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Two chemically linked fragments antigen-binding form an artificial antibody that binds to two different antigens, making it a type of bispecific antibody. They are fragments antigen-binding (Fab or Fab') of two different monoclonal antibodies and are linked by chemical means like a thioether. Typically, one of the Fabs binds to a tumour antigen (such as CD30) and the other to a protein on the surface of an immune cell, for example an Fc receptor on a macrophage. In this way, tumour cells are attached to immune cells, which destroy them.

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  • Two chemically linked fragments antigen-binding form an artificial antibody that binds to two different antigens, making it a type of bispecific antibody. They are fragments antigen-binding (Fab or Fab') of two different monoclonal antibodies and are linked by chemical means like a thioether. Typically, one of the Fabs binds to a tumour antigen (such as CD30) and the other to a protein on the surface of an immune cell, for example an Fc receptor on a macrophage. In this way, tumour cells are attached to immune cells, which destroy them. In the late 1990s and early 2000s, clinical trials with chemically linked Fabs were conducted for the treatment of various types of cancer. Early results were promising, but the concept was dropped because of high production costs. Bi-specific T-cell engagers employ a similar mechanism of action while being cheaper. (en)
  • Due Fab chimicamente legati (dall'inglese Fragments Antigen-Binding), formano un anticorpo artificiale che si lega a due antigeni diversi, diventando così un anticorpo bispecifico. Un Fab fragment è una regione di un anticorpo che lega l'antigene di due diversi anticorpi monoclonali collegati da "ponti chimici" come un tioetere. In genere, uno dei due Fab si lega ad un antigene tumorale come il CD30, mentre l'altro si lega ad una proteina presente sulla superficie di una cellula immunitaria, come per esempio il del macrofago. In questo modo, le cellule tumorali vengono collegate alle cellule immunitarie, che li possono più facilmente aggredire e distruggere. Tra la fine del 1990 e i primi anni del 2000, sono stati condotti studi clinici con Fab legati chimicamente per il trattamento di vari tipi di cancro. A fronte di primi risultati promettenti, questa strategia terapeutica è stata successivamente abbandonata per gli alti costi di produzione. Leganti bi-specifici delle cellule T utilizzano un meccanismo di azione simile, però sono più economici. (it)
  • 化学結合型Fab(Chemically linked Fab)とは、2つの異なる抗原に結合する抗体の抗原結合部位断片が、化学的に結合した人工抗体を形成しているペプチドであり、二重特異性抗体の一種である。これらは、2つの異なるモノクローナル抗体の抗原結合部位(FabまたはFab')であり、チオエーテルのような化学的手段で結合されている。通常、Fabの一方は腫瘍抗原(など)に結合し、もう一方は免疫細胞の表面にあるタンパク質(マクロファージのFc受容体など)に結合する。この様にして、腫瘍細胞は免疫細胞に付着し、免疫細胞は腫瘍細胞を破壊する。 1990年代後半から2000年代前半にかけて、様々な種類の癌の治療を目的として、化学的に結合したFabを用いた臨床試験が行われた。初期の結果は有望であったが、製造コストが高かったため、このコンセプトは中止された。 二重特異性T細胞誘導抗体(BiTE抗体)は、同様の作用メカニズムを採用しているが、コストが低い。 (ja)
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  • 化学結合型Fab(Chemically linked Fab)とは、2つの異なる抗原に結合する抗体の抗原結合部位断片が、化学的に結合した人工抗体を形成しているペプチドであり、二重特異性抗体の一種である。これらは、2つの異なるモノクローナル抗体の抗原結合部位(FabまたはFab')であり、チオエーテルのような化学的手段で結合されている。通常、Fabの一方は腫瘍抗原(など)に結合し、もう一方は免疫細胞の表面にあるタンパク質(マクロファージのFc受容体など)に結合する。この様にして、腫瘍細胞は免疫細胞に付着し、免疫細胞は腫瘍細胞を破壊する。 1990年代後半から2000年代前半にかけて、様々な種類の癌の治療を目的として、化学的に結合したFabを用いた臨床試験が行われた。初期の結果は有望であったが、製造コストが高かったため、このコンセプトは中止された。 二重特異性T細胞誘導抗体(BiTE抗体)は、同様の作用メカニズムを採用しているが、コストが低い。 (ja)
  • Two chemically linked fragments antigen-binding form an artificial antibody that binds to two different antigens, making it a type of bispecific antibody. They are fragments antigen-binding (Fab or Fab') of two different monoclonal antibodies and are linked by chemical means like a thioether. Typically, one of the Fabs binds to a tumour antigen (such as CD30) and the other to a protein on the surface of an immune cell, for example an Fc receptor on a macrophage. In this way, tumour cells are attached to immune cells, which destroy them. (en)
  • Due Fab chimicamente legati (dall'inglese Fragments Antigen-Binding), formano un anticorpo artificiale che si lega a due antigeni diversi, diventando così un anticorpo bispecifico. Un Fab fragment è una regione di un anticorpo che lega l'antigene di due diversi anticorpi monoclonali collegati da "ponti chimici" come un tioetere. (it)
rdfs:label
  • Chemically linked Fab (en)
  • Fab chimicamente legati (it)
  • 化学結合型Fab (ja)
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