Role in Enhanced Transmission Defensins 5 and 6 Increase Hiv Infectivity: -induced Human Neisseria Gonorrhoeae

نویسندگان

  • Theresa L. Chang
  • Amanda Micsenyi
  • Gary A. Jarvis
  • Wuyuan Lu
  • Edith Porter
  • Mary E. Klotman
چکیده

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Neisseria gonorrhoeae-induced human defensins 5 and 6 increase HIV infectivity: role in enhanced transmission.

Sexually transmitted infections (STIs) increase the likelihood of HIV transmission. Defensins are part of the innate mucosal immune response to STIs and therefore we investigated their role in HIV infection. We found that human defensins 5 and 6 (HD5 and HD6) promoted HIV infection, and this effect was primarily during viral entry. Enhancement was seen with primary viral isolates in primary CD4...

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Anti-HIV Activity of Human Defensin 5 in Primary CD4+ T Cells under Serum-Deprived Conditions Is a Consequence of Defensin-Mediated Cytotoxicity

BACKGROUND We have previously shown that human defensin 5 (HD5) promotes HIV infectivity in both primary CD4+ T cells and HeLa cells expressing CD4 and CCR5. HD5 is induced in response to sexually transmitted infections (STIs) such as Chlamydia trachomatis and Neisseria gonorrhoeae, suggesting it plays a role in STI-mediated enhancement of HIV transmission. In contrast to our findings, a recent...

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Key Determinants of Human α-Defensin 5 and 6 for Enhancement of HIV Infectivity

Defensins are antimicrobial peptides important for mucosal innate immunity. They exhibit a broad spectrum of activity against bacteria, viruses, and fungi. Levels of α-defensins are elevated at the genital mucosa of individuals with sexually transmitted infections (STIs). Somewhat paradoxically, human α-defensin 5 and 6 (HD5 and HD6) promote human immunodeficiency virus (HIV) infectivity, and c...

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Neisseria gonorrhoeae enhances HIV-1 infection of primary resting CD4+ T cells through TLR2 activation.

Sexually transmitted infections increase the likelihood of HIV-1 transmission. We investigated the effect of Neisseria gonorrheae (gonococcus [GC]) exposure on HIV replication in primary resting CD4(+) T cells, a major HIV target cell during the early stage of sexual transmission of HIV. GC and TLR2 agonists, such as peptidylglycan (PGN), Pam(3)CSK(4), and Pam(3)C-Lip, a GC-derived synthetic li...

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Sialylation lessens the infectivity of Neisseria gonorrhoeae MS11mkC.

In a human challenge experiment, the infectivity of gonococci with sialylated lipooligosaccharide (LOS) was compared with the infectivity of gonococci with unsialylated LOS. Volunteers were intraurethrally inoculated with approximately 5000 sialylated or unsialylated piliated, non-opaque (P+Opa-, transparent) colony type gonococci, strain MS11mkC. Five (83%) of 6 volunteers inoculated with unsi...

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تاریخ انتشار 2008