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PolyMedix Receives U.S. Patent Protection for Licensed Computational Methods to Design Antimicrobial Polymers


Monday, September 28, 2009

Radnor, PA -- PolyMedix, Inc. (OTC BB: PYMX, http://polymedix.com), an emerging biotechnology company developing new therapeutic drug products to treat infectious diseases and acute cardiovascular disorders based on biomimetics, has received patent protection for certain exclusively licensed intellectual property by the issuance to the University of Pennsylvania of U.S. patent number 7,590,517, "Methods, Systems, and Computer Program Products for Computational Design of Amphiphilic Polymers."

This patent claims the underlying process and implementation of two proprietary computational methodologies: PACE™ (Proteomic Assisted Computational Engine) and GOLDYN™ (Global Optimization of Long-time Dynamics force field), useful for the de novo design of small molecule mimetics. It relates to the identification of stable conformations of polymers and polymer fragments (oligomers) by computing force fields for the target compounds, and then predicting their conformations using molecular dynamics and configurational-biased simulations. This methodology enables the design of small amphiphilic polymers or oligomers, taking into account backbone structures, side-chain architectures and solvent effects, and improves the likelihood of synthesizing compounds with desired properties.

These computational methods were used in the design of PolyMedix’s defensin mimetic antibiotic compounds, which represent a new class of antibiotic drugs and antimicrobial biomaterials that are believed to work in such a way that makes bacterial resistance unlikely to develop. PolyMedix’s lead defensin-mimetic antibiotic compound is PMX-30063, currently in Phase I clinical development. On December 10, 2008, PolyMedix announced the results of the first Phase I human clinical study with PMX-30063. The results of that study suggest that it should be possible to achieve clinically therapeutic levels with daily doses of PMX-30063 which are lower than those associated with any adverse effects seen in the single dose study. On May 15, 2009, PolyMedix announced that it had received regulatory clearance from Health Canada to initiate a second Phase I clinical study with PMX-30063. This Phase IB clinical study will assess the safety of PMX-30063 given repeatedly over a period of several days. The initial indication planned for PMX-30063 is as a treatment for pan-Staphylococcal infections, including MRSA (methicillin-resistant Staphylococcus aureus).

About PolyMedix, Inc.

PolyMedix is a publicly traded emerging biotechnology company focused on the development of novel drugs and biomaterials for the treatment of infectious diseases and acute cardiovascular disorders. PolyMedix’s compounds are based on biomimetics: non-peptide small molecule drug candidates that mimic the activity of proteins. The Company’s antibiotic compounds, including PMX-30063 – small molecule mimetics of human host-defense proteins – have a mechanism of action distinct from those of current antibiotic drugs, a mechanism which is intended to make bacterial resistance unlikely to develop. The Company’s goal is to develop these as rapidly acting antibiotics for serious systemic and local infections. The Company plans to continue the development of polymeric formulations as antimicrobial biomaterials, which can be used as additives to paints, plastics, and textiles to create self-sterilizing products and surfaces. The Company’s heptagonist compounds, including PMX-60056, reverse the activity of both heparin and Low Molecular Weight Heparins, with the goal of developing an antagonist drug for LMWHs, and that is safer and easier to use than currently approved therapy for heparin. For more information, please visit PolyMedix on its website at www.polymedix.com.

This press release contains forward-looking statements made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 that involve risks, uncertainties and assumptions that could cause PolyMedix’s actual results and experience to differ materially from anticipated results and expectations expressed in these forward looking statements. PolyMedix has in some cases identified forward-looking statements by using words such as "anticipates," "believes," "hopes," "estimates," "looks," "expects," "plans," "intends," "goal", "potential," "may," "suggest," and similar expressions. Among other factors that could cause actual results to differ materially from those expressed in forward-looking statements, PolyMedix’s compounds may not enter or successfully complete clinical testing, or be granted regulatory approval to be sold and marketed in the United States or elsewhere. A more complete description of these factors is included in PolyMedix’s filings with the Securities and Exchange Commission. You should not place undue reliance on any forward-looking statements. PolyMedix undertakes no obligation to release publicly the results of any revisions to any such forward-looking statements that may be made to reflect events or circumstances after the date of this press release or to reflect the occurrence of unanticipated events, except as required by applicable law or regulation.



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