[Neuroprotective role of silent information regulator 1 in Alzheimer's disease].

Silent information regulator 1 (SIRT1), an NAD(+)-dependent deacetylase, is involved in the regulation of gene transcription, energy metabolism and cell aging. Recent studies have showed that SIRT1 possesses neuroprotective effects, however, it is not very clear how SIRT1 exerts the neuroprotection in Alzheimer's disease (AD). In this review, we summarized the neuroprotective role of SIRT1 in AD and its possible molecular mechanisms, proposing a novel strategy for preventing and treating neurodegeneration.

[Activation of periphery group III metabotropic glutamate receptors inhibits formalin-induced activation of spinal p38-MAPK in rats].

AIM: To explore the effects of periphery injection of L-SOP on the activation of p38MAPK in spinal cord in formalin pain model in rats. METHODS: Fourty-eight male Wistar rats were divided randomly into four groups (n=12): NS group and three different dose of L-SOP groups. For each group, 6 rats used to observe flinching and licking time every as nociception behavior 3 minutes in 1 hour after formalin injected and the other 6 rats used to observe the activation of p38(P-p38) by Western blotting. RESULTS: All the three different groups of L-SOP could inhibit nociception behavior in the tonic phase,and 250 nmoVl/L and 500 nmol/L groups could suppress not only in the tonic phase but also in the acute phase. 250 nmol/L and 500 nmol/L groups could reduce activated or phosphorylated p38MAPK in spinal cord. CONCLUSION: Periphery injection of L-SOP can reduce nociceptive behavior and phosphorylated p38MAPK in the spinal cord in formalin-induced hyperalgia, it is suggested that there is functional expression of mGluRs III in the periphery and is involved in the processing of peripheral noxious informations.