JP6383717B2 - 乳酸菌のフリーズドライのための凍結保護剤 - Google Patents
乳酸菌のフリーズドライのための凍結保護剤 Download PDFInfo
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- JP6383717B2 JP6383717B2 JP2015230302A JP2015230302A JP6383717B2 JP 6383717 B2 JP6383717 B2 JP 6383717B2 JP 2015230302 A JP2015230302 A JP 2015230302A JP 2015230302 A JP2015230302 A JP 2015230302A JP 6383717 B2 JP6383717 B2 JP 6383717B2
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Description
本発明はフリーズドライしたバクテリア、特に乳酸菌の生産の分野である。より詳細には本発明は、フリーズドライ後のバクテリアの生育能を上げ、容易な粉砕のために凍結乾燥したケークのテクスチャーを改善し、そしてフリーズドライしたバクテリアの種々の温度条件での長期安定性を改善するために、凍結保護剤の新規な組み合わせ物の使用に関する。さらに本発明は、そのようにフリーズドライしたバクテリアを食品産業またはヒトもしくは動物の健康への応用に使用することに関する。より詳細には本発明は、異種タンパク質またはペプチドを発現することができ、そしてヒトもしくは動物に治療もしくはワクチン接種の目的で投与される組換えバクテリアの生存能および長期貯蔵の上昇に関する。
ラクティス(L.lactis)は、生物学的に活性なポリペプチドの治療的送達のための好適な微生物として選択された。明らかに操作されたL.ラクティス株による経口治療用タンパク質の送達概念は、刺激的な可能性を開く。しかし製薬学的製品に必要な特性は、典型的には予め定めた貯蔵条件下で少なくとも24ケ月の長期安定性(貯蔵寿命)である。このために、効率的で、測定でき、そして信頼性のある製造プラットホームが、操作されたL.ラクティスに基づく薬物(DS:Drug Substance)および薬剤(DP:Drug Product)配合物に開発される必要がある。
の塩を含む)から選択される安定化増強剤の存在下でフリーズドライされる。そのようなミルク成分は安定化された乾燥バクテリア組成物の重要な構成成分である。
本発明は、フリーズドライした乳酸菌(LAB)の種々の温度での長期安定性を達成するために、スキムミルクまたは任意の他の動物由来化合物を含まない効果的な凍結保護剤組成物の知見および開発を含んでなり、これによりフリーズドライしたLABの生育能の保持は、貯蔵6カ月後、好ましくは貯蔵9カ月後、さらに好ましくは貯蔵12カ月後で50%より高く、好ましくは60%より高く、より好ましくは70%より高く、さらにより一層好ましくは80%より高い。この凍結保護剤組成物配合物の主な利点は、フリーズドライ中、通常の製造操作条件に短期間暴露されている間、および包装後に長期貯蔵されている間に高度に感受性のバクテリアの保護を提供することである。
度条件での長期安定性を改善するための凍結保護剤の新規組み合わせ物の使用に関する。
5.0%〜約30(重量/容量)%;特に約10%〜約20(重量/容量)%;さらに特に約7.5%〜約15(重量/容量)%である。
Applications,Academic Press:San Diego,1990を含む。微生物学の一般原理は例えば、Davis,B.D.et al.,Microbiology,3rd edition,Harper & Row出版社、フィラデルフィア、ペンシルバニア州(1980)に説明されている。
ィノラクティス(Lactococcus raffinolactis)種、およびその任意の亜種および株を含む。
ラクティス(Lactococcus lactis)の亜種ラクティスであり、そして例えばラクトコッカス ラクティス(Lactococcus lactis)の亜種クレモリスSK11またはラクトコッカス ラクティス(Lactococcus lactis)の亜種ラクティスMG1363のようなその任意の株を含む。
reading frame)を含む。
りポリペプチドが個体の体内に特定の効果を達成できると予想される。したがって非ワクチン原性の治療に活性なポリペプチドは、その発現された形態で生物学的に活性であるべきであり、または少なくとも発現している宿主細胞からいったん放出されれば生物学的に活性な形態に転換されなければならない。好ましくは該ポリペプチドのそのような生物学的に活性な形態は、その天然の立体配置(configuration)と同じかまたは極めて類似の2次そして好ましくは3次の立体配座(conformation)を提示することができる。
性なポリペプチドは、ヒトまたは動物個体に治療効果を生じることができる。
MKKKIISAIL MSTVILSAAA PLSGVYA(usp45)をコードする。
1992を参照にされたい)。
きる。後者の場合では、該核酸の単一または複数のコピー、好ましくは単一コピーが組み込まれ、この組み込みは染色体の無作為部位で起こる可能性があり、あるいは上記のように、それらの予め定めた部位、好ましくは例えば好適ではあるが限定するわけではない例としてラクトコッカス(Lactococcus)、例えばラクトコッカス ラクティス(Lactococcus lactis)のthyA座のような予め定めた部位に生じることができる。
用が企図される。
、そして例えば以下の文献に記載されている:Hansel et al.(1990,Pharmaceutical dosage forms and drug delivery systems,5th edition,William and Wilkins);Chien 1992,Novel drug delivery system,2nd edition,M.Dekker);Prescott et al.(1989,Novel drug delivery,J.Wiley & Sons);Cazzaniga et al.,(1994,Oral delayed release system for colonic specific delivery,Int.J.Pharm.iO8:7’)。
でなり、典型的には1グラムの組成物あたり少なくとも10<5> CFU、例えば少なくとも10<6> CFU/gのような、少なくとも10<7> CFU/g、例えば少なくとも10<8> CFU/g、例えば少なくとも10<11> CFU/gのような少なくとも10<10> CFU/g、例えば少なくとも10<12>である生育可能細胞の濃度を有する、凍結し乾燥した、すなわちフリーズドライした濃縮物を含む。組成物はさらなる成分として、酵母エキス、糖およびビタミンのような栄養を含む通常の添加剤を含有することができる。
本発明は、以下に続く実験的詳細を参照にすることにより、より良く理解されるが、当業者はこれから後に続く特許請求の範囲においてさらに完全に記載されるので、これらは本発明の具体的説明だけであると容易に理解するだろう。他の態様、特にラクトコッカス(Lactococcus)種のような他の乳酸菌、例えばラクトバチルス(Lactobacillus)種、ストレプトコッカス(Streptococcus)種、ペティオコッカス(Pediococcus)種、ビフィドバクテリウム(Bifidobacterium)種およびロイコノストック(Leuconostoc)種、および当該技術分野でそのような分類に属する任意の分類群(例えば種、亜種、株)を含んでなる態様がこれらの実施例に照らして当業者により行われるだろう。
L.ラクティスsAGX0037株を5リットルの発酵槽で増殖させ、800μMのチミジンを含有する精製水で2回洗浄し、そして10倍に濃縮した。濃縮したバクテリアを1:1の容量比で凍結保護剤混合物(1mlのサンプル+1mlの凍結保護剤)と混合した。生じた配合物を2mlの容量で35個のバイアルに分けた。バイオリアクターからバイアルまでの全工程に約8時間かかり、この間、温度は平均10℃であった。最終濃度が様々な配合物(すなわちバクテリアを含む)は、表1に示す。バイアルはそれらをフリーズドライヤーに配置するまで、固形CO2ペレット中で凍結させた。
を模したもの[例えばカプセルの充填])に暴露した後、3つのバイアルをフリーズドライ直後および25℃および35%RHで24時間貯蔵した後、生育可能な細胞数について分析した。
L.ラクティスsAGX0037株のプレカルチャー(100ml)を、5リットルのM17c培地(組成は表2に列挙する)を含有する7リットルのContinuously Stirred Tank Reactor(CSTR)に接種するために使用した。
了した時に発酵槽を4℃に冷却することにより停止した。「発酵の終了」のサンプルを取り、そして乾燥細胞重量(DCW)の測定に使用した。いったん発酵が終了すれば、3.5リットルの発酵ブロスを濃縮し、そして限外濾過/膜分離法により1400cm2 500kDaの中空ファイバーフィルターを使用して洗浄した。
L.ラクティスsAGX0037株のプレカルチャー(100ml)は、5リットルのM17c培地(組成は上記表2に列挙する)を含有する7リットルのCSTRに接種するために使用した。バイオリアクターは30℃およびpH7(5MのNH4OHの添加による)を維持するように設定した。撹拌速度は200rpmに設定した。発酵はグルコース濃度が0.5g/リットル未満に落ちた時、発酵槽を4℃に冷却することにより停止した。「発酵の終了」のサンプルを取り、そしてDCW測定に使用した。いったん発酵が終了すれば、3.5リットルの発酵ブロスを濃縮し、そして限外濾過/膜分離法により1400cm2 500kDの中空ファイバーフィルターを使用して洗浄した。
L.ラクティスsAGX0037株の200リットル規模の工業的発酵後、蓄積したバイオマスを濃縮し、そして精製水で限外濾過/膜分離法によりそれぞれ洗浄した。膜分離は乳酸塩濃度がいったん5g/リットル(55ミリモル/リットル)未満に達したら停止した。限外濾過および膜分離中、容器のジャケットは4℃に水冷した。
Claims (20)
- 治療用異種ポリペプチドを発現するラクトコッカス種(Lactococcus sp.)菌集団の生存能をフリーズドライ後に増加させる方法であって、治療用異種ポリペプチドを発現するラクトコッカス種菌を安定化組成物と共にフリーズドライすることを含み、前記安定化組成物は動物由来生成物を含まず、
(a)デキストランおよびデキストリンから選択される澱粉加水分解物
(b)グルタミン酸塩、および
(c)ソルビトールおよびマンニトールから選択されるポリオール
を含み、
ここで、前記ラクトコッカス種菌の生存能は5℃以下での貯蔵6カ月後で80%より高く、フリーズドライ前の乳酸菌と安定化組成物の混合物中の成分(a)〜(c)の合計は27.5%w/v以下である、
方法。 - フリーズドライ前の乳酸菌と安定化組成物の混合物中の、澱粉加水分解物は5%w/v以下、グルタミン酸塩は7.5%w/v以下、および、ポリオールは15%w/v以下である、請求項1に記載の方法。
- ラクトコッカス種菌の生存能が、5℃以下での貯蔵6カ月後で90%より高い、請求項1〜2のいずれか1項に記載の方法。
- ラクトコッカス種菌の生存能が、5℃以下での貯蔵9カ月後で90%より高い、請求項1〜2のいずれか1項に記載の方法。
- ラクトコッカス種菌の生存能が、5℃以下での貯蔵12カ月後で90%より高い、請求項1〜2のいずれか1項に記載の方法。
- ラクトコッカス種菌の生存能が、5℃以下での貯蔵9カ月後で50%より高い、請求項1〜2のいずれか1項に記載の方法。
- ラクトコッカス種菌の生存能が、5℃以下での貯蔵9カ月後で60%より高い、請求項1〜2のいずれか1項に記載の方法。
- ラクトコッカス種菌の生存能が、5℃以下での貯蔵9カ月後で70%より高い、請求項1〜2のいずれか1項に記載の方法。
- ラクトコッカス種菌の生存能が、5℃以下での貯蔵9カ月後で80%より高い、請求項1〜2のいずれか1項に記載の方法。
- ラクトコッカス種菌の生存能が、5℃以下での貯蔵12カ月後で50%より高い、請求項1〜2のいずれか1項に記載の方法。
- ラクトコッカス種菌の生存能が、5℃以下での貯蔵12カ月後で60%より高い、請求項1〜2のいずれか1項に記載の方法。
- ラクトコッカス種菌の生存能が、5℃以下での貯蔵12カ月後で70%より高い、請求項1〜2のいずれか1項に記載の方法。
- ラクトコッカス種菌の生存能が、5℃以下での貯蔵12カ月後で80%より高い、請求項1〜2のいずれか1項に記載の方法。
- 前記外因性の治療用ポリペプチドが、インスリン、成長ホルモン、プロラクチン、カルシトニン、黄体化ホルモン、副甲状腺ホルモン、ソマトスタチン、甲状腺刺激ホルモン、血管作動性腸管ポリペプチド、IL−1、IL−2、IL−3、IL−4、IL−5、IL−6、IL−7、IL−9、IL−10、IL−11、IL−12、IL−13、IL−14〜IL−15、IL16、IL−17、IL−18、IL−19、IL−20、IL−21、IL−22、IL−23、IL−24、IL−25、IL−26、IL−27、IL−28、IL−29、IL−30、IL−31、IL−32、GM−CSF、M−CSF、SCF、IFNs、EPO、G−CSF、LIF、OSM、CNTF、TNFα、TNFβ、CD40、CD27、FASリガンド、繊維芽細胞増殖因子、血小板由来増殖因子、トランスフォーミング増殖因子、神経発育因子、上皮増殖因子、およびインスリン関連サイトカインからなる群から選択される、請求項1〜13のいずれか1項に記載の方法。
- ラクトコッカス種菌が、ラクトコッカス ガルビエ(Lactococcus garvieae)種、ラクトコッカス ラクティス(Lactococcus lactis)種、ラクトコッカス ピシウム(Lactococcus piscium)種、ラクトコッカス プランタルム(Lactococcus plantarum)種、およびラクトコッカス ラフィノラクティス(Lactococcus raffinolactis)種からなる群から選択される、請求項1〜14のいずれか1項に記載の方法。
- ラクトコッカス ラクティス(Lactococcus lactis)種が、ラクトコッカス ラクティス(Lactococcus lactis)の亜種クレモリス(cremoris)、ラクトコッカス ラクティス(Lactococcus lactis)の亜種ホールドニアエ(hordniae)、ラクトコッカス ラクティス(Lactococcus lactis)の亜種ラクティス、ラクトコッカス ラクティス(Lactococcus lactis)の亜種 b.v.ジアセチラクティス(diacetylactis)、ラクトコッカス ラクティス(Lactococcus lactis)の亜種クレモリスSK11、およびラクトコッカス ラクティス(Lactococcus lactis)の亜種ラクティスMG1363からなる群から選択される、請求項15に記載の方法。
- ラクトコッカス種菌が、−20℃もしくは5℃で保存される、請求項1〜16のいずれか1項に記載の方法。
- 安定化組成物がミルクを含まない、請求項1〜2のいずれか1項に記載の方法。
- ラクトコッカス種(Lactococcus sp.)菌が2℃〜8℃で保存される、請求項1〜16、18のいずれか1項に記載の方法。
- 記安定化組成物が、
(a)デキストランおよびデキストリンから選択される澱粉加水分解物
(b)グルタミン酸塩、および
(c)ソルビトールおよびマンニトールから選択されるポリオール
からなる、請求項1〜18のいずれか1項に記載の方法。
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