Abstract
The complex mixture of lipids and proteins of the red blood cell membrane is well maintained during the life of the cell. Lipid analysis of the red cell reveals hundreds of phospholipid molecular species and cholesterol that differ with respect to their (polar) head group, and (apolar) side chains. These molecules move rapidly in the plane, as well as across the lipid bilayer. This dynamic movement is highly organized. In the plane of the bilayer, areas enriched in certain lipids accommodate protein structure and modulate function. While lipids move across the bilayer, the organization is highly asymmetric. Amino phospholipids are mainly found on the inside and choline containing phospholipids on the outside. Both the composition and organization of the red cell membrane is maintained throughout the life of the red cell by an intricate mechanism that involves enzymes, transporters and cytosolic factors. Key proteins that maintain red blood cell lipid organization have recently been identified. Alterations in these mechanisms, as the result of the globin mutations in sickle cell disease or thalassemia will lead to loss of membrane viability, apoptosis during erythropoiesis, early demise of the cell in the circulation, and when these cells are not removed appropriately their presence has pathologic consequences.
Current Molecular Medicine
Title: Red Cell Membrane Lipids in Hemoglobinopathies
Volume: 8 Issue: 7
Author(s): Frans A. Kuypers
Affiliation:
Abstract: The complex mixture of lipids and proteins of the red blood cell membrane is well maintained during the life of the cell. Lipid analysis of the red cell reveals hundreds of phospholipid molecular species and cholesterol that differ with respect to their (polar) head group, and (apolar) side chains. These molecules move rapidly in the plane, as well as across the lipid bilayer. This dynamic movement is highly organized. In the plane of the bilayer, areas enriched in certain lipids accommodate protein structure and modulate function. While lipids move across the bilayer, the organization is highly asymmetric. Amino phospholipids are mainly found on the inside and choline containing phospholipids on the outside. Both the composition and organization of the red cell membrane is maintained throughout the life of the red cell by an intricate mechanism that involves enzymes, transporters and cytosolic factors. Key proteins that maintain red blood cell lipid organization have recently been identified. Alterations in these mechanisms, as the result of the globin mutations in sickle cell disease or thalassemia will lead to loss of membrane viability, apoptosis during erythropoiesis, early demise of the cell in the circulation, and when these cells are not removed appropriately their presence has pathologic consequences.
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Cite this article as:
Kuypers A. Frans, Red Cell Membrane Lipids in Hemoglobinopathies, Current Molecular Medicine 2008; 8 (7) . https://dx.doi.org/10.2174/156652408786241429
DOI https://dx.doi.org/10.2174/156652408786241429 |
Print ISSN 1566-5240 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5666 |
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