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Updated: Jan 18, 2026

Proteomic Profile of EPS-Urine through FASP Digestion and Data-Independent Analysis
Published on: May 8, 2021
Urine proteome uncovers common mechanisms between mucopolysaccharidosis types I and II
Xiaozhou Yuan1, Donghao Jia2, Gefan Wan2
1Department of Clinical Laboratory, The First Medical Center of PLA General Hospital, Beijing 100853, China; Department of Blood Transfusion, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China.
Background And Aims:
Mucopolysaccharidosis (MPS) types I and II are two types of rare lysosomal storage diseases, which lead to the accumulation of glycosaminoglycans due to the lack of the enzyme alpha-L-iduronidase and iduronate 2-sulfatase respectively. There are some similar pathogenic mechanisms and clinical phenotypes but also some specific minute manifestations between these two subtypes.
Materials And Methods:
We used tandem mass tag mass spectrometry to analyze the differential protein profiles in the urine of MPS I and MPS II patients, and then used parallel reaction monitoring (PRM) to verify our results. We detected the differentially expressed proteins (DEPs) of MPS I and MPS II compared with the control group separately.
Results:
We focused on 227 DEPs which showed consistent changes in the urine of both MPS I and MPS II. PRM analysis verified that up-regulated hexosaminidase B and down-regulated hemoglobin alpha-1 showed significant difference in the urine of both subtypes. In addition, we found 391 DEPs by comparative analysis of MPS I and MPS II proteomes and found that DHRS2 contributed to the difference between the two subtypes by PRM verification.
Conclusion:
We found that the urine of the two subtypes showed up-regulated HEXB and down regulated HBA1, while DHRS2 was significantly different in the urine of the two subtypes.
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