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2015 ; 4
(ä): 312
Nephropedia Template TP
gab.com Text
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Twit Text #
English Wikipedia
Low-molecular-weight chitosan scavenges methylglyoxal and N
(?)-(carboxyethyl)lysine, the major factors contributing to the pathogenesis of
nephropathy
#MMPMID26155451
Chou CK
; Chen SM
; Li YC
; Huang TC
; Lee JA
Springerplus
2015[]; 4
(ä): 312
PMID26155451
show ga
Methylglyoxal (MG) can cause protein glycation, resulting in cell damage and
dysfunction. Accumulation of MG and its downstream metabolite N
(?)-(carboxyethyl)lysine (CEL) has been identified in several variations of
nephropathy, including diabetic, hypertensive, and gentamicin-induced
nephropathies. In this study, we investigated the effects of low-molecular-weight
chitosan (lmw-chitosan) on MG-induced carbonyl stress in aristolochic
acid-induced nephropathy. We used a buffer to investigate whether MG could be
scavenged by lmw-chitosan in vitro. In addition, we also used a mouse model of
aristolochic acid-induced nephropathy, which exhibits 12-fold greater
accumulation of MG in the kidneys than that found in control animals, to examine
whether lmw-chitosan could decrease MG levels in vivo. Examination of the binding
of lmw-chitosan with MG in vitro demonstrated that the concentration of
lmw-chitosan necessary to achieve 50% inhibition was 4.60 µg mL(-1). Treatment
with lmw-chitosan (500 mg kg(-1) day(-1) orally) for 14 days significantly
decreased renal MG accumulation from 212.86 ± 24.34 to 86.15 ± 33.79 µg g(-1)
protein (p < 0.05) and CEL levels from 4.60 ± 0.27 to 2.84 ± 0.28 µmol µg(-1)
protein (p < 0.05) in the aristolochic acid-induced nephropathy model. These data
suggest that lmw-chitosan might represent a novel treatment modality for
MG-related diseases such as nephropathy.