Working…
ClinicalTrials.gov
ClinicalTrials.gov Menu

Dietary Nitrate and Muscle Power With Aging

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. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT03513302
Recruitment Status : Recruiting
First Posted : May 1, 2018
Last Update Posted : March 7, 2019
Sponsor:
Information provided by (Responsible Party):
Andrew R. Coggan, Indiana University

Brief Summary:
The purpose of this study is to see if drinking beetroot juice (BRJ) is beneficial for aging patients. We hope to determine the effect of BRJ on exercise performance. BRJ improves exercise performance in athletes and normal people. We are trying to determine if BRJ improves exercise performance in aging patients. We will be comparing the effects of BRJ versus the effects of a placebo (BRJ without the nitrates that are naturally occurring in beets and other similar foods). It is thought that the benefits of BRJ may come from its natural nitrate content. Although BRJ is available for purchase in grocery stores, for the purposes of this study it is considered investigational, which means that it has not been approved as a medical therapy.

Condition or disease Intervention/treatment Phase
Aging Sarcopenia Dietary Supplement: placebo Dietary Supplement: nitrate Phase 1

  Hide Detailed Description

Detailed Description:

This study consists of two parts separated by a 14 day wash-out. Subjects will be randomly assigned to receive either the BRJ or placebo during the first part. During the second part they will receive the opposite of what they had during the first part. This is considered a double-blind study, which means neither the subjects nor the investigators will know what form (BRJ or placebo) a subject is receives.

Study Visit One (Screening) 1-2 hours

The purpose of the screening visit is to explain all aspects of the study. It will also determine if subjects can participate in the study. Subjects will provide a complete medical history and undergo a physical exam. They will have their blood drawn (about 1.5 teaspoons) and provide a urine sample. They will also practice the entire neuromuscular function exercise test. During this test, the strength of their muscles will be determined by having them kick, push and/or pull back as hard as you can while their leg is strapped to an exercise device. A vital signs monitor will measure your blood pressure, heart rate, and rhythm.

During the remainder of the study subjects will be instructed to consume their normal diet. However, they will be asked to avoid eating foods high in nitrate such as beets, spinach, and collard greens the evening before each visit. They will be asked to refrain from the use of antibacterial mouthwash, such as Listerine or Cepacol, during the study. Chewing gum, alcohol, and food and drinks containing caffeine (coffee, tea, chocolate, and soft drinks) should be avoided 24 hours prior to each visit. They will be asked to fast for 12 hour prior to each study visit.

Study Visit Two - Approximately 5 hours

At the beginning of this visit a catheter (small, flexible, sterile plastic tube) will be placed through a vein in one of the subject's arms. This is for collection of blood samples. Blood will be drawn four times during this visit. Each draw will be 6 mL or about 1.2 teaspoons. The first blood draw will check nitrate and nitrite levels. They will then have a breath test to check nitric oxide. They will then drink 140 mL (about 2/3 of a cup) of BRJ (or placebo). Blood and breath samples will be obtained every hour. Heart rate and blood pressure will be measured at the same times the blood and breath samples are obtained. Subjects will then rest quietly in a private room for about 2 hours after ingestion of BRJ (or placebo) then will perform:

  • The neuromuscular function test that was practiced during the screening visit.
  • After completing the exercise test they will undergo a muscle biopsy of their thigh muscle. First, the area will be sterilized and numbed with an injection. Next, a small incision (about ¼ inch) will be made and a small biopsy needle will be used to collect a small sample of your muscle (about the size of a pencil eraser). This will be performed on the leg opposite of that used during the neuromuscular test.
  • One final blood and breath sample will then be obtained.
  • Subjects will then be provided a 7 day supply of BRJ (or placebo) and will continue to drink two bottles (about 5 oz) every morning.
  • Subjects will also be provided with an activity tracker. This will be worn at the hip during all waking hours except when bathing or swimming. This monitor will measure total activity time and sedentary time.

Study Visit Three - 1-2 hours

Subjects will return to the research center with the empty BRJ bottles. At this visit a single blood (1.2 teaspoon) and breath sample will be collected. Subjects will then complete a questionnaire to rate how tired they felt during the previous week. They will be provided another 7 day supply of BRJ (or placebo) and will continue to drink two bottles every morning.

Study Visit Four - Approximately 5 hours Subjects will return to the research center and undergo the same procedures as they did in Study Visit Two. They will also complete a questionnaire that will rate how tired they felt during the previous week.

Washout After visit four subjects will undergo a 14 day washout period where they will not drink the BRJ (or placebo). There are no dietary restrictions at this time; subjects may consume caffeine, alcohol, gum, mouthwash, etc. Subjects will then repeat Study Visits Two, Three, and Four again. However, during this they will be given the opposite form of BRJ you had received before.

Study Visit Five Subjects will repeat the procedures completed during Study Visit Two.

Study Visit Six Subjects will repeat the procedures completed during Study Visit Three.

Study Visit Seven Subjects will repeat the procedures completed during Study Visit Four.


Layout table for study information
Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 20 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Intervention Model Description: Double-blind, placebo-controlled, crossover
Masking: Triple (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Dietary Nitrate and Muscle Power With Aging
Actual Study Start Date : March 1, 2019
Estimated Primary Completion Date : August 30, 2020
Estimated Study Completion Date : August 30, 2020

Arm Intervention/treatment
Placebo Comparator: placebo Dietary Supplement: placebo
2 x 70 mL concentrated beet root juice depleted of nitrate per day for 14 days.
Other Name: Beet It Sport Nitrate 400 placebo

Active Comparator: nitrate Dietary Supplement: nitrate
2 x 70 mL concentrated beet root juice per day for 14 days.
Other Name: Beet It Sport Nitrate 400




Primary Outcome Measures :
  1. Muscle function [ Time Frame: 1 day ]
    Maximal knee extensor speed and power determined using isokinetic dynamometry

  2. Muscle function [ Time Frame: 14 days ]
    Maximal knee extensor speed and power determined using isokinetic dynamometry


Secondary Outcome Measures :
  1. Muscle cGMP [ Time Frame: 1 day ]
    Muscle cyclic guanosine monophosphate concentration

  2. Muscle cGMP [ Time Frame: 14 days ]
    Muscle cyclic guanosine monophosphate concentration


Other Outcome Measures:
  1. Plasma nitrate [ Time Frame: 0,1,2,3 hours after treatment at 1 and 14 days ]
    Plasma nitrate concentrations

  2. Plasma nitrite [ Time Frame: 0,1,2,3 hours after treatment at 1 and 14 days ]
    Plasma nitrite concentrations

  3. Breath nitric oxide [ Time Frame: 0,1,2,3 hours after treatment at 1 and 14 days ]
    Breath nitric oxide level

  4. Perceived fatigue [ Time Frame: 1,7,14 days of treatment ]
    Perceived fatigue questionnaire (PROMIS 8a)

  5. Physical function [ Time Frame: 1,7,14 days of treatment ]
    Physical function questionnaire (PROMIS 20a)

  6. Physical activity [ Time Frame: 1,7,14 days of treatment ]
    Physical activity (total and bouted) from ActiGraph monitors



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.


Layout table for eligibility information
Ages Eligible for Study:   65 Years to 79 Years   (Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

In good health, as determined by the investigator's review of history (provided by subject at screening visit), physical examination, and routine blood and urine tests (done at screening visit)

Exclusion Criteria:

Men and women <65 or >79 years of age

  • Unable to provide informed consent
  • Currently pregnant or lactating (given the age range for the study, verbal confirmation by subject is believed to be sufficient)
  • Current smokers
  • Significant orthopedic limitations or other contraindications to strenuous exercise
  • Those taking phosphodiesterase inhibitors (e.g., Viagra)
  • Those taking proton pump inhibitors, antacids, xanthine oxidase inhibitors, or on hormone replacement therapy
  • Those taking anti-coagulants (e.g., Coumadin) or on anti-platelet therapy
  • History of neuromuscular disease (e.g., cervical spondylotic radiculomyelpathy, lumbar spondylosis, amyotrophic lateral sclerosis, Guillain-Barré syndrome, and acquired demyelinating polyneuropathies), cardiovascular disease (e.g., > stage I hypertension, heart failure, myocardial infarction/ischemia, significant myocardial or pericardial diseases (e.g. amyloidosis, constriction), moderate or severe valvular disease, renal disease, liver disease, or anemia

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): NCT03513302


Contacts
Layout table for location contacts
Contact: Richard L Hoffman, MS 3172740648 richoffm@iu.edu

Locations
Layout table for location information
United States, Indiana
Indiana University School of Health and Human Sciences Recruiting
Indianapolis, Indiana, United States, 46202
Contact: Richard L Hoffman, MS    317-274-0648    richoffm@iu.edu   
Sponsors and Collaborators
Indiana University
Investigators
Layout table for investigator information
Principal Investigator: Andrew Coggan, PhD Indiana University School of Medicine

Publications:

Layout table for additonal information
Responsible Party: Andrew R. Coggan, Associate Professor, Indiana University
ClinicalTrials.gov Identifier: NCT03513302     History of Changes
Other Study ID Numbers: 1712579448
First Posted: May 1, 2018    Key Record Dates
Last Update Posted: March 7, 2019
Last Verified: March 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Layout table for additional information
Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Product Manufactured in and Exported from the U.S.: No
Keywords provided by Andrew R. Coggan, Indiana University:
nitric oxide
Additional relevant MeSH terms:
Layout table for MeSH terms
Sarcopenia
Muscular Atrophy
Neuromuscular Manifestations
Neurologic Manifestations
Nervous System Diseases
Atrophy
Pathological Conditions, Anatomical
Signs and Symptoms