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Related Concept Videos

GPCRs Regulate Adenylyl Cylase Activity01:09

GPCRs Regulate Adenylyl Cylase Activity

Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of cells.
Two...
Drugs for Peptic Ulcer Disease: Prostaglandin Analogs as Mucosal Protective Agents01:20

Drugs for Peptic Ulcer Disease: Prostaglandin Analogs as Mucosal Protective Agents

The gastric mucosa produces prostaglandins E2 (PGE2) and prostacyclin (PGI2), crucial in maintaining gastric health. They exert cytoprotective effects, including increasing bicarbonate secretion, releasing protective mucin, reducing gastric acid output, and preventing harmful vasoconstriction. These effects are mediated through various receptors, such as EP1, EP2, EP3, and EP4.
Non-steroidal anti-inflammatory drugs (NSAIDs) can induce peptic ulcers by inhibiting cyclooxygenase, decreasing...
GPCR Desensitization01:12

GPCR Desensitization

G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...
G Protein-coupled Receptors01:15

G Protein-coupled Receptors

G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
Drugs for Peptic Ulcer Disease: Sucralfate as Mucosal Protective Agents01:24

Drugs for Peptic Ulcer Disease: Sucralfate as Mucosal Protective Agents

In the intricate landscape of the gastric lumen, excessive acid secretion disrupts the natural defense mechanisms, weakening the mucus-bicarbonate barrier. This vulnerability allows pepsin to infiltrate epithelial cells, digesting mucosal proteins and triggering erosion, leading to ulcer formation.
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Hormonal Regulation01:40

Hormonal Regulation

Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.

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Related Experiment Videos

Gastrointestinal Cytoprotection by PPARγ Ligands.

Yuji Naito1, Tomohisa Takagi, Toshikazu Yoshikawa

  • 1Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.

PPAR Research
|October 2, 2010
PubMed
Summary

Peroxisome proliferator-activated receptor γ (PPARγ) plays a key role in managing gastrointestinal inflammation. This review explores how PPARγ ligands can be used therapeutically for inflammatory conditions in the gut.

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Area of Science:

  • Molecular biology
  • Immunology
  • Gastroenterology

Background:

  • Peroxisome proliferator-activated receptor γ (PPARγ) is a nuclear receptor involved in lipid metabolism, insulin sensitivity, inflammation, and cell proliferation.
  • PPARγ plays a crucial role in regulating immune responses and controlling inflammation.
  • Studies in animal models highlight PPARγ's significance in gastrointestinal inflammation.

Purpose of the Study:

  • To review the current understanding of PPARγ ligands' function in the gastrointestinal tract.
  • To discuss the therapeutic potential of PPARγ in managing gastrointestinal inflammatory diseases.

Main Methods:

  • Literature review of existing studies on PPARγ and gastrointestinal inflammation.
  • Analysis of research on PPARγ's role in immune response modulation within the gut.

Main Results:

  • PPARγ is implicated in the regulation of immune responses in the context of gastrointestinal inflammation.
  • PPARγ ligands demonstrate potential as therapeutic agents for gastrointestinal inflammatory conditions.

Conclusions:

  • PPARγ is a significant factor in controlling gastrointestinal inflammation.
  • Targeting PPARγ with specific ligands offers a promising therapeutic strategy for gut inflammatory diseases.