Leptin causes vasodilation in humans.

Leptin causes vasodilation in humans.
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瘦素会导致人体血管舒张。

DOI:
10.1291/hypres.25.161
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发表时间:
2002
期刊:
Hypertension research : official journal of the Japanese Society of Hypertension
影响因子:
--
通讯作者:
K. Chayama
K. Chayama
中科院分区:
--
文献类型:
--
作者:
K. Nakagawa;Y. Higashi;S. Sasaki;T. Oshima;H. Matsuura;K. Chayama

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瘦素是ob基因的产物,在调节体脂肪中起重要作用,并被认为引起大鼠血管舒张。这项研究的目的是评估瘦素是否也有血管舒张作用的人。使用应变仪体积描记法,我们评估了10名健康男性(平均年龄23.0+/-1.2岁)在动脉内输注瘦素(1、10或100 ng/kg/min,5 min)时,在不存在和存在一氧化氮合酶抑制剂N(G)-单甲基-L-精氨酸(L-NMMA; 8 μ mol/min,5 min)的情况下前臂血流量(FBF)。瘦素输注显著增加FBF(瘦素1、10和100 ng/kg/min时分别为8.5 ± 3.8、20.3 ± 7.0和17.7 ± 5.4%; p<0.05)和前臂血管阻力(FVR;在1、10和100 ng/kg/min的瘦素下分别为-6.9+/-3.1、-14.6+/-4.3和-13.4+/-3.9%; p<0.05)。在输注瘦素期间,未检测到血压或心率的显著变化。动脉内灌注L-NMMA不改变FBF反应(1、10和100 ng/kg/min瘦素分别为6.6 ± 4.9、22.1 ± 7.5、13.3 ± 3.2%)或FVR反应(在1、10和100 ng/kg/min的瘦素下分别为-4.3+/-4.6、-15.2+/-5.4、-11.1+/-2.5%)。这些结果表明,瘦素本身直接导致血管舒张,瘦素诱导的血管舒张是一氧化氮的独立的健康男性。
Leptin, a product of the ob gene, plays an important role in the regulation of body fat and has been suggested to cause vasodilation in rats. The purpose of this study was to evaluate whether leptin also has a vasodilating effect in humans. Using a strain-gauge plethysmography, we evaluated forearm blood flow (FBF) during intra-arterial infusion of leptin (1, 10 or 100 ng/kg/min for 5 min) in the absence and presence of the nitric oxide synthase inhibitor N(G)-monomethyl-L-arginine (L-NMMA; 8 micromol/min for 5 min) in ten healthy men (mean age, 23.0+/-1.2 years). Leptin infusion significantly increased the FBF (8.5+/-3.8, 20.3+/-7.0 and 17.7+/-5.4% at 1, 10 and 100 ng/kg/min of leptin, respectively; p<0.05) and the forearm vascular resistance (FVR; -6.9+/-3.1, -14.6+/-4.3 and -13.4+/-3.9% at 1, 10 and 100 ng/kg/min of leptin, respectively; p<0.05). No significant changes in blood pressure or heart rate were detected during infusion of leptin. The intra-arterial infusion of L-NMMA did not alter the FBF response (6.6+/-4.9, 22.1+/-7.5, 13.3+/-3.2% at 1, 10 and 100 ng/kg/min of leptin, respectively) or the FVR response (-4.3+/-4.6, -15.2+/-5.4, -11.1+/-2.5% at 1, 10 and 100 ng/kg/min of leptin, respectively) to leptin. These findings suggest that leptin per se directly causes vasodilation and that leptin-induced vasodilatation is nitric oxide-independent in healthy men.
瘦素对正常大鼠胰岛素敏感性的影响。
DOI: 10.1210/endo.138.8.5327
发表时间: 1997
期刊: Endocrinology.
影响因子: --
作者:
Sivitz,WI;Walsh,SA;Morgan,DA;Thomas,MJ;Haynes,WG
通讯作者: Haynes,WG
DOI: 10.1172/jci119532
发表时间: 1997-07-15
影响因子: 15.9
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发表时间: 1998-01-01
期刊: HYPERTENSION
影响因子: 8.3
作者:
Shek, EW;Brands, MW;Hall, JE
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DOI: 10.1126/science.7624777
发表时间: 1995-07-28
期刊: SCIENCE
影响因子: 56.9
作者:
HALAAS, JL;GAJIWALA, KS;FRIEDMAN, JM
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DOI: 10.1056/nejm199602013340503
发表时间: 1996-02-01
影响因子: 158.5
作者:
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通讯作者: Caro, JF