Enhancement of the small intestinal uptake of phenylalanyl-glycine via a H+/oligopeptide transport system by chemical modification with fatty acids
作者:Takuya Fujita、Yutaka Morishita、Hitomi Ito、Daisuke Kuribayashi、Akira Yamamoto、Shozo Muranishi
DOI:10.1016/s0024-3205(97)00980-6
日期:1997.11
caproic acid to the N-terminal of Phe-Gly. Moreover, C4-Phe-Gly uptake was stimulated by the trans-stimulation effect of some dipeptides and cefadroxil, and was inhibited by other dipeptides and cefadroxil. These results indicate that N-terminal modified Phe-Gly with fatty acids are transported into BBMVs via an oligopeptide transporter. Therefore, chemical modification of dipeptides with fatty acids
使用兔肠刷边界膜囊泡(BBMV)检测了化学修饰的苯丙氨酰甘氨酸(Phe-Gly)与丁酸(C4-Phe-Gly)和己酸(C6-Phe-Gly)的转运特性。在存在向内的H +梯度(内部pH值为7.5,外部pH值为6.0)的情况下,丁酸或己酸与Phe-Gly的N端共价连接,从而大大提高了BBMV对Phe-Gly的吸收。此外,C4-Phe-Gly的摄取受到某些二肽和头孢氨苄的反式刺激作用的刺激,而被其他二肽和头孢氨苄抑制。这些结果表明用脂肪酸的N-末端修饰的Phe-Gly通过寡肽转运蛋白转运到BBMV中。因此,