During the development of human fetus, all organs consisting of various types of cells are in rapid growth. The significance of these cells and the chemical components involved, especially those of special functions i...During the development of human fetus, all organs consisting of various types of cells are in rapid growth. The significance of these cells and the chemical components involved, especially those of special functions in medical treatment of certain refractory diseases, have been noticed gradually. The questions as a step further are therefore raised, e.g. what is the mechanism underlying the clinical effectiveness and how to produce the active substances in large amount by biological engineering technique or chemical synthetic method, instead of using the crude preparation directly derived from fetus.展开更多
文摘During the development of human fetus, all organs consisting of various types of cells are in rapid growth. The significance of these cells and the chemical components involved, especially those of special functions in medical treatment of certain refractory diseases, have been noticed gradually. The questions as a step further are therefore raised, e.g. what is the mechanism underlying the clinical effectiveness and how to produce the active substances in large amount by biological engineering technique or chemical synthetic method, instead of using the crude preparation directly derived from fetus.
