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首页> 外文期刊>生物医学与环境科学（英文版） >Comparison of the Pathogenicity of Neisseria meningitidis Isolates of Hyperinvasive Sequence Type 7 Belonging to Serogroups A, B, C, and X
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Comparison of the Pathogenicity of Neisseria meningitidis Isolates of Hyperinvasive Sequence Type 7 Belonging to Serogroups A, B, C, and X

机译：属于血清组A，B，C和X的7型高侵袭性序列脑膜炎奈瑟菌分离株的致病性比较

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Objective To compare the pathogenicity of isolates of sequence type 7(ST-7)Neisseria meningitidis(N.meningitidis)belonging to four different serogroups(A,B,C,and X).Methods Four ST-7 N.meningitidis isolates serogrouped as A,B,C,and X and characterized by different capsule structures,were examined for their adhesion and invasion properties,and their ability to induce cytokine release and apoptosis in the host cell(the A549 cell line).Results Among the four ST-7 N.meningitidis isolates,the serogroup A isolate possessed the strongest adhesion and invasion ability.This isolate also induced the release of the highest levels of the proinflammatory mediators interleukin-6,interleukin-1β,and interferon,and the highest apoptosis rate in the host cells.However,there was no significant difference in interleukin-8 and tumor necrosis factor-αsecretion between the four isolates.Based on the findings,the serogroup X N.meningitidis isolate had the weakest pathogenicity,whereas there was almost no difference in the pathogenicity of the isolates from serogroups B and C.Conclusions The differences in the capsular structure of the four isolates of ST-7 N.meningitidis affected their pathogenic capacities.The findings also imply that the hyperinvasive ST-7 N.meningitidis lineage may include hypoinvasive isolates.

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