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Cadmium induced hypertension.

V N Puri1

  • 1Division of Pharmacology, Central Drug Research, Institute Lucknow.

Clinical and Experimental Hypertension (New York, N.Y. : 1993)
|March 3, 1999
PubMed
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Cadmium exposure, whether intravenous or intracerebroventricular, significantly increases blood pressure in rats, leading to hypertension. This hypertensive effect is dose-dependent and can persist for up to two weeks.

Area of Science:

  • Toxicology
  • Cardiovascular Physiology
  • Neuropharmacology

Background:

  • Cadmium is a toxic heavy metal with known cardiovascular effects.
  • Understanding cadmium's impact on blood pressure regulation is crucial for public health.
  • Previous studies suggest cadmium may influence blood pressure, but routes of administration and duration effects require further investigation.

Purpose of the Study:

  • To investigate the hypertensive effects of cadmium acetate administered via intravenous (i.v.) and intracerebroventricular (i.c.v.) routes in rats.
  • To determine the dose and time dependency of cadmium-induced hypertension.
  • To assess the duration of the hypertensive response after repeated cadmium exposure.

Main Methods:

  • Male Sprague-Dawley rats were anesthetized with urethane.

Related Experiment Videos

  • Cadmium acetate was administered intravenously (i.v.) at doses of 0.32, 1.0, and 3.2 mg/kg.
  • Cadmium acetate was administered intracerebroventricularly (i.c.v.) at doses of 1, 3.2, and 10 microg.
  • Repeated administration (1 mg/kg i.p. for 5 days) was followed by blood pressure monitoring at various intervals post-treatment.

    • Main Results:

    • Intravenous cadmium injection caused a transient drop followed by a sustained increase in blood pressure.
    • Intracerebroventricular cadmium administration resulted in a statistically significant hypertensive response (p<0.01).
    • Repeated intraperitoneal cadmium administration led to elevated blood pressure, with significant increases observed up to 10 days after cessation of treatment.

    Conclusions:

    • Cadmium exposure through both i.v. and i.c.v. routes induces a hypertensive response in rats.
    • The hypertensive effects of cadmium are dose-dependent and can persist for approximately two weeks.
    • These findings highlight the significant cardiovascular risks associated with cadmium exposure.