JP6963335B2 - 膜小胞組成物の製造方法 - Google Patents
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Description
細菌及び/又は菌類をアルテピリンCで処理することにより、当該細菌及び/又は菌類の体外の膜上での膜小胞産生を促進することができる。アルテピリンCによる細菌又は菌類の処理は、具体的には例えば、細菌及び/又は菌類とアルテピリンCとを培地中に共存させることにより行うことができる。培地は、例えば、液状、半固形状又は固形状であってよい。アルテピリンCによる細菌及び/又は菌類の処理は、具体的には例えば、生菌体を含む培養液又は固形培地に、アルテピリンCを添加して行うことができる。アルテピリンCによる細菌及び/又は菌類の処理時間は、例えば1分以上であってよく、5分以上、10分以上、15分以上、20分以上、30分以上であってよい。上記処理時間は例えば1時間以下であってよい。
本実施形態に係る製造方法により得られる膜小胞組成物は、細菌及び/又は菌類が産生した膜小胞のみからなるものであってよく、膜小胞の一部の成分を含むものであってもよく、膜小胞又は膜小胞の一部の成分に加えてその他の成分が含まれるものであってもよい。膜小胞組成物は、懸濁液、ペースト、粉末等の形態であってよい。
本実施形態に係る製造方法において細菌及び/又は菌類により産生される膜小胞の大きさは、例えば、10〜600nm、20〜400nm、又は40〜300nmであってよい。膜小胞は、細胞膜により覆われた構造を有する。膜小胞は、例えば、DNA、RNA等の核酸、タンパク質、シグナル物質、病原物質、免疫調節因子、その他の生理活性物質を含んでいてよく、リポ多糖、リポタンパク質、ペプチドグリカン等の、細菌及び/又は菌類の細胞膜又は細胞壁由来の成分を含んでいてもよい。膜小胞は、例えば細菌及び/又は菌類の細胞膜又は外膜由来のものであってよい。
本実施形態に係る膜小胞組成物の製造方法により得られた膜小胞組成物は、医薬品、医薬部外品、化粧品及び/又は食品の成分として、これらの製品の製造に用いることができる。したがって、本発明の一実施形態は、上記膜小胞組成物の製造方法により得られた膜小胞組成物を配合する工程を含む、医薬品、医薬部外品、化粧品及び/又は食品の製造方法を提供する。膜小胞組成物は、必要に応じて、希釈、濃縮、乾燥、加熱等の処理をしたものを上記製品の製造に用いてもよい。
アルテピリンC(プロポリスからの精製品)をDMSOに溶解し、アルテピリンC25μM(7.5μg/mL)溶液を調製した。歯周病原細菌Porphyromonas gingivalis ATCC 33277(ATCCより入手)を、HS−AFM(高速原子間力顕微鏡)観察用にガラススライド上に固定化した。固定化した菌体上にアルテピリンC溶液を滴下することによりアルテピリンC処理を行った。HS−AFM装置(オリンパス社製)を用いて、アルテピリンC処理前後のナノスケールでの細菌菌体の挙動を観察した。アルテピリンC処理前、処理後10分毎(t=10、20、30分)でのHS−AFM像を図1に示す。各像の大きさは、1520nm×1140nm(x×y)の範囲を示す。
大腸菌(Escherichia coli Nissle 1917)、乳酸菌(Lactobacillus kunkeei JCM 16173、Lactobacillus kunkeei BPS402)、ビフィズス菌(Bifidobacterium longum BB536)及び酵母(Saccharomyces cerevisiae バラ蜂蜜由来 d3010)を用いて、アルテピリンCによる膜小胞産生促進作用を確認するための実験を行った。用意した各種菌体をPBSバッファーに懸濁し、菌体を含む液を基板上に添加して室温で10〜30分おき、基板上に菌体を接着させた。基板をPBSバッファーで洗浄した後、各被験物質を基板上に滴下し、室温で2時間反応させた。被験物質としては、DMSO10%水溶液にアルテピリンCを100μM又は1000μMの濃度で溶解した液を用いた。対照として、DMSO10%水溶液を用いた。
Claims (6)
- 細菌及び/又は菌類をアルテピリンCで処理して当該細菌及び/又は菌類に膜小胞を産生させる工程を含み、アルテピリンCで細菌及び/又は菌類を処理する際に、細菌及び/又は菌類を含む培地中にアルテピリンC以外のプロポリス由来成分が共存していない、膜小胞組成物の製造方法。
- 前記細菌及び/又は菌類が、グラム陽性菌、グラム陰性菌及び酵母からなる群から選ばれる少なくとも1つである、請求項1に記載の製造方法。
- 請求項1又は2に記載の製造方法によって膜小胞組成物を得る工程、及び、前記膜小胞組成物を配合する工程を含む、医薬品、医薬部外品、化粧品又は食品の製造方法。
- 請求項1又は2に記載の製造方法によって膜小胞組成物を得る工程、及び、前記膜小胞組成物を含むワクチンの製造方法。
- 免疫力賦活化剤の製造方法であって、
請求項1又は2に記載の製造方法によって細菌及び/又は菌類から膜小胞組成物を得る工程を含み、前記細菌及び/又は菌類が免疫力賦活化作用を有するものであり、前記免疫力賦活化剤が前記膜小胞組成物を有効成分として含む、製造方法。 - アルテピリンCを有効成分とする、細菌及び/又は菌類の膜小胞産生促進剤。
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