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Fish Oil Supplementation Reduces Cachexia and Tumor Growth While Improving Renal Function in Tumor-Bearing Rats
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  • 作者:Isabela Coelho (1)
    Fernando Casare (1)
    Danielle C. T. Pequito (1)
    Gina Borghetti (1)
    Ricardo K. Yamazaki (1)
    Gleisson A. P. Brito (1)
    Marcelo Kryczyk (1)
    Luiz Claudio Fernandes (1)
    Terezila M. Coimbra (2)
    Ricardo Fernandez (1) ricfer@ufpr.br
  • 关键词:Fish oil supplementation – ; Fatty acid – ; Renal function – ; Cachexia – ; Glomerular filtration – ; Sodium excretion
  • 刊名:Lipids
  • 出版年:2012
  • 出版时间:November 2012
  • 年:2012
  • 卷:47
  • 期:11
  • 页码:1031-1041
  • 全文大小:534.2 KB
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  • 作者单位:1. Departamento de Fisiologia, Setor de Ci锚ncias Biol贸gicas, Universidade Federal do Paran谩 (UFPR) Centro Polit茅cnico s/n.鈥揓d. das Am茅ricas, Post Box 19031, Curitiba, PR 81531-990, Brazil2. Departamento de Fisiologia鈥揊aculdade de Medicina de Ribeir茫o Preto, Universidade de S茫o Paulo (USP), Ribeir茫o Preto, SP, Brazil
  • ISSN:1558-9307
文摘
The objective of the present work was to study the renal function of healthy and tumor-bearing rats chronically supplemented with fish oil (FO), a source of n-3 polyunsaturated fatty acids. Weanling male rats were divided in two groups, one control (C) and another orally supplemented for 70 days with FO (1 g/kg body weight). After this time, half the animals of each group were injected in the right flank with a suspension of Walker 256 tumor cells (W and WFO). The W group had less proteinemia reflecting cachectic proteolysis, FO reversed this fact. Tumor weight gain was also reduced in WFO. Glomerular filtration rate (GFR) was not different in FO or W compared to C, but was higher in WFO. Renal plasma flow (RPF) was higher in the FO supplemented groups. The W group had lower plasma osmolality than the C group, but FO supplementation resulted in normalization of this parameter. Fractional sodium excretion (FENa+) of FO rats was similar to C. Proximal Na+ reabsorption, evaluated by lithium clearance, was similar among the groups. Urinary thromboxane B2 (TXB2) excretion was lower in the supplemented groups. The number of macrophages in renal tissue was higher in W compared to C rats, but was lower in WFO rats compared to W rats. In conclusion, FO supplementation resulted in less tumor growth and cachexia, and appeared to be renoprotective, as suggested by higher RPF and GFR.

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