There are provided a cartilage extract that can be effective even when taken in a small amount and has a clear mechanism of effective action and a method of producing the extract. Provided are an isolated proteoglycan which is derived from a water extract of cartilage of cartilaginous fish and whose main component has a molecular weight of 500 kDa or more; a composition containing the proteoglycan; a pharmaceutical composition containing the proteoglycan as an active ingredient; and a method of producing the proteoglycan, comprising the steps of pulverizing cartilaginous fish-derived cartilage into a pulverized product with an average particle diameter of 100 µm or less, adding water to the pulverized product and extracting water-soluble components from it, separating an aqueous phase that contains the extracted water-soluble components, and adding an alcohol to the aqueous phase to produce a precipitate.
本发明提供了一种即使少量服用也有效的软骨
提取物,该
提取物具有明确的有效作用机理,并提供了一种生产该
提取物的方法。提供了一种分离的蛋白
多糖,该蛋白
多糖来自软骨鱼类软骨的
水提取物,其主要成分的分子量在 500 kDa 或以上;一种含有该蛋白
多糖的组合物;一种含有该蛋白
多糖作为活性成分的药物组合物;以及一种生产蛋白
多糖的方法,包括以下步骤:将来源于软骨鱼的软骨粉碎成平均颗粒直径为100微米或更小的粉碎物;向粉碎物中加
水并从中提取
水溶性成分;分离含有提取的
水溶性成分的
水相;向
水相中加入醇以产生沉淀。