Short-Term High-Salt Diet Increases Corin Level to Regulate the Salt–Water Balance in Humans and Rodents

Short-Term High-Salt Diet Increases Corin Level to Regulate the Salt–Water Balance in Humans and Rodents
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短期高盐饮食会增加 Corin 水平,以调节人类和啮齿动物的盐水平衡

DOI:
10.1093/ajh/hpx148
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发表时间:
2018-01
期刊:
Am J Hypertens
影响因子:
--
通讯作者:
Mu Jianjun
Mu Jianjun
中科院分区:
其他
文献类型:
--
作者:
Zhang Jiao;Mu Jianjun

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背景 膳食中的钠和钾会影响血压(BP)和肾功能的波动。 Corin 具有将心房钠尿肽原 (pro-ANP) 转化为生物活性 ANP 的酶活性,可调节血压、心脏和肾功能。我们研究了 corin 表达是否对高盐 (HS) 饮食有反应以调节盐和水平衡。 方法 42 名志愿者连续 7 天遵循 3 种连续饮食:低盐 (LS) 饮食(3.0 克/天 NaCl)、HS 饮食(18.0 克/天 NaCl),然后是补充 K+ 的 HS 饮食(HS + K+)(18.0 克/天 NaCl 和 4.5 克/天 KCl)。 结果 HS 饮食中的 Corin 水平高于 LS 和 HS + K+ 饮食,并且与收缩压 (SBP) 以及 24 小时尿 Na+ 和微量白蛋白 (U-mALB) 排泄量呈正相关。在啮齿类动物中,HS饮食中corin的血清和肾脏水平短暂升高,如果HS饮食持续7天则降低。 HS 负荷增加了 SBP、24 小时尿 Na+、U-mALB 排泄以及前蛋白转化酶枯草杆菌蛋白酶/kexin-6 (PCSK6)(一种 corin 激活剂)的表达。在高盐处理的 M1 皮质集合管 (M1-CCD) 细胞中敲除 PCSK6 或 corin 会增加水通道蛋白 2 (AQP2) 和 β-上皮 Na+ 通道 (β-ENaC) 的表达。 结论 短期 HS 可能会诱导肾脏中的 PCSK6-corin-ANP-AQP2/β-ENaC 通路。人类和啮齿动物血清corin水平升高与HS诱导的SBP以及24小时尿Na+和U-mALB排泄呈正相关,这表明corin参与响应HS摄入的盐水平衡。 临床试验注册 公开试验注册号 NCT02915315。
BACKGROUND Dietary sodium and potassium affect the fluctuation in blood pressure (BP) and renal function. Corin, with its enzymatic activity to convert pro-atrial natriuretic peptide (pro-ANP) to biologically active ANP, regulates BP, cardiac, and renal functions. We investigated whether corin expression responds to a high-salt (HS) diet to regulate salt and water balance. METHODS Forty-two volunteers followed 3 sequential diets for 7 days each: a low-salt (LS) diet (3.0 g/day NaCl), a HS diet (18.0 g/day NaCl), followed by an HS diet with K+ supplementation (HS + K+) (18.0 g/day NaCl and 4.5 g/day KCl). RESULTS Corin level was higher with the HS diet than the LS and HS + K+ diets and was positively correlated with systolic BP (SBP) and 24-hour urinary Na+ and microalbumin (U-mALB) excretion. In rodents, serum and renal levels of corin were transiently increased with the HS diet and were decreased if the HS diet was continued for up to 7 days. HS loading increased SBP, 24-hour urinary Na+, U-mALB excretion, and the expression of proprotein convertase subtilisin/kexin-6 (PCSK6), a corin activator. Knockdown of PCSK6 or corin in high salt-treated M1-cortical collecting duct (M1-CCD) cells increased the expression of aquaporin 2 (AQP2) and β-epithelial Na+ channel (β-ENaC). CONCLUSIONS Short-term HS may induce the PCSK6-corin-ANP-AQP2/β-ENaC pathway in the kidney. Enhanced serum corin level in humans and rodents is positively correlated with HS-induced SBP and 24-hour urinary Na+ and U-mALB excretion, which suggests that corin is involved in the salt-water balance in response to HS intake. CLINICAL TRIALS REGISTRATION Public Trials Registry Number NCT02915315.
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DOI: 10.1080/ac.66.5.2131090
发表时间: 2011-10
期刊: Acta Cardiologica
影响因子: 1.6
作者:
LIU fuqiang
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DOI: 10.1042/cs20160398
发表时间: 2016-09-01
期刊: Clinical science (London, England : 1979)
影响因子: --
作者:
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DOI: 10.1002/oby.21016
发表时间: 2015-04-01
期刊: OBESITY
影响因子: 6.9
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发表时间: 2015-09-01
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