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Related Experiment Videos

Suramin administration is associated with a decrease in serum calcium levels.

M M Walther1, N N Rehak, D Venzon

  • 1Urologic Oncology Branch, DCS/NCI/NIH, Bethesda, MD 20892-1501, USA. macw@nih.gov

World Journal of Urology
|February 24, 2001
PubMed
Summary
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Suramin treatment in patients with hormone-refractory prostate cancer consistently lowered serum calcium levels. This effect was observed in two patient groups and did not interfere with calcium measurement assays.

Area of Science:

  • Oncology
  • Pharmacology
  • Clinical Chemistry

Background:

  • In vitro studies suggest suramin affects bone resorption.
  • The clinical impact of suramin on serum calcium in patients remains unclear.
  • Hormone-refractory prostate cancer presents unique challenges in patient management.

Purpose of the Study:

  • To investigate the clinical effect of suramin treatment on total serum calcium levels.
  • To determine if suramin administration leads to hypocalcemia in patients with prostate cancer.
  • To assess the reliability of calcium determination assays in the presence of suramin.

Main Methods:

  • Two groups of patients with hormone-refractory prostate cancer were studied (n=28 and n=72).
  • Serum calcium levels were measured before, during, and after suramin treatment.

Related Experiment Videos

  • Calcium controls spiked with suramin were analyzed using three commercial assays.

    • Main Results:

    • Both patient groups showed a significant decrease in serum calcium after suramin treatment (P < 0.0001 and P = 0.0005).
    • Albumin-corrected calcium levels also decreased significantly post-treatment.
    • Suramin did not interfere with calcium measurements in the tested assays.
    • Patients treated longer with suramin had lower calcium levels.

    Conclusions:

    • Suramin treatment is consistently associated with a decrease in serum calcium in patients with hormone-refractory prostate cancer.
    • The observed hypocalcemic effect of suramin is clinically relevant.
    • Standard calcium assays are reliable for monitoring patients on suramin therapy.