Genetic and Nutritional Causes of Heart Birth Defects
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Purpose
Each year in the United States, thousands of babies are born with heart defects. Women who take folic acid during pregnancy have a lower risk of giving birth to infants with heart defects, but the reason for this remains unknown. This study will examine the relationship between genes, nutrition, and the occurrence of heart defects in infants.
| Condition |
|---|
|
Heart Defects, Congenital |
| Study Type: | Observational |
| Study Design: | Observational Model: Case Control Time Perspective: Retrospective |
| Official Title: | Gene and Nutrient Etiologies of Human Heart Defects |
Buccal cell collection
| Enrollment: | 1610 |
| Study Start Date: | July 2006 |
| Study Completion Date: | December 2006 |
Congenital heart defects are the most common type of birth defect; each year, more than 30,000 babies in the United States are born with this kind of abnormality. Conotruncal heart defects, considered to be a very serious type of defect, involve a structural abnormality in the chambers of the heart or blood vessels that lead to and from the heart. Infants born with conotruncal defects must undergo complex open heart surgery, and there is a high fatality rate. Folic acid supplementation during pregnancy has been shown to reduce the risk of conotruncal defects. However, some women who take folic acid during pregnancy still give birth to infants with conotruncal defects. Specific genes may influence the way individuals metabolize folic acid, and variations in these genes may make some infants more prone to developing heart defects. This study will examine the relationship between genes, maternal nutritional intake, and conotruncal heart defects. The results from this study may help to determine genetic and nutritional causes of congenital heart defects.
This study will use previously collected data on 550 infants born with conotruncal defects and 1060 infants born without heart defects. There will be no study visits specifically for this study. Infant DNA will be analyzed for genes that may play a role in folate metabolic pathways. Blood previously collected from the mothers during pregnancy will be analyzed for differences in nutrient intake. Specifically, levels of folic acid, choline, vitamin B12, and methionine will be examined.
Eligibility| Ages Eligible for Study: | up to 12 Months |
| Genders Eligible for Study: | Both |
| Accepts Healthy Volunteers: | Yes |
| Sampling Method: | Probability Sample |
Mothers of babies with heart defects and mothers of babies without any malformation.
Inclusion Criteria:
- Conotruncal heart defect
Exclusion Criteria:
- If part of control group, must not have heart defect
Contacts and LocationsPlease refer to this study by its ClinicalTrials.gov identifier: NCT00368732
| United States, California | |
| California Birth Defects Monitoring Program | |
| Berkeley, California, United States, 94710 | |
| Principal Investigator: | Gary M. Shaw, DrPH | California Birth Defects Monitoring Program |
More Information
Additional Information:
No publications provided
| Responsible Party: | Gary M. Shaw, DrPH, California Birth Defects Monitoring Program |
| ClinicalTrials.gov Identifier: | NCT00368732 History of Changes |
| Other Study ID Numbers: | 1352, R01 HL085859 |
| Study First Received: | August 24, 2006 |
| Last Updated: | December 17, 2007 |
| Health Authority: | United States: Federal Government |
Keywords provided by National Heart, Lung, and Blood Institute (NHLBI):
|
Congenital Heart Defects |
Additional relevant MeSH terms:
|
Heart Defects, Congenital Cardiovascular Abnormalities Cardiovascular Diseases Congenital Abnormalities Heart Diseases |
ClinicalTrials.gov processed this record on February 27, 2015