Journal
JOURNAL OF NEUROCHEMISTRY
Volume 121, Issue 5, Pages 785-792Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1471-4159.2012.07716.x
Keywords
CD163; haptoglobin; hemoglobin scavenging; perivascular macrophage; subarachnoid hemorrhage; vasospasm
Categories
Funding
- Peel Medical Research Trust
- Academy of Medical Sciences/Wellcome Trust
- IQ Products industrial sponsorship
Ask authors/readers for more resources
J. Neurochem. (2012) 121, 785792. Abstract Delayed cerebral ischemia resulting from extracellular hemoglobin is an important determinant of outcome in subarachnoid hemorrhage. Hemoglobin is scavenged by the CD163-haptoglobin system in the circulation, but little is known about this scavenging pathway in the human CNS. The components of this system were analyzed in normal cerebrospinal fluid and after subarachnoid hemorrhage. The intrathecal presence of the CD163-haptoglobinhemoglobin scavenging system was unequivocally demonstrated. The resting capacity of the CD163-haptoglobinhemoglobin system in the normal CNS was 50 000-fold lower than that of the circulation. After subarachnoid hemorrhage, the intrathecal CD163-haptoglobinhemoglobin system was saturated, as shown by the presence of extracellular hemoglobin despite detectable haptoglobin. Hemoglobin efflux from the CNS was evident, enabling rescue hemoglobin scavenging by the systemic circulation. Therefore, the CNS is not capable of dealing with significant intrathecal hemolysis. Potential therapeutic options to prevent delayed cerebral ischemia ought to concentrate on augmenting the capacity of the intrathecal CD163-haptoglobinhemoglobin scavenging system and strategies to encourage hemoglobin efflux from the brain.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available