Long-Term Effects of Insulin Plus Metformin Regimens on the Overall and Postprandial Glycemic Control of Patients With Type 2 Diabetes

Long-Term Effects of Insulin Plus Metformin Regimens on the Overall and Postprandial Glycemic Control of Patients With Type 2 Diabetes: A Comparison of Premeal Insulin Lispro Mixtures to Once-Daily Insulin Glargine

The primary objective of this study is to show that a prandial insulin regimen, consisting of premeal insulin lispro "mid mixture" (or a combined regimen of insulin lispro "mid mixture" and insulin lispro "low mixture") plus metformin will result in significantly better overall glycemic control (lower HbA1c) at endpoint than once-daily insulin glargine plus metformin. Insulin lispro "mid mixture" consists of 50% insulin lispro and 50% NPL. Insulin lispro "low mixture" consists of 25% insulin lispro and 75% NPL.

In a substudy of approximately 60 patients, additional data will be collected on markers associated with risk of atherosclerosis or cardiovascular disease in the context of a controlled, outpatient, high-fat test meal.

Study Overview

• Status: Completed
• Conditions: Diabetes Mellitus, Type 2
• Intervention / Treatment: Drug: metformin; Drug: insulin glargine; Drug: premeal insulin lispro mixtures

• Study Type: Interventional
• Enrollment: 320
• Phase: Phase 4

Contacts and Locations

Study Locations

• Australia
  • New South Wales
    • St Leonards, New South Wales, Australia, 2065
      • For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon-Fri from 9AM to 5PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician.
• Greece
  • Thessaloniki, Greece, 56429
    • For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon-Fri from 9AM to 5PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician.
• India
  • Maharstra
    • Mumbai, Maharstra, India, 400 007
      • For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon-Fri from 9AM to 5PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician.
• Netherlands
  • Den Helder, Netherlands, 1783 GZ
    • For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon-Fri from 9AM to 5PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician.
• Poland
  • Olesnica, Poland, 56-400
    • For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon-Fri from 9AM to 5PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician.
• Puerto Rico
  • Ponce, Puerto Rico, 00731
    • For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon-Fri from 9AM to 5PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician.
• United States
  • New Hampshire
    • Lebanon, New Hampshire, United States, 03756
      • For additional information regarding investigative sites for this trial, contact 1-877-CTLILLY (1-877-285-4559, 1-317-615-4559) Mon-Fri from 9AM to 5PM Eastern Time (UTC/GMT - 5 hours, EST), or speak with your personal physician.

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 35 years to 75 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Have type 2 diabetes (World Health Organization [WHO] classification
• Have used one or more of the following oral anti-hyperglycemic medications-metformin or second-generation sulfonylurea (for example, glibenclamide, glyburide, glipizide, gliclazide, glimepiride) alone or in combination with one or two insulin injections per day for at least 3 months immediately prior to entering the study. Patients using more than 2 insulin injections per day or subcutaneous insulin infusion prior to the study will not be eligible to participate.
• Have a hemoglobin A1c between 6.5% and 11%, inclusive, according to the central laboratory at Visit 1.
• Have clinically acceptable LDL-C, in the investigator's opinion, at Visit 1.
• As determined by the investigator, are capable and willing to learn how to use the insulin injection pens; comply with their prescribed diet, exercise, and medication regimen; perform self-monitoring of blood glucose; and use the patient diary as required for this protocol.

Exclusion Criteria:

• Have hypersensitivity to metformin or a known allergy to metformin hydrochloride, insulin lispro MM, insulin lispro LM, or insulin glargine, or excipients contained in these products.
• Have known metabolic or lactic acidosis.
• Have a history of renal transplantation or are currently receiving renal dialysis or have serum creatinine greater than or equal to 135 micromol/L (1.5 mg/dL) for males and greater than or equal to 110 micromol/L (1.2 mg/dL) for females.
• Have cardiac disease with functional status that is Class III or IV
• Have obvious clinical signs or symptoms of liver disease, acute or chronic hepatitis, or alanine transaminase (ALT) greater than three times the upper limit of the reference range as defined by the central laboratory.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
HbA1C

Secondary Outcome Measures

Outcome Measure
Safety
Weight
Fibrinogen
Total cholesterol
Insulin dose
Triglycerides
General inflammation (hsCRP)
High-density lipoprotein cholesterol
Estimates of low-density lipoprotein cholesterol
Nuclear magnetic resonance [NMR] analysis of lipids
Oxidized LDL
Lipoproteins and apoproteins
Blood glucose levels (based on self-monitoring)
Frequency and incidence of hypoglycemia
General well-being
Pilot two questionnaires for microvascular complications
Coagulopathy factors [substudy]
Surrogate measure of vascular reactivity [substudy]
Inflammatory markers [substudy]
Production of advanced glycation end-products [substudy]
Generation of oxidative species [substudy]
Lipids in various fractions [substudy]
Retinyl ester measurements in various fractions [substudy]
Composition of triglyceride-rich lipoproteins [substudy]
Compartmental modeling of postprandial lipemia [substudy]
Apolipoproteins [substudy]

Collaborators and Investigators

• Sponsor: Eli Lilly and Company

Publications and helpful links

General Publications

• Hirsch IB, Yuan H, Campaigne BN, Tan MH. Impact of prandial plus basal vs basal insulin on glycemic variability in type 2 diabetic patients. Endocr Pract. 2009 May-Jun;15(4):343-8. doi: 10.4158/EP08308.ORR.
• Chan JY, Leyk M, Frier BM, Tan MH. Relationship between HbA1c and hypoglycaemia in patients with type 2 diabetes treated with different insulin regimens in combination with metformin. Diabetes Metab Res Rev. 2009 Mar;25(3):224-31. doi: 10.1002/dmrr.929.
• Shrom D, Sarwat S, Ilag L, Bloomgarden ZT. Does A1c consistently reflect mean plasma glucose? J Diabetes. 2010 Jun;2(2):92-6. doi: 10.1111/j.1753-0407.2010.00066.x. Epub 2010 Jan 22.
• Sarwat S, Ilag LL, Carey MA, Shrom DS, Heine RJ. The relationship between self-monitored blood glucose values and glycated haemoglobin in insulin-treated patients with Type 2 diabetes. Diabet Med. 2010 May;27(5):589-92. doi: 10.1111/j.1464-5491.2010.02955.x.
• Robbins DC, Beisswenger PJ, Ceriello A, Goldberg RB, Moses RG, Pagkalos EM, Milicevic Z, Jones CA, Sarwat S, Tan MH. Mealtime 50/50 basal + prandial insulin analogue mixture with a basal insulin analogue, both plus metformin, in the achievement of target HbA1c and pre- and postprandial blood glucose levels in patients with type 2 diabetes: a multinational, 24-week, randomized, open-label, parallel-group comparison. Clin Ther. 2007 Nov;29(11):2349-64. doi: 10.1016/j.clinthera.2007.11.016.
• Beisswenger PJ, Brown WV, Ceriello A, Le NA, Goldberg RB, Cooke JP, Robbins DC, Sarwat S, Yuan H, Jones CA, Tan MH; IOOI Study Investigators. Meal-induced increases in C-reactive protein, interleukin-6 and tumour necrosis factor alpha are attenuated by prandial + basal insulin in patients with Type 2 diabetes. Diabet Med. 2011 Sep;28(9):1088-95. doi: 10.1111/j.1464-5491.2011.03324.x.

Study record dates

Study Major Dates

• Study Start: December 1, 2003
• Study Completion: September 1, 2005

Study Registration Dates

• First Submitted: September 12, 2005
• First Submitted That Met QC Criteria: September 12, 2005
• First Posted (Estimate): September 19, 2005

Study Record Updates

• Last Update Posted (Estimate): October 13, 2010
• Last Update Submitted That Met QC Criteria: October 12, 2010
• Last Verified: October 1, 2010

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Glucose Metabolism Disorders; Metabolic Diseases; Endocrine System Diseases; Diabetes Mellitus; Diabetes Mellitus, Type 2; Hypoglycemic Agents; Physiological Effects of Drugs; Insulin; Insulin, Globin Zinc; Metformin; Insulin Glargine; Insulin Lispro
• Other Study ID Numbers: 6146; F3Z-MC-IOOI