Subarachnoid haemorrhage as a valid model for stroke

中风的破坏性影响最常见的原因是血凝块阻塞了供应大脑的血管。血液流动对正常的脑功能至关重要，停止血液供应，即使只有几分钟，也会导致脑细胞和患者的损伤和死亡。我们对中风时大脑发生的变化了解甚多，但开发对病人有效的新疗法一直非常困难。这部分是因为中风患者不容易研究。我们相信，通过研究一种叫做蛛网膜下腔出血的相关疾病，我们可以获得关于中风和相关脑部疾病的重要信息，也许还能开发出新的治疗方法。在蛛网膜下腔出血中，脑血管破裂而不是凝块（如中风）。我们知道蛛网膜下腔出血可能以类似中风的方式损害脑细胞，现在想确定脑出血状况是否可以用于研究中风和开发新药。我们将通过研究已建立的中风和蛛网膜下腔出血动物模型，以及中风和蛛网膜下腔出血患者来做到这一点。我们的研究将包括大脑成像和研究血液中的分子，我们知道这与病人的康复与否有关。我们希望测试这些分子的水平是否在动物模型和患者的血液中发生类似的变化，以及中风患者是否表现出与蛛网膜下腔出血患者相似的变化。我们还将监测动物和患者的脑损伤程度，看看它是否与血液中分子的变化有关。如果我们在动物和患者之间看到类似的变化，那么这表明蛛网膜下腔出血患者可以用于研究中风和测试新的治疗方法。

The devastating effects of a stroke are caused most commonly by a blood clot which blocks a blood vessel that supplies the brain. Blood flow is essential for normal brain function and stopping the blood supply, even for a few minutes, can cause damage and death of brain cells and the patient. We know a great deal about what happens to the brain during a stroke, but it has been very difficult to develop new treatments that are effective for patients. This is partly because stroke patients are not easy to study. We believe that we can get important information about stroke and related brain diseases, and perhaps develop new treatments, by studying a related condition called subarachnoid haemorrhage.In subarachnoid haemorrhage a blood vessel in the brain bursts rather than clots (as in stroke). We know that subarachnoid haemorrhage probably damages brain cells in a similar way to stroke, and now want to determine if the brain bleeding condition can be used to study stroke and to develop new drugs. We will do this by studying established animal models of stroke and subarachnoid haemorrhage, and patients with stroke and subarachnoid haemorrhage. Our research will involve imaging the brain and studying molecules in the blood, which we know are related to whether the patients will do well or not so well. We wish to test whether similar changes in the levels of these molecules occur in the blood of the animal models and patients, and also if stroke patients show changes similar to subarachnoid haemorrhage patients. We will also monitor how much brain damage occurs in both the animals and patients to see whether it is related to any changes in the molecules in the blood. If we see similar changes between animals and patients then this shows that subarachnoid haemorrhage patients can be used to study stroke and to test new treatments.