Effects of Pulsatile Insulin Delivery on Diabetic Neuropathy in Patients With Types 1 and 2 Diabetes Mellitus

Diabetes Mellitus, With Complications Clinical Trial

Official title:

Effects of Pulsatile Insulin Delivery on Peripheral Diabetic Neuropathy

Clinical Trial Details — Status: Terminated

Administrative data

• NCT number: NCT00228891
• Other study ID #: H09-66 NEU1
• Secondary ID: MH42900 and MH01
• Status: Terminated
• Phase: Phase 2/Phase 3
• First received: September 27, 2005
• Last updated: August 8, 2016
• Start date: February 2004
• Est. completion date: August 2009

Study information

• Verified date: August 2016
• Source: Florida Atlantic University
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Institutional Review Board
• Study type: Interventional

Clinical Trial Summary

Diabetic neuropathy is a progressive complication causing serious problems in 25-40% of diabetic patients. Anecdotal reports have indicated improvement with pulsatile IV insulin in patients otherwise resistant to all conventional therapies. Significant complications produce painful peripheral dysesthesias, loss of sensation and gastroparesis. This study is designed to test the effectiveness of pulsatile insulin delivery on diabetic neuropathy.

Description:

Diabetic neuropathy (DN) is a progressive complication causing serious problems in 25%-40% of diabetic patients. Significant complications produce painful peripheral dysesthesias, loss of sensation, and gastroparesis. DN may affect the peripheral motor and sensory nerves in addition to the autonomic nervous system (1-3). Treatment strategies for patients with DN have generally concentrated on pain relief, without addressing the underlying pathophysiology of the disease (4). Anecdotal reports from patients treated with pulsatile insulin for other complications suggest that this treatment may show efficacy in patients with DN. This study is designed to compare patients with DN who receive pulsatile insulin with a control group.

Pulses of IV insulin encourages the glucose metabolism in diabetics to normalize in multiple organs, especially muscle, retina, liver, kidney and nerve endings. The process fundamentally requires the administration of high dose insulin pulses similar to those found in non diabetic humans by their pancreas into the surrounding portal circulation. Oral carbohydrates are given simultaneously to augment the process and prevent hypoglycemia. The process is monitored by frequent measuring of glucose levels and respiratory quotients (RQ). RQ is measured by a metabolic cart which determines the ratio VCO2/ VO2. This ratio is specific for the fuel used at any one time by the body. The glucose levels are monitored to keep glucose levels appropriate and the RQ determines the need to readjust the infusion protocol in each patient for subsequent insulin infusion sessions. The insulin pulses are delivered over 1-hour periods with a 1-hour rest period between each session. Three treatments are given during each treatment day.

The respiratory quotient (RQ) is a measurement of CO2 exhaled and O2 inhaled and is proportionate to the fuel sources being used by the body, primarily the liver over short periods of time. The higher the RQ, the more glucose and less alternative fuel sources are being utilized. Following the RQ change helps determine the effectiveness of physiological insulin administration in increasing anabolic functions in diabetic individuals. By improving the body's glucose metabolism and thereby causing beneficial effects of anabolic factors, the possibility of serious complications can be decreased. In addition the use of oral carbohydrate at the same time along with the physiologic insulin administration stimulates the appropriate gut hormones which augment this effect, a response which cannot be duplicated with intravenous glucose. The purpose of our studies is to determine whether the physiologic administration of insulin along with the augmenting effect of oral carbohydrates will normalize metabolism in diabetic patients and correlate with an improvement in their manifestations of diabetic neuropathy.

The RQ is determined by the use of a metabolic cart. Individuals breathe into a mask for 3-5 minutes after a rest period of 30 or more minutes. The ratio of exhaled volume of CO2 to the inhaled volume of O2 is determined as the RQ. The physiologic range is 0.7 to1.3. Individuals using fat as a primary fuel have a ratio of 0.7, protein or mixed fuels is 0.8-0.9 and carbohydrate is 0.9-1.0. Those taking excessive calories will have RQ's higher than 1.05.

1. Tesfaye S, Chaturvedi N, Eaton SEM, Ward JD, Manes C, Ionescu-Tirgoviste C, Witte DR, Fuller JH, Vascular Risk factors and Diabetic Neuropathy N Engl J Med 352:341-50, 2005.

2. Neuropathy Trust, Diabetic Neuropathy:Prevalence, www.neurocentre.com.

3. Potter PJ, Maryniak O, Yamorski R, Jones IC, Incidence of Peripheral Neuropathy in the Contralateral Limb of Persons with Unilateral Amputation due to Diabetes, Journal of Rehabilitation Research and Development 35:335-39, 1998.

4. Goldstein DJ, Lu Y, Detke MJ, Lee TC, Iyengan , Duloxetine versus Placebo in Patients with Painful Diabetic Neuropathy, Pain 116:109-18, 2005.

Recruitment information / eligibility

• Status: Terminated
• Enrollment: 152
• Est. completion date: August 2009
• Est. primary completion date: August 2009
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 20 Years to 90 Years

Eligibility

Inclusion Criteria:

• The researchers will include up to 500 patients both male and female between the ages of 20 and 90 diagnosed with type 1 or type 2 diabetes mellitus.

• All patients were diagnosed by their endocrinologists as having diabetic neuropathy

• All patients had failed conventional treatment for diabetic neuropathy

• Taking oral agents and/or insulin for diabetic control

• Under an Endocrinologists supervision for their diabetes management. Endocrinologist must assess and approve patient for participation in this study

• Ability to swallow without difficulty

• Ability to commit to the weekly time requirements associated with the study

Exclusion Criteria:

• Other causes of complications not related to diabetes

• Lack of intravenous access

• Pregnancy

• Alcohol abuse, drug addiction or the use of illegal drugs

• Positive HIV

• Inability to breathe into machine for respiratory quotients

Study Design

Allocation: Non-Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Investigator), Primary Purpose: Treatment

Related Conditions & MeSH terms

• Diabetes Mellitus
• Diabetes Mellitus, With Complications
• Diabetic Neuropathies

Intervention

Procedure:
• Effect of Pulsatile IV insulin on diabetic neuropathy
Control patients with diagnosed diabetic neuropathy will have objective testing at baseline and every six months to compare and measure results to patients receiving pulsatile intravenous insulin therapy.
• Effect of Pulsatile IV Insulin on diabetic neuropathy
Patients diagnosed with diabetic neuropathy will be treated with pulsatile intravenous insulin on a weekly basis. Patient's Endocrinologist will determine the dosage of intravenous insulin to be given each week based upon the patient's response and insulin resistance.

Locations

Country	Name	City	State
United States	Florida Atlantic University Center for Complex Systems and Brain Sciences	Boca Raton	Florida

Sponsors (3)

Lead Sponsor	Collaborator
Florida Atlantic University	Advanced Diabetes Treatment Centers, Global Infusions

Country where clinical trial is conducted

United States, 

References & Publications (5)

Gill G, Moulik P. Mortality and diabetic neuropathy. Diabet Med. 2005 Sep;22(9):1289. — View Citation

Goldstein DJ, Lu Y, Detke MJ, Lee TC, Iyengar S. Duloxetine vs. placebo in patients with painful diabetic neuropathy. Pain. 2005 Jul;116(1-2):109-18. — View Citation

Moghtaderi A, Bakhshipour A, Rashidi H. Validation of Michigan neuropathy screening instrument for diabetic peripheral neuropathy. Clin Neurol Neurosurg. 2006 Jul;108(5):477-81. Epub 2005 Sep 16. — View Citation

Potter PJ, Maryniak O, Yaworski R, Jones IC. Incidence of peripheral neuropathy in the contralateral limb of persons with unilateral amputation due to diabetes. J Rehabil Res Dev. 1998 Jul;35(3):335-9. — View Citation

Tesfaye S, Chaturvedi N, Eaton SE, Ward JD, Manes C, Ionescu-Tirgoviste C, Witte DR, Fuller JH; EURODIAB Prospective Complications Study Group. Vascular risk factors and diabetic neuropathy. N Engl J Med. 2005 Jan 27;352(4):341-50. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Measure the stabilization or reduction of the decline of diabetic neuropathy by pt questionnaires and diagnostic tests		Measure the stabilization and reduction of complications associated with diabetic neuropathy	No