Generation of mucosal anti-human immunodeficiency virus type 1 T-cell responses by recombinant Mycobacterium smegmatis

Jae Sung Yu, James W. Peacock, Stacie Vanleeuwen, Tsungda Hsu, William R. Jacobs, Mark J. Cayabyab, Norman L. Letvin, Richard Frothingham, Herman F. Staats, Hua Xin Liao, Barton F. Haynes

Research output: Contribution to journalArticle

19 Scopus citations


A successful vaccine vector for human immunodeficiency virus type 1 (HIV-1) should induce anti-HIV-1 immune responses at mucosal sites. We have generated recombinant Mycobacterium smegmatis vectors that express the HIV-1 group M consensus envelope protein (Env) as a surface, intracellular, or secreted protein and have tested them in animals for induction of both anti-HIV-1 T-cell and antibody responses. Recombinant M. smegmatis engineered for expression of secreted protein induced optimal T-cell gamma interferon enzymelinked immunospot assay responses to HIV-1 envelope in the spleen, female reproductive tract, and lungs. Unlike with the induction of T-cell responses, priming and boosting with recombinant M. smegmatis did not induce anti-HIV-1 envelope antibody responses, due primarily to insufficient protein expression of the insert. However, immunization with recombinant M. smegmatis expressing HIV-1 Env was able to prime for an HIV-1 Env protein boost for the induction of anti-HIV-1 antibody responses.

Original languageEnglish (US)
Pages (from-to)1204-1211
Number of pages8
JournalClinical and Vaccine Immunology
Issue number11
Publication statusPublished - Nov 1 2006


ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Clinical Biochemistry
  • Microbiology (medical)

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