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Fu J, Wu C, Xu G, Zhang J, Chen J, Chen C, Hong H, Xue P, Jiang J, Huang J, Ji C, Cui Z. Protective effect of TNIP2 on the inflammatory response of microglia after spinal cord injury in rats. Neuropeptides 2023; 101:102351. [PMID: 37329819 DOI: 10.1016/j.npep.2023.102351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 04/30/2023] [Accepted: 06/08/2023] [Indexed: 06/19/2023]
Abstract
BACKGROUND Spinal cord injury (SCI) is a devastating disease that can lead to tissue loss and neurological dysfunction. TNIP2 is a negative regulator of NF-κB signaling due to its capacity to bind A20 and suppress inflammatory cytokines-induced NF-κB activation. However, the anti-inflammatory role of TNIP2 in SCI remains unclear. Our study's intention was to evaluate the effect of TNIP2 on the inflammatory response of microglia after spinal cord injury in rats. METHODS HE staining and Nissl staining were performed on day 3 following SCI to analyze the histological changes. To further investigate the functional changes of TNIP2 after SCI, we performed immunofluorescence staining experiments. The effect of LPS on TNIP2 expression in BV2 cells was examined by western blot. The levels of TNF-α, IL-1β, and IL-6 in spinal cord tissues of rats with SCI and in BV2 cells with LPS were measured by using qPCR. RESULTS TNIP2 expression was closely associated with the pathophysiology of SCI in rats, and TNIP2 was involved in regulating functional changes in microglia. TNIP2 expression was increased during SCI in rats and that overexpression of TNIP2 inhibited M1 polarization and pro-inflammatory cytokine production in microglia, which might ultimately protect against inflammatory responses through the MAPK and NF-κB signaling pathways. CONCLUSIONS The present study provides evidence for a role of TNIP2 in the regulation of inflammation in SCI and suggests that induction of TNIP2 expression alleviated the inflammatory response of microglia.
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Affiliation(s)
- Jiawei Fu
- The Affiliated Hospital 2 of Nantong University, Nantong University, The First People's Hospital of Nantong, Nantong 226001, Jiangsu, People's Republic of China; Key Laboratory for Restoration Mechanism and Clinical Translation of Spinal Cord Injury, Nantong 226001, Jiangsu, People's Republic of China; Research institute for Spine and spinal cord disease of Nantong University, 226001, Jiangsu, People's Republic of China
| | - Chunshuai Wu
- The Affiliated Hospital 2 of Nantong University, Nantong University, The First People's Hospital of Nantong, Nantong 226001, Jiangsu, People's Republic of China; Key Laboratory for Restoration Mechanism and Clinical Translation of Spinal Cord Injury, Nantong 226001, Jiangsu, People's Republic of China; Research institute for Spine and spinal cord disease of Nantong University, 226001, Jiangsu, People's Republic of China
| | - Guanhua Xu
- The Affiliated Hospital 2 of Nantong University, Nantong University, The First People's Hospital of Nantong, Nantong 226001, Jiangsu, People's Republic of China; Key Laboratory for Restoration Mechanism and Clinical Translation of Spinal Cord Injury, Nantong 226001, Jiangsu, People's Republic of China; Research institute for Spine and spinal cord disease of Nantong University, 226001, Jiangsu, People's Republic of China
| | - Jinlong Zhang
- The Affiliated Hospital 2 of Nantong University, Nantong University, The First People's Hospital of Nantong, Nantong 226001, Jiangsu, People's Republic of China
| | - Jiajia Chen
- The Affiliated Hospital 2 of Nantong University, Nantong University, The First People's Hospital of Nantong, Nantong 226001, Jiangsu, People's Republic of China
| | - Chu Chen
- The Affiliated Hospital 2 of Nantong University, Nantong University, The First People's Hospital of Nantong, Nantong 226001, Jiangsu, People's Republic of China
| | - Hongxiang Hong
- The Affiliated Hospital 2 of Nantong University, Nantong University, The First People's Hospital of Nantong, Nantong 226001, Jiangsu, People's Republic of China
| | - Pengfei Xue
- The Affiliated Hospital 2 of Nantong University, Nantong University, The First People's Hospital of Nantong, Nantong 226001, Jiangsu, People's Republic of China
| | - Jiawei Jiang
- The Affiliated Hospital 2 of Nantong University, Nantong University, The First People's Hospital of Nantong, Nantong 226001, Jiangsu, People's Republic of China
| | - Jiayi Huang
- The Affiliated Hospital 2 of Nantong University, Nantong University, The First People's Hospital of Nantong, Nantong 226001, Jiangsu, People's Republic of China
| | - Chunyan Ji
- The Affiliated Hospital 2 of Nantong University, Nantong University, The First People's Hospital of Nantong, Nantong 226001, Jiangsu, People's Republic of China; Key Laboratory for Restoration Mechanism and Clinical Translation of Spinal Cord Injury, Nantong 226001, Jiangsu, People's Republic of China; Research institute for Spine and spinal cord disease of Nantong University, 226001, Jiangsu, People's Republic of China
| | - Zhiming Cui
- The Affiliated Hospital 2 of Nantong University, Nantong University, The First People's Hospital of Nantong, Nantong 226001, Jiangsu, People's Republic of China; Key Laboratory for Restoration Mechanism and Clinical Translation of Spinal Cord Injury, Nantong 226001, Jiangsu, People's Republic of China; Research institute for Spine and spinal cord disease of Nantong University, 226001, Jiangsu, People's Republic of China.
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Niu H, Hao Y, Pang Y, Shen Y, Li J, Xu X. LncRNA-adm2 targets adm2 via cid-miR-n3 and negatively regulates the inflammatory response in grass carp (Ctenopharyngodon idella). FISH & SHELLFISH IMMUNOLOGY 2023; 138:108800. [PMID: 37187213 DOI: 10.1016/j.fsi.2023.108800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 04/23/2023] [Accepted: 05/05/2023] [Indexed: 05/17/2023]
Abstract
Long non-coding RNAs (lncRNAs), which impact gene expression following pathogen infections, have garnered significant attention in recent years. Recent discoveries have revealed that lncRNAs play a crucial role in fish immune responses to pathogen infections. We investigated the influence of lncRNA-adm2 on the antibacterial immune response generated by Aeromonas hydrophila in grass carp (Ctenopharyngodon idella) through the adsorption of cid-miR-n3. Furthermore, we found that cid-miR-n3 interacts with lncRNA-adm2 and targets the 3' UTR of adm2. The upregulation of lncRNA-adm2 expression led to the suppression of pro-inflammatory cytokines (il-1β and il-6) in CIK cells, while anti-inflammatory cytokines (il-10) increased. Our research provides evidence that lncRNAs are involved in the antibacterial immune response of fish, expanding our understanding of the function of lncRNAs in teleosts.
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Affiliation(s)
- Huiqin Niu
- Key Laboratory of Freshwater Aquatic Genetic Resources Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
| | - Yinghu Hao
- Key Laboratory of Freshwater Aquatic Genetic Resources Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
| | - Yifan Pang
- Key Laboratory of Freshwater Aquatic Genetic Resources Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
| | - Yubang Shen
- Key Laboratory of Freshwater Aquatic Genetic Resources Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China
| | - Jiale Li
- Key Laboratory of Freshwater Aquatic Genetic Resources Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China.
| | - Xiaoyan Xu
- Key Laboratory of Freshwater Aquatic Genetic Resources Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, China; Shanghai Engineering Research Center of Aquaculture, Shanghai Ocean University, Shanghai, China.
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Zhang Y, Meng X, Liu K. The modulation of cAMP/PKA pathway by asiaticoside ameliorates high glucose-induced inflammation and apoptosis of retinal pigment epithelial cells. J Bioenerg Biomembr 2022; 54:9-16. [PMID: 35038080 DOI: 10.1007/s10863-021-09929-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 12/03/2021] [Indexed: 01/19/2023]
Abstract
Asiaticoside, the major bioactive constituent purified from Centella asiatica, is a pentacyclic triterpene saponin with sugar moieties (glucose-glucose-rhamnose). Its biological activities including anti-inflammation and antioxidant have been widely reported. This study aimed to investigate the role of asiaticoside in diabetic retinopathy (DR). Human retinal pigment epithelium (RPE) cells ARPE-19 were induced by high glucose. Then, cell survival rate, expression of inflammatory factors, oxidative stress, and apoptosis were measured by MTT method, western blot, oxidative stress detection kits and TUNEL respectively. To uncover the underlying mechanism, the levels of cyclic AMP (cAMP) and protein kinase A (PKA) were measured by Enzyme linked immunosorbent assay (ELISA) and PKA activities were detected by the Kemptide phosphorylation assay. Furthermore, cAMP inhibitor SQ22536 was also used to validate the mechanism. Asiaticoside suppressed the inflammation and apoptosis of ARPE-19 cells, and the activities of cAMP and PKA were inhibited upon HG induction while again released after further administration of asiaticoside. However, these effects were all abolished by SQ22536. In conclusion, we have demonstrated in this paper that asiaticoside ameliorates high glucose-induced inflammation and apoptosis of RPE cells by activating cAMP/PKA signaling pathway. asiaticoside-mediated activation of cAMP/PKA signaling pathway may serve as a potential target for the management of DR.
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Affiliation(s)
- Yixia Zhang
- Department of Ophthalmology, Wanzhou aier eye hospital, Chongqing, 404100, China
| | - Xindan Meng
- Department of Ophthalmology, Wanzhou aier eye hospital, Chongqing, 404100, China
| | - Keyu Liu
- Department of Surgery, Northern Kuanren Hospital, The Second Affiliated Hospital of Chongqing Medical University, Yubei District, 69 Renhe Xingguang Avenue, Chongqing, 401120, China.
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Rapaka D, Bitra VR, Challa SR, Adiukwu PC. Potentiation of microglial endocannabinoid signaling alleviates neuroinflammation in Alzheimer's disease. Neuropeptides 2021; 90:102196. [PMID: 34508923 DOI: 10.1016/j.npep.2021.102196] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 08/26/2021] [Accepted: 08/31/2021] [Indexed: 12/29/2022]
Abstract
Alzheimer's disease (AD) isaprogressive neurodegenerative disorder characterized by chronic inflammation due to the presence of neurotoxic Aβ and tau proteins. Increased microglial activation and inflated immune response are the other factors to be considered in AD pathology. Microglial cells own biochemical machinery that synthesizes and release endocannabinoids. The exploitation of therapeutic actions of endocannabinoid system has newly emerged in the field of Alzheimer's disease. The activation of cannabinoid receptors/ cannabinoid system modulates inflammatory responses. This review assesses the association between the microglial endocannabinoid system and neuroinflammation in AD. The data supporting the anti-inflammatory role of pharmacological agents modulating cannabinoid system are also reviewed.
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Affiliation(s)
- Deepthi Rapaka
- A.U. College of Pharmaceutical Sciences, Andhra University, Visakhapatnam 530003, India.
| | | | - Siva Reddy Challa
- Department of Cancer Biology and Pharmacology, University of Illinois College of Medicine, Peoria, IL 61614, USA
| | - Paul C Adiukwu
- School of Pharmacy, University of Botswana, P/Bag-0022, Gaborone, Botswana
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