小肠粘膜是体内更新速度最快的组织,它的生长分化需一些特殊的营养(如谷酰胺)和生长因子(如表皮细胞生长因子,EGF)等的参与。正常血中含有丰富的谷酰胺,它不仅是肠粘膜细胞氧化代谢的最佳能源,也是合成核酸、脂类及其它氨基酸的前体。虽然谷酰胺不属于必需氨基酸,但它却是肠道细胞代谢的必需营养成份。EGF参与肠道细胞的增殖分化,和其它有丝 Small intestine mucosa is the most rapidly renewing tissue in the body, its growth and differentiation require some special nutrition (such as glutamine) and growth factors (such as epidermal growth factor, EGF) and so on. Normal blood is rich in glutamine, which is not only the best source of oxidative metabolism of intestinal mucosal cells, but also the synthesis of nucleic acids, lipids and other amino acid precursors. Although glutamine is not an essential amino acid, it is an essential nutrient for intestinal cell metabolism. EGF is involved in the proliferation and differentiation of intestinal cells, and other filaments