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ECB-ART-44243
Food Funct 2015 Dec 01;612:3652-62. doi: 10.1039/c5fo00478k.
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EPA-enriched phospholipids ameliorate cancer-associated cachexia mainly via inhibiting lipolysis.

Du L , Yang YH , Wang YM , Xue CH , Kurihara H , Takahashi K .


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Excessive loss of fat mass is considered as a key feature of body weight loss in cancer-associated cachexia (CAC). It affects the efficacy and tolerability of cancer therapy and reduces the quality and length of cancer patients'' lives. The aim of the present study was to evaluate the effects of EPA-enriched phospholipids (EPA-PL) derived from starfish Asterias amurensis on cachectic weight loss in mice bearing S180 ascitic tumor, and TNF-α-stimulated lipolysis in 3T3-L1 adipocytes and to elucidate the possible mechanisms involved. Our findings revealed that oral administration of EPA-PL at 100 mg per kg body weight (BW) per day for 14 days prevented body weight loss in CAC mice by preserving the white adipose tissue (WAT) mass. We found that serum levels of nonesterified fatty acid (NEFA) and pro-inflammatory cytokines such as tumor necrosis factor α (TNF-α) and interleukin (IL)-6 increased in CAC mice but decreased significantly after oral treatment of EPA-PL. In addition, EPA-PL treatment also suppressed the overexpression of several key lipolytic factors and raised the mRNA levels of some adipogenic factors in the WAT of CAC mice. Moreover, treatment of EPA-PL (200 and 400 μM) markedly inhibited TNF-α-stimulated lipolysis in adipocytes. Furthermore, the antilipolytic effects of EPA-PL were stimulated by the extracellular signal-regulated kinase 1/2 (ERK 1/2) inhibitor PD 98059 and blocked via the AMP-activated protein kinase (AMPK) inhibitor compound C and the phosphoinositide-3-kinase (PI3K) inhibitor LY 294002. Taken together, these data suggest that the dietary EPA-PL ameliorates CAC mainly via inhibiting lipolysis and at least in part for recovering the function of adipogenesis.

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Genes referenced: fat4 LOC100888004 LOC586734 LOC586799 LOC588766 LOC590500 LOC756927