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Red blood cells wit...
Red blood cells with elevated cytoplasmic Ca2+ are primarily taken up by splenic marginal zone macrophages and CD207+dendritic cells
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- Larsson, Anders (författare)
- Umeå universitet,Institutionen för integrativ medicinsk biologi (IMB)
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- Hult, Andreas (författare)
- Umeå universitet,Idrottsmedicin
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- Nilsson, Anna (författare)
- Umeå universitet,Institutionen för integrativ medicinsk biologi (IMB)
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- Olsson, Mattias (författare)
- Umeå universitet,Institutionen för integrativ medicinsk biologi (IMB)
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- Oldenborg, Per-Arne (författare)
- Umeå universitet,Institutionen för integrativ medicinsk biologi (IMB)
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(creator_code:org_t)
- 2016-04-19
- 2016
- Engelska.
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Ingår i: Transfusion. - : Wiley. - 0041-1132 .- 1537-2995. ; 56:7, s. 1834-1844
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- BACKGROUND: The normal red blood cell (RBC) life span may be significantly reduced when RBCs are stored under blood bank conditions, resulting in a reduced 24-hour survival after transfusion. The damage of stored RBCs is probably multifactorial as stored RBCs share features of both senescence and suicidal RBC death (eryptosis). Since an increased intracellular Ca2+ concentration ([Ca2+](i)) is one key feature of eryptosis, we here investigated if stored human RBCs had increased [Ca2+](i) and the mechanisms behind uptake of such RBCs in a murine model.STUDY DESIGN AND METHODS: The intracellular Ca2+ content of RBCs was determined using the Ca2+ probe Fluo-3 and flow cytometry. In vivo uptake of Ca2+ ionophore-treated murine RBCs (Ca2+-RBCs) was investigated in recipient mice, using flow cytometry and immunohistochemical analysis.RESULTS: A small fraction of human RBCs accumulated [Ca2+](i) during storage for up to 42 days under blood bank conditions. In a murine model, where fresh or Ca2+-RBCs were transfused, Ca2+-RBCs were mainly trapped by MARCO+ splenic marginal zone macrophages and CD11c+ CD207+ dendritic cells (DCs) within 1 hour after transfusion. In marked contrast, freshly transfused RBCs aging normally in circulation were cleared much slower and preferentially by F4/80+ red pulp macrophages. CD47 on the Ca2+-RBCs did not affect their clearance by splenic phagocytic cells.CONCLUSIONS: A small fraction of RBCs accumulate [Ca2+](i) during storage, and in a murine model such RBCs are recognized by splenic macrophages and DCs in ways similar to what has been reported for nucleated apoptotic cells.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Hematologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Hematology (hsv//eng)
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- ref (ämneskategori)
- art (ämneskategori)
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