Polymorphism of the CD14 and TLR4 genes and post-treatment apical periodontitis.
BACKGROUND
This study investigated the association of CD14 -260C>T and TLR4 +896A>G gene polymorphisms with post-treatment apical periodontitis in Brazilian individuals.


METHODS
The study population consisted of 41 patients with post-treatment apical periodontitis and 42 individuals with root canal-treated teeth exhibiting healed/healing periradicular tissues (controls). All teeth had apical periodontitis lesions at the time of treatment, which was completed at least 1 year previously. Saliva was collected from the participants; DNA was extracted and used for CD14 and TLR4 genotyping using the polymerase chain reaction-restriction fragment length polymorphism approach and a real-time polymerase chain reaction TaqMan assay (Applied Biosystems, Foster City, CA), respectively.


RESULTS
No specific genotype or allele of the CD14 and TLR4 genes or any combination thereof was positively associated with post-treatment apical periodontitis (P > .05).


CONCLUSIONS
Data from the present study suggest that polymorphisms in the CD14 and TLR4 genes do not influence the response to endodontic treatment of teeth with apical periodontitis.
Department of Endodontics and Molecular Microbiology Laboratory, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil.
Isabela N
IN
Rôças
Department of Endodontics and Molecular Microbiology Laboratory, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil. Electronic address: jf_siqueira@yahoo.com.
José F
JF
Siqueira
Department of Endodontics and Molecular Microbiology Laboratory, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil.
Camila A
CA
Del Aguila
Department of Endodontics and Molecular Microbiology Laboratory, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil.
José C
JC
Provenzano
Department of Endodontics and Molecular Microbiology Laboratory, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil.
Bianca P S
BP
Guilherme
Department of Endodontics and Molecular Microbiology Laboratory, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil.
Lucio S
LS
Gonçalves
D000225:Adenine; D000328:Adult; D003596:Cytosine; D005260:Female; D005787:Gene Frequency / Q000235:genetics; D005838:Genotype; D006147:Guanine; D006720:Homozygote; D006801:Humans; D018950:Lipopolysaccharide Receptors / Q000235:genetics*; D008297:Male; D010485:Periapical Periodontitis / Q000235:genetics / Q000628:therapy*; D016133:Polymerase Chain Reaction / Q000379:methods; D011110:Polymorphism, Genetic / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length / Q000235:genetics; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D016300:Radiography, Bitewing / Q000379:methods; D060888:Real-Time Polymerase Chain Reaction / Q000379:methods; D012390:Root Canal Therapy / Q000379:methods; D012463:Saliva / Q000737:chemistry; D012907:Smoking; D013941:Thymine; D051197:Toll-Like Receptor 4 / Q000235:genetics*; D014945:Wound Healing / Q000235:genetics
D018950:Lipopolysaccharide Receptors; C495345:TLR4 protein, human; D051197:Toll-Like Receptor 4; D006147:Guanine; D003596:Cytosine; D000225:Adenine; D013941:Thymine
CD14; TLR4; genetic polymorphism; post-treatment apical periodontitis