Gene Analysis and Treatment Optimization in Chinese Homozygous Familial Hypercholesterolemia

February 17, 2017 updated by: Shuiping Zhao, Central South University

The Study of Gene Analysis and Treatment Optimization in Chinese Homozygous Familial Hypercholesterolemia

Identify new or novel genes which may impact on cholesterol level, and establish the relationship between those gene mutations with atherosclerosis, as well as responses to lipid-lowering drugs.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

To better understand the genetics basis for LDL-C elevation and develop an optimized lipid-lowering strategy, we propose to do the following studies:

  1. To establish a China HoFH registry, and collect DNA and blood samples from all available family members of each proband (pedigrees);
  2. To detect gene mutations known to cause FH and identify family suitable for future whole genome sequencing aimed to identify novel genes controlling cholesterol levels.

3.To establish the relationship between types of gene mutations and lipid and atherosclerosis profile, as well as responses to lipid-lowering agents.

Study Type

Observational

Enrollment (Actual)

5

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
    • Hunan
      • Changsha, Hunan, China, 410011
        • Cardiology department of 2nd Xiangya Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Homozygous Familial Hypercholesterolemia

Description

Inclusion criteria:

Patients of any age and sex who meet clinical or genetic criteria for hoFH as follows:

  • Cutaneous xanthomata before the age of ten years
  • LDLC > 13 mmol/L before treatment or > 7.76 mmol/L despite treatment
  • Phenotypic features in keeping with HeFH in both parents

Exclusion criteria:

Inability of patient, or, if less than 18, a parent, to sign informed consent.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Case-Only
  • Time Perspectives: Retrospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Homozygous Familial Hypercholesterolemia
Gene Analysis for Homozygous Familial Hypercholesterolemia cases
Genetic: Gene analysis
Gene analysis
Other: Historical data of lipid-lowering drug administration
Collecting historical data of lipid-lowering drug administration
Other: Historical data of plasma lipids, xanthoma changes
Collecting historical data of plasma lipids and xanthoma changes

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Number of LDLR Gene Mutations
Time Frame: 1 year

Number of gene mutations based on the sequencing results in terms of some known genes and suspected novel genes.

c.796 G>C and c.1048 C>T in the LDLR gene c.1448 G>A and c.1720C>A in the LDLR gene c.2030 G >A and c.1257 C>A in the LDLR gene homozygous mutation c.605 T>C in the LDLR gene
1 year

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
LDL-C Reduction Percentage
Time Frame: pre-treatment and 6-13 years post treatment

plasma LDL-C reduction percentage with lipid-lowering drugs from pre-treatment to the last time follow-up time point

plasma LDL-C reduction percentage calculation: "plasma LDL-C at pre-treatment time point" minus "plasma LDL-C at the last time follow-up time point", and then compared with "plasma LDL-C at pre-treatment time point", namely "plasma LDL-C reduction percentage".
pre-treatment and 6-13 years post treatment

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Central South University

Investigators

  • Principal Investigator: Shuiping Zhao, Doctor, Central South University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

October 1, 2001

Primary Completion (Actual)

October 1, 2014

Study Completion (Actual)

January 1, 2015

Study Registration Dates

First Submitted

June 7, 2013

First Submitted That Met QC Criteria

June 13, 2013

First Posted (Estimate)

June 17, 2013

Study Record Updates

Last Update Posted (Actual)

February 20, 2017

Last Update Submitted That Met QC Criteria

February 17, 2017

Last Verified

February 1, 2017

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • MISP50469

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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