JP6475853B2 - バシラス属細菌由来の細胞外ベシクルを含む妊娠関連疾患の治療用の組成物 - Google Patents
バシラス属細菌由来の細胞外ベシクルを含む妊娠関連疾患の治療用の組成物 Download PDFInfo
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- JP6475853B2 JP6475853B2 JP2017544611A JP2017544611A JP6475853B2 JP 6475853 B2 JP6475853 B2 JP 6475853B2 JP 2017544611 A JP2017544611 A JP 2017544611A JP 2017544611 A JP2017544611 A JP 2017544611A JP 6475853 B2 JP6475853 B2 JP 6475853B2
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Description
それで、本発明はバシラス属細菌由来の細胞外ベシクルを有効成分として含む、早産または乳がんのような妊娠関連疾患の予防または治療用の薬学的組成物を提供することを目的にする。
しかし、本発明が解決しようとする技術的な課題は以上で言及した課題に制限されなく、言及されていない他の課題は以下の記載から当業者に明確に理解されることができるだろう。
また、本発明はバシラス属細菌由来の細胞外ベシクルを有効成分として含む、正常妊娠誘導用の組成物を提供する。
(A) 妊産婦の尿から分離した細胞外ベシクルから16s rDNAを抽出するステップ;
(B)上記の16s rDNAに対して配列番号1および配列番号2のプライマーペアを用いてPCRを行うステップ;および
(C)上記のPCR産物の配列解析を通して、バシラス属細菌由来の細胞外ベシクルの分布が正常妊産婦に比べて2倍以上低い場合、早産の危険性が高いと判定するステップ。
本発明の一具現例として、上記の(A)ステップで細胞外ベシクルの分離は下記のステップを含むことができる。
(a) 尿を10分ないし30分の間、沸かした後、冷却するステップ;
(b)上記の冷却した産物を遠心分離して上澄み液を得るステップ;および
(c)上記の上澄み液を0.45μmフィルターと0.22μmフィルターで順に濾過するステップ。
本発明の他の具現例で、上記の細胞外ベシクルは平均直径が20〜300nmであることを特徴とする。
また、本発明はバシラス属細菌由来の細胞外ベシクルを有効成分として含む組成物を個体に投与するステップを含む、妊娠関連疾患の予防または治療方法を提供する。
また、本発明はバシラス属細菌由来の細胞外ベシクルの妊娠関連疾患の予防または治療用途を提供する。
また、本発明はバシラス属細菌由来の細胞外ベシクルの早産診断用途を提供する。
本発明で用いられる用語、「予防」とは本発明による薬学的組成物の投与による妊娠関連疾患を抑制させたり、発病を遅延されるすべての行為を意味する。
本発明で用いられる用語、「治療」とは、本発明による薬学的組成物の投与によって妊娠関連疾患による症状が好転したり有利に変更されるすべての行為を意味する。
本発明の上記のバシラス属細菌由来の細胞外ベシクルは自然的に分泌されたり、または人工的に分泌される細胞外ベシクルを含めて、バシラス属細菌の培養液から分離されたり、またはバシラス属細菌で醗酵させた食品から分離されることができる。上記の細菌培養液または上記の細菌添加醗酵食品から細胞外ベシクルを分離する方法は、細胞外ベシクルを含めば、特に制限されなく、たとえば、培養液や醗酵食品から、遠心分離、超高速遠心分離、フィルターによる濾過、ゲルろ過クロマトグラフィー、フリーフロー電気泳動、キャピラリー電気泳動などの方法およびこれらの組み合わせを用いて細胞外ベシクルを分離することができる。または、不純物の除去のための洗浄、得られた細胞外ベシクルの濃縮などの過程を追加に含むことができる。
本発明の実施例では2006年から2008年まで檀国大学校と梨花女子大学校の梨花医療院に登録された73人の非妊産婦と74人の妊産婦(正常分娩39人、早産分娩35人)を対象に研究を行った。檀国大学校の病院で健康診断を受けた非妊産婦を正常対照群に設定し、実験群である74人の妊産婦の中、正常分娩と早産分娩は37週を基準に分類した。病院で分娩した37週未満の早産妊産婦を集め、正常分娩は病院で産前検診を受けた37週以上の妊娠期間を経て分娩した母親を対象にした。妊産婦の登録基準は、単生児であり、妊娠週数が25週間以上42週間未満の場合にし、登録の除外の基準は多生児、死産児、先天性奇形、慢性高血圧、前置胎盤、胎盤早期剥離である場合とした。
尿から細菌由来の細胞外ベシクルが排泄されるかを確認するためにグラム陰性菌である大腸菌(Escherichia coli)、グラム陽性菌である黄色ブドウ球菌(Staphylococcus aureus)から由来する細胞外ベシクルをマウスに筋肉注射で注入して、毎時間ごとに映像を撮影した。
3−1.尿からDNAの分離
正常分娩の妊産婦と早産分娩の妊産婦、非妊産婦の女性の尿内に存在する細胞外ベシクルからDNAを分離した。
各正常対照群および実験群の女性の尿1mlを採取して100℃で15分間沸かした。沸かした尿サンプルを氷に5分間置いてから、10,000gで4℃に20分間遠心分離した。上澄み液は4℃に保管して、分離したDNAはメタゲノム解析を行う前にnano−dropで分離されたDNAの量と質を測定した。
実施例3−1の尿から分離した細胞外ベシクルのDNAでメタゲノム解析を実施した。
*W:AまたはT
実施例3−2の方法で正常対象群である非妊産婦および実験群である正常分娩群と早産分娩群の妊産婦の尿から細胞外ベシクルからDNAを分離してメタゲノム解析を行った。
実施例3−1で正常分娩群と早産分娩群の妊産婦の尿から分離した細菌由来の細胞外ベシクルDNAを実施例3−2の方法でメタゲノム解析を行った。図4に正常分娩群と早産分娩群の妊産婦の尿から分離した細菌由来の細胞外ベシクルの分布を示したし、図5に上記の細胞外ベシクルの分布を要約して示した。また、図6aないし図6dに早産分娩群(緑下線、左側)と正常分娩群(紫下線、右側)の妊産婦の尿から分離した細菌由来の細胞外ベシクルの分布を門(phylum)、綱(class)、目(order)、および科(family)の階級で解析して示した。
上記の結果を通して、早産分娩をした妊産婦より正常分娩をした妊産婦で他の細菌由来の細胞外ベシクルと異なりバシラス細菌由来の細胞外ベシクルが多いことを分かることができた。
Claims (3)
- 下記のステップを含む、早産の判定をする為の方法:
(A)妊産婦の尿から分離した細胞外ベシクルから16s rDNAを抽出するステップ;
(B)前記16s rDNAに対して配列番号1および配列番号2のプライマーペアを用いてPCRを行うステップ;および
(C)前記PCR産物の配列解析を通して、バシラス属細菌由来の細胞外ベシクルの分布が正常妊産婦に比べて2倍以上低い場合、早産の危険性が高いと判定するステップ。 - 前記(A)ステップで細胞外ベシクルの分離は下記のステップを含むことを特徴とする、請求項1に記載の方法。
(a)尿を10分ないし30分の間、沸かした後、冷却するステップ;
(b)前記冷却した産物を遠心分離して上澄み液を得るステップ;および
(c)前記上澄み液を0.45μmフィルターと0.22μmフィルターで順に濾過するステップ。 - 前記細胞外ベシクルは平均直径が20〜300nmであることを特徴とする、請求項1又は2に記載の方法。
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