Viral Infection or IFN-α Alters Mitotic Spindle Orientation by Modulating Pericentrin Levels.
iScience 2019;
12:270-279. [PMID:
30716700 PMCID:
PMC6360249 DOI:
10.1016/j.isci.2019.01.025]
[Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 11/01/2018] [Accepted: 01/15/2019] [Indexed: 12/19/2022] Open
Abstract
Congenital microcephaly occurs in utero during Zika virus (ZIKV) infection. The single-gene disorder, Majewski osteodysplastic primordial dwarfism type II (MOPDII), also leads to microcephaly and is concomitant with a decrease in the centrosomal protein, pericentrin (PCNT). This protein is a known contributor of mitotic spindle misorientation and ultimately, microcephaly. Similar to MOPDII, either viral infection or interferon (IFN)-α exposure reduced PCNT levels at the mitotic spindle poles. We unexpectedly found that infection of cells with any one of a diverse set of viruses, such as ZIKV, dengue virus, cytomegalovirus, influenza A virus, or hepatitis B virus, or treatment of cells with the anti-viral cytokine, IFN-α, produced mitotic spindle misorientation. These findings demonstrate a related mechanism for the development of microcephaly in viral infection, the host's antiviral IFN response, and primordial dwarfism.
ZIKV infection resembles MOPDII depletion of the centrosomal protein PCNT
Viral infection of mitotic cells results in loss of PCNT and spindle misorientation
IFN-α exposure to mitotic cells causes spindle misorientation
Loss of IFNAR abrogates both viral and IFN-α-induced spindle misorientation
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