Topline Data Readout Expected in Q2 2022

Phase 1 Clinical Program Intended to Support Development of SYN-020 for Multiple Indications

Including Celiac Disease, Non-Alcoholic Fatty Liver Disease, Age-Related Metabolic and Inflammatory Diseases, and Radiation Enteropathy

ROCKVILLE, MD, USA I October 21, 2021 I Synthetic Biologics, Inc. (NYSE American: SYN), a diversified clinical-stage company leveraging the microbiome to develop therapeutics designed to prevent and treat gastrointestinal (GI) diseases in areas of high unmet need, today announced that enrollment has commenced and eight study participants were dosed in the Company’s Phase 1, placebo-controlled, multiple-ascending dose (MAD) clinical study of SYN-020 intestinal alkaline phosphatase (IAP).

SYN-020 is a recombinant bovine IAP formulated for oral delivery to the small intestine. The published literature indicates that IAP functions to diminish intestinal inflammation, tighten the gut barrier to diminish “leaky gut,” and promote a healthy microbiome. Despite its broad therapeutic potential, a key hurdle to commercialization has been the high cost of IAP manufacturing. Synthetic Biologics has overcome this hurdle and has the ability to produce SYN-020 at a scale and cost viable for clinical and commercial development as an oral product.

“We are excited to announce the initiation of the Phase 1 multiple-ascending dose clinical study, which is an important milestone in furthering the clinical development of SYN-020 for multiple potential indications,” said Steven A. Shallcross, Chief Executive Officer and Chief Financial Officer. “SYN-020 is a promising, versatile program that we believe has enormous potential to help address a considerable need for innovative new therapies targeting disorders that stem from immune and inflammatory damage to the intestine, including celiac disease, non-alcoholic fatty liver disease (NAFLD), age-related metabolic and inflammatory diseases, and radiation enteropathy. We believe SYN-020 addresses a significant unmet market need as the total prevalent cases of celiac disease are expected to reach 4.3 million in 2023 in the U.S. alone. We look forward to announcing topline results from this study during the second quarter of 2022.”

The ongoing Phase 1 placebo-controlled clinical study is intended to evaluate the safety, tolerability and biodistribution of SYN-020 upon repeated dosing in up to 32 healthy adult volunteers. The study will be divided into four sequential cohorts of eight participants, with SYN-020 (5 mg, 15, mg, 45 mg or 75 mg) given orally twice daily for 14 days. A safety review will be conducted at the end of each cohort to determine whether progression to the next higher dose cohort is permissible. A topline data readout from this clinical study is anticipated during the second quarter of 2022, pandemic conditions permitting. A previously completed Phase 1 single-ascending dose (SAD) clinical study of SYN-020 enrolled 24 healthy adult volunteers into four cohorts with SYN-020 given orally as a single dose ranging from 5 mg to 150 mg. Analyses of preliminary data demonstrated that SYN-020 maintained a favorable safety profile, was well tolerated at all dose levels, and no adverse events were attributed to study drug. No serious adverse events were reported.

About Synthetic Biologics, Inc.

Synthetic Biologics, Inc. (NYSE American: SYN) is a diversified clinical-stage company leveraging the microbiome to develop therapeutics designed to prevent and treat gastrointestinal (GI) diseases in areas of high unmet need. The Company’s lead candidates are: (1) SYN-004 (ribaxamase) which is designed to degrade certain commonly used intravenous (IV) beta-lactam antibiotics within the gastrointestinal (GI) tract to prevent (a) microbiome damage, (b) Clostridioides difficile infection (CDI), (c) overgrowth of pathogenic organisms, (d) the emergence of antimicrobial resistance (AMR), and (e) acute graft-versus-host-disease (aGVHD) in allogeneic hematopoietic cell transplant (HCT) recipients, and (2) SYN-020, a recombinant oral formulation of the enzyme intestinal alkaline phosphatase (IAP) produced under cGMP conditions and intended to treat both local GI and systemic diseases. For more information, please visit Synthetic Biologics’ website at     

SOURCE: Synthetic Biologics