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Abstract
Tarsal tunnel syndrome (TTS) is an entrapment neuropathy of the tibial nerve (TN) within the tarsal tunnel (TT) at the level of the tibio-talar and/or talo-calcaneal joints. Making a diagnosis of TTS can be challenging, especially when symptoms overlap with other conditions and electrophysiological studies lack specificity. Imaging, in particular MRI, can help identify causative factors in individuals with suspected TTS and help aid surgical management. In this article, we review the anatomy of the TT, the diagnosis of TTS, aetiological factors implicated in TTS and imaging findings, with an emphasis on MRI.
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Affiliation(s)
- Davoud Khodatars
- Radiology Department, Royal National Orthopaedic Hospital, Stanmore, UK.
| | - Ankur Gupta
- Foot and Ankle Orthopaedic Surgery Department, Royal National Orthopaedic Hospital, Stanmore, UK
| | - Matthew Welck
- Foot and Ankle Orthopaedic Surgery Department, Royal National Orthopaedic Hospital, Stanmore, UK
| | - Asif Saifuddin
- Radiology Department, Royal National Orthopaedic Hospital, Stanmore, UK
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Tang X, Wang J, Zhou S, Zhou J, Jia G, Wang H, Xin C, Fu G, Zhang J. miR‑760 regulates skeletal muscle proliferation in rheumatoid arthritis by targeting Myo18b. Mol Med Rep 2019; 20:4843-4854. [PMID: 31661144 PMCID: PMC6854551 DOI: 10.3892/mmr.2019.10775] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 07/17/2019] [Indexed: 12/20/2022] Open
Abstract
MicroRNAs serve an important role in the development of several diseases. Numerous genes regulate the skeletal muscle differentiation of C2C12 myoblasts. The role of miR-760 in rheumatoid arthritis (RA) has not been reported, to the best of our knowledge. Therefore, the aim of the present study was to examine the role of miR-760 in regulating skeletal muscle proliferation in RA. Potential genes functionally involved in the tarsal joint of a collagen-induced RA model were identified using Gene Expression Omnibus. Reverse transcription-quantitative PCR and western blot analyses were performed to determine the mRNA and protein expression levels. The proliferation, cell cycle progression and migration of C2C12 myoblasts were detected using Cell Counting Kit-8, flow cytometry and wound-healing assays, respectively. TargetScan was used to predict the potential target genes of miR-760, and this was verified using a dual-luciferase reporter assay. In the present study, myosin-18b (Myo18b) expression was determined to be downregulated in the RA model. Silencing Myo18b decreased the proliferation, abrogated the cell cycle progression, and reduced the migration and differentiation of C2C12 myoblasts. Expression levels of cyclin-dependent kinase 2, cyclin D1, matrix metalloproteinase (MMP)-2, MMP-9, myogenin and myosin heavy chain 6 were all decreased when Myo18b was silenced. Furthermore, overexpression of Myo18b induced opposing effects on C2C12 myoblasts. It was shown that Myo18b was a target gene of miRNA-760. Overexpression of miR-760 decreased proliferation, cell cycle progression, migration and differentiation in C2C12 myoblasts, and decreased the expression of Myo18b. The opposite results were observed when miR-760 was downregulated. In conclusion, miR-760 inhibited proliferation and differentiation by targeting Myo18b in C2C12 myoblasts. The results of the present study may contribute to understanding the mechanisms underlying RA skeletal muscle proliferation, and miR-760/Myo18b may serve as potential targets for treating patients with RA.
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Affiliation(s)
- Xujun Tang
- Department of Osteoarthritis, Jining No. 2 People's Hospital, Jining, Shandong 272049, P.R. China
| | - Jiuxia Wang
- Department of Bone Oncology, Gansu Provincial Hospital of Traditional Chinese Medicine, Lanzhou, Gansu 730050, P.R. China
| | - Shuhong Zhou
- Department of Rheumatology, Gansu Provincial Hospital, Lanzhou, Gansu 730000, P.R. China
| | - Jing Zhou
- Department of Rheumatology, Gansu Provincial Hospital, Lanzhou, Gansu 730000, P.R. China
| | - Guyou Jia
- Department of Osteoarthritis, Jining No. 2 People's Hospital, Jining, Shandong 272049, P.R. China
| | - Han Wang
- Department of Osteoarthritis, Jining No. 2 People's Hospital, Jining, Shandong 272049, P.R. China
| | - Chunlei Xin
- Department of Hematology, Jining No. 1 People's Hospital, Jining, Shandong 272011, P.R. China
| | - Guoning Fu
- Department of Hematology, Jining No. 1 People's Hospital, Jining, Shandong 272011, P.R. China
| | - Jiahong Zhang
- Department of Rheumatology, Gansu Provincial Hospital, Lanzhou, Gansu 730000, P.R. China
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