- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00260897
Molecular Genetic Study of Avascular Necrosis of the Femoral Head
Molecular Genetic Study of Avascular Necrosis of the Femoral Head-Revealing ANFH Pathogenesis Mechanism by Cell and Animal Models
Study Overview
Status
Conditions
Detailed Description
Avascular necrosis of the femoral head (ANFH) is a debilitating disease that usually leads to destruction of the hip joint in the third to fifth decade of life (average age, 36 years). The disease prevalence is unknown, but it has been estimated that 10,000-20,000 new cases per year are diagnosed in the United State. Nearly half of the patients eventually require hip replacement before 40 years of age. The etiology of ANFH is unknown but previous studies indicated that heritable thrombophilia (increased tendency to form thrombi) and hypofibrinolysis (reduced ability to lyse thrombi), alcohol intake, and steroid use are risk factors for ANFH.
Although the majority of idiopathic ANFH cases are sporadic, recently we identified three ANFH families showing autosomal dominant inheritance. By genome-wide scan, a significant two-point LOD score of 3.45 at = 0 was obtained between one ANFH pedigree and marker D12S85 on chromosome 12. High-resolution mapping was conducted in a second ANFH family and replicated the linkage to D12S368. When an age-dependent penetrance model was applied, the combined multipoint LOD score achieved 6.43 between D12S1663 and D12S85. Furthermore, by using haplotype analysis and gene-based mutation detection, we have identified the collagen type II, alpha 1 (COL2A1) gene, as the ANFH disease gene. Re-sequencing of the type II collagen (COL2A1) gene demonstrated a glycine with serine mutation in the G-X-Y repeat of type II collagen, in all affected individuals in three pedigrees. In the Pedigree I, a 3665G >A mutation in exon 50 of the COL2A1 gene (Genbank accession number NM_001844) and the substitution resulted in a Gly1170Ser codon change (Genbank accession number NP_001835). A second pedigree was shown to harbor the same mutation but the mutant allele existed in a different haplotype background. In a third pedigree, a 2306G>A mutation occurred in exon 33 of the gene (Genbank accession number NM_001844), causing glycine to serine change at codon 717 (Genbank accession number NP_001835).
On this basis, we propose to study the pathophysiological mechanism(s) of inherited and sporadic ANFH. The main focus of this project includes: (1) Establishing cell line and animal models to investigate the molecular basis of ANFH pathogenesis. (2) Conducting genetic analysis on sporadic ANFH cases, including those who are idiopathic, alcohol consumers or steroid-induced. (3) Using COL2A1 gene as a target, we will design novel therapeutics and prediction procedures to improve the management of the ANFH patients.
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Contact
- Name: Shih-Feng Tsai, M.D., Ph.D.
- Phone Number: 35300 (886)-37-246-166
- Email: petsai@nhri.org.tw
Study Locations
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Miaoli County, Taiwan, 350
- Recruiting
- Division of Molecular and Genomic Medicine, National Health Research Institutes
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Contact:
- Shih-Feng Tsai, M.D, Ph.D
- Phone Number: 35300 (886)-37-246-166
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Child
- Adult
- Older Adult
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- avascular necrosis of the femoral head
Exclusion Criteria:
-
Study Plan
How is the study designed?
Design Details
Collaborators and Investigators
Investigators
- Principal Investigator: Wei-Ming Chen, M.D., Department of Orthopaedics and Traumatology, Taipei Veterans General Hospital
Publications and helpful links
Helpful Links
Study record dates
Study Major Dates
Study Start
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- EC 9206002
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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