RT Conference Proceedings T1 The andalusian “multiplex families with bipolar disorder “: a revaluation of the cohort study (1997-2013). A1 Guzmán, José A1 Mayoral Cleries, Fermín A1 Moreno-Kustner, Berta A1 Rivas, Fabio A1 Romero, Pablo A1 Gay, Eudoxia A1 González, María José A1 Gil, Susana A1 Cabaleiro, Francisco A1 Rio, Francisco A1 Pérez, Fermín A1 Haro, Jesús A1 Nöthen, Markus A1 Streit, Fabian A1 Strohmaier, Jana A1 Rietschel, Marcella K1 Psicosis maniacodepresiva AB Objectives. Bipolar disorder (BD) is highly heritable, and gene identification will elucidate biological factors and gene-environment interactions. Multiplex families represent a promising resource for identifying rare variants and polygenic effects. However, such families are difficult to recruit.In 1997, >100 multiplex Andalusian BD pedigrees - the largest of which contains >20 affected members- were recruited within an Andalusian-German collaboration study. Since then, the Andalusian psychiatric network and biobank facilities have been expanded in order to facilitate psychiatric research. Therefore in 2013, the Andalusian-German collaborators initiated a follow-up study of this cohort in order to identify new genetic and environmental factors for BD aetiology and clinical course. Methods.In 1997, BD patients at Andalusian psychiatric hospitals who reported a family history of BD were asked to inform their families about the study. All consenting family members (N= 937; BPI/II=265; Recurrent Mayor Depression=149) were assessed using a structured psychiatric interview for life-time best estimate psychiatric diagnosis (SADS) and the family history method, and blood was obtained for DNA genetic analysis.Follow-up involves reassessment of diagnosis, neuropsychological testing (CANTAB), and the collection of biomaterials (RNA, Plasma, IPS, hair cortisol, etc.). Written informed consent is obtained for all study procedures and analyses. Results. For the first three families, follow-up assessments and biomaterial-processing have been completed. Follow-up of the remaining families is ongoing. Conclusion.This cohort represents a unique resource for the investigation of BD aetiology and clinical course, and will be available to international researchers from other sciences. YR 2014 FD 2014-12-01 LK http://hdl.handle.net/10630/8506 UL http://hdl.handle.net/10630/8506 LA eng NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 20 ene 2026