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Type 2 DiabetesPhase 4NCT02467478

Linagliptin's Effect on CD34+ Stem Cells

A Phase 4 study testing Linagliptin in people with Type 2 Diabetes and Impaired Renal Function, run by George Washington University 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

Type 2 diabetes is a national epidemic. Diabetes has undesirable effects on blood vessels which may contribute to heart disease. Endothelial Progenitor Cells (EPCs) are found in the blood. Read more about this study

Who is it for?
Ages 30 to 70 years
Conditions the study is for
Type 2 Diabetes, Impaired Renal Function
What is being tested?
Linagliptin
Type of treatment
Pill or oral medicine
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
31 participants
Where
1 siteUnited States
Study dates
Apr 2015to Dec 2019
Phase
Phase 4
Are there results?
Yes, posted in the registrySummary in the doctors' view

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 70 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Adults aged 30-70 years
  • Diagnosis of type 2 diabetes within the previous 15 years using criteria of the American Diabetes Association
  • Currently being treated with 1-2 grams/day of metformin, or insulin or both stably
  • Hemoglobin A1c (HbA1C) between 6.5% to 10.0% (both inclusive)
  • Body Mass Index (BMI) between 25 and 39.9 kg/m2 (both inclusive)
  • Chronic Kidney disease (CKD) Stages 1-3, Creatinine clearance (CrCl) less than 90 and more than 29

Who cannot join

  • Type 1 diabetes
  • History of Diabetic Ketoacidosis (DKA) or hyperosmolar nonketotic coma
  • Hemoglobinopathies with low hematocrit (Below 28 Units)
  • History of pancreatitis
  • History of cancer within the past 5 years (except basal cell carcinoma)
  • Previous cardiovascular or cerebrovascular event within 6 months of screening or active or clinically significant coronary and/or Peripheral Vascular Disease (PVD)
Show all 25Show fewer
  • Statin use started in the last 3 month
  • Current use of oral or injectable anti-diabetic medication other than Metformin and insulin
  • Consistent use of steroids within the last 3 months
  • Any active wounds, or surgery within the past 3 months
  • Inflammatory disease, or the chronic use of anti-inflammatory drugs within the past 3 months
  • Untreated hyper/hypothyroidism
  • Contraindications to moderate exercise
  • Implanted devices that might interact with the tanita scale
  • Pre-existing liver disease and/or Alanine aminotransferase (ALT) and Aspartate Aminotransferase (AST) > 2.5 times Under the Normal Limits (UNL)
  • Untreated Systolic blood pressure > 140 mmHg or diastolic blood pressure> 90 mmHg
  • Serum creatinine levels ≥ 2.0
  • CKD Stages 4 and 5 (estimated CrCl <30 mL/min)
  • Triglycerides > 450 mg/dL
  • Known allergies or hypersensitivities to Linagliptin or Dipeptidyl peptidase-4 (DDP-4) inhibitors
  • Treatment with cytochrome p450 (CYP 3A4) inhibitors
  • Women of child bearing age who are unwilling or unable to use an acceptable method to avoid pregnancy for the entire study
  • Prisoners or subjects that are involuntarily incarcerated
  • Subjects who are compulsorily detained for treatment of either a psychiatric or physical (e.g. infectious disease) illness
  • Additionally, patients who are active smokers, patients who are pregnant, nursing women, and post-menopausal women who are on hormone replacement therapy will be excluded.

Trial locations and contacts

1 site in 1 country.

United States1 site
  • The George Washington University Medical Faculty Associates

    Washington D.C., District of Columbia, 20037

Other trials in United States

About this study

Official title: Role of Linagliptin in Improving Renal Failure by Improving CD34+ Stem Cell Number, Function and Gene Expression in Renal Function Impaired Type 2 Diabetes Patients.

Type 2 diabetes is a national epidemic. Diabetes has undesirable effects on blood vessels which may contribute to heart disease. Endothelial Progenitor Cells (EPCs) are found in the blood. Research has shown that improving the survival of these special blood cells may decrease the harmful effects of diabetes on blood vessels and reduce or reverse heart disease. Linagliptin is an Food and Drug Administration (FDA) approved prescription medicine used along with insulin or with oral medications to lower blood sugar in people with Type 2 diabetes. It is in a class of diabetes medication called Dipeptidyl peptidase-4 (DPP-4) inhibitors. DPP-4 inhibitors have been shown to increase EPCs in patients with Type 2 diabetes.

Hypothesis: Both type 2 diabetes and Chronic Kidney Disease (CKD) are associated with poor stem cell number and function. Poor viability and function of EPCs in CKD and diabetes The investigators hypothesize that use of Linagliptin (along with Insulin) may help reduce cardiovascular risk by improving EPC survival and function above and beyond adequate glucose metabolism control

Read the detailed description

Type 2 diabetes is a national epidemic with significant macro and microvascular complications. Insulin resistance in pre-diabetes and overt diabetes are associated with endothelial dysfunction.

A few studies indicate that stem cells particularly EPCs can act as a suitable bio-marker for monitoring cardiovascular morbidity. In this proposal the investigators suggest that EPCs or CD34 positive cells (defined as CD34/vascular endothelial growth factor receptor 2 (VEGFR2+) cells) can act as a suitable cellular biomarker for estimating and following endothelial dysfunction in early type 2 diabetes patients with CKD. EPCs have been shown to be dysfunctional in both CKD patients and type 2 Diabetes Mellitus (DM) patients.

Linagliptin (TRADJENTA) tablets are indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus. No dose adjustment is recommended for patients with renal impairment.

EPCs have been used as a regenerative tool in ischemic myocardium and diabetic wound healing. Endothelial dysfunction with associated inflammation may be a consequence of excess intra-cellular super-oxide presence in a setting of diabetes which is a pro-oxidative stress condition ultimately leading to poor EPC function and senescence.

Though lifestyle modification has been proposed as a main stay for prevention and treatment of early type 2 diabetes, several new therapies for diabetes have been developed in recent years. Incretins and incretin mimetics appear to hold promise. Mechanism of positive effect of exercise and oral hypoglycemic agents can be very different.

DPP-4 inhibitors have been shown to increase EPCs in patients with type 2 diabetes reportedly via stromal cell-derived factor 1 (SDF-1) alpha up-regulation. Interestingly, up-regulation of SDF-1 alpha and vascular endothelial growth factor (VEGF), both chemotactic factors increase mobilization and recruitment of EPCs in the face of acute ischemic injury for repair and regeneration.

Several studies have shown positive effect of incretins (Glucagon like peptide, GLP-1) and incretin receptor agonists (GLP-1 receptor agonists) on cardiovascular risk factors in type 2 diabetes patients and even in patients with chronic heart failure and left ventricular dysfunction who do not have diabetes.

DPP-4 Inhibitors may have cardio-protective effects of their own, as they increase bio-availability of endogenous GLP-1. They improve blood flow and nitric oxide production in endothelium. These are unique properties not demonstrated by other oral diabetes medications. The mechanism underlying these effects may be mediated by increased nitric oxide bioavailability but is not completely known. However these beneficial effects appear to be independent of glycemia reduction.

It is however unknown whether Linagliptin will have any positive effect on human EPC function where two prominent cardiovascular risk factors co-exist such as CKD and type 2 diabetes.

Therefore the investigators plan to investigate if Linagliptin can alter function and gene expression of CD34+ cells in a setting of CKD and type 2 diabetes. The investigators choose to look at non geriatric adult population with early type 2 diabetes (less than 10 years of duration) at an early phase of renal impairment (stages 1-3).

Being tested
Linagliptin, Placebo
Keywords
Diabetes Mellitus, Type 2, Endothelial cells, Cellular biomarker, endothelial dysfunction, CD34+, Impaired renal function
Medical subject headings
Diabetes Mellitus, Type 2, Renal Insufficiency

What participants receive

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

  • LinagliptinDrug

    Also called TRADJENTA

    5 mg tablet once daily for 12 weeks

  • PlaceboDrug

    1 tablet daily for 12 weeks

Study groups in NCT02467478
Study groupRoleWhat they receive
PlaceboPlacebo comparatorMatching placebo 1 pill daily for 12 weeks
Receives: Drug: Placebo
LinagliptinActive comparatorLinagliptin 5mg once daily for 12 weeks
Receives: Drug: Linagliptin

What is being measured

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

  1. Cellular Markers

    The investigators will use participants' peripheral blood derived CD34+ cells looking at number, function, and gene expression. Post Linagliptin will be compared to pre Linagliptin measurements. Here we report fold changes in protein populations as determined by ELISA.

    Measured: Week 12 expression as a fold difference to Week 0

  2. Urinary Function Marker in CKD

    We measure using microalbumin/creatinine ratio provided from a random spot urine sample.

    Measured: 12 weeks post beginning Linagliptin or placebo treatment

Secondary outcomes (11)
  1. Serum Endothelial Inflammatory Markers

    Serum endothelial inflammatory markers included here: high sensitivity C-reactive protein (hs-CRP)

    Measured: 12 weeks post Linagliptin or Placebo treatment

  2. Serum Endothelial Inflammatory Markers

    Serum endothelial inflammatory markers included here: Interleukin 6 (IL-6)

    Measured: 12 weeks post Linagliptin or Placebo treatment

  3. Fasting Lipid Profile

    Measured through serum biochemistry Lipid Panel

    Measured: 12 weeks post beginning Linagliptin or placebo treatment

  4. Glycemic Control

    Glycemic control is evaluated by measuring HbA1c levels to gauge changes in blood sugar control over last ~90 days

    Measured: 12 weeks post beginning Linagliptin or placebo treatment

  5. Glycemic Control: Fasting Glucose

    Glycemic control is evaluated by measuring fasting blood glucose at time of measurement

    Measured: 12 weeks post beginning Linagliptin or placebo treatment

  6. Glycemic Control: Insulin

    Glycemic control is evaluated by measuring insulin levels at the time of the visit

    Measured: 12 weeks post beginning Linagliptin or placebo treatment

  7. Adiposity

    Measured using the Tanita Body Composition Analyzer scale, measured as percentage body fat.

    Measured: 12 weeks post beginning Linagliptin or placebo treatment

  8. Estimation of Creatinine Clearance

    Measured via blood biochemistry eGFR, an alternative measurement to spot urine urine microalbumin/creatinine ratio presented above

    Measured: 12 weeks post beginning Linagliptin or placebo treatment

  9. Pulse Wave Analysis

    Vessel health is assessed by looking at Arterial stiffness. Augmentation index (AI) is defined as the ratio of the augmentation pressure to the pulse pressure, times 100, to give a percentage. Augmentation index 75 normalizes this value to an estimate of the AI at a heart rate of 75bpm. We used Vascular Flow and wave measurement equipment, SphygmoCor Central Pressure system from AtCor.

    Measured: 12 weeks post beginning Linagliptin or placebo treatment

  10. Pulse Wave Velocity

    Vessel health is assessed by looking at Arterial stiffness. Pulse wave velocity (PWV) measures the delay between the pulse registered at the femoral artery from the pulse at the carotid. The difference in distance between these two measurement points from the aortic notch is divided by this delay to give a speed. In stiffer, less healthy vessels, the PWV is increased. We used Vascular Flow and wave measurement equipment, SphygmoCor Central Pressure system from AtCor to perform this calculation.

    Measured: 12 weeks post beginning Linagliptin or placebo treatment

  11. Resting Metabolic Rate (RMR)

    (RMR, similar to Resting Energy expenditure measurement): Evaluation of changes in Basal Metabolic Rate

    Measured: 12 weeks post beginning Linagliptin or placebo treatment

Timeline

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

  1. First posted10 Jun 2015 (estimated)
  2. Study startApr 2015
  3. Primary completionApr 2019
  4. Study completionDec 2019

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 4
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
31 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT02467478
Sponsor's protocol ID
121439
Status last verified
Dec 2022
First submitted
8 Jun 2015
Last updated
19 Jan 2023
Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No: There is no current plan to share IPD with other researchers.

Publications

  • Awal HB, Nandula SR, Domingues CC, Dore FJ, Kundu N, Brichacek B, Fakhri M, Elzarki A, Ahmadi N, Safai S, Fosso M, Amdur RL, Sen S. Linagliptin, when compared to placebo, improves CD34+ve endothelial progenitor cells in type 2 diabetes subjects with chronic kidney disease taking metformin and/or insulin: a randomized controlled trial. Cardiovasc Diabetol. 2020 Jun 3;19(1):72. doi: 10.1186/s12933-020-01046-z.

    PubMed 32493344

Questions about this trial

What is this clinical trial studying?

A Phase 4 study testing Linagliptin in people with Type 2 Diabetes and Impaired Renal Function, run by George Washington University 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 6 inclusion and 25 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 19 Jan 2023. 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. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 19 Jan 2023). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

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?

Cellular Markers (time frame: Week 12 expression as a fold difference to Week 0). The study lists 2 primary outcomes in all. 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 NCT02467478, which also lists 1 linked publication.

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 19 Jan 2023.

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