Diethylenetriaminopentaacetic acid is unsuitable for long-term preservation of RBCs.

Abstract:

BACKGROUND:The addition of an appropriate metal chelator, such as diethylenetriaminopentaacetic acid (DTPA) to stored blood has been shown to be effective in a short-term (0-12 days) prevention of lipid peroxidation of stored RBCS: However, its long-term effectiveness has not been carefully evaluated. STUDY DESIGN AND METHODS:Blood was preserved in simulated blood bank conditions with or without the addition of DTPA for 4 weeks. Aliquots of stored blood were taken weekly from the storage bag and the deformability profile was determined using a custom-built laser viscodiffractometer. Malondialdehyde (MDA), an index of lipid peroxidation, and the extent of vesiculation of the stored blood were quantified concurrently. RESULTS:It was found that MDA values for DTPA-supplemented blood at the end of a 28-day storage period were significantly elevated compared with the DTPA-free counterpart (23.50 +/- 3.2 vs. 16.10 +/- 2.5 microM; p<0.05). In addition, DTPA-supplemented blood was more susceptible to vesiculation than its DTPA-free counterpart (31.26 +/- 4.1 vs. 10.26 +/- 1.5% of acetyl cholinesterase release, p<0.001). These data are also in accordance with the finding of the deformability profile result, indicating that DTPA-supplemented blood exhibits not only a decrease in deformability index, but also a tendency to shift the profile to a lower osmolality compared with that of controls (a dehydration phenomenon). CONCLUSION:Long-term (0-28 days) preservation of human RBCs with DTPA caused a gradual increase in MDA production, a progressive enhancement of the severity of vesiculation, and an alteration in the deformability profile. Free-radical-mediated oxidative damage is likely to be the culprit for this observed phenomenon. In addition, the direct effect of DTPA on RBC structural integrity must be considered.

journal_name

Transfusion

journal_title

Transfusion

authors

Liu TZ,Chiu DT,Stern A

doi

10.1046/j.1537-2995.2001.41040556.x

subject

Has Abstract

pub_date

2001-04-01 00:00:00

pages

556-9

issue

4

eissn

0041-1132

issn

1537-2995

journal_volume

41

pub_type

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