Investigation of the HDAC4 Copy Number Variation & Its Effect on Gene &

Status Completed

Clinical Trial Summary

Specific Aims of this study:

1. To understand the distribution of HDAC4 CNV in the families of the ASD patients with HDAC4 CNV;

2. To perform the analysis of gene expression;

3. To investigate the HDAC4 protein level expression;

4. To investigate the correlation of clinical/cognitive features with HDAC4 CNV, RNA and protein expression in ASD patients, and compare with their unaffected family members.

Clinical Trial Description

Autism spectrum disorder (ASD) is a common neurodevelopmental disorder affecting up to 1/50 in the world and 1% in Taiwan. ASD is a clinically and genetically heterogeneous complex disorder with high heritability. Due to its high prevalence, lifetime impairment and no effective prevention and treatment, ASD has been prioritized for molecular genetic study. Among the genetic findings based on our copy number variation (CNV) analysis of 335 patients with ASD, HDAC4 gene is selected to help us understand the pathogenesis of ASD by investigating parent-of-origin and the gene and protein expression of this gene, alongside neurocognitive and behavioral phenotypes.

Based on our findings on HDAC4 CNV analysis, the patients with HDAC4 CNVs (~30 patients) and their families will be invited to participate the investigation of the CNV, RNA and protein expression analysis. Five healthy controls without any diagnosis of psychiatric disorders will be recruited to perform the comparison with ASD patients with HDSC4. The autistic symptoms and behavioral phenotypes assessed by the Chinese SCQ and SRS, and the cognitive function assessed by intelligence test and WCST will be used to reveal the associations among the CNVs, RNA expression, protein level and clinical/cognitive phenotypes.

According to our previous CNV findings at the HDAC4 locus, we expect to find CNV in HDAC4 variation in another independent sample of our ASD cohort and to explore how HDAC4 CNVs affect the RNA and protein expression of HDAC4. We anticipate our endeavors will provide the comprehensive profiles of the CNV, RNA and protein expressions and the clinical features of ASD patients with HDAC4 CNVs and contribute to our understanding of the pathogenesis of ASD. ;

Study Design

Related Conditions & MeSH terms

Autism Spectrum Disorder

Clinical Trial Details

NCT number	NCT03670381
Study type	Observational
Source	National Taiwan University Hospital
Contact
Status	Completed
Phase
Start date	January 2017
Completion date	December 2017

View Details

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Investigation of the HDAC4 Copy Number Variation and Its Effect on Gene and Protein Expression in Patients With ASD

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms