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http://hdl.handle.net/1843/82313| Type: | Artigo de Periódico |
| Title: | Targeting phosphatidylinositol-3-kinase for inhibiting maxillary bone resorption |
| Authors: | Mariana de Souza Santos Virginia Tereza Morais Lima Barrioni Breno Rocha Barrioni Juliana Priscila Vago José Alcides Almeida de Arruda Pedro Henrique Dias Moura Prazeres Flávio Almeida Amaral Tarcília Aparecida da Silva Soraia Macari |
| Abstract: | Previous studies have suggested a role of phosphatidylinositol-3-kinase gamma (PI3Kγ) in bone remodeling, but the mechanism remains undefined. Here, we explored the contribution of PI3Kγ in the resorption of maxillary bone and dental roots using models of orthodontic tooth movement (OTM), orthodontic-induced inflammatory root resorption, and rapid maxillary expansion (RME). PI3Kγ-deficient mice (PI3Kγ-/- ), mice with loss of PI3Kγ kinase activity (PI3KγKD/KD ) and C57BL/6 mice treated with a PI3Kγ inhibitor (AS605240) and respective controls were used. The maxillary bones of PI3Kγ-/- , PI3KγKD/KD , and C57BL/6 mice treated with AS605240 showed an improvement of bone quality compared to their controls, resulting in reduction of the OTM and RME in all experimental groups. PI3Kγ-/- mice exhibited increased root volume and decreased odontoclasts counts. Consistently, the pharmacological blockade or genetic deletion of PI3K resulted in increased numbers of osteoblasts and reduction in osteoclasts during OTM. There was an augmented expression of Runt-related transcription factor 2 (Runx2) and alkaline phosphatase (Alp), a reduction of interleukin-6 (Il-6), as well as a lack of responsiveness of receptor activator of nuclear factor kappa-Β (Rank) in PI3Kγ-/- and PI3KγKD/KD mice compared to control mice. The maxillary bones of PI3Kγ-/- animals showed reduced p-Akt expression. In vitro, bone marrow cells treated with AS605240 and cells from PI3Kγ-/- mice exhibited significant augment of osteoblast mineralization and less osteoclast differentiation. The PI3Kγ/Akt axis is pivotal for bone remodeling by providing negative and positive signals for the differentiation of osteoclasts and osteoblasts, respectively. |
| Subject: | Bone remodeling Maxilla Tooth movement techniques Phosphatidylinositol 3-kinase Enzymes Bone resorption Root resorption Osteoclasts Osteoblasts Gene deletion Proteins Receptor activator of nuclear factor-kappa B Minerals Alkaline phosphatase Interleukin-6 |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | FAO - DEPARTAMENTO DE CLÍNICA FAO - DEPARTAMENTO DE ODONTOLOGIA RESTAURADORA ICB - DEPARTAMENTO DE BIOQUÍMICA E IMUNOLOGIA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1002/jcp.31121 |
| URI: | http://hdl.handle.net/1843/82313 |
| Issue Date: | Nov-2023 |
| metadata.dc.url.externa: | https://onlinelibrary.wiley.com/doi/10.1002/jcp.31121 |
| metadata.dc.relation.ispartof: | Journal of cellular physiology |
| Appears in Collections: | Artigo de Periódico |
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