Simmons D L, Walker C, Power C, Pigott R
Imperial Cancer Research Fund, Institute of Molecular Medicine, John Radcliffe Hospital, Headington, Oxford, United Kingdom.
J Exp Med. 1990 Jun 1;171(6):2147-52. doi: 10.1084/jem.171.6.2147.
cDNA clones encoding CD31 have been isolated by transient expression. The sequence of CD31 expressed on human umbilical vein endothelial cells (HUVEC) is identical to that expressed on the monocyte-like cell line HL60. In HUVEC. CD31 is concentrated in regions of cell-cell contacts. CD31 is a member of the Ig superfamily and is most closely related to the carcinoembryonic antigen CEA, consisting of four contiguous C2 domains. The localization of CD31 to regions of cell-cell contacts, and the sequence similarity to CEA, a known intercellular adhesion molecule (ICAM), strongly suggest that CD31 may function as an ICAM, possibly mediating endothelial cell-cell contacts and also promoting interactions between leukocytes and endothelial cells.
通过瞬时表达已分离出编码CD31的cDNA克隆。在人脐静脉内皮细胞(HUVEC)上表达的CD31序列与在单核细胞样细胞系HL60上表达的序列相同。在HUVEC中,CD31集中在细胞间接触区域。CD31是免疫球蛋白超家族的成员,与癌胚抗原CEA关系最为密切,由四个相邻的C2结构域组成。CD31定位于细胞间接触区域,以及与已知的细胞间粘附分子(ICAM)CEA的序列相似性,强烈表明CD31可能作为一种ICAM发挥作用,可能介导内皮细胞间接触,并促进白细胞与内皮细胞之间的相互作用。