JP5990752B2 - 抗体療法の効果増強剤 - Google Patents
抗体療法の効果増強剤 Download PDFInfo
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- JP5990752B2 JP5990752B2 JP2012555739A JP2012555739A JP5990752B2 JP 5990752 B2 JP5990752 B2 JP 5990752B2 JP 2012555739 A JP2012555739 A JP 2012555739A JP 2012555739 A JP2012555739 A JP 2012555739A JP 5990752 B2 JP5990752 B2 JP 5990752B2
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Classifications
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/12—Materials from mammals; Compositions comprising non-specified tissues or cells; Compositions comprising non-embryonic stem cells; Genetically modified cells
- A61K35/20—Milk; Whey; Colostrum
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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- A61K33/42—Phosphorus; Compounds thereof
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
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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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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0019—Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
- A61K9/0024—Solid, semi-solid or solidifying implants, which are implanted or injected in body tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/2863—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against receptors for growth factors, growth regulators
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- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/30—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants from tumour cells
- C07K16/3007—Carcino-embryonic Antigens
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- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/32—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against translation products of oncogenes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
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- Neurosurgery (AREA)
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- Materials For Medical Uses (AREA)
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Description
β−TCPブロックは、人工骨として製品を購入することもできるが、原料のβ−TCPと水、界面活性剤、発泡剤を混ぜ、焼結することにより作製することもできる。かかるβ−TCPブロックは、気孔率75%や気孔率60%であった。また、β−TCP粉末やβ−TCP顆粒については、前記気孔率75%のβ−TCPブロックを粉砕し、篩にかけて粒径75〜105μmのβ−TCP粉末(気孔率:60〜70%)を得た。また、同様に篩にかけて得られた25〜75μmのβ−TCP(気孔率:40〜50%)とPBS溶液を混合後、すぐに液体上部4分の3部分の液体を採取し、1000rpmにて3分間の遠心操作で沈殿から0.05〜25μmのβ−TCPミクロン顆粒(気孔率:35〜50%)を、上清から0.05〜5μmのミクロン顆粒を採取した(気孔率:20〜30%)。また、リン酸水素カルシウム、炭酸カルシウム及び水を適切な割合で混合してスラリーを調製し、調製したスラリーを摩砕しながら反応させた後に乾燥させ、得られた固形物を粉砕して仮焼することでβ−TCP粉末が得られ、その粉末を圧縮形成することによりφ5×2mm錠剤に賦形し、600〜1500℃で30時間焼結することで、円板状のβ−TCP緻密体錠剤を作製した(気孔率:0.1〜20%)。また、β−TCPの原料粉末30g、界面活性剤6.0ml、水10mlとを遠心管に注入し、250rpmで4分間処理することで脱泡処理をし、型に注入して自然乾燥させ、離型後、1300℃にて焼結することで、φ0.9×10mmの柱状のβ−TCP緻密体棒剤を作製した(気孔率:10〜30%)。なお、作製した各β−TCPの気孔率は、水銀法にて、初期圧に対応する直径約180μmの細孔にまで水銀が圧入された時の試料体積に対する値として測定された。
6週齢の雄性ヌードマウス(BALB/c-nu/nu)皮内に2.5×106個のヒト大腸癌細胞COLO 205(ATCC社より購入)を移植し、5〜7日後、マウスに形成された腫瘍サイズを計測して腫瘍体積を算出した。腫瘍体積の算出は以下の数式によった。
腫瘍体積=(長径×短径2)/2 (mm3)
そして、各群の腫瘍体積が均等になるように群分けを行い、以下の処置群を設定した。
1群:対照群
2群:β−TCP移植群
3群:抗CEA抗体(マウス抗ヒトCarcinoembryonic Antigen抗体)投与群
4群:β−TCP移植+抗CEA抗体投与群
6週齢の雄性ヌードマウス(BALB/c-nu/nu)皮内に5×106個のヒト肺癌細胞A549(ATCC社より購入)を移植し、7日後、ヌードマウスに形成された腫瘍サイズを計測して腫瘍体積を算出した。腫瘍体積の算出は以下の数式によった。
腫瘍体積=(長径×短径2)/2 (mm3)
そして、各群の腫瘍体積が均等になるように群分けを行い、以下の処置群を設定した。
1群:対照群
2群:Erbitax;抗EGFR抗体(マウス抗ヒトEGFR抗体)
3群:β−TCP移植群
4群:β−TCP移植+抗EGFR抗体投与群
実験結果を図14に示す。コントロール及び抗EGFR抗体、β−TCPそれぞれ単独(1〜3群)では腫瘍増殖抑制の効果は見られなかったが、β−TCP及び抗EGFR抗体を併用した4群では、腫瘍増殖抑制の効果が観察された。
6週齢の雄性ヌードマウス(BALB/c-nu/nu)皮内に5×106個のヒト肺癌細胞Calu-3(ATCC社より購入)を移植し、ヌードマウスに形成された腫瘍サイズを計測して腫瘍体積を算出した。腫瘍体積の算出は以下の数式によった。
腫瘍体積=(長径×短径2)/2 (mm3)
そして、腫瘍体積が50−150mm3となった時点で各群の腫瘍体積が均等になるように群分けを行い、以下の処置群を設定した。
1群:対照群
2群:β−TCP移植群
3群:抗HER2抗体(ハーセプチン)投与群
4群:β−TCP移植+抗HER2抗体投与群
実験結果を図15に示す。コントロール及び抗HER2抗体、β−TCPそれぞれ単独(1〜3群)では腫瘍増殖抑制の効果は見られなかったが、β−TCPと抗HER2抗体を併用した4群では、有意な腫瘍増殖抑制効果が観察された。
Claims (16)
- 対象の体内に移植されて用いられる気孔率50%以下の緻密体であるβ−リン酸三カルシウムを有効成分とする組成物と、がん特異的抗体医薬組成物とを備えた抗体療法キット。
- 体内が、皮下であることを特徴とする請求項1記載の抗体療法キット。
- β−リン酸三カルシウムが病変近傍に移植されることを特徴とする請求項1又は2記載の抗体療法キット。
- 病変近傍が、病変から0.1〜15cmの距離にある領域であることを特徴とする請求項3記載の抗体療法キット。
- がん特異的抗体が、抗CEA抗体、抗HER2抗体、及び抗EGFR抗体から選ばれる1種又は2種以上の抗体であることを特徴とする請求項1〜4のいずれか記載の抗体療法キット。
- β−リン酸三カルシウムが、T細胞、B細胞、NK細胞、樹状細胞、及びマクロファージを活性化、誘導、又は集積することを特徴とする請求項1〜5のいずれか記載の抗体療法キット。
- β−リン酸三カルシウムが、錠剤又は柱状体であることを特徴とする請求項1〜6のいずれか記載の抗体療法キット。
- β−リン酸三カルシウムが、粒径0.05〜25μmの粒子又は顆粒であることを特徴とする請求項1〜6のいずれか記載の抗体療法キット。
- 対象の体内に移植されて用いられる気孔率50%以下の緻密体であるβ−リン酸三カルシウムを有効成分とする、がん特異的抗体医薬組成物を用いる抗体療法の効果増強剤。
- 体内が、皮下であることを特徴とする請求項9記載の抗体療法の効果増強剤。
- β−リン酸三カルシウムが病変近傍に移植されることを特徴とする請求項9又は10記載の抗体療法の効果増強剤。
- 病変近傍が、病変から0.1〜15cmの距離にある領域であることを特徴とする請求項11記載の抗体療法の効果増強剤。
- がん特異的抗体が、抗CEA抗体、抗HER2抗体、及び抗EGFR抗体から選ばれる1種又は2種以上の抗体であることを特徴とする請求項9〜12のいずれか記載の抗体療法の効果増強剤。
- β−リン酸三カルシウムが、T細胞、B細胞、NK細胞、樹状細胞、及びマクロファージを活性化、誘導、又は集積することを特徴とする請求項9〜13のいずれか記載の抗体療法の効果増強剤。
- β−リン酸三カルシウムが、錠剤又は柱状体であることを特徴とする請求項9〜14のいずれか記載の抗体療法の効果増強剤。
- β−リン酸三カルシウムが、粒径0.05〜25μmの粒子又は顆粒であることを特徴とする請求項9〜14のいずれか記載の抗体療法の効果増強剤。
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