IgA Nephropathy and thin basement membrane nephropathy (TBMN) have identical hematuria symptom but different seriousness. In general, the biopsy of the kidney is performed to distinguish between IgAN and TBMN. There are a lot of needs for clinician to have a sensitive and specific biomarker for diseases diagnosis. Glycosylation is highly sensitive to the biological environment changes and considerably affected by disease states. Glycan is known as playing key roles in cancer metastasis and intracellular recognition. Therefore, the examination of glycosylation change in urinary exosome may be a new way for potential biomarkers to differentiate TBMN and IgAN. In this study, we have analyzed 18 individuals exosomes secreted into urine from renal epithelial cells. Samples were consisted of three different groups, mainly TBMN, IgAN patients, and healthy volunteers. Briefly, N-glycans from urinary exosomes were released by PNGase F digestion and then enriched by solid phase extraction using a porous graphitized carbon cartridge. N-glycans were eluted with three different solution (10% ACN, 20% ACN, 40% ACN with 0.05% TFA in H2O) based on the glycan size and polarity. Enriched glycans were analyzed using MALDI-TOF/TOF mass spectrometry and nanoLCchip/QTOF mass spectrometry for qualitative and quantitative profiling, respectively. We found that high mannose glycans are high in abundance in neutral fractions while complex type glycans consisting of [Hex]n=4-6 [HexNAc]n=4-5[Fuc]n=0-1[NeuAc]1 are high in abundance in acidic fractions.
저자
Nayoung Yun [ Graduate School of Analytical Science Technology, Chungnam National University ]
Seunghyup Jeong [ Graduate School of Analytical Science Technology, Chungnam National University ]
Pyong-Gon Moon [ Department of Molecular Medicine, School of Medicine, Kyungpook National University ]
Moon Chang Baek [ Department of Molecular Medicine, School of Medicine, Kyungpook National University ]
Hyun Joo An [ Graduate School of Analytical Science Technology, Chungnam National University ]
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.