Blood Vessel Function in Adolescents and Women With Polycystic Ovary Syndrome
|ClinicalTrials.gov Identifier: NCT01615562|
Recruitment Status : Terminated (Difficulty in enrolling suitable subjects)
First Posted : June 8, 2012
Last Update Posted : December 14, 2015
|First Submitted Date||June 6, 2012|
|First Posted Date||June 8, 2012|
|Last Update Posted Date||December 14, 2015|
|Start Date||December 2011|
|Primary Completion Date||April 2014 (Final data collection date for primary outcome measure)|
|Current Primary Outcome Measures
||Peripheral vascular imaging via ultrasonography during brachial artery flow-mediated vasodilation (FMD) [ Time Frame: ~ 30 minutes ]
A blood pressure cuff is placed on right forearm. A 7-12MHz linear array ultrasound transducer is placed on upper arm. 2-D and Doppler images are acquired. Forearm cuff is inflated to ~ 50 mmHg above resting systolic blood pressure (max 300 mmHg) for 4.5 minutes, then deflated. Blood flow velocity via Doppler is recorded for 15 seconds; 2D-images of the brachial artery are collected for 3 minutes. Brachial artery diameter is measured at end diastole (R-wave on ECG).FMD is determined: %FMD=(LDp-LDb)/LDbx100, where LDp=luminal diameter after inflation and LDb=luminal diameter at baseline
|Original Primary Outcome Measures||Same as current|
|Change History||Complete list of historical versions of study NCT01615562 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures
||FMD with non-endothelial dependent (NED) vessel dilation [ Time Frame: ~30 minutes ]
NED testing will be performed following a rest period of at least 15 minutes from completion of the FMD testing. For NED testing, a second baseline and 2D image and Doppler signal will be performed as previously outlined. Following repeat baseline imaging, 400 μg of nitroglycerin will be administered sublingually, and images will be recorded for at least 3 minutes following the administration of nitroglycerin. Only adult subjects will undergo NED.
|Original Secondary Outcome Measures||Same as current|
|Current Other Outcome Measures||Not Provided|
|Original Other Outcome Measures||Not Provided|
|Brief Title||Blood Vessel Function in Adolescents and Women With Polycystic Ovary Syndrome|
|Official Title||Endothelial Dysfunction in Adolescents and Women With Polycystic Ovary Syndrome (PCOS)|
|Brief Summary||The purpose of this study is to determine if changes in blood vessel health lead to the menstrual irregularities that women with PCOS experience. This research study will help determine if women with PCOS have early changes in their blood vessels called "endothelial dysfunction," and if the number of progenitor cells (cells that in a healthy person repair blood vessel damage) are related to these blood vessel changes. To do so, we will compare ultrasound (soundwave) pictures of a large blood vessel in the arm and the results of blood tests between women with PCOS and other healthy women with normal menstrual periods.|
Although adult women with PCOS demonstrate evidence of endothelial dysfunction, little is known regarding alterations in the number of pro-inflammatory monocytes, CEC, CPC, and ECFC (endothelial injury/repair profile) among affected women. For many women, the clinical manifestations of PCOS emerge during adolescence. Based on studies documenting the increased prevalence of MetS and inflammatory markers in adolescent girls with PCOS, and non-invasive studies documenting the presence of endothelial dysfunction in children with traditional cardiovascular risk factors, it is likely adolescent girls with PCOS already manifest evidence of early vascular dysfunction, which may in turn impair follicular development and contribute to the development of infertility.
Consequently, we hypothesize that perturbations in the balance between circulating inflammatory and progenitor cells contribute to the endothelial dysfunction observed in adult women with PCOS. Specifically, we anticipate that PCOS women will manifest greater evidence of vascular injury (increased numbers of inflammatory monocytes, CEC, and ECFC) and impaired endothelial repair (decreased levels of CPC) compared with control women. Moreover, we propose that, in adolescent girls with PCOS, endothelial dysfunction and corresponding alterations in the endothelial injury/repair profile are already present.
Specific Aim 1: Determine if the endothelial injury/repair profile (inflammatory monocytes, CEC, CPC, and ECFC) assessed by flow cytometry (PFC) and endothelial function (assessed by flow-mediated vasodilation (FMD) of the brachial artery) are altered in treatment-naïve adult (18-40 years of age) women with PCOS (n=15) compared with age and body mass index (BMI)-matched control women (n=15).
Specific Aim 2: Determine if the endothelial injury/repair profile assessed by PFC, AGE levels, and endothelial function (assessed by FMD of the brachial artery) are altered in treatment-naïve adolescents (14-17 years of age) with PCOS (n=15) compared with age and BMI-Z-score-matched control girls (n=15).
Specific Aim 3: Determine if observed alterations in the endothelial injury/repair profile (pro-inflammatory monocytes, CEC, CPC and ECFC) or levels of AGE correlate with endothelial function (assessed by FMD of the brachial artery) in adolescent and adult women with (n=30) and without PCOS (n=30), and whether androgens, insulin resistance, or other cardiovascular risk factors influence these relationships.
This is a cross-sectional study design involving 30 post-menarchal adolescents and 30 adult female subjects. Specifically, the adolescent population will include 15 treatment-naïve adolescent females (ages 14-17 years) with PCOS and 15 age- and BMI-percentile-matched control adolescent subjects. Similarly, the adult study population will include 15 treatment-naïve adult females (ages 18-40 years) with PCOS and 15 age- and BMI-matched control women. All study procedures will be conducted at the Clinical Research Services Unit (CRSU) at Virginia Commonwealth University (VCU) during a single visit (~3.5 hrs).
Subjects will be admitted to the CRSU after a 12-hour overnight fast. Subjects will also be instructed to refrain from vigorous physical activity for 24 hours prior to the visit. All participants will undergo a detailed medical history (including a menstrual history) and a complete physical examination (including assessments of Tanner Staging for breast and pubic hair development). Hirsutism will be assessed using the modified Ferriman-Gallwey scoring system.
At the study visit, the following anthropometric measurements with be performed on all subjects:
At the study visit a resting electrocardiogram (ECG) will be obtained for all subjects.
At the study visit, the following labs will be obtained on all subjects:
All subjects will undergo measurement of brachial artery flow-mediated vasodilation (FMD). FMD testing will be performed by the PI or Co-Investigator in the CRSU Peripheral Vascular Lab with the assistance of a trained technician using an ultrasound peripheral vascular imaging system. Adult subjects only will also undergo brachial artery reactivity testing for the assessment of non-endothelial dependent (NED) vessel dilation following the administration of nitroglycerin. NED testing will be performed following a rest period of at least 15 minutes from completion of the FMD testing. 400 μg of nitroglycerin will be administered sublingually, and images will be recorded for at least 3 minutes following the administration of nitroglycerin.
Following the FMD testing (allow 30 minute interval), all subjects are to undergo a 2-hour 75 g oral glucose tolerance test.
• Samples collected at baseline (-15 and 0) and 30 minute intervals for glucose, insulin
|Study Design||Observational Model: Case Control
Time Perspective: Cross-Sectional
|Target Follow-Up Duration||Not Provided|
|Biospecimen||Retention: Samples Without DNA
serum and plasma for analysis of hormones
|Sampling Method||Non-Probability Sample|
|Study Population||Specifically the study will enroll: 15 treatment-naïve adolescents with PCOS; 15 age- and BMI Z-score matched adolescent controls without PCOS; 15 adult treatment-naïve women with PCOS; and 15 age- and BMI-matched adult women without PCOS. Subject race/ethnicity is not a specific inclusion/exclusion criterion for this study.|
|Condition||Polycystic Ovary Syndrome (PCOS)|
|Publications *||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Completion Date||July 2015|
|Primary Completion Date||April 2014 (Final data collection date for primary outcome measure)|
|Ages||14 Years to 40 Years (Child, Adult)|
|Accepts Healthy Volunteers||Yes|
|Contacts||Contact information is only displayed when the study is recruiting subjects|
|Listed Location Countries||United States|
|Removed Location Countries|
|Other Study ID Numbers||U54HD034449- Wickham Pilot
U54HD034449 ( U.S. NIH Grant/Contract )
|Has Data Monitoring Committee||Yes|
|U.S. FDA-regulated Product||Not Provided|
|IPD Sharing Statement||Not Provided|
|Responsible Party||Virginia Commonwealth University|
|Study Sponsor||Virginia Commonwealth University|
|Collaborators||Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)|
|PRS Account||Virginia Commonwealth University|
|Verification Date||December 2015|