Increased bone resorption by long-term cigarette smoke exposure in animal model

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art_JUNQUEIRA_Increased_bone_resorption_by_longterm_cigarette_smoke_exposure_2021.PDF (2.69 MB)
Citações na Scopus
1
Tipo de produção
article
Data de publicação
2021
DOI
Scopus
Web of Science
PubMed
Título da Revista
ISSN da Revista
Título do Volume
Editora
ELSEVIER SCI LTD
Autores
SILVA, Kaique Rodrigues da
ARAUJO, Amanda Aparecida de
ANGELIS, Katia De
Citação
HELIYON, v.7, n.12, article ID e08587, 10p, 2021
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
Introduction: Clinical and experimental studies have been attesting the deleterious effects of smoking mainly due to the stimulation of osteoclastogenesis and inhibition of osteoblastogenesis. However the physiological mechanisms that can explain these changes are not fully understood. Aims: To evaluate the trabecular bone resorption effect caused by long-term exposure to cigarette smoke and the action of cytokines and reactive oxygen species involved in this process. Methods: Sixty young adult C57BL/6 mice were allocated to two groups: control, 30 animals exposed to filtered air for 1, 3 and 6 months; and smoke, 30 animals exposed to cigarette smoke for 1, 3 and 6 months. Femoral and tibial extraction was performed to evaluate the bone mineral matrix, bone cytokines (Receptor activator of nuclear factor-kappa B ligand -RANKL and Osteoprotegerin -OPG) and oxidative stress markers (Thiobarbituric acid reactive substances -Tbars). Results: Exposure to cigarette smoke (CS) generated changes in bone structural parameters in the 6th month of follow-up, demonstrating an evident bone loss; reduction in OPG/RANKL ratio from the 3rd month on and increase in Tbars in the first month, both closely related to the increase in osteoclastogenic activity and bone resorption. Conclusion: These findings reinforce the importance of CS-induced oxidative stress in bone compromising the bone cellular activities with a consequent impairment in bone turn over and changes in bone structure.
Palavras-chave
Smoking, Bone remodeling, Bone matrix, Oxidative stress
URI
https://observatorio.fm.usp.br/handle/OPI/44318
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Coleções
Artigos e Materiais de Revistas Científicas - FM/MCM
Artigos e Materiais de Revistas Científicas - HC/ICHC
Artigos e Materiais de Revistas Científicas - HC/InCor
Artigos e Materiais de Revistas Científicas - LIM/05
Artigos e Materiais de Revistas Científicas - LIM/16
Artigos e Materiais de Revistas Científicas - LIM/20
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