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ORIGINAL ARTICLE
Year : 2016  |  Volume : 64  |  Issue : 12  |  Page : 873-877

Systemic administration of an anti-tumor necrosis factor-alpha monoclonal antibody protects against endotoxin-induced uveitis in rats


1 Department of Ophthalmology, The Eye Hospital Affiliated of Shandong Medical College, Linyi, China
2 Department of Endocrinology, The Third Central Hospital of Tianjin, Tianjin, China
3 Department of Ophthalmology, Tianjin Eye Hospital, Tianjin, China

Correspondence Address:
Qingman Ge
The Eye Hospital Affiliated of Shandong Medical College, Linyi
China
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0301-4738.198864

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Objective: This study was to evaluate the effect of systemic injection of an anti-tumor necrosis factor alpha (TNF-α) monoclonal antibody (mAb) on endotoxin-induced uveitis (EIU). Materials and Methods: Fifty-six male Wistar rats (6–8 weeks old) were randomly divided into three groups: EIU, anti-TNF-α mAb + EIU, and control. EIU was induced by injecting Escherichia coli O55:B5 lipopolysaccharide (LPS) into the hind footpad of the rats (150 μg/rat). The anti-TNF-α mAb (1 μg/kg) was administrated 30 min before LPS injection through one-time intravenous injection. The onset time and peak time of EIU were recorded. The serum and aqueous humor (AH) TNF-α, interleukin (IL)-6, and IL-10 levels were measured by ELISA at 4, 24, and 72 h post-LPS injection. Clinical manifestations of EIU and eye histopathology were scored. Results: Compared with the EIU rats, anti-TNF-α mAb + EIU rats showed significantly delayed onset of uveitis (t = 7.41, P< 0.001), lower clinical scores and histopathological grades (t = 3.18/2.22, P< 0.001), reduced levels of TNF-α (F = 15.06/59.43, P< 0.001) and IL-6 (F = 99.63/14.92, P< 0.001), and increased levels of IL-10 (F = 24.94/8.99, P< 0.001) in the serum and AH. AH TNF-α, serum IL-6, and AH IL-6 levels are positively correlated, whereas serum IL-10 levels were negatively correlated with EIU activity. Conclusion: Antagonizing TNF-α by system injection of the anti-TNF-α mAb protects against EIU in rats. Blocking TNF-α signaling could be a useful strategy for managing uveitis.


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