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Related Concept Videos

Antigen Presenting Cells01:22

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The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
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Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
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Many human characteristics, like height, are shaped by both nature—in other words, by our genes—and by nurture, or our environment. For example, chronic stress during childhood inhibits the production of growth hormones and consequently reduces bone growth and height. Scientists estimate that 70-90% of variation in height is due to genetic differences among individuals, and 10-30% of variation in height is due to differences in the environments that individuals experience,...
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Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
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The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
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Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
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Related Experiment Video

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Analyzing Antigen Recognition by Natural Killer T Cells.

Sebastian Zeissig1,2, Richard S Blumberg3

  • 1Center for Regenerative Therapies Dresden (CRTD), Technische Universität (TU) Dresden, Dresden, Germany. sebastian.zeissig@uniklinikum-dresden.de.

Methods in Molecular Biology (Clifton, N.J.)
|June 1, 2019
PubMed
Summary

Natural killer T (NKT) cells are crucial immune cells that recognize lipid antigens. This study explores methods for investigating how NKT cells detect these antigens, aiding in understanding immunity and autoimmune diseases.

Keywords:
CD1dLipid antigen presentationNatural killer T cellsTetramerα-Galactosylceramide

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Area of Science:

  • Immunology
  • Cellular Biology

Background:

  • Natural killer T (NKT) cells are a specialized T lymphocyte subset.
  • NKT cells recognize lipid antigens via the CD1d molecule.
  • They play key roles in immunity against microbes and cancer, and in autoimmune disorders.

Purpose of the Study:

  • To discuss strategies for studying NKT cell antigen recognition.
  • Focus on methods for analyzing NKT cell responses to lipid antigens.

Main Methods:

  • CD1d tetramer-based approaches.
  • In vitro assays for NKT cell activation.
  • Characterization of NKT cell responses to lipid antigen presentation.

Main Results:

  • NKT cell activation is rapid upon antigen recognition.
  • Activated NKT cells secrete various T helper cytokines (Th1, Th2, Th17).
  • NKT cells modulate dendritic, NK, T, and B cell responses.

Conclusions:

  • Understanding NKT cell antigen recognition is vital for developing new therapies.
  • Research focuses on identifying microbial and self-antigens that activate NKT cells.
  • This work provides insights into NKT cell-mediated immune responses.