We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Interacting molecule of AT1 receptor, ATRAP, is colocalized with AT1 receptor in the mouse renal tubules.
- Authors
Tsurumi, Y.; Tamura, K.; Tanaka, Y.; Koide, Y.; Sakai, M.; Yabana, M.; Noda, Y.; Hashimoto, T.; Kihara, M.; Hirawa, N.; Toya, Y.; Kiuchi, Y.; Iwai, M.; Horiuchi, M.; Umemura, S.
- Abstract
The renin–angiotensin system in the kidney plays a critical role in the regulation of renal hemodynamics and sodium handling through the activation of vascular, glomerular and tubular angiotensin II type 1 (AT1) receptor-mediated signaling. We previously cloned a molecule that specifically bound to the AT1 receptor and modulated AT1 receptor signaling in vitro, which we named ATRAP (for AT1 receptor-associated protein). The purpose of this study is to analyze the renal distribution of ATRAP and to examine whether ATRAP is co-expressed with the AT1 receptor in the mouse kidney. We performed in situ hybridization, Western blot analysis, and immunohistochemistry to investigate the expression of ATRAP mRNA and protein in the mouse kidney. The results of Western blot analysis revealed the ATRAP protein to be abundantly expressed in the kidney. Employing in situ hybridization and immunohistochemistry, we found that both ATRAP mRNA and the protein were widely distributed along the renal tubules from Bowman's capsules to the inner medullary collecting ducts. ATRAP mRNA was also detected in the glomeruli, vasculature, and interstitial cells. In all tubular cells, the ATRAP protein colocalized with the AT1 receptor. Finally, we found that the dietary salt depletion significantly decreased the renal expression of ATRAP as well as AT1 receptor. These findings show ATRAP to be abundantly and broadly distributed in nephron segments where the AT1 receptor is expressed. Furthermore, this is the first report demonstrating a substantial colocalization of ATRAP and AT1 receptor in vivo.Kidney International (2006) 69, 488–494. doi:10.1038/sj.ki.5000130; published online 6 January 2006
- Subjects
RENIN-angiotensin system; ANGIOTENSINS; RENAL cell carcinoma; IN situ hybridization; IMMUNOHISTOCHEMISTRY; KIDNEY diseases
- Publication
Kidney International, 2006, Vol 69, Issue 3, p488
- ISSN
0085-2538
- Publication type
Article
- DOI
10.1038/sj.ki.5000130