ラクトフェリン

ラクトフェリン 価格

ラクトフェリン 化学特性,用途語,生産方法

• 外観

  淡赤黄色～黄赤色の結晶性の粉末又は粉末

• 定義

  本品は、ほ乳類の乳から得られる鉄結合糖蛋白質である。

• 溶解性

  水に溶け、エタノール及びアセトンに難溶である。

• 解説

  ラクトフェリンはおもに乳汁中に含まれている分子量約80000の糖タンパク質．乳汁中では鉄イオンと結合しているために赤色に見える．乳汁中以外では哺乳類の涙液，唾液などの分泌液などで見出されている．近年，ラクトフェリンが免疫を活性化させる効果やがん予防効果をもつことで注目されているが，詳しい機構はまだわかっていない．

• 用途

  生体調節機能の研究。

• 化粧品の成分用途

  ヘアコンディショニング剤、皮膚コンディショニング剤

• 使用上の注意

  アルゴン封入

• 説明

  Lactoferrin, a granule-associated glycoprotein, is a cationic protein with a high proportion of arginine and lysine at the N-terminal region, with two glycosylation and several iron-binding sites. Lactoferrin is highly antibacterial against both gram-positive and gram-negative bacteria at concentrations ranging from 3 to 50 μg/ml. It is believed that these lethal effects are due to a direct interaction of lactoferrin with the cell surface and subsequent disruption of normal permeability functions of the membrane, a so-called dissipation of proton motive force action (23). Similarly, expression of an antimicrobial tachyplesin gene from Asian horseshoe crabs led to antibacterial activity against Erwinia spp. in transgenic potato (24).

• 使用

  Lactoferrin was used in the fractionation of lactoperoxidase and lactoferrin from bovine whey using a cation exchange membrane. It was used in the determination of lactoferrin and immunoglobulin G in animal milks by new immunosensors.

• 生物活性

  Lactoferrin is an iron binding protein. It is structurally similar to transferrin, the plasma iron transport protein; but lactoferrin has a much higher affinity for iron (250 fold). It is very abundant in colostrum and small amounts can also be found in tears, saliva, mucous secretions and in the secondary granules of neutrophils. It is made by mucosal epithelium and neutrophils and is released by these cells in response to inflammatory stimuli. Bacterial growth is inhibited by its ability to sequester iron and also permeabilize bacterial cell walls by binding to lipopolysaccharides through its N-terminus. Lactoferrin can inhibit viral infection by binding tightly to the viral envelope protein. This prevents cell-virus fusion by blocking the binding domain. Lactoferrin appears to activate host defense systems in part by stimulating the release of interleukin-8, a neutrophil activator. It may also be involved in antibody and interleukin synthesis, lymphocyte proliferation and complement activation.

ラクトフェリン 生産企業

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146897-68-9, ラクトフェリン キーワード