PMID- 23575451 OWN - NLM STAT- MEDLINE DCOM- 20131206 LR - 20190911 IS - 1347-8648 (Electronic) IS - 1347-8613 (Linking) VI - 122 IP - 1 DP - 2013 TI - Ezrin, radixin, and moesin phosphorylation in NIH3T3 cells revealed angiotensin II type 1 receptor cell-type-dependent biased signaling. PG - 1-9 AB - beta-Arrestin-biased agonists are a new class of drugs with promising therapeutic effects. The molecular mechanisms of beta-arrestin-biased agonists are still not completely identified. Here, we investigated the effect of angiotensin II (AngII) and [Sar1,Ile4,Ile8] AngII (SII), a beta-arrestin-biased agonist, on ezrin-radixin-moesin (ERM) phosphorylation in NIH3T3 cells (a fibroblast cell line) stably expressing AngII type 1A receptor. ERM proteins are cross-linkers between the plasma membrane and the actin cytoskeleton and control a number of signaling pathways. We also investigated the role of Galphaq protein and beta-arrestins in mediating ERM phosphorylation. We found that AngII stimulates ERM phosphorylation by acting as a beta-arrestin-biased agonist and AngII-stimulated ERM phosphorylation is mediated by beta-arrestin2 not beta-arrestin1. We also found that SII inhibits ERM phosphorylation by acting as a Galphaq protein-biased agonist. We concluded that ERM phosphorylation is a unique beta-arrestin-biased agonism signal. Both AngII and SII can activate either Galphaq protein or beta-arrestin-mediated signaling as functional biased agonists according to the type of the cell on which they act. FAU - Ibrahim, Islam A A E-H AU - Ibrahim IA AD - Department of Pharmacology and Toxicology, Graduate School of Pharmaceutical Sciences, Kyushu University, Japan. FAU - Nakaya, Michio AU - Nakaya M FAU - Kurose, Hitoshi AU - Kurose H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130409 PL - Japan TA - J Pharmacol Sci JT - Journal of pharmacological sciences JID - 101167001 RN - 0 (Arrestins) RN - 0 (Cytoskeletal Proteins) RN - 0 (Membrane Proteins) RN - 0 (Microfilament Proteins) RN - 0 (Receptor, Angiotensin, Type 1) RN - 0 (beta-Arrestins) RN - 0 (ezrin) RN - 11128-99-7 (Angiotensin II) RN - 144131-77-1 (moesin) RN - 144517-21-5 (radixin) RN - EC 3.6.5.1 (GTP-Binding Protein alpha Subunits, Gq-G11) SB - IM MH - Angiotensin II/*pharmacology MH - Animals MH - Arrestins/metabolism MH - Cytoskeletal Proteins/*metabolism MH - GTP-Binding Protein alpha Subunits, Gq-G11/metabolism MH - Membrane Proteins/*metabolism MH - Mice MH - Microfilament Proteins/*metabolism MH - NIH 3T3 Cells MH - Phosphorylation MH - Receptor, Angiotensin, Type 1/agonists/*metabolism MH - Signal Transduction MH - beta-Arrestins EDAT- 2013/04/12 06:00 MHDA- 2013/12/16 06:00 CRDT- 2013/04/12 06:00 PHST- 2013/04/12 06:00 [entrez] PHST- 2013/04/12 06:00 [pubmed] PHST- 2013/12/16 06:00 [medline] AID - DN/JST.JSTAGE/jphs/12288FP [pii] AID - 10.1254/jphs.12288fp [doi] PST - ppublish SO - J Pharmacol Sci. 2013;122(1):1-9. doi: 10.1254/jphs.12288fp. Epub 2013 Apr 9.