Abstract:
:Melioidosis is a life-threatening infectious disease caused by the gram-negative bacillus Burkholderia pseudomallei. An effective vaccine is needed, but data on protective immune responses in human melioidosis are lacking. We used ELISA and an antibody-dependent cellular phagocytosis assay to identify the major features of protective antibodies in patients with acute melioidosis in Thailand. We found that high levels of B. pseudomallei-specific IgG2 are associated with protection against death in a multivariable logistic regression analysis adjusting for age, diabetes, renal disease, and neutrophil count. Serum from melioidosis survivors enhanced bacteria uptake into human monocytes expressing FcγRIIa-H/R131, an intermediate-affinity IgG2-receptor, compared with serum from nonsurvivors. We did not find this enhancement when using monocytes carrying the low IgG2-affinity FcγRIIa-R131 allele. The findings indicate the importance of IgG2 in protection against death in human melioidosis, a crucial finding for antibody-based therapeutics and vaccine development.
journal_name
Emerg Infect Disjournal_title
Emerging infectious diseasesauthors
Chaichana P,Jenjaroen K,Chumseng S,Sumonwiriya M,Rongkard P,Kronsteiner B,Teparrukkul P,Limmathurotsakul D,Day NPJ,Chantratita N,Dunachie SJdoi
10.3201/eid2702.200213subject
Has Abstractpub_date
2021-02-01 00:00:00pages
463-470issue
2eissn
1080-6040issn
1080-6059journal_volume
27pub_type
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