Chem. J. Chinese Universities ›› 2018, Vol. 39 ›› Issue (9): 1904.doi: 10.7503/cjcu20180143

• Analytical Chemistry • Previous Articles     Next Articles

Quali-quantitative Profiling of Mucin-type O-Glycans in Normal and Tumor Cell Lines Based on Oligosaccharide Metabolic Engineering Combined with Mass Spectrometry

YANG Mingming, NAN Lijing, JIN Wanjun, WANG Chengjian, HUANG Linjuan, ZHANG Ying*(), WANG Zhongfu*()   

  1. Key Laboratory for Western China Resource Biology and Biotechnology, Ministry of Education, College of Life Science, Northwest University, Xi’an 710069, China
  • Received:2018-02-21 Online:2018-07-10 Published:2018-07-10
  • Contact: ZHANG Ying,WANG Zhongfu E-mail:zhangying@nwu.edu.cn;wangzhf@nwu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.31670808), the Natural Science Basic Research Program of Shaanxi Province, China(No.2016JQ3018) and the Scientific Research Program Fund for Shannxi Provincial Key Laboratory, China(Nos.16JS109, 14JS101).

Abstract:

The O-glycans on glycoproteins have important biological functions, and their abnormal expressions are closely related to the occurrence and development of several diseases such as tumor. Thus, it is of importance to conduct quali-quantitative profiling of O-glycans expression in normal and disease cells. However, due to the structural complexities and inhomogeneous expression of O-glycans, quali-quantitative analyses of these glycoconjugates still encounter challenges. In this study, based on the oligosaccharide metabolic engineering combined with mass spectrometry, we have profiled and analyzed O-glycans expressed in four tumor cell lines(HeLa, SMMC-7721, HepG2 and MCF-7) and one normal cell lines(L02) quali-quantitatively. The results showed that 19, 11, 6 and 5 O-glycans were observed in four cancer cell lines, HeLa, SMMC-7721, HepG2 and MCF-7 respectively. And 10 O-glycans were detected in one normal cell line(L02). Qualitative and relative quantitative comparison of O-glycans expressed in tumor and normal cell lines showed that three O-glycans(N1, H1N1A1 and H1N1A2) were observed in all cell lines. The number of O-glycans expressed in cancer cell lines is more than those in normal cells. Moreover, these O-glycans were highly fucosylated and sialylated. Further MS/MS data showed that these O-glycans were belonged to Core2 type Mucin O-glycans and their sugar compositions were H3N3F1A2, H4N4F1A2 and H5N5F1A1(fucosylated O-glycans) and H5N4A1, H4N4A2 and H5N5A2(sialylated O-glycans).

Key words: Mucin-type O-glycan, Tumor cell, Normal cell, Oligosaccharides metabolic engineering, Mass Spectrometry

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