胃潰瘍是種胃黏膜損傷後的疾病,嚴重的患者甚至會造成消化道出血以及腸胃道穿孔,造成潰瘍的原因很多,包括遺傳、精神因素、感染、壓力、食物以及藥物作用…等,一旦失調都會造成胃黏膜的傷害。臨床上常用的Indomethacin,是種Indol的衍生物,具抗發炎及具止痛效果的NSAIDs (non-steroidal anti-inflammatory drugs)類的藥物,此藥雖然不含固醇類結構,但其藥理機轉會抑制cyclooxygenase (COX)這類的酵素而降低prostaglandin (PGs)的濃度,因此增加5-LOX代謝產物,如leukotriene而導致胃腸道黏膜的損傷。此外,COX被抑制後,胃黏膜分泌黏液能力以及bicarbonate的量會減少,而且減少黏膜層的血流量,造成血管的損傷,白血球的聚積,以及減少細胞的新生與代謝…而導致胃黏膜層的破壞更加嚴重。因此,本次實驗利用Indomethacin這種non-selective COX inhibitor,來誘導大白鼠的胃黏膜損傷模式,並於誘導胃黏膜傷害前以及傷害後給予複方中藥 (烏賊骨、白芍、甘草、砂仁、生薑、甲殼素、紅球薑) ,以三種不同的劑量評估。顯示中、高劑量的複方中藥與Strocaine相互比較下,效果更好。此複方中藥確實保護了胃黏膜,不論給藥前或是給藥後,胃黏模損傷因此獲得改善。
Gastric Ulcer is a kind of disease after gastric mucus damage. Including genetic, mental, infection, stress...may cause disease of Gastric Ulcer. Clinically, we use NSAIDs as a pain relief drug but it will damage the gastric mucus through inhibit COX and decrease the concentration of PGs and increase 5-LOX. In this experiment, we use Indomethacin, a non-selective COX inhibitor, to induce the gastric mucus damage of SD rats. And treat with different concentration of herbal medicine to confirm the treatment and protect function of SD rats.