RT Journal Article T1 Hair cortisol level as a molecular biomarker in retinitis pigmentosa patients. A1 Mateos-Olivares, M A1 Sobas, E M A1 Puertas-Neyra, K A1 Peralta-Ramirez, M I A1 Gonzalez-Perez, R A1 Martin-Vallejo, J A1 Garcia-Vazquez, C A1 Coco, R M A1 Pastor, J C A1 Pastor-Idoate, S A1 Usategui-Martin, R K1 Chronic stress K1 Hair cortisol concentration K1 Negative psychological states K1 Retinitis pigmentosa K1 Variations in vision AB Retinitis pigmentosa (RP) patients commonly experience negative psychological states due to their progressive and unpredictable loss of vision and visual variations related to stress. The aim of this study was to examine hair cortisol concentrations (HCCs), which is usually associated with chronic stress, pretending to unveil possible associations between underlying psychological factors and disease severity in RP patients. Seventy-eight RP patients and 148 healthy controls were included in this study. A complete ophthalmological exam was performed in all patients to grade into severity disease groups. Perceived stress and trait-anxiety were measured by the State-Trait Anxiety Inventory (STAI) questionnaire. Fifty-two (67%) patients had severe RP and 26 (33%) mild-moderate RP. Fifty-eight (58,9%) patients reported severely levels of stress and 18 (23.,1%) highly levels assessed by STAI questionnaire. RP patients exhibited higher HCCs (500.04 ± 120.99 pg/mg) than in controls (136.17 ± 60.51 pg/mg; p  HCC seems an effective biomarker associated with chronic stress in RP patients. This study shows that HCC in patients with RP are elevated compared to population-based controls, and association between HCC and RP severity was found. Future research is needed to characterize the effect of untreated negative psychological states on progression of the disease if any. PB Academic Press YR 2022 FD 2022-02-25 LK http://hdl.handle.net/10668/22225 UL http://hdl.handle.net/10668/22225 LA en NO Mateos-Olivares M, Sobas EM, Puertas-Neyra K, Peralta-Ramírez MI, González-Pérez R, Martín-Vallejo J, et al. Hair cortisol level as a molecular biomarker in retinitis pigmentosa patients. Exp Eye Res. 2022 Jun;219:109019. DS RISalud RD Apr 5, 2025