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Disorders of Erythrocytes01:27

Disorders of Erythrocytes

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Disorders of erythrocytes, or red blood cells (RBCs), include a range of conditions affecting their number, shape, or function.
Erythrocyte disorders can be broadly categorized into two main types: anemic and polycythemic conditions.
A low oxygen-carrying capacity of the blood due to the loss, lower production, or destruction of erythrocytes is termed anemia. Hemorrhagic anemia, for example, occurs when bleeding from an external wound or internal ulcer reduces erythrocyte counts.
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Lifecycle of Erythrocytes01:22

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Erythrocytes, also known as red blood cells, constantly move through blood capillaries. As a result, they damage their plasma membrane due to the continuous friction. Typically, after 100 to 120 days, erythrocytes become rigid and fragile as they wear out. As they pass through small vessels in the spleen and liver, they can get trapped and break apart into fragments.
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Necrosis01:16

Necrosis

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Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
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Factors Affecting Erythropoiesis01:24

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The cardiovascular system regulates the number of erythrocytes in the bloodstream to ensure optimal oxygen transport. It also prevents over-proliferation of these cells, which helps to maintain blood viscosity and flow rate.
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Red blood cells  (RBCs) transport oxygen to all body tissues. These cells survive only for 120 days and then need to be replenished. Erythropoiesis is the process of RBC production. In healthy individuals, erythropoiesis ensures all tissues are amply supplied with oxygen. In addition, blood loss due to injury leads to a drop in the physiological oxygen level that will cause erythropoiesis. Any defect in erythropoiesis leads to several physiological disorders, including thalassemia, anemia,...
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Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow01:26

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Chronic liver disease significantly impacts drug metabolism due to alterations in hepatic blood flow and enzyme accessibility. This disruption affects the body's pharmacokinetics—the movement and processing of drugs within the system. Key enzymes crucial for metabolizing medications become less accessible, changing how drugs are processed and utilized. Furthermore, liver disease influences the synthesis of plasma proteins, such as albumin and globulins, which play critical roles in drug...
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Lipotoxicity Disrupts Erythrocyte Function: A Perspective.

Charalampos Papadopoulos1, Ioannis Tentes1, Konstantinos Anagnostopoulos1

  • 1Laboratory of Biochemistry, School of Medicine, Democritus University of Thrace, Alexandroupolis, Greece.

Cardiovascular & Hematological Disorders Drug Targets
|November 26, 2021
PubMed
Summary

Toxic lipid accumulation, or lipotoxicity, affects erythrocytes, altering their lipidome and causing malfunction. Understanding these changes in red blood cells may reveal new therapeutic targets for metabolic and blood disorders.

Keywords:
Erythrocytesatherosclerosis.cardiometabolic diseaseslipid accumulationlipotoxicityoxidized phospholipids

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Pathophysiology

Background:

  • Lipotoxicity, characterized by harmful lipid accumulation, leads to cellular dysfunction, death, and inflammation in various organs.
  • Erythrocytes play a crucial role in lipid transport within the bloodstream, with their lipid composition influenced by interactions with other blood components.

Purpose of the Study:

  • To consolidate current scientific understanding of how toxic lipid accumulation impacts erythrocytes.

Main Methods:

  • Literature review and synthesis of existing research on erythrocyte lipotoxicity.
  • Analysis of studies investigating alterations in erythrocyte lipidome in disease states.

Main Results:

  • Erythrocyte lipidome modifications are observed in lipotoxic conditions like fatty liver disease, heart failure, and diabetes.
  • Specific lipids such as ceramide, lysophosphatidylcholine, lysophosphatidic acid, palmitic acid, and free cholesterol have been identified as inducers of erythrocyte malfunction.

Conclusions:

  • Erythrocytes are identified as a cellular target susceptible to lipotoxicity.
  • Further investigation into the molecular mechanisms underlying erythrocyte lipotoxicity may uncover novel therapeutic strategies for cardiometabolic and hematological diseases.