PMID- 29023846 OWN - NLM STAT- MEDLINE DCOM- 20190305 LR - 20190305 IS - 1097-4598 (Electronic) IS - 0148-639X (Linking) VI - 57 IP - 4 DP - 2018 Apr TI - Locomotor and skeletal muscle abnormalities in trembler J neuropathic mice. PG - 664-671 LID - 10.1002/mus.25987 [doi] AB - INTRODUCTION: Patients with hereditary peripheral neuropathies exhibit characteristic deformities of the hands and feet and have difficulty ambulating. To examine to what extent neuropathic animals recapitulate these deficits, we studied trembler J (TrJ) mice, which model early-onset demyelinating neuropathy. METHODS: A cohort of 4-month-old female wild type and neuropathic mice were evaluated for locomotor measurements, neuromuscular function, and skeletal muscle proteolysis and morphometry. RESULTS: Utilizing the DigiGait imaging system, we identified pronounced alterations in forepaw and hindpaw angles and a decrease in hindpaw area on the treadmill in neuropathic rodents. Torque production by the tibialis anterior (TA) muscle was significantly weakened and was paralleled by a decrease in myofiber cross-sectional area and an increase in muscle tissue proteolysis. DISCUSSION: Our findings in TrJ mice reflect the phenotypic presentation of the human neuropathy in which patients exhibit weakness of the TA muscle resulting in foot drop and locomotor abnormalities. Muscle Nerve 57: 664-671, 2018. CI - (c) 2017 Wiley Periodicals, Inc. FAU - Falk, Darin J AU - Falk DJ AD - Department of Neuroscience, College of Medicine, McKnight Brain Institute, University of Florida, 1149 Newell Drive, Box 100244 Gainesville, Florida, 32610-0244, USA. AD - Department of Pediatrics, College of Medicine, University of Florida, Gainesville, Florida, 32610-0244, USA. FAU - Galatas, Tori AU - Galatas T AD - Department of Neuroscience, College of Medicine, McKnight Brain Institute, University of Florida, 1149 Newell Drive, Box 100244 Gainesville, Florida, 32610-0244, USA. FAU - Todd, Adrian G AU - Todd AG AD - Department of Pediatrics, College of Medicine, University of Florida, Gainesville, Florida, 32610-0244, USA. FAU - Soto, Elliott P AU - Soto EP AD - Department of Neuroscience, College of Medicine, McKnight Brain Institute, University of Florida, 1149 Newell Drive, Box 100244 Gainesville, Florida, 32610-0244, USA. FAU - Harris, Andrew B AU - Harris AB AD - Department of Neuroscience, College of Medicine, McKnight Brain Institute, University of Florida, 1149 Newell Drive, Box 100244 Gainesville, Florida, 32610-0244, USA. FAU - Notterpek, Lucia AU - Notterpek L AD - Department of Neuroscience, College of Medicine, McKnight Brain Institute, University of Florida, 1149 Newell Drive, Box 100244 Gainesville, Florida, 32610-0244, USA. AD - Department of Neurology, College of Medicine, McKnight Brain Institute, University of Florida, Gainesville, Florida, USA. LA - eng PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20171024 PL - United States TA - Muscle Nerve JT - Muscle & nerve JID - 7803146 RN - 0 (Myelin Proteins) RN - 0 (Pmp22 protein, mouse) SB - IM MH - Animals MH - Charcot-Marie-Tooth Disease/genetics/*physiopathology MH - Disease Models, Animal MH - Female MH - Gait Analysis MH - Hereditary Sensory and Motor Neuropathy/genetics/physiopathology MH - Locomotion/*physiology MH - Mice MH - Muscle, Skeletal/*physiopathology MH - Myelin Proteins/genetics MH - Peripheral Nervous System Diseases/genetics/physiopathology MH - Phenotype MH - Torque OTO - NOTNLM OT - Charcot-Marie-Tooth disease OT - demyelination OT - muscle atrophy OT - neuromuscular function OT - neuropathy EDAT- 2017/10/13 06:00 MHDA- 2019/03/06 06:00 CRDT- 2017/10/13 06:00 PHST- 2017/10/07 00:00 [accepted] PHST- 2017/10/13 06:00 [pubmed] PHST- 2019/03/06 06:00 [medline] PHST- 2017/10/13 06:00 [entrez] AID - 10.1002/mus.25987 [doi] PST - ppublish SO - Muscle Nerve. 2018 Apr;57(4):664-671. doi: 10.1002/mus.25987. Epub 2017 Oct 24.