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Characterization of serum antibodies from women immunized with Gardasil: A study of HPV-18 infection of primary human keratinocytes

HK. Wang, Q. Wei, Z. Moldoveanu, WK. Huh, HL. Vu, TR. Broker, J. Mestecky, LT. Chow,

. 2016 ; 34 (27) : 3171-3177. [pub] 20160423

Jazyk angličtina Země Nizozemsko

Typ dokumentu časopisecké články, Research Support, N.I.H., Extramural, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/bmc18017286
E-zdroje Online Plný text

NLK ProQuest Central od 2002-01-01 do Před 2 měsíci
Nursing & Allied Health Database (ProQuest) od 2002-01-01 do Před 2 měsíci
Health & Medicine (ProQuest) od 2002-01-01 do Před 2 měsíci
Family Health Database (ProQuest) od 2002-01-01 do Před 2 měsíci
Health Management Database (ProQuest) od 2002-01-01 do Před 2 měsíci
Public Health Database (ProQuest) od 2002-01-01 do Před 2 měsíci

Odkazy

PubMed 27113165
DOI 10.1016/j.vaccine.2016.04.038
Knihovny.cz E-zdroje

The prevalent human papillomaviruses (HPVs) infect human epithelial tissues. Infections by the mucosotropic HPV genotypes cause hyperproliferative ano-genital lesions. Persistent infections by high-risk (HR) HPVs such as HPV-16, HPV-18 and related types can progress to high grade intraepithelial neoplasias and cancers. Prophylactic HPV vaccines are based on DNA-free virus-like particles (VLPs) composed of the major capsid protein L1 of HPV-16, -18, -6 and -11 (Gardasil) or HPV-16 and -18 (Cervarix). Sera from vaccinated animals effectively prevent HPV pseudovirions to infect cell lines and mouse cervical epithelia. Both vaccines have proven to be highly protective in people. HPV pseudovirions are assembled in HEK293TT cells from matched L1 and L2 capsid proteins to encapsidate a reporter gene. Pseudovirions and genuine virions have structural differences and they infect cell lines or primary human keratinocytes (PHKs) with different efficiencies. In this study, we show that sera and isolated IgG from women immunized with Gardasil prevent authentic HPV-18 virions from infecting PHKs, whereas non-immune sera and purified IgG thereof are uniformly ineffective. Using early passage PHKs, neutralization is achieved only if immune sera are added within 2-4h of infection. We attribute the timing effect to a conformational change in HPV virions, thought to occur upon initial binding to heparan sulfate proteoglycans (HSPG) on the cell surface. This interpretation is consistent with the inability of immune IgG bound to or taken up by PHKs to neutralize the virus. Interestingly, the window of neutralization increases to 12-16h in slow growing, late passage PHKs, suggestive of altered cell surface molecules. In vivo, this window might be further lengthened by the time required to activate the normally quiescent basal cells to become susceptible to infection. Our observations help explain the high efficacy of HPV vaccines.

Citace poskytuje Crossref.org

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