Conference focuses on potential new drugs for malaria, leishmaniasis, and trypanosomiasis
A meeting in Colorado, USA has brought together chemists, biologists, pharmacologists, and clinicians in an attempt accelerate the discovery of new drugs for diseases caused by protozoan parasites. These include some of the major infectious diseases of poverty – malaria, leishmaniasis, human African trypanosomiasis and Chagas’ disease.
The organizers of the meeting, “Drug Discovery for Protozoan Parasites” held 22-26 March, point out that recent years have seen the welcome development of public-private research partnerships focused on diseases caused by protozoa – in most cases on malaria. However, these partnerships have mainly been concerned with translational research. As a result, several drugs have been advanced into clinical evaluation but, in the meantime, development of several apparently promising new drugs has not proved successful, “…thus leaving a sparse pipeline of new chemical entities that have potential for registration in the next few years”.
The objectives of the meeting were to discuss current methods to identify and validate new drug targets and to screen libraries of compounds to discover novel chemotypes; assess the potential for chemical biology and medicinal chemistry to optimize compounds that are specific and avoid resistance mechanisms; and identify critical paths for compound progression and to discuss the utility of key models for assessing preclinical drug leads.
Key problems addressed included identification and validation of new targets, chemical biology and medicinal chemistry approaches to characterize new compounds, novel screening techniques to identify new chemotypes, mechanisms of drug resistance, and cutting edge strategies to progress new drug candidates into clinical trials.
Several potentially important findings were reported. To give just one example, oral administration of an amphotericin B formulation, iCo-009, has been shown to have significant efficacy with no evidence of toxicity in mice infected with Leishmania donovani. Manufacturers iCo Therapeutics Inc, claim that “iCo-009 has overcome amphotericin B’s significant physicochemical barriers to absorption and holds promise for the development of a self-administered oral therapy for the treatment of visceral leishmaniasis”.
The meeting was supported by the Bill & Melinda Gates Foundation.
