MENG Feifei,GAO Zhili,WANG Jiayun,et al.Mechanism of Youguiwan Regulating BMP-2/Smad Signaling Pathway to Promote Bone Formation in Postmenopausal Rats with Osteoporosis[J].Chinese Journal of Experimental Traditional Medical Formulae,2024,30(04):100-106.
MENG Feifei,GAO Zhili,WANG Jiayun,et al.Mechanism of Youguiwan Regulating BMP-2/Smad Signaling Pathway to Promote Bone Formation in Postmenopausal Rats with Osteoporosis[J].Chinese Journal of Experimental Traditional Medical Formulae,2024,30(04):100-106. DOI: 10.13422/j.cnki.syfjx.20231203.
Mechanism of Youguiwan Regulating BMP-2/Smad Signaling Pathway to Promote Bone Formation in Postmenopausal Rats with Osteoporosis
To observe the effects of Youguiwan on bone metabolism and bone morphogenetic protein-2 (BMP-2)/Smad signaling pathway in ovaries-removed rats with osteoporosis and study the mechanism of Youguiwan in the prevention and treatment of osteoporosis.
Method
2
A postmenopausal rat model of osteoporosis was prepared by bilateral ovariectomy. The 40 female SD rats were randomly divided into five groups, including sham operation group, model group, alendronate sodium group (0.1 mg·kg
-1
), and high-dose and low-dose (5.36 and 2.68 g·kg
-1
)
groups of Youguiwan. The drug was given seven days after modeling, once a day for 12 weeks. After the treatment, the changes in femur tissue structure were observed by micro-CT, including bone mineral density (BMD), bone volume/total volume (BV/TV), trabecular number (Tb.N), trabecular thickness (Tb.Th), bone surface/bone volume (BS/BV), and trabecular separation (Tb.Sp). Ossification was observed by saffrane-solid green staining, and serum levels of bone metabolism markers, including bone alkaline phosphatase (BALP), osteocalcin (BGP), type Ⅰ procollagen amino terminal propeptide (PINP), and tartrate-resistant acid phosphatase 5b (TRACP-5b), were determined by enzyme-linked immunosorbent assay (ELISA). The protein and mRNA expression levels of Runx2, BMP-2, and Smad1 in rat femur were detected by Western blot and Real-time fluorescence quantitative polymerase chain reaction (Real-time PCR).
Result
2
Compared with the sham operation group, bone trabecula in the model group was sparse. BMD, BV/TV, Tb.N, and Tb.Th were decreased (
P<
0.05,
P<
0.01). BS/BV (
P<
0.05) and Tb.Sp were increased. The content of BGP, BALP, PINP, and TRACP-5b in serum was significantly increased (
P<
0.01). The mRNA and protein expressions of Runx2, BMP-2, and Smad1 in rat femur were significantly decreased (
P<
0.05,
P<
0.01). Compared with the model group, the number of bone trabeculae in the high-dose and low-dose groups of Youguiwan was increased, and the bone microstructure was improved. BMD, BV/TV, Tb.N, and Tb.Th were increased significantly (
P<
0.05,
P<
0.01), and BS/BV and Tb.Sp were increased. The content of bone metabolic markers decreased (
P<
0.05,
P<
0.01).
Conclusion
2
Youguiwan has certain preventive and therapeutic effects on postmenopausal osteoporosis, and its mechanism may be related to promoting bone formation by regulating the BMP-2/Smad signaling pathway.
PASCHALIS E P , GAMSJAEGER S , HASSLER N , et al . Vitamin D and calcium supplementation for three years in postmenopausal osteoporosis significantly alters bone mineral and organic matrix quality [J]. Bone , 2017 , 95 : 41 - 46 .
LIANG H , LIU L W , MA Y C , et al . Origin and relationship of medicine tropism,guiding medicinal,extra conductive ingredient,and fFormula tropism [J]. Acta Chin Med Pharmacol , 2018 , 46 ( 1 ): 103 - 108 .
LIU H , ZHU R , LIU C , et al . Evaluation of decalcification techniques for rat femurs using HE and immunohistochemical staining [J]. BioMed research international , 2017 , doi: 10.1155/2017/9050754 http://dx.doi.org/10.1155/2017/9050754 .
KIM J H , KIM M , HONG S , et al . Albiflorin promotes osteoblast differentiation and healing of rat femoral fractures through enhancing BMP-2/Smad and Wnt/ β -catenin signaling [J]. Front Pharmacol , 2021 , 12 : 690113 .
WANG Z , BAO H W . Cnidium lactone stimulates osteogenic differentiation of bone marrow mesenchymal stem cells via BMP-2/smad-signaling cascades mediated by estrogen receptor [J]. Am J Transl Res , 2019 , 11 ( 8 ): 4984 - 4991 .