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Sepsis-Induced Brain Dysfunction: Pathogenesis, Diagnosis, and Treatment.

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Sepsis can cause severe brain dysfunction, including sepsis-associated encephalopathy and cognitive impairment. Understanding the mechanisms of sepsis-induced brain injury is crucial for developing effective treatments.

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Area of Science:

  • Neuroscience
  • Infectious Diseases
  • Critical Care Medicine

Background:

  • Sepsis, a dysregulated host response to infection, leads to organ dysfunction and can cause acute and long-term brain dysfunction.
  • Sepsis-associated encephalopathy (SAE) and cognitive impairment are prevalent complications affecting patient quality of life and increasing healthcare burden.

Purpose of the Study:

  • To review the underlying mechanisms of sepsis-induced brain injury.
  • To highlight the influence of systemic inflammation on the blood-brain barrier (BBB), neuroinflammation, and brain microcirculation.
  • To provide new mechanism-based directions for future research.

Main Methods:

  • Literature review focusing on the pathogenesis of sepsis-induced brain dysfunction.
  • Analysis of the interaction between systemic inflammation and brain function.
  • Examination of factors including BBB dysfunction, neuroinflammation, and microcirculation dysfunction.

Main Results:

  • Sepsis-induced brain dysfunction involves complex interactions including systemic inflammation, BBB disruption, neuroinflammation, and microcirculatory changes.
  • Current diagnostic methods rely on clinical manifestations and neuropathological examination.
  • Clinical treatment of sepsis-induced brain dysfunction remains challenging despite animal studies.

Conclusions:

  • Understanding the mechanisms of sepsis-induced brain injury is essential for developing targeted therapies.
  • Further research into the interplay of systemic inflammation and brain pathophysiology is needed.
  • Developing novel strategies to prevent or ameliorate sepsis-induced brain dysfunction is a critical unmet need.