SOURCE: Pieris Pharmaceuticals, Inc.

Pieris Pharmaceuticals, Inc.

September 15, 2015 08:30 ET

Pieris Pharmaceuticals' Collaborator Presents Promising Preclinical Data on Tetraspecific Infectious Disease Anticalin Program at ASM Conference

First-in-Class Multispecific Protein Offers High Differentiation Over Antibodies

BOSTON, MA--(Marketwired - September 15, 2015) - Pieris Pharmaceuticals, Inc. (NASDAQ: PIRS), a biotechnology company advancing novel biotherapeutics through its proprietary Anticalin® technology platform, announced today that one of its partners, Sanofi, presented preclinical data on the companies' multispecifics program at an infectious disease conference. The tetraspecific Anticalin-based protein comprises four distinct Anticalin proteins, each specific for one of four different families of siderophores from Pseudomonas aeruginosa, collectively engaging twenty targets with high affinity and specificity.

The data presented September 10, 2015 at the American Society for Microbiology (ASM) Conference on Pseudomonas in Washington, DC, by Dr. Carsten Corvey, Global Sanofi Project leader, provided an overview of the drug-like properties of this complex protein, as well as promising in vivo activity in a chronic Pseudomonas aeruginosa infection animal model. The data demonstrate that the individual Anticalin polypeptides of the tetraspecific construct specifically bind to their respective targets in the low to sub nM range, achieving the desired efficacy in vitro and in a chronic infection rat model, in addition to exhibiting desired manufacturability and stability criteria.

Dr. Laurent Fraisse, Vice President Infectious Diseases, Sanofi R&D, commented, "Anticalins are optimally suited for addressing several targets with a multispecific protein and have shown great promise to address infectious diseases, in particular. We look forward to further advancing this program into IND-enabling studies."

Pieris President and CEO, Stephen Yoder, commented, "Our tetraspecific Anticalin program with Sanofi is one of the best examples of how our proprietary protein drug class is highly differentiated over antibody approaches. The benefits of engaging multiple targets with a single protein under one IND could be numerous and, in this case, has the potential to address a huge unmet need in patients suffering from Pseudomonas infections."

About Pieris Pharmaceuticals:
Pieris is a clinical-stage biotechnology company advancing its proprietary Anticalin® technology to create differentiated drugs that have the potential to be safer and more effective than conventional approaches. Anticalins show promise in addressing high-unmet medical needs and expanding the potential of targeted therapeutics. The company currently has a diverse proprietary pipeline and has ongoing R&D collaborations with Daiichi Sankyo, the Sanofi Group, Zydus Cadila, Stelis Biopharma and Allergan. Anticalin®, Anticalins® are registered trademarks of Pieris. For more information visit

About the Pieris-Sanofi infectious disease program:
Under a collaboration and license agreement Pieris has used its proprietary Anticalin® technologies to identify drug candidates against certain targets, with further development and commercialization activities to be conducted by Sanofi. The partnered Pieris-Sanofi infectious disease program is a tetraspecific Anticalin-based protein that engages several bacterial siderophores from Pseudomonas aeruginosa as therapeutic targets. Bacterial infections depend on available iron levels, and bacteria such as Pseudomonas use siderophores for iron scavenging. The siderophores of Pseudomonas encompass three different classes of pyoverdins, each class comprising three different members, and pyochelin, altogether defining ten distinct targets. As the Anticalins in this program bind to these siderophores in an iron-bound and -- unbound state, the multispecific Anticalin protein effectively engages twenty targets. Pseudomonas is the most common pathogen isolated from patients who have been hospitalized longer than one week and is a frequent cause of nosocomial infections.

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