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Type2 Diabetes MellitusNCT03647306

Behavioral Chronotype: Impact on Sleep and Metabolism

A study testing Early Total Caloric Intake, Late Total Caloric Intake and Extended Overnight Fast in people with Type2 Diabetes Mellitus and Cardiovascular Diseases, run by University of Chicago at 1 site in United States.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

The purpose of this study is to examine how the timing of eating changes how the body makes and uses energy (metabolism). This study will also examine if metabolism changes with age. Read more about this study

Who is it for?
Ages 30 to 75 yearsHealthy volunteers can take part
What is being tested?
Early Total Caloric Intake, Late Total Caloric Intake and Extended Overnight Fast
Could I receive a placebo?
No, everyone receives an active treatment
How many people
200 participants
Where
1 siteUnited States
Study dates
2 Feb 2018to 1 Jan 2027
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 30 to 75 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Healthy overweight and obese (25 kg/m2 ≤BMI< 40 kg/m2) men and women
  • aged 30-75 years
  • self-report sleeping at least 6.5-hrs/night but no more than 9-hrs/night, between 21:00 and 09:00
  • signed informed consent

Who cannot join

  • participation in a medically managed weight loss program within the past year
  • undergone bariatric surgery
  • dietary restrictions
  • Subjects will not have undergone surgery, donated a unit of blood, worked night shifts or crossed any time zones, or participated in another clinical study within a month prior to the study.
  • pregnancy in women
  • lactating women
Show all 19Show fewer
  • Female subjects must not be actively going through menopause.
  • prisoners
  • inability to consent
  • members of the study team
  • Females with a hemoglobin < 11.5g/dL, and males with a hemoglobin < 13.5 g/dl will be excluded from the study.
  • presence of a sleep disorder such as moderate or severe sleep apnea (AHI≥15), a Circadian Rhythm Sleep Disorder (DSM-V criteria for advance sleep phase syndrome, delayed sleep phase syndrome, non 24-h sleep disorder, irregular sleep disorder and shift-work related sleep disorder),
  • a diagnosis of diabetes based on history or screening tests
  • other forms of endocrine dysfunction including PCOS;
  • a history of cognitive or other neurological disorders;
  • a history of major psychiatric disorder based on DSM-V criteria,
  • the presence of unstable or serious medical conditions,
  • any GI disease that requires dietary adjustment;
  • current, or use within the past month of melatonin, psychoactive, hypnotic, stimulant or pain medications (except occasionally); beta blockers; habitual smoking (6 or more cigarettes per week); caffeine consumption of greater than 500 mg per day

Trial locations and contacts

1 site in 1 country.

United States1 site
  • University of Chicago

    Chicago, Illinois, 60637

Other trials in United States

About this study

The purpose of this study is to examine how the timing of eating changes how the body makes and uses energy (metabolism). This study will also examine if metabolism changes with age.

Read the detailed description

The timing of food intake and caloric distribution across the 24hr day are emerging as contributing factors to weight gain. The idea that not only what you eat, but when you eat can contribute to weight gain has garnered interest from both the scientific community and the public. In fact, the distribution of caloric intake over the 24hr day has been recently recognized as a potential source of "circadian misalignment" which can result in adverse health outcomes, including overeating, impaired glucose tolerance, insulin sensitivity, and cardiovascular disease risk. This study will provide proof-of-concept evidence on the impact of misalignment on glucose metabolism and blood pressure regulation. This study will focus on overweight individuals who are at high risk of obesity but are still on a trajectory that can potentially be reversed by lifestyle changes. Following a careful assessment of the subject's habitual sleep and meal timing and caloric distribution under real life conditions, a short laboratory study will determine 24hr profiles of hormones involved in circadian timing, food intake and cardiovascular risk in a session that will mimic habitual sleep/wake and caloric distribution. Participants will then be randomized to one of three groups in which caloric distribution across the day will either be equally distributed between 3 meals, or heavily weighted to the morning or heavily weighted to the evening. During a 6-day semi-ambulatory in patient intervention, combining laboratory and ambulatory procedures, study procedures will assess the effect of experimentally changing caloric distribution across the day, advancing versus delaying the dietary chronotype. After 7 days of this caloric distribution intervention, we will then repeat the short laboratory session to assess whether the intervention of caloric distribution altered any of the measured profiles. The outcome measures will be the timing of the dim light melatonin onset (DLMO), blood pressure dipping, and insulin sensitivity. The proposed work will provide unambiguous evidence related to the efficacy of a novel lifestyle intervention - that could be more acceptable than dietary restriction or exercise - to reduce the risk of T2DM and CVD in adults at risk due to age and degree of adiposity. Moreover, our project will examine both middle-aged adults and older adults. The younger age group is of interest because of a lesser burden of illness and of an opportunity to alter the trajectory of aging at an earlier stage. The older age group is expected to have more severe circadian disturbances at baseline, with the potential of a larger effect on CM risk. The combined examination of metabolic risk and CVD risk in the context of circadian function is also novel.

Being tested
Early Total Caloric Intake, Late Total Caloric Intake, Extended Overnight Fast
Keywords
peripheral circadian clock, central circadian clocks, chronotype, diet
Medical subject headings
Cardiovascular Diseases

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Early Total Caloric IntakeBehavioural

    Provide subjects a regimented amount of calories at each meal.

  • Late Total Caloric IntakeBehavioural

    Provide subjects a regimented amount of calories at each meal.

  • Extended Overnight FastBehavioural

    Provide subjects a regimented amount of calories at each meal.

Study groups in NCT03647306
Study groupRoleWhat they receive
Extended Overnight FastActive comparatorThe extended overnight fast group will have scheduled meal times for the entire 6 day semi ambulatory and in lab session. Subjects will consume approximately 33% of their daily calories at breakfast, lunch and dinner, respectively. This is a model for fasting dietary chronotype.
Receives: Behavioral: Extended Overnight Fast
Early Total Caloric IntakeExperimentalThe Early Total Caloric Intake study group will have scheduled meal times for the entire 6 day semi ambulatory and in lab session and will consume 60% of their daily calories during breakfast. The remaining 40% of daily calories will be consumed during lunch and dinner. This is a model for early dietary chronotype.
Receives: Behavioral: Early Total Caloric Intake
Late Total Caloric IntakeExperimentalThe Late Total Caloric Intake study group will have scheduled meal times for the entire 6 day semi ambulatory and in lab session and will consume 40% of daily calories during breakfast and lunch. The remaining 60% of daily calories will be consumed during dinner. This is a model for late dietary chronotype.
Receives: Behavioral: Late Total Caloric Intake

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. MI-IS

    The primary outcome measure is the Matsuda Index of Insulin Sensitivity.

    Measured: 15 days

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted27 Aug 2018
  2. Study start2 Feb 2018
  3. Primary completion13 Mar 2023
  4. Study completion1 Jan 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
200 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03647306
Sponsor's protocol ID
IRB17-1768
Other IDs
P01AG011412
Status last verified
Nov 2025
First submitted
23 Aug 2018
Last updated
14 Nov 2025
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Maury E, Hong HK, Bass J. Circadian disruption in the pathogenesis of metabolic syndrome. Diabetes Metab. 2014 Nov;40(5):338-46. doi: 10.1016/j.diabet.2013.12.005. Epub 2014 Jan 14.

    PubMed 24433933
  • Peek CB, Ramsey KM, Marcheva B, Bass J. Nutrient sensing and the circadian clock. Trends Endocrinol Metab. 2012 Jul;23(7):312-8. doi: 10.1016/j.tem.2012.02.003. Epub 2012 Mar 16.

    PubMed 22424658
  • Dibner C, Schibler U. Circadian timing of metabolism in animal models and humans. J Intern Med. 2015 May;277(5):513-27. doi: 10.1111/joim.12347. Epub 2015 Feb 6.

    PubMed 25599827
  • Arble DM, Ramsey KM, Bass J, Turek FW. Circadian disruption and metabolic disease: findings from animal models. Best Pract Res Clin Endocrinol Metab. 2010 Oct;24(5):785-800. doi: 10.1016/j.beem.2010.08.003.

    PubMed 21112026
  • Gerhart-Hines Z, Lazar MA. Circadian metabolism in the light of evolution. Endocr Rev. 2015 Jun;36(3):289-304. doi: 10.1210/er.2015-1007. Epub 2015 Apr 30.

    PubMed 25927923
  • Summa KC, Turek FW. Chronobiology and obesity: Interactions between circadian rhythms and energy regulation. Adv Nutr. 2014 May 14;5(3):312S-9S. doi: 10.3945/an.113.005132. Print 2014 May.

    PubMed 24829483
  • Scheer FA, Hilton MF, Mantzoros CS, Shea SA. Adverse metabolic and cardiovascular consequences of circadian misalignment. Proc Natl Acad Sci U S A. 2009 Mar 17;106(11):4453-8. doi: 10.1073/pnas.0808180106. Epub 2009 Mar 2.

    PubMed 19255424
  • Morris CJ, Yang JN, Garcia JI, Myers S, Bozzi I, Wang W, Buxton OM, Shea SA, Scheer FA. Endogenous circadian system and circadian misalignment impact glucose tolerance via separate mechanisms in humans. Proc Natl Acad Sci U S A. 2015 Apr 28;112(17):E2225-34. doi: 10.1073/pnas.1418955112. Epub 2015 Apr 13.

    PubMed 25870289
  • Buxton OM, Cain SW, O'Connor SP, Porter JH, Duffy JF, Wang W, Czeisler CA, Shea SA. Adverse metabolic consequences in humans of prolonged sleep restriction combined with circadian disruption. Sci Transl Med. 2012 Apr 11;4(129):129ra43. doi: 10.1126/scitranslmed.3003200.

    PubMed 22496545
  • Leproult R, Holmback U, Van Cauter E. Circadian misalignment augments markers of insulin resistance and inflammation, independently of sleep loss. Diabetes. 2014 Jun;63(6):1860-9. doi: 10.2337/db13-1546. Epub 2014 Jan 23.

    PubMed 24458353
  • McHill AW, Melanson EL, Higgins J, Connick E, Moehlman TM, Stothard ER, Wright KP Jr. Impact of circadian misalignment on energy metabolism during simulated nightshift work. Proc Natl Acad Sci U S A. 2014 Dec 2;111(48):17302-7. doi: 10.1073/pnas.1412021111. Epub 2014 Nov 17.

    PubMed 25404342
  • Morris CJ, Garcia JI, Myers S, Yang JN, Trienekens N, Scheer FA. The Human Circadian System Has a Dominating Role in Causing the Morning/Evening Difference in Diet-Induced Thermogenesis. Obesity (Silver Spring). 2015 Oct;23(10):2053-8. doi: 10.1002/oby.21189.

    PubMed 26414564
  • Morris CJ, Purvis TE, Mistretta J, Scheer FA. Effects of the Internal Circadian System and Circadian Misalignment on Glucose Tolerance in Chronic Shift Workers. J Clin Endocrinol Metab. 2016 Mar;101(3):1066-74. doi: 10.1210/jc.2015-3924. Epub 2016 Jan 15.

    PubMed 26771705
  • Grimaldi D, Carter JR, Van Cauter E, Leproult R. Adverse Impact of Sleep Restriction and Circadian Misalignment on Autonomic Function in Healthy Young Adults. Hypertension. 2016 Jul;68(1):243-50. doi: 10.1161/HYPERTENSIONAHA.115.06847. Epub 2016 Jun 6.

    PubMed 27271308
  • Gill S, Panda S. A Smartphone App Reveals Erratic Diurnal Eating Patterns in Humans that Can Be Modulated for Health Benefits. Cell Metab. 2015 Nov 3;22(5):789-98. doi: 10.1016/j.cmet.2015.09.005. Epub 2015 Sep 24.

    PubMed 26411343

Questions about this trial

What is this clinical trial studying?

A study testing Early Total Caloric Intake, Late Total Caloric Intake and Extended Overnight Fast in people with Type2 Diabetes Mellitus and Cardiovascular Diseases, run by University of Chicago at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 19 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 14 Nov 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

MI-IS (time frame: 15 days). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03647306, which also lists 17 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 14 Nov 2025; AzTrials last refreshed its copy on 31 Oct 2026.

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