AUTHOR=Eraghi Armin Taghavi , Garweg Justus G. , Pleyer Uwe 

TITLE=The role of age in ocular toxoplasmosis: clinical signs of immunosenescence and inflammaging

JOURNAL=Frontiers in Medicine

VOLUME=Volume 11 - 2024

YEAR=2024

URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2024.1311145

DOI=10.3389/fmed.2024.1311145

ISSN=2296-858X

ABSTRACT=Purpose: To investigate the association between age, immune response, and the clinical presentation in ocular toxoplasmosis (OT).Design: This was a monocentric, retrospective, observational cohort study.A review of medical records of patients with active OT at the Uveitis Center, Charité Universitätsmedizin was conducted. Baseline parameters included age at presentation, visual acuity, intraocular pressure (IOP), size and location of active lesions, inflammatory activity, antibody index (AI), and complications of intraocular inflammation. The data are presented as mean ± standard deviation (SD). The level of significance was set at p < 0.05.Results: Between 1998 and 2019, 290 patients with active OT were diagnosed at our tertiary reference center. The mean age was 37.7 ± 17.1 years, 53.8% were females, and 195 patients (70.9%) showed recurrent disease. Older age was associated with lower-baseline visual acuity (p = 0.043), poor visual outcome (p = 0.019), increased inflammatory activity (p < 0.005), and larger retinal lesions (p < 0.005). Older patients presented a lower AI (<35 years: 45.1 ± 82.7, median: 12.1; ≥35 years: 18.6 ± 50.5, median: 5.8; p = 0.046), confirmed by a decrease of AI with increasing age (R² = 0.045; p = 0.024). Finally, AI was correlated with lesion size (multiple linear regression analysis: p = 0.043). Macular involvement (24.3% of patients) was positively correlated with complications (macular/peripapillary edema and retinal detachment, p < 0.005) and poor visual outcome (p < 0.005), and was negatively correlated with inflammatory activity (p < 0.005).We found a strong and clinically-relevant impact of age on the clinical presentation and course of OT. While an unspecific inflammatory response increased with age, the specific, local humoral immune response declined. These findings are well in line with the concept of immunosenescence and inflammageing in uveitis.