应用Ｎｏｒｔｈｅｒｎ印迹分析技术测定了正常人主动脉平滑肌细胞血小板源性生长因子（ｐｌａｔｅｌｅｔｄｅｒｉｖｅｄｇｒｏｗｔｈｆａｃｔｏｒ，ＰＤＧＦ）及其受体ｍＲＮＡ的表达，以探讨其与动脉粥样硬化（ａｔｈｅｒｏｓｃｌｅｒｏｓｉｓ，Ａｓ）发生的关系。结果显示，正常动脉壁及有脂纹脂斑动脉的正常区ＰＤＧＦ链ｍＲＮＡ仅有微量表达，未检出ＰＤＧＦ受体ｍＲＮＡ的表达；而脂纹脂斑区的ＰＤＧＦＡ链ｍＲＮＡ及ＰＤＧＦβ－受体ｍＲＮＡ表达则显著增高。提示动脉壁ＰＤＧＦＡ链及ＰＤＧＦ受体ｍＲＮＡ表达增高与Ａｓ的发生有关。 Northern blot analysis was used to determine the expression of platelet derived growth factor (PDGF) and its receptor mRNA in normal human aortic smooth muscle cells in order to investigate its relationship with atherosclerosis (As). The results showed that normal PDGF chain mRNA in the normal artery wall and the lipid-stained artery were only slightly expressed, and PDGF receptor mRNA was not detected. The PDGFA chain mRNA and PDGFβ-receptor mRNA The expression was significantly higher. It is suggested that the increase of PDGFA chain and PDGF receptor mRNA in artery wall is related to the occurrence of As.