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Tan X, Su X, Wang Y, Liang W, Wang D, Huo D, Wang H, Qi Y, Zhang W, Han L, Zhang D, Wang M, Xu J, Feng H. RBM5 induces motor neuron apoptosis in hSOD1 G93A-related amyotrophic lateral sclerosis by inhibiting Rac1/AKT pathways. Brain Res Bull 2024; 216:111049. [PMID: 39142444 DOI: 10.1016/j.brainresbull.2024.111049] [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: 06/03/2024] [Revised: 07/26/2024] [Accepted: 08/11/2024] [Indexed: 08/16/2024]
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disorder distinguished by gradual depletion of motor neurons. RNA binding motif protein 5 (RBM5), an abundantly expressed RNA-binding protein, plays a critical role in the process of cellular death. However, little is known about the role of RBM5 in the pathogenesis of ALS. Here, we found that RBM5 was upregulated in ALS hSOD1G93A-NSC34 cell models and hSOD1G93A mice due to a reduction of miR-141-5p. The upregulation of RBM5 increased the apoptosis of motor neurons by inhibiting Rac1-mediated neuroprotection. In contrast, genetic knockdown of RBM5 rescued motor neurons from hSOD1G93A-induced degeneration by activating Rac1 signaling. The neuroprotective effect of RBM5-knockdown was significantly inhibited by the Rac1 inhibitor, NSC23766. These findings suggest that RBM5 could potentially serve as a therapeutic target in ALS by activating the Rac1 signalling.
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Affiliation(s)
- Xingli Tan
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin 150000, China
| | - Xiaoli Su
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin 150000, China
| | - Ying Wang
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin 150000, China
| | - Weiwei Liang
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin 150000, China; Department of Neurology, The Second Affiliated Hospital of Harbin Medical University, Harbin 150000, China
| | - Di Wang
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin 150000, China
| | - Di Huo
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin 150000, China
| | - Hongyong Wang
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin 150000, China
| | - Yan Qi
- Department of Neurology, The Second Affiliated Hospital of Shanxi Medical University, Taiyuan 030000, China
| | - Wenmo Zhang
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin 150000, China
| | - Ling Han
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin 150000, China
| | - Dongmei Zhang
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin 150000, China
| | - Ming Wang
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin 150000, China
| | - Jing Xu
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin 150000, China
| | - Honglin Feng
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin 150000, China.
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Zhu C, Hu H, Ma Y, Xiong S, Zhu D. Vav1-dependent Rac1 activation mediates hypoxia-induced gemcitabine resistance in pancreatic ductal adenocarcinoma cells through upregulation of HIF-1α expression. Cell Biol Int 2023; 47:1835-1842. [PMID: 37545183 DOI: 10.1002/cbin.12074] [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: 05/05/2022] [Revised: 04/21/2023] [Accepted: 07/09/2023] [Indexed: 08/08/2023]
Abstract
Hypoxia has been shown to induce gemcitabine (GEM) resistance in pancreatic ductal adenocarcinoma (PDAC) cells, however, the underlying mechanisms remain to be clarified. In the present study, we investigated whether activation of Vav1/Rac1/HIF-1α axis is responsible for hypoxia-induced GEM resistance in PDAC cells. Our results showed that Rac1 activation contributed to hypoxia-induced GEM resistance in PANC-1 cells. Hypoxia treatment led to an increased expression level of Vav1, which was responsible for Rac1 activation and GEM resistance in PDAC cells. Furthermore, Rac1 mediated hypoxia-induced GEM resistance by upregulating HIF-1α in PDAC cells. Taken together, these findings suggest that hypoxia induces GEM resistance in PDAC cells by activating the Vav1/Rac1/HIF-1α signaling pathway.
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Affiliation(s)
- Congyuan Zhu
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
- Department of General Surgery, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Hao Hu
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Ye Ma
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Shuming Xiong
- Department of Hepatobiliary and Pancreatic Surgery, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Dongming Zhu
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
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Zu C, Li J, He X, Ji L, Li X. Identification of a circRNA-mediated comprehensive ceRNA network in spinal cord injury pathogenesis. Exp Biol Med (Maywood) 2022; 247:931-944. [PMID: 35410505 DOI: 10.1177/15353702221082929] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
RNAs are closely associated with human diseases; however, immune-related genes (IRGs) and their potential regulatory networks in relation to spinal cord injury (SCI) are still poorly understood. Here, we investigated the key IRGs as well as the competing endogenous RNA (ceRNA) mechanisms that are associated with SCI pathogenesis based on microarray datasets and the use of a rat SCI model. Specifically, four independent SCI microarray datasets from Gene Expression Omnibus (GEO) database were analyzed and, thereafter, differentially expressed IRGs were annotated via Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses. Furthermore, based on the GEO datasets, differentially expressed RNAs (DERNAs), including DEcircRNAs, DEmiRNAs, and DEmRNAs were identified and interactions between them were also predicted using online databases, and to construct a circular RNA (circRNA) mediated ceRNA network, candidate RNAs were also identified. Furthermore, the support vector machine (SVM) and least absolute shrinkage and selection operator (LASSO) methods were used for the identification of critical DERNAs, while differential gene expression was validated using the GSE20907 dataset. Our results were as follows. In the SCI microarray datasets, 32, 58, and 74 DEIRGs, DEcircRNAs, and DEmiRNAs were identified, respectively. In addition, GO and KEGG analyses showed that the DEIRGs were primarily enriched in neutrophil-mediated immunity and nuclear factor-kappa B (NF-κB) and hypoxia-inducible factor-1 (HIF-1) signaling pathways, and based on LASSO and SVM screening, PLXNB2 was identified as a DEIRG, while hsa_circ_0026646 was identified as the key circRNA, showing a higher SCI expression. Furthermore, our results proved that PLXNB2 and hsa_circ_0026646 were upregulated in SCI, whereas miR-331-3p was downregulated, and, interestingly, similar expression profiles were confirmed using the rat SCI model. Furthermore, fluorescent reporter assay indicated that both hsa_circ_0026646 and PLXNB2 have miR-331-3p target sites, and the ceRNA hypothesis suggested the dysregulation of hsa_circ_0026646, miR-331-3p, and PLXNB2 in SCI. Thus, our results suggested that in SCI pathogenesis, hsa_circ_0026646 correlates with PLXNB2 by targeting miR-331-3p.
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Affiliation(s)
- Chao Zu
- Department of Orthopedics, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
- Department of Surgical Oncology, Shaanxi Provincial People's Hospital, The Affiliated Hospital of Northwestern Polytechnical University and Xi'an Jiaotong University, Xi'an 710068, China
| | - Jingyuan Li
- Department of Orthopedics, Shaanxi Provincial People's Hospital, The Affiliated Hospital of Northwestern Polytechnical University and Xi'an Jiaotong University, Xi'an 710068, China
| | - Xijing He
- Department of Orthopedics, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
- Orthopaedic Hospital, Xi'an International Rehabilitation Medical Center, Xi'an 710065, China
| | - Le Ji
- Department of Orthopedics, Shaanxi Provincial People's Hospital, The Affiliated Hospital of Northwestern Polytechnical University and Xi'an Jiaotong University, Xi'an 710068, China
| | - Xia Li
- Basic Medical College, The Fourth Military Medical University, Xi'an 710032, China
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Wang Y, Bibi M, Min P, Deng W, Zhang Y, Du J. SOX2 promotes hypoxia-induced breast cancer cell migration by inducing NEDD9 expression and subsequent activation of Rac1/HIF-1α signaling. Cell Mol Biol Lett 2019; 24:55. [PMID: 31462898 PMCID: PMC6704701 DOI: 10.1186/s11658-019-0180-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 08/14/2019] [Indexed: 12/22/2022] Open
Abstract
Background Hypoxia, a major condition associated with the tumor microenvironment, stimulates the migration of cancer cells. SOX2 is a powerful transcription factor that shows higher expression in several cancers, however, its role in hypoxia-induced breast cancer cell migration remains largely elusive. Methods The human breast cancer cell lines MDA-MB-231 and MDA-MB-468 were cultured under hypoxic conditions. The cell migration rate was determined using the wound-healing and transwell assays. The protein levels of SOX2, NEDD9 and HIF-1α were evaluated via western blotting analysis. The NEDD9 mRNA levels were evaluated using qPCR. The activation of Rac1 was detected with the pulldown assay. The binding of SOX2 to the NEDD9 promoter was checked using the luciferase reporter assay. We also transfected breast cancer cells with specific siRNA for SOX2, NEDD9 or the Rac1 inactive mutant (T17 N) to investigate the role of SOX2, NEDD9 and Rac1 in the response to hypoxia. Results Hypoxia markedly increased SOX2 protein levels in a time-dependent manner. SiRNA-mediated disruption of SOX2 inhibited cell migration under hypoxic conditions. Hypoxia also significantly augmented the NEDD9 mRNA and protein levels. Interestingly, SOX2 is a positive transcriptional regulator of NEDD9. Knockdown of SOX2 inhibited hypoxia-induced NEDD9 mRNA and protein expressions. Furthermore, hypoxia-induced upregulation of Rac1 activity and HIF-1α expression was attenuated by SOX2 or NEDD9 silencing, and Rac1-T17 N abolished HIF-1α expression as well as cell migration in cells subjected to hypoxia. Conclusions Our results highlight the essential role of SOX2 in breast cancer cell motility. The upregulation of SOX2 under hypoxic conditions may facilitate NEDD9 transcription and expression, and subsequent activation of Rac1 and HIF-1α expression. This could accelerate breast cancer cell migration.
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Affiliation(s)
- Yueyuan Wang
- 1Department of Physiology, Nanjing Medical University, 101 Longmian Avenue, Jiangning District, Nanjing, 211166 Jiangsu China
| | - Maria Bibi
- 1Department of Physiology, Nanjing Medical University, 101 Longmian Avenue, Jiangning District, Nanjing, 211166 Jiangsu China
| | - Pengxiang Min
- 1Department of Physiology, Nanjing Medical University, 101 Longmian Avenue, Jiangning District, Nanjing, 211166 Jiangsu China
| | - Wenjie Deng
- 1Department of Physiology, Nanjing Medical University, 101 Longmian Avenue, Jiangning District, Nanjing, 211166 Jiangsu China
| | - Yujie Zhang
- 1Department of Physiology, Nanjing Medical University, 101 Longmian Avenue, Jiangning District, Nanjing, 211166 Jiangsu China.,2Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Personalized Cancer Medicine, Nanjing Medical University, 101 Longmian Avenue, Jiangning District, Nanjing, 211166 Jiangsu China
| | - Jun Du
- 1Department of Physiology, Nanjing Medical University, 101 Longmian Avenue, Jiangning District, Nanjing, 211166 Jiangsu China.,2Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Personalized Cancer Medicine, Nanjing Medical University, 101 Longmian Avenue, Jiangning District, Nanjing, 211166 Jiangsu China
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Costa V, Carina V, Conigliaro A, Raimondi L, De Luca A, Bellavia D, Salamanna F, Setti S, Alessandro R, Fini M, Giavaresi G. miR-31-5p Is a LIPUS-Mechanosensitive MicroRNA that Targets HIF-1α Signaling and Cytoskeletal Proteins. Int J Mol Sci 2019; 20:E1569. [PMID: 30925808 PMCID: PMC6480017 DOI: 10.3390/ijms20071569] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 03/19/2019] [Accepted: 03/25/2019] [Indexed: 12/16/2022] Open
Abstract
The roles of low-intensity pulsed ultrasound (LIPUS) and microRNAs (miRNAs) on hMSCs commitments have already been investigated; however, the effects of the application of their co-treatments in an in vitro cell model are still unknown. Our previous studies demonstrated that (i) LIPUS modulated hMSCs cytoskeletal organization and (ii) miRNA-675-5p have a role in HIF-1α signaling modulation during hMSCs osteoblast commitment. We investigated for the first time the role of LIPUS as promoter tool for miRNA expression. Thanks to bioinformatic analysis, we identified miR-31-5p as a LIPUS-induced miRNA and investigated its role through in vitro studies of gain and loss of function. Results highlighted that LIPUS stimulation induced a hypoxia adaptive cell response, which determines a reorganization of cell membrane and cytoskeleton proteins. MiR-31-5p gain and loss of function studies, demonstrated as miR-31-5p overexpression, were able to induce hypoxic and cytoskeletal responses. Moreover, the co-treatments LIPUS and miR-31-5p inhibitor abolished the hypoxic responses including angiogenesis and the expression of Rho family proteins. MiR-31-5p was identified as a LIPUS-mechanosensitive miRNAs and may be considered a new therapeutic option to promote or abolish hypoxic response and cytoskeletal organization on hMSCs during the bone regeneration process.
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Affiliation(s)
- Viviana Costa
- IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy.
| | - Valeria Carina
- IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy.
| | - Alice Conigliaro
- Department of BioMedicine, Neuroscience and Advanced Diagnostics (Bi.N.D), University of Palermo, 90100 Palermo, Italy.
| | | | - Angela De Luca
- IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy.
| | | | - Francesca Salamanna
- IRCCS Istituto Ortopedico Rizzoli, Laboratory of Preclinical and Surgical Studies, 40136 Bologna, Italy.
| | | | - Riccardo Alessandro
- Department of BioMedicine, Neuroscience and Advanced Diagnostics (Bi.N.D), University of Palermo, 90100 Palermo, Italy.
- Institute of Biomedicine and Molecular Immunology (IBIM), National Research Council, 90100 Palermo, Italy.
| | - Milena Fini
- IRCCS Istituto Ortopedico Rizzoli, Laboratory of Preclinical and Surgical Studies, 40136 Bologna, Italy.
| | - Gianluca Giavaresi
- IRCCS Istituto Ortopedico Rizzoli, Laboratory of Preclinical and Surgical Studies, 40136 Bologna, Italy.
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Malinovskaya NA, Morgun AV, Pisareva NV, Osipova ED, Boytsova EB, Panina YA, Zhukov EL, Medvedeva NN, Salmina AB. Changes in the Permeability and Expression of Markers of the Structural and Functional Integrity of the Blood–Brain Barrier under Early Postnatal Hypoxia in vivo. NEUROCHEM J+ 2018. [DOI: 10.1134/s1819712418030078] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Chronic asthma-induced behavioral and hippocampal neuronal morphological changes are concurrent with BDNF, cofilin1 and Cdc42/RhoA alterations in immature mice. Brain Res Bull 2018; 143:194-206. [PMID: 30227235 DOI: 10.1016/j.brainresbull.2018.09.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 09/03/2018] [Accepted: 09/11/2018] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Recent studies have found that persistent hypoxia caused by chronic asthma, especially during childhood, affects the development and function of the brain, but the mechanism is unclear. In the present study, BDNF and its signal pathway was investigated in mediating chronic asthma induced-neuronal changes that lead to behavior alterations. METHODS The chronic asthma model was induced by sensitization with ovalbumin for more than 9 weeks in immature mice. Morris water maze test (MWMT), open field test (OFT) and elevated plus maze test (EPMT) were used to conduct behavioral evaluation. Neuronal morphology in hippocampal CA1, CA3 and DG was assessed using ImageJ's Sholl plugin and RESCONSTRUCT software. BDNF signaling pathway related molecules was determined by Western blotting. RESULTS Chronic asthma does affect the behavioral performances of immature mice evaluated in MWMT, OFT, and EPMT. The analysis by three-dimensional reconstruction software found that following the behavioral alteration of asthmatic mice, dendritic changes also occurred in hippocampal neurons, including shortened dendrite length, significantly reduced number of dendritic branches, decreased density of dendritic spines, and reduced percentage of functional dendritic spine types. At the same time, by immunofluorescence and western blotting, we also found that alterations in dendritic morphology were consistent with activation of cofilin1 and changes in BDNF-Cdc42/RhoA levels. Some of the changes mentioned above can be alleviated by intranasal administration of budesonide. CONCLUSION Our data suggest that response similar to nicotine withdrawal or/and hypoxia induced by childhood chronic asthma enhances the BDNF-Cdc42/RhoA signaling pathway and activates cofilin1, leading to the remodeling of actin, causing the loss of dendritic spines and atrophy of dendrites, eventually resulting in behavioral alterations.
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Li Y, Huang C, Feng P, Jiang Y, Wang W, Zhou D, Chen L. Aberrant expression of miR-153 is associated with overexpression of hypoxia-inducible factor-1α in refractory epilepsy. Sci Rep 2016; 6:32091. [PMID: 27554040 PMCID: PMC4995460 DOI: 10.1038/srep32091] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 08/02/2016] [Indexed: 02/06/2023] Open
Abstract
Evidence suggest that overexpression of hypoxia-inducible factor-1α (HIF-1α) is linked to multidrug resistance of epilepsy. Here we explored whether aberrant expression of HIF-1α is regulated by miRNAs. Genome-wide microRNA expression profiling was performed on temporal cortex resected from mesial temporal lobe epilepsy (mTLE) patients and age-matched controls. miRNAs that are putative regulator of HIF-1α were predicted via target scan and confirmed by real-time quantitative polymerase chain reaction (RT-qPCR). Mimics or miRNA morpholino inhibitors were transfected in astrocytes and luciferase reporter assay was applied to detect HIF-11α expression. Microarray profiling identified down-regulated miR-153 as a putative regulator of HIF-1α in temporal cortex resected from surgical mTLE patients. RT-qPCR confirmed down-regulation of miR-153 in plasma of mTLE patients in an independent validation cohort. Knockdown of miR-153 significantly enhanced expression of HIF-1α while forced expression of miR-153 dramatically inhibited HIF-1α expression in pharmacoresistant astrocyte model. Luciferase assay established that miR-153 might inhibit HIF-1α expression via directly targeting two binding sites in the 3′UTR region of HIF-1α transcript. These data suggest that down-regulation of miR-153 may contribute to enhanced expression of HIF-1α in mTLE and serve as a novel biomarker and treatment target for epilepsy.
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Affiliation(s)
- Yaohua Li
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Cheng Huang
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Peimin Feng
- Department of integrated traditional and western medicine, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, Sichuan, People's Republic of China
| | - Yanping Jiang
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Wei Wang
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Dong Zhou
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Lei Chen
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
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