Tol-like receptor 3 protein expression has been shown to be upregulated during cerebral ische-mia/reperfusion injury in rats. In this study, rat primary cortical neurons were subjected to oxy-gen-glucose deprivation to simulate cerebral ischemia/reperfusion injury. Chemical y synthesized smal interfering RNA (siRNA)-1280,-1724 and-418 specific to tol-like receptor 3 were transfected into oxygen-glucose deprived cortical neurons to suppress the upregulation of tol-like receptor 3 protein expression. Western blotting demonstrated that after transfection with siRNA, tol-like ceptor 3 protein expression reduced, especial y in the tol-like receptor 3-1724 group. These results suggested that siRNA-1724 is an optimal sequence for inhibiting tol-like receptor 3 expression in cortical neurons fol owing oxygen-glucose deprivation.

Objective　To assess the effect of tetrandrine (Tet) pulmonary targeting microspheres on hypoxic pulmonary hypertension and evaluate its selective action on pulmonary circulation.Methods　Twenty rats were exposed to hypoxic conditions for 3 weeks. Ten rats were used as normoxic controls. We administered Tet pulmonary targeting microspheres to 10 hypoxic rats and Tet aqueous solution to 10 hypoxic rats and the 10 control rats. Mean pulmonary arterial pressure (mPAP) was measured by a right cardiac catheterization, and mean systemic blood pressure (mSBP) was measured by left femoral catheterization. Results　Rats exposed to hypoxia developed pulmonary hypertension. The decrease in mPAP in rats treated with Tet pulmonary targeting microspheres was significantly greater than that in rats receiving Tet aqueous solution (P<0.05), and the effects were longer with Tet pulmonary targeting microspheres. Moreover, Tet pulmonary targeting microspheres, unlike Tet aqueous solution, did not decrease mSBP.Conclusion　Tet pulmonary targeting microspheres were more effective than Tet aqueous solution in treating hypoxic pulmonary hypertension and acted selectively on the pulmonary circulation.

Changes of microcirculation in healthy volunteers and patients with septic shock in Xining