Storage of gangliosides GM2 and fucosyl GM1 in the kidney of MCC strain of mastomys (Praomys coucha).
Previously, we histochemically examined the kidney of the MCC strain of mastomys (Praomys coucha) and found the storage of gangliosides. In the present studies, the lipid-bound sialic acid content of gangliosides in the MCC kidney was about 9- to 14-fold higher than that of the control (MWC strain). In the MCC kidney, sialic acids of male gangliosides were composed of N-acetylneuraminic acid at 91.5%; sialic acids of female gangliosides, however, were composed almost entirely of N-glycolylneuraminic acid. TLC of gangliosides showed that the MCC kidney contained four abundant gangliosides (two gangliosides each in males and females). These gangliosides isolated by HPLC were identified to be GM2(NeuAc) and fucosyl GM1(NeuAc) in the male MCC kidney and GM2(NeuGc) and fucosyl GM1(NeuGc) in the female MCC kidney by secondary ion mass spectrometry, TLC/immunostaining and TLC after enzyme treatments. Although the MCC kidney contained control levels of the activities of beta-N-acetylhexosaminidase, alpha-l-fucosidase, N-acetylgalactosaminyltransferase and fucosyltransferase, the activity of beta-galactosidase in the MCC kidney was increased to 400-500% of that in the MWC kidney. Therefore, we discussed the possibility that in the MCC kidney, GM2 was abundantly produced by the effect of increased beta-galactosidase activity.
Takimoto
Kazuhiro
K
Division of Experimental Animal Research, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan. takimoto@nih.go.jp
Kawamura
Nariko
N
Kasama
Takeshi
T
D000818:Animals; D001921:Brain / Q000201:enzymology; D001923:Brain Chemistry; D005227:Fatty Acids / Q000032:analysis; D005260:Female; D005647:Fucosyltransferases / Q000378:metabolism; D005677:G(M1) Ganglioside / Q000031:analogs & derivatives* / Q000032:analysis / Q000378:metabolism; D005678:G(M2) Ganglioside / Q000032:analysis* / Q000378:metabolism; D007668:Kidney / Q000737:chemistry* / Q000201:enzymology; D008099:Liver / Q000737:chemistry; D008297:Male; D051189:Murinae / Q000378:metabolism*; D017350:N-Acetylgalactosaminyltransferases / Q000378:metabolism; D019158:N-Acetylneuraminic Acid / Q000032:analysis; D009438:Neuraminic Acids / Q000032:analysis; D009439:Neuraminidase / Q000378:metabolism; D012727:Sex Characteristics; D012794:Sialic Acids / Q000032:analysis; D018629:Spectrometry, Mass, Secondary Ion; D005644:alpha-L-Fucosidase / Q000378:metabolism; D001616:beta-Galactosidase / Q000378:metabolism; D001619:beta-N-Acetylhexosaminidases / Q000378:metabolism
D005227:Fatty Acids; D009438:Neuraminic Acids; D012794:Sialic Acids; C032592:N-glycolylneuraminic acid; D005678:G(M2) Ganglioside; D005677:G(M1) Ganglioside; C039123:fucosyl GM1 ganglioside; D005647:Fucosyltransferases; D017350:N-Acetylgalactosaminyltransferases; D009439:Neuraminidase; D001616:beta-Galactosidase; D005644:alpha-L-Fucosidase; D001619:beta-N-Acetylhexosaminidases; D019158:N-Acetylneuraminic Acid