Gastric cancer has one of the highest cancer mortality rates worldwide, largely because of di fficulties in early-stage detection. Aberrant glycosylation in serum proteins is related with many human diseases including inflammation and various types of cancer. Aberrant glycosylation is desirable in order to improve the specificity and sensitivity for clinical use. Here, we combined protein-specific immunoaffinity purification, glycan release, and MS analysis to examine haptoglobin glycosylation of gastric cancer patients for glyco-markers. Interestingly, abundances of several tri- and tetra-antennary fucosylated N-glycans were increased in gastric cancer patients. Additionally, structural analysis via LC/MS/MS demonstrated that the fucosylated complex type N-glycans were mainly decorated with antenna fucose. In this study, we developed a targeted glycoproteomic approach using chip-based nano LC-QTOF MS and MS/MS following antibody-assisted targeted purification to discover glycan signatures of serum haptoglobin for gastric cancer. We could further obtain a specific structure of fucosylated molecules that are potential glyco-markers for gastric cancer via LC/MS/MS. The current study demonstrates that glycomic profiling of targeted serum haptoglobin via LC/MS and LC/MS/MS may be used as a powerful platform to monitor the specific glycosylation associated with gastric cancer.
저자
Su Hee Kim [ 1: GLYCAN Co., Ltd., Healthcare Innovation Park, 172 Dolma-ro, Bundang-gu, Seongnam 13605, Korea ]
Sung Hyeon Lee [ 1: GLYCAN Co., Ltd., Healthcare Innovation Park, 172 Dolma-ro, Bundang-gu, Seongnam 13605, Korea ]
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.