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Increased IgG but normal IgA anti-pneumococcal protein antibodies in lung of HIV-infected adults

Collins, Andrea ORCID:, Batrawy, Sherouk El, Gordon, Stephen ORCID: and Ferreira, Daniela ORCID: (2013) 'Increased IgG but normal IgA anti-pneumococcal protein antibodies in lung of HIV-infected adults'. Vaccine, Vol 31, Issue 35, pp. 3469-3472.

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PspA and pneumolysin (Ply) are important protein vaccine candidates. HIV infection is associated with increased susceptibility to pneumococcal pneumonia and concomitantly high pneumococcal carriage rates. Pneumococcal exposure is immunizing at the mucosa in healthy adults and so we wished to determine if the increased pneumococcal exposure in HIV-infected adults would be associated with altered pneumococcal specific antibody responses. We measured serum and bronchoalveolar lavage (BAL) fluid immunoglobulin (Ig)G and IgA to PspA and Ply in HIV-infected and healthy age-matched adults.

Naturally generated anti-Ply and anti-PspA IgG levels but not IgA were significantly increased in HIV-infected subjects in BAL independent of the hyperglobulinaemia commonly associated with HIV. There was therefore no evidence of a defect in mucosal responses to pneumococcal protein antigens among HIV-infected adults.

With regard to future vaccination strategies, simply increasing mucosal anti-pneumococcal protein Ig levels, without addressing functional protective response, is not likely to be effective in preventing pneumococcal pneumonia in HIV-infected individuals.

Item Type: Article
Subjects: QW Microbiology and Immunology > Antigens and Antibodies. Toxins and Antitoxins > QW 575 Antibodies
WC Communicable Diseases > Infection. Bacterial Infections > Bacterial Infections > WC 217 Pneumococcal infections
WC Communicable Diseases > Virus Diseases > Acquired Immunodeficiency Syndrome. HIV Infections > WC 503 Acquired immunodeficiency syndrome. HIV infections
WF Respiratory System > WF 140 Diseases of the respiratory system (General)
Faculty: Department: Clinical Sciences & International Health > Clinical Sciences Department
Digital Object Identifer (DOI):
Depositing User: Martin Chapman
Date Deposited: 04 Mar 2014 16:27
Last Modified: 05 Nov 2019 14:56


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