Study of the Prevalence of TGFBI Corneal Dystrophies

April 21, 2016 updated by: Avellino Labs USA, Inc.

Cross-Sectional Study of the Prevalence of TGFBI Corneal Dystrophies

To determine the prevalence of 5 specific corneal dystrophies in a subgroup of patients seeking refractive surgery, and to use that information to inform them and their refractive surgeons of the presence of the corneal dystrophies so that they may make safer choices when considering refractive surgery.

Study Overview

Status

Unknown

Conditions

Detailed Description

It is well established in the peer-reviewed literature that elective keratorefractive surgery is contraindicated in individuals with granular corneal dystrophy type 2 (GCD2).1,2,3,4 Although all reported cases of exacerbation of dystrophic stromal deposits have been in individuals with GCD2, it may be assumed that a similar accelerated deposition would occur in individuals with any of the TGFBI dystrophies, and thus elective keratorefractive surgery should be avoided in any individual with a TGFBI dystrophy. The commercially available Avellino Refractive Surgery Safety Test (Avellino Universal Test) offers an accurate, rapid and affordable way to screen for five corneal dystrophies associated with mutations in the TGFBI gene prior to keratorefractive surgery. These dystrophies are granular dystrophy type 1 (GCD1), GCD2, lattice corneal dystrophy type 1 (LCD1), Reis-Buckler corneal dystrophy, and Thiel- Behnke corneal dystrophy.

This is a multicenter, cross-sectional, observational study of the prevalence of TGFBI corneal dystrophies in a North American population. Patients presenting to the clinical site for an ocular examination with a refractive complaint (non-medical complaint) or for refractive surgery consultation will be asked to participate in this study. Prior to the collection of any study data, Informed Consent will be obtained.

A a serial number / bar code controlled case report form (CRF) single nucleotide variants implicated in the pathogenesis of the TGFBI corneal dystrophies. The CRF will be used to collect demographic information from the patient. Slit lamp examination of the corneas will be performed, and the presence or absence of corneal opacities, whether characteristic or not of a TGFBI dystrophy, will be documented on the CRF form.

Once all data has been collected, descriptive statistics will be computed to identify the prevalence of each of the TGFBI corneal dystrophies as defined by the genotype. Demographic data will be compared between unaffected individuals and those identified to have a coding region mutation associated with one of the five aforementioned TGFBI corneal dystrophies.

Study Type

Observational

Enrollment (Anticipated)

20000

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

16 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients presenting to the clinical site for refractive surgery consultation or routine ocular examination who are:

Description

Inclusion Criteria:

  • At least 18 years of age
  • Able and willing to provide written informed consent and sign a HIPAA form.

Exclusion Criteria:

• None

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

  • Time Perspectives: Cross-Sectional

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Prevalence of the genetic mutations in the TGFBI gene will be measured by using buccal epithelium and real time PCR-based genetic analysis.
Time Frame: One year
Descriptive statistics will be computed to identify prevalence of each of the TGFBI corneal dystrophies as defined by the genotype. Demographic data will be analyzed.
One year

Collaborators and Investigators

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

Sponsor

Avellino Labs USA, Inc.

Investigators

  • Study Director: Anthony J Aldave, MD, UCLA Stein Eye Institute

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

April 1, 2016

Primary Completion (Anticipated)

December 1, 2016

Study Completion (Anticipated)

April 1, 2017

Study Registration Dates

First Submitted

April 15, 2016

First Submitted That Met QC Criteria

April 18, 2016

First Posted (Estimate)

April 21, 2016

Study Record Updates

Last Update Posted (Estimate)

April 22, 2016

Last Update Submitted That Met QC Criteria

April 21, 2016

Last Verified

April 1, 2016

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Avel2016PS

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

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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