The Role of iNOS in Retinal Inflammation
Author Information
Author(s): D Iwama, S Miyahara, H Tamura, K Miyamoto, F Hirose, N Yoshimura
Primary Institution: Kyoto University Graduate School of Medicine
Hypothesis
The study investigates the effect of inducible nitric oxide synthases (iNOS) on inflammatory reactions during endotoxin-induced uveitis (EIU) in mice.
Conclusion
A lack of iNOS suppresses leukocyte–endothelial cell interactions in the retinas of mice with EIU.
Supporting Evidence
- Leukocyte rolling and migration peaked at 48 hours after lipopolysaccharide injection.
- The maximal numbers of rolling leukocytes in the iNOS−/− mouse retina decreased by 98.2% compared to normal mice.
- The maximal numbers of migrated leukocytes in the iNOS−/− mouse retina decreased by 74.0% compared to normal mice.
- The diameters of major retinal veins in the iNOS−/− group were smaller than those in the normal group.
Takeaway
This study found that when a specific enzyme (iNOS) is missing in mice, their immune cells have a harder time moving to areas of inflammation in the eye.
Methodology
The study used immunosuppressed iNOS−/− mice and normal C57BL/6 mice to evaluate leukocyte rolling and migration in the retina after lipopolysaccharide injection.
Participant Demographics
Male pigmented C57BL/6J Jms Slc mice and male immunosuppressed iNOS−/− mice, both aged 8–10 weeks.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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