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Corticosteroid-binding globulin: acute and chronic inflammation.

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Corticosteroid-binding globulin (CBG) plays a key role in cortisol transport and tissue delivery, especially during inflammation. Its function is altered in inflammatory diseases, suggesting new therapeutic targets for cortisol delivery.

Keywords:
Cortisolcorticosteroid-binding globulinhigh-affinity CBGinflammationlow-affinity CBG

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Area of Science:

  • Biochemistry
  • Immunology
  • Endocrinology

Background:

  • Corticosteroid-binding globulin (CBG) is the primary cortisol transporter.
  • CBG's role extends beyond transport to include cortisol tissue delivery, particularly at inflammatory sites.
  • CBG undergoes structural changes affecting cortisol binding affinity, influenced by neutrophil elastase (NE).

Purpose of the Study:

  • To explore the role of CBG in acute and chronic inflammation.
  • To investigate the impact of CBG cleavage and single nucleotide polymorphisms (SNPs) on inflammatory disease.
  • To evaluate CBG's potential as a therapeutic target for optimizing cortisol delivery.

Main Methods:

  • Analysis of CBG levels in sepsis and chronic inflammatory conditions.
  • Investigation of CBG structure and function, including reactive central loop (RCL) cleavage.
  • Examination of SERPINA6 gene polymorphisms related to inflammatory disease risk.

Main Results:

  • High-affinity CBG (haCBG) is depleted in acute inflammation (sepsis), correlating with severity and survival.
  • CBG cleavage is paradoxically reduced in chronic inflammation, suggesting impaired cortisol delivery.
  • Function-altering SERPINA6 gene SNPs are frequent and may influence population risk for inflammatory diseases.

Conclusions:

  • CBG's altered function in inflammation impacts cortisol delivery.
  • CBG cleavage patterns differ between acute and chronic inflammatory states.
  • Targeting CBG for optimal cortisol tissue delivery presents a potential therapeutic strategy for inflammatory diseases.