Influence of edaravone on growth arrest and DNA damage-inducible protein 34 expression following focal cerebral ischemia-reperfusion in rats

Objective:To investigate the influence of edaravone on the expression of growth arrest and DNA damage-inducible protein 34 (GADD34). Methods: A total of 108 healthy male Sprague-Dawley rats were randomly divided into sham operation group, model group and edaravone group (36 cases for each group). Transient focal cerebral ischemia was induced by middle cerebral artery occlusion for 2 h followed by reperfusion in Sprague-Dawley rats. Then, GADD34 expression was measured with immunohistochemistry at different time-points after reperfusion in the peri-infarct regions of all rats. Results: The GADD34 expression was detected in the peri-infarct regions of rats 1 h after reperfusion, which reached its peak 24 h after reperfusion. And edaravone could significantly down-regulate the GADD34 expression. Conclusions:Edaravon could down-regulate GADD34 expression, which suggests that edaravone may exert an important function in inhibiting endoplasmic reticulum stress reaction by scavenging free radicals in the upper stream.

Study on differentiation of adipose-derived stem cells into neural cells induced by supernatant liquid from brain tissue in rats / 中华老年医学杂志

Objective To observe the effect of supernatant liquid from brain tissue on the differentiation of adipose-derived stem cells (ADSCs) into neural cells in normal brain tissues, the homogenate of infarcted cerebral hemisphere and the opposite side in the rats. Methods The ADSCs were obtained from rat retroperitoneal adipose tissue. The normal brain tissues, the homogenate of the infarcted cerebral hemisphere and thc opposite side got from middle cerebral artery occlusion in rats were used to induce ADSCs. Immunocytochemistry or immunofluorescence were used to identify the cell types at the 3rd day. Positive expression rate was counted by fluorescence microscope. Results (1)The neuron-specific enolase (NSE) positive cells, microtubule-associated protein 2 (MAP-2) positive cells and glial fibrillary acidic protein (GFAP) positive cells were much more in the homogenate of the infracted cerebral hemisphere than in others (P＜0.05). (2)The NSE positive cells, MAP-2 positive cells and GFAP positive cells were much more in the homogenate of the normal brain tissues and the opposite side than normal level ( P ＜ 0. 05 ) . Conclusions The homogenate of the infracted cerebral hemisphere and the opposite side can induce adipose-derived stem cells into neural-like cells and express neural cells markers in rats.