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Type 1 DiabetesWBH001NCT04730882

Effect of Postprandial Hyperglycemia on Vasculature in Type 1 Diabetes and Healthy Adults

An observational study of Type 1 Diabetes and Hyperglycemia, Postprandial, run by University of Virginia at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

To the investigator's knowledge, there are no data available in the current literature regarding the acute effects of postprandial hyperglycemia and insulin timing on myocardial perfusion in people with type 1 diabetes (T1D). Read more about this study

Who is it for?
Ages 18 to 35 yearsHealthy volunteers can take part
Conditions the study is for
Type 1 Diabetes, Hyperglycemia, Postprandial
What is being tested?
Mixed Meal
How many people
36 participants
Where
1 siteUnited States
Study dates
6 Apr 2021to 18 Oct 2024
Phase
Observational
Are there results?
None posted in the registry

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 18 to 35 years
  • All sexes
  • Healthy volunteers accepted
  • Adult

Study population: 17 Healthy controls and 17 participants with T1D

Who may be able to join

  • Healthy with no chronic illness
  • Age 18-35 years
  • BMI ≤ 30 (wt kg/ht m2)
  • Normal screening labs or no clinically significant values
  • T1D participants must have T1D based on WHO diagnostic criteria for > 1 year
  • A fasting plasma glucose level >126 mg/dl (7.0 mmol/l)
Show all 9Show fewer
  • A casual plasma glucose >200 mg/dl (11.1 mmol/l)
  • In the absence of unequivocal hyperglycemia, the diagnosis must be confirmed on a subsequent day.
  • Subjects using sensor-augmented insulin pump therapy and/or artificial pancreas (closed loop system) will be included

Who cannot join

  • • Smoking presently or have quit < 2 years.
  • BP >140/90 mmHg
  • BMI >30 (wt kg/ht m2)
  • Pulse oximetry <90%
  • Elevated LDL cholesterol > 160 mg/dl
  • HbA1c ≥ 9 %
Show all 13Show fewer
  • Use of statins, calcium channel blocker, ACE, ARB, nitrates, alpha-beta blockers or diuretics
  • History of cardiac, cerebrovascular, gastrointestinal, liver, renal decease or cancer
  • Presence of an intracardiac or intrapulmonary shunt (we will screen for this by auscultation during the physical exam by PI).
  • Retinopathy (beyond mild non proliferative retinopathy)
  • Urine albumin/creatinine ratio > 300 mg per g
  • Pregnant or breastfeeding.
  • Known hypersensitivity to perflutren (contained in Definity

Trial locations and contacts

1 site in 1 country.

United States1 site
  • University of Virginia

    Charlottesville, Virginia, 22906

Other trials in United States

About this study

To the investigator's knowledge, there are no data available in the current literature regarding the acute effects of postprandial hyperglycemia and insulin timing on myocardial perfusion in people with type 1 diabetes (T1D). Observational studies using CEU in type 2 diabetes demonstrate that postprandial hyperglycemia determines myocardial perfusion defects. The investigator hypothesizes that the combination of postprandial hyperglycemia and insulin increases pulse wave velocity (i.e., aortic stiffness) and myocardial vasoconstriction, thereby reducing myocardial perfusion in T1D when compared to healthy controls. Furthermore, the investigator hypothesizes in T1D that dosing insulin before meal intake will ameliorate these cardiovascular defects.

Read the detailed description

The investigator will compare 17 T1D and 17 age-, sex-, and BMI-matched healthy controls (18-35 yrs) measuring pulse wave velocity (PWV), flow-mediated dilation (FMD) and myocardial perfusion (contrast enhanced ultrasound [CEU]) before and 2 hours after ingesting a mixed meal (40% of each subject's daily estimated caloric need, with 50%, 30%, 20% from carbohydrates, fat and protein, respectively).

T1D participants will have 2 study admissions:

  1. injection of insulin 15 minutes before ingesting a mixed meal. B) injection of insulin 15 min after ingesting a mixed meal.
Being tested
Mixed Meal
Medical subject headings
Diabetes Mellitus, Type 1, Hyperglycemia

What participants receive

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

  • Mixed MealDietary supplement

    the meal will be 40% of each subject's daily estimated caloric need, with 50%, 30%, 20% from carbohydrates, fat and protein, respectively

Study groups in NCT04730882
Study groupRoleWhat they receive
Healthy ControlHealthy subjects 18-35 years of age
Receives: Dietary Supplement: Mixed Meal
Type 1 DiabetesPeople with type 1 diabetes (18-35 yrs) who have type 1 diabetes based on WHO diagnostic criteria for > 1 year
Receives: Dietary Supplement: Mixed Meal

What is being measured

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

  1. Myocardial Microvascular Perfusion (measured by contrast-enhanced ultrasound)

    Measurement of change in myocardial microvascular perfusion

    Measured: baseline and 2 hours after a meal

Secondary outcomes (8)
  1. Skeletal Muscle Microvascular Perfusion (measured by contrast-enhanced ultrasound)

    Measurement of change in microvascular perfusion of skeletal muscle

    Measured: baseline and 2 hours after a meal

  2. Flow Mediated Dilation

    Vascular measure of change in conduit artery stiffness

    Measured: baseline and 2 hours after a meal

  3. Pulse Wave Velocity ( PWV)

    Measurement of change in central artery stiffness

    Measured: baseline and 2 hours after a meal

  4. Tumor Necrosis Factor-Alpha (TNF-alpha)

    Inflammatory biomarker (plasma sample) specific specific to patients with type 1 diabetes

    Measured: baseline and 2 hours after a meal

  5. Interleukin 6 (IL-6)

    Inflammatory biomarker (plasma sample) specific specific to patients with type 1 diabetes

    Measured: baseline and 2 hours after a meal

  6. high sensitivity C-reactive protein (hsCRP)

    Inflammatory biomarker (plasma sample) specific specific to patients with type 1 diabetes

    Measured: baseline and 2 hours after a meal

  7. Intercellular Adhesion Molecule 1 (ICAM-1)

    Biomarker (plasma sample) of endothelial dysfunction

    Measured: baseline and 2 hours after a meal

  8. E-selectin

    Biomarker (plasma sample) of endothelial dysfunction

    Measured: baseline and 2 hours after a meal

Timeline

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

  1. First posted29 Jan 2021
  2. Study start6 Apr 2021
  3. Primary completion18 Oct 2024
  4. Study completion18 Oct 2024

Resources

More details

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

Study design
Study type
Observational
Observational model
Cohort
Time perspective
Prospective
Enrolment
36 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04730882
Sponsor's protocol ID
200216
Other IDs
KL2TR003016
Acronym
WBH001
Status last verified
Mar 2025
First submitted
25 Jan 2021
Last updated
30 Mar 2025
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No

Publications

  • Lind M, Svensson AM, Kosiborod M, Gudbjornsdottir S, Pivodic A, Wedel H, Dahlqvist S, Clements M, Rosengren A. Glycemic control and excess mortality in type 1 diabetes. N Engl J Med. 2014 Nov 20;371(21):1972-82. doi: 10.1056/NEJMoa1408214.

    PubMed 25409370
  • Lee AK, Warren B, Lee CJ, McEvoy JW, Matsushita K, Huang ES, Sharrett AR, Coresh J, Selvin E. The Association of Severe Hypoglycemia With Incident Cardiovascular Events and Mortality in Adults With Type 2 Diabetes. Diabetes Care. 2018 Jan;41(1):104-111. doi: 10.2337/dc17-1669. Epub 2017 Nov 10.

    PubMed 29127240
  • Goto A, Goto M, Terauchi Y, Yamaguchi N, Noda M. Association Between Severe Hypoglycemia and Cardiovascular Disease Risk in Japanese Patients With Type 2 Diabetes. J Am Heart Assoc. 2016 Mar 9;5(3):e002875. doi: 10.1161/JAHA.115.002875.

    PubMed 26961698
  • Aryangat AV, Gerich JE. Type 2 diabetes: postprandial hyperglycemia and increased cardiovascular risk. Vasc Health Risk Manag. 2010 Mar 24;6:145-55. doi: 10.2147/vhrm.s8216.

    PubMed 20448799
  • Ceriello A, Hanefeld M, Leiter L, Monnier L, Moses A, Owens D, Tajima N, Tuomilehto J. Postprandial glucose regulation and diabetic complications. Arch Intern Med. 2004 Oct 25;164(19):2090-5. doi: 10.1001/archinte.164.19.2090.

    PubMed 15505121
  • Cavalot F, Petrelli A, Traversa M, Bonomo K, Fiora E, Conti M, Anfossi G, Costa G, Trovati M. Postprandial blood glucose is a stronger predictor of cardiovascular events than fasting blood glucose in type 2 diabetes mellitus, particularly in women: lessons from the San Luigi Gonzaga Diabetes Study. J Clin Endocrinol Metab. 2006 Mar;91(3):813-9. doi: 10.1210/jc.2005-1005. Epub 2005 Dec 13.

    PubMed 16352690
  • Livingstone SJ, Looker HC, Hothersall EJ, Wild SH, Lindsay RS, Chalmers J, Cleland S, Leese GP, McKnight J, Morris AD, Pearson DW, Peden NR, Petrie JR, Philip S, Sattar N, Sullivan F, Colhoun HM. Risk of cardiovascular disease and total mortality in adults with type 1 diabetes: Scottish registry linkage study. PLoS Med. 2012;9(10):e1001321. doi: 10.1371/journal.pmed.1001321. Epub 2012 Oct 2.

    PubMed 23055834
  • Action to Control Cardiovascular Risk in Diabetes Study Group; Gerstein HC, Miller ME, Byington RP, Goff DC Jr, Bigger JT, Buse JB, Cushman WC, Genuth S, Ismail-Beigi F, Grimm RH Jr, Probstfield JL, Simons-Morton DG, Friedewald WT. Effects of intensive glucose lowering in type 2 diabetes. N Engl J Med. 2008 Jun 12;358(24):2545-59. doi: 10.1056/NEJMoa0802743. Epub 2008 Jun 6.

    PubMed 18539917
  • Currie CJ, Peters JR, Tynan A, Evans M, Heine RJ, Bracco OL, Zagar T, Poole CD. Survival as a function of HbA(1c) in people with type 2 diabetes: a retrospective cohort study. Lancet. 2010 Feb 6;375(9713):481-9. doi: 10.1016/S0140-6736(09)61969-3. Epub 2010 Jan 26.

    PubMed 20110121
  • Saisho Y. Glycemic variability and oxidative stress: a link between diabetes and cardiovascular disease? Int J Mol Sci. 2014 Oct 13;15(10):18381-406. doi: 10.3390/ijms151018381.

    PubMed 25314300
  • Risso A, Mercuri F, Quagliaro L, Damante G, Ceriello A. Intermittent high glucose enhances apoptosis in human umbilical vein endothelial cells in culture. Am J Physiol Endocrinol Metab. 2001 Nov;281(5):E924-30. doi: 10.1152/ajpendo.2001.281.5.E924.

    PubMed 11595647
  • Quagliaro L, Piconi L, Assaloni R, Martinelli L, Motz E, Ceriello A. Intermittent high glucose enhances apoptosis related to oxidative stress in human umbilical vein endothelial cells: the role of protein kinase C and NAD(P)H-oxidase activation. Diabetes. 2003 Nov;52(11):2795-804. doi: 10.2337/diabetes.52.11.2795.

    PubMed 14578299
  • Piconi L, Quagliaro L, Assaloni R, Da Ros R, Maier A, Zuodar G, Ceriello A. Constant and intermittent high glucose enhances endothelial cell apoptosis through mitochondrial superoxide overproduction. Diabetes Metab Res Rev. 2006 May-Jun;22(3):198-203. doi: 10.1002/dmrr.613.

    PubMed 16453381
  • Horvath EM, Benko R, Kiss L, Muranyi M, Pek T, Fekete K, Barany T, Somlai A, Csordas A, Szabo C. Rapid 'glycaemic swings' induce nitrosative stress, activate poly(ADP-ribose) polymerase and impair endothelial function in a rat model of diabetes mellitus. Diabetologia. 2009 May;52(5):952-61. doi: 10.1007/s00125-009-1304-0. Epub 2009 Mar 5.

    PubMed 19263033
  • Ceriello A, Esposito K, Piconi L, Ihnat MA, Thorpe JE, Testa R, Boemi M, Giugliano D. Oscillating glucose is more deleterious to endothelial function and oxidative stress than mean glucose in normal and type 2 diabetic patients. Diabetes. 2008 May;57(5):1349-54. doi: 10.2337/db08-0063. Epub 2008 Feb 25.

    PubMed 18299315

Questions about this trial

What is this clinical trial studying?

An observational study of Type 1 Diabetes and Hyperglycemia, Postprandial, run by University of Virginia 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 9 inclusion and 13 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: finished, as of the sponsor's last update on 30 Mar 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?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

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?

Myocardial Microvascular Perfusion (measured by contrast-enhanced ultrasound) (time frame: baseline and 2 hours after a meal). 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 NCT04730882, which also lists 73 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 30 Mar 2025.

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