Regulation of glomerular and proximal tubule renin mRNA by chronic changes in dietary NaCl

Julia E. Tank, William L. Henrich, Orson W. Moe

    Research output: Contribution to journalArticlepeer-review

    27 Scopus citations


    Renal adaptations to chronic changes in dietary NaCl and extracellular fluid volume involve both glomerular and tubular mechanisms that result in preservation of glomerular filtration rate and modifications of renal tubular transport to secure external NaCl balance. Although the systemic renin- angiotensin system (RAS) mediates some of these responses, the possible contributions of local glomerular and proximal tubule RASs in these adaptations have not been examined. Thus, in this study, glomeruli and proximal tubules were microdissected from rats adapted to high (4.0%)-, normal (0.5%), or low (0.01%)-NaCl diets, and renin mRNA was measured using quantitative competitive reverse transcription-polymerase chain reaction. After 4 days of the diets, glomerular renin mRNA abundance was increased 100% by the low-NaCl diet (P < 0.05) and suppressed 50% (P < 0.01) by the high- NaCl diet compared with controls. Renin mRNA in proximal tubules was stimulated 230% (P < 0.05) by the low-NaCl diet and tended to be suppressed (68% decrease, not significant) by the high-NaCl diet. When the high-NaCl diet was continued for 2 wk, proximal tubule renin mRNA was suppressed by 89% (P < 0.05). This study provides evidence that glomerular and proximal tubule renin transcript levels are regulated by chronic changes in dietary NaCl, suggesting that local RASs contribute to the renal adaptations in response to chronic alterations in NaCl.

    Original languageEnglish (US)
    Pages (from-to)F892-F898
    JournalAmerican Journal of Physiology - Renal Physiology
    Issue number6 42-6
    StatePublished - Dec 1997


    • Autocrine renin-angiotensin system
    • Blood pressure
    • Extracellular fluid volume

    ASJC Scopus subject areas

    • Urology
    • Physiology


    Dive into the research topics of 'Regulation of glomerular and proximal tubule renin mRNA by chronic changes in dietary NaCl'. Together they form a unique fingerprint.

    Cite this