Blood Aging, Safety, and Transfusion: Capturing the “Radical” Menace
- 1 May 2011
- journal article
- review article
- Published by Mary Ann Liebert Inc in Antioxidants and Redox Signaling
- Vol. 14 (9), 1713-1728
- https://doi.org/10.1089/ars.2010.3447
Abstract
Throughout their life span, circulating red blood cells (RBCs) transport oxygen (O2) primarily from the lungs to tissues and return with carbon dioxide (CO2) from respiring tissues for final elimination by lungs. This simplistic view of RBCs as O2 transporter has changed in recent years as other gases, for example, nitric oxide (NO), and small molecules, such as adenosine triphosphate (ATP), have been shown to either be produced and/or carried by RBCs to perform other signaling and O2 sensing functions. In spite of the numerous biochemical and metabolic changes occurring within RBCs during storage, prior to, and after transfusion, perturbations of RBC membrane are likely to affect blood flow in the microcirculation. Subsequent hemolysis due to storage conditions and/or hemolytic disorders may have some pathophysiological consequences as a result of the release of Hb. In this review, we show that evolution has provided a multitude of protection and intervention strategies against free Hb from “cradle” to “death”; from early biosynthesis to its final degradation and a lot more in between. Furthermore, some of the same naturally occurring protective mechanisms can potentially be employed to oxidatively inactivate this redox active protein and control its damaging side reactions when released outside of the RBC. Antioxid. Redox Signal. 14, 1713–1728.Keywords
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