Sensor-Augmented Insulin-Pump Therapy in New-onset Diabetes After Transplantation

NCT ID: NCT01680185

Last Updated: 2018-06-06

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE3
• Total Enrollment: 85 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2012-08-31
• Study Completion Date: 2018-05-31

Brief Summary

The SAPT-NODAT study will test the hypotheses that intensive subcutaneous insulin treatment with short acting insulin, applied continuously through an insulin pump, (i) improves glycemic control, (ii) reduces the prevalence of NODAT and prediabetes, and (iii) offers further β-cell protection, in comparison to the standard of care control group, and the basal insulin treatment group. In the SAPT-NODAT study, we will employ sensor-augmented insulin-pump technology, which performs like a semi-closed loop to prevent hypoglycemic events. Patients in the SAPT-NODAT study will be followed through 24 months post-transplantation.

Detailed Description

Introduction: New-onset diabetes after transplantation (NODAT) is strongly associated with postoperative hyperglycemia, and reduced patient as well as graft survival. In our recent proof-of-concept clinical trial (TIP), we have shown that immediate post-transplant basal insulin therapy decreases hyperglycemia and reduces the prevalence of NODAT by improving pancreatic β-cell function. In consequence, a collaborative multicenter study on NODAT prevention using basal insulin has been approved by the National Institutes of Health (NIH), and will start recruiting 380 patients at 6 international transplant centers, including the Medical University of Vienna and the University of Michigan in 2012. In addition to the NIH-sponsored trial, the Vienna SAPT-NODAT study will test the hypotheses that intensive subcutaneous insulin treatment with short acting insulin, applied continuously through an insulin pump in combination with a glucose sensor (SAPT), (i) improves glycemic control, (ii) reduces the prevalence of NODAT and prediabetes, and (iii) offers further β-cell protection, in comparison to the standard of care control group, and the basal insulin treatment group.

Methods: Combining the NIH-sponsored basal insulin study and the SAPT-NODAT study will yield three study arms, with 28 patients in each arm, namely: [1] the control arm, treated by standard-of-care; [2] the basal insulin arm, treated predominantly with intermediate acting NPH insulin (human insulin isophane, Humulin N, Eli Lilly); [3] the SAPT arm, treated with short acting insulin (Insulin lispro, Humalog, Eli Lilly), applied continuously by SAPT technology. Adult patients with absence of diabetes will be randomized prior to renal transplantation and stratified by deceased donor or living donor, if they are capable of understanding the study and are willing to give informed written consent for all three study arms. Patients will receive standard triple immunosuppressive medications (twice-daily tacrolimus, mycophenolate mofetil or mycophenolic sodium and steroids) with predefined tacrolimus targets and steroid doses. The algorithm for insulin administration is designed to account for the prominent evening peak of hyperglycemia observed in our previous TIP-study. The primary endpoint is HbA1c (in rel.%), at 3 months, and superiority will be assumed if a statistically significant difference between the SAPT-treatment group versus the standard-of-care control group can be determined, by two-sided Student's t-test. Secondary endpoints will be compared between all three groups and will include hypoglycemic events, glycemic variability, 2h glucose ≥200 mg/dL (by oral glucose tolerance test [OGTT] to determine prevalence of diabetes, prediabetes and normal glucose tolerance), beta cell function and insulin sensitivity derived from OGTT, serum creatinine, quality of life measures, patient and graft survival. All secondary endpoint comparisons relying on OGTTs will be made at 6, 12 and 24 months after kidney transplantation, respectively. The result of the 6-months OGTT will be blinded to patients and investigators to prevent subsequent treatment bias.

Discussion: Basal insulin treatment in our previous proof-of-concept study could not prevent a high number of transplant patients exhibiting overt prediabetes (impaired glucose tolerance) at 3, 6 and 12 months, probably on the basis that hyperglycemia was improved, but far from being aggressively treated in patients receiving basal insulin. Prediabetes however is an independent predictor of all-cause mortality in patients after renal transplantation, and therefore not only a harbinger of overt diabetes mellitus but rather a high-risk condition per se. The use of HbA1c as primary endpoint at three months is debatable, but necessary to determine whether SAPT technology may lead to a clinically meaningful improvement of overall glucose control. Specifically, in our previous study (TIP), we observed an intra-individual rise in HbA1c (0.5±0.7 rel.%) from baseline to 3 months, despite basal insulin treatment. If the intra-individual rise in the SAPT arm will remain below that value, SAPT technology could be considered to be a clinically meaningful improvement. The SAPT-NODAT study, besides holding promise to further improve glycemic control, thereby reducing diabetes, prediabetes and possibly cardiovascular events after transplantation, may ensure that the present team of investigators continues to take the lead in post-transplant insulin administration, which is emerging as a central focus in NODAT-prevention and may soon reach broader clinical application.

(Study approval: EK-Nr. 10/2012)

Conditions

Hyperglycemia

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: PREVENTION
• Blinding Strategy: NONE

Study Groups

Sensor-augmented Insulin Pump

Continuous subcutaneous sensor-augmented insulin-pump therapy (SAPT) with an insulin pump from Medtronic (Paradigm® Velo) for a period of approximately 3 months post-transplantation.

Group Type: ACTIVE_COMPARATOR

Insulin lispro, Humalog (Eli Lilly) in insulin pump

Intervention Type: DRUG

all covered above

Basal insulin

NPH insulin titration regimen, as specified in the IPT-NODAT study

Group Type: ACTIVE_COMPARATOR

Human insulin isophane, Humulin N (Eli Lilly)

Intervention Type: DRUG

all covered above

Standard of care

Patients assigned in this arm will receive standard of care following their kidney transplantation

Group Type: ACTIVE_COMPARATOR

Standard of care

Intervention Type: OTHER

all covered above

Interventions

Insulin lispro, Humalog (Eli Lilly) in insulin pump

all covered above

Intervention Type: DRUG

Human insulin isophane, Humulin N (Eli Lilly)

all covered above

Intervention Type: DRUG

Standard of care

all covered above

Intervention Type: OTHER

Other Intervention Names

Sliding scale short acting insulin for hyperglycemi; Sulphonylurea for NODAT

Eligibility Criteria

Inclusion Criteria

• Adult patients with end stage renal disease undergoing kidney transplantation with a deceased or living donor kidney.
• Absence of diabetes prior to kidney transplantation, defined according to American Diabetes Association guideline (not on oral hypoglycemic agents or insulin with fasting glucose <126 mg/dL).
• Receiving standard triple immunosuppressive medications that include tacrolimus, mycophenolate mofetil or mycophenolic sodium and steroids.
• Capable of understanding the study and willing to give informed written consent for study participation.

Exclusion Criteria

• Patients with a diagnosis of diabetes mellitus prior to kidney transplantation, or receiving anti-diabetic medications, or having pre-transplant fasting glucose level equal or greater than 126 mg/dL on two occasions at least three days apart.
• Patients receiving an organ transplant other than kidney.
• Patients receiving an unlicensed drug or therapy within one month prior to study entry.
• Patients with history of hypersensitivity to injectable insulin.
• Patients with documented HIV infection.

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Medical University of Vienna

OTHER

Sponsor Role: lead

Responsible Party

Marcus Saemann

Prof. Dr. Marcus Säemann

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Marcus D Säemann, MD

Role: PRINCIPAL_INVESTIGATOR

Medical University of Vienna

Locations

Medical University of Vienna

Vienna, , Austria

Countries

Austria

References

Lo C, Toyama T, Oshima M, Jun M, Chin KL, Hawley CM, Zoungas S. Glucose-lowering agents for treating pre-existing and new-onset diabetes in kidney transplant recipients. Cochrane Database Syst Rev. 2020 Jul 30;8(8):CD009966. doi: 10.1002/14651858.CD009966.pub3.

Reference Type: DERIVED

PMID: 32803882 (View on PubMed)

Other Identifiers

SAPT-NODAT_9march2012

Identifier Type: -

Identifier Source: org_study_id