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Retina and Choroid

The Role of Plasma Calprotectin in Non-infectious Uveitis

ORCID Icon, , ORCID Icon, , , , & show all
Pages 1184-1192 | Received 09 Feb 2020, Accepted 13 Dec 2020, Published online: 11 Jan 2021
 

ABSTRACT

Purpose

To investigate the role of plasma calprotectin in non-infectious uveitis.

Methods

This is an observational both cross-sectional and prospective study. Patients with active non-infectious uveitis were recruited as well as nonuveitic controls. Plasma calprotectin was determined and an ophthalmological examination was performed for both patients and controls. Independent variables possibly influencing levels of plasma calprotectin were recorded and analyzed. Categorical variables were compared by chi-square test (applying correction by continuity if necessary). T-test (or Kruskal-Wallis when appropriate) was used to compare averages. Multiple linear regression analysis was used to assess relationship between plasma calprotectin levels and independent variables. Spearman coefficient was calculated in order to establish correlation between plasma calprotectin and anterior chamber cell grading. Changes in plasma calprotectin levels between the flare beginning and its resolution were determined with mixed model for repeated measures. R software (version 3.6.0) was used to perform the statistical analysis.

Results

We included 74 patients and 40 controls in the cross-sectional study. Plasma calprotectin levels were higher in uveitis patients compared to those of controls (p = .003), being higher in younger patients and patients with posterior uveitis. No correlation between calprotectin and anterior chamber inflammation degree was found (p = .198). For the prospective study, we included 36 patients. We found no significant differences in calprotectin levels between active and inactive uveitis (p = .344).

Conclusions

Plasma calprotectin levels are elevated in uveitis patients and are influenced by age and anatomical location of uveitis. Further investigation is needed to assess the relationship between calprotectin and uveitis activity.

Acknowledgments

We would like to thank David Hervás and Jorge Mora for their kind help with the statistical analysis, Victoria Núñez for the patient management and Javier Campos for the writing support.

Declaration of interest statement

The authors report no conflicts of interest.

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