[Gastrodine represses expression of IL-1 beta, IL-6 induced by hyperglycemia in gitter cells]

Inflammatory factors have been known to induce nerve cells apoptosis and decrease learning capacity of diabetics. The aim of this study is to evaluate the inhibitory effect of Gastrodine on the expression of interleukin-1 beta (IL-1 beta), interleukin-6 (IL-6) in culturing for gitter cells (BV-2 cells) induced by high concentration of glucose.

The BV-2 cells incubated in vitro with different concentrations of glucose and gastrodine were divided into five groups: control group (glucose: 25 mmol x L(-1)), high concetration of glucose (glucose: 45 mmol x L(-1) HCG) group and Gastrodine groups (glucose 45 mmol x L(-1) with gastrodine 25 mg x L(-1) (LG), 50 mg x L(-1) (MG), 100 mg x L(-1) (HG). After culturing for 24 h, morphological changes of cells were observed by inverted phase contrast microscope. The supernatant protein of IL-1 beta and IL-6 was detected by ELISA. The mRNA expression of IL-1 beta and IL-6 was assessed by Reverse transcription polymerase chain reaction (RT-PCR).

The cells were proned to aggregate, some of them with hypertrophy, distinct nucleoli and branch-shaped hyperplasy in HCG group, while less change in Gastrodine groups. The supernatant protein of IL-1 beta is higher in HCG group than control group (119.53 +/- 15.91) ng x L(-1) vs (25.74 +/- 15.72) ng x L(-1) (P < 0.01), but lower in the gastrodine groups than HCG LG (99.32 +/- 19.66) ng x L(-1), MG (76.94 +/- 17.16) ng x L(-1), HG (88.35 +/- 18.72) ng x L(-1) vs (119.53 +/-15.91) ng x L(-1) (P < 0.05). The supernatant protein of IL-6 protein also higher in HCG than control group (393.7 +/- 17.51) ng x L(-1) vs (125.85 +/- 36.62) ng x L(-1) (P < 0.01), and lower in the gastrodine groups than HCG (LG 327.06 +/- 23.53) ng x L(-1), MG (217.36 +/- 28.81) ng x L(-1), HG (263.17 +/- 22.32) ng x L(-1) vs (393.7 +/- 17.51) ng x L(-1), P < 0.05). The mRNA expression of IL-1 beta was increased significantly higher in HCG than control group (2.77 +/- 0.29) vs (1.13 +/- 0.27) (P < 0.05), but decreased significantly in gastrodine groups than HCG LGA (2.66 +/- 0.31), MGA (2.1 +/- 0.41), HGA (2.4 +/- 0.28) vs (2.77 +/- 0.29) (P < 0.05). The mRNA Expression of IL-6 was higher in HCG than control group (3.97 +/- 0.33) vs (1.05 +/- 0.13) (P < 0.05, but lower in gastrodine groups than HCG LG (3.28 +/- 0.3), MG (2.65 +/- 0.33), HG (3.04 +/- 0.26), vs (3.97 +/- 0.33) (P < 0.05).

Gastrodine can inhibit the expression of IL-1 beta, IL-6 in cultured BV-2 cells induced by high concentration of glucose.