Abstract:
BACKGROUND:In experimental pneumonia we found that transfused older blood increased mortality and lung injury that was associated with increased in vivo hemolysis and elevated plasma cell-free hemoglobin (CFH), non-transferrin-bound iron (NTBI), and plasma labile iron (PLI) levels. In this study, we additionally analyze identically treated animals that received lower or higher bacterial doses. STUDY DESIGN AND METHODS:Two-year-old purpose-bred beagles (n = 48) challenged intrabronchially with Staphylococcus aureus (0 [n = 8], 1.0 × 10(9) [n = 8], 1.25 × 10(9) [n = 24], and ≥1.5 × 10(9) [n = 8] colony-forming units/kg) were exchange transfused with either 7- or 42-day-old canine universal donor blood (80 mL/kg in four divided doses). RESULTS:The greater increases in CFH with older blood over days after exchange proved relatively independent of bacterial dose. The lesser increases in CFH observed with fresher blood were bacterial dose dependent potentially related to bacterial hemolysins. Without bacterial challenge, levels of CFH, NTBI, and PLI were significantly higher with older versus fresher blood transfusion but there was no significant measurable injury. With higher-dose bacterial challenge, the elevated NTBI and PLI levels declined more rapidly and to a greater extent after transfusion with older versus fresher blood, and older blood was associated with significantly worse shock, lung injury, and mortality. CONCLUSION:The augmented in vivo hemolysis of transfused older red blood cells (RBCs) appears to result in excess plasma CFH and iron release, which requires the presence of established infection to worsen outcome. These data suggest that transfused older RBCs increase the risks from infection in septic subjects.
journal_name
Transfusionjournal_title
Transfusionauthors
Wang D,Cortés-Puch I,Sun J,Solomon SB,Kanias T,Remy KE,Feng J,Alimchandani M,Quezado M,Helms C,Perlegas A,Gladwin MT,Kim-Shapiro DB,Klein HG,Natanson Cdoi
10.1111/trf.12607subject
Has Abstractpub_date
2014-07-01 00:00:00pages
1712-24issue
7eissn
0041-1132issn
1537-2995journal_volume
54pub_type
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