Pathobiology of neutrophil transepithelial migration: implications in mediating epithelial injury

Alex C Chin1, Charles A Parkos

  • 1Epithelial Pathobiology Unit, Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia 30322, USA. achin@emory.edu

Annual Review of Pathology
|November 28, 2007
PubMed

Insights

Neutrophil (polymorphonuclear leukocyte, PMN) migration into tissues is key in inflammatory diseases. Understanding PMN-epithelial interactions offers new therapeutic targets for inflammation.

Area of Science:

  • Immunology
  • Cell Biology
  • Pathology

Background:

  • Neutrophil (polymorphonuclear leukocyte, PMN) transepithelial migration and accumulation are characteristic of inflammatory conditions.
  • This process is directly linked to clinical disease severity and epithelial damage.

Purpose of the Study:

  • To review the consequences of PMN infiltration into epithelial tissues.
  • To highlight molecular mechanisms of PMN epithelial interactions during transmigration.

Main Methods:

  • Literature review of existing research on neutrophil transmigration.
  • Analysis of molecular interactions between neutrophils and epithelial cells.

Main Results:

  • PMN infiltration contributes significantly to epithelial tissue injury during inflammation.
  • Specific molecular pathways govern PMN adhesion, transmigration, and subsequent tissue effects.

Conclusions:

  • A comprehensive understanding of PMN-epithelial interactions is crucial for developing targeted anti-inflammatory therapies.
  • Further research into these mechanisms may lead to organ-specific treatments to mitigate epithelial inflammation.

Related Concept Videos

Cell Migration01:19

Cell Migration

Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
Cell Migration01:09

Cell Migration

Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
Acute Inflammation II: Cellular Phase01:26

Acute Inflammation II: Cellular Phase

The cellular phase of acute inflammation is a tightly orchestrated sequence of events that recruits leukocytes, primarily neutrophils, to sites of tissue injury or infection. Following the initial vascular changes, this phase ensures effective immune cell migration, activation, and function at the affected site to eliminate pathogens and initiate tissue repair.Leukocyte Recruitment CascadeLeukocyte recruitment happens in four steps: margination, adhesion, transmigration, and chemotaxis. Reduced...
Inflammation01:38

Inflammation

Overview
Chemotaxis and Direction of Cell Migration01:21

Chemotaxis and Direction of Cell Migration

Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon towards...
Peptic Ulcer Disease II: Pathophysiology01:24

Peptic Ulcer Disease II: Pathophysiology

Peptic ulcer disease develops when protective mechanisms of the gastrointestinal mucosa are overwhelmed by harmful factors, leading to localized erosions in the stomach or proximal duodenum. The main causes are Helicobacter pylori infection and chronic use of nonsteroidal anti-inflammatory drugs (NSAIDs).Helicobacter pylori–Induced InjuryBacterial Adaptation and Colonization:H. pylori is a spiral, Gram-negative bacterium adapted to the acidic stomach. and transmitted through oral-oral or...