title: A novel strategy for mammalian cell surface glycome profiling using lectin microarray.
abstract: The glycome represents the total set of glycans expressed in a cell. The glycome has been assumed to vary between cell types, stages of development and differentiation, and during malignant transformation. Analysis of the glycome provides a basis for understanding the functions of glycans in these cellular processes. Recently, a technique called lectin microarray was developed for rapid profiling of glycosylation, although its use was mainly restricted to glycoproteins of cell lysates, and thus unable to profile the intact cell surface glycans. Here we report a simple and sensitive procedure based on this technology for direct analysis of the live mammalian cell-surface glycome. Fluorescent-labeled live cells were applied in situ to the established lectin microarray consisting of 43 immobilized lectins with distinctive binding specificities. After washing, bound cells were directly detected by an evanescent-field fluorescence scanner in a liquid phase without fixing and permeabilization. The results obtained by differential profiling of CHO and its glycosylation-defective mutant cells, and splenocytes of wild-type and beta1-3-N-acetylglucosaminyltransferase II knockout mice performed as model experiments agreed well with their glycosylation phenotypes. We also compared cell surface glycans of K562 cells before and after differentiation and found a significant increase in the expression of O-glycans on differentiated cells. These results demonstrate that the technique provides a novel strategy for profiling global changes of the mammalian cell surface glycome.
authors: Research Center for Medical Glycoscience, National Institute of Advanced Industrial Science and Technology, Central 2, 1-1-1 Umezono, Ibaraki 305-8568, Japan. h-tateno@aist.go.jp
authors: Hiroaki
authors: H
authors: Tateno
authors: Noboru
authors: N
authors: Uchiyama
authors: Atsushi
authors: A
authors: Kuno
authors: Akira
authors: A
authors: Togayachi
authors: Takashi
authors: T
authors: Sato
authors: Hisashi
authors: H
authors: Narimatsu
authors: Jun
authors: J
authors: Hirabayashi
mesh_terms: D000818:Animals; D016466:CHO Cells; D002240:Carbohydrate Sequence; D002454:Cell Differentiation / Q000502:physiology; D006224:Cricetinae; D003412:Cricetulus; D006019:Glycolysis; D006031:Glycosylation; D006801:Humans; D020014:K562 Cells; D037102:Lectins; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008969:Molecular Sequence Data; D017351:N-Acetylglucosaminyltransferases / Q000235:genetics / Q000502:physiology; D010641:Phenotype; D011134:Polysaccharides / Q000032:analysis / Q000737:chemistry* / Q000378:metabolism*; D040081:Protein Array Analysis; D012680:Sensitivity and Specificity; D013154:Spleen / Q000166:cytology / Q000378:metabolism
chemical_list: D037102:Lectins; D011134:Polysaccharides; D017351:N-Acetylglucosaminyltransferases