Genetic Analysis of Hereditary Non-Syndromic Oral Clefts

March 12, 2020 updated by: National Human Genome Research Institute (NHGRI)
In a collaborative effort with the IBN AL-NAFEES Hospital (Damascus, Syrian Arab Republic), individuals from multiplex families determined to have hereditary oral clefts will be studied. The purpose of this study is to identify the gene(s) involved in heritable oral clefts by linkage analysis and gene mapping strategies. Characterization of genes involved in inherited oral clefts could provide important insight into the inheritance and pathogenesis of this disease.

Study Overview

Status

Completed

Conditions

Detailed Description

In a collaborative effort with the IBN AL-NAFEES Hospital (Damascus, Syrian Arab Republic), individuals from multiplex families determined to have hereditary oral clefts will be studied. Healthy Syrian individuals with no family history of oral clefts will also be enrolled as a comparison group. The purpose of this study is to identify the gene(s) involved in heritable oral clefts by linkage analysis and gene mapping strategies. Characterization of genes involved in inherited oral clefts could provide important insight into the inheritance and pathogenesis of this disease. All families are enrolled into the study by our Syrian collaborators (under Ethics Board approval from the IBN AL-NAFEES Hospital) and only coded phenotype data and coded biospecimens are ever received at the NIH.

Study Type

Observational

Enrollment (Actual)

690

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

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

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

individuals with unilateral or bilateral cleft lip with or without cleft palate and their unaffected relatives@@@

Description

  • INCLUSION CRITERIA:

Enrollment in this study will be limited to individuals with non-syndromic unilateral or bilateral cleft lip with or without cleft palate and their unaffected relatives, from families which meet the following criteria:

  1. A cluster of 2 or more affected first degree relatives, such as a parent and two offspring or 2 siblings, or
  2. The occurrence of oral clefts in each of 2 generations in either the proband's paternal or maternal lineages.
  3. The occurrence of oral clefts in 2 or more cousins (up to second cousins)

The subject population is comprised of probands and their families previously examined at the IBN-AL NAFEES Hospital or at other hospitals and clinics in the Syrian Arab Republic as well

as healthy controls from the same population. Consent documents are in Arabic language for non-English-speaking subjects

EXCLUSION CRITERIA:

Individuals unable to provide consent, except for cases who are children and mentally impaired persons with consenting parents or guardians.

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: Family-Based
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Control
healthy individuals with no history of oral cleftsto serve as controls
Oral Cleft Family Members
individuals with unilateral or bilateral cleft lip with or without cleft palate and their unaffected relatives

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Identification of genetic risk variants for oral clefts
Time Frame: Ongoing
To identify and characterize genes responsible for non- syndromic and syndromic oral clefts by genetic family studies including linkage analysis, association analysis, positional cloning, evaluation of candidate genes, and eventual evaluation of mutations in identified genes.
Ongoing

Collaborators and Investigators

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

Sponsor

National Human Genome Research Institute (NHGRI)

Investigators

  • Principal Investigator: Joan Bailey-Wilson, Ph.D., National Human Genome Research Institute (NHGRI)

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)

August 31, 1997

Primary Completion (Actual)

March 12, 2020

Study Completion (Actual)

March 12, 2020

Study Registration Dates

First Submitted

June 19, 2006

First Submitted That Met QC Criteria

June 19, 2006

First Posted (Estimate)

June 21, 2006

Study Record Updates

Last Update Posted (Actual)

March 13, 2020

Last Update Submitted That Met QC Criteria

March 12, 2020

Last Verified

March 1, 2020

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 999997035
  • OH97-HG-N035

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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