Energy-dense diets increase FGF23, lead to phosphorus retention and promote vascular calcifications in rats.

Energy-dense diets increase FGF23, lead to phosphorus retention and promote vascular calcifications in rats.
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能量浓密饮食会增加FGF23,导致磷的保留率并促进大鼠的血管钙化。

DOI:
10.1038/srep36881
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发表时间:
2016-11-14
期刊:
影响因子:
4.6
通讯作者:
Lopez I
Lopez I
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Raya AI;Rios R;Pineda C;Rodriguez-Ortiz ME;Diez E;Almaden Y;Muñoz-Castañeda JR;Rodriguez M;Aguilera-Tejero E;Lopez I

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肾功能正常的大鼠(实验1,n = 12)和未肾切除的(1/2Nx)大鼠(实验2,n = 12)被喂食含有正常P(NP)和正常(NF)或高脂肪(HF)的饮食。肾功能完整的大鼠(实验3,n = 12)也喂食高P(HP)的NF或HF饮食。此外,尿毒症 (5/6Nx) 大鼠 (n = 16) 被喂食含有 NF 或 HF 的 HP 饮食。与饲喂 NF 饮食的大鼠相比,饲喂 HF 饮食的大鼠血浆 FGF23 显着升高:实验 1,593±126 vs 157±28 pg/ml(p<0.01);实验2,538 ± 105 vs 250 ± 18 pg/ml (p < 0.05);实验 3,971±118 vs 534±40pg/ml (p<0.01)。与饲喂 NF 饮食的大鼠相比,饲喂 HF 饮食的大鼠表现出磷滞留和肾克洛索(克洛索/肌动蛋白比率)降低:实验 1,0.75±0.06 对比 0.97±0.02(p<0.01);实验2,0.69 ± 0.07 vs 1.12 ± 0.08 (p < 0.01);实验 3,0.57 ± 0.19 与 1.16 ± 0.15 (p < 0.05)。饲喂HF饮食的尿毒症大鼠比饲喂NF饮食的尿毒症大鼠表现出更严重的血管钙化(VC)(主动脉Ca = 6.3 ± 1.4 vs 1.4 ± 0.1 mg/g组织,p< 0.001)。总之,富含能量的饮食会增加血浆 FGF23 水平,FGF23 是心血管发病和死亡的已知危险因素。尽管 FGF23 具有主要的磷酸盐作用,但饲喂 HF 饮食会导致磷滞留,这可能继发于肾 klotho 减少和尿毒症 VC 加重。
Rats with normal renal function (Experiment 1, n = 12) and uninephrectomized (1/2Nx) rats (Experiment 2, n = 12) were fed diets with normal P (NP) and either normal (NF) or high fat (HF). Rats with intact renal function (Experiment 3, n = 12) were also fed NF or HF diets with high P (HP). Additionally, uremic (5/6Nx) rats (n = 16) were fed HP diets with NF or HF. Feeding the HF diets resulted in significant elevation of plasma FGF23 vs rats fed NF diets: Experiment 1, 593 ± 126 vs 157 ± 28 pg/ml (p < 0.01); Experiment 2, 538 ± 105 vs 250 ± 18 pg/ml (p < 0.05); Experiment 3, 971 ± 118 vs 534 ± 40 pg/ml (p < 0.01). Rats fed HF diets showed P retention and decreased renal klotho (ratio klotho/actin) vs rats fed NF diets: Experiment 1, 0.75 ± 0.06 vs 0.97 ± 0.02 (p < 0.01); Experiment 2, 0.69 ± 0.07 vs 1.12 ± 0.08 (p < 0.01); Experiment 3, 0.57 ± 0.19 vs 1.16 ± 0.15 (p < 0.05). Uremic rats fed HF diet showed more severe vascular calcification (VC) than rats fed NF diet (aortic Ca = 6.3 ± 1.4 vs 1.4 ± 0.1 mg/g tissue, p < 0.001). In conclusion, energy-rich diets increased plasma levels of FGF23, a known risk factor of cardiovascular morbidity and mortality. Even though FGF23 has major phosphaturic actions, feeding HF diets resulted in P retention, likely secondary to decreased renal klotho, and aggravated uremic VC.
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