Alpha-1 Carrier Genomics Study

May 20, 2019 updated by: Medical University of South Carolina
The goal of this study is to better understand why some Alpha-1 genotype MZ (PiMZ) individuals develop chronic obstructive pulmonary disease (COPD) while others do not. This study will examine portions of the Alpha-1 gene that are not routinely tested to determine whether other changes in this gene correlate with development and progression of COPD. Participation involves responding to questionnaires about lung health and history, and performing an at-home finger stick to obtain blood spots using a test kit that is mailed. The blood provided will be used for genetic testing and correlation of results with COPD history. Participants will receive their results and access to genetic counseling at the conclusion of the study.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Alpha-1 Antitrypsin Deficiency (AATD, Alpha-1) is the best established genetic risk factor for chronic obstructive pulmonary disease (COPD) and liver disease. Clinical presentation is heterogeneous in most genotypic populations of alpha-1 antitrypsin deficiency (AATD) and genetic variation in the Alpha-1 gene has been incompletely studied. Rare gene alterations that predispose to COPD risks of classic AATD in individuals without a classic homozygous deficiency genotype have not been studied and are important in understanding, testing and treating at-risk populations. Investigators hypothesize that SERPINA1 gene sequencing will find important sequence variations in previously assessed MZ individuals who have COPD compared to age, race, sex, AAT level and smoking status matched MZ individuals who do not have COPD.

The Alpha-1 Carrier Genomics study is a pilot study that will enroll up to 150 MZ individuals. COPD+ and COPD- individuals will be matched on age, sex, race and smoking history. Presence and severity of COPD is assessed by a COPD severity score on questionnaires. Participants will be mailed a test kit to obtain and return a blood sample by finger stick for the purpose of SERPINA1 gene sequencing. Gene sequencing will identify, if present, genomic signatures that may correlate with COPD in this cohort. Participants will receive their results and access to genetic counseling at the conclusion of this study.

Study Type

Observational

Enrollment (Actual)

117

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

  • United States
    • South Carolina
      • Charleston, South Carolina, United States, 29425
        • Medical University of South Carolina. Division of Pulmonary and Critical Care Medicine

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Individuals age 18 and over who have previously had testing for Alpha-1 antitrypsin deficiency with genotype MZ (PiMZ) results, and an alpha-1 antitrypsin level of less than 16.0uM (83mg/dL) are eligible to participate.

Description

Inclusion Criteria:

  1. Signed informed consent
  2. PiMZ individuals who fall into the lower quartile of AAT levels.

Exclusion Criteria:

  1. Age <18 years
  2. Known homozygous or compound heterozygous classic severe AATD (e.g. PiSZ, ZZ, Znull)

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-Control
  • Time Perspectives: Cross-Sectional

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
MZ heterozygote with symptoms of COPD
Individuals who have previously had testing for Alpha-1 antitrypsin deficiency with genotype MZ (PiMZ) results. Individuals in this cohort have symptoms or clinical diagnosis of COPD.
Genetic: Genetic Sequencing
Sequencing of the SERPINA1 gene
MZ heterozygote without symptoms of COPD
Individuals who have previously had testing for Alpha-1 antitrypsin deficiency with genotype MZ (PiMZ) results. Individuals in this cohort do not have symptoms or clinical diagnosis of COPD.
Genetic: Genetic Sequencing
Sequencing of the SERPINA1 gene

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Number of Participants With Abnormal Sequences in SERPINA1 Genes
Time Frame: End of study NGS Result
Additional SERPINA1 variant of known or possible significance detected by next generation sequencing.
End of study NGS Result

Collaborators and Investigators

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

Sponsor

Medical University of South Carolina

Collaborators

CSL Behring

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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 (Actual)

February 1, 2015

Primary Completion (Actual)

April 1, 2017

Study Completion (Actual)

April 1, 2017

Study Registration Dates

First Submitted

June 20, 2016

First Submitted That Met QC Criteria

June 21, 2016

First Posted (Estimate)

June 22, 2016

Study Record Updates

Last Update Posted (Actual)

July 22, 2019

Last Update Submitted That Met QC Criteria

May 20, 2019

Last Verified

May 1, 2019

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Pro00036911

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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