Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Cole, D.J. et al.

Effect of oncotic pressure of diaspirin cross-linked hemoglobin (DCLHb) on brain injury after temporary focal cerebral ischemia in rats.

Previous studies have shown that diaspirin cross-linked hemoglobin (DCLHb, 10 g/dL) decreases cerebral ischemia and the resultant injury in a dose-dependent manner, requiring large volumes of DCLHb for maximum efficacy. We assessed the effect of a more concentrated (20 g/dL) and more hyperoncotic preparation of DCLHb on cerebral infarction volume. Immediately after middle cerebral artery occlusion, rats were randomized to one of the following groups: Control, hematocrit not manipulated; 10/Hb, hematocrit decreased to 30% with 10% DCLHb (oncotic pressure 43 mm Hg); 7.5/ Alb, hematocrit decreased to 30% with 7.5% albumin (oncotic pressure 43 mm Hg); 20/Hb, the same dose of DCLHb (20%, oncotic pressure 129 mm Hg) as the 10/HB group (half the volume); or 15/ Alb, the same dose of albumin (15%, oncotic pressure 130 mm Hg) as the 7.5/ Alb group half the volume). After 90 min of ischemia, 72 h of reperfusion was allowed. Infarction volume (mm3, mean +/- sd) was less in the DCLHb groups (10/Hb = 79 +/- 17; 20/HB = 51 +/- 14) than the oncotically matched albumin groups (7.5/ Alb = 124 +/- 21; 15/ Alb = 85 +/- 18) and the Control group (135 +/- 17) (P < 0.05). These data indicate that in this model of cerebral ischemia, DCLHb decreases ischemic brain injury more effectively than albumin, and that a hyperoncotic preparation of DCLHb is preferable.[1]

References

Effect of oncotic pressure of diaspirin cross-linked hemoglobin (DCLHb) on brain injury after temporary focal cerebral ischemia in rats. Cole, D.J., Drummond, J.C., Patel, P.M., Nary, J.C., Applegate, R.L. Anesth. Analg. (1996) [Pubmed]

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