Experimental models of gram-negative sepsis

Area of Science:

• Medical research
• Infectious disease modeling
• Animal studies

Background:

• Sepsis mortality rates have stagnated due to inadequate preclinical research models.
• Flawed experimental designs impede progress in understanding and treating sepsis.

Purpose of the Study:

• To review existing animal models for sepsis research.
• To identify limitations and propose improvements for preclinical sepsis studies.

Main Methods:

• A comprehensive literature review of sepsis animal models was conducted.
• Medline database searches utilized specific keywords related to sepsis and inflammation.
• Additional relevant studies were identified through reference lists.

Main Results:

• Numerous sepsis animal models exist, but none are universally superior.
• Results from endotoxin or bacterial infusion models require cautious interpretation.
• Peritonitis models are considered the gold standard, provided virulent bacterial species are used.

Conclusions:

• A standardized panel of sepsis animal models, including immunocompromised models, is needed.
• A uniform definition of sepsis applicable to various animal species is essential.
• Improved models will enhance the preclinical assessment of immunomodulatory agents for sepsis.