5 Dec 2024
Start date
1 Feb 2026
Primary completion date
1 Sept 2028
Lead sponsor
Universitaire Ziekenhuizen KU Leuven
NCT number
NCT06831955

What you commit to

  • Study type: Interventional · Phase 2
  • Planned participants: 356
  • From 1 Feb 2026 to the primary completion date, 1 Sept 2028
  • 10 sites in 1 country
  • Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Prior treatment

  • had a treatment with any of the following:
    • any other chemotherapy, immunotherapy or anticancer agents within 5 years of the first dose of study treatment
    • injectable hypoglycemics 2. have not have recovered adequately from the toxicity and/or complications from a surgical intervention prior to starting therapy
  • prior systemic treatment for breast cancer or other malignancies within 5 years of treatment enrollment, except for adequately treated basal cell or squamous skin cancer or in situ cervical cancer. Other malignancies diagnosed more than 5 years before the diagnosis of breast cancer must have been radically treated without evidence of relapse at the moment of patient enrollment in the trial.
  • has a history of an additional malignancy that is progressing or that has required active treatment in the 5 years prior to breast cancer diagnosis. Exceptions include basal cell carcinoma of the skin or squamous cell carcinoma of the skin that has undergone potentially curative therapy or in situ cervical cancer
  • Prior treatment with anthracyclines
  • Prior therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent or with an agent directed to another co-inhibitory T-cell receptor (e.g., CTLA-4, OX-40, CD137)

Other illness

  • Has any disorder, which in the Investigator's opinion might jeopardize the participant's safety or compliance with the protocol
  • Has, as judged by the investigator, any evidence of severe or uncontrolled systemic diseases, including active bleeding diatheses, or active infection including hepatitis B, hepatitis C, and human immunodeficiency virus (HIV). Screening for chronic conditions is not required
  • Active autoimmune diseases requiring systemic treatments
  • Patients with type 1 diabetes mellitus
  • History of alcohol use disorder (DSM-5)
  • History of eating disorder (DSM-5)

Who the study is looking for

  • The patient has a biopsy-confirmed diagnosis of stage II-III TNBC
    • Patients with tumor stage T1cN1-2, T2N0-N2, T3N0-N2, T4N0-N2
    • ER and PR negative is defined as an absent or minimal (≤10%) expression of oestrogen and progesterone receptors and absence of HER2 protein over-expression per ASCO/CAP-guidelines
    • All histological subtypes are eligible, including but not limited to invasive breast cancer of no special type (NST) , invasive lobular carcinoma (ILC) etc
  • WHO/ECOG performance status of grade 0-1
  • The participant is able to perform a CPET test (cardiopulmonary exercise testing)
  • Body mass index ≥ 18.5 kg/m²
  • Pregnant or breastfeeding women
  • Presence of adequate bone marrow and organ function
  • HbA1c \<10%

Age in the registry: 18 years to - · Sex: All · Does not accept healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (10)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
Ziekenhuis Aan De Stroom
Coordinator of this site? Confirm its status
AntwerpBelgiumNot yet recruiting
UZ Antwerpen
Coordinator of this site? Confirm its status
AntwerpBelgiumRecruiting
Cliniques universitaires Saint-Luc - UCLouvain
Coordinator of this site? Confirm its status
BrusselsBelgiumRecruiting
UZ Brussel
Coordinator of this site? Confirm its status
BrusselsBelgiumRecruiting
UZ Gent
Coordinator of this site? Confirm its status
GhentBelgiumNot yet recruiting
Jessa Ziekenhuis Hasselt
Coordinator of this site? Confirm its status
HasseltBelgiumRecruiting
AZ Groeninge
Coordinator of this site? Confirm its status
KortrijkBelgiumRecruiting
University Hospital Leuven
Coordinator of this site? Confirm its status
LeuvenBelgiumRecruiting
Centre Hospitalier Universitaire (CHU) UCL Liège
Coordinator of this site? Confirm its status
LiègeBelgiumRecruiting
Centre Hospitalier Universitaire (CHU) UCL Namur
Coordinator of this site? Confirm its status
NamurBelgiumRecruiting

This page is information, not medical advice. Discuss any trial with your doctor.