OsteoarthritisNCT00760383
Muscle Regrowth During Physical Rehabilitation and Amino Acid Supplementation
A study testing Essential amino acids and Alanine in people with Osteoarthritis, run by University of Oregon at 2 sites in United States.
Trial summary
The general hypothesis is that in older adults muscle regrowth after an acute musculoskeletal stress will be positively influenced by traditional physical rehabilitation, and further enhanced by nutritional supplementation. Read more about this study
- Who is it for?
- Ages 60 to 80 yearsHealthy volunteers can take part
- Conditions the study is for
- Osteoarthritis
- What is being tested?
- Essential amino acids and Alanine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 60 participants
- Where
- 2 sitesUnited States
- Study dates
- Jun 2008to Dec 2013
- Phase
- Interventional
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 60 to 80 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Total Knee Arthroplasty surgical candidate
Who cannot join
- Overt muscle disease
Trial locations and contacts
2 sites in 1 country.
United States2 sites
University of Oregon
Eugene, Oregon, 97401-1240
Slocum Center for Orthopedics and Sports Medicine
Eugene, Oregon, 97401
About this study
The general hypothesis is that in older adults muscle regrowth after an acute musculoskeletal stress will be positively influenced by traditional physical rehabilitation, and further enhanced by nutritional supplementation. Using state-of-the-art stable isotope methodologies for the study of muscle metabolism and methodologies for the measurement of cell signaling, we will test the following specific hypotheses: 1) Total knee arthroplasty (TKA) induces an acute net protein catabolism mainly by reducing muscle protein synthesis; 2) TKA induced catabolism is attenuated by the ingestion of essential amino acids (EAA); 3) EAA supplementation in combination with physical therapy (PT) will stimulate muscle protein synthesis and mTOR signaling to a greater extent than PT with Placebo; and 4) EAA supplementation during TKA PT rehabilitation will improve muscle strength, muscle volume and functional outcomes to a greater extent than PT with Placebo.
Public Benefit: This research will focus rehabilitation efforts on specific and currently unresolved mechanisms responsible for muscle loss following total knee replacement in older adults. While knee pain due to bone arthritis is often alleviated after knee replacement, complete return of physical function and independence is difficult to achieve. This research will help to restore physical function and independence in the rapidly growing population of older adults with knee arthritis.
Read the detailed description
The goal of this translational research project is to identify key mechanisms involved in regulating skeletal muscle loss and regrowth following total knee arthroplasty (TKA). Total knee arthroplasty induces significant declines in muscle mass and strength, which is directly responsible for reduced function, specifically functional independence. Such declines in muscle strength and volume and activities of daily living (getting up from a chair, climbing stairs and walking) can persist for up to 2 years.
Atrophy is the direct result of an imbalance between muscle protein synthesis and breakdown. However, there are two quite distinct mechanisms leading to muscle loss: accelerated protein breakdown (e.g. burn injury), primarily resulting from the stress response, or decreased protein synthesis (e.g., immobilization). In case of severe stress, muscle protein synthesis actually increases, although not adequately to impede muscle loss, and anabolic stimuli, such as nutrition, cannot counteract muscle atrophy. On the other hand, decreased protein synthesis from inactivity can be stimulated by nutrition and exercise, thereby reducing or preventing atrophy. Currently, we do not know which condition predominates following TKA: surgical stress-induced catabolism or immobility-associated declines in synthesis . What is not known is which signaling pathway predominates following TKA; stress induced catabolism or immobility associated declines in synthesis. Our goal is to determine which model (stress or inactivity) accounts for the acute and rapid muscle loss following TKA in order to better focus rehabilitation efforts.
Our general hypothesis is that quadriceps atrophy following TKA surgery is primarily due to inactivity, which can be counteracted by physical therapy (PT) and essential amino acid (EAA) supplementation. Our goal is to delineate the basic mechanisms underlying muscle loss with TKA, and based on this new information, to find novel rehabilitation strategies to accelerate recovery of normal function from TKA.
Thus, our plan is to test in older adults the following specific hypothesis:
- TKA induces an acute and severe net protein catabolism by reducing muscle protein synthesis
- TKA induced catabolism is attenuated with the ingestion of EAA
- EAA supplementation following PT will stimulate muscle protein synthesis and mTOR signaling to a greater extent than PT with Placebo
- EAA supplementation during TKA PT rehabilitation will improve muscle strength, muscle volume and functional outcomes to a greater extent than PT with Placebo
To test our specific hypothesis we will address the following specific aims:
- To determine if TKA surgery reduces muscle protein synthesis and/or increases muscle protein breakdown
- To determine if muscle protein synthesis is acutely increased with the ingestion of EAA following TKA surgery
- To determine if muscle protein synthesis and mTOR signaling will be stimulated by PT rehabilitation and enhanced by EAA supplementation
- To determine if EAA supplementation during TKA with traditional PT for 6 weeks improves muscle strength, muscle volume and functional outcomes This application will provide preliminary data for the submission of an R01 grant to further determine the mechanisms leading to successful return of quadriceps muscle strength and function following TKA. Essential amino acids are inexpensive, well tolerated and easily digestible and have been shown to independently stimulate muscle protein synthesis and components of the anabolic mTOR signaling pathway. My goal of increasing muscle strength and functional mobility is specifically outlined in the National Center for Medical Rehabilitation Research Seven Priority Areas and are in line with the NIH roadmap and priorities, and will help us to understand muscle protein metabolism during physical therapy rehabilitation. By adopting a mechanism-driven, translational research design that links changes in cell signaling with functional outcome measures (cell → system → function) we will capture key physiological events responsible for the regulation of muscle mass and function following TKA.
- Conditions
- Osteoarthritis
- Being tested
- Essential amino acids, Alanine
- Keywords
- Total Knee Arthroplasty, Osteoarthritis, Muscle Metabolism, Rehabilitation, Physical Therapy
- Medical subject headings
- Osteoarthritis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Essential amino acidsDietary supplement
Also called Histidine, Isoleucine, Leucine, Lysine
Subjects will ingest 20 grams of essential amino acids (EAA) daily for 7 days prior to total knee arthroplasty (TKA) surgery and for 14 days after surgery daily. On the days they are seen by physical therapy (PT) they will ingest the EAA supplement 30 minutes after the end of each PT rehabilitation session.
AlanineDietary supplement
Subjects will ingest 20 grams of non-essential amino acid (NEAA) daily for 7 days prior to total knee arthroplasty (TKA) surgery and for 14 days after surgery daily. On the days they are seen by physical therapy (PT) they will ingest the NEAA supplement 30 minutes after the end of each PT rehabilitation session.
| Study group | Role | What they receive |
|---|---|---|
| EAA+PT | Experimental | 20 g EAA daily for 7 days prior to TKA surgery and for 14 days after surgery. Receives: Dietary Supplement: Essential amino acids |
| ALA+PT | Placebo comparator | 20 g NEAA daily for 7 days prior to TKA surgery and for 14 days after surgery. Receives: Dietary Supplement: Alanine |
What is being measured
The primary outcome is the main question the study is designed to answer.
Stair Time up
Measured: 6 weeks
Quadriceps Muscle Strength
Measured: 6 weeks
Secondary outcomes (1)
Mid-thigh Muscle Volume
Analysis was performed using the Analyze 11 software package with semi-automated delineation of quadriceps, hamstrings, and adductors boarders. Using thresholding methods, the software can differentiate operator-delineated parameters set to distinguish muscle from non-muscle (i.e., adipose tissue) using voxel intensity within each border region for quantitative determination of muscle volume.
Measured: 6 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted26 Sep 2008 (estimated)
- Study startJun 2008
- Primary completionDec 2013
- Study completionDec 2013
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (9)Papers the sponsor has linked to this study.
- Other trials for OsteoarthritisStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Investigator
- Enrolment
- 60 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Oregon
- Sponsor type
- University, hospital or other
- Collaborators
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- Responsible party
- Principal investigator, Hans Dreyer, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- Investigators
- Hans C Dreyer, PT, PhD, Principal investigator, Assistant Professor, Department of Human Physiology
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00760383
- Sponsor's protocol ID
- 1K01HD057332
- Other IDs
- 1K01HD057332
- Status last verified
- Dec 2014
- First submitted
- 25 Sep 2008
- Last updated
- 4 Dec 2014
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
Publications
Dreyer HC, Drummond MJ, Pennings B, Fujita S, Glynn EL, Chinkes DL, Dhanani S, Volpi E, Rasmussen BB. Leucine-enriched essential amino acid and carbohydrate ingestion following resistance exercise enhances mTOR signaling and protein synthesis in human muscle. Am J Physiol Endocrinol Metab. 2008 Feb;294(2):E392-400. doi: 10.1152/ajpendo.00582.2007. Epub 2007 Dec 4.
PubMed 18056791Fujita S, Dreyer HC, Drummond MJ, Glynn EL, Cadenas JG, Yoshizawa F, Volpi E, Rasmussen BB. Nutrient signalling in the regulation of human muscle protein synthesis. J Physiol. 2007 Jul 15;582(Pt 2):813-23. doi: 10.1113/jphysiol.2007.134593. Epub 2007 May 3.
PubMed 17478528Dreyer HC, Fujita S, Cadenas JG, Chinkes DL, Volpi E, Rasmussen BB. Resistance exercise increases AMPK activity and reduces 4E-BP1 phosphorylation and protein synthesis in human skeletal muscle. J Physiol. 2006 Oct 15;576(Pt 2):613-24. doi: 10.1113/jphysiol.2006.113175. Epub 2006 Jul 27.
PubMed 16873412Fujita S, Dreyer HC, Drummond MJ, Glynn EL, Volpi E, Rasmussen BB. Essential amino acid and carbohydrate ingestion before resistance exercise does not enhance postexercise muscle protein synthesis. J Appl Physiol (1985). 2009 May;106(5):1730-9. doi: 10.1152/japplphysiol.90395.2008. Epub 2008 Jun 5.
PubMed 18535123Drummond MJ, Dreyer HC, Pennings B, Fry CS, Dhanani S, Dillon EL, Sheffield-Moore M, Volpi E, Rasmussen BB. Skeletal muscle protein anabolic response to resistance exercise and essential amino acids is delayed with aging. J Appl Physiol (1985). 2008 May;104(5):1452-61. doi: 10.1152/japplphysiol.00021.2008. Epub 2008 Mar 6.
PubMed 18323467Dreyer HC, Blanco CE, Sattler FR, Schroeder ET, Wiswell RA. Satellite cell numbers in young and older men 24 hours after eccentric exercise. Muscle Nerve. 2006 Feb;33(2):242-53. doi: 10.1002/mus.20461.
PubMed 16315322Dreyer HC, Volpi E. Role of protein and amino acids in the pathophysiology and treatment of sarcopenia. J Am Coll Nutr. 2005 Apr;24(2):140S-145S. doi: 10.1080/07315724.2005.10719455.
PubMed 15798081Ratchford SM, Bailey AN, Senesac HA, Hocker AD, Smolkowski K, Lantz BA, Jewett BA, Gilbert JS, Dreyer HC. Proteins regulating cap-dependent translation are downregulated during total knee arthroplasty. Am J Physiol Regul Integr Comp Physiol. 2012 Mar 15;302(6):R702-11. doi: 10.1152/ajpregu.00601.2011. Epub 2011 Dec 28.
PubMed 22204954Dreyer HC, Strycker LA, Senesac HA, Hocker AD, Smolkowski K, Shah SN, Jewett BA. Essential amino acid supplementation in patients following total knee arthroplasty. J Clin Invest. 2013 Nov;123(11):4654-66. doi: 10.1172/JCI70160. Epub 2013 Oct 25.
PubMed 24135139
Study at a glance
From the registry record, last updated by the sponsor on 4 Dec 2014. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Muscle Regrowth During Physical Rehabilitation and Amino Acid Supplementation
- ClinicalTrials.gov ID
- NCT00760383
- Acronym / sponsor ID
- 1K01HD057332
- Conditions
- Osteoarthritis
- Keywords
- Total Knee Arthroplasty, Osteoarthritis, Muscle Metabolism, Rehabilitation, Physical Therapy
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 60 participants (actual)
- Lead sponsor
- University of OregonUniversity, hospital or other
- Collaborators
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- Study start
- Jun 2008
- Primary completion
- Dec 2013 (actual)
- Study completion
- Dec 2013 (actual)
- First posted
- 26 Sep 2008 (estimated)
- Results
- Posted 4 Dec 2014
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The general hypothesis is that in older adults muscle regrowth after an acute musculoskeletal stress will be positively influenced by traditional physical rehabilitation, and further enhanced by nutritional supplementation. Using state-of-the-art stable isotope methodologies for the study of muscle metabolism and methodologies for the measurement of cell signaling, we will test the following specific hypotheses: 1) Total knee arthroplasty (TKA) induces an acute net protein catabolism mainly by reducing muscle protein synthesis; 2) TKA induced catabolism is attenuated by the ingestion of essential amino acids (EAA); 3) EAA supplementation in combination with physical therapy (PT) will stimulate muscle protein synthesis and mTOR signaling to a greater extent than PT with Placebo; and 4) EAA supplementation during TKA PT rehabilitation will improve muscle strength, muscle volume and functional outcomes to a greater extent than PT with Placebo.
Public Benefit: This research will focus rehabilitation efforts on specific and currently unresolved mechanisms responsible for muscle loss following total knee replacement in older adults. While knee pain due to bone arthritis is often alleviated after knee replacement, complete return of physical function and independence is difficult to achieve. This research will help to restore physical function and independence in the rapidly growing population of older adults with knee arthritis.
Detailed description
The goal of this translational research project is to identify key mechanisms involved in regulating skeletal muscle loss and regrowth following total knee arthroplasty (TKA). Total knee arthroplasty induces significant declines in muscle mass and strength, which is directly responsible for reduced function, specifically functional independence. Such declines in muscle strength and volume and activities of daily living (getting up from a chair, climbing stairs and walking) can persist for up to 2 years.
Atrophy is the direct result of an imbalance between muscle protein synthesis and breakdown. However, there are two quite distinct mechanisms leading to muscle loss: accelerated protein breakdown (e.g. burn injury), primarily resulting from the stress response, or decreased protein synthesis (e.g., immobilization). In case of severe stress, muscle protein synthesis actually increases, although not adequately to impede muscle loss, and anabolic stimuli, such as nutrition, cannot counteract muscle atrophy. On the other hand, decreased protein synthesis from inactivity can be stimulated by nutrition and exercise, thereby reducing or preventing atrophy. Currently, we do not know which condition predominates following TKA: surgical stress-induced catabolism or immobility-associated declines in synthesis . What is not known is which signaling pathway predominates following TKA; stress induced catabolism or immobility associated declines in synthesis. Our goal is to determine which model (stress or inactivity) accounts for the acute and rapid muscle loss following TKA in order to better focus rehabilitation efforts.
Our general hypothesis is that quadriceps atrophy following TKA surgery is primarily due to inactivity, which can be counteracted by physical therapy (PT) and essential amino acid (EAA) supplementation. Our goal is to delineate the basic mechanisms underlying muscle loss with TKA, and based on this new information, to find novel rehabilitation strategies to accelerate recovery of normal function from TKA.
Thus, our plan is to test in older adults the following specific hypothesis:
- TKA induces an acute and severe net protein catabolism by reducing muscle protein synthesis
- TKA induced catabolism is attenuated with the ingestion of EAA
- EAA supplementation following PT will stimulate muscle protein synthesis and mTOR signaling to a greater extent than PT with Placebo
- EAA supplementation during TKA PT rehabilitation will improve muscle strength, muscle volume and functional outcomes to a greater extent than PT with Placebo
To test our specific hypothesis we will address the following specific aims:
- To determine if TKA surgery reduces muscle protein synthesis and/or increases muscle protein breakdown
- To determine if muscle protein synthesis is acutely increased with the ingestion of EAA following TKA surgery
- To determine if muscle protein synthesis and mTOR signaling will be stimulated by PT rehabilitation and enhanced by EAA supplementation
- To determine if EAA supplementation during TKA with traditional PT for 6 weeks improves muscle strength, muscle volume and functional outcomes This application will provide preliminary data for the submission of an R01 grant to further determine the mechanisms leading to successful return of quadriceps muscle strength and function following TKA. Essential amino acids are inexpensive, well tolerated and easily digestible and have been shown to independently stimulate muscle protein synthesis and components of the anabolic mTOR signaling pathway. My goal of increasing muscle strength and functional mobility is specifically outlined in the National Center for Medical Rehabilitation Research Seven Priority Areas and are in line with the NIH roadmap and priorities, and will help us to understand muscle protein metabolism during physical therapy rehabilitation. By adopting a mechanism-driven, translational research design that links changes in cell signaling with functional outcome measures (cell → system → function) we will capture key physiological events responsible for the regulation of muscle mass and function following TKA.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, investigator)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| EAA+PT | Experimental | Dietary Supplement: Essential amino acids20 g EAA daily for 7 days prior to TKA surgery and for 14 days after surgery. |
| ALA+PT | Placebo comparator | Dietary Supplement: Alanine20 g NEAA daily for 7 days prior to TKA surgery and for 14 days after surgery. |
Who may qualify
- Ages
- 60 to 80 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- Total Knee Arthroplasty surgical candidate
Key exclusion criteria (1 listed)
- Overt muscle disease
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Essential amino acidsAlso: Histidine, Isoleucine, Leucine, LysineSubjects will ingest 20 grams of essential amino acids (EAA) daily for 7 days prior to total knee arthroplasty (TKA) surgery and for 14 days after surgery daily. On the days they are seen by physical therapy (PT) they will ingest the EAA supplement 30 minutes after the end of each PT rehabilitation session. | Dietary supplement | EAA+PT |
| AlanineSubjects will ingest 20 grams of non-essential amino acid (NEAA) daily for 7 days prior to total knee arthroplasty (TKA) surgery and for 14 days after surgery daily. On the days they are seen by physical therapy (PT) they will ingest the NEAA supplement 30 minutes after the end of each PT rehabilitation session. | Dietary supplement | ALA+PT |
Primary outcome
Stair Time up
Time frame: 6 weeks
Quadriceps Muscle Strength
Time frame: 6 weeks
1 secondary outcome
Mid-thigh Muscle Volume
Time frame: 6 weeks
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 4 Dec 2014.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Background: PubMed 18056791Dreyer HC, Drummond MJ, Pennings B, Fujita S, Glynn EL, Chinkes DL, Dhanani S, Volpi E, Rasmussen BB. Leucine-enriched essential amino acid and carbohydrate ingestion following resistance exercise enhances mTOR signaling and protein synthesis in human muscle. Am J Physiol Endocrinol Metab. 2008 Feb;294(2):E392-400. doi: 10.1152/ajpendo.00582.2007. Epub 2007 Dec 4.
- Background: PubMed 17478528Fujita S, Dreyer HC, Drummond MJ, Glynn EL, Cadenas JG, Yoshizawa F, Volpi E, Rasmussen BB. Nutrient signalling in the regulation of human muscle protein synthesis. J Physiol. 2007 Jul 15;582(Pt 2):813-23. doi: 10.1113/jphysiol.2007.134593. Epub 2007 May 3.
- Background: PubMed 16873412Dreyer HC, Fujita S, Cadenas JG, Chinkes DL, Volpi E, Rasmussen BB. Resistance exercise increases AMPK activity and reduces 4E-BP1 phosphorylation and protein synthesis in human skeletal muscle. J Physiol. 2006 Oct 15;576(Pt 2):613-24. doi: 10.1113/jphysiol.2006.113175. Epub 2006 Jul 27.
- Background: PubMed 18535123Fujita S, Dreyer HC, Drummond MJ, Glynn EL, Volpi E, Rasmussen BB. Essential amino acid and carbohydrate ingestion before resistance exercise does not enhance postexercise muscle protein synthesis. J Appl Physiol (1985). 2009 May;106(5):1730-9. doi: 10.1152/japplphysiol.90395.2008. Epub 2008 Jun 5.
- Background: PubMed 18323467Drummond MJ, Dreyer HC, Pennings B, Fry CS, Dhanani S, Dillon EL, Sheffield-Moore M, Volpi E, Rasmussen BB. Skeletal muscle protein anabolic response to resistance exercise and essential amino acids is delayed with aging. J Appl Physiol (1985). 2008 May;104(5):1452-61. doi: 10.1152/japplphysiol.00021.2008. Epub 2008 Mar 6.
- Background: PubMed 16315322Dreyer HC, Blanco CE, Sattler FR, Schroeder ET, Wiswell RA. Satellite cell numbers in young and older men 24 hours after eccentric exercise. Muscle Nerve. 2006 Feb;33(2):242-53. doi: 10.1002/mus.20461.
- Background: PubMed 15798081Dreyer HC, Volpi E. Role of protein and amino acids in the pathophysiology and treatment of sarcopenia. J Am Coll Nutr. 2005 Apr;24(2):140S-145S. doi: 10.1080/07315724.2005.10719455.
- Results publication: PubMed 22204954Ratchford SM, Bailey AN, Senesac HA, Hocker AD, Smolkowski K, Lantz BA, Jewett BA, Gilbert JS, Dreyer HC. Proteins regulating cap-dependent translation are downregulated during total knee arthroplasty. Am J Physiol Regul Integr Comp Physiol. 2012 Mar 15;302(6):R702-11. doi: 10.1152/ajpregu.00601.2011. Epub 2011 Dec 28.
- Derived from this study: PubMed 24135139Dreyer HC, Strycker LA, Senesac HA, Hocker AD, Smolkowski K, Shah SN, Jewett BA. Essential amino acid supplementation in patients following total knee arthroplasty. J Clin Invest. 2013 Nov;123(11):4654-66. doi: 10.1172/JCI70160. Epub 2013 Oct 25.
- Clinical and translational research on skeletal muscle physiology before, during and after total knee arthroplasty (TKA) surgeryLink provided by the sponsor.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Hans C Dreyer, PT, PhD principal investigator
Assistant Professor, Department of Human Physiology
2 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Essential amino acids and Alanine in people with Osteoarthritis, run by University of Oregon at 2 sites in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 4 Dec 2014. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 2 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Yes. Results are posted in the registry (first posted 4 Dec 2014). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Stair Time up (time frame: 6 weeks). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00760383, which also lists 9 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Dec 2014.