Phe-Met-Arg-Phe, amide acetate(64190-70-1 freebase) 剂量依赖性 (ED50=23 nM) 激活肽能尾背神经元中的 K+ 电流。这种肽似乎在大脑的某些区域与神经肽 Y 一起定位。
产品描述
Phe-Met-Arg-Phe, amide acetate dose dependently (ED50=23 nM) activates a K+ current in the peptidergic caudodorsal neurons. This peptide appears to localize with neuropeptide Y in some regions of the brain.
体外活性
In the molluscan central nervous system, Phe-Met-Arg-Phe, amide (FMRFa) acts on K+ channels in sensory, motor-, and neuroendocrine neurones. Phe-Met-Arg-Phe, amide activates a novel K+ current that is characterized by a combined voltage- and receptor-dependent gating mechanism, with both factors being necessary for opening of the channels[1]. Phe-Met-Arg-Phe, amide (1 μM) significantly inhibits glucose stimulated (300 mg/dL) insulin release (p<0.005) and somatostatin release (p<0.01) from the isolated perfused pancreas. Phe-Met-Arg-Phe, amide (FMRF-NH2) (1 and 10 μM) is without effect on glucagon secretion, either in low glucose (50 mg/dL), high glucose (300 mg/dL), or during arginine stimulation (5 mM)[2].
体内活性
Phe-Met-Arg-Phe, amide (FMRFamide) stimulates growth hormone secretion in conscious OVX rats. The presence of Phe-Met-Arg-Phe, amide-like immunoreactivity in neuronal elements in the hypothalamus suggested a role for this in the hypothalamic control of the anterior pituitary function. The injection of 200 ng (313.8 picomoles) of FMRFamide (in 2 uL) produces a significantly increased plasma GH 15 min after injection. The GH-increasing effect of 400-800 ng (627-1255 picomoles) of FMRFamide is already developed after 5 min and lasted up to 30 min[3].
Cas No.
TP1858L
分子式
C31H46N8O6S
分子量
658.82
别名
Phe-Met-Arg-Phe, amide acetate(64190-70-1 freebase);Phe-Met-Arg-Phe, amide acetate
储存和溶解度
DMSO:10 mM
Powder: -20°C for 3 years
In solvent: -80°C for 2 years