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Sun K, Sun Y, Du X, Zhang X, Ma Z, Gao Y, Liang X. Lnc-Clic5 as a sponge for miR-212-5p to inhibit cow barn PM 2.5-induced apoptosis in rat alveolar macrophages. Toxicology 2024; 504:153797. [PMID: 38583737 DOI: 10.1016/j.tox.2024.153797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 03/17/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
Particulate matter 2.5 (PM2.5) is a highly hazardous airborne particulate matter that poses a significant risk to humans and animals. Urban airborne particulate matter contributes to the increased incidence and mortality of respiratory diseases, such as asthma and chronic obstructive pulmonary disease (COPD), in humans. However, the specific mechanism by which PM2.5 affects animals in barn environments is yet to be elucidated. In this study, we investigated the effect of exposure to cow barn PM2.5 on rat alveolar macrophages (NR8383) and found that it induced apoptosis via the miR-212-5p/RASSF1 pathway. We found that lnc-Clic5 expression was downregulated in NR8383 cells exposed to cow barn PM2.5. Lnc-Clic5 plays a competitive endogenous RNA (ceRNA) regulatory role by sponging miR-212-5p to attenuate the regulation of RASSF1. Moreover, lnc-Clic5 overexpression inhibited NR8383 apoptosis by targeting the miR-212-5p/RASSF1 pathway. Co-treatment with miR-212-5p and lnc-Clic5 in the presence of cow barn PM2.5 revealed that lnc-Clic5 reversed NR8383 cell apoptosis induced by PM2.5 when miR-212-5p was overexpressed. These findings contribute to the study of ncRNAs and ceRNAs regulating PM2.5-induced apoptosis in animal farms, provide therapeutic targets for lung macrophage apoptosis, and may be useful for further evaluating the toxicological effects of PM2.5 in farmhouses on the respiratory systems of humans and animals.
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Affiliation(s)
- Ke Sun
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
| | - Yize Sun
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
| | - Xiaohui Du
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
| | - Xiqing Zhang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
| | - Zhenhua Ma
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China
| | - Yunhang Gao
- College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China.
| | - Xiaojun Liang
- Ningxia Academy of Agriculture and Forestry, Yinchuan 750002, China.
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Jia C, Xiang Z, Zhang P, Liu L, Zhu X, Yu R, Liu Z, Wang S, Liu K, Wang Z, Vasilev K, Zhou S, Geng Z, Liu X, Zhao Y, Gao Y, Cheng L, Li Y. Selenium-SelK-GPX4 axis protects nucleus pulposus cells against mechanical overloading-induced ferroptosis and attenuates senescence of intervertebral disc. Cell Mol Life Sci 2024; 81:49. [PMID: 38252317 PMCID: PMC10803455 DOI: 10.1007/s00018-023-05067-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 11/20/2023] [Accepted: 11/24/2023] [Indexed: 01/23/2024]
Abstract
Intervertebral disc degeneration (IVDD) is one of the most prevalent spinal degenerative disorders and imposes places heavy medical and economic burdens on individuals and society. Mechanical overloading applied to the intervertebral disc (IVD) has been widely recognized as an important cause of IVDD. Mechanical overloading-induced chondrocyte ferroptosis was reported, but the potential association between ferroptosis and mechanical overloading remains to be illustrated in nucleus pulposus (NP) cells. In this study, we discovered that excessive mechanical loading induced ferroptosis and endoplasmic reticulum (ER) stress, which were detected by mitochondria and associated markers, by increasing the intracellular free Ca2+ level through the Piezo1 ion channel localized on the plasma membrane and ER membrane in NP cells. Besides, we proposed that intracellular free Ca2+ level elevation and the activation of ER stress are positive feedback processes that promote each other, consistent with the results that the level of ER stress in coccygeal discs of aged Piezo1-CKO mice were significantly lower than that of aged WT mice. Then, we confirmed that selenium supplementation decreased intracellular free Ca2+ level by mitigating ER stress through upregulating Selenoprotein K (SelK) expression. Besides, ferroptosis caused by the impaired production and function of Glutathione peroxidase 4 (GPX4) due to mechanical overloading-induced calcium overload could be improved by selenium supplementation through Se-GPX4 axis and Se-SelK axis in vivo and in vitro, eventually presenting the stabilization of the extracellular matrix (ECM). Our findings reveal the important role of ferroptosis in mechanical overloading-induced IVDD, and selenium supplementation promotes significance to attenuate ferroptosis and thus alleviates IVDD, which might provide insights into potential therapeutic interventions for IVDD.
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Affiliation(s)
- Chunwang Jia
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Ziqian Xiang
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Pengfei Zhang
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Long Liu
- Department of Pathology, Cheeloo College of Medicine, Qilu Hospital, Shandong University, Jinan, 250012, Shandong, People's Republic of China
| | - Xuetao Zhu
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Ruixuan Yu
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Zhicheng Liu
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Shaoyi Wang
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Kaiwen Liu
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Zihao Wang
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Krasimir Vasilev
- Academic Unit of STEM, University of South Australia, Mawson Lakes, Adelaide, SA, 5095, Australia
- College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Australia
| | - Shuanhu Zhou
- Department of Orthopedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Ziwen Geng
- Qilu Institute of Technology, Jinan, 250200, Shandong, People's Republic of China
| | - Xinyu Liu
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China
| | - Yunpeng Zhao
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China.
| | - Yuan Gao
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China.
| | - Lei Cheng
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China.
| | - Yuhua Li
- Department of Orthopaedics, Cheeloo College of Medicine, Qilu Hospital, Shandong University, 107 Wenhuaxi Road, Jinan, 250012, Shandong, People's Republic of China.
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Zhang Q, Liu G, Liu R, Liu J, Zeng X, Ren D, Yan X, Yuan X. Dual role of endoplasmic reticulum stress-ATF-6 activation in autophagy and apoptosis induced by cyclic stretch in myoblast. Apoptosis 2023; 28:796-809. [PMID: 36881290 DOI: 10.1007/s10495-023-01825-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/09/2023] [Indexed: 03/08/2023]
Abstract
OBJECTIVE Mandibular growth that is induced by functional appliances is closely associated with skeletal and neuromuscular adaptation. Accumulating evidence has proved that apoptosis and autophagy have a vital role in adaptation process. However, little is known about the underlying mechanisms. This study sought to determine whether ATF-6 is involved in stretch-induced apoptosis and autophagy in myoblast. The study also sought to uncover the potential molecular mechanism. MATERIALS AND METHODS Apoptosis was assessed by TUNEL and Annexin V and PI staining. Autophagy was detected by transmission electron microscopy (TEM) analysis and immunofluorescent staining for autophagy-related protein light chain 3 (LC3). Real time-PCR and western blot were performed to evaluate the expression level of mRNA and proteins that were associated with endoplasmic reticulum stress (ERS), autophagy and apoptosis. RESULTS Cyclic stretch significantly decreased the cell viability and induced apoptosis and autophagy of myoblasts time-dependently. Stretching stimuli activated ATF-6 pathway and induced ERS-mediated apoptosis. Moreover, using 4-PBA significantly inhibited ERS-related apoptosis, as well as partially decreasing autophagy. In addition, inhibition of autophagy by 3-MA enhanced apoptosis by affecting the expression of CHOP and Bcl-2. However, it had no obvious effects on ERS-related proteins of GRP78 and ATF-6. More importantly, knockdown ATF-6 effectively weakened apoptosis and autophagy. It did so by regulating the expression of Bcl-2, Beclin1 and CHOP, but not cleaved Caspase-12, LC3II and p62 in stretched myoblast. CONCLUSION ATF-6 pathway was activated in myoblast by mechanical stretch. ATF-6 may regulate the process of stretch-induced myoblast apoptosis and autophagy via CHOP, Bcl-2 and Beclin1 signaling.
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Affiliation(s)
- Qiang Zhang
- Department of Orthodontics, The Affiliated Hospital of Qingdao University, Qingdao, China.,School of Stomatology, Qingdao University, Qingdao, China
| | - Guirong Liu
- Department of Stomatology, Qingdao Municipal Hospital, Qingdao, China
| | - Ran Liu
- Department of Orthodontics, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jun Liu
- Department of Orthodontics, The Affiliated Hospital of Qingdao University, Qingdao, China.,School of Stomatology, Qingdao University, Qingdao, China
| | - Xuemin Zeng
- Department of Orthodontics, The Affiliated Hospital of Qingdao University, Qingdao, China.,School of Stomatology, Qingdao University, Qingdao, China
| | - Dapeng Ren
- Department of Orthodontics, The Affiliated Hospital of Qingdao University, Qingdao, China.,School of Stomatology, Qingdao University, Qingdao, China
| | - Xiao Yan
- Department of Orthodontics, The Affiliated Hospital of Qingdao University, Qingdao, China. .,School of Stomatology, Qingdao University, Qingdao, China.
| | - Xiao Yuan
- Department of Orthodontics, The Affiliated Hospital of Qingdao University, Qingdao, China. .,School of Stomatology, Qingdao University, Qingdao, China.
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