title: Nordihydroguaiaretic acid (NDGA) inhibits replication and viral morphogenesis of dengue virus.
abstract: Dengue is the most common mosquito borne viral disease in humans. The infection with any of the 4 dengue virus serotypes (DENV) can either be asymptomatic or manifest in two clinical forms, the mild dengue fever or the more severe dengue hemorrhagic fever that may progress into dengue shock syndrome. A DENV replicative cycle relies on host lipid metabolism; specifically, DENV infection modulates cholesterol and fatty acid synthesis, generating a lipid-enriched cellular environment necessary for viral replication. Thus, the aim of this work was to evaluate the anti-DENV effect of the Nordihydroguaiaretic acid (NDGA), a hypolipidemic agent with antioxidant and anti-inflammatory properties. A dose-dependent inhibition in viral yield and NS1 secretion was observed in supernatants of infected cells treated for 24 and 48 h with different concentrations of NDGA. To evaluate the effect of NDGA in DENV replication, a DENV4 replicon transfected Vero cells were treated with different concentrations of NDGA. NDGA treatment significantly reduced DENV replication, reiterating the importance of lipids in viral replication. NDGA treatment also led to reduction in number of lipid droplets (LDs), the neutral lipid storage organelles involved in DENV morphogenesis that are known to increase in number during DENV infection. Furthermore, NDGA treatment resulted in dissociation of the C protein from LDs. Overall our results suggest that NDGA inhibits DENV infection by targeting genome replication and viral assembly.
authors.affiliation: Departmento de Infectómica y Patogénesis molecular, CINVESTAV-IPN, México, D.F., Mexico.
authors.forename: Rubén
authors.initials: R
authors.lastname: Soto-Acosta
authors.affiliation: Departmento de Infectómica y Patogénesis molecular, CINVESTAV-IPN, México, D.F., Mexico.
authors.forename: Patricia
authors.initials: P
authors.lastname: Bautista-Carbajal
authors.affiliation: Department of Medicine, Division of Infectious Disease, University of California, San Diego, La Jolla, CA, United States.
authors.forename: Gulam H
authors.initials: GH
authors.lastname: Syed
authors.affiliation: Department of Medicine, Division of Infectious Disease, University of California, San Diego, La Jolla, CA, United States.
authors.forename: Aleem
authors.initials: A
authors.lastname: Siddiqui
authors.affiliation: Departmento de Infectómica y Patogénesis molecular, CINVESTAV-IPN, México, D.F., Mexico. Electronic address: rmangel@cinvestav.mx.
authors.forename: Rosa M
authors.initials: RM
authors.lastname: Del Angel
mesh_terms: D000818:Animals; D000998:Antiviral Agents / Q000494:pharmacology*; D002460:Cell Line; D004261:DNA Replication / Q000187:drug effects; D003715:Dengue / Q000188:drug therapy / Q000821:virology*; D003716:Dengue Virus / Q000187:drug effects* / Q000235:genetics / Q000254:growth & development / Q000502:physiology; D016679:Genome, Viral / Q000187:drug effects; D006801:Humans; D009637:Masoprocol / Q000494:pharmacology*; D014764:Viral Proteins / Q000235:genetics / Q000378:metabolism; D019065:Virus Assembly / Q000187:drug effects; D014779:Virus Replication / Q000187:drug effects*
chemical_list: D000998:Antiviral Agents; D014764:Viral Proteins; D009637:Masoprocol
keywords: Antiviral; Dengue; Morphogenesis; Replication