Rare Diseases Symptoms Automatic Extraction

Antitumor effects and molecular mechanisms of figitumumab, a humanized monoclonal antibody to IGF-1 receptor, in esophageal carcinoma.

[esophageal squamous cell carcinoma]

The insulin-like growth factor type 1 receptor (IGF-1R) plays an essential role in the development of numerous cancers. Figitumumab (CP) is not only a monocloncal antibody, it also has agonist activity on IGF-1R. The antitumor activity of CP in esophageal squamous cell carcinoma (ESCC) is still unclear. In our study, we identified IGF-1R as an independent prognostic factor in ESCC patients, and investigated the antitumor effects of CP in ESCC cell lines. CP suppressed tumor growth and sensitized cells to chemotherapeutic drugs. In addition, CP inhibited cell proliferation, migration, colony forming activity and anti-apoptosis induced by IGF-1. Our results showed that CP not only inhibited IGF-1 induced receptor autophosphorylation and downstream signaling, but also triggered β-arrestin1 and G protein-coupled receptor kinases (GRKs) mediated ERK1/2 activation, indicating CP as a biased agonist for IGF-1R. Inhibition of ERK1/2 enhanced the antitumor activity of CP. Furthermore, CP was a more powerful agonist for IGF-1R down-regulation than IGF-1, and dysregulation of β-arrestin1 and GRKs affected this down-regulation. Thus, we demonstrated antitumor activities of CP on ESCC, and as a biased agonist, CP induced ERK1/2 activation and receptor down-regulation required β-arrestin1 and GRKs, suggesting a promising role for targeting IGF-1R in ESCC.

Diseases presenting "squamous cell carcinoma" symptom

  • carcinoma of the gallbladder
  • child syndrome
  • dystrophic epidermolysis bullosa
  • epidermolysis bullosa simplex
  • esophageal adenocarcinoma
  • esophageal carcinoma
  • esophageal squamous cell carcinoma
  • junctional epidermolysis bullosa
  • kallmann syndrome
  • kindler syndrome
  • liposarcoma
  • monosomy 21
  • oculocutaneous albinism
  • oral submucous fibrosis
  • papillon-lefèvre syndrome

This symptom has already been validated