Abstract
Zinc deficiency causes dysgeusia and dermatitis as well as anemia. As approximately half of dialysis patients have zinc deficiency, zinc supplementation should be considered in case of erythropoiesis-stimulating agent (ESA)-hyporesponsive anemia. We report a case of a chronic dialysis patient with copper deficiency anemia caused by standard-dose zinc supplementation. The patient was a 70-year-old woman who had received maintenance hemodialysis for 8 years due to diabetic nephropathy. She had been treated with weekly administration of darbepoetin 30 μg for renal anemia, which resulted in Hb 12 to 14 g/dL. She had no dysgeusia. When zinc deficiency (44 μg/dL) had been identified 4 months earlier, 50 mg daily zinc acetate hydrate (Nobelzin®), which is the standard dose, was started. Unexpectedly, her anemia progressed slowly with macrocytosis together with granulocytopenia. Her platelet count did not decrease at that time. Laboratory tests revealed a marked decrease of serum copper (< 4 μg/dL) and ceruloplasmin (< 2 mg/dL), although serum zinc was within the normal limit (125 μg/dL). We discontinued zinc acetate and started copper supplementation including cocoa for 1 month. Her anemia and granulocytopenia were dramatically restored coincident with the increase in both serum copper and ceruloplasmin. Copper supplementation also improved her iron status as assessed by transferrin saturation and ferritin. Clinicians should monitor both zinc and copper status in anemic dialysis patients during zinc supplementation, as both are important to drive normal hematopoiesis.
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Abbreviations
- ESA:
-
Erythropoiesis-stimulating agent
- CRP:
-
C-reactive protein
- DMT1:
-
Divalent metal transporter 1
- CTR1:
-
Copper transporter 1
- ATP7A:
-
ATPase copper transporting alpha
- ZIP4:
-
Zrt/Irt-like protein 4
- ZnT1:
-
Zinc transporter 1
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We thank the dialysis staff at Ikeda Clinic.
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TW wrote the manuscript with the support of TT. SY, HI, and KK treated the patient while being supported by TT. TW presented this case at the Sixty-eighth Japanese Society of Dialysis Therapy meeting.
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Watanabe, T., Yonemoto, S., Ikeda, Y. et al. Copper deficiency anemia due to zinc supplementation in a chronic hemodialysis patient. CEN Case Rep (2024). https://doi.org/10.1007/s13730-024-00862-6
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DOI: https://doi.org/10.1007/s13730-024-00862-6