JP2017530723A - 樹状細胞の製造方法、これにより製造された樹状細胞及びその用途 - Google Patents
樹状細胞の製造方法、これにより製造された樹状細胞及びその用途 Download PDFInfo
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Abstract
Description
(i)ケモカイン反応性移動能の増加;
(ii)前記樹状細胞を再刺激する際にIL‐12分泌能の増加;
(iii)前記樹状細胞でT細胞を刺激する際にT細胞のINF‐γの分泌能の増加;
(iv)前記樹状細胞でT細胞を刺激する際にT細胞の細胞傷害性の増加;又は
(v)樹状細胞で細胞傷害性Tリンパ球を誘導する際に細胞傷害性Tリンパ球の増加
(vi)樹状細胞と共培養する際に抗原特異的な機能性T細胞の増加
(1)末梢血単核細胞(PBMC)から未成熟樹状細胞の分化(PBMC→imDC)
健康な個体の血液単核細胞に対して、室温のFicoll‐paque Plus(Endotoxin‐free grade)を使用した密度勾配遠心分離(Density gradient Centrifugation)を行って赤血球(reticulocyte)、顆粒球(granulocyte)、血小板(platelet)、血漿などが除去された末梢血単核細胞(PBMC)を収集した。
培養を開始してから3日後、底部から離れて浮遊する細胞を収集し、数えた後、所定の量ずつ培養容器に移し、成熟化の準備をした。一部の細胞を取り、細胞表面で発現する様々なマーカー[HLA‐DR(BD,Cat#555812)、HLA‐ABC BD,Cat#555552]、CD40(BD,Cat#555588)、CD80(BD,Cat#557227)、CD86(BD,Cat#555657)及びCD83(BD,Cat#556855)]の発現量をフローサイトメトリー(FACS)により分析した。
前記(2)の未成熟樹状細胞の成熟化を誘導した。すなわち、樹状細胞の成熟化を誘導するために、TNF‐α(Tumor necrosis factor‐α;Peprotech#300‐01A、10ng/mL)、IL‐1β(Interleukin‐1β;Peprotech#200‐01B、10ng/mL)、IL‐6(Interleukin‐6;Peprotech#200‐06、10ng/mL)、PGE2(Prostaglandin E2;SIGMA#P0409、1μg/mL)を所定の比率で入れた。この培地には、また、樹状細胞成熟化及び活性化因子として細胞性免疫誘導因子としてTLR(toll like receptor)信号物質として知られているPoly IC(SIGMA#P0913、最終濃度:10μg/mL)とIFN‐γ(LG生命科学製、最終濃度:30〜1000U/mL)を所定の濃度で添加した。また、さらに、mTOR阻害剤であるrapamycin(Santa Cruz #SC‐3504)を5〜10ng/mLの濃度で培地に添加した。
未成熟樹状細胞に成熟化因子と抗原を同時に処理しており、抗原を処理した時点以外は、前記実施例1と同じ方法で樹状細胞を製造した。
実施例1(Ag‐BH4h;抗原感作を成熟化の最後の段階である細胞収穫4時間前に遂行)及び比較例1(Ag‐O/N抗原感作を未成熟段階で成熟化因子処理とともに遂行)の樹状細胞を製造する際に成熟化の過程後、各樹状細胞の移動能と培養液に分泌されたIL‐12の量を測定し、図1aと図1bに示しており、末梢血細胞から分離したT細胞と前記実施例1及び比較例1の樹状細胞を共培養の際にT cellの増殖とIFN‐γを測定し、それぞれ図1cと図1dに示す。この際、抗原としては、GPC‐3(配列番号15)を用いた。
実施例1(Ag‐BH4h)、比較例1(Ag‐O/N)樹状細胞と末梢血細胞(PBMC)から分離した自己T細胞を反応させて細胞傷害性Tリンパ球(CTL)を誘導した。この際、抗原としては、GPC‐3を用いた。樹状細胞の製造に使用された同じヒトの末梢血細胞からnaive T cell isolation kit(MACS,Cat.#130‐097‐095)を用いてT細胞を分離した。成熟した樹状細胞と分離されたT細胞を1:10(4×105:4×106)の割合で混合し、6〜7日間培養した。1次刺激したT細胞は収集して抗原に感作した樹状細胞と同一の割合(1:10)で再刺激を行った。培養培地(RPMI1640+10%AB serum)は、培養2日〜3日ごとに新たな培地を添加するか交換して適切な培養環境を提供した。最初の刺激の際、IL‐7(Peprotech,Cat.#200‐07)を5ng/mLの濃度で添加し、2回目の刺激からは培養2日〜3日までIL‐7を同一濃度で処理しており、その後にはIL‐2(Proleukin,Norvatis)を50U/mLの濃度で処理した。抗原‐感作した樹状細胞で2〜3回繰り返してT細胞を刺激して誘導したCTLに対してCTL細胞数の確認(図2a)とCTLの活性試験(細胞傷害性、図2b)を分析した。すなわち、CTL誘導過程中にT細胞と樹状細胞の共培養の際に刺激の翌日、上澄み液の一部を取り、IFN‐γ分泌量をELISA方法で測定した。その結果を図2bに示す。
未成熟樹状細胞及び実施例1(Ag‐BH4h)、比較例1(Ag‐O/N)樹状細胞の表現型を分析するために、樹状細胞をFACS buffer(PBS+0.1%のsodium azide+1%FBS)に懸濁してFACS tube当たり3〜5×104cellsに準備した。この際、抗原としてはGPC‐3を用いた。次に、HLA‐DR、HLA‐ABC、CD80、CD86、CD40、CD83に対するFACS antibody[HLA‐DR(BD,Cat#555812)、HLA‐ABC BD,Cat#555552]、CD40(BD,Cat#555588)、CD80(BD,Cat#557227)、CD86(BD,Cat#555657)及びCD83(BD,Cat#556855)]3μLを添加して4℃で20分間反応させた。反応後、FACS bufferで洗浄した後、細胞表現型の分析を行った。成熟した樹状細胞の表現型であるHLA‐DR、HLA‐ABC、CD80、CD86、CD40、CD83に対する発現を確認した。その結果を図3及び表1に示す。
試験例1、試験例2、試験例3の方法によりCTLを誘導し、CTP有無による機能評価を実施した。CTPがあればCTP‐Agと表記し、CTPのない抗原の場合、X‐Agと表記した。この際、抗原としては、GPC‐3を用いた。樹状細胞表現型を確認した結果を図4aに示す。自己T細胞と実施例1又は比較例1による樹状細胞を5日間共培養した後、培養液でのIFN‐γをELISA方法で分析し、その結果を4bに示す。CTLを誘導してCD8 positive細胞を分析して図4cに示し、上澄み液でのIFN‐γをELISA方法で測定し、図4dに示す。GPC‐3抗原を感作したそれぞれの樹状細胞により誘導された活性T細胞に対して抗原特異的免疫反応をIFN‐γ ELISPOTにより分析し、その結果を図4eに示す。
未成熟樹状細胞及び実施例1(Ag‐BH4h)の成熟樹状細胞の抗原取込能を確認するために、ローダミン(rhodamine)で標識された抗原(PSA抗原、配列番号16)の取込能を分析した。また、この際、未成熟又は成熟樹状細胞の抗原取込能を確認するために最も一般的に使用するDextran‐uptake assayをともに行った。ローダミンで標識された抗原の製造は、以下のように準備した。先ず、NHS‐Rhodamine(Pierce)をDMSO(SIGMA)に10mg/mLの濃度で溶解した後、1mg/mLのタンパク質と混合して1時間反応した。沈殿物は、遠心分離して除去し、反応していないNHS‐Rhodamineはゲルろ過クロマトグラフィー(gel filtration chromatography)(GE、Sephadex G‐25、17‐0033‐02)を使用して除去した。標識されたタンパク質は、HPLC(Agilent、1200series)を使用してEx/Em=552/575nmで確認しており、タンパク質定量は、分光光度計(spectrophotometer)(Agilent、8453series)で280/555nmで吸光度を測定して計算した。
実施例1(Ag‐BH4h;16h)、比較例1(Ag‐O/N;0h)を含み成熟化因子処理時点から成熟化樹状細胞の収穫時点までCTP‐GPC3を細分化し、図6aのように処理した。図6aに記載の実験方法は、実施例1の樹状細胞の製造方法と抗原処理時期における差のみが存在し、それ以外の培養条件は同様に適用した。成熟化因子処理時点後、時間別(0、2、4、8、12、16、18、19.5時間)にCTP‐GPC3を5μg/mLで感作しており、成熟化因子処理時点から20時間の時点にすべての細胞を収集した。この際、抗原処理時点が0時間は前記O/Nと同じ表現であり、16時間の時点はBH4hと同じ表現である。自己T細胞と樹状細胞を5日間培養した後、培養液でのIFN‐γをELISA方法で分析し、その結果を図6bに示す。
Claims (14)
- 成熟化因子を処理して培養した樹状細胞に細胞透過能を有するペプチドと結合した抗原を感作させる段階を含む、樹状細胞の製造方法。
- 前記細胞膜透過能を有するペプチドは、細胞質残留性細胞膜透過ペプチド(cytoplasmic transduction peptide、CTP)を含むことを特徴とする請求項1に記載の製造方法。
- 前記成熟化因子は、インターロイキン‐1β(Interleukin‐1β;IL‐1β)、インターロイキン‐6(Interleukin‐6;IL‐6)、腫瘍壊死因子(Tumor necrosis factor‐α;TNF‐α)、インターフェロン−γ(IFN‐γ)、プロスタグランジンE‐2(Prostaglandin E2;PGE2)、ピシバニール(Picibanil;OK‐432)、ポリIC(Poly IC)、mTOR阻害剤及びこれらの二つ以上の組み合わせからなる群から選択される1種以上であることを特徴とする請求項1に記載の製造方法。
- 前記mTOR阻害剤は、ラパマイシン、シロリムス、エベロリムス、テムシロリムス、リダフォロリムス、NVP‐BEZ235、SF‐1126、XL‐765、PKI‐587、PF‐04691502、PKI‐402、OSI‐027、AZD‐8055、PP‐242、PP‐30、torin‐1、WYE‐125132、WAY‐600、WYE‐687、WYE‐354、KU‐0063794及びパロミド‐529からなる群から選択されるいずれか一つであることを特徴とする請求項3に記載の製造方法。
- 前記mTOR阻害剤は、ラパマイシンであることを特徴とする請求項3に記載の製造方法。
- 前記mTOR阻害剤は、1〜500ng/mLの濃度で処理することを特徴とする請求項5に記載の製造方法。
- 前記ラパマイシンは、1〜50ng/mLの濃度で処理することを特徴とする請求項6に記載の製造方法。
- 前記成熟化因子処理後1〜48時間に抗原感作させることを特徴とする請求項1に記載の製造方法。
- 前記抗原感作は8時間以下の間行うことを特徴とする請求項1に記載の製造方法。
- CD80、CD83またはCD40の発現水準が、未成熟樹状細胞に比べ60%以上増加した時、樹状細胞に抗原を感作させることを特徴とする請求項1に記載の製造方法。
- 請求項1〜10の中何れか一項に記載の方法により製造された樹状細胞。
- 請求項11に記載の樹状細胞を含む免疫治療剤。
- 請求項11に記載の樹状細胞を含む抗腫瘍ワクチン。
- 請求項11に記載の樹状細胞を含む腫瘍治療用の薬剤学的組成物。
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DK3176258T3 (da) | 2020-06-29 |
US20170196955A1 (en) | 2017-07-13 |
KR101518972B1 (ko) | 2015-05-18 |
ES2796299T3 (es) | 2020-11-26 |
US10478479B2 (en) | 2019-11-19 |
EP3176258A4 (en) | 2018-03-28 |
EP3176258B1 (en) | 2020-05-13 |
JP6602377B2 (ja) | 2019-11-06 |
EP3176258A1 (en) | 2017-06-07 |
CN106604989B (zh) | 2020-10-16 |
WO2016018053A1 (ko) | 2016-02-04 |
CN106604989A (zh) | 2017-04-26 |
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