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Related Experiment Videos

[Angiotensin II regulates klotho gene expression].

Nobukazu Ishizaka1, Haruo Mitani, Ryozo Nagai

  • 1Department of Cardiovascular Medicine, University of Tokyo, Graduate School of Medicine.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|October 26, 2002
PubMed
Summary

Angiotensin II lowers klotho gene expression in kidneys, contributing to organ damage. Restoring klotho levels may protect against this damage, offering potential therapeutic strategies for kidney disease.

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Area of Science:

  • Nephrology
  • Endocrinology
  • Molecular Biology

Background:

  • The klotho gene suppresses aging-associated phenotypes.
  • Angiotensin II plays a role in kidney disease progression.
  • The interaction between angiotensin II and klotho gene expression is not fully understood.

Purpose of the Study:

  • To investigate the regulation of klotho gene expression by angiotensin II.
  • To determine the role of angiotensin II-induced klotho downregulation in end-organ damage.
  • To explore the potential therapeutic effects of klotho gene augmentation.

Main Methods:

  • Continuous infusion of angiotensin II in a preclinical model.
  • Assessment of renal klotho gene expression.
  • Administration of adenovirus harboring the mouse klotho gene (ad-klotho).

Related Experiment Videos

  • Evaluation of renal function markers (creatinine clearance, urinary protein excretion) and tubulointerstitial damage.

    • Main Results:

    • Continuous angiotensin II infusion downregulated renal klotho gene expression.
    • This downregulation was dependent on the AT1 receptor but independent of blood pressure.
    • Intravenous administration of ad-klotho improved creatinine clearance, reduced urinary protein, and ameliorated tubulointerstitial damage.

    Conclusions:

    • Downregulation of renal klotho gene expression by angiotensin II may contribute to angiotensin II-induced end-organ damage.
    • Augmenting klotho levels shows potential in mitigating angiotensin II-induced kidney injury.
    • Targeting the klotho-angiotensin II axis could be a novel therapeutic strategy for kidney protection.