Article ; Online: Geniposide alleviates cholesterol-induced endoplasmic reticulum stress and apoptosis in osteoblasts by mediating the GLP-1R/ABCA1 pathway.
Journal of orthopaedic surgery and research
2024 Volume 19, Issue 1, Page(s) 179
Abstract: Background: Cholesterol (CHO) is an essential component of the body. However, high CHO levels in the body can damage bone mass and promote osteoporosis. CHO accumulation can cause osteoblast apoptosis, which has a negative effect on bone formation. The ... ...
Abstract | Background: Cholesterol (CHO) is an essential component of the body. However, high CHO levels in the body can damage bone mass and promote osteoporosis. CHO accumulation can cause osteoblast apoptosis, which has a negative effect on bone formation. The pathogenesis of osteoporosis is a complicate process that includes oxidative stress, endoplasmic reticulum (ER) stress, and inflammation. Geniposide (GEN) is a natural compound with anti-osteoporotic effect. However, the roles of GEN in osteopathogenesis are still unclear. Our previous studies demonstrated that GEN could reduce the accumulation of CHO in osteoblasts and the activation of ER stress in osteoblasts. However, the molecular mechanism of GEN in inhibiting CHO-induced apoptosis in osteoblasts needs to be further investigated. Methods: MC3T3-E1 cells were treated with osteogenic induction medium (OIM). Ethanol-solubilized cholesterol (100 µM) was used as a stimulator, and 10 µM and 25 µM geniposide was added for treatment. The alterations of protein expression were detected by western blot, and the cell apoptosis was analyzed by a flow cytometer. Results: CHO promoted osteoblast apoptosis by activating ER stress in osteoblasts, while GEN alleviated the activation of ER stress and reduced osteoblast apoptosis by activating the GLP-1R/ABCA1 pathway. Inhibition of ABCA1 or GLP-1R could eliminate the protective activity of GEN against CHO-induced ER stress and osteoblast apoptosis. Conclusion: GEN alleviated CHO-induced ER stress and apoptosis in osteoblasts by mediating the GLP-1R/ABCA1 pathway. |
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MeSH term(s) | Humans ; Osteoblasts/metabolism ; Osteoporosis/metabolism ; Apoptosis ; Endoplasmic Reticulum Stress ; Cholesterol/metabolism ; ATP Binding Cassette Transporter 1/metabolism ; ATP Binding Cassette Transporter 1/pharmacology ; Iridoids |
Chemical Substances | geniposide (145295QLXY) ; Cholesterol (97C5T2UQ7J) ; ABCA1 protein, human ; ATP Binding Cassette Transporter 1 ; Iridoids |
Language | English |
Publishing date | 2024-03-11 |
Publishing country | England |
Document type | Letter |
ZDB-ID | 2252548-8 |
ISSN | 1749-799X ; 1749-799X |
ISSN (online) | 1749-799X |
ISSN | 1749-799X |
DOI | 10.1186/s13018-024-04665-4 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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