Molecular cloning and analysis of in vivo expression of murine P-selectin.
P-selectin (CD62) is a rapidly inducible cell surface adhesion molecule that is expressed on platelets and endothelial cells and mediates their interaction with leukocytes. In vitro studies have suggested that this receptor may play an important role in hemostasis and in inflammatory response to tissue injury. We report the molecular cloning and sequencing of murine cDNA for P-selectin. The lectin, epidermal growth factor (EGF)-like, transmembrane, and cytoplasmic domains are highly conserved between mouse and human, with an overall amino acid identity of 79%. To further investigate the biology of this adhesion molecule in vivo, we analyzed mRNA levels for P-selectin in mice after injection with endotoxin. Northern blot data indicate that the cellular response in vivo includes a rapid increase in the level of mRNA, presumably for new synthesis of P-selectin. The increase in mRNA is maximal at 4 hours, and turnover is relatively rapid, with levels of RNA having decreased substantially by 6 hours following stimulation with endotoxin. After administration of endotoxin, the highest levels of mRNA expression were detected in liver, lung, kidney, and heart.
Sanders
W E
WE
Baylor College of Medicine, Department of Internal Medicine, Houston, TX 77030.
Wilson
R W
RW
Ballantyne
C M
CM
Beaudet
A L
AL
D016475:3T3 Cells; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015152:Blotting, Northern; D015815:Cell Adhesion Molecules / Q000235:genetics; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics / Q000302:isolation & purification; D015723:Gene Library; D006801:Humans; D008070:Lipopolysaccharides / Q000633:toxicity; D008099:Liver / Q000187:drug effects / Q000502:physiology; D008168:Lung / Q000502:physiology; D051379:Mice; D008969:Molecular Sequence Data; D009838:Oligodeoxyribonucleotides; D009928:Organ Specificity; D019007:P-Selectin; D010980:Platelet Membrane Glycoproteins / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods; D012313:RNA / Q000235:genetics / Q000302:isolation & purification; D012689:Sequence Homology, Nucleic Acid
D015815:Cell Adhesion Molecules; D008070:Lipopolysaccharides; D009838:Oligodeoxyribonucleotides; D019007:P-Selectin; D010980:Platelet Membrane Glycoproteins; D012313:RNA; D004247:DNA