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Related Concept Videos

Peroxisomes01:30

Peroxisomes

Peroxisomes and mitochondria are two important oxygen-utilizing organelles in eukaryotic cells. Mitochondria carry out cellular respiration—the process that converts energy from food into ATP. Peroxisomes carry out a variety of functions, primarily breaking down different substances, such as fatty acids.The peroxisome is a single membrane-bound cellular organelle that can perform several different functions, including lipid metabolism and chemical detoxification. The enzymes within peroxisomes...
Peroxisomes01:24

Peroxisomes

Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
Necrosis01:16

Necrosis

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”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become anucleated and die, but their...
Radical Autoxidation01:20

Radical Autoxidation

The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
Peroxisomes01:24

Peroxisomes

Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
Lifecycle of Erythrocytes01:22

Lifecycle of Erythrocytes

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.
The resident phagocytic macrophages deal with these damaged cells by engulfing them and separating their globin and heme groups.

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Related Experiment Video

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Fast and Specific Assessment of the Halogenating Peroxidase Activity in Leukocyte-enriched Blood Samples
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Fast and Specific Assessment of the Halogenating Peroxidase Activity in Leukocyte-enriched Blood Samples

Published on: July 28, 2016

Lipid peroxidation in erythrocytes.

M R Clemens1, H D Waller

  • 1Eberhard-Karls-Universität Tübingen, Medizinische Klinik, Abteilung Innere Medizin II, F.R.G.

Chemistry and Physics of Lipids
|November 1, 1987
PubMed
Summary

Erythrocytes are highly susceptible to lipid peroxidation due to their membrane composition and high oxygen exposure. Despite this, protective mechanisms like structural compartmentalization and antioxidant enzymes prevent excessive oxidation. Hemoglobin and hemoglobinopathies influence these processes. The study reviews how these factors contribute to erythrocyte stability and protection against oxidative damage.

Keywords:
Erythrocyte lipid peroxidationRed blood cell oxidationAntioxidant enzymes in blood cellsHemoglobin and oxidative stress

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Area of Science:

  • Cellular biochemistry
  • Hematology
  • Oxidative stress research

Background:

Erythrocytes are expected to be highly susceptible to lipid peroxidation. Their membranes contain high levels of polyunsaturated fatty acids, which are prone to oxidation. These cells are constantly exposed to high oxygen concentrations. This environment increases the risk of oxidative damage. Erythrocytes also contain transition metals that can catalyze oxidation reactions. Despite this, in vivo autoxidation is controlled by protective mechanisms. These include enzymes like superoxide dismutase and glutathione peroxidase. Vitamin E also contributes to antioxidant defense. However, structural compartmentalization plays a major role in preventing peroxidation.

Purpose Of The Study:

The purpose of this review is to examine the mechanisms that lead to lipid autoxidation in erythrocytes. It focuses on the role of hemoglobin in these processes. The study also considers how hemoglobinopathies affect lipid peroxidation. It explores the influence of lipid composition on oxidative damage. The review investigates how exogenous oxidant stress impacts erythrocytes. It evaluates the role of antioxidant mechanisms in protecting red blood cells. The goal is to understand how these factors contribute to red cell stability. This knowledge can help explain erythrocyte susceptibility to oxidative stress.

Main Methods:

The study uses a review approach to synthesize existing literature on erythrocyte lipid peroxidation. It examines the biochemical composition of erythrocyte membranes. The role of hemoglobin in oxidation processes is analyzed. The influence of hemoglobinopathies is considered. The study reviews how lipid composition affects peroxidation. It evaluates the impact of exogenous oxidant stress. The review also assesses antioxidant mechanisms. These findings are synthesized to understand erythrocyte protection against oxidation.

Main Results:

Erythrocytes contain polyunsaturated fatty acids that are susceptible to oxidation. They are constantly exposed to high oxygen levels, increasing oxidative risk. Transition metals in erythrocytes can catalyze peroxidation reactions. Despite this, in vivo autoxidation is controlled by protective mechanisms. Antioxidant enzymes like superoxide dismutase and glutathione peroxidase are involved. Vitamin E also contributes to antioxidant defense. Structural compartmentalization is the main protective mechanism. Hemoglobinopathies and lipid composition influence peroxidation processes.

Conclusions:

The review highlights the susceptibility of erythrocytes to lipid peroxidation. It emphasizes the role of polyunsaturated fatty acids in this process. Hemoglobin contributes to oxidation in erythrocytes. Hemoglobinopathies can affect peroxidation mechanisms. Exogenous oxidant stress influences erythrocyte stability. Structural compartmentalization is a key protective mechanism. Antioxidant enzymes and vitamin E provide additional defense. These findings suggest the importance of structural and enzymatic defenses in erythrocyte protection.

Structural compartmentalization is the primary mechanism preventing lipid peroxidation in erythrocytes.

Hemoglobin can catalyze oxidation reactions, contributing to lipid peroxidation in erythrocytes.

Erythrocytes are susceptible due to their high oxygen exposure and polyunsaturated fatty acid content.

Antioxidant enzymes like superoxide dismutase and glutathione peroxidase help protect erythrocytes from oxidation.

Exogenous oxidant stress can disrupt antioxidant mechanisms and increase lipid peroxidation in erythrocytes.

Hemoglobinopathies can alter lipid peroxidation processes in erythrocytes, affecting cell stability.