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Interaction of fibronectin with semen amyloids synergistically enhances HIV infection.


ABSTRACT: Semen harbors amyloids that enhance human immunodeficiency virus type 1 (HIV-1) infection. We set out to identify factors that bind these amyloids and to determine whether these factors modulate amyloid-mediated HIV-enhancing activity. Using biochemical and mass spectrometric approaches, we identified fibronectin as a consistent interaction partner. Although monomeric fibronectin did not enhance HIV infection, it synergistically increased the infectivity enhancement activity of the amyloids. Depletion of fibronectin decreased the enhancing activity of semen, suggesting that interfering with the binding interface between fibronectin and the amyloids could be an approach to developing a novel class of microbicides targeting the viral-enhancing activity of semen.

SUBMITTER: Roan NR 

PROVIDER: S-EPMC4168303 | biostudies-literature | 2014 Oct

REPOSITORIES: biostudies-literature

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Interaction of fibronectin with semen amyloids synergistically enhances HIV infection.

Roan Nadia R NR   Chu Simon S   Liu Haichuan H   Neidleman Jason J   Witkowska H Ewa HE   Greene Warner C WC  

The Journal of infectious diseases 20140408 7


Semen harbors amyloids that enhance human immunodeficiency virus type 1 (HIV-1) infection. We set out to identify factors that bind these amyloids and to determine whether these factors modulate amyloid-mediated HIV-enhancing activity. Using biochemical and mass spectrometric approaches, we identified fibronectin as a consistent interaction partner. Although monomeric fibronectin did not enhance HIV infection, it synergistically increased the infectivity enhancement activity of the amyloids. Dep  ...[more]

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