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Song M, Zhang C, Zhang Y, Chao W, Zhang L, Xu D, Zhu K, Li G, Zhao H, Ma X. Effect of Transforming Growth Factor Beta (TGF- β) on the Degeneration of Intervertebral Discs by Regulating Nuclear Factor Kappa-Light-Chain-Enhancer of Activated B Cells/Mammalian Target of Rapamycin (NF-fcB/mTOR) Signaling Pathway. J BIOMATER TISS ENG 2021. [DOI: 10.1166/jbt.2021.2699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Intervertebral disc degenerative disease (IDDD) is common in orthopedics. TGF-β involves in inflammation and tissue repair. But its role in IDDD remains unclear. IDDD patients and normal intervertebral disc nucleus pulposus tissues were collected. IDDD was divided into prominent
group and prolapse group. IDDD nucleus pulposus cells were isolated and divided into control group, TGF-β agonist group and TGF-β inhibitor group followed by analysis of cell proliferation by MTT, cell apoptosis by flow cytometry BALP and OC expression by Real time
PCR, NF-/<B/mTOR signaling protein expression by Western blot as well as IL-1 and IL-6 secretion by ELISA. Compared with normal group, TGF-β mRNA and serum level in patients with IDDD was significantly decreased (P < 0.05), with more significant changes in prolapse
group (P < 0.01). Pfirrmann grading scores were negatively correlated with TGF-β serum level (P < 0.001). TGF-β agonists can significantly promote cell proliferation, inhibit apoptosis, upregulate BALP and OC expression, inhibit NF-κB
expression, increased p-mTOR level and decrease IL-1 and IL-6 secretion (P < 0.05). All these changes were significantly reversed by TGF-β inhibitors (P < 0.05). TGF-β expression in IDDD is reduced and associated with disease severity. Promoting
TGF-β expression can inhibit inflammatory factors secretion, promote BALP and OC expression and cell proliferation, and inhibit the degeneration of intervertebral discs by regulating NF-/<B/mTOR signaling.
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Affiliation(s)
- Mengxiong Song
- Department of Orthopaedics, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China
| | - Chi Zhang
- Department of Orthopaedics, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China
| | - Yongtao Zhang
- Department of Orthopaedics, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China
| | - Wang Chao
- Department of Orthopaedics, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China
| | - Lin Zhang
- Department of Clinic Medicine, Qingdao University, Qingdao, Shandong, 266003, China
| | - Derong Xu
- Department of Orthopaedics, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China
| | - Kai Zhu
- Department of Orthopaedics, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China
| | - Guanghui Li
- Department of Orthopaedics, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China
| | - Han Zhao
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China
| | - Xuexiao Ma
- Department of Orthopaedics, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266003, China
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