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Pilot Study of Losartan and N-acetylcysteine as Inhibitors of Muscle Oxidative Stress in Elderly

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT01384591
Recruitment Status : Completed
First Posted : June 29, 2011
Results First Posted : May 8, 2018
Last Update Posted : May 8, 2018
Sponsor:
Collaborator:
Lantheus Medical Imaging
Information provided by (Responsible Party):
The University of Texas Medical Branch, Galveston

Brief Summary:

The general hypothesis is that elderly have diminished nutritive flow to skeletal muscle and impaired capacity for building muscle. In aging populations, this decreased ability to build muscle may represent a tipping point in the progression towards chronic physical frailty and disability. The goal is to examine whether novel pharmacologic therapies can improve nutritive blood flow to the muscles and muscle building in the elderly.

The purpose of this study is 1) to determine if losartan administration will enhance blood flow and 2) to determine if N-acetylcysteine (NAC) will enhance blood flow.

The investigators will study community dwelling, healthy older men and women (60-85 years). Subjects will be randomized to one of three groups:

Experimental Group 1: Placebo losartan and placebo N-acetylcysteine (NAC). Experimental Group 2: losartan (25mg/dose) and placebo N-acetylcysteine (NAC). Experimental Group 3: N-acetylcysteine (NAC) (50 mg/kg/dose) and placebo

Subjects will admit to the clinic on day 1 of the study. Baseline testing consisting of leg blood flow (LBF), contrast enhanced ultrasound, handgrip testing and fatigue questionnaires. After testing is completed the subjects will recieve their first dose of NAC/ losartan/ placebo with dinner. Subjects will be fasted after 10 pm. On day 2, leg blood flow (LBF) will be measured approximately 12 hours post dose 1. Subjects will receive their second dose of NAC/ losartan/ placebo. Leg blood flow will be measured 1 hour and 2 hours post dose 2 of study interventions. The subjects will eat a meal and receive their third dose of the study intervention. Leg blood flow will be repeated at 1 hour and 2 hours post dose 3. Appoximately 30 minutes after dose 3 of the study intervention, handgrip testing will be performed and fatigue questionnaires completed.


Condition or disease Intervention/treatment Phase
Aging Drug: N-acetylcysteine Drug: Losartan Drug: Placebo losartan Drug: Placebo N-acetylcysteine Phase 1 Phase 2

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 6 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Pilot Study of Losartan and N-acetylcysteine as Inhibitors of Muscle Oxidative Stress in Elderly
Study Start Date : July 2011
Actual Primary Completion Date : May 2015
Actual Study Completion Date : May 2015

Resource links provided by the National Library of Medicine


Arm Intervention/treatment
Experimental: Losartan and placebo N-acetylcysteine
losartan (25mg/dose) and placebo N-acetylcysteine (NAC) 3 total doses: 1 dose on day 1, 2 doses on day 2.
Drug: Losartan
25mg/dose. 3 total doses: 1 dose on day 1, 2 doses on day 2.
Other Name: Cozaar

Drug: Placebo N-acetylcysteine
Placebo N-acetylcysteine 3 total doses: 1 dose on day 1, 2 doses on day 2.
Other Name: Placebo

Placebo Comparator: Placebo losartan and placebo N-acetylcysteine
Placebo losartan and placebo N-acetylcysteine (NAC) 3 total doses: 1 dose on day 1, 2 doses on day 2.
Drug: Placebo losartan
Placebo losartan 3 total doses: 1 dose on day 1, 2 doses on day 2.
Other Name: Placebo

Drug: Placebo N-acetylcysteine
Placebo N-acetylcysteine 3 total doses: 1 dose on day 1, 2 doses on day 2.
Other Name: Placebo

Experimental: N-acetylcysteine and placebo losartan
N-acetylcysteine (NAC) (50 mg/kg/dose) and placebo losartan 3 total doses: 1 dose on day 1, 2 doses on day 2.
Drug: N-acetylcysteine
50 mg/kg/dose. 3 total doses: 1 dose on day 1, 2 doses on day 2.
Other Name: NAC

Drug: Placebo losartan
Placebo losartan 3 total doses: 1 dose on day 1, 2 doses on day 2.
Other Name: Placebo




Primary Outcome Measures :
  1. Leg Blood Flow as Measured by Doppler Ultrasound [ Time Frame: Baseline ]
    Femoral Doppler Blood Flow was evaluated via Doppler ultrasound. For the two-dimensional (2-D) and Doppler ultrasound measurements, an ultrasound system (HDI-5000; Philips Medical Systems, Bothell, WA) with a linear array transducer (L7-4) was used with a transmit frequency of 12MHz. 2-D imaging of the common femoral artery will be performed in the long axis. Images will be triggered to the R wave of the cardiac cycle, and the femoral artery diameter will be measured using online video calipers. A pulsed-wave Doppler sample blood volume will be placed at the same location in the center of the artery, and the mean blood velocity will be measured using online angle correction and analysis software. Femoral artery mean blood flow will be calculated from 2-D and Doppler ultrasound data using the equation: Q = vπ ∙ (d/2)2, where Q is femoral blood flow, v is mean femoral artery blood flow velocity, and d is femoral artery diameter.

  2. Leg Blood Flow as Measured by Doppler Ultrasound [ Time Frame: 12 hours post dose one of the intervention ]
    Femoral Doppler Blood Flow was evaluated via Doppler ultrasound. For the two-dimensional (2-D) and Doppler ultrasound measurements, an ultrasound system (HDI-5000; Philips Medical Systems, Bothell, WA) with a linear array transducer (L7-4) was used with a transmit frequency of 12MHz. 2-D imaging of the common femoral artery will be performed in the long axis. Images will be triggered to the R wave of the cardiac cycle, and the femoral artery diameter will be measured using online video calipers. A pulsed-wave Doppler sample blood volume will be placed at the same location in the center of the artery, and the mean blood velocity will be measured using online angle correction and analysis software. Femoral artery mean blood flow will be calculated from 2-D and Doppler ultrasound data using the equation: Q = vπ ∙ (d/2)2, where Q is femoral blood flow, v is mean femoral artery blood flow velocity, and d is femoral artery diameter.

  3. Leg Blood Flow as Measured by Doppler Ultrasound [ Time Frame: 1 hour post dose two of the intervention, average of 13 hours post dose 1 of the intervention ]
    Femoral Doppler Blood Flow was evaluated via Doppler ultrasound. For the two-dimensional (2-D) and Doppler ultrasound measurements, an ultrasound system (HDI-5000; Philips Medical Systems, Bothell, WA) with a linear array transducer (L7-4) was used with a transmit frequency of 12MHz. 2-D imaging of the common femoral artery will be performed in the long axis. Images will be triggered to the R wave of the cardiac cycle, and the femoral artery diameter will be measured using online video calipers. A pulsed-wave Doppler sample blood volume will be placed at the same location in the center of the artery, and the mean blood velocity will be measured using online angle correction and analysis software. Femoral artery mean blood flow will be calculated from 2-D and Doppler ultrasound data using the equation: Q = vπ ∙ (d/2)2, where Q is femoral blood flow, v is mean femoral artery blood flow velocity, and d is femoral artery diameter.

  4. Leg Blood Flow as Measured by Doppler Ultrasound [ Time Frame: 2 hours post dose two of the intervention, average of 14 hours post dose one of the intervention ]
    Femoral Doppler Blood Flow was evaluated via Doppler ultrasound. For the two-dimensional (2-D) and Doppler ultrasound measurements, an ultrasound system (HDI-5000; Philips Medical Systems, Bothell, WA) with a linear array transducer (L7-4) was used with a transmit frequency of 12MHz. 2-D imaging of the common femoral artery will be performed in the long axis. Images will be triggered to the R wave of the cardiac cycle, and the femoral artery diameter will be measured using online video calipers. A pulsed-wave Doppler sample blood volume will be placed at the same location in the center of the artery, and the mean blood velocity will be measured using online angle correction and analysis software. Femoral artery mean blood flow will be calculated from 2-D and Doppler ultrasound data using the equation: Q = vπ ∙ (d/2)2, where Q is femoral blood flow, v is mean femoral artery blood flow velocity, and d is femoral artery diameter.

  5. Leg Blood Flow as Measured by Doppler Ultrasound [ Time Frame: Post dose three of the intervention and a meal, average of 17 hours post dose one of the intervention ]
    Femoral Doppler Blood Flow was evaluated via Doppler ultrasound. For the two-dimensional (2-D) and Doppler ultrasound measurements, an ultrasound system (HDI-5000; Philips Medical Systems, Bothell, WA) with a linear array transducer (L7-4) was used with a transmit frequency of 12MHz. 2-D imaging of the common femoral artery will be performed in the long axis. Images will be triggered to the R wave of the cardiac cycle, and the femoral artery diameter will be measured using online video calipers. A pulsed-wave Doppler sample blood volume will be placed at the same location in the center of the artery, and the mean blood velocity will be measured using online angle correction and analysis software. Femoral artery mean blood flow will be calculated from 2-D and Doppler ultrasound data using the equation: Q = vπ ∙ (d/2)2, where Q is femoral blood flow, v is mean femoral artery blood flow velocity, and d is femoral artery diameter.

  6. Leg Blood Flow as Measured by Doppler Ultrasound [ Time Frame: 1 hour post dose three of the intervention and a meal, average of 18 hours post dose one of the intervention ]
    Femoral Doppler Blood Flow was evaluated via Doppler ultrasound. For the two-dimensional (2-D) and Doppler ultrasound measurements, an ultrasound system (HDI-5000; Philips Medical Systems, Bothell, WA) with a linear array transducer (L7-4) was used with a transmit frequency of 12MHz. 2-D imaging of the common femoral artery will be performed in the long axis. Images will be triggered to the R wave of the cardiac cycle, and the femoral artery diameter will be measured using online video calipers. A pulsed-wave Doppler sample blood volume will be placed at the same location in the center of the artery, and the mean blood velocity will be measured using online angle correction and analysis software. Femoral artery mean blood flow will be calculated from 2-D and Doppler ultrasound data using the equation: Q = vπ ∙ (d/2)2, where Q is femoral blood flow, v is mean femoral artery blood flow velocity, and d is femoral artery diameter.

  7. Leg Blood Flow as Measured by Doppler Ultrasound [ Time Frame: 2 hours post dose three of the intervention and a meal, average of 19 hours post dose one of the intervention ]
    Femoral Doppler Blood Flow was evaluated via Doppler ultrasound. For the two-dimensional (2-D) and Doppler ultrasound measurements, an ultrasound system (HDI-5000; Philips Medical Systems, Bothell, WA) with a linear array transducer (L7-4) was used with a transmit frequency of 12MHz. 2-D imaging of the common femoral artery will be performed in the long axis. Images will be triggered to the R wave of the cardiac cycle, and the femoral artery diameter will be measured using online video calipers. A pulsed-wave Doppler sample blood volume will be placed at the same location in the center of the artery, and the mean blood velocity will be measured using online angle correction and analysis software. Femoral artery mean blood flow will be calculated from 2-D and Doppler ultrasound data using the equation: Q = vπ ∙ (d/2)2, where Q is femoral blood flow, v is mean femoral artery blood flow velocity, and d is femoral artery diameter.


Secondary Outcome Measures :
  1. Handgrip Strength of Dominant Hand as Measured by Handgrip Dynamometry at 50% Perceived Effort at Baseline [ Time Frame: baseline ]
    Handgrip Strength of dominant hand is measured by handgrip dynamometry at 50% perceived effort with subjects performing one set of three contractions.

  2. Handgrip Strength of Non-dominant Hand as Measured by Handgrip Dynamometry at 50% Perceived Effort at Baseline [ Time Frame: baseline ]
    Handgrip Strength of non-dominant hand is measured by handgrip dynamometry at 50% perceived effort with subjects performing one set of three contractions.

  3. Handgrip Strength of Dominant Hand as Measured by Handgrip Dynamometry at 100% Effort at Baseline [ Time Frame: baseline ]
    Handgrip Strength of dominant hand is measured by handgrip dynamometry at 100% effort with subjects performing one set of three contractions.

  4. Handgrip Strength of Non-dominant Hand as Measured by Handgrip Dynamometry at 100% Effort at Baseline [ Time Frame: baseline ]
    Handgrip Strength of non-dominant hand is measured by handgrip dynamometry at 100% effort with subjects performing one set of three contractions.

  5. Handgrip Fatigue of Dominant Hand as Measured by Handgrip Dynamometry at Baseline [ Time Frame: baseline ]
    Handgrip fatigue of dominant hand as measured by handgrip dynamometry fatigue test. The non-dominant hand hold a continuous contraction at 20% of the subjects maximal voluntary contraction for 5 minutes. Data is reported as % of Maximal Voluntary Contraction after fatigue test.

  6. Handgrip Fatigue of Non-dominant Hand as Measured by Handgrip Dynamometry at Baseline [ Time Frame: baseline ]
    Handgrip fatigue of non-dominant hand as measured by handgrip dynamometry fatigue test. The non-dominant hand hold a continuous contraction at 20% of the subjects maximal voluntary contraction for 5 minutes. Data is reported as % of Maximal Voluntary Contraction (MVC) after fatigue test.

  7. Handgrip Strength of Dominant Hand as Measured by Handgrip Dynamometry at 50% Perceived Effort After All Doses of Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention ]
    Handgrip Strength of dominant hand is measured by handgrip dynamometry at 50% perceived effort with subjects performing one set of three contractions.

  8. Handgrip Strength of Non-dominant Hand as Measured by Handgrip Dynamometry at 50% Perceived Effort After All Doses of Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention ]
    Handgrip Strength of non-dominant hand is measured by handgrip dynamometry at 50% perceived effort with subjects performing one set of three contractions.

  9. Handgrip Strength of Dominant Hand as Measured by Handgrip Dynamometry at 100% Perceived Effort After All Doses of Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention ]
    Handgrip Strength of dominant hand is measured by handgrip dynamometry at 100% perceived effort with subjects performing one set of three contractions.

  10. Handgrip Strength of Non-dominant Hand as Measured by Handgrip Dynamometry at 100% Perceived Effort After All Doses of Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention ]
    Handgrip Strength of non-dominant hand is measured by handgrip dynamometry at 100% perceived effort with subjects performing one set of three contractions.

  11. Handgrip Fatigue of Dominant Hand as Measured by Handgrip Dynamometry After All Doses of Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention ]
    Handgrip fatigue of dominant hand as measured by handgrip dynamometry fatigue test. The non-dominant hand hold a continuous contraction at 20% of the subjects maximal voluntary contraction for 5 minutes. Data reported as % of Maximal Voluntary Contraction (MVC) after fatigue test.

  12. Handgrip Fatigue of Non-dominant Hand as Measured by Handgrip Dynamometry After All Doses of Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention ]
    Handgrip fatigue of non-dominant hand as measured by handgrip dynamometry fatigue test. The non-dominant hand hold a continuous contraction at 20% of the subjects maximal voluntary contraction for 5 minutes. Data reported as % of Maximal Voluntary Contraction (MVC) after fatigue test.

  13. Personal Perceptual Fatigue Measured by Multidimensional Fatigue Symptom Inventory - Subscale General Fatigue at Baseline [ Time Frame: Baseline ]

    Multidimensional Fatigue Symptom Inventory Short Form (MFSI-SF) from the Moffitt Cancer Center, University of South Florida The MFSI-SF is a 30 question assessment designed to assess the principal manifestations of fatigue.

    There 5 subscales used to calculate a total score. The subscales are: General Fatigue, Physical Fatigue, Emotional Fatigue, Mental Fatigue, and Vigor (an estimate of the patient's energy level). The total score is calculated with the equation: (general + physical + emotional + mental) - vigor = total score.

    The range of the general fatigue scale is 24 to 0, with the higher number meaning more fatigue.

    The range of the total score is -24 to 96, with the higher the number meaning more fatigue.


  14. Personal Perceptual Fatigue Measured by Multidimensional Fatigue Symptom Inventory - Subscale General Fatigue After All Doses of Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention ]

    Multidimensional Fatigue Symptom Inventory Short Form (MFSI-SF) from the Moffitt Cancer Center, University of South Florida The MFSI-SF is a 30 question assessment designed to assess the principal manifestations of fatigue.

    There 5 subscales used to calculate a total score. The subscales are: General Fatigue, Physical Fatigue, Emotional Fatigue, Mental Fatigue, and Vigor (an estimate of the patient's energy level). The total score is calculated with the equation: (general + physical + emotional + mental) - vigor = total score.

    The range of the general fatigue scale is 24 to 0, with the higher number meaning more fatigue.

    The range of the total score is -24 to 96, with the higher the number meaning more fatigue.


  15. Personal Perceptual Fatigue Measured by Multidimensional Fatigue Symptom Inventory - Subscale Physical Fatigue at Baseline [ Time Frame: Baseline ]

    Multidimensional Fatigue Symptom Inventory Short Form (MFSI-SF) from the Moffitt Cancer Center, University of South Florida The MFSI-SF is a 30 question assessment designed to assess the principal manifestations of fatigue.

    There 5 subscales used to calculate a total score. The subscales are: General Fatigue, Physical Fatigue, Emotional Fatigue, Mental Fatigue, and Vigor (an estimate of the patient's energy level). The total score is calculated with the equation: (general + physical + emotional + mental) - vigor = total score.

    The range of the physical fatigue scale is 24 to 0, with the higher number meaning more fatigue.

    The range of the total score is -24 to 96, with the higher the number meaning more fatigue.


  16. Personal Perceptual Fatigue Measured by Multidimensional Fatigue Symptom Inventory - Subscale Physical Fatigue After All Doses of Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention ]

    Multidimensional Fatigue Symptom Inventory Short Form (MFSI-SF) from the Moffitt Cancer Center, University of South Florida The MFSI-SF is a 30 question assessment designed to assess the principal manifestations of fatigue.

    There 5 subscales used to calculate a total score. The subscales are: General Fatigue, Physical Fatigue, Emotional Fatigue, Mental Fatigue, and Vigor (an estimate of the patient's energy level). The total score is calculated with the equation: (general + physical + emotional + mental) - vigor = total score.

    The range of the physical fatigue scale is 24 to 0, with the higher number meaning more fatigue.

    The range of the total score is -24 to 96, with the higher the number meaning more fatigue.


  17. Personal Perceptual Fatigue Measured by Multidimensional Fatigue Symptom Inventory - Subscale Emotional Fatigue at Baseline [ Time Frame: Baseline ]

    Multidimensional Fatigue Symptom Inventory Short Form (MFSI-SF) from the Moffitt Cancer Center, University of South Florida The MFSI-SF is a 30 question assessment designed to assess the principal manifestations of fatigue.

    There 5 subscales used to calculate a total score. The subscales are: General Fatigue, Physical Fatigue, Emotional Fatigue, Mental Fatigue, and Vigor (an estimate of the patient's energy level). The total score is calculated with the equation: (general + physical + emotional + mental) - vigor = total score.

    The range of the emotional fatigue scale is 24 to 0, with the higher number meaning more fatigue.

    The range of the total score is -24 to 96, with the higher the number meaning more fatigue.


  18. Personal Perceptual Fatigue Measured by Multidimensional Fatigue Symptom Inventory - Subscale Emotional Fatigue After All Doses of Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention ]

    Multidimensional Fatigue Symptom Inventory Short Form (MFSI-SF) from the Moffitt Cancer Center, University of South Florida The MFSI-SF is a 30 question assessment designed to assess the principal manifestations of fatigue.

    There 5 subscales used to calculate a total score. The subscales are: General Fatigue, Physical Fatigue, Emotional Fatigue, Mental Fatigue, and Vigor (an estimate of the patient's energy level). The total score is calculated with the equation: (general + physical + emotional + mental) - vigor = total score.

    The range of the emotional fatigue scale is 24 to 0, with the higher number meaning more fatigue.

    The range of the total score is -24 to 96, with the higher the number meaning more fatigue.


  19. Personal Perceptual Fatigue Measured by Multidimensional Fatigue Symptom Inventory - Subscale Mental Fatigue at Baseline [ Time Frame: Baseline ]

    Multidimensional Fatigue Symptom Inventory Short Form (MFSI-SF) from the Moffitt Cancer Center, University of South Florida The MFSI-SF is a 30 question assessment designed to assess the principal manifestations of fatigue.

    There 5 subscales used to calculate a total score. The subscales are: General Fatigue, Physical Fatigue, Emotional Fatigue, Mental Fatigue, and Vigor (an estimate of the patient's energy level). The total score is calculated with the equation: (general + physical + emotional + mental) - vigor = total score.

    The range of the mental fatigue scale is 24 to 0, with the higher number meaning more fatigue.

    The range of the total score is -24 to 96, with the higher the number meaning more fatigue.


  20. Personal Perceptual Fatigue Measured by Multidimensional Fatigue Symptom Inventory - Subscale Mental Fatigue After All Doses of Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention ]

    Multidimensional Fatigue Symptom Inventory Short Form (MFSI-SF) from the Moffitt Cancer Center, University of South Florida The MFSI-SF is a 30 question assessment designed to assess the principal manifestations of fatigue.

    There 5 subscales used to calculate a total score. The subscales are: General Fatigue, Physical Fatigue, Emotional Fatigue, Mental Fatigue, and Vigor (an estimate of the patient's energy level). The total score is calculated with the equation: (general + physical + emotional + mental) - vigor = total score.

    The range of the mental fatigue scale is 24 to 0, with the higher number meaning more fatigue

    The range of the total score is -24 to 96, with the higher the number meaning more fatigue.


  21. Personal Perceptual Fatigue Measured by Multidimensional Fatigue Symptom Inventory - Subscale Vigor Fatigue at Baseline [ Time Frame: Baseline ]

    Multidimensional Fatigue Symptom Inventory Short Form (MFSI-SF) from the Moffitt Cancer Center, University of South Florida The MFSI-SF is a 30 question assessment designed to assess the principal manifestations of fatigue.

    There 5 subscales used to calculate a total score. The subscales are: General Fatigue, Physical Fatigue, Emotional Fatigue, Mental Fatigue, and Vigor (an estimate of the patient's energy level). The total score is calculated with the equation: (general + physical + emotional + mental) - vigor = total score.

    The range of the vigor scale is 0 to 24, with the higher number meaning more vigor.

    The range of the total score is -24 to 96, with the higher the number meaning more fatigue.


  22. Personal Perceptual Fatigue Measured by Multidimensional Fatigue Symptom Inventory - Subscale Vigor Fatigue After All Doses of Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention ]

    Multidimensional Fatigue Symptom Inventory Short Form (MFSI-SF) from the Moffitt Cancer Center, University of South Florida The MFSI-SF is a 30 question assessment designed to assess the principal manifestations of fatigue.

    There 5 subscales used to calculate a total score. The subscales are: General Fatigue, Physical Fatigue, Emotional Fatigue, Mental Fatigue, and Vigor (an estimate of the patient's energy level). The total score is calculated with the equation: (general + physical + emotional + mental) - vigor = total score.

    The range of the vigor scale is 0 to 24, with the higher number meaning more vigor.

    The range of the total score is -24 to 96, with the higher the number meaning more fatigue.


  23. Personal Perceptual Fatigue Measured by Multidimensional Fatigue Symptom Inventory - Total Score at Baseline [ Time Frame: Baseline ]

    Multidimensional Fatigue Symptom Inventory Short Form (MFSI-SF) from the Moffitt Cancer Center, University of South Florida The MFSI-SF is a 30 question assessment designed to assess the principal manifestations of fatigue.

    There 5 subscales used to calculate a total score. The subscales are: General Fatigue, Physical Fatigue, Emotional Fatigue, Mental Fatigue, and Vigor (an estimate of the patient's energy level). The total score is calculated with the equation: (general + physical + emotional + mental) - vigor = total score.

    The range of the total score is -24 to 96, with the higher the number meaning more fatigue.


  24. Personal Perceptual Fatigue Measured by Multidimensional Fatigue Symptom Inventory - Total Score After All Doses of Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention ]

    Multidimensional Fatigue Symptom Inventory Short Form (MFSI-SF) from the Moffitt Cancer Center, University of South Florida The MFSI-SF is a 30 question assessment designed to assess the principal manifestations of fatigue.

    There 5 subscales used to calculate a total score. The subscales are: General Fatigue, Physical Fatigue, Emotional Fatigue, Mental Fatigue, and Vigor (an estimate of the patient's energy level). The total score is calculated with the equation: (general + physical + emotional + mental) - vigor = total score.

    The range of the total score is -24 to 96, with the higher the number meaning more fatigue.


  25. Global Fatigue Score as Measured by Brief Fatigue Inventory at Baseline [ Time Frame: Baseline ]
    The Brief Fatigue Inventory is a 9 item questionnaire that assesses perceptual fatigue as well as fatigue interferences (e.g. interference with enjoyment of life), with "0" being no fatigue and "10" being as bad as you can imagine. The Global Fatigue score is calculated by averaging the answers of all the questions. Score ranges (0 to 10) with higher score indicating a worse outcome.

  26. Global Fatigue Score as Measured by Brief Fatigue Inventory After Study Invention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention ]
    The Brief Fatigue Inventory is a 9 item questionnaire that assesses perceptual fatigue as well as fatigue interferences (e.g. interference with enjoyment of life), with "0" being no fatigue and "10" being as bad as you can imagine. The Global Fatigue score is calculated by averaging the answers of all the questions. Score range 0 to 10, with a higher score indicating a worse outcome.

  27. Perceptual Fatigue of Non-dominant Arm as Measured by Visual Analog Scale Before Handgrip Fatigue Test at Baseline. [ Time Frame: baseline - before handgrip fatigue test ]

    The Visual Analog Scale for Fatigue is an 11cm long line. The subject is asked to mark their level of fatigue (0cm being no fatigue and 11cm being extreme fatigue). This test was performed before and after the handgrip fatigue test, where the non-dominant hand hold a continuous contraction at 20% of the subjects maximal voluntary contraction for 5 minutes.

    Handgrip testing was performed at baseline (before any intervention) and post dose three of the intervention, average of 17 hours post dose one intervention.


  28. Perceptual Fatigue of Non-dominant Arm as Measured by Visual Analog Scale After Handgrip Fatigue Test at Baseline. [ Time Frame: baseline - directly after handgrip fatigue test ]

    The Visual Analog Scale for Fatigue is an 11cm long line. The subject is asked to mark their level of fatigue (0cm being no fatigue and 11cm being extreme fatigue). This test was performed before and after the handgrip fatigue test, where the non-dominant hand hold a continuous contraction at 20% of the subjects maximal voluntary contraction for 5 minutes.

    Handgrip testing was performed at baseline (before any intervention) and post dose three of the intervention, average of 17 hours post dose one intervention.


  29. Perceptual Fatigue of Non-dominant Arm as Measured by Visual Analog Scale Before Handgrip Fatigue Test After Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention - Before handgrip fatigue test ]

    The Visual Analog Scale for Fatigue is an 11cm long line. The subject is asked to mark their level of fatigue (0cm being no fatigue and 11cm being extreme fatigue). This test was performed before and after the handgrip fatigue test, where the non-dominant hand hold a continuous contraction at 20% of the subjects maximal voluntary contraction for 5 minutes.

    Handgrip testing was performed at baseline (before any intervention) and post dose three of the intervention, average of 17 hours post dose one intervention.


  30. Perceptual Fatigue of Non-dominant Arm as Measured by Visual Analog Scale After Handgrip Fatigue Test After Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention - Directly after handgrip fatigue test ]

    The Visual Analog Scale for Fatigue is an 11cm long line. The subject is asked to mark their level of fatigue (0cm being no fatigue and 11cm being extreme fatigue). This test was performed before and after the handgrip fatigue test, where the non-dominant hand hold a continuous contraction at 20% of the subjects maximal voluntary contraction for 5 minutes.

    Handgrip testing was performed at baseline (before any intervention) and post dose three of the intervention, average of 17 hours post dose one intervention.


  31. Perceptual Fatigue of Whole Body as Measured by Visual Analog Scale Before Handgrip Fatigue Test at Baseline. [ Time Frame: baseline - before handgrip fatigue test ]

    The Visual Analog Scale for Fatigue is an 11cm long line. The subject is asked to mark their level of fatigue (0cm being no fatigue and 11cm being extreme fatigue). This test was performed before and after the handgrip fatigue test, where the non-dominant hand hold a continuous contraction at 20% of the subjects maximal voluntary contraction for 5 minutes.

    Handgrip testing was performed at baseline (before any intervention) and post dose three of the intervention, average of 17 hours post dose one intervention.


  32. Perceptual Fatigue of Whole Body as Measured by Visual Analog Scale After Handgrip Fatigue Test at Baseline. [ Time Frame: baseline - directly after handgrip fatigue test ]

    The Visual Analog Scale for Fatigue is an 11cm long line. The subject is asked to mark their level of fatigue (0cm being no fatigue and 11cm being extreme fatigue). This test was performed before and after the handgrip fatigue test, where the non-dominant hand hold a continuous contraction at 20% of the subjects maximal voluntary contraction for 5 minutes.

    Handgrip testing was performed at baseline (before any intervention) and post dose three of the intervention, average of 17 hours post dose one intervention.


  33. Perceptual Fatigue of Whole Body as Measured by Visual Analog Scale Before Handgrip Fatigue Test After Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention - Before handgrip fatigue test ]

    The Visual Analog Scale for Fatigue is an 11cm long line. The subject is asked to mark their level of fatigue (0cm being no fatigue and 11cm being extreme fatigue). This test was performed before and after the handgrip fatigue test, where the non-dominant hand hold a continuous contraction at 20% of the subjects maximal voluntary contraction for 5 minutes.

    Handgrip testing was performed at baseline (before any intervention) and post dose three of the intervention, average of 17 hours post dose one intervention.


  34. Perceptual Fatigue of Whole Body as Measured by Visual Analog Scale After Handgrip Fatigue Test After Study Intervention [ Time Frame: Post dose three of the intervention, average of 17 hours post dose one intervention - Directly after handgrip fatigue test ]

    The Visual Analog Scale for Fatigue is an 11cm long line. The subject is asked to mark their level of fatigue (0cm being no fatigue and 11cm being extreme fatigue). This test was performed before and after the handgrip fatigue test, where the non-dominant hand hold a continuous contraction at 20% of the subjects maximal voluntary contraction for 5 minutes.

    Handgrip testing was performed at baseline (before any intervention) and post dose three of the intervention, average of 17 hours post dose one intervention.




Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


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Ages Eligible for Study:   60 Years to 85 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  1. Age between 60-85 years.
  2. Ability to sign informed consent.
  3. Ability to sign consent form.
  4. Ability to pass a mini-mental status exam (score >23 on the 30-item Mini Mental State Examination, MMSE).
  5. Free-living, prior to admission.

Exclusion Criteria:

  1. Subjects with cardiac abnormalities considered exclusionary by the study physicians (e.g., unstable angina or a cardiology-confirmed ECG that demonstrates cardiac abnormalities such as > 0.2 mV horizontal or downsloping ST segment depression, frequent arrhythmia's (> 10 PVC/min), or valvular disease).
  2. Subjects with uncontrolled metabolic disease, including liver or renal disease.
  3. Subjects with vascular disease characterized by a combination of risk factors of peripheral atherosclerosis. (e.g., uncontrolled hypertension, obesity, uncontrolled diabetes, hypercholesterolemia > 250 mg/dl, claudication or evidence of venous or arterial insufficiency upon palpitation of femoral, popliteal, and pedal arteries.
  4. Any history of hypo- or hyper-coagulation disorders. (e.g., Coumadin use or history of DVT or PE).
  5. Subjects with chronically elevated systolic pressure >170 or a diastolic blood pressure > 100. Subjects may be included if they are taking medication and have a blood pressure below these criteria.
  6. Subjects with cancer or recently (6 months) treated cancer other than basal cell carcinoma.
  7. Any subject currently on a weight-loss diet or a body mass index > 33 kg/m2.
  8. Inability to abstain from smoking for duration of study.
  9. A history of > 20 pack per year smoking.
  10. Subjects with atrial fibrillation, history of syncope, angina, or congestive heart failure.
  11. Any subject that is HIV-seropositive or has active hepatitis.
  12. Recent anabolic or corticosteroids use (within 3 months).
  13. Subjects with low hemoglobin or hematocrit (i.e., lower than accepted lab values).
  14. Agitation/aggression disorder.
  15. Dementia.
  16. History of stroke with motor disability.
  17. A recent history (<12 months) of GI bleed.
  18. Alcohol (more than 3 drinks per day) or drug abuse.
  19. Polycystic ovary syndrome (PCOS) and/or hyperthecosis.
  20. Non-classical adrenal hyperplasia.
  21. Cushing's syndrome.
  22. Pregnancy.
  23. Hyperprolactinoma, hypothyroidism.
  24. Lactose intolerance.
  25. Subjects with coronary heart or mitral valvular rheumatic heart disease.
  26. Subjects with impaired renal function and/or renal artery stenosis.
  27. Subjects with pulmonary hypertension.
  28. Subjects on any medications known to vasodilate the peripheral arteries.
  29. Subjects taking NSAIDs
  30. Physical dependence or frailty (impairment of activities of daily living, ADLs).
  31. History of falls (>2/year).
  32. Depression (>5 of the 15 items on the Geriatric Depression Scale (GDS).
  33. Subjects suffering malnutrition or with a BMI < 20 kg/m2 with low albumin or transferrin.
  34. Asthma
  35. Any other condition or event considered exclusionary by the PI and covering faculty physician.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01384591


Locations
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United States, Texas
University of Texas Medical Branch
Galveston, Texas, United States, 77555
Sponsors and Collaborators
The University of Texas Medical Branch, Galveston
Lantheus Medical Imaging
Investigators
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Principal Investigator: Melinda Sheffield-Moore, PhD UTMB
Study Director: Astrid M Horstman, PhD UTMB

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Responsible Party: The University of Texas Medical Branch, Galveston
ClinicalTrials.gov Identifier: NCT01384591    
Other Study ID Numbers: 11-091
First Posted: June 29, 2011    Key Record Dates
Results First Posted: May 8, 2018
Last Update Posted: May 8, 2018
Last Verified: April 2018
Keywords provided by The University of Texas Medical Branch, Galveston:
oxidative stress
blood flow
antioxidant
muscle
elderly
Additional relevant MeSH terms:
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Acetylcysteine
Losartan
N-monoacetylcystine
Anti-Arrhythmia Agents
Antihypertensive Agents
Angiotensin II Type 1 Receptor Blockers
Angiotensin Receptor Antagonists
Molecular Mechanisms of Pharmacological Action
Antiviral Agents
Anti-Infective Agents
Expectorants
Respiratory System Agents
Free Radical Scavengers
Antioxidants
Protective Agents
Physiological Effects of Drugs
Antidotes