CECAL SLURRY AS AN ALTERNATIVE MODEL TO CECAL LIGATION AND PUNCTURE FOR THE STUDY OF SEPSIS-INDUCED CARDIOVASCULAR...

Area of Science:

• Biomedical Research
• Animal Models of Disease
• Sepsis Pathophysiology

Background:

• Sepsis is a critical condition often studied using animal models.
• The cecal ligation and puncture (CLP) model is standard but invasive and variable.
• The cecal slurry (CS) model is less invasive but lacks standardization and its cardiovascular effects are understudied.

Purpose of the Study:

• To standardize the cecal slurry (CS) model in Wistar rats.
• To evaluate sepsis-induced cardiovascular dysfunction using the standardized CS model.
• To compare the CS model with the established cecal ligation and puncture (CLP) model.

Main Methods:

• Standardization of the cecal slurry (CS) preparation and administration in Wistar rats.
• In vivo and ex vivo assessment of cardiovascular parameters, including blood pressure, heart rate, and vascular reactivity.
• Biochemical analysis to assess organ dysfunction and measurement of nitric oxide metabolites.

Main Results:

• The standardized CS model induced hypotension, tachycardia, and reduced contractile responses to vasoconstrictors.
• Organ dysfunction was indicated by elevated lactate, AST, ALT, creatinine, and urea levels.
• The CS model demonstrated increased nitric oxide metabolite production, bacterial spread, and greater homogeneity compared to CLP.

Conclusions:

• The standardized CS model effectively replicates sepsis-induced cardiovascular dysfunction in rats.
• The CS model is less invasive, causes less animal suffering, and offers better homogeneity than the CLP model.
• The CS model is a viable and potentially superior alternative for sepsis research.