| First Author | Weinman EJ | Year | 2010 |
| Journal | J Biol Chem | Volume | 285 |
| Issue | 18 | Pages | 13454-60 |
| PubMed ID | 20200151 | Mgi Jnum | J:162594 |
| Mgi Id | MGI:4819345 | Doi | 10.1074/jbc.M109.094359 |
| Citation | Weinman EJ, et al. (2010) Sodium-hydrogen exchanger regulatory factor 1 (NHERF-1) transduces signals that mediate dopamine inhibition of sodium-phosphate co-transport in mouse kidney. J Biol Chem 285(18):13454-60 |
| abstractText | Dopamine inhibited phosphate transport in isolated renal brush border membrane vesicles and in cultured renal proximal tubule cells from wild-type but not from NHERF-1 null mice. Co-immunoprecipitation experiments established that NHERF-1 associated with D1-like receptors. In wild-type mice, dopamine stimulated cAMP accumulation and protein kinase C (PKC) activity in renal proximal tubule cells, an effect that was abolished by SCH-23390, a D1-like receptor antagonist. In NHERF-1 null kidney tissue; however, dopamine failed to stimulate either cAMP accumulation or PKC activity. Infection of proximal tubule cells from NHERF-1 null mice with adenovirus-green fluorescent protein-NHERF-1 restored the ability of dopamine to stimulate cAMP and PKC. Finally, in (32)P-labeled wild-type proximal tubule cells and in opossum kidney cells, dopamine increased NHERF-1 phosphorylation at serine 77 of the PDZ I domain of NHERF-1, a site previously shown to attenuate binding of cellular targets including the Npt2a (sodium-dependent phosphate transporter 2a). Together, these studies establish that NHERF-1 plays a key role in dopamine signaling and is also a downstream target of D1-like receptors in the mouse kidney. These studies suggest a novel role for the PDZ adapter protein NHERF-1 in coordinating dopamine signals that inhibit renal phosphate transport. |
