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Hypoxia01:23

Hypoxia

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Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
Types of Hypoxia
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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
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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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Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...
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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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Induction and Testing of Hypoxia in Cell Culture
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Hypoxia and B cells.

Natalie Burrows1, Patrick Henry Maxwell1

  • 1School of Clinical Medicine, Cambridge Institute for Medical Research, University of Cambridge, Cambridge Biomedical Campus, Hills Road, Cambridge CB2 0XY, United Kingdom.

Experimental Cell Research
|March 17, 2017
PubMed
Summary

Hypoxia-inducible factor (HIF) regulates B cell behavior, antibody quality, and immune tolerance. Understanding HIF activation offers new therapeutic strategies for vaccines and autoimmune diseases.

Keywords:
Adaptive immunityB cellsHypoxiaMetabolismTolerance

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Area of Science:

  • Immunology
  • Cellular Biology
  • Metabolism

Background:

  • Immune cells operate in dynamic environments with fluctuating oxygen levels.
  • Hypoxia-inducible factor (HIF) is crucial for immune cell adaptation and function.
  • HIF plays a known role in innate and T cell responses.

Purpose of the Study:

  • To review recent findings on how hypoxia and HIF influence B cell behavior.
  • To explore the role of HIF in regulating antibody quality and immune tolerance.
  • To highlight the significance of HIF in coordinating B cell metabolism and function.

Main Methods:

  • Literature review of recent discoveries on hypoxia and HIF in B cells.
  • Analysis of HIF's role in B cell quiescence, proliferation, and differentiation.
  • Examination of HIF's impact on antibody production and immune tolerance.

Main Results:

  • Hypoxia and HIF activation are key regulators of B cell behavior and function.
  • HIF influences antibody quality and decisions regarding immune tolerance.
  • HIF coordinates B cell metabolism with varying cellular demands.

Conclusions:

  • HIF activation is critical for B cell adaptation to fluctuating oxygen levels.
  • Targeting HIF presents therapeutic opportunities for vaccine adjuvants and autoimmunity treatments.
  • Further understanding of HIF activation in B cells is essential for developing novel immunotherapies.