髓脂素－Ⅰ为肾脏髓质间质细胞分泌的激素，在肝脏被转化为其活性形式即髓脂素－Ⅱ。髓脂素为一种强有力的降压物质，与升压系统肾素－血管紧张素系统形成一种生物上的“镜影”现象。髓脂素－Ⅱ具有明显的扩血管作用，可抑制交感神经张力，引起利尿、利钠效应，并可抑制中枢神经系统。其可能成为有效的抗高血压药物。 Myelin-I is a hormone secreted by the medullary stromal cells of the kidney and is converted in the liver to the active form of myelin-II. As a potent antihypertensive substance, melanoidin forms a biologically “mirror-image” phenomenon with the renin-angiotensin system of the vasopressor system. Myelin-Ⅱ has a vasodilator effect, can inhibit the sympathetic tone, causing diuretic, sodium effects, and inhibit the central nervous system. It may become an effective antihypertensive drug.