JP6596185B2 - 総ケトン体濃度上昇剤、油脂組成物、医薬組成物、食品組成物 - Google Patents
総ケトン体濃度上昇剤、油脂組成物、医薬組成物、食品組成物 Download PDFInfo
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- JP6596185B2 JP6596185B2 JP2019517722A JP2019517722A JP6596185B2 JP 6596185 B2 JP6596185 B2 JP 6596185B2 JP 2019517722 A JP2019517722 A JP 2019517722A JP 2019517722 A JP2019517722 A JP 2019517722A JP 6596185 B2 JP6596185 B2 JP 6596185B2
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Description
本発明の総ケトン体濃度上昇剤は、中鎖脂肪酸を含む。以下、「中鎖脂肪酸」を「MCFA」ともいう。
MCFAは、炭素数6〜12の直鎖飽和脂肪酸であり、通常の食品等(例えば、食用油脂や乳製品等)に含まれる油脂成分である。本発明の総ケトン体濃度上昇剤には、該上昇剤に含まれるMCFAの総量に対して、30質量%以上75質量%以下の炭素数8のMCFAと、0質量%以上25質量%未満の炭素数10のMCFAと、25質量%以上60質量%以下の炭素数12のMCFAと、が含まれる。以下、炭素数8のMCFA、炭素数10のMCFA、炭素数12のMCFAをあわせて「本発明における3種のMCFA」ともいう。
本発明の総ケトン体濃度上昇剤は、脳内の総ケトン体濃度を上昇させることができる。
本発明は、本発明における3種のMCFAを構成脂肪酸として含む油脂を含有する油脂組成物も提供する。具体的には、本発明の油脂組成物に含まれる油脂は、その構成脂肪酸が、該油脂組成物に含まれるMCFAの総量に対して、50質量%以上75質量%以下の炭素数8のMCFAと、0質量%以上25質量%未満の炭素数10のMCFAと、25質量%以上50質量%以下の炭素数12のMCFAと、を含む。好ましくは、本発明の油脂組成物に含まれる油脂は、その構成脂肪酸が、該油脂組成物に含まれるMCFAの総量に対して、50質量%以上75質量%以下の炭素数8のMCFAと、0質量%以上25質量%未満の炭素数10のMCFAと、25質量%以上50質量%以下の炭素数12のMCFAと、からなる(つまり、油脂組成物に含まれる油脂の構成脂肪酸として、上記の量の本発明における3種のMCFA以外の脂肪酸を含まない。)。
本発明の総ケトン体濃度上昇剤及び本発明の油脂組成物は、認知症又は加齢に伴う認知機能低下の治療又は予防に使用される医薬組成物の製造のために適用できる。本発明の総ケトン体濃度上昇剤及び/又は本発明の油脂組成物を含む認知症又は加齢に伴う認知機能低下の治療又は予防に使用される医薬組成物(以下、「本発明の医薬組成物」ともいう。)は、副作用の懸念が少なく、継続投与に適した医薬品として好ましく利用できる。
本発明の総ケトン体濃度上昇剤及び本発明の油脂組成物は、認知症又は加齢に伴う認知機能低下の治療又は予防に使用される食品組成物の製造のために適用できる。本発明の総ケトン体濃度上昇剤及び本発明の油脂組成物の有効成分であるMCFAは、副作用の懸念が少ないだけではなく、食品の風味や嗜好性を損ないにくい。そのため、本発明の総ケトン体濃度上昇剤及び/又は本発明の油脂組成物を含む認知症又は加齢に伴う認知機能低下の治療又は予防に使用される食品組成物(以下、「本発明の食品組成物」ともいう。)は摂食しやすい食品として好ましく利用できる。
実施例及び比較例において用いる油脂を下記のとおり準備した。
トリグリセリドの構成脂肪酸が、オクタン酸(炭素数8のMCFAに相当する。)及びラウリン酸(炭素数12のMCFAに相当する。)からなり、かつ、その質量比がオクタン酸:ラウリン酸=65:35であるMCT(日清オイリオグループ株式会社製造品)を実施例1の油脂として準備した。該油脂は、本発明の総ケトン体濃度上昇剤又は油脂組成物に相当する。
精製ココナッツ油(商品名「日清ココナッツオイル」、日清オイリオグループ株式会社製造品)を比較例1の油脂として準備した。この油脂は、トリグリセリドの構成脂肪酸が、オクタン酸、デカン酸(炭素数10のMCFAに相当する。)、ラウリン酸及びその他の脂肪酸からなり、かつ、その質量比はオクタン酸:デカン酸:ラウリン酸:その他の脂肪酸=8.3:6.4:46.7:38.6である。なお、この油脂についてオクタン酸、デカン酸、及びラウリン酸の合計質量を100とした場合、オクタン酸、デカン酸、及びラウリン酸の質量比は、オクタン酸:デカン酸:ラウリン酸=14:10:76である。
トリグリセリドの構成脂肪酸が、オクタン酸のみであるMCT(日清オイリオグループ株式会社製造品)を比較例2の油脂として準備した。
トリグリセリドの構成脂肪酸が、オクタン酸(炭素数8のMCFAに相当する。)、デカン酸(炭素数10のMCFAに相当する。)、及びラウリン酸(炭素数12のMCFAに相当する。)からなり、かつ、その質量比がオクタン酸:デカン酸:ラウリン酸=40:25:35であるMCT(日清オイリオグループ株式会社製造品)を比較例3の油脂として準備した。
試験には、7週齢のSprague−Dawley系雄性ラット(日本クレア株式会社)を用いた。ラットを個別飼育ケージに入れ、室温23±1℃、相対湿度50±5%、12時間サイクルで明暗の切り換えを行う飼育室にて飼育した。水及び飼料(商品名「CE−2」、日本クレア株式会社)は自由摂取とした。
(1)実施例1の油脂を摂取させる群
(2)比較例1の油脂を摂取させる群
(3)比較例2の油脂を摂取させる群
試験には、7週齢のSprague−Dawley系雄性ラット(日本クレア株式会社)を用いた。ラットを個別飼育ケージに入れ、室温23±1℃、相対湿度50±5%、12時間サイクルで明暗の切り換えを行う飼育室にて飼育した。水及び飼料(商品名「CE−2」、日本クレア株式会社)は自由摂取とした。
(1)実施例1の油脂を摂取させる群
(2)比較例1の油脂を摂取させる群
(3)比較例2の油脂を摂取させる群
(4)比較例3の油脂を摂取させる群
上記で得られた海馬試料中の総ケトン体濃度(つまり、アセト酢酸、及び3−ヒドロキシ酪酸の総濃度)を、キット(商品名「オートワコー 総ケトン体」、和光純薬工業株式会社)を用いて、測定した。<ラットへの油脂の投与試験−1>の結果を図1に示し、<ラットへの油脂の投与試験−2>の結果を図2に示す。なお、図中、総ケトン体濃度は、各群の平均値を表した。
本発明の食品組成物をゲル状組成物として調製するために、後述する原材料を用いて、下記の方法を実施した。まず、水に油脂以外の原料を分散させた後、ゲル化剤の溶解温度(90℃)まで昇温して原料を混合溶解し、均一な溶液を得た。次いで、該溶液に油脂を投入してミキサー(ホモジナイザー等でもよい。)で乳化を行い、水中油型乳化物を得た。その後、得られた水中油型乳化物(1400g)をゲル化剤の凝固温度以上に保持しながらアルミパウチ袋に15gずつ充填し、密封した後、冷却してゲル化させ、ゲル状組成物を得た。なお、該ゲル状組成物を殺菌する場合は、容器に充填後、密封して加熱殺菌する方法、加熱殺菌しながら容器に充填する方法、充填前に加熱殺菌し、その後無菌充填する方法等のいずれも使用可能だった。
油脂(40質量%):トリグリセリドの構成脂肪酸が、オクタン酸(炭素数8のMCFAに相当する。)及びラウリン酸(炭素数12のMCFAに相当する。)からなり、かつ、その質量比がオクタン酸:ラウリン酸=65:35であるMCT(日清オイリオグループ株式会社製造品)を油脂として準備した。該油脂は、本発明の総ケトン体濃度上昇剤又は油脂組成物に相当する。
乳化剤(1.5質量%):グリセリン脂肪酸エステル、商品名「ポエムJ−0081HV」、理研ビタミン(株)製
ゲル化剤−1(0.3質量%):カラギーナン、商品名「GENUGEL WG−108」、三晶(株)製
ゲル化剤−2(0.3質量%):キサンタンガム、商品名「エコーガム」、DSP五協フード&ケミカル(株)製
ゲル化剤−3(0.3質量%):寒天、商品名「伊那寒天S−6」、伊那食品工業(株)製
ゲル化剤−4(0.5質量%):ローカストビーンガム、商品名「メイプロディン 200」、三晶(株)製
クエン酸(0.2質量%):商品名「クエン酸(無水)」、扶桑化学工業(株)製
ヨーグルトフレーバー(0.2質量%):商品名「HL01043」、小川香料(株)製
甘味料(0.2質量%):商品名「プレジロン SU−10」、ツルヤ化成工業(株)製
水(56.5質量%)
Claims (5)
- 中鎖脂肪酸の総量に対して、60質量%以上70質量%以下の炭素数8の中鎖脂肪酸と、0質量%以上10質量%以下の炭素数10の中鎖脂肪酸と、30質量%以上40質量%以下の炭素数12の中鎖脂肪酸と、を含む、総ケトン体濃度上昇剤。
- 脳内の総ケトン体濃度を上昇させる、請求項1に記載の総ケトン体濃度上昇剤。
- 前記中鎖脂肪酸として、中鎖脂肪酸トリグリセリドを含む、請求項1又は2に記載の総ケトン体濃度上昇剤。
- 請求項1から3のいずれかに記載の総ケトン体濃度上昇剤を含む、認知症又は加齢に伴う認知機能低下の治療又は予防用の医薬組成物。
- 請求項1から3のいずれかに記載の総ケトン体濃度上昇剤を含む、認知症又は加齢に伴う認知機能低下の治療又は予防用の食品組成物。
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