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ICHIHARA Atsuhiro
Department School of Medicine(Tokyo Women's Medical University Hospital), School of Medicine Position Professor and Division head |
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| Article types | Original article |
| Language | English |
| Peer review | Peer reviewed |
| Title | Antidiuretic Action of Collecting Duct (Pro)Renin Receptor Downstream of Vasopressin and PGE2 Receptor EP4. |
| Journal | Formal name：Journal of the American Society of Nephrology : JASN Abbreviation：J Am Soc Nephrol ISSN code：15333450(Electronic)10466673(Linking) |
| Volume, Issue, Page | 27(10),pp.3022-3034 |
| Author and coauthor | Wang Fei†, Lu Xiaohan, Peng Kexin, Fang Hui, Zhou Li, Su Jiahui, Nau Adam, Yang Kevin T, ICHIHARA Atsuhiro, Lu Aihua, Zhou Shu-Feng, Yang Tianxin |
| Publication date | 2016/10 |
| Summary | UNASSIGNED:Within the kidney, the (pro)renin receptor (PRR) is predominantly expressed in the collecting duct (CD), particularly in intercalated cells, and it is regulated by the PGE2 receptor EP4. Notably, EP4 also controls urinary concentration through regulation of aquaporin 2 (AQP2). Here, we tested the hypothesis that sequential activation of EP4 and PRR determines AQP2 expression in the CD, thus mediating the antidiuretic action of vasopressin (AVP). Water deprivation (WD) elevated renal PRR expression and urinary soluble PRR excretion in rats. Intrarenal infusion of a PRR decoy peptide, PRO20, or an EP4 antagonist partially prevented the decrease in urine volume and the increase in urine osmolality and AQP2 expression induced by 48-hour WD. In primary cultures of rat inner medullary CD cells, AQP2 expression induced by AVP treatment for 24 hours depended on sequential activation of the EP4 receptor and PRR. Additionally, mice lacking PRR in the CD exhibited increased urine volume and decreased urine osmolality under basal conditions and impaired urine concentrating capability accompanied by severe volume loss and a dangerous level of plasma hyperosmolality after WD. Together, these results suggest a previously undescribed linear AVP/PGE2/EP4/PRR pathway in the CD for regulation of AQP2 expression and urine concentrating capability. |
| DOI | 10.1681/ASN.2015050592 |
| Document No. | 27000064 |