With increase of Alzheimer's disease patients, many researchers begin to focus on changes of somatostatin ( SS) in AD and its prevention and treatment, which is important substance of learning and memory as a kind of neurotransmitter in the central nervous system. 随着Alzheimer病(AD)患者的不断增多,作为记忆物质基础之一的神经肽&生长抑素(Somatostatin,SS)在AD患者中的变化,以及有关该疾病防治研究成为国内外众多学者颇为关注的课题。