Title:Advances in Computational Methods to Discover New NS2B-NS3 Inhibitors
Useful Against Dengue and Zika Viruses
Volume: 22
Issue: 29
Author(s): Igor José dos Santos Nascimento*, Érica Erlanny da Silva Rodrigues, Manuele Figueiredo da Silva, João Xavier de Araújo-Júnior and Ricardo Olimpio de Moura
Affiliation:
- Department of Pharmacy, Estácio of Alagoas College, Maceió, Brazil
- Department of Pharmacy, Cesmac University
Center, Maceió, Brazil
- Department of Pharmacy, Drug Development and Synthesis Laboratory, State University of
Paraíba, Campina Grande, Brazil
Keywords:
DENV, ZIKV, NS2B-NS3, CADD, Molecular modeling, Drug design.
Abstract: The Flaviviridae virus family consists of the genera Hepacivirus, Pestivirus, and Flavivirus,
with approximately 70 viral types that use arthropods as vectors. Among these diseases,
dengue (DENV) and zika virus (ZIKV) serotypes stand out, responsible for thousands of deaths
worldwide. Due to the significant increase in cases, the World Health Organization (WHO) declared
DENV a potential threat for 2019 due to being transmitted by infected travelers. Furthermore, ZIKV
also has a high rate of transmissibility, highlighted in the outbreak in 2015, generating consequences
such as Guillain-Barré syndrome and microcephaly. According to clinical outcomes, those infected
with DENV can be asymptomatic, and in other cases, it can be lethal. On the other hand,
ZIKV has severe neurological symptoms in newborn babies and adults. More serious symptoms include
microcephaly, brain calcifications, intrauterine growth restriction, and fetal death. Despite
these worrying data, no drug or vaccine is approved to treat these diseases. In the drug discovery
process, one of the targets explored against these diseases is the NS2B-NS3 complex, which presents
the catalytic triad His51, Asp75, and Ser135, with the function of cleaving polyproteins, with
specificity for basic amino acid residues, Lys- Arg, Arg-Arg, Arg-Lys or Gln-Arg. Since NS3 is
highly conserved in all DENV serotypes and plays a vital role in viral replication, this complex is an
excellent drug target. In recent years, computer-aided drug discovery (CADD) is increasingly essential
in drug discovery campaigns, making the process faster and more cost-effective, mainly explained
by discovering new drugs against DENV and ZIKV. Finally, the main advances in computational
methods applied to discover new compounds against these diseases will be presented here.
In fact, molecular dynamics simulations and virtual screening is the most explored approach,
providing several hit and lead compounds that can be used in further optimizations. In addition,
fragment-based drug design and quantum chemistry/molecular mechanics (QM/MM) provides new
insights for developing anti-DENV/ZIKV drugs. We hope that this review offers further helpful information
for researchers worldwide and stimulates the use of computational methods to find a
promising drug for treating DENV and ZIKV.