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  2. Phytic acid improves osteogenesis and inhibits the senescence of human bone marrow mesenchymal stem cells under high-glucose conditions via the ERK pathway

Phytic acid improves osteogenesis and inhibits the senescence of human bone marrow mesenchymal stem cells under high-glucose conditions via the ERK pathway

  • Chem Biol Interact. 2023 Nov 22:110818. doi: 10.1016/j.cbi.2023.110818.
Dong-Yu Liu 1 Jin Wu 1 He-Yang Zhou 1 Jia-Xin Lv 1 Kun-Zhan Cai 1 Chun-Bo Tang 2
Affiliations

Affiliations

  • 1 Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, China; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, China; Department of Dental Implantology, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, Jiangsu, China.
  • 2 Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing, Jiangsu, China; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, China; Department of Dental Implantology, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, Jiangsu, China. Electronic address: cbtang@njmu.edu.cn.
Abstract

Hyperglycaemia causes impairment of osteogenic differentiation and accelerates stem cell senescence, resulting in weakened osteogenesis and disordered bone metabolism. Phytic acid (PA) is an antioxidant that is reportedly beneficial to bone homeostasis. The present study aims to clarify how PA affects the osteogenic capacity and cellular senescence of bone marrow mesenchymal stem cells (BMSCs) exposed to high-glucose environments, as well as the potential molecular mechanisms. Our results indicate that osteogenic differentiation in BMSCs cultivated in high-glucose conditions is enhanced by PA, as evidenced by increased Alkaline Phosphatase activity and staining, Alizarin Red S staining, osteogenic marker in in vitro studies, and increased osteogenesis in animal experiments. PA also prevented high-glucose-induced senescence of BMSCs, as evidenced by the repression of Reactive Oxygen Species production, senescence-associated β-galactosidase staining, and P21 and P53 expression. Furthermore, it was found that PA rescued the high-glucose-inhibited expression of phosphorylated extracellular regulated protein kinases (p-ERK). The inhibition of ERK by the specific inhibitor PD98059 blocked the PA-enhanced osteogenesis of BMSCs and promoted cell senescence. Our results revealed that PA enhances osteogenic differentiation and inhibits BMSC senescence in a high-glucose environment. In addition, the activation of the ERK pathway seems to mediate the beneficial effects of PA. The findings provide novel insights that could facilitate bone regeneration in patients with diabetes.

Keywords

Bone marrow mesenchymal stem cells; Cell senescence; ERK pathway; Osteogenic differentiation; Phytic acid.

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