Inhibitory function of secretory leukocyte proteinase inhibitor (SLPI) in human saliva is HIV-1 specific and varies with virus tropism.

Abstract:

OBJECTIVE:Secretory leukocyte proteinase inhibitor (SLPI) is an endogenous mucosa associated protein that has been proposed to possess anti-human immunodeficiency virus type 1 (HIV-1) activity. The aim of this study was to investigate the biological function of SLPI in salivary mediated inhibition of HIV infection and in addition the inhibitory effect of SLPI using isolates of varied virus tropism. MATERIAL AND METHODS:The inhibitory effect of HIV-1 infection in vitro, mediated by 60 different saliva samples was analyzed with respect to levels of SLPI. Salivary samples depleted from IgA and SLPI, respectively, were further analyzed for anti-HIV activity. The antiviral effect of recombinant SLPI was investigated within an in vitro system of HIV-1 infection of target cells using a panel of viral isolates with distinct coreceptor usage. Furthermore we tested a panel of overlapping synthetic peptides, representing the amino acids in SLPI, for their capacity to inhibit HIV-1 infection of human peripheral blood mononuclear cells (PBMCs). RESULTS AND CONCLUSIONS:These experiments show that elevated levels of salivary SLPI can be associated with an increased inhibitory effect of the whole saliva sample, and that this inhibitory effect is decreased with broad coreceptor usage of the virus.

journal_name

Oral Dis

journal_title

Oral diseases

authors

Skott P,Lucht E,Ehnlund M,Björling E

doi

10.1034/j.1601-0825.2002.01807.x

subject

Has Abstract

pub_date

2002-05-01 00:00:00

pages

160-7

issue

3

eissn

1354-523X

issn

1601-0825

journal_volume

8

pub_type

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