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Genes Involved in Resistance or Susceptibility to Hepatitis B Virus

NCT00342186 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 2303

Last updated 2020-06-16

No results posted yet for this study

Summary

This study, conducted by the Beijing University First Hospital of China and the National Cancer (NCI), will try to identify genes associated with either susceptibility or resistance to chronic infection by the hepatitis B virus (HBV). Some people recover from HBV infection; others become chronically infected and may go on to develop severe liver disease such as cirrhosis or liver cancer. About 350 million people worldwide have chronic HBV infection. Of 120 million infected Chinese, 90 percent of children infected at less than 5 years of age and 10 percent of infected adults develop persistent infection.

HBV-infected and non-infected healthy persons of Han ethnicity born before 1963 may be eligible for this study. Offspring of infected candidates (born in any year) may also be enrolled. Infected adults must have at least one infected parent or sibling. Persons who resided in Fusui County of Guangxi Zhuang Autonomous Region or in the Qidong district of Jiangsu Province for at least 6 months before 1986 may not participate.

All participants (except offspring of the study subjects) will fill out a health questionnaire (providing information about eating, drinking, and smoking habits and a personal and family health history) and will donate no more than 20 milliliters of blood. The blood will be tested for antibodies, antigens, and other substances that may indicate infection with hepatitis viruses. Some of the blood will be sent to the NCI for DNA analysis to identify genetic factors that may influence clearance of the hepatitis virus after infection or progression to liver diseases associated with HBV infection. Infected patients who have had a liver biopsy in the past will be asked permission to examine tissue from the biopsy and to review laboratory results of any tests done for diagnostic and treatment purposes.

When the study is completed, specimens sent to the NCI will have identifiers linking the material to the donor removed. The anonymous samples may then be used for other genetic studies. Specimens remaining in China will continue to have identifiers linked to them and may be used for future studies designed to identify who is at greatest risk of developing serious liver diseases. Participants who do not want their blood used for future studies may request that the samples be destroyed.

Because children inherit one-half of their DNA from each parent, DNA samples from HBV infected study participants may provide additional information about the parent s DNA structure. Offspring who participate in this study will provide a DNA sample. The sample is obtained by swishing a mouthwash in the mouth for 30 seconds and then spitting the mouth wash into a cup. The DNA is then isolated from the mouth cells.

Conditions

  • Hepatitis, Viral, Human

Sponsors & Collaborators

  • National Cancer Institute (NCI)

    lead NIH

Principal Investigators

  • Daniel W McVicar, Ph.D. · National Cancer Institute (NCI)

Eligibility

Min Age
8 Years
Max Age
90 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2002-09-27
Primary Completion
2018-02-22
Completion
2018-02-22

Countries

  • China

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00342186 on ClinicalTrials.gov