Drug discovery for overcoming chronic kidney disease (CKD): New therapy for CKD by a (pro)renin-receptor-blocking decoy peptide

Atsuhiro Ichihara, Mariyo Sakoda, Asako Kurauchi-Mito, Tatsuya Narita, Kenichiro Kinouchi, Hiroshi Itoh

Research output: Contribution to journalShort survey

13 Citations (Scopus)

Abstract

Discovery of the (pro)renin receptor uncovered a novel function of renin /prorenin as the receptor ligands in addition to the enzyme and its precursor. The bindings of renin and prorenin to the (pro)renin receptor trigger two major pathways: the angiotensin II-dependent pathway as a result of the enzymatic activation of renin/prorenin and the angiotensin II- independent intracellular pathway involving hypertrophic, hyperplastic, and profibrotic signals. A specific blocker of the receptor was discovered through identification of the amino acid sequence of prorenin prosegment that binds to the receptor and leads to non-proteolytic conversion of prorenin to its active form. A peptide containing this sequence was found to block the binding of prorenin to its receptor. Its infusion in animal models of diabetes and low-renin hypertension significantly inhibited the development and progression of nephropathy, but (pro)renin receptor blockade had no benefit in the clipped kidney of 2K1C rats or rat models of high-renin hypertension. Since renin is still active without a (pro)renin receptor, (pro)renin- receptor blockade elicits a maximum benefit under low-renin conditions. Thus, (pro)renin-receptor blockade can be a useful therapy for chronic kidney disease with low renin levels in the plasma.

Original languageEnglish
Pages (from-to)20-23
Number of pages4
JournalJournal of Pharmacological Sciences
Volume109
Issue number1
DOIs
Publication statusPublished - 2009 Jan 29

Keywords

  • Angiotensin
  • Chronic kidney disease (CKD)
  • Diabetes
  • Hypertension
  • Mitogen-activated protein kinase
  • Renin

ASJC Scopus subject areas

  • Molecular Medicine
  • Pharmacology

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