체중, 수면 및 심장 건강
비만에서 심혈관 위험의 일주기 기전
A multidisciplinary investigation examining the circadian mechanisms regulating cardiovascular (CV) risk, with an additional focus on obesity. Specifically, in a valid circadian protocol, the investigators aim to study resting cardiovascular risk markers and the reactivity of circadian rhythms in these risk markers to standardized stressors. It is intended to compare results in lean and obese individuals to determine if there are specific risks across the circadian cycle specific to obesity. Furthermore, using an exploratory approach, the investigators propose to explore impairment in pre/post synaptic function in the cardiac left ventricle.
연구 개요
상태
상세 설명
Overall, these studies will help us answer whether the circadian system predispose individuals to increased CV disease risk - particularly around the vulnerable morning period, and whether these risks differ with obesity. The results will serve as a foundation for clinical trials of appropriately timed dosing of medications targeting aspects of the CV system that increase effectiveness while decreasing side effects, and may have particular relevance to management of CV risk in people with obesity.
연구 유형
등록 (실제)
연락처 및 위치
연구 장소
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Oregon
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Portland, Oregon, 미국, 97239
- Oregon Health & Science University
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참여기준
자격 기준
공부할 수 있는 나이
건강한 자원 봉사자를 받아들입니다
연구 대상 성별
샘플링 방법
연구 인구
Community sample
설명
Inclusion Criteria:
- Ages 25-65
- Lean and overweight (BMI 18.5-40kg/m2)
- Habitually sedentary
Exclusion Criteria:
- History of smoking/tobacco use
- Insomnia
- Moderate to severe obstructive sleep apnea.
- Prior shift work within 6 months prior to the study.
- Prescription medications
- Drugs of abuse
- Acute, chronic, or debilitating medical condition (including diabetes, hypertension, and metabolic syndrome)
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
- 관찰 모델: OTHER
- 시간 관점: PROSPECTIVE
코호트 및 개입
그룹/코호트 |
개입 / 치료 |
|---|---|
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Normal Weight
Healthy lean controls [18.5<BMI<25 kg/m2 and waist circumference <94/80 cm (men/women respectively)] will participate in a 5-day circadian study protocol with numerous repeated cardiovascular measures across the circadian cycle. Drugs are used as part of physiological monitoring and not as interventions including imaging using radiopharmaceuticals (11C-meta-hydroxyephedrine, and 11C-CGP12177). |
Drugs are used for as part of physiological monitoring and not as interventions, including imaging using radiopharmaceuticals (11C-meta-hydroxyephedrine, and 11C-CGP12177).
다른 이름들:
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Overweight
Healthy obese [30≤BMI<40 and waist circumference ≥94/80 (men and women respectively)] Healthy lean controls [18.5<BMI<25 kg/m2 and waist circumference <94/80 cm (men/women respectively)] will participate in a 5-day circadian study protocol with numerous repeated cardiovascular measures across the circadian cycle. Drugs are used as part of physiological monitoring and not as interventions including imaging using radiopharmaceuticals (11C-meta-hydroxyephedrine, and 11C-CGP12177). |
Drugs are used for as part of physiological monitoring and not as interventions, including imaging using radiopharmaceuticals (11C-meta-hydroxyephedrine, and 11C-CGP12177).
다른 이름들:
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연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Blood Pressure (BP)
기간: 5 Days
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Measurements were collected up to 7 times per participant across the circadian cycle under constant conditions across 5 days. Resting BP and Exercise BP data were collected at the beginning of each of 7 wake periods in a supine position and where participants exercised at an intensity equivalent to brisk walking. Salivary melatonin was used to calculate the circadian phase marker using dim light melatonin onset (DLMO). All data were assigned a circadian phase relative to DLMO and binned into 4-hour (or 60-degree) intervals. In the statistical analysis, the weight group refers to normal or overweight, exercise condition refers to seated or exercising on the bike, and circadian phase refers to the center of the circadian bin. This is an observational study. Due to insufficient enrollment and an imbalanced group distribution, we do not have sufficient statistical power to fully interpret these data. The data are valuable as pilot data for future investigations and sample size estimation. |
5 Days
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2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Coronary Microvascular Blood Flux
기간: 3 days
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Coronary microvascular function, measured as coronary microvascular blood flux using myocardial contrast echocardiography. |
3 days
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Flow Mediated Dilation (FMD)
기간: 5 days
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FMD to measure endothelial function. |
5 days
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Heart Rate
기간: 5 Days
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Heart rate via 2-channel echocardiogram (ECG) |
5 Days
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Epinephrine
기간: 5 days
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Venous Epinephrine to estimate sympathetic output |
5 days
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Norepinephrine
기간: 5 days
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Venous Norepinephrine to estimate sympathetic output |
5 days
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Cortisol
기간: 5 days
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Saliva cortisol to estimate sympathetic output |
5 days
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기타 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Beta-adrenergic Receptor Density (Exploratory Outcome)
기간: 5 days.
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Radiolabeled agonist (11C-CGP12177) to measure beta-adrenergic receptors during PET Imaging. |
5 days.
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Norepinephrine Reuptake Transport (Exploratory Outcome)
기간: 5 days.
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Radiolabeled meta-hydroxyephedrine (11C-mHED) to measure norepinephrine reuptake during PET Imaging. |
5 days.
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공동 작업자 및 조사자
협력자
수사관
- 수석 연구원: Steven A Shea, PhD, Oregon Institute of Occupational Health Sciences
- 수석 연구원: Jeanne M Link, PhD, OHSU Center for Radiochemistry Research
연구 기록 날짜
연구 주요 날짜
연구 시작 (실제)
기본 완료 (실제)
연구 완료 (실제)
연구 등록 날짜
최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (실제)
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
추가 정보
이 연구와 관련된 용어
추가 관련 MeSH 약관
기타 연구 ID 번호
- IRB00017489
- KL2TR002370 (미국 NIH 보조금/계약)
- R01HL140577 (미국 NIH 보조금/계약)
개별 참가자 데이터(IPD) 계획
개별 참가자 데이터(IPD)를 공유할 계획입니까?
약물 및 장치 정보, 연구 문서
미국 FDA 규제 의약품 연구
미국 FDA 규제 기기 제품 연구
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