Neuroprotective effects of consuming bovine colostrum after focal brain ischemia/reperfusion injury in rat model

To investigate the neuroprotective effects of bovine colostrums (BC), we evaluate the ability of consuming BC after focal brain ischemia/reperfusion injury rat model to reduce serum cytokine levels and infarct volume, and improve neurological outcome. Sprague-Dawley rats were randomly divided into 4 groups; one sham operation and three experimental groups. In the experimental groups, MCA occlusion (2 h) and subsequent reperfusion (O/R) were induced with regional cerebral blood flow monitoring. One hour after MCAO/R and once daily during the experiment, the experimental group received BC while the other groups received 0.9% saline or low fat milk (LFM) orally. Seven days later, serum pro-inflammatory cytokine (IL-1beta, IL-6, and TNF-alpha) and anti-inflammatory cytokine (IL-10) levels were assessed. Also, the infarct volume was assessed by using a computerized image analysis system. Behavioral function was also assessed using a modified neurologic severity score and corner turn test during the experiment. Rats receiving BC after focal brain I/R showed a significant reduction (-26%/-22%) in infarct volume compared to LFM/saline rats, respectively (P < 0.05). Serum IL-1beta, IL-6, and TNF-alpha levels were decreased significantly in rats receiving BC compared to LFM/saline rats (P < 0.05). In behavioral tests, daily BC intake showed consistent and significant improvement of neurological deficits for 7 days after MCAO/R. BC ingestion after focal brain ischemia/reperfusion injury may prevent brain injury by reducing serum pro-inflammatory cytokine levels and brain infarct volume in a rat model.

Protective effects of NMT on MCAO induced-focal brain ischemia-reperfusion injury in rats / 医学研究生学报

Objectives: To study the protective effects of Nao Mai Tong(NMT) on middle cerebral artery occlusion(MCAO) induced focal brain ischemia reperfusion injury in rats. Methods: After rats were respectively given NMT 1 g/kg, 3 g/kg, 9 g/kg ig everyday for 1 week, the effects of NMT on the histological changes and behavior disorder caused by focal brain ischemia reperfusion which was made by occlusion of middle cerebral artery were investigated. The gasping time after the cutting of the head in ischemia reperfusion rat was recorded. The contents of ATP and LA were determined by radioimmunoassay. Results: NMT significantly reduced the extent of behavior disorder, descended the rate of cerebral infarction area, and improved histological injury of brain tissues. The grasping time after head cutting was prolonged. It was found that the level of ATP was increased and LA was decreased markedly. Conclusions: NMT shows a significant protective effect on histological, behavior and energy metabolic consequences of MCAO induced focal brain ischemia reperfusion injury.