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Globin synthesis in uraemia

H W Leber, C Baumgarten, G Goubeaud

    Proceedings of the European Dialysis and Transplant Association. European Dialysis and Transplant Association
    |January 1, 1976
    PubMed
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    Globin synthesis rates are normal in chronic kidney disease patients but elevated in acute bleeding. Uremic toxins like guanidinosuccinic acid inhibit globin synthesis.

    Area of Science:

    • Biochemistry
    • Hematology
    • Nephrology

    Background:

    • Anemia is common in patients with chronic kidney disease (CKD).
    • The impact of uremic toxins on red blood cell production is not fully understood.
    • Globin synthesis is a critical component of red blood cell formation.

    Purpose of the Study:

    • To investigate globin synthesis rates in patients undergoing chronic intermittent hemodialysis.
    • To compare globin synthesis in CKD patients with those suffering from anemia of chronic disease and acute bleeding.
    • To identify specific uremic substances that may inhibit globin synthesis.

    Main Methods:

    • Red blood cells were incubated with a balanced amino acid mixture and 14C-Histidine.
    • Globin was isolated from the hemolysate, and 14C-incorporation rate was measured.

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  • Substances retained in renal failure were added to the incubation mixture to assess their effect on globin synthesis.

    • Main Results:

    • Globin synthesis rates did not differ between patients on chronic intermittent hemodialysis, patients with anemia of chronic disease, and healthy subjects.
    • Patients with acute bleeding showed significantly higher 14C-incorporation rates due to increased reticulocyte counts.
    • Guanidinosuccinic acid, methylguanidine, and specific peptides (1200-1400 MW) from uremic serum and normal urine markedly inhibited globin synthesis.

    Conclusions:

    • Chronic hemodialysis does not impair basal globin synthesis.
    • Acute bleeding increases globin synthesis, likely a compensatory mechanism.
    • Certain uremic toxins and retained substances inhibit globin synthesis, potentially contributing to anemia in renal failure.