Arnez MFM, Monteiro PM, Paula-Silva FWG, Dessotti GB, Menezes LMD, Küchler EC, Alves SYF, Matsumoto MAN, Stuani MBS. Impact of cigarette smoke on osteogenic and osteoclast signaling in middle palatal suture.
Braz Dent J 2022;
33:99-108. [PMID:
35508042 PMCID:
PMC9645154 DOI:
10.1590/0103-6440202203966]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 05/05/2021] [Indexed: 11/30/2022] Open
Abstract
Considering that smoking is a public health problem that has been growing among
adolescents, the aim of this study was to investigate the impact of cigarette
smoke on osteogenic and osteoclastogenic signaling in middle palatal suture of
rats. Male Wistar rats exposed (n = 30) or not to cigarette smoke (n = 30) were
used. Exposure to smoke was carried out for two daily periods of 3 minutes each,
with an interval of 12 hours between exposures. After the experimental periods
of 3, 7, 14 and 21 days, the animals were euthanized. The collected tissues were
analyzed using light microscopy and real-time RT-PCR was performed to
investigate gene expression. The data obtained were compared using the Kruskal
Wallis and Dunn tests (⍺ = 5%). Morphologically, there were no significant
changes in the middle palatal suture of rats exposed or not to cigarette smoke
during 3, 7, 14 and 21 days (p> 0.05). On the other hand, osteoclastogenic
signaling was increased in animals exposed to smoke and was characterized by a
higher production of RANKL at 3 and 14 days (p <0.05), with no change in the
synthesis of RANK and osteoprotegerin (p> 0.05). Interestingly, in the
exposed animals, an early increase in the synthesis of osteocalcin, bone
sialoprotein and osteopontin was also identified at 3 days of exposure (p
<0.05), not sustained over time (p> 0.05). Cigarette smoke modulates
osteogenic and osteoclastogenic signaling in the middle palatal suture of young
rats, although morphological changes have not been evidenced.
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