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http://dx.doi.org/10.5483/BMBRep.2014.47.5.193

Increased 26S proteasome non-ATPase regulatory subunit 1 in the aqueous humor of patients with age-related macular degeneration  

Lee, Hyungwoo (Department of Ophthalmology, Konkuk University School of Medicine)
Choi, Ae Jin (Department of Ophthalmology, Konkuk University School of Medicine)
Kang, Gum-Yong (Diatech Korea Co., Ltd.)
Park, Hyung Soon (Diatech Korea Co., Ltd.)
Kim, Hyung Chan (Department of Ophthalmology, Konkuk University School of Medicine)
Lim, Hyunjung Jade (Department of Biomedical Science & Technology, Konkuk University)
Chung, Hyewon (Department of Ophthalmology, Konkuk University School of Medicine)
Publication Information
BMB Reports / v.47, no.5, 2014 , pp. 292-297 More about this Journal
Abstract
Age-related macular degeneration (AMD) is the leading cause of blindness in the world. Evidence indicates that the suppression of the ubiquitin-proteasome system (UPS) contributes to the accumulation of toxic proteins and inflammation in retinal pigment epithelium (RPE), the functional abnormalities and/or the degeneration of which are believed to be the initiators and major pathologies of AMD. To identify new protein associations with the altered UPS in AMD, we used LC-ESI-MS/MS to perform a proteomic analysis of the aqueous humor (AH) of AMD patients and matched control subjects. Six UPS-related proteins were present in the AH of the patients and control subjects. Four of the proteins, including 26S proteasome non-ATPase regulatory subunit 1 (Rpn2), were increased in patients, according to semi-quantitative proteomic profiling. An LC-MRM assay revealed a significant increase of Rpn2 in 15 AMD patients compared to the control subjects, suggesting that this protein could be a biomarker for AMD.
Keywords
Age-related macular degeneration; Aqueous humor; Mass spectrometry; Proteomics; Ubiquitin-proteasome system;
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