Sickle Cell Anemia
Sickle Cell Anemia - Related Videos
05:23
Continuous Manual Exchange Transfusion for Patients with Sickle Cell Disease: An Efficient Method to Avoid Iron Overload
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Cited by 4 •
2017
We have outlined a method of continuous manual exchange transfusion for the treatment of sickle cell disease in patients. This safe protocol was designed to effectively limit iron overload in patients in need of chronic transfusions and can be used extensively without any special equipment.
08:23
Characterization of Sickling During Controlled Automated Deoxygenation with Oxygen Gradient Ektacytometry
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Cited by 16 •
2019
Here, we present oxygen gradient ektacytometry, a rapid and reproducible method to measure red blood cell deformability in samples from patients with sickle cell disease under controlled deoxygenation and reoxygenation. This technique provides a way to study red blood cell sickling and to monitor sickle cell disease treatment efficacy.
05:35
A Point-of-Care Method with Integrated Decision Support Tool to Estimate Anemia at Population Level
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Cited by 3 •
2024
An accurate hemoglobin estimation method is lacking at the point of care and may hinder population-based programs for treating anemia. Therefore, we developed a point-of-care method based on pooled capillary blood and an auto-analyzer integrated into a custom software application to categorize the hemoglobin values into different grades of anemia.
09:30
Mesenchymal Stem Cell Isolation from Pulp Tissue and Co-Culture with Cancer Cells to Study Their Interactions
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Cited by 10 •
2019
We provide protocols for evaluation of mesenchymal stem cells isolated from dental pulp and prostate cancer cell interactions based on direct and indirect co-culture methods. Condition medium and trans-well membranes are suitable to analyze indirect paracrine activity. Seeding differentially stained cells together is an appropriate model for direct cell-cell interaction.
02:41
Protein Complex Assembly
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2020
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types. Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes. Many viruses self-assemble into a fully functional unit using the infected host cell to...
FAQs
Low oxygen levels can trigger hemoglobin S to polymerize, meaning the abnormal hemoglobin molecules form rigid structures inside red blood cells. This molecular change distorts the cells and reduces their flexibility. Understanding oxygen-dependent polymerization explains why changes in oxygen conditions can connect a molecular event to altered cell shape, impaired blood flow, and disease symptoms.
Rigid sickle-shaped cells can obstruct blood vessels because they do not move through the circulation as easily as healthy, flexible red blood cells. At the same time, their abnormal structure promotes premature destruction. These two effects reduce effective blood flow and shorten red-cell survival, linking cellular behavior to anemia and possible organ damage.
The HBB mutation produces hemoglobin S, which changes how hemoglobin behaves when oxygen levels fall. Polymerization then alters red-cell shape and flexibility, allowing cellular changes to affect circulation. Vessel blockage and premature red-cell destruction provide the intermediate steps connecting a change in genetic information to reduced oxygen transport, anemia, and organ injury.
Diagnostic testing can help identify the abnormal hemoglobin and the inherited blood disorder associated with it. In biology and medicine, this information connects genetic changes with red-cell behavior and clinical consequences. Testing therefore supports recognition of the condition and helps place later treatment decisions in the context of abnormal hemoglobin, blood flow, and anemia.
The disorder provides a biological model for examining how hemoglobin supports oxygen transport and how red-cell structure affects circulation. It also shows that a molecular change can alter cell shape, flexibility, survival, and function. Studying these links helps explain how blood-cell biology operates across levels, from the HBB gene to whole-body effects.
Treatments are directed toward reducing pain, improving blood flow, and preventing organ damage. These goals address the major consequences of rigid cells, vessel blockage, and premature red-cell destruction rather than focusing only on the underlying mutation. Evaluating outcomes in these areas helps determine whether an approach is limiting the disease's effects on circulation and tissues.