简介：ToexploretheantiviraleffectandmechanismofpolysaccharidefromSpirulinaplatensis(PSP)onherpessimplexvimstype2(HSV-2),astandardstrainofHSV-2(333strain)wasusedtoinvestigatetheantiviraleffectofPSPinvitro.PSPinvariousconcentrationswasappliedtodifferentstagesofHSV-2replicationcycle.Finally,thevirusinfectivity(TCID50),cytopathiceffect(CPE),andMTTstainingmethodforviablecells(MTTassay)wereusedasmarkerstoevaluatetheeffectofPSPonHSV-2.ThequantityofHSV-DNAwasdetectedbyreal-timefluorescencequantitativePCR(FQ-PCR).TheHSV-2infectedVerocellultrastructureswereobservedbytransmissionelectronmicroscopy(TEM).TheresultsshowedthatPSPhadlittlecytotoxiceffectonVerocells,itcouldnotdirectlyinactivateHSV-2infectivity.PSPnotonlyinterferedinadsorptionofHSV-2toVerocellsbutalsoinllibitedHSV-2biosynthesisinthecells.FQ-PCRresultsshowedthattheinhibitoryrateonHSV-DNAalsoincreasedinadose-dependentandtime-dependentmanner.TEMalsoconfirmedthatPSPexhibitedpronouncedinhibitoryeffectonHSV-2.Inconclusion,theantiviraleffectofPSPonHSV-2maybeattributedtotheinhibitionofvimsadsorption,vimsreplicationandsynthesisincells.

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