Saturday, August 23, 2014 2:15:33 PM
Epub 2013 Feb 18.
Shoemaker CJ1, Schornberg KL, Delos SE, Scully C, Pajouhesh H, Olinger GG, Johansen LM, White JM.
Author information
1Departmentof Cell Biology, University of Virginia, Charlottesville, Virginia, United States of America.
Erratum in
PLoS One. 2013;8(10). doi:10.1371/annotation/76780c06-ac81-48a3-8cce-509da6858fe5.
Abstract
Ebola virus (EBOV) is an enveloped RNA virus that causes hemorrhagic fever in humans and non-human primates. Infection requires internalization from the cell surface and trafficking to a late endocytic compartment, where viral fusion occurs, providing a conduit for the viral genome to enter the cytoplasm and initiate replication. In a concurrent study, we identified clomiphene as a potent inhibitor of EBOV entry. Here, we screened eleven inhibitors that target the same biosynthetic pathway as clomiphene. From this screen we identified six compounds, including U18666A, that block EBOV infection (IC(50) 1.6 to 8.0 µM) at a late stage of entry. Intriguingly, all six are cationic amphiphiles that share additional chemical features. U18666A induces phenotypes, including cholesterol accumulation in endosomes, associated with defects in Niemann-Pick C1 protein (NPC1), a late endosomal and lysosomal protein required for EBOV entry. We tested and found that all six EBOV entry inhibitors from our screen induced cholesterol accumulation. We further showed that higher concentrations of cationic amphiphiles are required to inhibit EBOV entry into cells that overexpress NPC1 than parental cells, supporting the contention that they inhibit EBOV entry in an NPC1-dependent manner. A previously reported inhibitor, compound 3.47, inhibits EBOV entry by blocking binding of the EBOV glycoprotein to NPC1. None of the cationic amphiphiles tested had this effect. Hence, multiple cationic amphiphiles (including several FDA approved agents) inhibit EBOV entry in an NPC1-dependent fashion, but by a mechanism distinct from that of compound 3.47. Our findings suggest that there are minimally two ways of perturbing NPC1-dependent pathways that can block EBOV entry, increasing the attractiveness of NPC1 as an anti-filoviral therapeutic target.
http://www.ncbi.nlm.nih.gov/pubmed/23441171?dopt=Abstract
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3575416/
Recent NNVC News
- NanoViricides Reports that the Phase I NV-387 Clinical Trial is Completed Successfully and Data Lock is Expected Soon • InvestorsHub NewsWire • 05/02/2024 02:07:42 PM
- Form 8-K - Current report • Edgar (US Regulatory) • 02/16/2024 09:53:32 PM
- Form 10-Q - Quarterly report [Sections 13 or 15(d)] • Edgar (US Regulatory) • 02/14/2024 09:55:35 PM
- Form 8-K - Current report • Edgar (US Regulatory) • 01/19/2024 09:44:48 PM
- Form DEF 14A - Other definitive proxy statements • Edgar (US Regulatory) • 12/04/2023 09:08:49 PM
- Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405] • Edgar (US Regulatory) • 10/13/2023 08:30:41 PM
- Form NT 10-K - Notification of inability to timely file Form 10-K 405, 10-K, 10-KSB 405, 10-KSB, 10-KT, or 10-KT405 • Edgar (US Regulatory) • 09/28/2023 08:44:54 PM
- Form 8-K - Current report • Edgar (US Regulatory) • 09/01/2023 08:46:45 PM
- Clinical Trial of Broad-Spectrum Antiviral Drug NV-CoV-2 is Progressing Well, Says NanoViricides - NV-CoV-2 is Positioned to Fulfill Many Unmet Medical Needs • InvestorsHub NewsWire • 07/06/2023 03:16:37 PM
FEATURED POET Announces Design Win and Collaboration with Foxconn Interconnect Technology for High-speed AI Systems • May 14, 2024 10:09 AM
FEATURED Element79 Gold Corp Reports Exceptionally High-Grade Results from Lucero • May 14, 2024 7:00 AM
VAYK Added New Manager for Expansion into $64 Billion Domestic Short-term Rental Market • VAYK • May 14, 2024 9:00 AM
Avant Technologies Equipping AI-Managed Data Center with High Performance Computing Systems • AVAI • May 10, 2024 8:00 AM
VAYK Discloses Strategic Conversation on Potential Acquisition of $4 Million Home Service Business • VAYK • May 9, 2024 9:00 AM
Bantec's Howco Awarded $4.19 Million Dollar U.S. Department of Defense Contract • BANT • May 8, 2024 10:00 AM