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2015 ; 5
(ä): 15171
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Fructose 1,6-bisphosphate, a high-energy intermediate of glycolysis, attenuates
experimental arthritis by activating anti-inflammatory adenosinergic pathway
#MMPMID26478088
Veras FP
; Peres RS
; Saraiva AL
; Pinto LG
; Louzada-Junior P
; Cunha TM
; Paschoal JA
; Cunha FQ
; Alves-Filho JC
Sci Rep
2015[Oct]; 5
(ä): 15171
PMID26478088
show ga
Fructose 1,6-bisphosphate (FBP) is an endogenous intermediate of the glycolytic
pathway. Exogenous administration of FBP has been shown to exert protective
effects in a variety of ischemic injury models, which are attributed to its
ability to sustain glycolysis and increase ATP production. Here, we demonstrated
that a single treatment with FBP markedly attenuated arthritis, assessed by
reduction of articular hyperalgesia, joint swelling, neutrophil infiltration and
production of inflammatory cytokines, TNF and IL-6, while enhancing IL-10
production in two mouse models of arthritis. Our mechanistic studies showed that
FBP reduces joint inflammation through the systemic generation of extracellular
adenosine and subsequent activation of adenosine receptor A2a (A2aR). Moreover,
we showed that FBP-induced adenosine generation requires hydrolysis of
extracellular ATP through the activity of the ectonucleosides triphosphate
diphosphohydrolase-1 (ENTPD1, also known as CD39) and ecto-5'-nucleotidase (E5NT,
also known as CD73). In accordance, inhibition of CD39 and CD73 abolished
anti-arthritic effects of FBP. Taken together, our findings provide a new insight
into the molecular mechanism underlying the anti-inflammatory effect of FBP,
showing that it effectively attenuates experimental arthritis by activating the
anti-inflammatory adenosinergic pathway. Therefore, FBP may represent a new
therapeutic strategy for treatment of rheumatoid arthritis (RA).