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Varicella-zoster Virus by Ann M. Arvin, Allison Abendroth, Jennifer F. Moffat (Paperback, 2012)

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ISBN-13: 9783642264665, 978-3642264665. Varicella-zoster Virus. 43 DonGilden,RandallJ. Cohrs,RaviMahalingam,andMariaA. Cohen SimianVaricellaVirus:MolecularVirology. 291 WayneL. Levin Contents ix PerspectivesonVaccinesAgainstVaricella-ZosterVirusInfections. 359 AnneA.

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Varicella-zostervirus(VZV)isamedicallyimportanthumanherpesvirus,belo- ingtothesubfamilyAlphaherpesviridae. Thecapacitytopersistinsensoryneurons isade?ningcharacteristicoftheAlphaherpesviridaesubgroupwhichalsoincludes herpessimplexvirus1and2;likeVZV,simianvaricellavirus(SVV),pseudorabies virus-1(PRV-1),andequineherpesvirus-1(EHV-1)belongtotheVaricellovirus genus. ThebasicelementsoftheinfectiouscycleofVZVinthehumanhostarethat infectionofthena?vehostresultsinvaricella,commonlyknownaschickenpox, latencyisestablishedinsensoryganglia,andreactivationcauseszosteror sh- gles. Therelationshipbetweenthecausative agentofvaricellaandzoster was demonstratedmorethan100yearsagowhenchildreninoculatedwithmaterialfrom zosterlesionswereshowntodevelopvaricella. Thelocalizeddistributionofthe zosterrashwasalsorecognizedasdemarcatingthedematomeinnervatedbyaxons fromneuronsineachofthesensoryganglia. Earlyelectronmicroscopystudies showedthatvirusparticleswerepresentinhighconcentrationsinthevesicular ?uidfrombothvaricellaandzosterlesions,andVZVwasamongthe?rstviruses propagatedinvitrobyJohnEndersandThomasWeller. Theintroductionofim- nosuppressivetherapiesformalignancyledtoobservationssuggestingtheneed forcell-mediatedimmunityinthehostresponsetovaricellaanditsroleinma- tainingVZVlatency. Fortunately,earlystudiesofthemolecularvirologyofVZV revealedthatitwasinhibitedbyinterferencewiththethymidinekinasegene,and thelife-threateningandoftenfatalVZVinfectionsexperiencedbythesepatients becametreatablewithantiviraldrugs. Subsequently,thecapacitytogrowVZVin tissueculturewasexploitedtocreatealiveattenuatedVZVvaccinebyMichiaki Tashihaki. Whilenowtakenforgranted,theseearlyinsightsaboutVZVandits characteristicsasahumanpathogenaswellasthedevelopmentofeffectivean- viral drugs and vaccines occurred over many decades. Importantly, these early observationssetthestagefortheremarkableprogressthathasbeenmadeinour understandingofthemolecularbiologyofVZV,thesubtletiesofitstropismfor differentiatedhumancells,includinglymphocytesaswellasskinandneurons,and themechanismsbywhichthevirusachievesanequilibriumwiththehostsothatit persistsnotjustintheindividualbutinthehumanpopulation. v vi Preface Thepurposeofthisvolumeistoreviewkeyareasofprogressinthe?eldofVZV research,aswellasworkontherelatedSVV,writtenbythosewhohavecontributed manyofthenew? ndingsthathaveenrichedourknowledgeoftheuniquech- acteristicsofthisubiquitoushumanpathogen. AlthoughtheVZVgenomeisthe smallestamongthehumanherpesviruses,therapidlyacceleratingpaceofdiscovery about VZV and VZV-host interactions re?ected in these reviews promises to continueasnewtoolsareavailableandnewhypothesesaregeneratedtoexplain howVZVhascreatedandmaintaineditsnicheinthehuman virome Therelationshipbetweenthecausative agentofvaricellaandzoster was demonstratedmorethan100yearsagowhenchildreninoculatedwithmaterialfrom zosterlesionswereshowntodevelopvaricella. Thelocalizeddistributionofthe zosterrashwasalsorecognizedasdemarcatingthedematomeinnervatedbyaxons fromneuronsineachofthesensoryganglia. Earlyelectronmicroscopystudies showedthatvirusparticleswerepresentinhighconcentrationsinthevesicular ?uidfrombothvaricellaandzosterlesions,andVZVwasamongthe?rstviruses propagatedinvitrobyJohnEndersandThomasWeller. Theintroductionofim- nosuppressivetherapiesformalignancyledtoobservationssuggestingtheneed forcell-mediatedimmunityinthehostresponsetovaricellaanditsroleinma- tainingVZVlatency. Fortunately,earlystudiesofthemolecularvirologyofVZV revealedthatitwasinhibitedbyinterferencewiththethymidinekinasegene,and thelife-threateningandoftenfatalVZVinfectionsexperiencedbythesepatients becametreatablewithantiviraldrugs. Subsequently,thecapacitytogrowVZVin tissueculturewasexploitedtocreatealiveattenuatedVZVvaccinebyMichiaki Tashihaki. Whilenowtakenforgranted,theseearlyinsightsaboutVZVandits characteristicsasahumanpathogenaswellasthedevelopmentofeffectivean- viral drugs and vaccines occurred over many decades. Importantly, these early observationssetthest