Abstract | BACKGROUND & AIMS: METHODS: RESULTS:
IL-8 dose dependently released the EGFR ligands and transiently phosphorylated EGFR, with a peak at 15 minutes. KB-R7785 completely blocked IL-8-induced shedding and EGFR transactivation. Depletion of ADAM10 also dramatically reduced IL-8-induced shedding and EGFR transactivation, but depletion of ADAM12 and 17 did not. IL-1beta dose dependently enhanced shedding of HB-EGF, which was not blocked by KB-R7785 in the early phase. In the late phase, however, the EGFR transactivation was blocked by KB-R7785 and abrogated by anti-IL-8 neutralizing antibody. CONCLUSIONS:
IL-8 induces shedding of EGFR ligands because of an ADAM10-dependent pathway in gastric cancer cells, whereas IL-1beta acts principally by an ADAM-independent pathway. IL-1beta-dependent prolonged EGFR transactivation involves multiple pathways, including an IL-8-dependent pathway.
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Authors | Satoshi Tanida, Takashi Joh, Keisuke Itoh, Hiromi Kataoka, Makoto Sasaki, Hirotaka Ohara, Takahiro Nakazawa, Tomoyuki Nomura, Yumi Kinugasa, Hiroshi Ohmoto, Hiroshi Ishiguro, Kohichiro Yoshino, Shigeki Higashiyama, Makoto Itoh |
Journal | Gastroenterology
(Gastroenterology)
Vol. 127
Issue 2
Pg. 559-69
(Aug 2004)
ISSN: 0016-5085 [Print] United States |
PMID | 15300588
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Antibodies
- Interleukin-1
- Interleukin-8
- Ligands
- Membrane Proteins
- RNA, Small Interfering
- Tyrosine
- ErbB Receptors
- Amyloid Precursor Protein Secretases
- ADAM Proteins
- Metalloendopeptidases
- ADAM10 Protein
- ADAM10 protein, human
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Topics |
- ADAM Proteins
- ADAM10 Protein
- Amyloid Precursor Protein Secretases
- Antibodies
(pharmacology)
- Cell Line, Tumor
- ErbB Receptors
(immunology, metabolism)
- Humans
- Interleukin-1
(genetics, metabolism)
- Interleukin-8
(genetics, metabolism)
- Ligands
- Membrane Proteins
(chemistry, genetics, metabolism)
- Metalloendopeptidases
(chemistry, genetics, metabolism)
- Phosphorylation
- Protein Structure, Tertiary
- RNA, Small Interfering
- Stomach Neoplasms
- Tyrosine
(metabolism)
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