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Related Concept Videos

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...
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...
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Lysosomes

Lysosomes are membrane-enclosed spherical sacs derived from the Golgi apparatus. The most important function of the lysosome is degrading macromolecules and biological polymers that are released during membrane trafficking events such as the secretory, endocytic, autophagic, and phagocytic pathways. The degradation is carried out by several hydrolytic enzymes active in an acidic environment of the lysosomal lumen. These acid hydrolases are involved in cellular processes such as cell signaling,...
Lysosomal Hydrolases01:22

Lysosomal Hydrolases

Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
Exocytosis00:50

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Exocytosis is a process that releases molecules outside the cell. Like other bulk transport mechanisms, exocytosis requires energy.
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Exocytosis00:51

Exocytosis

Exocytosis is used to release material from cells. Like other bulk transport mechanisms, exocytosis requires energy.

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Related Experiment Video

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Detecting, Visualizing and Quantitating the Generation of Reactive Oxygen Species in an Amoeba Model System
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Lectin-triggered superoxide/h(2)o (2) and granule enzyme release from cells.

A V Timoshenko1, K Kayser, H J Gabius

  • 1Institue für Physiologische Chemie, Tierärztliche Fakultät, Ludwig-Maximilians-Universität, München, Germany.

Methods in Molecular Medicine
|March 5, 2011
PubMed
Summary

Lectins can modulate immune responses by affecting reactive oxygen compounds and granule enzymes. This research outlines methods to test lectin effects for potential clinical applications in treating infections and cancer.

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Area of Science:

  • Cell biology
  • Immunology
  • Biochemistry

Background:

  • Lectins, proteins that bind carbohydrates, influence cellular activities with potential clinical applications.
  • Plant and human lectins may modulate the host immune system.
  • Reactive oxygen compounds and granule enzymes are key defense mechanisms against pathogens and cancer cells.

Purpose of the Study:

  • To investigate the modulatory effects of lectins on cellular immune functions.
  • To establish protocols for assaying lectin-induced changes in reactive oxygen compound production and granule enzyme release.
  • To explore the potential of lectin-mediated therapies for infectious diseases and malignancies.

Main Methods:

  • Describes protocols for determining lectin effects on cellular activities.
  • Assays for measuring reactive oxygen compounds (superoxide anion radical, H2O2).
  • Assays for quantifying the release of granule enzymes.

Main Results:

  • Lectins demonstrate modulatory potency on cellular activities, impacting immune responses.
  • Potential for lectins to enhance host defense mechanisms against infectious organisms and malignant cells.
  • Established methodologies for rigorous testing of lectins.

Conclusions:

  • Lectins hold promise as therapeutic agents by enhancing innate immune responses.
  • Further research into plant and endogenous lectins can lead to novel lectin-mediated treatment strategies.
  • Standardized assays are crucial for evaluating lectin efficacy in clinical settings.