RT Journal Article T1 Olfactory Dysfunction as a Biomarker for Early Diagnosis of Cognitive Impairment in Patients With Type 2 Diabetes: A Systematic Review A1 Ramos-Cazorla, Paula A1 Carazo Barrios, Lina A1 Reyes-Bueno, Jose A. A1 Sagües-Sesé, Elena A1 De-Rojas-Leal, Carmen A1 Barbancho, Miguel A. A1 Garzón-Maldonado, Francisco J. A1 de la Cruz-Cosme, C. A1 García-Arnés, Juan A. A1 García-Casares, Natalia K1 Diabetes tipo 2 - Síntomas K1 Memoria - Trastornos K1 Olfato - Trastornos AB Background: Olfactory dysfunction and cognitive impairment (CI) have been associated with Type 2 diabetes (T2DM), but the mechanisms underlying this association are broadly unknown. This systematic review tends to investigate the relationship between the onset of olfactory dysfunction and CI in patients with T2DM and to explore the potential role of olfactory dysfunction as an early diagnosis biomarker of CI.Methods: We conducted a systematic review consulting PubMed and Scopus. The articles considered eligible included patients with T2DM and cognitive and olfactory test.Results: The search identified a total of 145 articles, of which 13 were finally selected. The majority of these studies discovered a correlation between olfactory dysfunction and CI in individuals with T2DM. Additionally, other biomarkers such as functional magnetic resonance imaging demonstrated changes in brain regions associated with the sense of smell in T2DM patients.Conclusions: Olfactory dysfunction could be a biomarker for early diagnosis of CI in T2DM. However, these alterations are highly heterogeneous and more studies that include neuroimaging need to be conducted. PB Wiley YR 2024 FD 2024-12 LK https://hdl.handle.net/10630/36326 UL https://hdl.handle.net/10630/36326 LA eng NO Ramos-Cazorla, P., Carazo-Barrios, L., Reyes-Bueno, J. A., Sagües-Sesé, E., de Rojas-Leal, C., Barbancho, M. A., Garzón-Maldonado, F. J., de la Cruz-Cosme, C., García-Arnés, J. A., García-Casares, N., Southerland, J., & Janet Southerland. (2024). Olfactory Dysfunction as a Biomarker for Early Diagnosis of Cognitive Impairment in Patients With Type 2 Diabetes: A Systematic Review. Journal of Diabetes Research, 2024(1), 9933957-. https://doi.org/10.1155/jdr/9933957 NO Open access funding is enabled and organized by CRUE-CBUA 2024Funding for open access charge: Universidad de Málaga / CBUA DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 21 ene 2026