title: Carbohydrate derivative-functionalized biosensing toward highly sensitive electrochemical detection of cell surface glycan expression as cancer biomarker.
abstract: Accurate and highly sensitive detection of glycan expression on cell surface is extremely important for cancer diagnosis and therapy. Herein, a carbohydrate derivative-functionalized biosensor was developed for electrochemical detection of the expression level of cell surface glycan (mannose used as model). Thiomannosyl dimer was synthesized to design the thiomannosyl-functionalized biosensor by direct and rapid one-step protocols. The biosensing surface-confined mannose could effectively mimic the presentation of cell surface mannose and was responsible for competing with mannose on cancer cells in incubation solution. Greatly enhanced sensitivity was achieved by exploiting the excellent conductivity of multiwalled carbon nanotube/Au nanoparticle (MWNT/AuNP), the amplification effect of MWNTs, and the favorable catalytic ability of horseradish peroxidase (HRP). Using competitive strategy, the developed biosensor exhibits attractive performances for the analysis of mannose expression with rapid response, high sensitivity and accuracy, and possesses great promise for evaluation of cell surface glycan expression by using a greater variety of lectins.
authors.affiliation: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China. Electronic address: zhangxinai@mail.ujs.edu.cn.
authors.forename: Xinai
authors.initials: X
authors.lastname: Zhang
authors.affiliation: School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: Wenjie
authors.initials: W
authors.lastname: Lu
authors.affiliation: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Shen
authors.affiliation: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: Yuxiang
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: En
authors.initials: E
authors.lastname: Han
authors.affiliation: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: Xiaoya
authors.initials: X
authors.lastname: Dong
authors.affiliation: School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.
authors.forename: Jiali
authors.initials: J
authors.lastname: Huang
mesh_terms: D014408:Biomarkers, Tumor / Q000032:analysis; D015374:Biosensing Techniques / Q000379:methods*; D045744:Cell Line, Tumor; D055664:Electrochemical Techniques / Q000379:methods; D006046:Gold / Q000737:chemistry*; D006801:Humans; D008358:Mannose / Q000031:analogs & derivatives* / Q000032:analysis*; D053768:Metal Nanoparticles / Q000737:chemistry / Q000648:ultrastructure; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D009369:Neoplasms / Q000737:chemistry / Q000175:diagnosis*; D011134:Polysaccharides / Q000032:analysis; D013438:Sulfhydryl Compounds / Q000737:chemistry*
chemical_list: D014408:Biomarkers, Tumor; D037742:Nanotubes, Carbon; D011134:Polysaccharides; D013438:Sulfhydryl Compounds; D006046:Gold; D008358:Mannose
keywords: Cancer biomarker; Carbohydrate derivative; Electrochemical biosensor; Glycan expression; Signal amplification