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Updated: Aug 15, 2026
Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention
Published on: October 16, 2013
Sedation with propofol and isoflurane differs in terms of microcirculatory parameters: A randomized animal study
Christine Kang1, Ah-Reum Cho2, Haekyu Kim2
1Department of Anesthesia and Pain Medicine, School of Medicine, Pusan National University, Yangsan, Republic of Korea; Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul, Republic of Korea.
Objective:
This study aimed to explore the effects of sedative doses of propofol and isoflurane on microcirculation in septic mice compared to controls. Isoflurane, known for its potential as a sedation drug in bedside applications, lacks clarity regarding its impact on the microcirculation system. The hypothesis was that propofol would exert a more pronounced influence on the microvascular flow index, particularly amplified in septic conditions.
Material And Methods:
Randomized study was conducted from December 2020 to October 2021 involved 60 BALB/c mice, with 52 mice analyzed. Dorsal skinfold chambers were implanted, followed by intraperitoneal injections of either sterile 0.9 % saline or lipopolysaccharide for the control and sepsis groups, respectively. Both groups received propofol or isoflurane treatment for 120 min. Microcirculatory parameters were obtained via incident dark-field microscopy videos, along with the mean blood pressure and heart rate at three time points: before sedation (T0), 30 min after sedation (T30), and 120 min after sedation (T120). Endothelial glycocalyx thickness and syndecan-1 concentration were also analyzed.
Results:
In healthy controls, both anesthetics reduced blood pressure. However, propofol maintained microvascular flow, differing significantly from isoflurane at T120 (propofol, 2.8 ± 0.3 vs. isoflurane, 1.6 ± 0.9; P < 0.001). In the sepsis group, a similar pattern occurred at T120 without statistical significance (propofol, 1.8 ± 1.1 vs. isoflurane, 1.2 ± 0.7; P = 0.023). Syndecan-1 levels did not differ between agents, but glycocalyx thickness index was significantly lower in the isoflurane-sepsis group than propofol (P = 0.001).
Conclusions:
Propofol potentially offers protective action against microvascular flow deterioration compared to isoflurane, observed in control mice. Furthermore, a lower degree of sepsis-induced glycocalyx degradation was evident with propofol compared to isoflurane.
Insights
Propofol better preserves microvascular flow and reduces glycocalyx degradation in septic mice compared to isoflurane. This suggests propofol may offer a protective effect in sepsis-induced microcirculatory dysfunction.
Area of Science:
- Anesthesiology
- Critical Care Medicine
- Microcirculation Research
Background:
- Sedative agents like propofol and isoflurane have potential bedside applications.
- The impact of isoflurane on microcirculation, especially in sepsis, requires further elucidation.
- Understanding anesthetic effects on microvascular function is crucial for managing critically ill patients.
Purpose of the Study:
- To compare the effects of propofol and isoflurane on microcirculation in septic mice.
- To investigate the influence of these anesthetics on microvascular flow index, blood pressure, and heart rate.
- To assess the impact on endothelial glycocalyx integrity and syndecan-1 levels.
Main Methods:
- A randomized study involving 60 BALB/c mice, with 52 analyzed, divided into control and sepsis groups.
- Sepsis was induced via lipopolysaccharide injection; both groups received propofol or isoflurane for 120 minutes.
- Microcirculatory parameters were assessed using incident dark-field microscopy, alongside hemodynamic monitoring and analysis of endothelial glycocalyx and syndecan-1.
Main Results:
- Both anesthetics reduced blood pressure in controls; propofol maintained microvascular flow significantly better than isoflurane (P < 0.001).
- In sepsis, propofol also showed a trend towards better microvascular flow preservation compared to isoflurane (P = 0.023).
- Sepsis-induced glycocalyx degradation was less pronounced with propofol than isoflurane (P = 0.001).
Conclusions:
- Propofol may provide a protective effect against microvascular flow deterioration compared to isoflurane in healthy mice.
- Propofol demonstrated a reduced degree of sepsis-induced glycocalyx degradation relative to isoflurane.
- These findings suggest differential impacts of propofol and isoflurane on microcirculatory integrity during sepsis.
