Chinese Journal of Tissue Engineering Research ›› 2019, Vol. 23 ›› Issue (25): 3956-3960.doi: 10.3969/j.issn.2095-4344.1766

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Lithium chloride promotes proliferation and differentiation of bone marrow mesenchymal stem cells via Wnt/beta-catenin signaling pathway

Fu Yin1, Sun Guicai2, Tu Yuanqing2, Ling Xiaopeng2
  

  1. 1Heilongjiang University of Traditional Chinese Medicine, Harbin 150036, Heilongjiang Province, China; 2Department of Orthopedics, Fourth Affiliated Hospital of Nanchang University, Nanchang 330003, Jiangxi Province, China
  • Revised:2019-02-16 Online:2019-09-08 Published:2019-09-08
  • Contact: Sun Guicai, MD, Chief physician, Department of Orthopedics, Fourth Affiliated Hospital of Nanchang University, Nanchang 330003, Jiangxi Province, China
  • About author:Fu Yin, MD, Intermediate researcher, Heilongjiang University of Traditional Chinese Medicine, Harbin 150036, Heilongjiang Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81473503 (to SGC)

Abstract:

BACKGROUND: Seeking proper methods to promote the proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells can provide therapeutic ideas for the treatment of osteoporosis.
OBJECTIVE: To study the mechanism of lithium chloride on the proliferation and differentiation of rat bone marrow mesenchymal stem cells.
METHODS: Rat bone marrow mesenchymal stem cells were cultured with the whole bone marrow cell inoculation and adherent purification, followed by intervention with 0, 2, 5 nmol/L lithium chloride. Cell counting kit-8 was used to detect the effect of lithium chloride on the proliferation of bone marrow mesenchymal stem cells. Alizarin red staining was used to determine calcified nodules. PNPP method was applied to measure alkaline phosphatase activity. The contents of glycogen synthase kinase 3β, phosphorylated glycogen synthase kinase 3β and β-catenin in rat bone marrow mesenchymal stem cells were determined by western blot.
RESULTS AND CONCLUSION: Lithium chloride, 2 and 5 nmol/L, promoted the proliferation of bone marrow mesenchymal stem cells and
5 nmol/L lithium chloride had the strongest proliferative effect. Compared with 0 nmol/L group, more calcified nodules and higher alkaline phosphatase activity were observed in the 2 and 5 nmol/L groups, especially in the 5 nmol/L group. Both 2 and 5 nmol/L lithium chloride upregulated the expression of phosphorylated glycogen synthase kinase 3β and β-catenin proteins, but showed no difference in the expression of glycogen synthase kinase 3β. In conclusion, lithium chloride can promote the proliferation and osteogenic differentiation of rat bone marrow mesenchymal stem cells, and the possible mechanism is through the regulation of Wnt/β-catenin signaling pathway-related protein expression.

Key words: lithium chloride, bone marrow mesenchymal stem cells, cell proliferation, osteogenic differentiation, calcified nodules, alkaline phosphatase activity, Wnt/β-catenin signaling pathway, National Natural Science Foundation of China

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