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Calcium-dependent Epidermal Growth Factor Receptor Transactivation Mediates the Angiotensin II-induced Mitogen-activated Protein Kinase Activation in Vascular Smooth Muscle Cells
Open accessAbstract
We have recently reported that angiotensin II (Ang II)-induced mitogen-activated protein kinase (MAPK) activation is mainly mediated by Ca2+-dependent activation of a protein tyrosine kinase through Gq-coupled Ang II type 1 receptor in cultured rat vascular smooth muscle cells (VSMC). In the present study, we found Ang II rapidly induced the tyrosine phosphorylation of the epidermal growth factor (EGF) receptor and its association with Shc and Grb2. These reactions were inhibited by the EGF receptor kinase inhibitor, AG1478. The Ang II-induced phosphorylation of the EGF receptor was mimicked by a Ca2+ ionophore and completely inhibited by an intracellular Ca2+ chelator. Thus, AG1478 abolished the MAPK activation induced by Ang II, a Ca2+ ionophore as well as EGF but not by a phorbol ester or platelet-derived growth factor-BB in the VSMC. Moreover, Ang II induced association of EGF receptor with catalytically active c-Src. This reaction was not affected by AG1478. These data indicate that Ang II induces Ca2+-dependent transactivation of the EGF receptor which serves as a scaffold for pre-activated c-Src and for downstream adaptors, leading to MAPK activation in VSMC.
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Cites
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Pawson, T. (1995) · Nature · doi:10.1038/373573a0 · Cited by 2,420
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Metadata
- Authors
- Eguchi, S., Numaguchi, K., Iwasaki, H., Matsumoto, T., Yamakawa, T., Utsunomiya, H., Motley, E. D., Kawakatsu, H., Owada, K. M., Hirata, Y., Marumo, F., & Inagami, T.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 1998-04
- Volume
- 273
- Issue
- 15
- Pages
- 8890-8896
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W2153899018
- Cited by
- 566
- References
- 1
- FWCI
- 33.65
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- CoChat. (2026). Citation check: Calcium-dependent Epidermal Growth Factor Receptor Transactivation Mediates the Angiotensin II-induced Mitogen-activated Protein Kinase Activation in Vascular Smooth Muscle Cells. https://app.cochat.ai/papers/10.1074/jbc.273.15.8890
- The paper
- Eguchi, S., Numaguchi, K., Iwasaki, H., Matsumoto, T., Yamakawa, T., Utsunomiya, H., Motley, E. D., Kawakatsu, H., Owada, K. M., Hirata, Y., Marumo, F., & Inagami, T. (1998). Calcium-dependent Epidermal Growth Factor Receptor Transactivation Mediates the Angiotensin II-induced Mitogen-activated Protein Kinase Activation in Vascular Smooth Muscle Cells. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.273.15.8890
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