Use of Bioisosteric Replacement Tools to Obtain Mutation- Resistant Antivirals Mattia CF Prosperi...
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Transcript of Use of Bioisosteric Replacement Tools to Obtain Mutation- Resistant Antivirals Mattia CF Prosperi...
Use of Bioisosteric Replacement Tools to Obtain Mutation-Resistant Antivirals
Mattia CF Prosperi
University of “Roma TRE”
Faculty of Computer Science Engineering
Dept. of Computer Science and Automation (DIA)
via della vasca navale, 79 -00146- Roma
Outline• HIV-1 is a highly mutating
virus which is able to develop quickly resistance to antiretrovirals– Combined treatments (HAART)
are the current choice to lower the viral load to undetectable levels in the body
– Even if the patients’ expected survival time is increased, HIV-1 ultimately can develop cross-resistance
– HAARTs are harmful for the body due to toxicity
Aim
• Mutational pathways of HIV-1 can be explored with respect to natural evolution and under drug pressure– Phenotypic tests, naïve vs
treated population samples• New compounds can be
designed not only to be effective against wild type strains, but also against resistant population
Integration of Techniques• Viral Resistance to commercial Drugs
• Analyses on in-vitro phenotypic tests and Population sampling
• Derivation of different mutational sets
• Huge genomic data base • Los Alamos (more than 27,000
HIV-1 protease sequences)
• Molecular Modelling and Computer Aided Drug Design• HIV-1 protease 3D structure
modelling• Wild type sequences, Mutant
sequences• MOL and Modeller
• Molecular Interaction Fields• Scaffold Hopping
• GRID, SHOP
Results (preliminary)
• Two mutant structures of HIV-1 protease were considered– These structures were
exhibiting opposite phenotypic behaviour for two compounds (SQV and DRV)
• SHOP was able to suggest in both cases the replacement of fragments from one drug to another when considering the mutant structures