霜桑叶提取物对胰脂肪酶活性抑制作用的研究
详细信息-
摘要: 为发掘霜桑叶中的活性成分,采用分光光度法测定霜桑叶的不同极性提取物对胰脂肪酶的抑制活性;通过酶反应动力学方法确定正己烷提取物对胰脂肪酶的抑制类型,并考察其经人工肠液模拟消化后对胰脂肪酶抑制效果的影响。结果表明,霜桑叶提取物中对胰脂肪酶的抑制活性由强到弱依次是正己烷提取物（半数抑制浓度IC50=1.14 mg/m L）>二氯甲烷提取物（IC50=8.51 mg/m L）>乙酸乙酯提取部位（IC50=13.60 mg/m L）。正己烷提取物对胰脂肪酶的作用类型为非竞争性抑制。体外模拟消化后,正己烷提取物对胰脂肪酶仍有较强的抑制效果,而且抑制率随浓度的升高而增大。由此可见,霜桑叶的正己烷提取物可作为良好的胰脂肪酶抑制剂,具有调节脂质代谢的潜在功效。本研究为进一步以霜桑叶为原料开发降脂、减肥的功能性食品提供了理论依据。
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