Related Experiment Videos
Neutrophil migration mechanisms, with an emphasis on the pulmonary vasculature
1Department of Pharmacology and Toxicology, Michigan State University, East Lansing, Michigan 48824, USA. rothr@msu.edu
Abstract:
Leukocyte trafficking into pulmonary tissue and airspaces is a critical component of the host defense response. Activation and migration of polymorphonuclear leukocytes (PMNs) into lungs also contribute to inflammatory tissue injury and remodeling of tissue architecture. There have been considerable advances in our understanding of the mechanisms that control PMN adhesion and transendothelial migration (TEM). Mechanisms of migration unique to the lungs have been described with regard to the profile of adhesion molecules, cytokines, and chemokines elicited during PMN emigration from blood vessels. This work reviews general mechanisms of TEM of PMNs and discusses the nature of PMN recruitment in several models of airway inflammation that illustrate how various stimuli elicit different responses. Pharmacologic manipulation of adhesive interactions between PMNs and endothelial cells is a current area of research aimed at developing pharmacologic agents to control inflammation during pulmonary and other inflammatory diseases. A summary of some of these agents and their actions is presented.
Insights
Polymorphonuclear leukocytes (PMNs) migration into lungs is key for host defense but can cause inflammation. Understanding PMN adhesion and transendothelial migration (TEM) mechanisms aids in developing treatments for pulmonary diseases.
Area of Science:
- Pulmonary immunology and inflammation research.
- Cellular and molecular mechanisms of leukocyte trafficking.
Background:
- Leukocyte trafficking into the lungs is crucial for host defense.
- Polymorphonuclear leukocyte (PMN) migration contributes to inflammatory lung injury and tissue remodeling.
- Advances in understanding PMN adhesion and transendothelial migration (TEM) are significant.
Purpose of the Study:
- To review general mechanisms of PMN TEM.
- To discuss PMN recruitment in airway inflammation models.
- To summarize pharmacologic agents targeting PMN-endothelial interactions for pulmonary disease treatment.
Main Methods:
- Review of existing literature on PMN TEM mechanisms.
- Discussion of PMN recruitment in various airway inflammation models.
- Summary of pharmacologic agents and their mechanisms of action.
Main Results:
- Specific lung mechanisms of PMN migration involve unique adhesion molecules, cytokines, and chemokines.
- Different stimuli elicit distinct PMN recruitment responses in airway inflammation models.
- Pharmacologic manipulation of PMN-endothelial interactions is a promising therapeutic strategy.
Conclusions:
- Understanding PMN TEM is critical for managing pulmonary inflammation.
- Targeting PMN adhesion offers a potential therapeutic avenue for inflammatory lung diseases.
- Further research into pharmacologic agents is ongoing for clinical application.