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Cong M, Li J, Qiao Y, Jing R, Li H, Li Z. Specific effects of neuregulin-1β on the communication between DRG neurons and skeletal muscle cells in vitro. J Muscle Res Cell Motil 2018; 39:117-134. [PMID: 30209718 DOI: 10.1007/s10974-018-9498-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 09/04/2018] [Indexed: 11/28/2022]
Abstract
The communication between primary afferent neuron and skeletal muscle (SKM) is one of the important factors on maintaining the structure and function of SKM cells. Neuregulin-1β (NRG-1β) signaling is essential for regulating synaptic neurotransmission. Here, we established a neuromuscular coculture model of dorsal root ganglion (DRG) sensory neurons and SKM cells to explore the nerve-muscle communication in the presence of exogenous NRG-1β. The expression of three distinct subtypes (TrkA, TrkB, and TrkC) of tyrosine kinase receptors was monitored for the phenotypical alterations of the neurons. The aggregation extent of acetylcholine receptor (AChR) represents the specific changes of SKM cells after NRG-1β incubation in this neuromuscular coculture model. The results showed that NRG-1β not only enhanced neurite outgrowth of DRG neurons but also increased the length and branches of SKM cells. NRG-1β treatment not only induced expression of all the three subtypes of Trk receptors in neurons but also promoted AChR aggregation on the surface of SKM cells. The effects of NRG-1β could be blocked by administration of ERK1/2 inhibitor PD98059, PI3K inhibitor LY294002, and JAK2 inhibitor AG490, respectively. These data imply that NRG-1β is essential for the nerve-muscle communication by enhancing growth and modifying phenotypes of the two different kinds of cells. The specific effects produced by NRG-1β add novel interpretation for nerve-muscle communication between sensory neurons and SKM cells.
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Affiliation(s)
- Menglin Cong
- Department of Anatomy, Shandong University School of Basic Medical Sciences, 44 Wenhua Xi Road, Jinan, 250012, Shandong, China.,Department of Orthopaedics, Shandong University Qilu Hospital, Jinan, 250012, China
| | - Jianmin Li
- Department of Orthopaedics, Shandong University Qilu Hospital, Jinan, 250012, China
| | - Yuan Qiao
- Department of Anatomy, Shandong University School of Basic Medical Sciences, 44 Wenhua Xi Road, Jinan, 250012, Shandong, China.,Department of Orthopaedics, Shandong University Qilu Hospital, Jinan, 250012, China
| | - Rui Jing
- Medical Imaging Center, the Second Hospital of Shandong University, Jinan, 250033, China
| | - Hao Li
- Department of Orthopaedics, Shandong University Qilu Hospital, Jinan, 250012, China
| | - Zhenzhong Li
- Department of Anatomy, Shandong University School of Basic Medical Sciences, 44 Wenhua Xi Road, Jinan, 250012, Shandong, China.
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