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Related Concept Videos

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
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...
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Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

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Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
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Acute Respiratory Failure-II01:21

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Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
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Gastritis-II: Pathophysiology01:17

Gastritis-II: Pathophysiology

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Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
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Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors01:24

Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors

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Peptic ulcer disease, commonly called PUD, represents a multifaceted condition characterized by disruptions in the lining of the gastrointestinal (GI)  tract. Central to the protection of the gastrointestinal lining is the mucosal-bicarbonate barrier. This physiological defense mechanism is a formidable shield against the corrosive effects of gastric acid and pepsin secretion in the stomach. Its role is pivotal in maintaining the structural integrity of the stomach's inner lining.
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Peptic Ulcer Disease II: Pathophysiology01:28

Peptic Ulcer Disease II: Pathophysiology

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Peptic Ulcer Disease (PUD) is characterized by the development of ulcers in the stomach or duodenal mucosa. Its pathophysiology is complex, involving a balance between damaging and protective elements.
Damaging agents such as Helicobacter pylori, gastric acid, pepsin, and nonsteroidal anti-inflammatory drugs (NSAIDs) can weaken the mucosal defense, allowing hydrogen ions to infiltrate back and harm epithelial cells.
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Mucin Agarose Gel Electrophoresis: Western Blotting for High-molecular-weight Glycoproteins
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Hypoxia and Mucosal Inflammation.

Sean P Colgan1,2, Eric L Campbell1,2, Douglas J Kominsky2,3

  • 1Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado 80045;

Annual Review of Pathology
|May 20, 2016
PubMed
Summary
This summary is machine-generated.

Inflammation triggers "inflammatory hypoxia" due to increased oxygen consumption. Hypoxia-inducible factor (HIF) regulates genes crucial for resolving inflammation, offering new therapeutic targets.

Keywords:
colitiscreatineepitheliuminflammationmetabolismmucosamurine modelneutrophilnucleosidenucleotidasenucleotidephosphocreatine

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Area of Science:

  • Immunology
  • Cellular Metabolism
  • Molecular Biology

Background:

  • Inflammation is characterized by altered metabolic activity.
  • Oxygen (O2) metabolism and hypoxia are increasingly recognized in inflammatory processes, termed "inflammatory hypoxia."
  • This hypoxia arises from inflammatory cells, cell proliferation, and O2-consuming enzymes.

Purpose of the Study:

  • To review recent research on tissue hypoxia and metabolic control in inflammation and immunity.
  • To highlight the role of hypoxia-inducible factor (HIF) in regulating inflammatory resolution pathways.
  • To identify potential therapeutic targets based on these mechanisms.

Main Methods:

  • Literature review of studies investigating tissue hypoxia in inflammation.
  • Analysis of the role of HIF in regulating inflammatory gene expression.
  • Examination of metabolic shifts during inflammatory responses.

Main Results:

  • Inflammatory hypoxia results from increased O2 demand by inflammatory cells and activated enzymes.
  • Hypoxia-inducible factor (HIF) plays a key role in controlling genes that resolve inflammation.
  • Understanding these pathways offers insights into basic inflammation mechanisms.

Conclusions:

  • Tissue hypoxia is a significant feature of inflammation.
  • HIF-mediated pathways are critical for inflammatory resolution.
  • Targeting hypoxia and metabolic pathways presents new therapeutic opportunities for inflammatory diseases.