Clinical trials: Circadian Rhythms
Sleep Disorders
Sleep Length and Circadian Regulation in Humans
This research will examine why sleep restriction reduces the body clock's response to bright light. The results will enable the optimization of the bright light treatment of people who suffer from circadian rhythm sleep…
- Trial name
- HAM (NCT00843843)
- Testing
- Bright light box
- Where
- United States
- Volunteers
- 16 people, healthy volunteers welcome
- Sponsor
- Rush University Medical Center
Healthy
Circadian Brown Adipose Tissue Metabolism
Brown adipose tissue is poorly understood fat that can metabolize glucose in order to generate heat. Since activated brown fat has a high metabolic rate, it is of great interest as a potential target to combat obesity.
- Trial name
- NCT02285270
- Testing
- FDG PET/CT
- Where
- United States
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- University of Pennsylvania
Obesity
Daytime vs. Delayed Eating Among Obese Individuals
The randomized, cross-over design study is designed to determine how timing of eating affects weight, adiposity, energy metabolism, and gene expression.
- Trial name
- NCT03354169
- Testing
- Eating Condition, No Intervention; withdrawn before randomization
- Where
- United States
- Volunteers
- 38 people, healthy volunteers welcome
- Sponsor
- University of Pennsylvania
Phenylketonuria (PKU)
A Pilot Study on Diurnal Variation
This self-controlled, prospective, pilot study is designed to gather information regarding the diurnal variation (changes that occur each day) in the levels of plasma phenylalanine (Phe) and tyrosine in patients with…
- Trial name
- NCT01806051
- Testing
- Kuvan
- Where
- United States
- Volunteers
- 6 people, healthy volunteers welcome
- Sponsor
- Dr. Linda Randolph
Obesity
Randomized Study of Daytime vs. Delayed Eating: Effect on Weight and Metabolism
The purpose of this study is to determine if, controlling for eating and sleep timing, caloric intake, and exercise, daytime vs. delayed eating affects body mass, adiposity, and energy metabolism in healthy adults.
- Trial name
- NCT04414644
- Testing
- Eating Condition
- Where
- United States
- Volunteers
- 17 people, healthy volunteers welcome
- Sponsor
- University of Pennsylvania
Circadian Rhythm Sleep Disorders
Safety and Efficacy of VEC-162 on Circadian Rhythm in Healthy Adult Volunteers
The purpose of this study is to assess the safety and efficacy of VEC-162 compared to matching placebo on circadian phase shift and sleep parameters.
- Trial name
- NCT00490945
- Testing
- VEC-162
- Where
- 2 sites in United States
- Volunteers
- 45 people, healthy volunteers welcome
- Sponsor
- Vanda Pharmaceuticals
Sleep Disturbances
Individually Tailored Lighting System to Improve Sleep in Older Adults
In conjunction with investigators at the Cecil G. Sheps Center for Health Services Research, University of North Carolina (UNC) at Chapel Hill, we propose to develop and evaluate a low-cost, minimally obtrusive device that…
- Trial name
- NCT01855126
- Testing
- Blue light, Red light
- Where
- United States
- Volunteers
- 46 people, healthy volunteers welcome
- Sponsor
- Rensselaer Polytechnic Institute
Sleep Disorder, Shift-Work
Examination of the Effectiveness of Suvorexant in Improving Daytime Sleep in Shift Workers
The purpose of this study is to test the hypothesis that ingestion of the wake-inhibiting drug suvorexant 30 minutes prior to daytime sleep initiation in individuals working overnight shifts will significantly improve both…
- Trial name
- NCT02491788
- Testing
- Suvorexant
- Where
- United States
- Volunteers
- 19 people, healthy volunteers welcome
- Sponsor
- VA Palo Alto Health Care System
Aging, Mental Disorder
Self-Care for Dementia Caregivers
The Self-care for Dementia Caregivers Study is a behavioral health intervention that uses digital monitoring tools and motivational health coaching to help caregivers of persons with dementia engage in a regular routine of sleep…
- Conditions
- Aging, Mental Disorder, Eating, Healthy, Physical Inactivity
- Trial name
- Care2 (NCT05309577)
- Testing
- Behavioral Self-Monitoring + Motivational Interviewing
- Where
- United States
- Volunteers
- 21 people, healthy volunteers welcome
- Sponsor
- University of Pittsburgh
Shift-Work Sleep Disorder, Shift-Work Related Sleep Disturbance
Sleep and Circadian Treatments for Shift Workers
There are three components to this study: a Field Trial, a Shift Worker Survey, and Focus Groups. The Investigators will study the effectiveness, feasibility, and acceptability of an 8-h sleep intervention in older night workers…
- Trial name
- NCT03813654
- Testing
- 8-h Afternoon-Evening Sleep, 8-h Free Sleep
- Where
- United States
- Volunteers
- 33 people, healthy volunteers welcome
- Sponsor
- Brigham and Women's Hospital
PreDiabetes, Circadian Dysregulation
Morning Light Treatment to Improve Glucose Metabolism
The primary purpose of this pilot study is to test a novel head worn light device (Re-Timer®) as an intervention to improve glucose metabolism in people with prediabetes.
- Trial name
- ML (NCT03188263)
- Testing
- Bright Light, Dim Light
- Where
- United States
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- Northwestern University
Non-visual Photoreception
Investigating the Effects of Evening Light Exposure on Melatonin Suppression, Alertness and Nocturnal Sleep
The timing and quality of sleep is governed by environmental and physiologic factors. Environmental factors, especially ambient lighting can impact the circadian system and alter the timing and structure of sleep.
- Trial name
- NCT01586039
- Testing
- Visible light
- Where
- United States
- Volunteers
- 33 people, healthy volunteers welcome
- Sponsor
- Brigham and Women's Hospital
Ulcerative Colitis
The Impact of Circadian Misalignment on Colonic Barrier Homeostasis in Ulcerative Colitis
The purpose of this study is to investigate if circadian malalignment (unusual sleeping patterns), such as night shifts (sleeping during the day and being awake during the night time), worsens the inflammation of the gut.
- Trial name
- NCT05180279
- Testing
- 7-day sleep lab
- Where
- United States
- Volunteers
- 19 people, healthy volunteers welcome
- Sponsor
- Rush University Medical Center
Glaucoma
Circadian Rhythms of Aqueous Humor Dynamics in Humans
This study is designed to identify physiological, pharmacological and pathological circadian fluctuations in aqueous humor inflow and outflow, systemic blood pressure and ocular blood flow in humans.
- Trial name
- NCT00572936
- Testing
- Latanoprost, Dorzolamide, Timolol
- Where
- United States
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- University of Nebraska
Sleep Disorders, Circadian Rhythm, Cognitive Dysfunction
Feasibility Study on the Use of Redormin®500 on Day-time Cognition
Randomized, double-blind, parallel groups, placebo-controlled, baseline/run-in period of 21 days followed by trial period of 21 days, digital phenotyping (sleep, cognitive/psychological parameters and HRV).
- Trial name
- NCT05684523
- Testing
- Valerian-Hop Extract
- Where
- Switzerland
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Max Zeller Soehne AG
Non-24-Hour-Sleep-Wake Disorder
Open Label Study to Assess the Absolute Bioavailability of Tasimelteon (HETLIOZ™)
Hetlioz™ (tasimelteon) is used in the treatment of Non-24-Hour-Sleep-Wake Disorder (Non-24). Non-24 is very common in people who are totally blind because light can not reset their body clock.
- Trial name
- NCT02130999
- Testing
- tasimelteon 20 mg capsule, tasimelteon 2 mg I.V.
- Volunteers
- 14 people, healthy volunteers welcome
- Sponsor
- Vanda Pharmaceuticals
Shift-Work Sleep Disorder, Insomnia
Fire Fighter Fatigue Management Program: Operation Healthy Sleep
Firefighters work some of the most demanding schedules known under highly stressful and demanding conditions. The need to work frequent extended shifts and long work weeks leads to acute and chronic partial sleep deprivation as…
- Conditions
- Shift-Work Sleep Disorder, Insomnia, Restless Leg Syndrome, Obstructive Sleep Apnea
- Trial name
- NCT01988129
- Testing
- Sleep disorders education and screening
- Where
- United States
- Volunteers
- 1,189 people, healthy volunteers welcome
- Sponsor
- Brigham and Women's Hospital
Shift-Work Sleep Disorder
Effects of Daytime Eszopiclone Administration in Shift Workers
The purpose of this study is to test the effects of eszopiclone on daytime sleep and overnight wakefulness in shift workers.
- Trial name
- NCT00900159
- Testing
- eszopiclone
- Where
- United States
- Volunteers
- 24 people, healthy volunteers welcome
- Sponsor
- Brigham and Women's Hospital
Chromosome Disorders
Melatonin Levels in Smith Magenis Syndrome (SMS)
The goal of this pilot project is to determine whether melatonin levels are disordered in patients with Smith-Magenis Syndrome (SMS) and whether melatonin treatment can correct abnormal circadian rhythms in SMS patients.
- Trial name
- NCT00691574
- Testing
- Melatonin, Enviro-light artificial light box
- Where
- United States
- Volunteers
- 5 people, healthy volunteers welcome
- Sponsor
- Oregon Health and Science University
Hypertension, Cardiovascular Risk Factor
Sleep and Circadian Mechanisms of Non-dipping Blood Pressure
This study will be the first to distinguish the relative contributions of sleep, circadian and behavioral mechanisms to the non-dipping BP profile in Black adults and will lay the groundwork for optimizing therapies dependent on…
- Trial name
- NCT03558893
- Testing
- Forced Desynchrony
- Where
- United States
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Oregon Health and Science University