1
|
Nakao H, Matsumoto S, Nagai Y, Kojima A, Toyoda H, Hashii N, Takakura D, Kawasaki N, Yamaguchi T, Kawabata K, Kawasaki N, Kawasaki T. Characterization of glycoproteins expressing the blood group H type 1 epitope on human induced pluripotent stem (hiPS) cells. Glycoconj J 2016; 34:779-787. [PMID: 27431816 DOI: 10.1007/s10719-016-9710-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 06/23/2016] [Accepted: 06/27/2016] [Indexed: 01/20/2023]
Abstract
Recently, we established two mouse monoclonal antibodies (R-10G and R-17F). The R-17F antibody (IgG1 subtype) exhibited a strong cytotoxic effect on hiPS/ES cells. The R-17F antigen isolated from a total lipid extract of hiPS (Tic) cells was identified as LNFP I (Fucα1-2Galβ1-3GlcNAcβ1-3Galβ1-4Glc). In the present study, R-17F binding proteins were isolated from hiPS (Tic) cell lysates with an affinity column of R-17F. They gave one major R-17F positive band around 250 kDa, and several minor bands between 150 kDa and 25 kDa. The former band was identified as podocalyxin by LC/MS/MS after SDS-PAGE. Hapten inhibition studies on R-17F binding to R-17F column-purified proteins with various synthetic oligosaccharides revealed that the blood group H type 1 triaose structure (Fucα1-2Galβ1-3GlcNAc) was the predominant epitope on all the R-17F binding proteins. These bands disappeared completely on digestion with α1-2 fucosidase, but not with α1-3/4 fucosidase. Upon PNGase F digestion, the R-17F positive band around and above 250 kDa did not show any change, while the minor bands between 150 kDa and 25 kDa disappeared completely, suggesting that the epitope is expressed on N-glycans in the latter and probably on O-glycans in the former. These results, together with those obtained in our previous studies on R-10G (Kawabe et al. Glycobiology, 23, 322-336 (2013)), indicated that both R-10G and R-17F epitopes are carried on the same podocalyxin molecule. The R-17F epitopes on these glycoproteins expressed on hiPS cells could be associated with the molecular mechanism underlying the carbohydrate-mediated cytotoxic activity of R-17F.
Collapse
Affiliation(s)
- Hiromi Nakao
- Research Center for Glycobiotechnology, Ritsumeikan University, Noji-Higashi, 1-1-1, Kusatsu, Shiga, 525-8577, Japan
| | - Shogo Matsumoto
- Research Center for Glycobiotechnology, Ritsumeikan University, Noji-Higashi, 1-1-1, Kusatsu, Shiga, 525-8577, Japan
| | - Yuko Nagai
- Laboratory of Bio-analytical Chemistry, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, 525-8577, Japan
| | - Aya Kojima
- Laboratory of Bio-analytical Chemistry, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, 525-8577, Japan
| | - Hidenao Toyoda
- Laboratory of Bio-analytical Chemistry, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, 525-8577, Japan
| | - Noritaka Hashii
- Division of Biological Chemistry and Biologicals, National Institute of Health Sciences, Tokyo, 158-8501, Japan
| | - Daisuke Takakura
- Division of Biological Chemistry and Biologicals, National Institute of Health Sciences, Tokyo, 158-8501, Japan.,Department of Medical Life Science, Yokohama City University, Kanagawa, 230-0045, Japan
| | - Nana Kawasaki
- Division of Biological Chemistry and Biologicals, National Institute of Health Sciences, Tokyo, 158-8501, Japan.,Department of Medical Life Science, Yokohama City University, Kanagawa, 230-0045, Japan
| | - Tomoko Yamaguchi
- Laboratory of Stem Cell Regulation, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, 567-0085, Japan
| | - Kenji Kawabata
- Laboratory of Stem Cell Regulation, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, 567-0085, Japan
| | - Nobuko Kawasaki
- Research Center for Glycobiotechnology, Ritsumeikan University, Noji-Higashi, 1-1-1, Kusatsu, Shiga, 525-8577, Japan
| | - Toshisuke Kawasaki
- Research Center for Glycobiotechnology, Ritsumeikan University, Noji-Higashi, 1-1-1, Kusatsu, Shiga, 525-8577, Japan.
| |
Collapse
|