Aggregatibacter actinomycetemcomitans-induced bone loss and antibody response in three rat strains.

Abstract:

BACKGROUND:The aim of this study is to compare the colonization, immunoglobulin (Ig) G response, and alveolar bone loss in Aggregatibacter actinomycetemcomitans (Aa)-inoculated Fawn Hooded Hypertensive (FHH), Dahl Salt-Sensitive (DSS), and Brown Norway (BN) rats. METHODS:Each rat strain was divided into wild-type Aa-inoculated and non-inoculated control groups. Blood taken at 12 weeks after inoculation was assessed for Aa-specific IgG antibodies by an enzyme-linked immunosorbent assay. Colonization was assessed 12 weeks postinoculation. Bone loss was estimated by measuring the distance from the cemento-enamel junction (CEJ) to the alveolar bone crest (ABC) at 20 molar sites. Colonization and antibody levels were compared by using the Student t test. Diseased rats were defined as having two sites per quadrant with CEJ-ABC distances that were significantly greater than the control CEJ-ABC distances. RESULTS:The Aa colonization of FHH rats was significantly higher than in other strains (P <0.05). The Aa-specific IgG levels in the DSS Aa-inoculated group were significantly higher than in its control group (P <0.05). Only FHH rats showed Aa disease-associated bone loss (P = 0.0021). CONCLUSIONS:Aa colonized and caused more disease in FHH rats than in the other rat strains. The rat strains each responded differently to the same Aa strain.

journal_name

J Periodontol

authors

Schreiner H,Markowitz K,Miryalkar M,Moore D,Diehl S,Fine DH

doi

10.1902/jop.2010.100250

subject

Has Abstract

pub_date

2011-01-01 00:00:00

pages

142-50

issue

1

eissn

0022-3492

issn

1943-3670

journal_volume

82

pub_type

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