Clinical Trials Logo

Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT00155168
Other study ID # 9361700452
Secondary ID
Status Recruiting
Phase N/A
First received September 9, 2005
Last updated September 9, 2005
Start date April 2004

Study information

Verified date April 2004
Source National Taiwan University Hospital
Contact Yi-Ning su, MD,PhD
Phone 886-2-23123456
Email ynsu@ntumc.org
Is FDA regulated No
Health authority Taiwan: Department of Health
Study type Observational

Clinical Trial Summary

In this project, we will establish the efficient and accurate gene dose determination system by combining the heterodulex analysis and gene dose analysis on DHPLC platform based on various quantitative and multiplex PCR strategies and applying on detecting the carriers- in- risk and patients with spinal muscular atrophy.This method is, therefore, based on the observation that the amount of PCR product generated from each site of amplification is proportional to the amount of starting template. Detection of PCR products is carried out on DHPLC, which provide the sensitivity required for the detection of the single-copy dosage changes.


Description:

Proximal spinal muscular atrophy is an autosomal recessive disorder with an overall incidence of 1 in 10000 live births and a carrier frequency of 1 in 50. This severe neuromuscular disease is characterized by a degeneration and loss of alpha motor neurons of the spinal cord anterior horn cells, which results in progressive symmetrical weakness, atrophy of the proximal voluntary muscles, and infant death.

Two most identical copies of SMN gene, telomeric SMN (SMN1) and centromeric SMN (SMN2), have been identified. These two SMN genes are highly homologous and differing in only five nucleotide exchanges within their 3’ regions. These variations do not alter the encoded amino acids. These nucleotide differences located in exons 7 and 8, allow SMN1 gene to be distinguished from SMN2 gene.

It has been reported that more than 95% of SMA patients were homozygous deletion of SMN1 gene. Therefore, the detection of the absence of SMN1 can be a useful tool for SMA diagnosis. Furthermore, because of the high incidence of SMA, the high carrier frequency of at least 1 in 50, the severity of the disease in the patients, and the lack of effective of treatment, carrier testing for SMN1 deletion is an important question in genetic counseling. However, a highly homologous SMN2 gene also exits and hampers the detection of the loss of SMN1 which makes the detection of SMA carrier test difficult.

Here, we present a new, rapid, simple and high reliable method to detect the SMN1 deletion and to determine the copy number of the SMN1 and SMN2 by denaturing high-performance liquid chromatography (DHPLC). DHPLC is a novel, simple, fast and non gel-base method that is very sensitive and specific for detection DNA variations. Furthermore, we describe a multiplex PCR strategy to determine the SMN1 and SMN2 genes copy number in order to avoid bias due to fluctuations in the copy number of SMN genes. The assay uses the X-linked CYBB gene and KRIT1 gene as standards to determine the relative gene dosage of SMN1 and SMN2 genes. We demonstrate that this assay is able to accurately distinguish 2 gene copies from 4 gene copies and it can identify SMA carriers and normal populations by the accurate determination of SMN copy number.

This project will contribute to apply this novel, fast, and reliable tool for diagnosis of SMA and carrier detection of SMN1 and SMN2 genes by using DHPLC system.


Recruitment information / eligibility

Status Recruiting
Enrollment 500
Est. completion date
Est. primary completion date
Accepts healthy volunteers Accepts Healthy Volunteers
Gender Both
Age group N/A and older
Eligibility Inclusion Criteria:

- Clinical diagnosis of Spinal muscular atrophy

Exclusion Criteria:

Study Design

Observational Model: Case Control, Primary Purpose: Screening, Time Perspective: Longitudinal


Locations

Country Name City State
Taiwan Dept of Medical Genetics;National Taiwan University Hospital Taipei

Sponsors (1)

Lead Sponsor Collaborator
National Taiwan University Hospital

Country where clinical trial is conducted

Taiwan, 

See also
  Status Clinical Trial Phase
Completed NCT04851873 - Safety and Efficacy of Intravenous OAV101 (AVXS-101) in Pediatric Patients With Spinal Muscular Atrophy (SMA) Phase 3
Completed NCT03223051 - Development of a Space Exploration Assessment for Children With Spinal Muscular Atrophy N/A
Completed NCT04335942 - Characterization of the Postural Habits of Wheelchair Users Analysis of the Acceptability of International Recommendations in the Prevention of Pressure Sores Risk by Using a Connected Textile Sensor N/A
Recruiting NCT05794139 - Safety and Efficacy of NMD670 in Ambulatory Adult Patients With Type 3 Spinal Muscular Atrophy Phase 2
Not yet recruiting NCT06300996 - Spinal Cord Stimulation for the Treatment of Motor Deficits in People With Spinal Muscular Atrophy - Upper Limb N/A
Not yet recruiting NCT00961103 - Motor Development and Orthoses in Spinal Muscular Atrophy (SMA) N/A
Completed NCT02003937 - Aerobic Training in Patients With Spinal Muscular Atrophy Type III N/A
Completed NCT00227266 - Valproic Acid and Carnitine in Patients With Spinal Muscular Atrophy Phase 2
Completed NCT00374075 - Study of Safety and Dosing Effect on SMN Levels of Valproic Acid (VPA) in Patients With Spinal Muscular Atrophy Phase 1
Enrolling by invitation NCT05539456 - Reliability and Validity of the Turkish Version of the PedsQL 3.0 Neuromuscular Module for 2-to 4- Year-old
Recruiting NCT05779956 - Personalized Medicine for SMA: a Translational Project
Recruiting NCT03217578 - Neonatal Spinal Muscular Atrophy (SMA) Screening
Recruiting NCT03300869 - Natural History of Types 2 and 3 SMA in Taiwan
Completed NCT01703988 - An Open-label Safety, Tolerability and Dose-Range Finding Study of Multiple Doses of Nusinersen (ISIS 396443) in Participants With Spinal Muscular Atrophy Phase 1/Phase 2
Withdrawn NCT02235090 - Study of Feasibility to Reliably Measure Functional Abilities' Changes in Nonambulant Neuromuscular Patients Without Trial Site Visiting N/A
Completed NCT02123186 - Newborn Screening for Spinal Muscular Atrophy N/A
Completed NCT00756821 - A Pilot Study of Biomarkers for Spinal Muscular Atrophy N/A
Completed NCT00004771 - Phase II Study of Leuprolide and Testosterone for Men With Kennedy's Disease or Other Motor Neuron Disease Phase 2
Recruiting NCT05366465 - Quality of Life and Participation of the Adult With Spinal Muscular Atrophy in France
Recruiting NCT06310421 - Spinal Muscular Atrophy Neonatal Screening Program