Osteoporosis is a common systemic bone disease, which is characterized by decreased bone mass and degeneration of bone tissue structure. Recent evidence shows that oxidative stress is caused by the imbalance of oxidants and antioxidants in favor of the former, which is the main factor in the development and progress of osteoporosis.
Fig. 1 ROS signaling cascades regulate osteoclast and osteoblast (Tao et al., 2020)
Osteoblast apoptosis plays an important role in bone development and maintenance, and contributes to osteoporosis, glucocorticoid excess and aging caused by sex steroid deficiency to a certain extent. Many studies have shown that oxidative stress continues to increase under these pathological conditions, which may help to inhibit osteoblast differentiation and proliferation or induce apoptosis.
Creative Bioarray established the oxidative stress model of human osteoblast like cells by stimulating it with H2O2.
Primary cultured human osteoblasts were established by standard technology and identified by bone nodules and alkaline phosphatase. The cells were cultured in the incubator. According to the changes of cell growth density and medium pH, the medium is changed every 2 ~ 3 day. The experiment was carried out when the cells grew to the logarithmic growth stage.
We have found the best concentration and time of H2O2 induction. However, if you choose other cell lines, we will conduct a small-scale grouping experiment before modeling to determine the best modeling conditions.
Cell viability was assessed by MTT assay. The apoptosis rate was analyzed by flow cytometry and TUNEL assay. Mitochondrial ROS and membrane potential were measured by fluorescence microscope. Mitochondrial respiratory enzyme activity was measured using a spectrophotometer. Protein levels were detected by Western blot.
We can also adjust the modeling process according to the specific needs of customers, provide administration experiment, pharmacology, efficacy evaluation and pharmacokinetic analysis, and assist customers to study osteoblast stress and / or pathological significance, which has important theoretical significance for clarifying orthopaedic related diseases.
Using the established osteoblast oxidative stress model, we can help customers explore the antioxidant effect of antioxidants in cells and provide corresponding experimental reports.
The model can be used to study the effects of oxidative stress on the morphology and proliferation of human osteoblast like cells, and provide a theoretical basis for further studying the mechanism of oxidative stress in chronic bone resorption diseases such as periodontitis inflammation.
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