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  • Title: Role of anti-glycoproteins D (anti-gD) and K (anti-gK) IgGs in pathology of herpes stromal keratitis in humans.
    Author: Mott KR, Osorio Y, Maguen E, Nesburn AB, Wittek AE, Cai S, Chattopadhyay S, Ghiasi H.
    Journal: Invest Ophthalmol Vis Sci; 2007 May; 48(5):2185-93. PubMed ID: 17460278.
    Abstract:
    PURPOSE: To assess the relative impact of antibodies specific for HSV-1 glycoproteins on eye disease in response to HSV-1 infection, the composition of antibodies specific for 10 of the viral glycoproteins, and the effect of anti-glycoprotein (g)D and anti-gK antibodies on antibody-dependent enhancement (ADE). METHODS: In a prospective case-control study, sera from patients with a history of herpes stromal keratitis (HSK) were compared with sera from nonocular HSV-1-seropositive and HSV-seronegative control subjects. HSV-1 neutralizing antibody titer and type-specific IgG and IgM were measured. In addition, the presence of anti-HSV-1 gD and gK antibodies in the sera of all patients also was determined by ELISA using gD and gK antigens. Finally, the role of anti-gD- and gK-specific antibodies to ADE was investigated. RESULTS: Average neutralizing antibody titers and levels of HSV-1 IgG were similar between HSK- and non-HSK-seropositive patients. However, the contribution of gD to the neutralizing antibody titer in HSK sera was significantly lower than that in non-HSK-seropositive patients, despite higher anti-gD ELISA titers. Overall, sera from patients with HSK had higher anti-gK antibody titers and induced ADE in vitro compared with non-HSK or seronegative sera. The ADE response in HSK sera was attributed to anti-gK antibody. CONCLUSIONS: These results suggest that sera from HSK patients had higher anti-gD and -gK antibody titers than sera from seropositive patients who had no history of HSK despite similar levels of neutralizing antibody titers and HSV-1 IgG, that HSK sera induced ADE whereas sera from non-HSK patients did not induce ADE, and that anti-gD antibody in sera of HSK patients contributed less to the HSV-1 neutralization antibody titer than did sera from non-HSK patients.
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