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Arch Oral Biol. 2016 Jun;66:108-19. doi: 10.1016/j.archoralbio.2016.02.014. Epub 2016 Feb 26.

Favourable effects of Bacillus subtilis and Bacillus licheniformis on experimental periodontitis in rats.

Author information

1
Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirao Preto, University of Sao Paulo-USP, Av. Café, 14040-904 Ribeirao Preto, SP, Brazil. Electronic address: m.messora@forp.usp.br.
2
Physiology and Pharmacology Department, Federal University of Lavras, Av. Doutor Sylvio Menicucci, 1001, 37200-000 Lavras, MG, Brazil.
3
Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirao Preto, University of Sao Paulo-USP, Av. Café, 14040-904 Ribeirao Preto, SP, Brazil.
4
Laboratory of Immunology and Molecular Biology, Sao Leopoldo Mandic, Street Dr. José Rocha Junqueira, 13, 13045-755 Campinas, SP, Brazil.
5
Department of Surgery and Integrated Clinic, Dental School of Aracatuba, UNESP-Univ Estadual Paulista, Street José Bonifácio, 1193, 16015-050 Aracatuba, SP, Brazil.
6
Department of Basic Sciences, Division of Histology, Dental School of Aracatuba, UNESP-Univ Estadual Paulista, Rodovia Marechal Rondon, km 527, 16021-900 Aracatuba, SP, Brazil.

Abstract

OBJECTIVES:

The purposes of this study were to evaluate, in rats: i) the effects of Bacillus species on the development of experimental periodontitis (EP) via microtomographic, immunological and hematological assays (Experiment 1-E1); ii) the effects of Bacillus species as adjuncts to scaling and root planing (SRP) for the treatment of EP via histomorphometric and immunohistochemical analyses (Experiment 2-E2).

METHODS:

In E1, 24 rats were divided into groups C1 (control), PROB1, EP1 and EP-PROB1. In groups with EP, the mandibular first molar of each animal received a ligature for 14 days. In groups PROB1, animals received Bacillus species for 44 days, starting 30 days before EP induction in Group EP-PROB1. In E2, 24 rats were assigned to groups C2 (control), PROB2, EP-SRP2 and EP-SRP-PROB2. In groups with SRP, EP was induced as described in E1. The ligatures were removed after 14 days and SRP was performed. In groups PROB2, animals received Bacillus species for 15 days, starting after SRP in Group EP-SRP-PROB2.

RESULTS:

In E1, Group EP1 presented bone loss (BL) and eosinophil numbers greater than Group EP-PROB1 (P<0.05). In Group EP-PROB1, the receptor activator of nuclear factor-kB ligand (RANKL)/osteoprotegerin (OPG) ratio was similar to that of groups without EP. In E2, Group EP-SRP-PROB2 presented fewer TRAP-positive osteoclasts, lower immunolabeling pattern for a proinflammatory cytokine and decreased BL and attachment loss than Group EP-SRP2 (P<0.05).

CONCLUSIONS:

Bacillus species supplementation provided a protective effect against BL and enhanced the effects of SRP in the treatment of EP in rats.

KEYWORDS:

Periodontitis; Probiotics; Rats; Root planing

[Indexed for MEDLINE]

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