Fig. 1

mGluR3, mGluR1, mGluR5 expression changes after HI injury (× 400). A Trends of mGluR3 immunostaining in the brain and mean optical density in after-HI groups at 6–12 h, 12–24 h, 24–48 h and 48–72 h, with respective controls. Green fluorescence represents mGluR3. B Trends of mGluR1 immunostaining and mean optical density in after HI groups at 6–12 h, 12–24 h, 24–48 h and 48–72 h. Green fluorescence represents mGluR1. C Trends of mGluR5 staining and mean optical density at 6–12 h, 12–24 h, 24–48 h and 48–72 h groups after HI, with respective controls. The green fluorescence represents mGluR5. **P < 0.01, *P < 0.05, data expressed as mean ± standard deviation