European Journal Of Medicinal Chemistry Template
Abstract
Abstract
Aedes aegypti is
responsible to the transmission of Dengue, Chikungunya and Zika virus in
tropical and subtropical countries around the globe.
In absence of vaccines or antivirals for human treatment, most control
strategies are targeted to A. aegypti elimination.
In the search for new compounds for mosquito control, α-aminonitriles,
girgensohnine analogues were synthesized, these molecules showed inhibit acetylcholinesterase
enzyme over insect’s vectors of diseases. However, α-aminonitriles AChE
inhibition may not be the only mechanism of action of these molecules on
insects. The aim of this work was to elucidate others α-aminonitriles targets
as enzyme complexes of the mitochondrial electron-transport chain, the
antioxidant activity to catalase and superoxide dismutase (SOD) on A. aegypti. Mitochondria were isolated from A. aegypti, stored in 2 mL eppendorf
tubes at -70 °C and fragmented using ultrasound for 10 min. Complexes of
mitochondrial electron-transport chain, antioxidant activity to catalase and
superoxide dismutase (SOD) using concentrations 8nM, 2 μM, 8 μM and 40 μM of the
four compounds with the highest insecticide activity were evaluated. Results
indicated that analogs caused significant inhibition of enzyme activity between
12 and 44% on the complex I (NADH dehydrogenase) and oxidase succinate from 20 to
44% in the electron transport chain. The succinate dehydrogenase activity
increased from 65 to 162%, as the values of cytochrome c oxidase which varied
from 28 to 106%. It was found that the compounds caused inhibition of the
catalase, preventing the reduction of H2O2 that can
induce the formation of EROS. The compounds tested showed effect on complex I
by blocking the release of electrons, promoting and encouraging the formation
of EROS in the mitochondria.