Evaluation of Mitochondrial Function in Myofascial Trigger Points Cohort Pilot Study Using High-resolution Respirometry

Study Overview
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Brief Summary
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This pilot study established a minimally invasive biopsy technique to obtain high-quality MTrP tissue samples to evaluate mitochondrial function via high-resolution respirometry.

Detailed Description
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Myofascial trigger points (MTrPs) are hyperirritable areas in the fascia of the affected muscle, possibly related to mitochondrial impairment. They can result in pain and hypoxic areas within the muscle. This pilot study established a minimally invasive biopsy technique to obtain high-quality MTrP tissue samples to evaluate mitochondrial function via high-resolution respirometry. Secondary objectives included the safety of the biopsy procedure assessed via clinical wound healing (number of patients with signs for local infection and inflammation). For this purpose, twenty healthy males participated in this study, 10 with a diagnosis of myofascial pain in the musculus (m.) trapezius MTrP (TTP group) and 10 with a diagnosis of myofascial pain in the m. gluteus medius (GTP group). The affected muscle was biopsied followed by a biopsy from the vastus lateralis to be used as a control. Measurements of oxygen consumption were carried out using high-resolution respirometry.

Official Title
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Evaluation of Mitochondrial Function in Chronic Myofascial Trigger Points - A Prospective Cohort Pilot Study Using High-resolution Respirometry

Conditions
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Pain, Neck, Pain, Back, Myofascial Trigger Point Pain, Myofascial Pain, Mitochondrial Pathology

Intervention / Treatment
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* Procedure: Muscle biopsy


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male patients aged 18-45 years Clinical diagnosis of myofascial pain syndrome within the region of the shoulder-neck muscles or the lumbogluteal region and the presence of an MTrP, defined as a firm palpation of a hard, tender nodule resulting in a spontaneous pain complaint with symptoms present for 1 to 12 months Exclusion Criteria: Signs that the participant's prescriptive compliance was not expected (e.g., lack of cooperation) Disorders of the respiratory tract Neurological disorders, in particular neurodegenerative and neuromuscular diseases Disorders of the cardiovascular system or the musculoskeletal system Civil servants and military service personnel.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 45 Years

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Single<br>Evaluation of mitochondrial function after muscle biopsy and follow-up for surgical complications. | Procedure: Muscle biopsy<br>* Local anesthesia was applied to the superficial skin covering the MTrP of each participant. Percutaneous biopsy sampling optimized with a suction-enhancement technique was used to obtain muscle biopsies of the m. trapezius MTrP or the m. gluteus medius MTrP from each participant using small Bergstrom muscle biopsy needle, 8 swg (4.0mm) x 100 mm (Dixons Surgical Instruments, Essex, United Kingdom).<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Mitochondrial function in myofascial trigger points | Mitochondrial respiration was assessed from muscle biopsy samples obtained from trigger points of the musculus trapezius and the musculus gluteus medius | Baseline measurement | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of participants with biopsy-related impaired wound healing | Clinical wound assessment (number of patients with signs for local infection and inflammation) | Baseline and follow-up assessment (1 week after the baseline biopsy) |