[Myeloperoxidase of neutrophils and its possible role in lipid peroxidation processes in arteriosclerosis]

Insights

Atherosclerosis patients with a hereditary predisposition showed decreased neutrophil myeloperoxidase (MPO) activity and increased acetyl hydroperoxides. This suggests MPO

Area of Science:

  • Biochemistry
  • Cardiovascular Research
  • Genetics

Context:

  • Investigates biomarkers in families of atherosclerosis patients.
  • Focuses on neutrophil myeloperoxidase (MPO) and acetyl hydroperoxides.
  • Examines hereditary predisposition to atherosclerosis.

Purpose:

  • To study the activity of blood plasma myeloperoxidase (MPO) and acetyl hydroperoxides in families of atherosclerosis patients.
  • To identify potential biomarkers associated with hereditary atherosclerosis.
  • To explore the role of MPO in the pathogenesis of atherosclerosis.

Summary:

  • Neutrophil MPO activity was found to be decreased in individuals with a hereditary predisposition to atherosclerosis.
  • Blood plasma acetyl hydroperoxide levels were elevated in subjects with a hereditary predisposition to atherosclerosis.
  • The study discusses the potential role of MPO as an active oxygen species generator in atherosclerosis.

Impact:

  • Provides insights into the biochemical mechanisms underlying hereditary atherosclerosis.
  • Highlights potential diagnostic or prognostic markers for atherosclerosis.
  • Contributes to understanding the role of oxidative stress in cardiovascular disease.

Related Concept Videos

Inflammation01:38

Inflammation

Overview
Protein Modifications in the RER01:26

Protein Modifications in the RER

Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal sequences.
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...
Protein Import into the Peroxisomes01:27

Protein Import into the Peroxisomes

Cells contain membrane-bound organelles called peroxisomes that oxidize organic molecules by transferring hydrogen atoms to oxygen, producing hydrogen peroxide. Peroxisomes enzymatically convert the released hydrogen peroxide into water and oxygen.
Peroxisomal Protein Import:
Peroxisomes lack the genetic machinery required to code for their own proteins. Hence, most peroxisomal membrane, lumenal and transmembrane proteins are synthesized in the cytoplasm or ER and transported to the peroxisome...
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...
Lipid-derived Compounds in the Human Body01:31

Lipid-derived Compounds in the Human Body

Fats and lipids are crucial components in the human body. Some lipid-derived compounds, such as fat-soluble vitamins, eicosanoids, lipoproteins, and glycolipids, also play unique roles to support various  biological processes .
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin, delayed...