JP2017511322A - Il−15部分とポリマーとのコンジュゲート - Google Patents
Il−15部分とポリマーとのコンジュゲート Download PDFInfo
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- JP2017511322A JP2017511322A JP2016559891A JP2016559891A JP2017511322A JP 2017511322 A JP2017511322 A JP 2017511322A JP 2016559891 A JP2016559891 A JP 2016559891A JP 2016559891 A JP2016559891 A JP 2016559891A JP 2017511322 A JP2017511322 A JP 2017511322A
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- moiety
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- MUPFEKGTMRGPLJ-ZQSKZDJDSA-N raffinose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO[C@@H]2[C@@H]([C@@H](O)[C@@H](O)[C@@H](CO)O2)O)O1 MUPFEKGTMRGPLJ-ZQSKZDJDSA-N 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000006268 reductive amination reaction Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004366 reverse phase liquid chromatography Methods 0.000 description 1
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- 125000006413 ring segment Chemical group 0.000 description 1
- XWGJFPHUCFXLBL-UHFFFAOYSA-M rongalite Chemical compound [Na+].OCS([O-])=O XWGJFPHUCFXLBL-UHFFFAOYSA-M 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000012723 sample buffer Substances 0.000 description 1
- HFHDHCJBZVLPGP-UHFFFAOYSA-N schardinger α-dextrin Chemical compound O1C(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC(C(O)C2O)C(CO)OC2OC(C(C2O)O)C(CO)OC2OC2C(O)C(O)C1OC2CO HFHDHCJBZVLPGP-UHFFFAOYSA-N 0.000 description 1
- CDAISMWEOUEBRE-UHFFFAOYSA-N scyllo-inosotol Natural products OC1C(O)C(O)C(O)C(O)C1O CDAISMWEOUEBRE-UHFFFAOYSA-N 0.000 description 1
- 125000000467 secondary amino group Chemical class [H]N([*:1])[*:2] 0.000 description 1
- 238000013207 serial dilution Methods 0.000 description 1
- 210000002966 serum Anatomy 0.000 description 1
- 230000019491 signal transduction Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000002741 site-directed mutagenesis Methods 0.000 description 1
- 238000001542 size-exclusion chromatography Methods 0.000 description 1
- 208000000587 small cell lung carcinoma Diseases 0.000 description 1
- 239000012279 sodium borohydride Substances 0.000 description 1
- 229910000033 sodium borohydride Inorganic materials 0.000 description 1
- 235000011083 sodium citrates Nutrition 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 description 1
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 description 1
- 235000019254 sodium formate Nutrition 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 229940001584 sodium metabisulfite Drugs 0.000 description 1
- 235000010262 sodium metabisulphite Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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- 150000003431 steroids Chemical class 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 125000005017 substituted alkenyl group Chemical group 0.000 description 1
- 125000004426 substituted alkynyl group Chemical group 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 238000002198 surface plasmon resonance spectroscopy Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 239000003826 tablet Substances 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 230000009261 transgenic effect Effects 0.000 description 1
- YNJBWRMUSHSURL-UHFFFAOYSA-N trichloroacetic acid Chemical compound OC(=O)C(Cl)(Cl)Cl YNJBWRMUSHSURL-UHFFFAOYSA-N 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 210000004881 tumor cell Anatomy 0.000 description 1
- 208000029729 tumor suppressor gene on chromosome 11 Diseases 0.000 description 1
- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 description 1
- 238000005199 ultracentrifugation Methods 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
- 239000004474 valine Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 230000009385 viral infection Effects 0.000 description 1
- 238000000196 viscometry Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000001262 western blot Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
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- A61K47/56—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule
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- A61K47/60—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyureas or polyurethanes the organic macromolecular compound being a polyoxyalkylene oligomer, polymer or dendrimer, e.g. PEG, PPG, PEO or polyglycerol
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- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
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- C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
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Abstract
Description
本願は、米国特許法第119条(e)に基づき、2014年4月3日に出願された米国仮特許出願第61/974,914号明細書に対する優先権の利益を主張するものであり、その開示は参照により本明細書に援用される。
先述のとおり、このコンジュゲートは、水溶性ポリマーと直接、又はスペーサー部分を介して共有結合したIL−15部分の残基を含む。本明細書で使用されるとき、用語「IL−15部分」は、コンジュゲート形成前のIL−15部分、並びに非ペプチド性水溶性ポリマーと結合した後のIL−15部分を指すものとする。しかしながら、本来のIL−15部分が非ペプチド性水溶性ポリマーと結合すると、ポリマーとの連結に伴い1つ又は複数の共有結合が存在するため、IL−15部分は僅かに変化することが理解されるであろう。多くの場合に、この別の分子と結合して僅かに変化した形態のIL−15部分は、IL−15部分の「残基」と称される。
先に考察したとおり、各コンジュゲートは水溶性ポリマーと結合したIL−15部分を含む。水溶性ポリマーに関して、水溶性ポリマーは非ペプチド性で、非毒性であり、天然には存在せず、且つ生体適合性である。生体適合性に関して、物質は、生体組織に関連して物質を単独で、又は別の物質(例えば、IL−15部分などの活性薬剤)と共に使用すること(例えば、患者への投与)に伴う有益な作用が、臨床医、例えば医師が評価するとき、いかなる有害な作用にも勝る場合に、生体適合性であると見なされる。非免疫原性に関して、物質は、生体内での物質の意図される使用によって望ましくない免疫反応(例えば、抗体の形成)が生じることがない場合か、又は、免疫反応が生じる場合にも、かかる反応が、臨床医の評価で臨床的に有意、又は重要とは見なされない場合に、非免疫原性であると見なされる。非ペプチド性水溶性ポリマーは、生体適合性且つ非免疫原性であることが特に好ましい。
HO−CH2CH2O−(CH2CH2O)n−CH2CH2−OH
であり、式中、(n)は典型的には0〜約4,000の範囲である。
−CH2CH2O−(CH2CH2O)n−CH2CH2−
式中、(n)は上記に定義されるとおりである。
CH3O−CH2CH2O−(CH2CH2O)n−CH2CH2−OH
式中、(n)は上記のとおりである。
式中:
polya及びpolybは、メトキシポリ(エチレングリコール)などのPEG骨格であり(いずれも同じか、又は異なる);
R”は、H、メチル又はPEG骨格などの非反応性部分であり;及び
P及びQは、非反応性の連結である。好ましい実施形態において、分枝鎖状PEGポリマーはメトキシポリ(エチレングリコール)二置換リジンである。使用される具体的なIL−15部分によっては、二置換リジンの反応性エステル官能基がさらに修飾され、IL−15部分内の標的基との反応に好適な官能基を形成してもよい。
式中:Xは、1個又は複数の原子のスペーサー部分であり、各Zは、一定長の原子鎖によってCHと連結された活性化末端基である。国際公開第99/45964号パンフレットは、本発明の1つ又は複数の実施形態に用いることが可能な様々なフォーク型PEG構造を開示している。Z官能基を分枝鎖状炭素原子と連結する原子鎖はテザー基として働き、例えば、アルキル鎖、エーテル鎖、エステル鎖、アミド鎖及びそれらの組み合わせを含み得る。
−PEG−CO2−PEG−+H2O→−PEG−CO2H+HO−PEG−
式中:
(n)は、2〜4000の値を有する整数であり;
Xは、スペーサー部分であり;
R1は、有機ラジカルであり;及び
IL−15は、IL−15部分の残基である。
式中、(n)は2〜4000の値を有する整数であり、及びIL−15は、IL−15部分の残基である。
式中、各(n)は、独立して2〜4000の値を有する整数である。
式中:
各(n)は、独立して2〜4000の値を有する整数であり;
Xはスペーサー部分であり;
(b)は、2〜6の値を有する整数であり;
(c)は、2〜6の値を有する整数であり;
R2は、存在するごとに、独立してH又は低級アルキルであり;及び
IL−15は、IL−15部分の残基である。
式中:
各(n)は、独立して2〜4000の値を有する整数であり;及び
IL−15は、IL−15部分の残基である。
式中:
各(n)は、独立して2〜4000の値を有する整数であり;
(a)は、0又は1のいずれかであり;
Xは、存在するとき、1つ又は複数の原子を含むスペーサー部分であり;
(b’)は、0又は1〜10の値を有する整数であり;
(c)は、1〜10の値を有する整数であり;
R2は、存在するごとに、独立してH又は有機ラジカルであり;
R3は、存在するごとに、独立してH又は有機ラジカルであり;及び
IL−15は、IL−15部分の残基である。
式中:
各(n)は、独立して2〜4000の値を有する整数であり;及び
IL−15は、IL−15部分の残基である。
式中:
POLY1は、第1の水溶性ポリマーであり;
POLY2は、第2の水溶性ポリマーであり;
X1は、第1のスペーサー部分であり;
X2は、第2のスペーサー部分であり;
Hαは、イオン化水素原子であり;
R1は、H又は有機ラジカルであり;
R2は、H又は有機ラジカルであり;
(a)は、0又は1のいずれかであり;
(b)は、0又は1のいずれかであり;
Re1は、存在するとき、第1の電子改変基であり;
Re2は、存在するとき、第2の電子改変基であり;及び
(FG)は、活性薬剤のアミノ基と反応してカルバメート連結などの遊離可能な連結を形成することが可能な官能基である。この式中、さらに確定的な構造を有するポリマー試薬が企図される:
式中、POLY1、POLY2、X1、X2、R1、R2、Hα及び(FG)の各々は、先に定義したとおりであり、及びRe1は第1の電子改変基であり;及びRe2は第2の電子改変基である。
式中、各構造について、かつ各例において、(n)は、独立して4〜1500の整数である。
式中:
POLY1は、第1の水溶性ポリマーであり;
POLY2は、第2の水溶性ポリマーであり;
X1は、第1のスペーサー部分であり;
X2は、第2のスペーサー部分であり;
Hαは、イオン化水素原子であり;
R1は、H又は有機ラジカルであり;
R2は、H又は有機ラジカルであり;
(a)は、0又は1のいずれかであり;
(b)は、0又は1のいずれかであり;
Re1は、存在するとき、第1の電子改変基であり;
Re2は、存在するとき、第2の電子改変基であり;
Y1は、O又はSであり;
Y2は、O又はSであり;及び
(IL−15)は、IL−15部分の残基である。
式中、各構造について、かつ各例において、(n)は、独立して4〜1500の整数であり、及びIL−15は、IL−15部分の残基である。
式中、(IL−15)及び隣接するカルボニル基は、カルボキシル含有IL−15部分に対応し、Xは連結鎖、好ましくはO、N(H)、及びSから選択されるヘテロ原子であり、POLYは、場合により末端にエンドキャップ部分を有する、PEGなどの水溶性ポリマーである。
POLY−L0,1−C(O)Z−Y−S−S−(IL−15)
式中、POLYは水溶性ポリマーであり、Lは任意選択のリンカーであり、Zは、O、NH、及びSからなる群から選択されるヘテロ原子であり、Yは、C2〜10アルキル、C2〜10置換アルキル、アリール、及び置換アリールからなる群から選択され、(IL−15)はIL−15部分である。IL−15部分と反応することができ、結果としてこのタイプのコンジュゲートをもたらすポリマー試薬は、米国特許出願公開第2005/0014903号明細書に記載されている。
式中、各(n)は、独立して2〜4000の値を有する整数である。
これにより、以下の構造を有するコンジュゲートが形成される:
式中:
(各構造について)各(n)は、独立して2〜4000の値を有する整数であり;及び
IL−15は、IL−15部分の残基である。
これにより、以下の構造を有するコンジュゲートが形成される:
式中:
(各構造について)(n)は、独立して2〜4000の値を有する整数であり;及び
IL−15は、IL−15部分の残基である。
コンジュゲートは、典型的には組成物の一部である。概して、組成物は複数のコンジュゲートを含み、必須ではないが、好ましくは各コンジュゲートは同じIL−15部分を含む(すなわち、組成物全体のなかに、ただ1つのタイプのIL−15部分が存在する)。加えて、組成物は、任意の所与のコンジュゲートが2つ以上の異なるIL−15部分からなる群から選択されるある部分を含む複数のコンジュゲートを含み得る(すなわち、組成物全体のなかに、2つ以上の異なるIL−15部分が存在する)。しかしながら、最適には、組成物中の実質的に全てのコンジュゲート(例えば、組成物中の複数のコンジュゲートのうちの85%以上)が、各々、同じIL−15部分を含む。
CTLL−2細胞におけるSTAT5リン酸化に基づくrIL−15のIL−15活性の計測
アッセイの前日に、CTLL−2細胞を新鮮成長培地(RPMI 1640+10%FBS+10%T−STIM+2mM L−グルタミン酸塩+1mM ピルビン酸Na)に分けた。アッセイ当日、細胞をアッセイ培地(RPMI 1640+1%FBS+2mM L−グルタミン酸塩+1mM ピルビン酸Na)で少なくとも4時間プレインキュベートし、次にアッセイ培地中50,000細胞/ウェルで96ウェルプレートに入れた。
分枝鎖状mPEG−N−ヒドロキシスクシンイミジル誘導体、20kDaによるrIL−15のペグ化
mPEG2−ru−20K−N−ヒドロキシルスクシンイミジル(Hydroxylsuccinimidyl)誘導体、20kDa(「mPEG2−ru−20K−NHS」)
アルゴン下に−80℃で保存したmPEG2−ru−20K−NHSを、窒素パージ下で周囲温度に加温した。mPEG2−ru−20K−NHSのストック溶液(200mg/mL)を2mM HCl中に調製し、約(abound)5:1〜100:1の範囲のmPEG2−ru−20K−NHS対rIL−15のモル比でmPEG2−ru−20K−NHSをrIL−15に添加した。混合物中のrIL−15の最終濃度は0.5mG/mL(0.031mM)であった。最終濃度が100mMに達するように混合物に重炭酸ナトリウム緩衝液(1M、pH8.0)を添加して、コンジュゲート形成を30分間進行させると、[mPEG2−ru−20K]−[rIL−15]コンジュゲートが得られた。30分後、最終濃度が100mMとなるように反応混合物に1M グリシン(pH6.0)を添加してクエンチを達成した。
mPEG2−C2−fmoc−20K−NHSによるrIL−15のペグ化
mPEG2−C2−fomc−20K−N−ヒドロキシスクシンイミド誘導体、20kDa(「mPEG2−C2−fmoc−20K−NHS」)
アルゴン下に−80℃で保存したmPEG2−C2−fmoc−20K−NHSを、窒素パージ下で周囲温度に加温した。mPEG2−C2−fmoc−20K−NHSのストック溶液(200mg/mL)を2mM HCl中に調製し、5:1〜100:1の範囲のmPEG2−C2−fmoc−20K−NHS対rIL−15のモル比でmPEG2−C2−fmoc−20K−NHSをrIL−15に添加した。混合物中のrIL−15の最終濃度は0.5mg/mL(0.031mM)であった。最終濃度が100mMに達するように混合物に重炭酸ナトリウム緩衝液(1M、pH8.0)を添加して、コンジュゲート形成を30分間進行させると、[mPEG2−C2−fmoc−20K]−[rIL−15]コンジュゲートが得られた。30分後、最終濃度が100mMとなるように反応混合物に1M グリシン(pH6.0)を添加してクエンチを達成した。次にクエンチした反応混合物のpHを氷酢酸を使用して4.0に調整した後、カラムクロマトグラフィー精製及び特徴付けを行った。
mPEG2−CAC−fmoc−20K−NHSによるrIL−15のペグ化
mPEG2−CAC−fmoc−20K−N−ヒドロキシスクシンイミド誘導体、20kDa(「mPEG2−CAC−fmoc−20K−NHS」)
アルゴン下に−80℃で保存したmPEG2−CAC−fmoc−20K−NHSを、窒素パージ下で周囲温度に加温した。mPEG2−CAC−fmoc−20K−NHSのストック溶液(200mg/mL)を2mM HCl中に調製し、5:1〜100:1の範囲のmPEG2−CAC−fmoc−20K−NHS対rIL−15のモル比でmPEG2−CAC−fmoc−20K−NHSをrIL−15に添加した。混合物中のrIL−15の最終濃度は0.5mg/mL(0.031mM)であった。最終濃度が100mMに達するように混合物に重炭酸ナトリウム緩衝液(1M、pH8.0)を添加して、コンジュゲート形成を30分間進行させると、[mPEG2−CAC−fmoc−20K]−[rIL−15]コンジュゲートが得られた。30分後、最終濃度が100mMとなるように反応混合物に1M グリシン(pH6.0)を添加してクエンチを達成した。次にクエンチした反応混合物のpHを氷酢酸を使用して4.0に調整した後、カラムクロマトグラフィー精製及び特徴付けを行った。
分枝鎖状mPEG−N−ヒドロキシスクシンイミジル誘導体、40kDaによるrIL−15のペグ化
mPEG2−ru−40K−N−ヒドロキシルスクシンイミジル(Hydroxylsuccinimidyl)誘導体、40kDa(「mPEG2−ru−40K−NHS」)
アルゴン下に−80℃で保存したmPEG2−ru−40K−NHSを、窒素パージ下で周囲温度に加温した。mPEG2−ru−40K−NHSのストック溶液(200mg/mL)を2mM HCl中に調製し、5:1〜100:1の範囲のモル比でmPEG2−ru−40K−NHSをrIL−15に添加した。混合物中のrIL−15の最終濃度は0.5mg/mL(0.031mM)であった。最終濃度が100mMに達するように混合物に重炭酸ナトリウム緩衝液(1M、pH8.0)を添加して、コンジュゲート形成を30分間進行させると、[mPEG2−ru−40K−]−[rIL−15]コンジュゲートが得られた。30分後、最終濃度が100mMとなるように反応混合物に1M グリシン(pH6.0)を添加してクエンチを達成した。次にクエンチした反応混合物のpHを氷酢酸を使用して4.0に調整した後、カラムクロマトグラフィー精製及び特徴付けを行った。
mPEG2−C2−fmoc−40K−NHSによるrIL−15のペグ化
mPEG2−C2−fomc−40K−N−ヒドロキシスクシンイミド誘導体、40kDa(「mPEG2−C2−fmoc−40K−NHS」)
アルゴン下に−80℃で保存したmPEG2−C2−fmoc−40K−NHSを、窒素パージ下で周囲温度に加温した。mPEG2−C2−fmoc−40K−NHSのストック溶液(200mg/mL)を2mM HCl中に調製し、5:1〜100:1の範囲のmPEG2−C2−fmoc−40K−NHS対rIL−15のモル比でmPEG2−C2−fmoc−40K−NHSをrIL−15に添加した。混合物中のrIL−15の最終濃度は0.5mg/mL(0.031mM)であった。最終濃度が100mMに達するように混合物に重炭酸ナトリウム緩衝液(1M、pH8.0)を添加して、コンジュゲート形成を30分間進行させると、[mPEG2−C2−fmoc−40K]−[rIL−15]コンジュゲートが得られた。30分後、最終濃度が100mMとなるように反応混合物に1M グリシン(pH6.0)を添加してクエンチを達成した。次にクエンチした反応混合物のpHを氷酢酸を使用して4.0に調整した後、カラムクロマトグラフィー精製及び特徴付けを行った。
mPEG2−CAC−fmoc−40K−NHSによるrIL−15のペグ化
mPEG2−CAC−fmoc−40K−N−ヒドロキシスクシンイミド誘導体、40kDa(「mPEG2−CAC−fmoc−40K−NHS」)
アルゴン下に−80℃で保存したmPEG2−CAC−fmoc−40K−NHSを、窒素パージ下で周囲温度に加温した。mPEG2−CAC−fmoc−40K−NHSのストック溶液(200mg/mL)を2mM HCl中に調製し、5:1〜100:1の範囲のmPEG2−CAC−fmoc−40K−NHS対rIL−15のモル比でmPEG2−CAC−fmoc−40K−NHSをrIL−15に添加した。混合物中のrIL−15の最終濃度は0.5mg/mL(0.031mM)であった。最終濃度が100mMに達するように混合物に重炭酸ナトリウム緩衝液(1M、pH8.0)を添加して、コンジュゲート形成を30分間進行させると、[mPEG2−CAC−fmoc−40K]−[rIL−15]コンジュゲートが得られた。30分後、最終濃度が100mMとなるように反応混合物に1M グリシン(pH6.0)を添加してクエンチを達成した。次にクエンチした反応混合物のpHを氷酢酸を使用して4.0に調整した後、カラムクロマトグラフィー精製及び特徴付けを行った。
CTLL−2細胞におけるSTAT5リン酸化に基づくrIL−15コンジュゲートのIL−15活性の計測
アッセイの前日に、CTLL−2細胞を新鮮な成長培地[10%FBS、10%T細胞培養添加物(カタログ番号354115、Corning,Inc.,Tewksbury,MA)、2mM L−グルタミン酸塩、及び1mMピルビン酸ナトリウムを補足したRPMI 1640]に分けた。アッセイ当日、細胞をアッセイ培地(1%FBS、2mM L−グルタミン酸塩、及び1mMピルビン酸ナトリウムを補足したRPMI 1640)で少なくとも4時間プレインキュベートし、次に96ウェルプレート中のアッセイ培地に50,000細胞/ウェルでプレーティングした。アッセイ直前に適切な緩衝液中に被験物質の希釈物を調製した。CTLL−2細胞が入ったトリプリケートウェルに25倍被験物質溶液を移すことにより、CTLL−2細胞の刺激を開始した。プレートを37℃、5%CO2で10分間インキュベートし、細胞溶解によって反応は停止した。MSD Phospho(Tyr694)/Total STATa,b全細胞ライセートキット(カタログ番号K15163D、Meso Scale Diagnostics,LLC、Gaithersburg,MD)を使用して細胞溶解物中のホスホ−STAT5及び総STAT5タンパク質レベルの検出を実施した。10分間の処理後、PeproTechから入手した組換えヒトIL−15(カタログ番号200−15)は、0.063±0.028ng/mLの平均EC50でCTLL−2細胞においてSTAT5リン酸化(phosporylation)を誘導することによりIL−15活性を実証し、これを対照として供した。実施例2、3及び5において調製したコンジュゲートを試験し、10分間の処理後の結果を表4に提供した。
B16F10メラノーマ腫瘍におけるrIL−15コンジュゲートの抗腫瘍活性の評価
インビボモデルにおけるrIL−15コンジュゲートの有効性を試験して比較するため、6〜8週齢雌C57BL/6マウスにおいて、100μL容積の血清不含細胞培養培地中1×106細胞mL−1の密度のマウス転移性B16F10メラノーマ細胞を腹部腹後側に皮下注射することによって同系腫瘍を誘導した。マウスにおいては、6〜8日目の終わりまでに約100mm3の腫瘍が発達した。マウスを6群に分け、各群が10匹の動物からなった。各群には、表5に示すとおり異なる被験物質を割り当てた。
IL−15Rαに対するrIL−15コンジュゲートの受容体親和性
表面プラズモン共鳴(「SPR」)を用いてIL−15及びrIL−15コンジュゲートの親和性を測定した。簡潔に言えば、1:1のNHS:EDC混合物を使用して活性NHSエステルを生じさせることにより、Biacore CM5センサーチップの表面を活性化した。ヤギ抗ヒトFc抗体を10mM酢酸ナトリウム(pH4)中において5分間注入することにより、それを表面に共有結合させた。約8000RUの抗体が表面に結合した。次に残りのNHSエステルをエタノールアミンでクエンチした。
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Claims (18)
- 水溶性ポリマーに共有結合したIL−15部分の残基を含むコンジュゲート。
- 前記水溶性ポリマーに共有結合した前記IL−15部分が、遊離可能な連結を介して共有結合している、請求項1に記載のコンジュゲート。
- 前記水溶性ポリマーに共有結合した前記IL−15部分が、安定な連結を介して共有結合している、請求項1に記載のコンジュゲート。
- 前記水溶性ポリマーが分枝鎖状水溶性ポリマーである、請求項1〜3のいずれか一項に記載のコンジュゲート。
- 前記水溶性ポリマーが、ポリ(アルキレンオキシド)、ポリ(ビニルピロリドン)、ポリ(ビニルアルコール)、ポリオキサゾリン、及びポリ(アクリロイルモルホリン)からなる群から選択されるポリマーである、請求項1〜4のいずれか一項に記載のコンジュゲート。
- 前記水溶性ポリマーがポリ(アルキレンオキシド)である、請求項5に記載のコンジュゲート。
- 前記ポリ(アルキレンオキシド)がポリ(エチレングリコール)である、請求項6に記載のコンジュゲート。
- 前記ポリ(エチレングリコール)が、ヒドロキシ、アルコキシ、置換アルコキシ、アルケノキシ、置換アルケノキシ、アルキノキシ、置換アルキノキシ、アリールオキシ及び置換アリールオキシからなる群から選択されるエンドキャップ部分で末端がキャップされている、請求項7に記載のコンジュゲート。
- 前記水溶性ポリマーが、約500ダルトン〜約100,000ダルトンの範囲の重量平均分子量を有する、請求項1〜7のいずれか一項に記載のコンジュゲート。
- 前記コンジュゲートが、前記IL−15部分の残基のアミン基に共有結合している、請求項1〜10のいずれか一項に記載のコンジュゲート。
- 1個、2個、3個又は4個の水溶性ポリマーが前記IL−15部分の残基に結合している、請求項1〜10のいずれか一項に記載のコンジュゲート。
- 1個、2個又は3個の水溶性ポリマーが前記IL−15部分の残基に結合している、請求項1〜10のいずれか一項に記載のコンジュゲート。
- 1個又は2個の水溶性ポリマーが前記IL−15部分の残基に結合している、請求項1〜10のいずれか一項に記載のコンジュゲート。
- 1個の水溶性ポリマーが前記IL−15部分の残基に結合している、請求項1〜10のいずれか一項に記載のコンジュゲート。
- 水溶性ポリマーに共有結合したIL−15部分の残基を含むコンジュゲートであって、前記水溶性ポリマーが、共有結合する前には、N−ヒドロキシスクシンイミジル基を有するポリマー試薬である、コンジュゲート。
- 請求項1〜15のいずれか一項に記載のコンジュゲートと、薬学的に許容可能な賦形剤とを含む医薬組成物。
- 請求項16に記載の医薬組成物を個人に投与するステップを含む方法。
- コンジュゲート形成条件下で、IL−15部分をポリマー試薬と接触させるステップを含むコンジュゲートの作製方法。
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AU2021258008A1 (en) | 2021-11-25 |
CA2942571C (en) | 2023-09-19 |
MX2021015492A (es) | 2022-02-22 |
AU2015240806A1 (en) | 2016-10-13 |
EP3139947B1 (en) | 2021-05-26 |
EP3919071A1 (en) | 2021-12-08 |
US20170035898A1 (en) | 2017-02-09 |
CN106456716A (zh) | 2017-02-22 |
JP6728055B2 (ja) | 2020-07-22 |
JP2020114875A (ja) | 2020-07-30 |
WO2015153753A3 (en) | 2015-11-26 |
KR102432169B1 (ko) | 2022-08-11 |
CA2942571A1 (en) | 2015-10-08 |
AU2015240806B2 (en) | 2019-09-19 |
EP3139947B8 (en) | 2021-06-30 |
IL248169A0 (en) | 2016-11-30 |
MX2016012908A (es) | 2017-01-11 |
EP3139947A2 (en) | 2017-03-15 |
ES2876433T3 (es) | 2021-11-12 |
EP3139947A4 (en) | 2018-01-17 |
MA39711A (fr) | 2015-10-08 |
KR20170005793A (ko) | 2017-01-16 |
WO2015153753A2 (en) | 2015-10-08 |
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