PMID- 24086754 OWN - NLM STAT- MEDLINE DCOM- 20140616 LR - 20211021 IS - 1932-6203 (Electronic) IS - 1932-6203 (Linking) VI - 8 IP - 9 DP - 2013 TI - Ubiquilin 2 is not associated with tau pathology. PG - e76598 LID - 10.1371/journal.pone.0076598 [doi] LID - e76598 AB - Accumulation of aberrant proteins in inclusion bodies is a hallmark of many neurodegenerative diseases. Impairment of proteolytic systems is a common event in these protein misfolding diseases. Recently, mutations in the UBQLN 2 gene encoding ubiquilin 2 have been identified in X-linked amyotrophic lateral sclerosis (ALS). Furthermore, ubiquilin 2 is associated with inclusions in familial and sporadic ALS/dementia, synucleinopathies and polyglutamine diseases. Ubiquilin 2 exerts a regulatory role in proteostasis and thus it has been suggested that ubiquilin 2 pathology may be a common event in neurodegenerative diseases. Tauopathies, a heterogenous group of neurodegenerative diseases accompanied with dementia, are characterized by inclusions of the microtubule-binding protein tau. In the present study, we investigate whether ubiquilin 2 is connected with tau pathology in Alzheimer's disease (AD), supranuclear palsy (PSP) and Pick's disease (PiD) and familial cases with frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17). We show that ubiquilin 2 positive inclusions are absent in these tauopathies. Furthermore, we find decreased ubiquilin 2 protein levels in AD patients, but our results do not indicate a correlation with tau pathology. Our data show no evidence for involvement of ubiquilin 2 and indicate that other mechanisms underly the proteostatic disturbances in tauopathies. FAU - Nolle, Anna AU - Nolle A AD - Department of Genome Analysis, Academic Medical Center/University of Amsterdam, Amsterdam, The Netherlands. FAU - van Haastert, Elise S AU - van Haastert ES FAU - Zwart, Rob AU - Zwart R FAU - Hoozemans, Jeroen J M AU - Hoozemans JJ FAU - Scheper, Wiep AU - Scheper W LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130926 PL - United States TA - PLoS One JT - PloS one JID - 101285081 RN - 0 (Adaptor Proteins, Signal Transducing) RN - 0 (Autophagy-Related Proteins) RN - 0 (Cell Cycle Proteins) RN - 0 (UBQLN2 protein, human) RN - 0 (Ubiquitins) RN - 0 (tau Proteins) SB - IM MH - Adaptor Proteins, Signal Transducing MH - Aged MH - Aged, 80 and over MH - Autophagy-Related Proteins MH - Cell Cycle Proteins/*metabolism MH - Cell Line, Tumor MH - Humans MH - Middle Aged MH - Neurodegenerative Diseases/*metabolism/*pathology MH - Ubiquitins/*metabolism MH - tau Proteins/*metabolism PMC - PMC3784422 COIS- Competing Interests: The authors have declared that no competing interests exist. EDAT- 2013/10/03 06:00 MHDA- 2014/06/17 06:00 PMCR- 2013/09/26 CRDT- 2013/10/03 06:00 PHST- 2013/06/07 00:00 [received] PHST- 2013/09/03 00:00 [accepted] PHST- 2013/10/03 06:00 [entrez] PHST- 2013/10/03 06:00 [pubmed] PHST- 2014/06/17 06:00 [medline] PHST- 2013/09/26 00:00 [pmc-release] AID - PONE-D-13-23099 [pii] AID - 10.1371/journal.pone.0076598 [doi] PST - epublish SO - PLoS One. 2013 Sep 26;8(9):e76598. doi: 10.1371/journal.pone.0076598. eCollection 2013.