Can salivary activity predict periodontal breakdown in A. actinomycetemcomitans infected adolescents?

Abstract:

OBJECTIVE:While Aggregatibacter actinomycetemcomitans (Aa) is highly associated with localised aggressive periodontitis (LAP) many Aa-carriers do not develop LAP. This study was designed to determine whether specific salivary factors could distinguish between subjects who have Aa initially and remain healthy (H/AA) as compared to those who develop LAP (LAP/AA). DESIGN:H/AA subjects and healthy controls with no Aa (H) were enrolled in a longitudinal cohort study to investigate initiation of bone loss (LAP) over 3 years. After detection of LAP, stored saliva from 10 H, 10 H/AA, and 10 LAP/AA subjects was thawed, processed, and tested for (1) lactoferrin (Lf) concentration and iron levels; (2) agglutination of Aa; (3) killing of Gram-positive bacteria. RESULTS:LAP/AA saliva levels of Lf iron were low prior to and after bone loss (3.6+1.7ngFe/μg) (LAP/AA vs. H and H/AA p≤0.01). Saliva from H/AA subjects caused Aa to agglutinate significantly more than H or LAP/AA saliva (p≤0.01). LAP/AA saliva killed Streptococcus mutans, Streptococcus sanguis and Lactobacillus in vitro by >83%. Saliva from H individuals killed these bacteria by <3.3% (LAP/AA vs. H; p≤0.01). H/AA killing was intermediate. CONCLUSION:LAP/AA saliva showed: low levels of Lf iron, minimal Aa agglutinating activity, and high killing activity against Gram-positive bacteria. Aa-positive healthy saliva (H/AA) showed: higher levels of Lf iron, maximal Aa agglutinating activity, and moderate killing of Gram-positive bacteria. A salivary activity profile can distinguish between subjects who are Aa-positive and remain healthy from those who develop LAP.

journal_name

Arch Oral Biol

journal_title

Archives of oral biology

authors

Fine DH,Furgang D,McKiernan M,Rubin M

doi

10.1016/j.archoralbio.2012.10.009

subject

Has Abstract

pub_date

2013-06-01 00:00:00

pages

611-20

issue

6

eissn

0003-9969

issn

1879-1506

pii

S0003-9969(12)00370-6

journal_volume

58

pub_type

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