Cancer is often difficult to achieve early diagnosis, which is, however, a decisive requisite for favorable outcome in cancer treatments. Cancer biomarkers have been sought for several purposes preferably in blood and pinpointing cancer cells-derived aberrant glycoprteins would be a well-grounded approach to cancer biomarker discovery. One of the glycosyltransferases responsible for aberrant glycosylation in cancer is N-acetylglucosaminyltransferase V (GnT-V), which catalyzes an addition of b1,6-Nacetylglucosamine (GlcNAc) to the core N-glycan, and many lines of evidence have demonstrated the role of GnT-V in cancer development. Tissue inhibitor of metalloproteinase (TIMP-1) and protein tyrosine phosphatase kappa (PTPk) were suggested to be involved in cancer malignancy upon aberrantly glycosylation by GnT-V. In addition to GnT-V, several glycosyltransferase co-works to render the altered glycan structures in cancer cells including sialryl Lewis antigen and core-fucosylation, which prompted us to mine serological biomarker candidates in cancer sera. Immunodepleted on an immune-LC column, serological proteins were enriched by carbohydrate beads conjugated with lectins like L-PHA, DSA, E-selectin, AAL, Con-A. The fraction refractive to lectin enrichments was resolved on an SDS-PAGE gel, and fractionated by molecular mass. Both the captured glycoproteins and gel-seperated proteins were tryptic-digested for sequence determination in an LTQ-FTICR mass spectrometer. Candidate proteins showing high sesitivity and specificity during the discovery phase were selected and the panel of biomarker candidates is currently under in depth analyses for validation.
저자
Sun-Hee Kim [ Cancer Biomarkers Development Research Center, Korea Research Institute of Bioscience&Biotechnology (KRIBB) ]
Young-Sam Kim [ Cancer Biomarkers Development Research Center, Korea Research Institute of Bioscience&Biotechnology (KRIBB) ]
Jeong-Heon Ko [ Cancer Biomarkers Development Research Center, Korea Research Institute of Bioscience&Biotechnology (KRIBB) ]
본 학회는 화학, 생화학, 분자생물학, 미생물학, 식품공학, 의학, 약학, 유전공학 및 생물공학, 환경 및 기타 공업 등 전 분야의 탄수화물관련 이론과 기술을 연구 발전시키고 산학협동을 통해 이를 보급하여 국내 관련 산업의 발전 및 국민생활의 과학화에 기여하고자 하며, 이러한 목표와 비젼의 실현을 위해 회원들이 적극적인 참여와 활동을 전개하고자 한다.