close Icon

Antibody and B-cell responses may control circulating lipopolysaccharide in patients with HIV infection.

Lim A, Amini A, D'Orsogna LJ, Rajasuriar R, Kramski M, Lewin SR, Purcell DF, Price P, French MA

  • Journal AIDS (London, England)

  • Published 14 Sep 2011

  • Volume 25

  • ISSUE 11

  • Pagination 1379-83

  • DOI 10.1097/QAD.0b013e328348a789


To examine the relationship between plasma markers of microbial translocation and antibodies to lipopolysaccharide (LPS) and circulating memory B cells in patients with HIV infection.

Cross-sectional study in antiretroviral therapy (ART)-naive (n = 23) and ART-treated (n = 27) HIV patients.

Antibodies to LPS and immunoglobulins, assayed in stored serum, and matched memory B-cell counts were correlated with levels of LPS and bacterial 16S ribosome DNA (16S rDNA), assayed in stored plasma.

In ART-naive patients, plasma LPS levels correlated inversely with serum levels of IgG and IgA antibodies to LPS (P = 0.03 and 0.006, respectively), serum levels of IgA anti-LPS correlated with total IgA (P < 0.0001) and levels of IgG anti-LPS correlated with IgM(+) memory B-cell counts (P = 0.025). In ART-treated patients, plasma LPS levels were not related to levels of LPS antibodies, but were related to CD4(+) T-cell and switched memory B-cell counts. There were no correlations with plasma levels of 16S rDNA.

Plasma LPS levels were associated with antibody and possibly B-cell responses to LPS in ART-naive HIV patients, whereas they were associated with the degree of immune reconstitution in ART-treated patients.