Sensorial, structural and functional response of rats subjected to hind limb immobilization
| Autor: | Vânia Marilande Ceccatto, Francisco Fleury Uchoa Santos-Júnior, Vanessa Azevedo Mendonça, Juliana Osório Alves, Ana Maria Sampaio Assreuy, Alana de Freitas Pires, Natália Matos Ribeiro, Paula Matias Soares |
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| Jazyk: | angličtina |
| Předmět: |
Nociception
medicine.medical_specialty Hot Temperature Skeletal muscle Hindlimb Hypokinesia Protein degradation General Biochemistry Genetics and Molecular Biology Contractility Pharmacology Toxicology and Pharmaceutics(all) Internal medicine medicine Nociception assay Animals General Pharmacology Toxicology and Pharmaceutics Hot plate test Muscle Skeletal Nitrites L-Lactate Dehydrogenase Tibia business.industry Biochemistry Genetics and Molecular Biology(all) Hot plate Pain Perception General Medicine Anatomy Blood Proteins Alkaline Phosphatase Rats medicine.anatomical_structure Endocrinology Hindlimb Suspension Von Frey Calcium Female medicine.symptom business Muscle contraction Muscle Contraction |
| Zdroj: | Life Sciences. :158-163 |
| ISSN: | 0024-3205 |
| DOI: | 10.1016/j.lfs.2015.07.020 |
| Popis: | Aims This study analyzed the sensorial, structural and functional response of rats subjected to paw immobilization. Main methods Animal pelvis, hip, knee and ankle were immobilized using waterproof tape during two weeks for assessment of sensorial response to thermal (hot plate test) and mechanical stimuli (Von Frey test), motor system structure (histology and radiography) and muscle function (soleus contractility). Key findings Disuse animals became more responsive to thermal stimuli (49%), although less responsive to mechanical challenge (58%). Disuse animals showed local injuries such as reduction in muscle fiber diameter (16.7% in gastrocnemius, 5.7% in soleus), contractile activity (55% of the control maximal tonic contraction) and tibia cortical thickness (9.3%), besides increased nitrite:protein ratio, suggestive of protein degradation. Disuse also evoked systemic adaptations that include increase in serum lactate dehydrogenase (36.1%) and alkaline phosphatase (400%), but reduction in calcium (8.4%) and total serum protein (5.5%), especially albumin (34.2%). Significance Two weeks of functional paw disuse leads to local and systemic harmful adaptive changes in sensorial and structural systems. This study brings new insights into nervous and motor system mechanism associated with therapeutic limb immobilization in muscle and skeletal pathological conditions. |
| Databáze: | OpenAIRE |
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