Stability of Mosaic Divergent Repeat Interruptions in X-Linked Dystonia-Parkinsonism.

Autor: Laß J; Institute of Neurogenetics, University of Lübeck, Lübeck, Germany., Lüth T; Institute of Neurogenetics, University of Lübeck, Lübeck, Germany., Schlüter K; Institute of Neurogenetics, University of Lübeck, Lübeck, Germany., Schaake S; Institute of Neurogenetics, University of Lübeck, Lübeck, Germany., Laabs BH; Institute of Medical Biometry and Statistics, University of Lübeck, Lübeck, Germany., Much C; Institute of Neurogenetics, University of Lübeck, Lübeck, Germany., Jamora RD; Department of Neurosciences, College of Medicine-Philippine General Hospital, University of the Philippines Manila, Manila, Philippines., Rosales RL; Department of Neurology and Psychiatry, University of Santo Tomas and the CNS-Metropolitan Medical Center, Manila, Philippines Section of Neurology, Manila, Philippines., Saranza G; Department of Internal Medicine, Chong Hua Hospital, Cebu, Philippines., Diesta CCE; Department of Neurosciences, Movement Disorders Clinic, Makati Medical Center, Makati City, Philippines., Pearson CE; Department of Molecular Genetics, University of Toronto, Toronto, Canada., König IR; Institute of Medical Biometry and Statistics, University of Lübeck, Lübeck, Germany., Brüggemann N; Institute of Neurogenetics, University of Lübeck, Lübeck, Germany.; Department of Neurology, University of Lübeck, Lübeck, Germany., Klein C; Institute of Neurogenetics, University of Lübeck, Lübeck, Germany., Westenberger A; Institute of Neurogenetics, University of Lübeck, Lübeck, Germany., Trinh J; Institute of Neurogenetics, University of Lübeck, Lübeck, Germany.
Jazyk: angličtina
Zdroj: Movement disorders : official journal of the Movement Disorder Society [Mov Disord] 2024 Jul; Vol. 39 (7), pp. 1145-1153. Date of Electronic Publication: 2024 Apr 14.
DOI: 10.1002/mds.29809
Abstrakt: Background: X-Linked dystonia-parkinsonism (XDP) is an adult-onset neurodegenerative disorder characterized by rapidly progressive dystonia and parkinsonism. Mosaic Divergent Repeat Interruptions affecting motif Length and Sequence (mDRILS) were recently found within the TAF1 SVA repeat tract and were shown to associate with repeat stability and age at onset in XDP, specifically the AGGG [5'-SINE-VNTR-Alu(AGAGGG) 2 AGGG(AGAGGG) n ] mDRILS.
Objective: This study aimed to investigate the stability of mDRILS frequencies and stability of (AGAGGG) n repeat length during transmission in parent-offspring pairs.
Methods: Fifty-six families (n = 130) were investigated for generational transmission of repeat length and mDRILS. The mDRILS stability of 16 individuals was assessed at two sampling points 1 year apart. DNA was sequenced with long-read technologies after long-range polymerase chain reaction amplification of the TAF1 SVA. Repeat number and mDRILS were detected with Noise-Cancelling Repeat Finder (NCRF).
Results: When comparing the repeat domain, 51 of 65 children had either contractions or expansions of the repeat length. The AGGG frequency remained stable across generations at 0.074 (IQR: 0.069-0.078) (z = -0.526; P = 0.599). However, the median AGGG frequency in children with an expansion (0.072 [IQR: 0.066-0.076]) was lower compared with children with retention or contraction (0.080 [IQR: 0.073-0.083]) (z = -0.007; P = 0.003). In a logistic regression model, the AGGG frequency predicted the outcome of either expansion or retention/contraction when including repeat number and sex as covariates (β = 80.7; z-score = 2.63; P = 0.0085). The AGGG frequency varied slightly over 1 year (0.070 [IQR: 0.063-0.080] to 0.073 [IQR: 0.069-0.078]).
Conclusions: Our results show that a higher AGGG frequency may stabilize repeats across generations. This highlights the importance of further investigating mDRILS as a disease-modifying factor with generational differences. © 2024 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
(© 2024 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.)
Databáze: MEDLINE
Externí odkaz: