Differential expression of two glucuronyltransferases synthesizing HNK-1 carbohydrate epitope in the sublineages of the rat myogenic progenitors.
HNK-1 epitope is a cell-surface carbohydrate mediating various cell-cell or cell-substrate interactions. We found HNK-1 epitope in longitudinally arrayed fibers in the subpopulation of the epaxial myotome, and hypaxial myoblasts migrating into the limb bud in the rat embryo. We next investigated the expression patterns of genes encoding two glucuronyltransferases (GlcAT-P, GlcAT-D) and sulfotransferase (Sul-T), which are required for biosynthesis of HNK-1 epitope. GlcAT-P gene was expressed in the non-migrating longitudinal fibers, whereas GlcAT-D gene was expressed in the migrating myoblasts in the limb bud. Sul-T gene expression was ubiquitously observed in all these myogenic populations. Thus, differential expression of GlcAT genes may relate to the epaxial/hypaxial or migrating/non-migrating myoblast lineages.
Nagase
T
T
Division of Biochemistry and Cellular Biology, National Institute of Neuroscience, National Center of Neurology and Psychiatry, 4-1-1 Ogawahigashi, Kodaira, 187-8502, Tokyo, Japan.
Shimoda
Y
Y
Sanai
Y
Y
Nakamura
S
S
Harii
K
K
Osumi
N
N
D000818:Animals; D018959:CD57 Antigens / Q000096:biosynthesis*; D000939:Epitopes / Q000096:biosynthesis; D018507:Gene Expression Regulation, Developmental; D014453:Glucuronosyltransferase / Q000235:genetics* / Q000378:metabolism; D017403:In Situ Hybridization; D009132:Muscles / Q000196:embryology / Q000201:enzymology / Q000276:immunology; D051381:Rats; D017207:Rats, Sprague-Dawley; D013234:Stem Cells / Q000201:enzymology / Q000276:immunology; D015238:Sulfotransferases / Q000235:genetics; D000097811:Carbohydrate Sulfotransferases
D018959:CD57 Antigens; D000939:Epitopes; D014453:Glucuronosyltransferase; D015238:Sulfotransferases; C499547:Chst10 protein, rat; D000097811:Carbohydrate Sulfotransferases; C109318:HNK-1 sulfotransferase