[The Effect of Disordered Glycometabolism of Kashin-Beck Disease on the Function of Chondrocytes]

Abstract

Objective: To reveal the effect of disordered glycometabolism in Kashin-Beck disease (KBD) chondrocytes,we compared changes in expressions of extracellular matrix components (collagen and aggrecan),apoptosis and oxidative stress under the condition of different concentrations of glucose.

Methods: The damage of KBD chondrocytes and normal chondrocytes under high glucose culture was measured in compared with cells under normal culture,that included the changes of proliferation and morphology; the concentrations of glucose in culture medium during the process of chondrocytes culture; the expressions of type Ⅱ collagen and aggrecan detected by quantitative real-time polymerase chain reaction (qRT-PCR) and Toluidine blue staining; cell apoptosis and reactive oxygen species (ROS) content detected by flow cytometry and fluorescence staining.

Results: The growth and proliferation of KBD chondrocytes were inferior to normal chondrocytes. The glucose uptake of KBD chondrocytes and normal chondrocytes under high glucose culture were basically the same (P>0.05). Disordered glycometabolism caused by high glucose decreased the expression of type Ⅱ collagen and aggrecan in KBD chondrocytes (P<0.05),meanwhile,increased apoptosis and cellular ROS generation of cultured chondrocytes (P<0.05).

Conclusion: The disordered glycometabolism can affect the function of KBD chondrocytes through reducing the expression of type Ⅱ collagen and aggrecan and increasing the apoptosis and the oxidative stress.

Keywords: Cellular function; Glycometabolism; Kashin-Beck disease.