Acute Crit Care.  2019 May;34(2):101-107. 10.4266/acc.2019.00542.

Two-photon intravital imaging of leukocyte migration during inflammation in the respiratory system

• Kim YM
• Jeong S
• Choe YH
• Hyun YM

• KMID: 2449363
• DOI: http://doi.org/10.4266/acc.2019.00542

Abstract

Two-photon intravital imaging is a powerful method by which researchers are able to directly observe biological phenomena in live organisms. Researchers in various biomedical research fields have applied two-photon imaging to a variety of target organs by utilizing this technology's ability to penetrate to significant depths with minimal phototoxicity. The mouse respiratory system in inflammation models is a good example, as two-photon intravital imaging can provide insights as to how the immune system is activated in response to inflammation within the respiratory system. Inflammation models can be generated via influenza viral, bacterial, or lipopolysaccharide injection. To exteriorize the lungs or trachea, thoracotomy or tracheotomy is performed, respectively; the appropriate combination of inflammation induction and organ exposure is selected depending on the study purpose. On the other hand, visualizing the movement of leukocytes is also an important component; to this end, immune cell populations of interest are either labeled via the genetic attachment of fluorescent proteins or stained with antibodies or dyes. With the proper selection of methods at each step, two-photon intravital imaging can yield visual evidence regarding immune responses to inflammation.

Keyword

inflammation; intravital imaging; respiratory system; two-photon microscopy

MeSH Terms

Animals
Antibodies
Biological Phenomena
Coloring Agents
Dermatitis, Phototoxic
Hand
Immune System
Inflammation*
Influenza, Human
Leukocytes*
Lung
Methods
Mice
Respiratory System*
Thoracotomy
Trachea
Tracheotomy
Antibodies
Coloring Agents