INTERPRETATION OF HEMOLYSIS TESTS FOLLOWING ADMINISTRATION OF A SECOND-GENERATION HEMOGLOBIN-BASED OXYGEN CARRIER

被引:6
作者
Drieghe, S. [1 ]
Stove, V [1 ]
Decruyenaere, J. [2 ]
Delanghe, J. [1 ]
机构
[1] Ghent Univ Hosp, Dept Lab Med, Ghent, Belgium
[2] Ghent Univ Hosp, Dept Intens Care Med, Ghent, Belgium
关键词
PHP; hemopexin; CD; 163; hemoglobin scavenging; NITRIC-OXIDE; SCAVENGER; IDENTIFICATION; HEMOPEXIN;
D O I
10.2143/ACB.3309
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Hemoglobin released into the circulation during hennolysis or therapy with chemically modified hemoglobins, exert oxidative and NO-scavenging toxic effects. Pyridoxalated hemoglobin polyoxyethylene conjugate (PHP) is one of the second-generation hemoglobin-based oxygen carriers (HBOCs). We wanted to investigate the metabolism of PHP with a special focus on its consequences for interpreting hemolysis-related diagnostic parameters in PHP-treated patients. Clinical samples were analyzed from 3 patients, who received PHP (as part of the PHOENIX phase III trial) for treatment of catecholamine-resistant distributive shock. In contrast to expectations, clearance of PHP by hemopexin, instead of haptoglobin was documented by increased hemolysis indices, absence of decreased haptoglobin values, presence of free PHP-hemoglobin and exhausted hemopexin concentrations. The present case report is important for both clinicians and laboratorians since it nicely illustrates that a hemolytic aspect of plasma is not necessarely synonymous with hemolysis. A hemolytic aspect of plasma or serum (high hemolysis index) in combination with normal or increased haptoglobin values should draw the attention; additional determination of lactate dehydrogenase and hemopexin may then be useful to distinguish the condition from in vitro hemolysis and to monitor the in vivo elimination of the heme compounds.
引用
收藏
页码:282 / 286
页数:5
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