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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT00342277
Other study ID # 999999056
Secondary ID OH99-CH-N056
Status Completed
Phase
First received
Last updated
Start date December 21, 1999
Est. completion date May 5, 2016

Study information

Verified date February 2023
Source National Institutes of Health Clinical Center (CC)
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

The understanding of the biological mechanisms underlying preterm birth is very limited, making prevention of preterm birth difficult. The incidence of preterm birth worldwide varies between 6%-11% in singleton pregnancies, and 64-93% of preterm deliveries occur after the spontaneous onset of labor (preterm labor). The risk factors associated with preterm birth include demographic variables such as ethnic group, past obstetric history, and complications of the current pregnancy such as infection and fetal congenital anomalies. The current study aims to investigate the basic mechanisms of preterm labor by systematically cataloging the changes in expression levels of all expressed genes whose sequences are available. The goals will be accomplished by using microarray technology followed by subsequent confirmative or complementary analyses.


Description:

The understanding of the biological mechanisms underlying preterm birth is very limited, making prevention of preterm birth difficult. The incidence of preterm birth worldwide varies between 6%-11% in singleton pregnancies, and 64-93% of preterm deliveries occur after the spontaneous onset of labor (preterm labor). The risk factors associated with preterm birth include demographic variables such as ethnic group, past obstetric history, and complications of the current pregnancy such as infection and fetal congenital anomalies. The current study aims to investigate the basic mechanisms of preterm labor by systematically cataloging the changes in expression levels of all expressed genes whose sequences are available. The goals will be accomplished by using microarray technology followed by subsequent confirmative or complementary analyses.


Recruitment information / eligibility

Status Completed
Enrollment 6838
Est. completion date May 5, 2016
Est. primary completion date May 5, 2016
Accepts healthy volunteers No
Gender All
Age group N/A and older
Eligibility - INCLUSION CRITERIA: Consecutive patients admitted with the following diagnoses from four different ethnic groups (Hispanic, African American, Asian, and Caucasian): 1. Preterm labor with intact membranes and with 1. acute inflammation; 2. chronic villitis; 3. vascular pathology; 4. no identifiable lesions. 2. Preterm delivery without labor because of the following reasons: 1. pre-eclampsia; 2. abruptio placentae; 3. fetal anomalies; 4. Other complications (e.g. automobile accidents) that necessitate immediate delivery. 3. PROM leading to preterm delivery and with 1. acute inflammation; 2. chronic villitis; 3. vascular pathology; 4. no identifiable lesions. 4. Term delivery without labor and no identifiable lesions. 5. Term delivery in spontaneous labor and no identifiable lesions. 6. Term delivery with chorioamnionitis. 7. Term delivery with failed labor leading to ceasarean section. EXCLUSION CRITERIA: 1. Refusal of written informed consent 2. Fetal or maternal conditions mandating immediate delivery (i.e. fetal distress, significant hemorrhage, etc.)

Study Design


Related Conditions & MeSH terms


Locations

Country Name City State
Chile Sotero del Rio Hospital Puente Alto
Italy Padova Hospital Padova
Korea, Republic of Seoul National University Seoul
United States Wayne State University Detroit Michigan

Sponsors (1)

Lead Sponsor Collaborator
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

Countries where clinical trial is conducted

United States,  Chile,  Italy,  Korea, Republic of, 

Outcome

Type Measure Description Time frame Safety issue
Primary To identify genes that are up- or down-regulated in preterm delivery and preterm PROM using microarray expression profiling. Investigate the basic mechanisms of preterm labor by systematically cataloging the changes in expression levels of all expressed genes whose sequences are available. After the study is closed to accrual
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