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2015 ; 5
(ä): 12144
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Uric Acid Produces an Inflammatory Response through Activation of NF-?B in the
Hypothalamus: Implications for the Pathogenesis of Metabolic Disorders
#MMPMID26179594
Lu W
; Xu Y
; Shao X
; Gao F
; Li Y
; Hu J
; Zuo Z
; Shao X
; Zhou L
; Zhao Y
; Cen X
Sci Rep
2015[Jul]; 5
(ä): 12144
PMID26179594
show ga
Epidemiological studies have shown that an elevated uric acid (UA) level predicts
the development of metabolic syndrome and diabetes; however, there is no direct
evidence of this, and the underlying mechanism remains unclear. Here, we showed
that a high-UA diet triggered the expression of pro-inflammatory cytokines,
activated the NF-?B pathway, and increased gliosis in the hypothalamus.
Intracerebroventricular injection of UA induced hypothalamic inflammation and
reactive gliosis, whereas these effects were markedly ameliorated by the
inhibition of NF-?B. Moreover, magnetic resonance imaging confirmed that
hyperuricemia in rodents and humans was associated with gliosis in the mediobasal
hypothalamus. Importantly, the rats administered UA exhibited dyslipidemia and
glucose intolerance, which were probably mediated by hypothalamic inflammation
and hypothalamic neuroendocrine alterations. These results suggest that UA can
cause hypothalamic inflammation via NF-?B signaling. Our findings provide a
potential therapeutic strategy for UA-induced metabolic disorders.