Email this article Structural and bioenergetic changes in muscle tissue in idiopathic muscular dystonia
- Authors: Bushueva O.O.1,2, Antipenko E.A.1, Pchelin P.V.1, Mukhina I.V.1,3, Lobanov I.A.4
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Affiliations:
- Privolzhsky Research Medical University
- State Hospital No. 33 of the Leninsky district
- National Research Lobachevsky State University
- Medical Center “Tonus LIFE”
- Issue: Vol LIV, No 3 (2022)
- Pages: 33-41
- Section: Original study arcticles
- URL: https://journal-vniispk.ru/1027-4898/article/view/111190
- DOI: https://doi.org/10.17816/nb111190
- ID: 111190
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Abstract
BACKGROUND. Muscular dystonia is a syndrome with localization of the pathological process in the central nervous system and the formation of local muscle hypertonicity. It is relevant to study changes in the muscles involved in hyperkinesis in dystonia as one of the possible symptoms of the disease.
AIM. To identify structural and bioenergetic changes in muscles in patients with idiopathic muscular dystonia.
MATERIAL AND METHODS. 10 patients were examined with a diagnosis of idiopathic segmental and generalized dystonia, including cervical dystonia syndrome. The control group included 5 conditionally healthy individuals. All patients received injections of botulinum toxin type A with a TWSTRS and Tsui efficacy score before injection and 3 weeks after injection. Structural changes in the muscles were assessed by magnetic resonance imaging (MRI) (1.5 Tl). To assess bioenergetic changes, the parameters of mitochondrial respiration were studied, including basal respiration during oxidation of substrates (pyruvate and pyruvate-malate), respiration during oxidative phosphorylation with various participation of respiratory chain complexes, electron transport chain capacity (ETC), ATP-associated respiration in a trapezius muscle biopsy.
RESULTS. Bioenergetic changes in muscle tissue were revealed in the form of a decrease in the indices of initial respiration, basal respiration with the participation of the I complex (KI) ETC in the process of oxidation of pyruvate and pyruvate-malate substrates, oxidative phosphorylation with the participation of KI. Structural changes of muscle tissue in the form of asymmetric hypertrophy and partial fat replacement of the involved muscles are demonstrated. The presence of fat replacement reduced the difference on the TWSTRS scale before botulinum therapy and 3 weeks after injection.
CONCLUSIONS. Patients with dystonia have bioenergetic changes in muscle tissue in the form of a defect in the work of the KI respiratory chain, but these changes do not affect the effectiveness of botulinum therapy. Structural changes in the form of partial fat replacement of muscle tissue reduce the effectiveness of botulinum therapy.
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##article.viewOnOriginalSite##About the authors
Olga O. Bushueva
Privolzhsky Research Medical University; State Hospital No. 33 of the Leninsky district
Author for correspondence.
Email: ol.bushueva@mail.ru
ORCID iD: 0000-0002-4942-9348
SPIN-code: 1441-6207
M.D., Assistant, Depart. of Neurology, Psychiatry and Narcology
Russian Federation, Nizhny Novgorod; Nizhny NovgorodElena A. Antipenko
Privolzhsky Research Medical University
Email: antipenkoea@yandex.ru
ORCID iD: 0000-0002-8972-9150
SPIN-code: 7708-9068
M.D., D. Sci. (Med.), Assoc. Prof., Depart. of Neurology, Psychiatry and Narcology
Russian Federation, Nizhny NovgorodPavel V. Pchelin
Privolzhsky Research Medical University
Email: ptch.pv@gmail.com
ORCID iD: 0000-0001-7898-8547
SPIN-code: 6781-5255
junior research assistant, Depart. of Molecular and Cellular Technologies
Russian Federation, Nizhny NovgorodIrina V. Mukhina
Privolzhsky Research Medical University; National Research Lobachevsky State University
Email: mukhinaiv@mail.ru
ORCID iD: 0000-0002-8811-0049
SPIN-code: 9377-7297
D. Sci. (Biol.), Prof., Depart. of Normal Physiology
Russian Federation, Nizhny Novgorod; Nizhny NovgorodIgor A. Lobanov
Medical Center “Tonus LIFE”
Email: igolobano@mail.ru
ORCID iD: 0000-0002-1134-439X
radiologist
Russian Federation, Nizhny NovgorodReferences
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