Browsing by Subject "neutralizing antibody"

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    Are human adenovirus-5 and 36 associated with obesity in children?
    (BMJ Publishing Group, 2014) Cakmakliogullari E.K.; Sanlidag T.; Ersoy B.; Akcali S.; Var A.; Cicek C.
    Objectives: The aims of this study were to determine the association between adenovirus-5- and adenovirus-36-specific antibodies and obesity in children and to investigate their relationship with serum lipid and leptin levels. Methods: A cross-sectional study was performed on a total of 120 children who were divided into subgroups according to body mass index percentile as obese (Q95th percentile) or nonobese (G95th percentile). The presence of adenovirus-36 and adenovirus-5-neutralizing antibodies was investigated by using the serum neutralization assay. Serum leptin levels were determined by microenzyme immonoassay; highdensity lipoprotein, low-density lipoprotein, triglyceride, and cholesterol levels were measured by chemiluminescence method. Results: The presence of adenovirus-5-specific antibodies was 28.3% and 6.6% in the obese children and in non-obese children, respectively (P = 0.02). The frequency of adenovirus-36-specific antibodies was significantly greater (P = 0.018) in the obese children (26.6%) than in the non-obese children (10.0%). Serum leptin level of the obese group were significantly higher than that of the non-obese group (P = 0.000). Conclusions: Our data support the association between obesity and the presence of specific antibodies to adenovirus-36 and adenovirus-5 in children. Our research has the feature of being the first national study to indicate the relationship between adenovirus-36 and human obesity as well as the first international study to indicate the relationship between adenovirus-5 and human obesity. Copyright © 2014 by The American Federation for Medical Research.
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    Evaluation of adjuvant activity of Astragaloside VII and its combination with different immunostimulating agents in Newcastle Disease vaccine
    (Academic Press, 2021) Yakubogullari N.; Coven F.O.; Cebi N.; Coven F.; Coven N.; Genc R.; Bedir E.; Nalbantsoy A.
    Astragaloside VII (AST-VII), a major cycloartane saponin isolated from Turkish Astragalus species, turned out to be one of the most active metabolites demonstrating Th1/Th2 balanced immune response. As Quillaja saponins are extensively used in adjuvant systems, this study made an attempt to improve AST-VII based adjuvant systems by using different immunostimulatory/delivery agents (monophosphoryllipid A (MPL), Astragalus polysaccharide (APS) and squalene) and to induce cellular and humoral immune response against a viral vaccine. For this purpose, Newcastle Disease vaccine (NDV) was chosen as a model vaccine. Swiss albino mice were immunized subcutaneously with LaSota vaccines in the presence/absence of AST-VII or developed adjuvant systems. AST-VII administration both in live/inactivated LaSota vaccines induced neutralizing and NDV specific IgG, IgG1 and IgG2b antibodies response as well as IL-2 and IL-4 production. APS based delivery systems enhanced the production of neutralizing antibody and the minor augmentation of IFN-γ and IL-2 levels. Squalene emulsion (SE) alone or combined with AST-VII were effective in NDV restimulated splenocyte proliferation. As a conclusion, AST-VII and AST-VII containing adjuvant systems demonstrated Th1/Th2 balanced antibody and cellular immune responses in NDV vaccines. Thus, these systems could be developed as vaccine adjuvants in viral vaccines as alternative to saponin-based adjuvants. © 2021 International Alliance for Biological Standardization