RT Journal Article T1 Recent Research in Ocular Cystinosis: Drug Delivery Systems, Cysteamine Detection Methods and Future Perspectives A1 Castro Balado, Ana A1 Mondelo García, Cristina A1 Varela Rey, Iria A1 Moreda Vizcaíno, Beatriz A1 Sierra Sánchez, Jesús F. A1 Rodríguez Ares, María Teresa A1 Hermelo Vidal, Gonzalo A1 Zarra Ferro, Irene A1 González Barcia, Miguel A1 Yebra-Pimentel Vilar, Eva A1 Giráldez Fernández, María Jesús A1 Otero Espinar, Francisco Javier A1 Fernández Ferreiro, Anxo K1 Cystinosis K1 Ophthalmic administration K1 Cysteamine K1 Drug delivery systems K1 Analytical chemistry methods AB Cystinosis is a rare genetic disorder characterized by the accumulation of cystine crystals in different tissues and organs. Although renal damage prevails during initial stages, the deposition of cystine crystals in the cornea causes severe ocular manifestations. At present, cysteamine is the only topical effective treatment for ocular cystinosis. The lack of investment by the pharmaceutical industry, together with the limited stability of cysteamine, make it available only as two marketed presentations (Cystaran® and Cystadrops®) and as compounding formulations prepared in pharmacy departments. Even so, new drug delivery systems (DDSs) need to be developed, allowing more comfortable dosage schedules that favor patient adherence. In the last decades, different research groups have focused on the development of hydrogels, nanowafers and contact lenses, allowing a sustained cysteamine release. In parallel, different determination methods and strategies to increase the stability of the formulations have also been developed. This comprehensive review aims to compile all the challenges and advances related to new cysteamine DDSs, analytical determination methods, and possible future therapeutic alternatives for treating cystinosis PB MDPI YR 2020 FD 2020 LK http://hdl.handle.net/10347/23988 UL http://hdl.handle.net/10347/23988 LA eng NO Castro-Balado, A.; Mondelo-García, C.; Varela-Rey, I.; Moreda-Vizcaíno, B.; Sierra-Sánchez, J.F.; Rodríguez-Ares, M.T.; Hermelo-Vidal, G.; Zarra-Ferro, I.; González-Barcia, M.; Yebra-Pimentel, E.; Giráldez-Fernández, M.J.; Otero-Espinar, F.J.; Fernández-Ferreiro, A. Recent Research in Ocular Cystinosis: Drug Delivery Systems, Cysteamine Detection Methods and Future Perspectives. Pharmaceutics 2020, 12, 1177 NO This research was funded by Fundación Española de Farmacia Hospitalaria (FEFH 18-19), Fundación Mutua Madrileña (XVI Convocatoria de Ayudas a la Investigación en Salud) and “Asociación La Lucha de Iker”. C.M.-G. and A.F.-F. have funding research grants from Instituto de Salud Carlos III (C.M.-G.-Río Hortega CM18/00090 and A.F.-F.-Juan Rodés JR18/0004) DS Minerva RD 28 abr 2026