Blood DiseaseNCT00005304
Delta Hepatitis and Liver Disease in Hemophiliacs
An observational study of Blood Disease and Hepatitis, Viral, Human, run by Baylor College of Medicine.
Trial summary
To determine the prevalence of hepatitis delta virus (HDV) in a large cohort of hemophiliacs and to elucidate the role of HDV in the development and progression of liver disease in this population. Read more about this study
- Who is it for?
- Ages Up to 100 years, men only
- Conditions the study is for
- Blood Disease, Hepatitis, Viral, Human, Hemophilia A
- How many people
- Not given
- Where
- No sites listed yet
- Study dates
- Sep 1986to Sep 1991
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Up to 100 years
- Men only
- No healthy volunteers
- Child, Adult, Older adult
No eligibility criteria
About this study
To determine the prevalence of hepatitis delta virus (HDV) in a large cohort of hemophiliacs and to elucidate the role of HDV in the development and progression of liver disease in this population.
Read the detailed description
BACKGROUND:
Patients with classical hemophilia (hemophilia A) and Christmas disease (hemophilia B) were exposed to many hepatotropic viruses during the course of their therapy. Severe chronic hepatitis among these patients was most likely related to persistent infection with non-A,non-B hepatitis virus, hepatitis B virus, or delta hepatitis virus, a defective RNA virus which is dependent upon coinfection with HBV for essential helper functions. Carriers of HBV could contract an acute delta hepatitis infection that was invariably more severe than the illness caused by HBV alone. The morbidity and mortality of delta hepatitis infection was remarkably high. Transmission of the delta hepatitis agent appeared to follow the same routes of transmission as HBV. Direct parenteral inoculation was the classic mode of transmission of HBV which suggested a similar mode of transmission for delta hepatitis.
Hemophiliacs treated with commercial concentrates of coagulation factors prepared from pools of plasma were at great risk to contract delta hepatitis infection. About 50 percent of these patients had delta hepatitis virus antibodies. Also, studies of small cohorts indicated that hepatitis delta infection was a major cause of chronic liver disease and cirrhosis. Therefore, there was a critical need to evaluate the frequency and effect of hepatitis delta infection in hemophiliacs in order to obtain data on the natural history of chronic liver disease, comparing those with presumed chronic non-A,non-B hepatitis B alone, and combined chronic delta and HBV infections.
This grant was awarded in response to a Request for Applications issued in 1986 on the Prevalence and Consequences of Hepatitis Delta Infection in Hemophiliacs. The concept for the initiative originated in the Blood Resources Working Group of the Blood Diseases and Resources Advisory Committee and was approved by the National Heart, Lung, and Blood Advisory Council in February 1985.
DESIGN NARRATIVE:
Both a prevalence study and a longitudinal study were conducted at several centers. In the prevalence study, active hepatitis delta viral infection was established by non-invasive serologic techniques such as hepatitis delta virus RNA/cDNA probes to detect hepatitis delta virus RNA and an immunoblotting method to detect hepatitis delta antigen. These tests avoided the need for liver biopsies to verify infection. In the longitudinal study, patients were assigned to a core or auxiliary groups with those in the core group sampled every six months for biochemical evidence of liver disease and those in the auxiliary group once a year. Serogroups 0,3,5, and 6 and other participants with evidence of delta hepatitis infection were assigned to the core group. Those patients who were immune to hepatitis B virus but were anti-hepatitis delta virus positive were assigned two controls, matched by center, age, sex, and hemophilia diagnosis and severity, from serogroups 5 who were without evidence of hepatitis delta virus infection. Thus, the role of delta virus infection in liver disease in hepatitis delta virus immune patients was evaluated. Follow-up continued for four years.
- Conditions
- Blood Disease, Hepatitis, Viral, Human, Hemophilia A, Liver Diseases
- Medical subject headings
- Hematologic Diseases, Hepatitis, Viral, Human, Hemophilia A, Liver Diseases
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted26 May 2000 (estimated)
- Study startSep 1986
- Study completionSep 1991
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (6)Papers the sponsor has linked to this study.
- Other trials for Blood DiseaseStudies of the same condition, open and under way.
- More trials run by Baylor College of MedicineThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
Sponsor and investigators
- Lead sponsor
- Baylor College of Medicine
- Sponsor type
- University, hospital or other
- Collaborators
- National Heart, Lung, and Blood Institute (NHLBI)
- Responsible party
- Principal investigator, F. Blaine Hollinger, Baylor College of Medicine
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00005304
- Sponsor's protocol ID
- 3005
- Other IDs
- R01HL037951
- Status last verified
- Apr 2020
- First submitted
- 25 May 2000
- Last updated
- 7 Apr 2020
- Results posted
- No
Publications
Garnier G, Ault B, Kramer M, Colten HR. cis and trans elements differ among mouse strains with high and low extrahepatic complement factor B gene expression. J Exp Med. 1992 Feb 1;175(2):471-9. doi: 10.1084/jem.175.2.471.
PubMed 1370685Haviland DL, Haviland JC, Fleischer DT, Wetsel RA. Structure of the murine fifth complement component (C5) gene. A large, highly interrupted gene with a variant donor splice site and organizational homology with the third and fourth complement component genes. J Biol Chem. 1991 Jun 25;266(18):11818-25.
PubMed 1711041Haviland DL, Haviland JC, Fleischer DT, Hunt A, Wetsel RA. Complete cDNA sequence of human complement pro-C5. Evidence of truncated transcripts derived from a single copy gene. J Immunol. 1991 Jan 1;146(1):362-8.
PubMed 1984448Wetsel RA, Fleischer DT, Haviland DL. Deficiency of the murine fifth complement component (C5). A 2-base pair gene deletion in a 5'-exon. J Biol Chem. 1990 Feb 15;265(5):2435-40.
PubMed 2303408Haviland DL, Borel AC, Fleischer DT, Haviland JC, Wetsel RA. Structure, 5'-flanking sequence, and chromosome location of the human N-formyl peptide receptor gene. A single-copy gene comprised of two exons on chromosome 19q.13.3 that yields two distinct transcripts by alternative polyadenylation. Biochemistry. 1993 Apr 27;32(16):4168-74. doi: 10.1021/bi00067a003.
PubMed 7682842Troisi CL, Hollinger FB, Hoots WK, Contant C, Gill J, Ragni M, Parmley R, Sexauer C, Gomperts E, Buchanan G, et al. A multicenter study of viral hepatitis in a United States hemophilic population. Blood. 1993 Jan 15;81(2):412-8.
PubMed 7678517
Study at a glance
From the registry record, last updated by the sponsor on 7 Apr 2020. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Delta Hepatitis and Liver Disease in Hemophiliacs
- ClinicalTrials.gov ID
- NCT00005304
- Acronym / sponsor ID
- 3005
- Conditions
- Blood Disease, Hepatitis, Viral, Human, Hemophilia A, Liver Diseases
- Study type
- Observational
- Recruitment status
- Completed
- Lead sponsor
- Baylor College of MedicineUniversity, hospital or other
- Collaborators
- National Heart, Lung, and Blood Institute (NHLBI)
- Study start
- Sep 1986
- Study completion
- Sep 1991
- First posted
- 26 May 2000 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
To determine the prevalence of hepatitis delta virus (HDV) in a large cohort of hemophiliacs and to elucidate the role of HDV in the development and progression of liver disease in this population.
Detailed description
BACKGROUND:
Patients with classical hemophilia (hemophilia A) and Christmas disease (hemophilia B) were exposed to many hepatotropic viruses during the course of their therapy. Severe chronic hepatitis among these patients was most likely related to persistent infection with non-A,non-B hepatitis virus, hepatitis B virus, or delta hepatitis virus, a defective RNA virus which is dependent upon coinfection with HBV for essential helper functions. Carriers of HBV could contract an acute delta hepatitis infection that was invariably more severe than the illness caused by HBV alone. The morbidity and mortality of delta hepatitis infection was remarkably high. Transmission of the delta hepatitis agent appeared to follow the same routes of transmission as HBV. Direct parenteral inoculation was the classic mode of transmission of HBV which suggested a similar mode of transmission for delta hepatitis.
Hemophiliacs treated with commercial concentrates of coagulation factors prepared from pools of plasma were at great risk to contract delta hepatitis infection. About 50 percent of these patients had delta hepatitis virus antibodies. Also, studies of small cohorts indicated that hepatitis delta infection was a major cause of chronic liver disease and cirrhosis. Therefore, there was a critical need to evaluate the frequency and effect of hepatitis delta infection in hemophiliacs in order to obtain data on the natural history of chronic liver disease, comparing those with presumed chronic non-A,non-B hepatitis B alone, and combined chronic delta and HBV infections.
This grant was awarded in response to a Request for Applications issued in 1986 on the Prevalence and Consequences of Hepatitis Delta Infection in Hemophiliacs. The concept for the initiative originated in the Blood Resources Working Group of the Blood Diseases and Resources Advisory Committee and was approved by the National Heart, Lung, and Blood Advisory Council in February 1985.
DESIGN NARRATIVE:
Both a prevalence study and a longitudinal study were conducted at several centers. In the prevalence study, active hepatitis delta viral infection was established by non-invasive serologic techniques such as hepatitis delta virus RNA/cDNA probes to detect hepatitis delta virus RNA and an immunoblotting method to detect hepatitis delta antigen. These tests avoided the need for liver biopsies to verify infection. In the longitudinal study, patients were assigned to a core or auxiliary groups with those in the core group sampled every six months for biochemical evidence of liver disease and those in the auxiliary group once a year. Serogroups 0,3,5, and 6 and other participants with evidence of delta hepatitis infection were assigned to the core group. Those patients who were immune to hepatitis B virus but were anti-hepatitis delta virus positive were assigned two controls, matched by center, age, sex, and hemophilia diagnosis and severity, from serogroups 5 who were without evidence of hepatitis delta virus infection. Thus, the role of delta virus infection in liver disease in hepatitis delta virus immune patients was evaluated. Follow-up continued for four years.
Study design
Who may qualify
- Ages
- Up to 100 years
- Sex
- Male only
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Not reported in the source record.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 7 Apr 2020.
- Background: PubMed 1370685Garnier G, Ault B, Kramer M, Colten HR. cis and trans elements differ among mouse strains with high and low extrahepatic complement factor B gene expression. J Exp Med. 1992 Feb 1;175(2):471-9. doi: 10.1084/jem.175.2.471.
- Background: PubMed 1711041Haviland DL, Haviland JC, Fleischer DT, Wetsel RA. Structure of the murine fifth complement component (C5) gene. A large, highly interrupted gene with a variant donor splice site and organizational homology with the third and fourth complement component genes. J Biol Chem. 1991 Jun 25;266(18):11818-25.
- Background: PubMed 1984448Haviland DL, Haviland JC, Fleischer DT, Hunt A, Wetsel RA. Complete cDNA sequence of human complement pro-C5. Evidence of truncated transcripts derived from a single copy gene. J Immunol. 1991 Jan 1;146(1):362-8.
- Background: PubMed 2303408Wetsel RA, Fleischer DT, Haviland DL. Deficiency of the murine fifth complement component (C5). A 2-base pair gene deletion in a 5'-exon. J Biol Chem. 1990 Feb 15;265(5):2435-40.
- Background: PubMed 7682842Haviland DL, Borel AC, Fleischer DT, Haviland JC, Wetsel RA. Structure, 5'-flanking sequence, and chromosome location of the human N-formyl peptide receptor gene. A single-copy gene comprised of two exons on chromosome 19q.13.3 that yields two distinct transcripts by alternative polyadenylation. Biochemistry. 1993 Apr 27;32(16):4168-74. doi: 10.1021/bi00067a003.
- Background: PubMed 7678517Troisi CL, Hollinger FB, Hoots WK, Contant C, Gill J, Ragni M, Parmley R, Sexauer C, Gomperts E, Buchanan G, et al. A multicenter study of viral hepatitis in a United States hemophilic population. Blood. 1993 Jan 15;81(2):412-8.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
Questions about this trial
What is this clinical trial studying?
An observational study of Blood Disease and Hepatitis, Viral, Human, run by Baylor College of Medicine.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 7 Apr 2020. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00005304, which also lists 6 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 7 Apr 2020.