AzTrials
AzTrials

Lung DiseasesNCT00005531

Genetic Epidemiology of Sarcoidosis

An observational study of Lung Diseases and Sarcoidosis, run by National Heart, Lung, and Blood Institute (NHLBI).

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

To determine if hereditary susceptibility predisposes African Americans to sarcoidosis and to identify sarcoidosis susceptibility genes in African Americans. Read more about this study

Who is it for?
Ages Up to 100 years, men only
Conditions the study is for
Lung Diseases, Sarcoidosis
How many people
Not given
Where
No sites listed yet
Study dates
Dec 1996to Nov 2000
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 if hereditary susceptibility predisposes African Americans to sarcoidosis and to identify sarcoidosis susceptibility genes in African Americans.

Read the detailed description

BACKGROUND:

Sarcoidosis is a multisystem, granulomatous inflammatory disease of unknown etiology. Hereditary susceptibility to sarcoidosis is suggested by reports of familial clustering and a higher prevalence in certain ethnic groups, particularly African-Americans. Over four hundred kindreds been reported in the medical literature and these investigators have recently described 101 families and shown that African Americans have a higher prevalence rate of familial sarcoidosis than Caucasians (19 percent vs. 5 percent). The reasons why sarcoidosis clusters in families or the role of genetic factors in this disease are not known.

DESIGN NARRATIVE:

The study was carried out in African American families ascertained through 400 African American sarcoidosis patients evaluated at the Henry Ford Health System. They were tested for association of sarcoidosis with markers for candidate genes using the affected family-based control method and tested for possible environmental risk factors and genetic mechanisms of disease transmission by performing a segregation analysis in African American families.

A strong association of one or more of the candidate genes with sarcoidosis or an indication of major gene segregation for the disease, provided the basis for future linkage studies. Investigating the hereditary susceptibility of sarcoidosis was best done in African Americans, because of the greater severity and occurrence of disease in this population. Once the reasons for familial aggregation of sarcoidosis are determined, the etiology of this disease will be better understood and it should be possible to design new approaches to prevention and treatment.

The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) recor

Medical subject headings
Lung Diseases, Sarcoidosis

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted26 May 2000 (estimated)
  2. Study startDec 1996
  3. Study completionNov 2000

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
IDs, dates and publications
ClinicalTrials.gov ID
NCT00005531
Sponsor's protocol ID
5064
Other IDs
R01HL054306
Status last verified
Aug 2004
First submitted
25 May 2000
Last updated
18 Feb 2016
Results posted
No

Publications

  • Rybicki BA, Maliarik MJ, Bock CH, Elston RC, Baughman RP, Kimani AP, Sheffer RG, Chen KM, Major M, Popovich J Jr, Iannuzzi MC. The Blau syndrome gene is not a major risk factor for sarcoidosis. Sarcoidosis Vasc Diffuse Lung Dis. 1999 Sep;16(2):203-8.

    PubMed 10560124
  • Rybicki BA, Maliarik MJ, Malvitz E, Sheffer RG, Major M, Popovich J Jr, Iannuzzi MC. The influence of T cell receptor and cytokine genes on sarcoidosis susceptibility in African Americans. Hum Immunol. 1999 Sep;60(9):867-74. doi: 10.1016/s0198-8859(99)00050-6.

    PubMed 10527395
  • Maliarik MJ, Rybicki BA, Malvitz E, Sheffer RG, Major M, Popovich J Jr, Iannuzzi MC. Angiotensin-converting enzyme gene polymorphism and risk of sarcoidosis. Am J Respir Crit Care Med. 1998 Nov;158(5 Pt 1):1566-70. doi: 10.1164/ajrccm.158.5.9804123.

    PubMed 9817709
  • Maliarik MJ, Chen KM, Sheffer RG, Rybicki BA, Major ML, Popovich J Jr, Iannuzzi MC. The natural resistance-associated macrophage protein gene in African Americans with sarcoidosis. Am J Respir Cell Mol Biol. 2000 Jun;22(6):672-5. doi: 10.1165/ajrcmb.22.6.3745.

    PubMed 10837363
  • Rybicki BA, Kirkey KL, Major M, Maliarik MJ, Popovich J Jr, Chase GA, Iannuzzi MC. Familial risk ratio of sarcoidosis in African-American sibs and parents. Am J Epidemiol. 2001 Jan 15;153(2):188-93. doi: 10.1093/aje/153.2.188.

    PubMed 11159165
  • Rybicki BA, Elston RC. The relationship between the sibling recurrence-risk ratio and genotype relative risk. Am J Hum Genet. 2000 Feb;66(2):593-604. doi: 10.1086/302778.

    PubMed 10677319
  • Rybicki BA, Maliarik MJ, Poisson LM, Sheffer R, Chen KM, Major M, Chase GA, Iannuzzi MC. The major histocompatibility complex gene region and sarcoidosis susceptibility in African Americans. Am J Respir Crit Care Med. 2003 Feb 1;167(3):444-9. doi: 10.1164/rccm.2112060.

    PubMed 12554629
  • Rybicki BA, Iyengar SK, Harris T, Liptak R, Elston RC, Sheffer R, Chen KM, Major M, Maliarik MJ, Iannuzzi MC. The distribution of long range admixture linkage disequilibrium in an African-American population. Hum Hered. 2002;53(4):187-96. doi: 10.1159/000066193.

    PubMed 12435883
  • Kucera GP, Rybicki BA, Kirkey KL, Coon SW, Major ML, Maliarik MJ, Iannuzzi MC. Occupational risk factors for sarcoidosis in African-American siblings. Chest. 2003 May;123(5):1527-35. doi: 10.1378/chest.123.5.1527.

    PubMed 12740270
  • Iannuzzi MC, Maliarik MJ, Poisson LM, Rybicki BA. Sarcoidosis susceptibility and resistance HLA-DQB1 alleles in African Americans. Am J Respir Crit Care Med. 2003 May 1;167(9):1225-31. doi: 10.1164/rccm.200209-1097OC. Epub 2003 Feb 13.

    PubMed 12615619

Questions about this trial

What is this clinical trial studying?

An observational study of Lung Diseases and Sarcoidosis, run by National Heart, Lung, and Blood Institute (NHLBI).

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 18 Feb 2016. 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 NCT00005531, which also lists 10 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 18 Feb 2016.

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