PubMed: 27515135

Title
Haptoglobin or Hemopexin Therapy Prevents Acute Adverse Effects of Resuscitation After Prolonged Storage of Red Cells.
Journal
Circulation
Volume
134
Issue
None
Pages
945-60
Date
2016-09-27
Authors
Liu Y | Graw JA | Zapol WM | Bloch DB | Bonventre JV | Colvin RB | Malhotra R | Mayeur C | Rechester O | Riley FE | Rosales I | Sabbisetti VS | Warren HS

Evidence 3e7f0fea93

Tissue iron staining revealed greater cortical iron accumulation in the kidneys of mice resuscitated with SRBCs, SRBCs combined with albumin and SRBCs combined with hemopexin than in the kidneys of mice transfused with FRBCs (Figure 6A and B).

Evidence 2cef310dce

Splenic iron content was greater in mice after resuscitation with SRBCs than in FRBC-transfused mice.

Evidence 0c6e1f1467

Taken together, these results indicate that haptoglobin co-transfusion prevented stored blood transfusion-associated renal iron uptake and led to increased weight and greater iron- accumulation in the spleens of mice.

Evidence d1e8be6066

Only transfusion of SRBCs and haptoglobin prevented SRBC-induced renal iron accumulation (Figure 6A and B).

Evidence e4195e5513

In comparison to mice transfused with SRBCs alone, the spleens of mice resuscitated with SRBCs and haptoglobin contained more iron (Figure 6D).

Evidence 4e72db901d

Plasma hemoglobin scavenges nitric oxide and causes vasoconstriction, platelet aggregation and inflammation9,22–24.

Evidence ae16b3b1a0

Toxicity of free hemoglobin is also caused by the release of cell-free heme, which produces lipid peroxidation and mitochondrial damage and increases the production of reactive oxygen species.

Evidence e6ff4547ad

Cell-free heme selectively triggers pro-inflammatory receptors such as TLR-4 and BACH-1, and activates proteasomes25.

Evidence ebfc4c9fb5

The increase in hemopexin was associated with decreased plasma heme levels (Figure 3I).

Evidence 70df395f8b

These results demonstrate that transfusion with SRBCs and simultaneous infusion of exogenous hemopexin results in decreased levels of circulating cell-free heme.

Evidence 3c78c9ecd7

The plasma hemoglobin levels at two and four hours after SRBC-transfusion were greater than the cell-free hemoglobin levels in the supernatant of the SRBCs before transfusion (Figure 1C, Supplemental Table I), providing evidence that hemolysis occurs in vivo during and after transfusion of SRBCs.

Evidence f35204936d

Hemoglobinuria was noted in mice resuscitated with SRBCs alone but not mice resuscitated with FRBCs or sham-treated mice (Figure 4A and B).

Evidence fb65e19336

In mice resuscitated with SRBCs, plasma hemoglobin levels were greater than in mice resuscitated with FRBCs or in sham-treated mice at two, four, and 24 hours after transfusion (Figure 1C).

Evidence 69f2b627e9

After resuscitation with SRBCs, only 58% of mice survived for 48 hours (SRBC vs. FRBC, P<0.05).

Evidence 6a41e2f7ac

In animals resuscitated with SRBCs, plasma hemopexin levels significantly decreased from 147.1±11.4 mg/dl at baseline to 86.7±12.2 and 76.3±5. 4 mg/dl at two and four hours after resuscitation, respectively (p<0.05 for both, Figure 2A).

Evidence dae193c772

The increase in plasma haptoglobin levels from baseline to 48 hours after resuscitation was less in mice transfused with SRBCs compared to mice transfused with FRBCs (P<0.001).

Evidence 06276d732e

Markers of renal damage, including kidney KIM-1 and NGAL mRNA levels, urinary KIM-1 protein levels, and plasma NGAL concentration, were greater in mice after resuscitation with SRBCs or SRBCs and albumin than in mice transfused with FRBCs (Figures 4C–F).

Evidence 55c239c8ad

Kidney sections of mice resuscitated with SRBCs showed more cortical Ki-67 positive cells per 20× field (1.08 mm field diameter) than those of mice resuscitated with FRBCs (SRBC vs. FRBC: 156.2±10.4 vs. 56.4±4.7, p<0.01).

Evidence 9460dbe154

Liver damage, measured by plasma levels of alanine transaminase (ALT) and aspartate transaminase (AST) at 48 hours after resuscitation, was greater after resuscitation with SRBCs compared to resuscitation with FRBCs (Figure 6E and F).

Evidence 3c8ee2310d

In contrast, all of the mice survived after SRBC-transfusion and treatment with hemopexin (SRBC+Hx vs. SRBC+Alb, P=0.018). Similarly the survival rate of mice resuscitated with SRBCs and co-infusion of haptoglobin was 96% (SRBC+Hp vs. SRBC+Alb, P=0.030).

Evidence ea65be9de3

Tubular regeneration, an indirect marker of tubular injury, was assessed by quantification of the number of Ki-67-positive renal tubular cells at 48 hours after resuscitation and by measuring the level of Ki-67 mRNA in kidney tissue (Figures 5C–E).

Evidence 64bb00e88d

Co-administration of haptoglobin with SRBCs results in a prolonged increase in plasma hemoglobin levels for more than 48 hours after transfusion.

Evidence 44efc3b3fb

Infusion of hemopexin together with SRBCs resulted in a 6.4-fold (95% CI [5.2 – 7.6]) increase in plasma hemopexin levels at four hours after transfusion (Figure 3D).

Evidence b7244f2bf4

Resuscitation with SRBCs together with albumin did not alter plasma levels of hemoglobin, hemopexin, haptoglobin, or heme as compared to resuscitation with SRBCs alone (Figure 3C–E, I, Supplemental Material and Supplemental Figure II A–B).

Evidence 29a1622a85

The renal expression level of IL-6 was greater 48 hours after resuscitation with SRBCs alone, SRBC and albumin, and SRBCs and hemopexin when compared to resuscitation with FRBCs (Supplemental Figure VI D).

Evidence 5abfbffcd0

Mice that were resuscitated with SRBCs and albumin or SRBCs and hemopexin showed a marked increase in HO-1 expression when compared to mice resuscitated with FRBCs.

Evidence fde4caccec

Hemoglobinuria was present in mice resuscitated with SRBCs combined with albumin or hemopexin but not in mice resuscitated with SRBCs combined with haptoglobin (Figure 4A and B).

Evidence a89ada69b5

Co-infusion of haptoglobin but not albumin or hemopexin prevented SRBC-induced hemoglobinuria and kidney injury at 48 hours after resuscitation from hemorrhagic shock.

Evidence 0f538fe7e7

However, kidney KIM-1 and NGAL mRNA levels, urinary KIM-1 protein levels and NGAL plasma concentrations in mice transfused with SRBCs and haptoglobin were lower than in mice transfused with SRBCs given a co-infusion of albumin (Figures 4C–F).

Evidence 7e8612fd3b

The number of Ki-67 positive cells in kidneys from mice that received SRBCs and haptoglobin was similar to the number of Ki-67 positive cells in kidneys from mice that received FRBCs..

Evidence 5005b6ac7e

Resuscitation with SRBCs and haptoglobin prevented the increase in SRBC-induced renal HO-1 expression (Figure 7F).

Evidence 445f8d5c4d

Without adjusting for multiple comparison testing, IL-6 expression was lower in kidneys of mice resuscitated with SRBCs and haptoglobin compared to mice resuscitated with SRBCs and albumin (P<0.05).

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