Aspirin-induced inhibition of adipogenesis was p53-dependent and associated with inactivation of pentose phosphate pathway.

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Su YF, Yang SH, Lee YH, Wu BC, Huang SC, Liu CM, Chen SL, Pan YF, Chou SS, Chou MY, Yang HW

Aspirin-induced inhibition of adipogenesis was p53-dependent and associated with inactivation of pentose phosphate pathway.

Eur J Pharmacol. 2014 Sep 5;738:101-10. doi: 10.1016/j.ejphar.2014.03.009. Epub 2014 Apr 12.

PubMed ID

24726874 [ View in PubMed

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Abstract

Obesity has become a major public health problem of global significance. Today, aspirin remains the most commonly used medication for the treatment of pyrexia, pain, inflammation and antiplatelet. The present study aims at evaluating the possible existence of a putative p53-dependent pathway underlying the aspirin-induced inhibition of adipogenesis. Cell migration assay was identified by the ability to migrate through Transwell insert. Oil Red O staining was employed to quantify adipose accumulation. The concentration of glucose and triglyceride were measured by using assay kits. The expression levels of several master regulatory molecules controlling various signal pathways were monitored using the immunoblotting techniques. Aspirin significantly inhibited preadipocyte migration and adipose accumulation. The p53-p21 signaling and the expression of differentiation marker glycerol-3-phosphate dehydrogenase were increased in a dose-dependent manner. It indicated that aspirin induced adipocyte differentiation through p53-p21 pathway. The oncogenic ERK 1/2 MAPK signaling was induced, whereas, the expression of adipogenic markers peroxisome proliferator-activated receptor gamma (PPARgamma), adipocyte fatty acid-binding protein (A-FABP) and inflammatory factors cyclooxygenase-2 (Cox-2), tumor necrosis factor alpha (TNFalpha) and inducible nitric oxide synthase (iNOS) were inhibited. Aspirin negatively regulated the pentose phosphate pathway (PPP) by inhibiting the expression of rate-limiting enzyme glucose-6-phosphate dehydrogenase. Knockdown the expression of oncogenic ERK 1/2 MAPK by using 10 muM PD98059 significantly increased triglyceride synthesis, adipose accumulation and activated PPP, however, decreased glucose uptake. Diverted the glucose flux to PPP, rather than increased glucose uptake, was associated with adipogenesis. Down-regulated the expression of tumor suppressor p53 by 10 muM pifithrin-alpha (PFTalpha) alone had no effect on adipose accumulation. However, administration of aspirin accompanied with PFTalpha abolished aspirin-induced inhibition of adipogenesis. We demonstrated that aspirin-induced inhibition of adipogenesis was p53-dependent and associated with inactivation of PPP. Blockade PPP may be a novel strategy for obesity prevention and therapy. Moreover, when use aspirin in therapeutic strategy, the p53 status should be considered.

DrugBank Data that Cites this Article

Drug Targets

Drug	Target	Kind	Organism	Pharmacological Action	Actions
Acetylsalicylic acid	Cellular tumor antigen p53	Protein	Humans	Unknown	Inducer	Details