| 摘要: | 紫菜 (Porphyra crispata) 經冷凍乾燥及磨粉 (200 mesh) 後，以無水酒精萃取，紫菜酒精萃取物經 Diaion HP-20 樹脂分離後，得glycolipids，再以弱陰離子交換纖維素 (DEAE-cellulose, diethylaminoethyl-cellulose) 分離，經冰丙酮沉澱後，得 SQDG (sulfoquinovosyldiacylglycerol) 純品 ，收率為 0.032 % dry basis。紫菜之 SQDG 主要含 palmitic acid (C16:0, 33.3%)、EPA (C20:5n-3, 30.0%)、arachidonic acid (C20:4n-6, 12.7%)、oleic acid (C18:1n-9, 7.52%) 和 stearic acid (C18:0, 6.83%) 等脂肪酸，不飽和脂肪酸n - 3 / n - 6 比值為 1.9，其抑制人類肝癌腫瘤細胞 (Hep G2) 之半抑制濃度 (IC50 ) 為126 μg /mL，低於菠菜SQDG(255μg / mL)。
A red alga, Porphyra crispata, was extracted with ethanol and purified on a hydrophobic column (Diaion HP-20 column) to obtain sulfoglycolipids (sulfoquinovosyldiacylglycerols, SQDGs). The main fatty acids in SQDGs were palmitic acid (C16:0), 33.3%; EPA (C20:5), 30.0%; arachidonic acid (C20:4), 12.7%; oleic acid (C18:1), 7.52%; and stearic acid (C18:0), 6.83%. The n-3/n-6 ratio was 1.9, whereas the authentic standard, spinach SQDG, did not contain n-3 fatty acids. Sulfoglycolipids inhibited the growth of human hepatocellular carcinoma cell line (HepG2). The IC50 was 126 μg/mL,which is lower than that of the spinach SQDG (255 μg/mL). |
