Non-invasive Molecular Imaging of Muscle Structure (MSOT_muscles)
Study Details
Study Description
Brief Summary
This study aims to determine hemoglobin and collagen levels in muscles before and after exercise, and over time, using Multispectral Optoacoustic Tomography (MSOT). During MSOT, a transducer is placed on the skin similar to a conventional sonography and instead of sound, energy is supplied to the tissue by means of light flashes. This leads to a constant change of minimal expansions and contractions (thermoelastic expansion) of individual tissue constituents or molecules. The resulting sound waves can then be detected by the same examination unit.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
N/A |
Detailed Description
Duchenne muscular dystrophy (DMD) is one of the most common progressive childhood muscle diseases with an incidence of 1 in 3500 male newborns and is associated primarily with decreased life expectancy. Pathogenetically, there is a deficiency of dystrophin, a structural protein of the sarcolemma, which is caused by mutations (usually deletions) of the dystrophin gene (Xp21.3-p21.2). The result of dystrophin deficiency is a necrosis of muscle cells that are replaced by connective tissue and adipose tissue. Clinical scores (6-minute walk test, 6MWT) and MRI studies to characterize the degenerative changes of skeletal muscle in the early stages are available for the quantitative assessment of the disease progression as well as therapy effects, the significance of which is controversially discussed. However, the highly sensitive assessment of gene therapy effects will become increasingly important in the future. Sensitive, non-invasive methods for the detection of early muscle degeneration and muscle function in the course are of great clinical and scientific importance.
MSOT has already been demonstrated to be a potential monitoring tool in different diseases. However, it has not yet been investigated to what extent 1) previous physical activity 2) different measuring ranges at the muscle, 3) longitudinal measurements and 4) intra- and interoperative variability influences the measured results. In particular, molecular changes immediately after the 6-MWT are relevant for studies in patients with DMD.
In this first pilot study, the investigators want to investigate in healthy adults, whether increased exercise changes the hemoglobin values, whether the collagen content remains constant and whether repeated measurements at different muscle positions by different investigators provide consistent results over time. This information is indispensable for future studies of children with muscular diseases in order to be able to make statements about disease progression or even therapy response.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: Healthy Volunteers Multispectral Optoacoustic Tomography (MSOT) of proximal and distal leg muscles (total of 12 sites: left and right, 3 measurement points of Musculus quadriceps, and 3 measurement points of Musculus triceps surae) before and after the 6-Minute-Walk-Test by to independent investigators. Repetition of the same protocol after 14 days. |
Device: Multispectral Optoacoustic Tomography
Non-invasive transcutaneous imaging of subcellular muscle components
|
Outcome Measures
Primary Outcome Measures
- Muscular collagen content [one time point ( 2 measurements on day 1)]
Quantitative collagen signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in muscles of healthy volunteers compared before and after 6-MWT.
- Muscular myo-/hemoglobin content [one time point ( 2 measurements on day 1)]
Quantitative myo-/hemoglobin signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in muscles of healthy volunteers compared before and after 6-MWT.
Secondary Outcome Measures
- Muscular oxygenated and deoxygenated myo-/hemoglobin content [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative oxygenated and deoxygenated myo-/hemoglobin signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in muscles of healthy volunteers compared before and after 6-MWT and after 14 days.
- Intraindividual collagen content [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative collagen signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) compared between three different points in one muscle of one healthy volunteer
- Intraindividual myo-/hemoglobin content [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative myo-/hemoglobin signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) compared between three different points in one muscle of one healthy volunteer
- Intraindividual oxygenated and deoxygenated myo-/hemoglobin content [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative oxygenated and deoxygenated myo-/hemoglobin signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) compared between three different points in one muscle of one healthy volunteer
- Muscular collagen content in men and women [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative collagen signal of muscles derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in healthy men compared to healthy women.
- Muscular myo-/hemoglobin content in men and women [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative myo-/hemoglobin signal of muscles derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in healthy men compared to healthy women.
- Muscular oxygenated and deoxygenated myo-/hemoglobin content in men and women [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative oxygenated and deoxygenated myo-/hemoglobin signal of muscles derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in healthy men compared to healthy women.
- Correlation of collagen signal with the 6-MWT [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative collagen signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in Healthy volunteers before and after exercise correlated with the 6-MWT
- Correlation of myo-/hemoglobin signal with the 6-MWT [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative myo-/hemoglobin signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in Healthy volunteers before and after exercise correlated with the 6-MWT
- Correlation of oxygenated and deoxygenated myo-/hemoglobin signal with the 6-MWT [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative oxygenated and deoxygenated myo-/hemoglobin signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in Healthy volunteers before and after exercise correlated with the 6-MWT
- Interrater reliability of collagen content [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative collagen signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in muscles of healthy volunteers before and after 6-MWT and after 14 days compared between to investigators
- Interrater reliability of myo-/hemoglobin content [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative myo-/hemoglobin signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in muscles of healthy volunteers before and after 6-MWT and after 14 days compared between to investigators
- Interrater reliability of oxygenated and deoxygenated myo-/hemoglobin content [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative oxygenated and deoxygenated myo-/hemoglobin signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in muscles of healthy volunteers before and after 6-MWT and after 14 days compared between to investigators
- Interreader reliability of collagen content [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative collagen signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in muscles of healthy volunteers before and after 6-MWT and after 14 days compared between to readers
- Interreader reliability of myo-/hemoglobin content [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative myo-/hemoglobin signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in muscles of healthy volunteers before and after 6-MWT and after 14 days compared between to readers
- Interreader reliability of oxygenated and deoxygenated myo-/hemoglobin content [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative oxygenated and deoxygenated myo-/hemoglobin signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in muscles of healthy volunteers before and after 6-MWT and after 14 days compared between to readers
- Muscular collagen content over time period [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative collagen signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in muscles of healthy volunteers compared between day 1 and after 14 days.
- Muscular myo-/hemoglobin content over time period [multiple time points ( 2 measurements on day 1 and 2 measurements on day 15)]
Quantitative myo-/hemoglobin signal derived by transcutaneous Multispectral Optoacoustic Tomography (MSOT) in muscles of healthy volunteers compared between day 1 and after 14 days.
Eligibility Criteria
Criteria
Inclusion Criteria:
-
18 years of age
Exclusion Criteria:
-
any reference to a myopathy
-
pregnancy
-
tattoo in the scanning region
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | University Hospital Erlangen | Erlangen | Bavaria | Germany | 91054 |
Sponsors and Collaborators
- University of Erlangen-Nürnberg Medical School
Investigators
- Principal Investigator: Adrian Regensburger, Dr., Department of Pediatrics and Adolescent Medicine, University of Erlangen
- Principal Investigator: Ferdinand Knieling, Dr., Department of Pediatrics and Adolescent Medicine, University of Erlangen
Study Documents (Full-Text)
More Information
Publications
None provided.- 169_19B