EV 035

Addressing the threat of bad bugs

Compound summary

EV-035 is a novel bacterial type II topoisomerase inhibitor, belonging to the chemical class of 2-pyridones. EV-035 shows excellent broad-spectrum activity, including pathogens such as Staphylococcus, Streptococcus, Enterococcus, Escherichia, Pseudomonas, Acinetobacter and Haemophilus. Most importantly, EV-035 shows activity not only on drug-sensitive strains, but also on those resistant to marketed antibiotics (including quinolones) and has a very low propensity of developing new resistance. EV-035 has a very favourable in vitro safety profile and its pharmacokinetic properties allow for intravenous as well as oral dosing. The spectrum of EV-035 also extends to potential biothreat agents such as Burkholderia pseudomallei, Burkholderia mallei, Yersinia pestis, Bacillus anthracis, Francisella tularensis and Brucella abortus, work which was part-funded by the US Department of Defense. Evolva owns all rights to EV-035 and has patent applications covering this portfolio.

The medical need, and the market potential

The current antibiotic market generates sales of around USD 42 billion. Beta-lactams, quinolones and macrolides are the top-selling products.

Marketed antibiotics are increasingly losing their power and new antibacterial agents are urgently needed to close this widening gap in medical practice. Particularly, multidrug-resistance among potentially lifethreatening pathogens calls for discovery and development of novel products and novel classes of antibiotics for both hospitalacquired and community-acquired bacterial infections. However, large pharma companies have been curtailing or eliminating anti-bacterial research over the last two decades, leading to a drastic shrinkage of the development pipeline for new antibiotics.


In 2011 Evolva continued SAR (Structure-Activity Relationship) work around the EV- 035 series in order to select the final lead compound. More than 120 analogs were tested against a large panel of bacterial pathogens, including multidrug-resistant strains. Superior activity over reference antibiotics was observed in vitro, in particular against a large collection of quinolone-resistant strains. Spontaneous resistance experiments showed a very low rate of resistant mutants with amino acid changes in a different site than the classical quinolone site.

In early in vivo infection models, EV-035 showed an efficacy comparable or better than gold standard drugs against both Gram-positive and Gram-negative strains, including E. coli and MRSA as well as other multidrug-resistant pathogens. The final selected lead compound has good oral bio-availability and exhibits a favourable safety profile. Data generated to date indicate that EV-035 is an excellent candidate for further characterization and promotion as broad-spectrum, first-line antibiotic in the hospital as well as the community.

In the first half of 2012, further biochemical and microbiological profiling of the selected lead compound confirmed its broad range of activity on multidrug-resistant pathogens, in combination with excellent tolerability. In September 2012, the compound was presented at ICAAC in San Francisco, the world’s leading conference on antimicrobial agents and infectious diseases.

In September 2013, the US Defense Threat Reduction Agency (DTRA) announced selecting Evolva to enter into contract negotiations regarding possible preclinical funding for GC-072 (the lead compound in the EV-035 series) under the Transformational Medical Technologies Initiative (TMTI). The contract negotiations are expected to be concluded during 2014. The size of the award could be up to around USD 16 million.

Evolva continues to pursue options to partner the EV-035 series.

Scientific Presentation

Safe drugs for bad bugs; EV-035, a new topoisomerase inhibitor

Poster ICAAC 2012 F-2030 EV-035: Novel 2-pyridone based topoisomerase inhibitors with broad-spectrum activity against MDR pathogens, including quinolone resistance

Poster ICAAC 2012 F-2031 EV-035: Synthesis and in vitro antibacterial activity of a new series of 2-pyridone based topoisomerase inhibitors

Poster ICAAC 2012 F-2032 EV-035: in vitro ADMET, mouse PK and efficacy in murine infection models of a new orally available class of antibiotics

Poster ICAAC 2012 F-2033 EV-035: Potent antibiotic series against biothreat agent Burkholderia pseudomallei

Presentation ICAAC 2012 EV-035: 2-Pyridone-based Topoisomerase Inhibitors

Contact Information

Evolva SA
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CH-4153 Reinach
Tel: +41 61 485 2000
Fax: +41 61 485 2001
Evolva A/S
Lersoe Parkallé 42-44
DK-2100 Copenhagen OE
Tel: +45 35 200 230
Fax: +45 35 200 231
Evolva Biotech Private Limited
401 - 405, 4th Floor
Ticel Bio Park Ltd
Taramani Road, Taramani
Chennai 600 113
Tamil Nadu, India
Tel: +91 44 4297 1050
Fax: +91 44 4297 1060
Evolva, Inc. (Evolva USA)
2440 Embarcadero Way
Palo Alto
CA 94303
Tel: +1 650 856 2436
Fax: +1 650 856 7950

General Enquiries: info@evolva.com • Business Enquiries: busdev@evolva.com • India Enquiries: info_india@evolva.com