University of Hertfordshire

Coxsackie virus entry and spread in HeLa cells is aided by microvesicle release

Research output: Contribution to conferencePoster

Documents

  • SA133P004

    Accepted author manuscript, 102 KB, PDF document

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Original languageEnglish
Publication statusPublished - 13 Sep 2012
EventMicrovesiculation and Disease, a Biochemical Society Focused Meeting: Microvesiculation and Disease - London Metropolitan University, London, United Kingdom
Duration: 13 Sep 201214 Sep 2012
https://www.biochemistry.org/Events/tabid/379/View/programme/MeetingNo/SA133/Default.aspx

Conference

ConferenceMicrovesiculation and Disease, a Biochemical Society Focused Meeting
CountryUnited Kingdom
CityLondon
Period13/09/1214/09/12
Internet address

Abstract

Microvesicles(MVs) released from plasma membrane expressing surface phosphatidylserine and ranging from 0.2-≤1 m in diameter are reported to carry various membrane proteins, lipids and cytoplasmic components characteristic of the parental cell (1). Coxsackievirus B (CVB), a member of the enterovirus family is the main cause of meningitis and encephalitis in infants which may result in neurodevelopmental defects. Calpains are calcium-dependant cysteine proteases that degrade cytoplasmic and cytoskeletal proteins. They regulate a variety of actin-dependant cellular processes such as microvesiculation.
CVB1 requires calpain activation for both entry and virus replication. Here, we show that knocking down calpain, using approaches such as small interfering RNA (siRNA), culminates in reduction of MV release, as we showed before with another intracellular pathogen, the protozoan parasite, Trypanosoma cruzi (2). The reduction in MV release then abrogates CVB1 entry and spread in HeLa cells. The calpain inhibitor calpeptin also caused similar reduction in CVB1 entry and spread to healthy target cells.
Together, our findings provide evidence that CVB1 infected HeLa cells enhance MV production, and these MVs aid the spread of infection. Furthermore, inhibition of MV release using siRNA results in inhibition of CVB1 entry and spread.

ID: 13382485