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Mitochondrial Impairment in Muscle Insulin Resistance

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ClinicalTrials.gov Identifier: NCT00222924
Recruitment Status : Completed
First Posted : September 22, 2005
Last Update Posted : December 19, 2007
Sponsor:
Collaborator:
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Information provided by:
University of Pittsburgh

Tracking Information
First Submitted Date  ICMJE September 20, 2005
First Posted Date  ICMJE September 22, 2005
Last Update Posted Date December 19, 2007
Study Start Date  ICMJE December 2003
Primary Completion Date Not Provided
Current Primary Outcome Measures  ICMJE
 (submitted: September 20, 2005)
To measure the functional capacity of mitochondria in skeletal muscle of those with T2DM and those at increased risk of developing T2DM
Original Primary Outcome Measures  ICMJE Same as current
Change History
Current Secondary Outcome Measures  ICMJE
 (submitted: September 20, 2005)
To assess whether exercise and diet can improve mitochondrial function and morphology.
Original Secondary Outcome Measures  ICMJE Same as current
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
 
Descriptive Information
Brief Title  ICMJE Mitochondrial Impairment in Muscle Insulin Resistance
Official Title  ICMJE Mitochondrial Impairment in Muscle Insulin Resistance
Brief Summary This investigation is being carried out to learn more about research findings from a study that was completed last year. Those findings revealed that within the skeletal muscle cells of individuals with type 2 diabetes, there was often damage to the mitochondria (the muscle cell's power source or the machinery of the muscle cell that produces energy). In individuals with type 2 diabetes, the liver continues to release sugar even when sugar levels are normal; the pancreas is not able to produce and release insulin normally; and the muscle and fat cells no longer respond as effectively to insulin. These defects lead to an abnormal rise of sugar in the blood. In this study, we want both to look more closely at the mitochondria and see if there is potential for improving mitochondrial functioning (improving the machinery of the muscle cell that produces energy) and reversing mitochondrial damage through a weight loss or a combined exercise/weight loss program. The program you get assigned to will be determined by a process called randomization (like a flip of a coin).
Detailed Description

Recent research from our laboratory has detected novel findings concerning damage to mitochondria within skeletal muscle in type 2 diabetes (type 2 DM), damage that is evident morphologically and by functional criteria. In this project, we propose, firstly, to more fully test this hypothesis of an impaired bio-energetic capacity, and to begin to examine the pathogenesis of damage to mitochondria in type 2 DM. We are also interested in assessing the potential for reversing damage, and improving functional capacity of mitochondria through a weight loss or a combined exercise and weight loss intervention.

The first specific aim is to measure the functional capacity of mitochondria in human skeletal muscle in type 2 DM and in those at apparent risk for type 2 DM (obese, sedentary, non-diabetic adults with the Metabolic Syndrome and/or impaired glucose tolerance). The second specific aim is to examine the morphology of mitochondria in human skeletal muscle in type 2 DM and in those at apparent risk for type 2 DM. The third specific aim is to examine the pathogenesis of mitochondrial damage in type 2 DM and in those at apparent risk for type 2 DM. The fourth specific aim is to assess whether exercise and diet can improve mitochondrial function and morphology in type 2 DM and in those at apparent risk for type 2 DM.

Study Type  ICMJE Interventional
Study Phase  ICMJE Not Applicable
Study Design  ICMJE Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Condition  ICMJE
  • Diabetes
  • Obesity
Intervention  ICMJE Behavioral: weight loss/ exercise
Study Arms  ICMJE Not Provided
Publications * Not Provided

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Recruitment Information
Recruitment Status  ICMJE Completed
Enrollment  ICMJE
 (submitted: September 20, 2005)
49
Original Enrollment  ICMJE Same as current
Actual Study Completion Date  ICMJE December 2006
Primary Completion Date Not Provided
Eligibility Criteria  ICMJE

Inclusion Criteria:

  • AGE 30 to 55 years old BMI 28 to 38 kg/m2 BLOOD PRESSURE Systolic < 150 ; Diastolic < 95 SEDENTARY Currently not engaged in a regular exercise program and a VO2 max pre-training value < 55 ml/kg-fat free mass-min HEALTH (Group 1) Type 2 diabetes mellitus for < 10 years and independent in SBGM HEALTH (Group 2) Non-diabetic with impaired glucose tolerance (as per ADA) or with Metabolic Syndrome (as per NCEP-ATP III)

HEALTH Must be in good general health with no known h/o the following:

liver disease, kidney disease, PVD (including diminished pulses, or H/O thrombophlebitis), heart disease (including any h/o MI), neuromuscular disease, neurological disease (including peripheral neuropathy or muscle wasting), paresis, edema , current malignancy, or any drug or alcohol abuse, LAB VALUES Enroll if: No Proteinuria (defined as < 1+ protein on routine dipstick) Hct > 34% ALT < 80, AST < 80, Alk Phos < 240 sTSH < 8 (Group 2) 2 hr glucose on OGTT >140mg/dl but < 200mg/dl or NCEP-ATP III criteria) Triglyceride < 450 Cholesterol < 300 Negative Urine Pregnancy

Exclusion Criteria:

  • (Group 1) anti-hypertensives, "statin" hypolipemics, and diabetic medications okay but exclude if taking: insulin, or a hypolipemic that is not a "statin" (Group 2) "statin" hypolipemic medications are okay. A hypolipemic that is not a "statin" will exclude.

Inability and / or unwillingness to comply with the protocol as written Previous difficulty with lidocaine or other local anesthetic Claustrophobia Wt gain or loss of > 3 kg during past 4 weeks

Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 30 Years to 55 Years   (Adult)
Accepts Healthy Volunteers  ICMJE Yes
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE United States
Removed Location Countries  
 
Administrative Information
NCT Number  ICMJE NCT00222924
Other Study ID Numbers  ICMJE 021165
R01DK049200 ( U.S. NIH Grant/Contract )
Has Data Monitoring Committee Not Provided
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement  ICMJE Not Provided
Responsible Party Not Provided
Study Sponsor  ICMJE University of Pittsburgh
Collaborators  ICMJE National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Investigators  ICMJE
Principal Investigator: David E. Kelley, MD University of Pittsburgh
PRS Account University of Pittsburgh
Verification Date December 2007

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP