کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2403090 1102883 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The immunogenicity of pneumococcal polysaccharides in infants and children: A meta-regression
موضوعات مرتبط
علوم زیستی و بیوفناوری ایمنی شناسی و میکروب شناسی ایمونولوژی
پیش نمایش صفحه اول مقاله
The immunogenicity of pneumococcal polysaccharides in infants and children: A meta-regression
چکیده انگلیسی

The immunogenicity of plain (not conjugated) pneumococcal polysaccharides in children and infants was reviewed using a systematic literature search. Immunogenicity was defined as the fold-increase in serotype specific antibody concentration after a single dose of plain polysaccharide vaccine in unprimed subjects. Meta-regression was used to calculate the influence of study treatments including subject age, sampling time, dosage, immunization route, vaccine composition and study location. Immunogenicity increased with age for all serotypes, and the increase was more rapid in the first 11 months of life. Study location was the next most significant study variable, with higher responses in countries with lower GDP. A flat dose–response curve was observed over a range from 5 to 50 μg polysaccharide. Serotypes 6A, 6B, 14, 19F and 23F were significantly less immunogenic than serotypes 2, 3, 4, 7F, 8, 9N, 9V and 18C in 11 month old children, but continued to increase in immunogenicity with age until reaching similar levels at 6 years. Some proposed T-independent immune mechanisms could explain the differences in serotype immunogenicity.


► The immunogenicity of plain (unconjugated) pneumococcal polysaccharides has matured for many serotypes by 11 months of age.
► The immunogenicity of plain (unconjugated) pneumococcal polysaccharides is higher in countries with a lower GDP.
► At 11 months of age serotypes 6A, 6B, 14, 19F and 23F are significantly less immunogenic than serotypes 2, 3, 4, 7F, 8, 9N, 9V and 18C.
► Two immune mechanisms, complement C3 modification and T-independent regulation, give predictions consistent with the differences in serotype immunogenicity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vaccine - Volume 29, Issue 40, 16 September 2011, Pages 6838–6847
نویسندگان
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