Sustenance of endothelial cell stability in septic mice through appropriate activation of transient receptor
1College of Life Sciences, Zhejiang University, Hangzhou, China.
Abstract:
Therapeutic target transient receptor potential vanilloid-4 (TRPV-4) is frequently applied in endotoxemia research. It has been reported that HC067047, an inhibitor of TRPV-4, mitigated LPS-induced injury. However, the inhibition of TRPV-4 with HC06047 did not attenuate LPS-induced symptoms and exaggerated pathology. This study was carried with a view to unravelling the reason(s) behind these conflicting results. Different doses of the inhibitor were used in the same degree of sepsis, and their effects were determined through assays for sepsis-related physiological indicators such as endothelial injury markers, coagulation index, organ damage indicators, inflammatory factor levels, and cell apoptosis. The results showed that high or low inhibitor levels had no significant effect on sepsis-related physiological indicators. These findings suggest that proper activation of TRPV-4 in sepsis is important for maintaining normal physiological function. Thus, the degree of TRPV-4 activation should match the severity of sepsis.
Insights
Transient Receptor Potential Vanilloid-4 (TRPV-4) activation, not inhibition, is crucial in sepsis. Proper TRPV-4 activation levels are vital for maintaining normal physiological function during sepsis.
Area of Science:
- Physiology
- Pharmacology
- Immunology
Background:
- Transient Receptor Potential Vanilloid-4 (TRPV-4) is a therapeutic target in endotoxemia research.
- Previous studies reported HC067047, a TRPV-4 inhibitor, mitigated LPS-induced injury.
- Conflicting results exist regarding TRPV-4 inhibition's effect on LPS-induced symptoms and pathology.
Purpose of the Study:
- To investigate the conflicting results regarding TRPV-4 inhibition in LPS-induced sepsis.
- To determine the effects of different doses of TRPV-4 inhibitor on sepsis-related physiological indicators.
- To elucidate the role of TRPV-4 activation in sepsis.
Main Methods:
- Administered varying doses of a TRPV-4 inhibitor in a sepsis model.
- Assessed sepsis-related physiological indicators, including endothelial injury markers, coagulation index, organ damage, inflammatory factors, and cell apoptosis.
- Compared outcomes between different inhibitor concentrations and sepsis severity.
Main Results:
- Neither high nor low levels of the TRPV-4 inhibitor significantly affected sepsis-related physiological indicators.
- TRPV-4 inhibition did not attenuate LPS-induced symptoms or improve pathology.
- Exaggerated pathology was observed with TRPV-4 inhibition.
Conclusions:
- Proper activation of TRPV-4 is important for maintaining normal physiological function during sepsis.
- The degree of TRPV-4 activation should be matched to the severity of sepsis.
- TRPV-4 inhibition may not be a suitable therapeutic strategy for LPS-induced sepsis.
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