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Phe-Met-Arg-Phe amide trifluoroacetate

CAS No. : 159237-99-7

MCE 国际站：Phe-Met-Arg-Phe amide trifluoroacetate

产品活性：Phe-Met-Arg-Phe amide trifluoroacetate 是一种神经肽，在肽能神经元中激活 K⁺ 电流，ED₅₀ 为 23 nM，这种作用具有剂量依赖性。

研究领域：Membrane Transporter/Ion Channel

作用靶点：Potassium Channel

In Vitro: 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. 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).

In Vivo: 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.

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