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  • Title: Urinary hydroxyproline and serum alkaline phosphatase in sickle cell disease.
    Author: Mohammed SM, Suleiman SA, Addae SK, Annobil SH, Adzaku FK, Kadoummi OF, Richards JT.
    Journal: Clin Chim Acta; 1991 Dec 16; 203(2-3):285-94. PubMed ID: 1777988.
    Abstract:
    Serum alkaline phosphatase, alkaline phosphatase isoenzymes, and urinary hydroxyproline excretion were studied in 20 young adult sickle cell patients and 58 matching normal controls. Total alkaline phosphatase was significantly higher in the sickle cell patients than in controls. Heat inactivation test and isoenzyme electrophoresis indicated that bone is the predominant isoenzyme in patients. Hydroxyproline excretion was significantly higher in the sickle cell patients than in controls. Serum total alkaline phosphatase correlated well with urinary hydroxyproline excretion in sickle cell patients (r = 0.73). Both alkaline phosphatase and hydroxyproline increased with age in the sickle cell patients. This study suggests that delayed growth and/or bone destruction may contribute to the elevated levels of alkaline phosphatase and urinary hydroxyproline.
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