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Zhang F, Zhang C. Rnf112 deletion protects brain against intracerebral hemorrhage (ICH) in mice by inhibiting TLR-4/NF-κB pathway. Biochem Biophys Res Commun 2018; 507:43-50. [PMID: 30454900 DOI: 10.1016/j.bbrc.2018.10.141] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 10/23/2018] [Indexed: 12/14/2022]
Abstract
Intracerebral hemorrhage (ICH) is reported as a common and often fatal type of stroke accompanied with high morbidity and mortality, and it frequently results in long-lasting neurological dysfunctions. However, the pathogenesis that contributes to ICH has not been fully understood. Rnf112, also known as Znf179, is a member of the RING finger protein family. The expression of Rnf112 is abundant in the brain and is modulated during brain progression and development. The study aimed to explore the role of Rnf112 in brain injury after ICH, as well as the underlying molecular mechanisms. The results indicated that ICH led to a significant decrease in Rnf112, which was confirmed in oxyhemoglobin (oxyHb)-incubated astrocytes and microglial cells. Moreover, the Rnf112 knockout (Rnf112-/-) mice and wild type (WT) mice induced by ICH were further employed. Compared to the WT/ICH group, Rnf112-/- mice exhibited accelerated brain injury, as evidenced by the increased brain water contents and neurological deficit scores (NDS). In comparison to WT/ICH group, a remarkable up-regulation in the release of pro-inflammatory cytokines, including tumor necrotic factor-α (TNF-α), interleukin-6 (IL-6), and IL-1β, was observed in perihematoma tissues of Rnf112-/- mice on day 3 post-ICH. The process was along with promoted glial fibrillary acidic protein (GFAP) and Iba1 expression and reduced NeuN levels. Furthermore, ICH-induced increases in toll-like receptor (TLR)-4 and myeloid differentiation primary response protein (MyD88) expression were exacerbated by the loss of Rnf112. The phosphorylated expression of IKKα, inhibitor of NF-κB (IκBα) and nuclear factor-kappa B (NF-κB) induced by ICH in perihematoma tissues of mice was markedly enhanced in Rnf112-/- mice. Rnf112 repression-induced inflammatory response was verified in lipopolysaccharide (LPS)-incubated glial cells. In contrast, over-expressing Rnf112 markedly attenuated ICH-induced brain injury by restraining inflammation via inactivating TLR-4/NF-κB pathway. In summary, our findings suggested that Rnf112 expression was highly involved in the progression of ICH, and targeting Rnf112 signaling might be a promising therapeutic strategy against ICH development.
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Affiliation(s)
- Fan Zhang
- Department of Internal Neurology, No.215 Hospital of Shaanxi Nuclear Industry, Xianyang 712000, China
| | - Chenhong Zhang
- Department of Internal Neurology, No.215 Hospital of Shaanxi Nuclear Industry, Xianyang 712000, China.
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Tsou JH, Yang YC, Pao PC, Lin HC, Huang NK, Lin ST, Hsu KS, Yeh CM, Lee KH, Kuo CJ, Yang DM, Lin JH, Chang WC, Lee YC. Important Roles of Ring Finger Protein 112 in Embryonic Vascular Development and Brain Functions. Mol Neurobiol 2016; 54:2286-2300. [PMID: 26951452 DOI: 10.1007/s12035-016-9812-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 02/22/2016] [Indexed: 11/28/2022]
Abstract
Rnf112 is a member of the RING finger protein family. The expression of Rnf112 is abundant in the brain and is regulated during brain development. Our previous study has revealed that Rnf112 can promote neuronal differentiation by inhibiting the progression of the cell cycle in cell models. In this study, we further revealed the important functions of Rnf112 in embryo development and in adult brain. Our data showed that most of the Rnf112 -/- embryos exhibited blood vascular defects and died in utero. Upon further investigation, we found that the survival rate of homozygous Rnf112 knockout mice in 129/sv and C57BL/6 mixed genetic background was increased. The survived newborns of Rnf112 -/- mice manifested growth retardation as indicated by smaller size and a reduced weight. Although the overall organization of the brain did not appear to be severely affected in Rnf112 -/- mice, using in vivo 3D MRI imaging, we found that when compared to wild-type littermates, brains of Rnf112 -/- mice were smaller. In addition, Rnf112 -/- mice displayed impairment of brain functions including motor balance, and spatial learning and memory. Our results provide important aspects for the study of Rnf112 gene functions.
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Affiliation(s)
- Jen-Hui Tsou
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Ying-Chen Yang
- Department of Biotechnology and Animal Science, College of Bioresources, National Ilan University, Ilan, Taiwan
| | - Ping-Chieh Pao
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Hui-Ching Lin
- Department and Institute of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Brain Research Center, National Yang-Ming University, Taipei, Taiwan
| | - Nai-Kuei Huang
- National Research Institute of Chinese Medicine, Taipei, Taiwan.,Ph.D. Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, 11031, Taiwan
| | - Shih-Ting Lin
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Kuei-Sen Hsu
- Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Che-Ming Yeh
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Kuen-Haur Lee
- Graduate Institute of Cancer Biology and Drug Discovery, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Chu-Jen Kuo
- Ph.D. Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, 11031, Taiwan.,Department of Radiology, Shin Kong Wu Ho-Su Memorial Hospital, School of Medicine, Fu Jen Catholic University, Taipei, Taiwan
| | - De-Ming Yang
- Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei, Taiwan.,Institute of Biophotonics, School of Medical Technology and Engineering, National Yang-Ming University, Taipei, Taiwan
| | - Jiann-Her Lin
- Ph.D. Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, 11031, Taiwan
| | - Wen-Chang Chang
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yi-Chao Lee
- Ph.D. Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, 11031, Taiwan. .,Center for Neurotrauma and Neuroregeneration, Taipei Medical University, Taipei, Taiwan.
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