A Randomized Multicenter Phase II Trial Evaluating Oral Pooled Fecal Microbiotherapy (MaaT033) Concomitant to Cemiplimab (CB) Versus Best Investigator's Choice (BIC) in Resistance to PD-1/PD-L1 Blockade Due to Antibiotics (ATB) Uptake in Patients With Advanced Non-small Cell Lung Cancer (NSCLC)
The goal of IMMUNOLIFE2 is to overcome primary resistance to immune checkpoint inhibitors (ICIs), such as pembrolizumab or nivolumab used alone or in combination with chemotherapy, observed in patients with advanced non-small cell lung cancer (NSCLC) following antibiotic exposure, which induces intestinal dysbiosis. The reintroduction of immunotherapy with Cemiplimab, combined with oral pooled fecal microbiotherapy (MaaT033), aims to restore gut microbiota and potentially reverse resistance to ICIs. The main objective is to determine whether the combination of MaaT033 and Cemiplimab provides a superior disease control rate compared to the current best investigator's choice as comparator. Patients will be randomized to receive either: * Experimental arm: MaaT033 administered orally for one week prior to each cycle of Cemiplimab, which will be given in hospital care every 3 weeks for 6 months, followed by Cemiplimab alone thereafter; * Control arm: Best investigator's choice
• Participants who are at least 18 years of age on the day of signing informed consent,
• All participants must understand spoken and written national language,
• Histologically confirmed diagnosis of NSCLC (adenocarcinoma versus squamous cell carcinoma versus others)
• Have metastatic or unresectable NSCLC and considered by their physician to be indicated for a new line of immunotherapy.
• Have an Eastern Cooperative Oncology Group performance status (ECOG-PS) of 0 to 2. Evaluation of ECOG-PS is to be performed within 7 days prior to the date of treatment allocation.
• Patients who have progressed after immunotherapy or immunotherapy plus platinum-based chemotherapy (with platinum-based chemotherapy and ICI either sequentially or concomitantly).
• Have received ATB within 60 days before and 42 days after the first ICI administration and have progressed within 6 months after the first ICI.
• There are no restrictions on the number of prior lines of treatment. Patients may be included regardless of the number of previous therapies received.
• A male participant must abstain from heterosexual activity or must agree to use a contraception as detailed below (or in Appendix 2 of this protocol) during the treatment period and for at least 9 months after the last dose of CB or BIC and refrain from donating sperm during this period. (In application of the new recommendations of the CTFG)
⁃ A female participant is eligible to participate if she is not pregnant (see Appendix 2), not breastfeeding, and if at least one of the following conditions applies:
∙ Not a woman of childbearing potential (WOCBP) as defined in Appendix 2.
‣ A WOCBP should have a negative urine or serum pregnancy test within 72 hours prior to receiving the first dose of study medication. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required. A WOCBP must agree to follow the contraceptive guidance in Appendix 2 or abstain from heterosexual activity during the treatment period and for at least 180 days, after the last dose of treatment.
⁃ Patient should understand, sign, and date the written informed consent form prior to any protocol-specific procedures performed. Patient should be able and willing to comply with study visits and procedures as per protocol.
⁃ Patients must be affiliated to a social security system or beneficiary of the same
⁃ Have an estimated life expectancy greater than 3 months (from inclusion).
⁃ Meet acceptable steroid dose thresholds (i.e., not above the acceptable threshold \<10 mg prednisone daily or equivalent) if receiving systemic steroids at physiologic doses
⁃ Have measurable disease based on RECIST 1.1 criteria. Lesions situated in a previously irradiated area are considered measurable if progression has been demonstrated in such lesions.
⁃ Have adequate organ function as defined in the Table 1. All screening laboratory tests must be performed within 28 days prior to the start of study treatment.