Sunday 
 
 
2:00 pm - 9:00 pm 
	
Arrival and Check-in
 
 
						 
						 
					
						
						
6:00 pm - 7:00 pm 
	
Dinner
 
 
						 
						 
					
						
						
7:30 pm - 7:40 pm 
	
Introductory Comments by GRC Staff / Welcome and Introduction from the Chairs
 
 
						 
						 
					
						
						
7:40 pm - 9:30 pm 
	
Keynote Session: The Pathway From the Lab to the Clinic 
 
 
 
						 
						 
					
						
						
7:40 pm - 7:50 pm 
	
Introduction by Discussion Leader
 
 
						 
						 
					
						
						
7:50 pm - 8:25 pm 
	
"Potential Disease-Modifying Therapies for Huntington's Disease: Lessons Learned and Future Opportunities" 
 
 
 
						 
						 
					
						
						
8:25 pm - 8:35 pm 
	
Discussion
 
 
						 
						 
					
						
						
8:35 pm - 9:10 pm 
	
"Developing Treatment for Spinal and Bulbar Muscular Atrophy" 
 
 
 
						 
						 
					
						
						
9:10 pm - 9:20 pm 
	
Discussion
 
 
						 
						 
					
						
						
9:20 pm - 9:30 pm 
	
General Discussion
 
 
						 
						 
					
						
						
	Monday 
 
 
7:30 am - 8:30 am 
	
Breakfast
 
 
						 
						 
					
						
						
9:00 am - 12:30 pm 
	
Repeat Expansions: Discovery, Diagnosis and Dynamics 
 
 
 
						 
						 
					
						
						
9:00 am - 9:05 am 
	
Introduction by Discussion Leader
 
 
						 
						 
					
						
						
9:05 am - 9:25 am 
	
"Genome-Wide Analysis Identifies Population-Specific Triplet Repeat Expansions" 
 
 
 
						 
						 
					
						
						
9:25 am - 9:35 am 
	
Discussion
 
 
						 
						 
					
						
						
9:35 am - 9:55 am 
	
"Advances in Repeat Expansion Disorders: New Tools for Gene Discovery and Diagnostics" 
 
 
 
						 
						 
					
						
						
9:55 am - 10:05 am 
	
Discussion
 
 
						 
						 
					
						
						
10:05 am - 10:25 am 
	
"Sequence Structure and Somatic Mosaicism of the HTT  Repeat and Other CAG/CTG Repeat Expansion Loci" 
 
 
 
						 
						 
					
						
						
10:25 am - 10:35 am 
	
Discussion
 
 
						 
						 
					
						
						
10:35 am - 11:00 am 
	
Coffee Break
 
 
						 
						 
					
						
						
11:00 am - 11:10 am 
	
"Isolation and Detection of a Novel Repeat Expansion for Alzheimer’s Disease" 
 
 
 
						 
						 
					
						
						
11:10 am - 11:15 am 
	
Discussion
 
 
						 
						 
					
						
						
11:15 am - 11:25 am 
	
"Autosomal Dominant Optic Disc Drusen as a CAG Repeat Disorder" 
 
 
 
						 
						 
					
						
						
11:25 am - 11:30 am 
	
Discussion
 
 
						 
						 
					
						
						
11:30 am - 11:40 am 
	
"CAG Repeat Expansion in EP400 is a Candidate Causal Variant for Cerebellar Ataxia in a European Family" 
 
 
 
						 
						 
					
						
						
11:40 am - 11:45 am 
	
Discussion
 
 
						 
						 
					
						
						
11:45 am - 11:55 am 
	
"HTT Repeat Instability in Family Trios in the 100,000 Genomes Project" 
 
 
 
						 
						 
					
						
						
11:55 am - 12:00 pm 
	
Discussion
 
 
						 
						 
					
						
						
12:00 pm - 12:10 pm 
	
"Genomic Characterization of Huntington Disease Genetic Modifiers Informs Drug Target Tractability" 
 
 
 
						 
						 
					
						
						
12:10 pm - 12:15 pm 
	
Discussion
 
 
						 
						 
					
						
						
12:15 pm - 12:30 pm 
	
General Discussion
 
 
						 
						 
					
						
						
12:30 pm - 1:30 pm 
	
Lunch
 
 
						 
						 
					
						
						
1:30 pm - 4:00 pm 
	
Free Time
 
 
						 
						 
					
						
						
4:00 pm - 6:00 pm 
	
Poster Session 
 
 
						 
						 
					
						
						
6:00 pm - 7:00 pm 
	
Dinner
 
 
						 
						 
					
						
						
7:30 pm - 9:30 pm 
	
Modifiers of Repeat Instability and Cellular Toxicity 
 
 
 
						 
						 
					
						
						
7:30 pm - 7:35 pm 
	
Introduction by Discussion Leader
 
 
						 
						 
					
						
						
7:35 pm - 7:55 pm 
	
"Crosstalk Between DNA Repair Systems in CAG Repeat Expansion" 
 
 
 
						 
						 
					
						
						
7:55 pm - 8:05 pm 
	
Discussion
 
 
						 
						 
					
						
						
8:05 pm - 8:25 pm 
	
"Cas9 Nickase-Induced Contraction of Expanded CAG/CTG Repeats" 
 
 
 
						 
						 
					
						
						
8:25 pm - 8:35 pm 
	
Discussion
 
 
						 
						 
					
						
						
8:35 pm - 8:45 pm 
	
"Antagonistic Roles of Canonical and Alternative RPA in Tandem CAG Repeat Diseases" 
 
 
 
						 
						 
					
						
						
8:45 pm - 8:50 pm 
	
Discussion
 
 
						 
						 
					
						
						
8:50 pm - 9:00 pm 
	
"Ribonucleoside-Diphosphate Reductase Subunit M2 B (RRM2B) as a Genetic Modifier in Huntington’s Disease" 
 
 
 
						 
						 
					
						
						
9:00 pm - 9:05 pm 
	
Discussion
 
 
						 
						 
					
						
						
9:05 pm - 9:15 pm 
	
"CRISPR-Based Screens to Define Endogenous Molecular Chaperones that Modify Polyglutamine Protein Aggregation in Different Cellular Compartments" 
 
 
 
						 
						 
					
						
						
9:15 pm - 9:20 pm 
	
Discussion
 
 
						 
						 
					
						
						
9:20 pm - 9:30 pm 
	
General Discussion
 
 
						 
						 
					
						
						
	Tuesday 
 
 
7:30 am - 8:30 am 
	
Breakfast
 
 
						 
						 
					
						
						
8:30 am - 9:00 am 
	
Group Photo
 
 
						 
						 
					
						
						
9:00 am - 12:30 pm 
	
Cell Type Specific Vulnerabilities to Circuit Dysfunction 
 
 
 
						 
						 
					
						
						
9:00 am - 9:05 am 
	
Introduction by Discussion Leader
 
 
						 
						 
					
						
						
9:05 am - 9:25 am 
	
"Somatic CAG-Repeat Expansion and Resulting Biological Changes in Human Brain Cells" 
 
 
 
						 
						 
					
						
						
9:25 am - 9:35 am 
	
Discussion
 
 
						 
						 
					
						
						
9:35 am - 9:55 am 
	
"Single-Cell Dissection of the Human Striatum and Cerebellum Reveals Intrinsic Vulnerabilities of GABAergic Projection Neurons in CAG Triplet Repeat Disorders" 
 
 
 
						 
						 
					
						
						
9:55 am - 10:05 am 
	
Discussion
 
 
						 
						 
					
						
						
10:05 am - 10:15 am 
	
"Cell Type Specific CAG Repeat Expansions and Toxicity of Mutant Huntingtin in Human Striatum" 
 
 
 
						 
						 
					
						
						
10:15 am - 10:20 am 
	
Discussion
 
 
						 
						 
					
						
						
10:20 am - 10:45 am 
	
Coffee Break
 
 
						 
						 
					
						
						
10:45 am - 11:05 am 
	
"Elucidating Cellular Interplay and Molecular Mechanisms in SCA1 Neurodegeneration" 
 
 
 
						 
						 
					
						
						
11:05 am - 11:15 am 
	
Discussion
 
 
						 
						 
					
						
						
11:15 am - 11:25 am 
	
"Deficits in Oligodendrocyte Differentiation Found Early in SCA3 Disease Pathogenesis" 
 
 
 
						 
						 
					
						
						
11:25 am - 11:30 am 
	
Discussion
 
 
						 
						 
					
						
						
11:30 am - 11:40 am 
	
"Study of SBMA Mutant AR in Isogenic Human Induced Pluripotent Stem Cell-Derived Motor Neurons and Skeletal Muscle" 
 
 
 
						 
						 
					
						
						
11:40 am - 11:45 am 
	
Discussion
 
 
						 
						 
					
						
						
11:45 am - 11:55 am 
	
"Highly Multiplexed Single Nuclei RNA-seq of zQ175 Mouse Model Identifies Region-Specific Signatures of HD Disease Progression" 
 
 
 
						 
						 
					
						
						
11:55 am - 12:00 pm 
	
Discussion
 
 
						 
						 
					
						
						
12:00 pm - 12:10 pm 
	
""Cajal's Challenge Accepted: Generating New Neurons in the Adult Healthy and Diseased Brain"." 
 
 
 
						 
						 
					
						
						
12:10 pm - 12:15 pm 
	
Discussion
 
 
						 
						 
					
						
						
12:15 pm - 12:30 pm 
	
General Discussion
 
 
						 
						 
					
						
						
12:30 pm - 1:30 pm 
	
Lunch
 
 
						 
						 
					
						
						
1:30 pm - 4:00 pm 
	
Free Time
 
 
						 
						 
					
						
						
4:00 pm - 6:00 pm 
	
Poster Session 
 
 
						 
						 
					
						
						
6:00 pm - 7:00 pm 
	
Dinner
 
 
						 
						 
					
						
						
7:30 pm - 9:30 pm 
	
Altered RNA and Protein Metabolism 
 
 
 
						 
						 
					
						
						
7:30 pm - 7:35 pm 
	
Introduction by Discussion Leader
 
 
						 
						 
					
						
						
7:35 pm - 7:55 pm 
	
"The Incomplete Splicing of the Huntingtin Transcript" 
 
 
 
						 
						 
					
						
						
7:55 pm - 8:05 pm 
	
Discussion
 
 
						 
						 
					
						
						
8:05 pm - 8:25 pm 
	
"Repeat Expansions Instigate Supply Chain Issues in the Nucleus and Cytoplasm" 
 
 
 
						 
						 
					
						
						
8:25 pm - 8:35 pm 
	
Discussion
 
 
						 
						 
					
						
						
8:35 pm - 8:45 pm 
	
"The Role of Ubiquitin in Mutant PolyQ Protein Degradation" 
 
 
 
						 
						 
					
						
						
8:45 pm - 8:50 pm 
	
Discussion
 
 
						 
						 
					
						
						
8:50 pm - 9:00 pm 
	
"Toxic Sense and Antisense RAN Proteins Accumulate in the CAG:CTG Polyglutamine Spinocerebellar Ataxias" 
 
 
 
						 
						 
					
						
						
9:00 pm - 9:05 pm 
	
Discussion
 
 
						 
						 
					
						
						
9:05 pm - 9:15 pm 
	
"Widespread Alternative Splicing is a Presymptomatic Transcriptomic Hallmark of CAG Expansion Spinocerebellar Ataxias" 
 
 
 
						 
						 
					
						
						
9:15 pm - 9:20 pm 
	
Discussion
 
 
						 
						 
					
						
						
9:20 pm - 9:30 pm 
	
General Discussion
 
 
						 
						 
					
						
						
	Wednesday 
 
 
7:30 am - 8:30 am 
	
Breakfast
 
 
						 
						 
					
						
						
9:00 am - 12:30 pm 
	
Normal Protein Function and New Mechanisms of Dysfunction in Disease 
 
 
 
						 
						 
					
						
						
9:00 am - 9:05 am 
	
Introduction by Discussion Leader
 
 
						 
						 
					
						
						
9:05 am - 9:25 am 
	
"Huntington Disease: From Abnormal Brain Development to Late Onset" 
 
 
 
						 
						 
					
						
						
9:25 am - 9:35 am 
	
Discussion
 
 
						 
						 
					
						
						
9:35 am - 9:55 am 
	
"Ataxin-3: A Deubiquitylase and its Links to Neurodegeneration" 
 
 
 
						 
						 
					
						
						
9:55 am - 10:05 am 
	
Discussion
 
 
						 
						 
					
						
						
10:05 am - 10:15 am 
	
"Cryo-ET structure of Huntingtin Actin-Filament Complex" 
 
 
 
						 
						 
					
						
						
10:15 am - 10:20 am 
	
Discussion
 
 
						 
						 
					
						
						
10:20 am - 10:45 am 
	
Coffee Break
 
 
						 
						 
					
						
						
10:45 am - 11:05 am 
	
"Delineating Novel Pathways of PolyQ Neurodegeneration in Cerebellar Ataxias: Lessons From SCA7" 
 
 
 
						 
						 
					
						
						
11:05 am - 11:15 am 
	
Discussion
 
 
						 
						 
					
						
						
11:15 am - 11:35 am 
	
"Structured and Disordered Domains Antagonize to Balance Neuronal Ribonucleoprotein Granule Dynamics" 
 
 
 
						 
						 
					
						
						
11:35 am - 11:40 am 
	
Discussion
 
 
						 
						 
					
						
						
11:40 am - 11:50 am 
	
"Unravelling the Mechanisms of Transcriptional Dysregulation in Spinal and Bulbar Muscular Atrophy" 
 
 
 
						 
						 
					
						
						
11:50 am - 11:55 am 
	
Discussion
 
 
						 
						 
					
						
						
11:55 am - 12:05 pm 
	
"Engagement of the Unfolded Protein Response Prevents Calcium Dyshomeostasis and Explains Late Disease Onset in Spinocerebellar Ataxia Type 6" 
 
 
 
						 
						 
					
						
						
12:05 pm - 12:10 pm 
	
Discussion
 
 
						 
						 
					
						
						
12:10 pm - 12:20 pm 
	
"PIAS1 as a Potential Therapeutic Target for HD: Ultrastructure and Function" 
 
 
 
						 
						 
					
						
						
12:20 pm - 12:25 pm 
	
Discussion
 
 
						 
						 
					
						
						
12:25 pm - 12:30 pm 
	
General Discussion
 
 
						 
						 
					
						
						
12:30 pm - 1:30 pm 
	
Lunch
 
 
						 
						 
					
						
						
1:30 pm - 4:00 pm 
	
Free Time
 
 
						 
						 
					
						
						
4:00 pm - 6:00 pm 
	
Poster Session 
 
 
						 
						 
					
						
						
6:00 pm - 7:00 pm 
	
Dinner
 
 
						 
						 
					
						
						
7:30 pm - 9:30 pm 
	
Beyond CAG: Other Repeats and Intersecting Mechanisms 
 
 
 
						 
						 
					
						
						
7:30 pm - 7:35 pm 
	
Introduction by Discussion Leader
 
 
						 
						 
					
						
						
7:35 pm - 7:55 pm 
	
"Insights Into RFC1 CANVAS Spectrum Disorder" 
 
 
 
						 
						 
					
						
						
7:55 pm - 8:05 pm 
	
Discussion
 
 
						 
						 
					
						
						
8:05 pm - 8:25 pm 
	
"TCF4  Triplet Repeat-Mediated Fuchs Endothelial Corneal Dystrophy: Molecular Insights into a Common Cause of Age-Related Visual Impairment" 
 
 
 
						 
						 
					
						
						
8:25 pm - 8:35 pm 
	
Discussion
 
 
						 
						 
					
						
						
8:35 pm - 8:55 pm 
	
"Translation of GGC Repeats Located in Genomic Sequences Annotated as “Non-Coding” Into Novel and Toxic PolyGlycine Proteins in Neurodegenerative and Neuromuscular Diseases" 
 
 
 
						 
						 
					
						
						
8:55 pm - 9:05 pm 
	
Discussion
 
 
						 
						 
					
						
						
9:05 pm - 9:15 pm 
	
"Genetic Modifiers of Somatic CAG and GAA Repeat Expansions in HD and Friedreich Ataxia Mouse Models" 
 
 
 
						 
						 
					
						
						
9:15 pm - 9:20 pm 
	
Discussion
 
 
						 
						 
					
						
						
9:20 pm - 9:30 pm 
	
General Discussion
 
 
						 
						 
					
						
						
	Thursday 
 
 
7:30 am - 8:30 am 
	
Breakfast
 
 
						 
						 
					
						
						
8:30 am - 9:00 am 
	
Business Meeting 
Nominations for the Next Vice Chair(s); Complete the GRC Evaluation Forms; Discuss Future Dates and Venue; Election of the Next Vice Chair(s) 
 
 
						 
						 
					
						
						
9:00 am - 12:30 pm 
	
Therapeutics I: Biological Insights and Novel Strategies 
 
 
 
						 
						 
					
						
						
9:00 am - 9:05 am 
	
Introduction by Discussion Leader
 
 
						 
						 
					
						
						
9:05 am - 9:25 am 
	
"RNAi-Based Modulation of HTT mRNA Variants and Somatic Repeat Expansion in Huntington’s Disease" 
 
 
 
						 
						 
					
						
						
9:25 am - 9:35 am 
	
Discussion
 
 
						 
						 
					
						
						
9:35 am - 9:55 am 
	
"HTT Inactivation Strategies and Long-Term Effects in Adult Mice" 
 
 
 
						 
						 
					
						
						
9:55 am - 10:05 am 
	
Discussion
 
 
						 
						 
					
						
						
10:05 am - 10:15 am 
	
"Mutant Huntingtin Lowering Averts Changes in Lipids Important for Synapse Function and White Matter Maintenance in the LacQ140 Mouse Model" 
 
 
 
						 
						 
					
						
						
10:15 am - 10:20 am 
	
Discussion
 
 
						 
						 
					
						
						
10:20 am - 10:45 am 
	
Coffee Break
 
 
						 
						 
					
						
						
10:45 am - 10:55 am 
	
"Restoring Energy Sources in Huntington’s Disease to Rescue Axonal Transport and Slow Down Neurodegeneration" 
 
 
 
						 
						 
					
						
						
10:55 am - 11:00 am 
	
Discussion
 
 
						 
						 
					
						
						
11:00 am - 11:10 am 
	
"Extracellular Vesicles-Mediated Delivery of CRISPR/Cas9 Systems to Treat Machado-Joseph Disease" 
 
 
 
						 
						 
					
						
						
11:10 am - 11:15 am 
	
Discussion
 
 
						 
						 
					
						
						
11:15 am - 11:25 am 
	
"A Muscle Targeted Gene Therapy for Spinal & Bulbar Muscular Atrophy" 
 
 
 
						 
						 
					
						
						
11:25 am - 11:30 am 
	
Discussion
 
 
						 
						 
					
						
						
11:30 am - 11:40 am 
	
"Gene Editing Strategies to Treat Spinocerebellar Ataxia Type 1" 
 
 
 
						 
						 
					
						
						
11:40 am - 11:45 am 
	
Discussion
 
 
						 
						 
					
						
						
11:45 am - 11:55 am 
	
"BACE1 Inhibition as Therapeutic Avenue for Spinocerebellar Ataxia" 
 
 
 
						 
						 
					
						
						
11:55 am - 12:00 pm 
	
Discussion
 
 
						 
						 
					
						
						
12:00 pm - 12:10 pm 
	
"Optimizing Assays for Accurate Reliable Measurement of NfL and Clinical Validation of the Measurements" 
 
 
 
						 
						 
					
						
						
12:10 pm - 12:15 pm 
	
Discussion
 
 
						 
						 
					
						
						
12:15 pm - 12:30 pm 
	
General Discussion
 
 
						 
						 
					
						
						
12:30 pm - 1:30 pm 
	
Lunch
 
 
						 
						 
					
						
						
1:30 pm - 4:00 pm 
	
Free Time
 
 
						 
						 
					
						
						
4:00 pm - 6:00 pm 
	
Poster Session 
 
 
						 
						 
					
						
						
6:00 pm - 7:00 pm 
	
Dinner
 
 
						 
						 
					
						
						
7:30 pm - 9:30 pm 
	
Therapeutics II: Drug Development to the Clinic 
 
 
 
						 
						 
					
						
						
7:30 pm - 7:35 pm 
	
Introduction by Discussion Leader
 
 
						 
						 
					
						
						
7:35 pm - 7:55 pm 
	
"Drugging DNA Damage Repair Proteins for Trinucleotide Repeat Expansion Diseases" 
 
 
 
						 
						 
					
						
						
7:55 pm - 8:05 pm 
	
Discussion
 
 
						 
						 
					
						
						
8:05 pm - 8:15 pm 
	
"A Small Molecule Approach to Treat the Root Cause of Repeat Expansion Disease" 
 
 
 
						 
						 
					
						
						
8:15 pm - 8:20 pm 
	
Discussion
 
 
						 
						 
					
						
						
8:20 pm - 8:40 pm 
	
"AMT-130: An Investigational Gene Therapy for HD - from Preclinical to Phase 1/2 Clinical Trials" 
 
 
 
						 
						 
					
						
						
8:40 pm - 8:50 pm 
	
Discussion
 
 
						 
						 
					
						
						
8:50 pm - 9:10 pm 
	
"Omaveloxolone: an Approved Agent for Friedreich Ataxia" 
 
 
 
						 
						 
					
						
						
9:10 pm - 9:20 pm 
	
Discussion
 
 
						 
						 
					
						
						
9:20 pm - 9:30 pm 
	
General Discussion
 
 
						 
						 
					
						
						
	Friday 
 
 
7:30 am - 8:30 am 
	
Breakfast
 
 
						 
						 
					
						
						
9:00 am 
	
Departure