Role of Endothelial Cells in Inflammatory Processes

Area of Science:

• Vascular Biology
• Biochemistry
• Cell Biology

Background:

• The kinin-kallikrein system plays a crucial role in physiological processes.
• Its presence and function within the vascular endothelium are not fully elucidated.

Purpose of the Study:

• To investigate the presence and activity of the kinin-kallikrein system components in endothelial cells.
• To determine the potential role of this system in vascular wall functions.

Main Methods:

• Studied human umbilical vein (HUVEC) and bovine aortic endothelial cells (BAEC).
• Measured kinin generation using radioimmunoassay and glandular kallikrein activity via colorimetric methods.
• Utilized immunocytochemical staining for kallikrein localization.

Main Results:

• Confirmed the presence of all key elements of the kinin-kallikrein system in HUVEC and BAEC.
• Quantified glandular kallikrein activity in both cell types.
• Demonstrated that dextran sulfate significantly reduced kinin generation.

Conclusions:

• The vascular endothelium possesses a local kinin-kallikrein system.
• This system may be involved in regulating local inflammatory responses.
• It may also contribute to the modulation of vascular tone.