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2014 ; 14
(ä): 195
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Astragalus membranaceus up-regulate Cosmc expression and reverse IgA
dys-glycosylation in IgA nephropathy
#MMPMID24942185
Ji L
; Chen X
; Zhong X
; Li Z
; Yang L
; Fan J
; Tang W
; Qin W
BMC Complement Altern Med
2014[Jun]; 14
(ä): 195
PMID24942185
show ga
BACKGROUND: Decreased Core I ?3-Gal-T-specific molecular chaperone (Cosmc)
expression induced IgA1 aberrant glycosylation is the main characteristic of IgA
nephropathy (IgAN). This study tried to elucidate the effect of Astragalus
membranaceus on Cosmc expression and IgA O-glycosylation of peripheral B
lymphocytes in IgAN patients. METHODS: Peripheral B lymphocytes of 21 IgAN
patients and 10 normal controls were isolated and cultured with or without
lipopolysaccharide (LPS) and Astragalus membranaceus injection (AMI). Cosmc mRNA
and protein expression levels were measured by real-time RT-PCR and Western blot.
IgA1 and glycosylation level were determined by enzyme-linked immunosorbent assay
(ELISA) and VV lectin-binding method. RESULTS: Cosmc mRNA expression and IgA1
O-glycosylation level in IgAN patients was significantly lower than normal
controls at baseline. Treatment of LPS could obviously inhibit Cosmc expression
and increase the IgA1 secretion in peripheral B lymphocytes of IgAN patients,
which resulted in a significantly increase in IgA1 aberrant glycosylation level.
Addition of AMI could remarkably up regulated Cosmc expression, decrease IgA1
secretion, and reverse glycosylation level in a dose related manner. CONCLUSION:
AMI can up-regulate Cosmc expression of peripheral B lymphocytes and reverse IgA1
aberrant O-glycosylation level, which might be the underlying mechanism of AMI
therapy in treating IgAN. TRIAL REGISTRATION: TCTR20140515001 (Registration Date:
2014-05-15).