MaaT Pharma Announces the Initiation of a Phase 2a Investigator-Sponsored Clinical Trial Evaluating MaaT013 in Combination with Immune Checkpoint Inhibitors for Patients with Melanoma

Date : April 7, 2022

MaaT Pharma Announces the Initiation of a Phase 2a Investigator-Sponsored Clinical Trial Evaluating MaaT013 in Combination with Immune Checkpoint Inhibitors for Patients with Melanoma

Lyon, France, April 7, 2022, 6:00pm CET – MaaT Pharma (EURONEXT: MAAT – the “Company”), a French clinical-stage biotech and a pioneer in the development of microbiome-based ecosystem therapies dedicated to improving survival outcomes for patients with cancer, announced today the initiation of a Phase 2a clinical trial[1] sponsored by AP-HP[2], evaluating MaaT013, MaaT Pharma’s lead Microbiome Ecosystem Therapy candidate, in combination with immune checkpoint inhibitors (ICI), ipilimumab (Yervoy®) and nivolumab (Opdivo®), which are standard first line treatments for patients with metastatic melanoma.

The Phase 2a clinical trial is coordinated by Professor Franck Carbonnel, MD, Professor of Gastroenterology at the Kremlin-Bicêtre Hospital in Villejuif, France, and is being carried out in collaboration with INRAE[3] and Institut Gustave Roussy. The trial is a randomized, placebo-controlled study and is expected to enroll 60 patients in France. The primary endpoint is safety, while the secondary endpoint will evaluate MaaT013’s potential to improve the response to ICI therapies, as a consequence of MaaT013’s impact on the patient’s gut microbiome. Patients will be randomized to receive either MaaT013 in combination with both ICIs or a placebo with both ICIs. MaaT Pharma will provide MaaT013 drug candidate and the placebo for this study as well as perform the microbiome profiling of patients using its proprietary gutPrint® platform. This clinical trial is registered on clinicaltrials.gov.

Several studies have suggested that gut microbiota diversity and richness are predictors of response to ICI treatment[4] in patients with solid tumors. Notably, in two recent studies conducted in melanoma patients[5], fecal microbiota transfer from ICI therapy responders could overcome resistance to that same therapy in non-responders.

[1] NCT04988841: Prospective randomIzed clinical trial assessing the tolerance and clinical benefit of feCAl tranSplantation in patientS with melanOma treated with CTLA-4 and PD1 inhibitors.
[2] AP-HP: Assistance Publique – Hôpitaux de Paris
[3] INRAE: Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
[4] Routy B. et al, Science 2018, Matson et al, Science 2018, Gopalakrishnan V. et al, Science, 2018
[5] Davar D. et al, Science, 2021 ; Baruch E.N. et al, Science, 2021

About MaaT013

MaaT013 is a full-ecosystem, off-the-shelf, standardized, pooled-donor, Microbiome Ecosystem Therapy. It is characterized by a consistently high diversity and richness of microbial species and the presence of ButycoreTM (group of bacterial species known to produce anti-inflammatory metabolites). MaaT013 aims to restore the symbiotic relationship between the patient’s functional gut microbiome and their immune system to correct the responsiveness and tolerance of immune functions and thus reduce steroid-resistant, gastrointestinal-predominant aGvHD. MaaT013 has been granted Orphan Drug Designation by the US Food and Drug Administration (FDA) and the European Medicines Agency (EMA) for acute Graft-versus-Host Disease (aGvHD) and is currently being evaluated in a Phase 3 clinical trial. MaaT Pharma has obtained positive safety and efficiency clinical data for 76 patients with aGvHD (Phase 2 clinical trial and Early Access Program in France).

About MaaT Pharma

MaaT Pharma, a clinical stage biotechnology company, has established a complete approach to restoring patient-microbiome symbiosis in oncology. Committed to treating cancer and graft-versus-host disease (GvHD), a serious complication of allogeneic stem cell transplantation, MaaT Pharma has launched, in March 2022, a Phase 3 clinical trial for patients with acute GvHD, following the achievement of its proof of concept in a Phase 2 trial. Its powerful discovery and analysis platform, gutPrint®, supports the development and expansion of its pipeline by determining novel disease targets, evaluating drug candidates, and identifying biomarkers for microbiome-related conditions.

The company’s Microbiome Ecosystem Therapies are produced through a standardized cGMP manufacturing and quality control process to safely deliver the full diversity of the microbiome, in liquid and oral formulations. MaaT Pharma benefits from the commitment of world-leading scientists and established relationships with regulators to support the integration of the use of microbiome therapies in clinical practice.

MaaT Pharma is listed on Euronext Paris (ticker: MAAT).

Forward-looking Statements

All statements other than statements of historical fact included in this press release about future events are subject to (i) change without notice and (ii) factors beyond the Company’s control. These statements may include, without limitation, any statements preceded by, followed by or including words such as “target,” “believe,” “expect,” “aim,” “intend,” “may,” “anticipate,” “estimate,” “plan,” “project,” “will,” “can have,” “likely,” “should,” “would,” “could” and other words and terms of similar meaning or the negative thereof. Forward-looking statements are subject to inherent risks and uncertainties beyond the Company’s control that could cause the Company’s actual results or performance to be materially different from the expected results or performance expressed or implied by such forward-looking statements.

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Acting Chief Scientific Officer

Sheri Simmons

Sheri Simmons, Ph.D., is Acting Chief Scientific Officer at MaaT Pharma. Sheri brings extensive experience in biotechnology, particularly in the microbiome field, having held scientific leadership positions at Seres Therapeutics, Johnson & Johnson’s Microbiome Solutions team, and most recently at Seed Health, a leading probiotics company. In her role, she strengthens the Company’s scientific leadership, overseeing preclinical research, AI/data initiatives, and supporting efforts toward the Marketing Authorization Application of Xervyteg® in aGvHD.

Sheri holds a PhD in Biological Oceanography from the Massachusetts Institute of Technology (MIT) and completed an A.B. in Ecology & Evolutionary Biology at Princeton University, graduating summa cum laude and as a Phi Beta Kappa member, receiving one of six awards for the best senior thesis in the sciences. Sheri holds a PhD in Biological Oceanography from the Massachusetts Institute of Technology (MIT) and completed an A.B. in Ecology & Evolutionary Biology at Princeton University, graduating summa cum laude and as a Phi Beta Kappa member, receiving one of six awards for the best senior thesis in the sciences.

CEO and co-founder

Hervé Affagard

Hervé Affagard is the CEO and co-founder of MaaT Pharma. For the past 15 years, Hervé has been an intra/entrepreneur in the healthcare industry, after starting his career in IT in the steel industry. In late 2014, Hervé co-founded the company alongside Dr. Joël Doré, author of nearly 500 publications, and
one of the world’s most cited authors in the microbiome sphere today, after a professional career that spanned multiple industries. Hervé has led MaaT Pharma’s development from its early concept in 2013 and has been at the forefront of the development of the microbiome healthcare ecosystem in France and Europe. In January 2022, Hervé has been elected President of Allliance Promotion Microbiote, an organization founded in 2021 to support the microbiome sector development in France.

Engineer, MBA