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2017 ; 8
(24
): 38184-38192
Nephropedia Template TP
gab.com Text
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English Wikipedia
Alpha-ketoglutarate (AKG) lowers body weight and affects intestinal innate
immunity through influencing intestinal microbiota
#MMPMID28465471
Chen S
; Bin P
; Ren W
; Gao W
; Liu G
; Yin J
; Duan J
; Li Y
; Yao K
; Huang R
; Tan B
; Yin Y
Oncotarget
2017[Jun]; 8
(24
): 38184-38192
PMID28465471
show ga
Alpha-ketoglutarate (AKG), a precursor of glutamate and a critical intermediate
in the tricarboxylic acid cycle, shows beneficial effects on intestinal function.
However, the influence of AKG on the intestinal innate immune system and
intestinal microbiota is unknown. This study explores the effect of oral AKG
administration in drinking water (10 g/L) on intestinal innate immunity and
intestinal microbiota in a mouse model. Mouse water intake, feed intake and body
weight were recorded throughout the entire experiment. The ileum was collected
for detecting the expression of intestinal proinflammatory cytokines and innate
immune factors by Real-time Polymerase Chain Reaction. Additionally, the ileal
luminal contents and feces were collected for 16S rDNA sequencing to analyze the
microbial composition. The intestinal microbiota in mice was disrupted with an
antibiotic cocktail. The results revealed that AKG supplementation lowered body
weight, promoted ileal expression of mammalian defensins of the alpha subfamily
(such as cryptdins-1, cryptdins-4, and cryptdins-5) while influencing the
intestinal microbial composition (i.e., lowering the Firmicutes to Bacteroidetes
ratio). In the antibiotic-treated mouse model, AKG supplementation failed to
affect mouse body weight and inhibited the expression of cryptdins-1 and
cryptdins-5 in the ileum. We concluded that AKG might affect body weight and
intestinal innate immunity through influencing intestinal microbiota.