1
|
Chen H, Li B, Zhao X, Yang C, Zhou S, Ma W. Cell-free analysis reveals the role of RG/RGG motifs in DDX3X phase separation and their potential link to cancer pathogenesis. Int J Biol Macromol 2024; 279:135251. [PMID: 39222785 DOI: 10.1016/j.ijbiomac.2024.135251] [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: 06/09/2024] [Revised: 08/20/2024] [Accepted: 08/30/2024] [Indexed: 09/04/2024]
Abstract
The DEAD-box RNA helicase DDX3X is a multifunctional protein involved in RNA metabolism and stress responses. In this study, we investigated the role of RG/RGG motifs in the dynamic process of liquid-liquid phase separation (LLPS) of DDX3X using cell-free assays and explored their potential link to cancer development through bioinformatic analysis. Our results demonstrate that the number, location, and composition of RG/RGG motifs significantly influence the ability of DDX3X to undergo phase separation and form self-aggregates. Mutational analysis revealed that the spacing between RG/RGG motifs and the number of glycine residues within each motif are critical factors in determining the extent of phase separation. Furthermore, we found that DDX3X is co-expressed with the stress granule protein G3BP1 in several cancer types and can undergo co-phase separation with G3BP1 in a cell-free system, suggesting a potential functional interaction between these proteins in phase-separated structures. DDX3X and G3BP1 may interact through their RG/RGG domains and subsequently exert important cellular functions under stress situation. Collectively, our findings provide novel insights into the role of RG/RGG motifs in modulating DDX3X phase separation and their potential contribution to cancer pathogenesis.
Collapse
Affiliation(s)
- Hongran Chen
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Boyang Li
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Xinyue Zhao
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Caini Yang
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Sa Zhou
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China
| | - Wenjian Ma
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, China; Qilu Institute of Technology, Shandong, China.
| |
Collapse
|
2
|
Xu Y, Liu W, Ren L. Role of m6A RNA Methylation in Ischemic Stroke. Mol Neurobiol 2024; 61:6997-7008. [PMID: 38363537 DOI: 10.1007/s12035-024-04029-3] [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: 11/04/2023] [Accepted: 02/09/2024] [Indexed: 02/17/2024]
Abstract
Ischemic stroke is a prominent contributor to global morbidity and mortality rates. The intricate and diverse mechanisms underlying ischemia-reperfusion injury remain poorly comprehended. RNA methylation, an emerging epigenetic modification, plays a crucial role in regulating numerous biological processes, including immunity, DNA damage response, tumorigenesis, metastasis, stem cell renewal, adipocyte differentiation, circadian rhythms, cellular development and differentiation, and cell division. Among the various RNA modifications, N6-methyladenosine (m6A) modification stands as the most prevalent in mammalian mRNA. Recent studies have demonstrated the crucial involvement of m6A modification in the pathophysiological progression of ischemic stroke. This review aims to elucidate the advancements in ischemic stroke-specific investigations pertaining to m6A modification, consolidate the underlying mechanisms implicated in the participation of m6A modification during the onset of ischemic stroke, and deliberate on the potential of m6A modification as a viable therapeutic target for ischemic stroke.
Collapse
Affiliation(s)
- Yayun Xu
- Department of Neurology, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen, 518035, China
| | - Wenqiang Liu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, Anhui Medical University, Hefei, 230000, China
- The Key Laboratory of Anti-Inflammatory and Immune Medicines, Ministry of Education, Hefei, 230000, China
| | - Lijie Ren
- Department of Neurology, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen, 518035, China.
| |
Collapse
|
3
|
Kodavati M, Maloji Rao VH, Provasek VE, Hegde ML. Regulation of DNA damage response by RNA/DNA-binding proteins: Implications for neurological disorders and aging. Ageing Res Rev 2024; 100:102413. [PMID: 39032612 PMCID: PMC11463832 DOI: 10.1016/j.arr.2024.102413] [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: 06/03/2024] [Accepted: 07/05/2024] [Indexed: 07/23/2024]
Abstract
RNA-binding proteins (RBPs) are evolutionarily conserved across most forms of life, with an estimated 1500 RBPs in humans. Traditionally associated with post-transcriptional gene regulation, RBPs contribute to nearly every known aspect of RNA biology, including RNA splicing, transport, and decay. In recent years, an increasing subset of RBPs have been recognized for their DNA binding properties and involvement in DNA transactions. We refer to these RBPs with well-characterized DNA binding activity as RNA/DNA binding proteins (RDBPs), many of which are linked to neurological diseases. RDBPs are associated with both nuclear and mitochondrial DNA repair. Furthermore, the presence of intrinsically disordered domains in RDBPs appears to be critical for regulating their diverse interactions and plays a key role in controlling protein aggregation, which is implicated in neurodegeneration. In this review, we discuss the emerging roles of common RDBPs from the heterogeneous nuclear ribonucleoprotein (hnRNP) family, such as TAR DNA binding protein-43 (TDP43) and fused in sarcoma (FUS) in controlling DNA damage response (DDR). We also explore the implications of RDBP pathology in aging and neurodegenerative diseases and provide a prospective on the therapeutic potential of targeting RDBP pathology mediated DDR defects for motor neuron diseases and aging.
Collapse
Affiliation(s)
- Manohar Kodavati
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston, TX 77047, USA.
| | - Vikas H Maloji Rao
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston, TX 77047, USA
| | - Vincent E Provasek
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston, TX 77047, USA; School of Medicine, Texas A&M University, College Station, TX 77843, USA
| | - Muralidhar L Hegde
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston, TX 77047, USA; School of Medicine, Texas A&M University, College Station, TX 77843, USA; Department of Neurosurgery, Weill Medical College, New York, NY 10065, USA.
| |
Collapse
|
4
|
Yang L, Wu J, Zhang F, Zhang L, Zhang X, Zhou J, Pang J, Xie B, Xie H, Jiang Y, Peng J. Microglia aggravate white matter injury via C3/C3aR pathway after experimental subarachnoid hemorrhage. Exp Neurol 2024; 379:114853. [PMID: 38866102 DOI: 10.1016/j.expneurol.2024.114853] [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: 04/17/2024] [Revised: 05/10/2024] [Accepted: 06/06/2024] [Indexed: 06/14/2024]
Abstract
The activation of glial cells is intimately associated with the pathophysiology of neuroinflammation and white matter injury (WMI) during both acute and chronic phases following subarachnoid hemorrhage (SAH). The complement C3a receptor (C3aR) has a dual role in modulating inflammation and contributes to neurodevelopment, neuroplasticity, and neurodegeneration. However, its impact on WMI in the context of SAH remains unclear. In this study, 175 male C57BL/6J mice underwent SAH through endovascular perforation. Oxyhemoglobin (oxy-Hb) was employed to simulate SAH in vitro. A suite of techniques, including immunohistochemistry, transcriptomic sequencing, and a range of molecular biotechnologies, were utilized to evaluate the activation of the C3-C3aR pathway on microglial polarization and WMI. Results revealed that post-SAH abnormal activation of microglia was accompanied by upregulation of complement C3 and C3aR. The inhibition of C3aR decreased abnormal microglial activation, attenuated neuroinflammation, and ameliorated WMI and cognitive deficits following SAH. RNA-Seq indicated that C3aR inhibition downregulated several immune and inflammatory pathways and mitigated cellular injury by reducing p53-induced death domain protein 1 (Pidd1) and Protein kinase RNA-like ER kinase (Perk) expression, two factors mainly function in sensing and responding to cellular stress and endoplasmic reticulum (ER) stress. The deleterious effects of the C3-C3aR axis in the context of SAH may be related to endoplasmic reticulum (ER) stress-dependent cellular injury and inflammasome formation. Agonists of Perk can exacerbate the cellular injury and neuroinflammation, which was attenuated by C3aR inhibition after SAH. Additionally, intranasal administration of C3a during the subacute phase of SAH was found to decrease astrocyte reactivity and alleviate cognitive deficits post-SAH. This research deepens our understanding of the complex pathophysiology of WMI following SAH and underscores the therapeutic potential of C3a treatment in promoting white matter repair and enhancing functional recovery prognosis. These insights pave the way for future clinical application of C3a-based therapies, promising significant benefits in the treatment of SAH and its related complications.
Collapse
Affiliation(s)
- Lei Yang
- Department of Neurosurgery, The Affiliated Hospital, Southwest Medical University, Luzhou, China; Laboratory of Neurological Diseases and Brain Function, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Jinpeng Wu
- Department of Neurosurgery, The Affiliated Hospital, Southwest Medical University, Luzhou, China; Laboratory of Neurological Diseases and Brain Function, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Fan Zhang
- Department of Neurosurgery, The Affiliated Hospital, Southwest Medical University, Luzhou, China; Sichuan Clinical Research Center for Neurosurgery, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Lifang Zhang
- Sichuan Clinical Research Center for Neurosurgery, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Xianhui Zhang
- Sichuan Clinical Research Center for Neurosurgery, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Jian Zhou
- Department of Neurosurgery, The Affiliated Hospital, Southwest Medical University, Luzhou, China; Sichuan Clinical Research Center for Neurosurgery, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Jinwei Pang
- Department of Neurosurgery, The Affiliated Hospital, Southwest Medical University, Luzhou, China; Laboratory of Neurological Diseases and Brain Function, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Bingqing Xie
- Institute of Brain Science, Southwest Medical University, Luzhou, China
| | - Huangfan Xie
- Institute of Brain Science, Southwest Medical University, Luzhou, China
| | - Yong Jiang
- Department of Neurosurgery, The Affiliated Hospital, Southwest Medical University, Luzhou, China; Laboratory of Neurological Diseases and Brain Function, The Affiliated Hospital, Southwest Medical University, Luzhou, China; Institute of Brain Science, Southwest Medical University, Luzhou, China; Sichuan Clinical Research Center for Neurosurgery, The Affiliated Hospital, Southwest Medical University, Luzhou, China.
| | - Jianhua Peng
- Department of Neurosurgery, The Affiliated Hospital, Southwest Medical University, Luzhou, China; Laboratory of Neurological Diseases and Brain Function, The Affiliated Hospital, Southwest Medical University, Luzhou, China; Academician (Expert) Workstation of Sichuan Province, The Affiliated Hospital, Southwest Medical University, Luzhou, China.
| |
Collapse
|
5
|
Zang J, Wu Y, Su X, Cai K, Ke M, He N, Zhu H, Tan Z, Zhu J, He W, Peng M, Zhang S, Mai H, Xu A, Lu D. FUS Selectively Facilitates circRNAs Packing into Small Extracellular Vesicles within Hypoxia Neuron. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2404822. [PMID: 38924471 DOI: 10.1002/advs.202404822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2024] [Indexed: 06/28/2024]
Abstract
Small extracellular vesicles (sEVs) contain abundant circular RNAs (circRNAs) and are involved in cellular processes, particularly hypoxia. However, the process that packaging of circRNAs into neuronal sEVs under hypoxia is unclear. This study revealed the spatial mechanism of the Fused in Sarcoma protein (FUS) that facilitates the loading of functional circRNAs into sEVs in hypoxia neurons. It is found that FUS translocated from the nucleus to the cytoplasm and is more enriched in hypoxic neuronal sEVs than in normal sEVs. Cytoplasmic FUS formed aggregates with the sEVs marker protein CD63 in cytoplasmic stress granules (SGs) under hypoxic stress. Meanwhile, cytoplasmic FUS recruited of functional cytoplasmic circRNAs to SGs. Upon relief of hypoxic stress and degradation of SGs, cytoplasmic FUS is transported with those circRNAs from SGs to sEVs. Validation of FUS knockout dramatically reduced the recruitment of circRNAs from SGs and led to low circRNA loading in sEVs, which is also confirmed by the accumulation of circRNAs in the cytoplasm. Furthermore, it is showed that the FUS Zf_RanBP domain regulates the transport of circRNAs to sEVs by interacting with hypoxic circRNAs in SGs. Overall, these findings have revealed a FUS-mediated transport mechanism of hypoxia-related cytoplasmic circRNAs loaded into sEVs under hypoxic conditions.
Collapse
Affiliation(s)
- Jiankun Zang
- Department of Neurology and Stroke Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, 510632, China
- Department of Neurology, The First People's Hospital of Foshan, Foshan, 528000, China
- Clinical Neuroscience Institute, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
- Key Lab of Guangzhou Basic and Translational Research of Pan-vascular Diseases, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
| | - Yousheng Wu
- Department of Neurology and Stroke Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, 510632, China
- Clinical Neuroscience Institute, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
- Key Lab of Guangzhou Basic and Translational Research of Pan-vascular Diseases, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
| | - Xuanlin Su
- Department of Neurology and Stroke Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, 510632, China
- Clinical Neuroscience Institute, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
- Key Lab of Guangzhou Basic and Translational Research of Pan-vascular Diseases, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
| | - Kaiwei Cai
- Department of Neurology and Stroke Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, 510632, China
- Clinical Neuroscience Institute, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
- Key Lab of Guangzhou Basic and Translational Research of Pan-vascular Diseases, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
| | - Man Ke
- Department of Neurology and Stroke Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, 510632, China
- Clinical Neuroscience Institute, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
- Key Lab of Guangzhou Basic and Translational Research of Pan-vascular Diseases, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
| | - Niu He
- Department of Neurology and Stroke Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, 510632, China
- Key Lab of Guangzhou Basic and Translational Research of Pan-vascular Diseases, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
| | - Huili Zhu
- Department of Neurology and Stroke Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, 510632, China
- Key Lab of Guangzhou Basic and Translational Research of Pan-vascular Diseases, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
| | - Zefeng Tan
- Department of Neurology, The First People's Hospital of Foshan, Foshan, 528000, China
| | - Jielin Zhu
- Department of Neurology, The Second People's Hospital of Shunde, Foshan, 528300, China
| | - Wensheng He
- Department of Neurology, The Second People's Hospital of Shunde, Foshan, 528300, China
| | - Min Peng
- Department of Neurology and Stroke Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, 510632, China
- Clinical Neuroscience Institute, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
- Key Lab of Guangzhou Basic and Translational Research of Pan-vascular Diseases, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
| | - Shiqing Zhang
- JNU-HKUST Joint Laboratory for Neuroscience and Innovative Drug Research, College of Pharmacy, Jinan University, Guangzhou, 510632, China
| | - Hongcheng Mai
- Department of Neurology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China
| | - Anding Xu
- Department of Neurology and Stroke Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, 510632, China
- Clinical Neuroscience Institute, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
- Key Lab of Guangzhou Basic and Translational Research of Pan-vascular Diseases, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
| | - Dan Lu
- Department of Neurology and Stroke Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, 510632, China
- Clinical Neuroscience Institute, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
- Key Lab of Guangzhou Basic and Translational Research of Pan-vascular Diseases, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, China
| |
Collapse
|
6
|
Sakamuri SSVP, Sure VN, Oruganti L, Wisen W, Chandra PK, Liu N, Fonseca VA, Wang X, Klein J, Katakam PVG. Acute severe hypoglycemia alters mouse brain microvascular proteome. J Cereb Blood Flow Metab 2024; 44:556-572. [PMID: 37944245 PMCID: PMC10981402 DOI: 10.1177/0271678x231212961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 09/12/2023] [Accepted: 10/05/2023] [Indexed: 11/12/2023]
Abstract
Hypoglycemia increases the risk related to stroke and neurodegenerative diseases, however, the underlying mechanisms are unclear. For the first time, we studied the effect of a single episode (acute) of severe (ASH) and mild (AMH) hypoglycemia on mouse brain microvascular proteome. After four-hour fasting, insulin was administered (i.p) to lower mean blood glucose in mice and induce ∼30 minutes of ASH (∼30 mg/dL) or AMH (∼75 mg/dL), whereas a similar volume of saline was given to control mice (∼130 mg/dL). Blood glucose was allowed to recover over 60 minutes either spontaneously or by 20% dextrose administration (i.p). Twenty-four hours later, the brain microvessels (BMVs) were isolated, and tandem mass tag (TMT)-based quantitative proteomics was performed using liquid chromatography-mass spectrometry (LC/MS). When compared to control, ASH significantly downregulated 13 proteins (p ≤ 0.05) whereas 23 proteins showed a strong trend toward decrease (p ≤ 0.10). When compared to AMH, ASH significantly induced the expression of 35 proteins with 13 proteins showing an increasing trend. AMH downregulated only 3 proteins. ASH-induced downregulated proteins are involved in actin cytoskeleton maintenance needed for cell shape and migration which are critical for blood-brain barrier maintenance and angiogenesis. In contrast, ASH-induced upregulated proteins are RNA-binding proteins involved in RNA splicing, transport, and stability. Thus, ASH alters BMV proteomics to impair cytoskeletal integrity and RNA processing which are critical for cerebrovascular function.
Collapse
Affiliation(s)
- Siva SVP Sakamuri
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA, USA
| | - Venkata N Sure
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA, USA
| | - Lokanatha Oruganti
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA, USA
| | - William Wisen
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA, USA
| | - Partha K Chandra
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA, USA
- Neuroscience Program, Tulane Brain Institute, Tulane University, New Orleans, LA, USA
| | - Ning Liu
- Neuroscience Program, Tulane Brain Institute, Tulane University, New Orleans, LA, USA
- Clinical Neuroscience Research Center, New Orleans, LA, USA
- Department of Neurosurgery, Tulane University School of Medicine, New Orleans, LA, USA
| | - Vivian A Fonseca
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA, USA
- Department of Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - Xiaoying Wang
- Neuroscience Program, Tulane Brain Institute, Tulane University, New Orleans, LA, USA
- Clinical Neuroscience Research Center, New Orleans, LA, USA
- Department of Neurosurgery, Tulane University School of Medicine, New Orleans, LA, USA
| | - Jennifer Klein
- Department of Biochemistry & Molecular Biology, Louisiana State University School of Medicine, New Orleans, LA, USA
| | - Prasad VG Katakam
- Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA, USA
- Neuroscience Program, Tulane Brain Institute, Tulane University, New Orleans, LA, USA
- Clinical Neuroscience Research Center, New Orleans, LA, USA
| |
Collapse
|
7
|
Gasull T, Arboix A. Molecular Mechanisms and Pathophysiology of Acute Stroke: Recent Advances and Controversies. Curr Issues Mol Biol 2024; 46:2926-2930. [PMID: 38666912 PMCID: PMC11048782 DOI: 10.3390/cimb46040182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 03/21/2024] [Indexed: 04/28/2024] Open
Abstract
Stroke is a prevalent neurological disorder defined as an abnormality in brain function resulting from the disruption of cerebral circulation [...].
Collapse
Affiliation(s)
- Teresa Gasull
- Cellular and Molecular Neurobiology (CMN) Research Group at Germans Trias i Pujol Research Institute, 08916 Badalona, Barcelona, Spain;
| | - Adrià Arboix
- Cerebrovascular Division, Department of Neurology, Hospital Universitari del Sagrat Cor, Universitat de Barcelona, 08029 Barcelona, Catalonia, Spain
| |
Collapse
|
8
|
Wang Y, She S, Li W, Zhu J, Li X, Yang F, Dai K. Inhibition of cGAS-STING pathway by stress granules after activation of M2 macrophages by human mesenchymal stem cells against drug induced liver injury. Mol Immunol 2024; 165:42-54. [PMID: 38150981 DOI: 10.1016/j.molimm.2023.12.005] [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: 07/08/2023] [Revised: 11/05/2023] [Accepted: 12/14/2023] [Indexed: 12/29/2023]
Abstract
OBJECTIVE Cells can produce stress granules (SGs) to protect itself from damage under stress. The cGAS-STING pathway is one of the important pattern recognition pathways in the natural immune system. This study was investigated whether human mesenchymal stem cells (hMSCs) could protect the liver by inducing M2 macrophages to produce SGs during acute drug induced liver injury (DILI) induced by acetaminophen (APAP). METHODS After intragastric administration of APAP in vivo to induce DILI mice model, hMSCs were injected into the tail vein. The co-culture system of hMSCs and M2 macrophages was established in vitro. It was further use SGs inhibitor anisomicin to intervene M2 macrophages. The liver histopathology, liver function, reactive oxygen species (ROS) level, apoptosis pathway, endoplasmic reticulum stress (ERS) level, SGs markers (G3BP1/TIA-1), cGAS-STING pathway, TNF-α, IL-6, IL-1β mRNA levels in liver tissue and M2 macrophages were observed. RESULTS In vivo experiments, it showed that hMSCs could alleviate liver injury, inhibite the level of ROS, apoptosis and ERS, protect liver function in DILI mice. The mount of M2 was increased in the liver. hMSCs could also induce the production of SGs, inhibit the cGAS-STING pathway and reduce TNF-α, IL-6, IL-1β mRNA expression. The results in vitro showed that hMSCs could induce the production of SGs in macrophages, inhibit the cGAS-STING pathway, promote the secretion of IL-4 and IL-13, and reduce TNF-α, IL-6, IL-1β mRNA level in cells. In the process of IL-4 inducing M2 macrophage activation, anisomycin could inhibit the production of SGs, activate the cGAS-STING pathway, and promote the inflammatory factor TNF-α, IL-6, IL-1β mRNA expression in cells. CONCLUSIONS HMSCs had a protective effect on acute DILI in mice induced by APAP. Its mechanism might involve in activating M2 type macrophages, promoting the production of SGs, inhibiting the cGAS-STING pathway, and reducing the expression of pro-inflammatory factors in macrophages, to reduce hepatocytes damage.
Collapse
Affiliation(s)
- Yao Wang
- Department of Infectious Diseases, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Sha She
- Department of Infectious Diseases, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Wenyuan Li
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Jiling Zhu
- Department of Infectious Diseases, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Xun Li
- Department of Infectious Diseases, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Fan Yang
- Department of Infectious Diseases, Renmin Hospital of Wuhan University, Wuhan 430060, China.
| | - Kai Dai
- Department of Infectious Diseases, Renmin Hospital of Wuhan University, Wuhan 430060, China.
| |
Collapse
|
9
|
Yuan H, Zhu B, Li C, Zhao Z. Ceramide in cerebrovascular diseases. Front Cell Neurosci 2023; 17:1191609. [PMID: 37333888 PMCID: PMC10272456 DOI: 10.3389/fncel.2023.1191609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 05/18/2023] [Indexed: 06/20/2023] Open
Abstract
Ceramide, a bioactive sphingolipid, serves as an important second messenger in cell signal transduction. Under stressful conditions, it can be generated from de novo synthesis, sphingomyelin hydrolysis, and/or the salvage pathway. The brain is rich in lipids, and abnormal lipid levels are associated with a variety of brain disorders. Cerebrovascular diseases, which are mainly caused by abnormal cerebral blood flow and secondary neurological injury, are the leading causes of death and disability worldwide. There is a growing body of evidence for a close connection between elevated ceramide levels and cerebrovascular diseases, especially stroke and cerebral small vessel disease (CSVD). The increased ceramide has broad effects on different types of brain cells, including endothelial cells, microglia, and neurons. Therefore, strategies that reduce ceramide synthesis, such as modifying sphingomyelinase activity or the rate-limiting enzyme of the de novo synthesis pathway, serine palmitoyltransferase, may represent novel and promising therapeutic approaches to prevent or treat cerebrovascular injury-related diseases.
Collapse
|
10
|
Zhou H, Luo J, Mou K, Peng L, Li X, Lei Y, Wang J, Lin S, Luo Y, Xiang L. Stress granules: functions and mechanisms in cancer. Cell Biosci 2023; 13:86. [PMID: 37179344 PMCID: PMC10182661 DOI: 10.1186/s13578-023-01030-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 04/11/2023] [Indexed: 05/15/2023] Open
Abstract
Stress granules (SGs) are non-enveloped structures formed primarily via protein and RNA aggregation under various stress conditions, including hypoxia and viral infection, as well as oxidative, osmotic, and heat-shock stress. SGs assembly is a highly conserved cellular strategy to reduce stress-related damage and promote cell survival. At present, the composition and dynamics of SGs are well understood; however, data on the functions and related mechanisms of SGs are limited. In recent years, SGs have continued to attract attention as emerging players in cancer research. Intriguingly, SGs regulate the biological behavior of tumors by participating in various tumor-associated signaling pathways, including cell proliferation, apoptosis, invasion and metastasis, chemotherapy resistance, radiotherapy resistance, and immune escape. This review discusses the roles and mechanisms of SGs in tumors and suggests novel directions for cancer treatment.
Collapse
Affiliation(s)
- Huan Zhou
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jing Luo
- Department of Cardiology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Kelin Mou
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Lin Peng
- Department of Bone and Joint Surgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Xiaoyue Li
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Yulin Lei
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jianmei Wang
- Department of Pathology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Sheng Lin
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Yuhao Luo
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, China.
- Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan Province, Luzhou, China.
| | - Li Xiang
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, China.
- Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan Province, Luzhou, China.
| |
Collapse
|
11
|
d-allose protects brain microvascular endothelial cells from hypoxic/reoxygenated injury by inhibiting endoplasmic reticulum stress. Neurosci Lett 2023; 793:137000. [PMID: 36473686 DOI: 10.1016/j.neulet.2022.137000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 11/17/2022] [Accepted: 11/30/2022] [Indexed: 12/12/2022]
Abstract
Ischemic stroke is an acute brain disease with a high mortality rate. Currently, the only effective method is to restore the blood supply. But the inflammation and oxidative stress induced by this approach can damage the integrity of the endothelial system, which hampers the patient's outcome. d-allose has the biological activity to protect against ischemia-reperfusion injury, however, the underlying mechanism remains unclear. Here, brain microvascular endothelial cells (RBMECs) were used as the study material to establish an IR-injury model. Cell viability of RBMECs was suppressed after hypoxia/reoxygenation (H/R) treatment and significantly increased after d-allose supplementation. RNAseq results showed 180 differentially expressed genes (DEGs) between the therapy group (H/R + Dal) and the model group (H/R), of which 151 DEGs were restored to control levels by d-allose. Enrichment analysis revealed that DEGs were mainly involved in protein processing in endoplasmic reticulum. 6 DEGs in the unfolded protein response (UPR) pathway were verified by qRT-PCR. All of them were significantly down-regulated by d-allose, indicating that endoplasmic reticulum stress (ERS) was relieved. In addition, d-allose significantly inhibited the phosphorylation level of eIF2α, a marker of ERS. The downstream molecules of Phosphorylation of eIF2α, Gadd45a and Chac1, which trigger cycle arrest and apoptosis, respectively, were also significantly inhibited by d-allose. Thus, we conclude that d-allose inhibits the UPR pathway, attenuates eIF2α phosphorylation and ERS, restores the cell cycle, inhibits apoptosis, and thus enhances endothelial cell tolerance to H/R injury.
Collapse
|
12
|
Tang S, Wang K, Qi X. Neuro-protective effects of n-butylphthalide on carbon monoxide poisoning rats by modulating IL-2, AKT and BCL-2. J Toxicol Sci 2023; 48:495-505. [PMID: 37661366 DOI: 10.2131/jts.48.495] [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] [Indexed: 09/05/2023]
Abstract
Acute carbon monoxide poisoning (CO-poisoning) causes neurotoxicity by inducing necrosis, apoptosis, lipid peroxidation, and oxidative stress. DL-3-n-butylphthalide (NBP) is a synthetic compound originally extracted from the seeds of Chinese celery and based on pure l-3-n-butylphthalide. In ischemia/reperfusion, it exerts neuroprotective effects through its anti-apoptotic, anti-necrotic and antioxidant properties, and activation of pro-survival pathways. Our study performed bioinformatic analysis to identify the differential expression genes. CO-poisoning patients' blood was collected to confirm the findings. Male rats were exposed to CO 3000 ppm for 40 min, and NBP (100 mg/kg/day) was continuously injected intraperitoneally immediately after poisoning and for the next 15 days. After NBP treatment, the rats were evaluated by Morris water maze test. At the end of experiments, blood and brain tissues of the rats were collected to evaluate the expression levels of IL-2, AKT and BCL-2. We found that IL-2 was elevated in CO-poisoning patients and animal models. Brain tissue damage in CO-poisoning rats was significantly alleviated after NBP treatment. Furthermore, NBP increased the expression of IL-2, AKT and BCL-2 in rat CO-poisoning model. NBP showed neuroprotective action by increasing IL-2, AKT, and BCL-2 expressions.
Collapse
Affiliation(s)
- Shengtao Tang
- The Second School of Clinical Medicine, Southern Medical University, China
- Department of Neurology, The First People's Hospital of Chenzhou, China
| | - Kunyu Wang
- Department of Neurology, The First Teaching Hospital of Jilin University, China
| | - Xiaokun Qi
- The Second School of Clinical Medicine, Southern Medical University, China
- Department of Neurology, The Sixth Medical Center of the General Hospital of the Chinese People's Liberation Army, China
| |
Collapse
|
13
|
Zhao Z, Zhang X, Zhang X, Cheng Y, Chen L, Shen Z, Chen B, Wang H, Chen Y, Xuan W, Zhuang Z, Zheng X, Geng Y, Dong G, Guan J, Lin Y, Wu R. Amide Proton Transfer-Weighted Imaging Detects Hippocampal Proteostasis Disturbance Induced by Sleep Deprivation at 7.0 T MRI. ACS Chem Neurosci 2022; 13:3597-3607. [PMID: 36469930 PMCID: PMC9785040 DOI: 10.1021/acschemneuro.2c00494] [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: 08/19/2022] [Accepted: 11/14/2022] [Indexed: 12/09/2022] Open
Abstract
Sleep deprivation leads to hippocampal injury. Proteostasis disturbance is an important mechanism linking sleep deprivation and hippocampal injury. However, identifying noninvasive imaging biomarkers for hippocampal proteostasis disturbance remains challenging. Amide proton transfer-weighted (APTw) imaging is a chemical exchange saturation transfer technique based on the amide protons in proteins and peptides. We aimed to explore the ability of APTw imaging in detecting sleep deprivation-induced hippocampal proteostasis disturbance and its biological significance, as well as its biological basis. In vitro, the feasibility of APTw imaging in detecting changes of the protein state was evaluated, demonstrating that APTw imaging can detect alterations in the protein concentration, conformation, and aggregation state. In vivo, the hippocampal APTw signal declined with increased sleep deprivation time and was significantly lower in sleep-deprived rats than that in normal rats. This signal was positively correlated with the number of surviving neurons counted in Nissl staining and negatively correlated with the expression of glucose-regulated protein 78 evaluated in immunohistochemistry. Differentially expressed proteins in proteostasis network pathways were identified in the hippocampi of normal rats and sleep-deprived rats via mass spectrometry proteomics analysis, providing the biological basis for the change of the hippocampal APTw signal in sleep-deprived rats. These findings demonstrate that APTw imaging can detect hippocampal proteostasis disturbance induced by sleep deprivation and reflect the extent of neuronal injury and endoplasmic reticulum stress.
Collapse
Affiliation(s)
- Zhihong Zhao
- Department of Medical Imaging, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| | - Xiaojun Zhang
- Center
for Core Facilities, Shantou University
Medical College, Shantou515000, China
| | - Xiaolei Zhang
- Department
of Medical Imaging, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| | - Yan Cheng
- Department
of Medical Imaging, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| | - Lihua Chen
- Department
of Medical Imaging, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| | - Zhiwei Shen
- Department
of Medical Imaging, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| | - Beibei Chen
- Department
of Medical Imaging, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| | - Hongzhi Wang
- Department
of Pathology, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| | - Yue Chen
- Department
of Medical Imaging, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| | - Wentao Xuan
- Department
of Medical Imaging, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| | - Zerui Zhuang
- Department
of Medical Imaging, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| | - Xinhui Zheng
- Department
of Medical Imaging, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| | - Yiqun Geng
- Laboratory
of Molecular Pathology, Guangdong Provincial Key Laboratory of Infectious
Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou515000, China
| | - Geng Dong
- Department
of Biochemistry and Molecular Biology, Medical Informatics Research
Center, Shantou University Medical College, Shantou515000, China
| | - Jitian Guan
- Department
of Medical Imaging, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| | - Yan Lin
- Department
of Medical Imaging, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| | - Renhua Wu
- Department of Medical Imaging, Second Affiliated Hospital, Shantou University Medical College, Shantou515000, China
| |
Collapse
|
14
|
Gasull T, Arboix A. Molecular Mechanisms and Pathophysiology of Acute Stroke: Emphasis on Biomarkers in the Different Stroke Subtypes. Int J Mol Sci 2022; 23:ijms23169476. [PMID: 36012743 PMCID: PMC9409332 DOI: 10.3390/ijms23169476] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Accepted: 08/18/2022] [Indexed: 12/14/2022] Open
Affiliation(s)
- Teresa Gasull
- Cellular and Molecular Neurobiology (CMN) Research Group at Germans Trias i Pujol Research Institute, 08916 Badalona, Barcelona, Spain
| | - Adrià Arboix
- Cerebrovascular Division, Department of Neurology, Hospital Universitari del Sagrat Cor, Universitat de Barcelona, 08029 Barcelona, Catalonia, Spain
- Correspondence: ; Tel.: +34-93-4948940
| |
Collapse
|
15
|
Zhang F, Ran Y, Tahir M, Li Z, Wang J, Chen X. Regulation of N6-methyladenosine (m6A) RNA methylation in microglia-mediated inflammation and ischemic stroke. Front Cell Neurosci 2022; 16:955222. [PMID: 35990887 PMCID: PMC9386152 DOI: 10.3389/fncel.2022.955222] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 07/12/2022] [Indexed: 11/17/2022] Open
Abstract
N6-methyladenosine (m6A) is the most abundant post-transcription modification, widely occurring in eukaryotic mRNA and non-coding RNA. m6A modification is highly enriched in the mammalian brain and is associated with neurological diseases like Alzheimer’s disease (AD) and Parkinson’s disease (PD). Ischemic stroke (IS) was discovered to alter the cerebral m6A epi-transcriptome, which might have functional implications in post-stroke pathophysiology. Moreover, it is observed that m6A modification could regulate microglia’s pro-inflammatory and anti-inflammatory responses. Given the critical regulatory role of microglia in the inflammatory processes in the central nervous system (CNS), we speculate that m6A modification could modulate the post-stroke microglial inflammatory responses. This review summarizes the vital regulatory roles of m6A modification in microglia-mediated inflammation and IS. Stroke is associated with a high recurrence rate, understanding the relationship between m6A modification and stroke may help stroke rehabilitation and develop novel therapies in the future.
Collapse
Affiliation(s)
- Fangfang Zhang
- Beijing International Science and Technology Cooperation Base for Antiviral Drugs, Faculty of Environment and Life, Beijing University of Technology, Beijing, China
| | - Yuanyuan Ran
- Department of Rehabilitation, Beijing Rehabilitation Hospital, Capital Medical University, Beijing, China
| | - Muhammad Tahir
- Beijing International Science and Technology Cooperation Base for Antiviral Drugs, Faculty of Environment and Life, Beijing University of Technology, Beijing, China
| | - Zihan Li
- Beijing International Science and Technology Cooperation Base for Antiviral Drugs, Faculty of Environment and Life, Beijing University of Technology, Beijing, China
| | - Jianan Wang
- Beijing International Science and Technology Cooperation Base for Antiviral Drugs, Faculty of Environment and Life, Beijing University of Technology, Beijing, China
| | - Xuechai Chen
- Beijing International Science and Technology Cooperation Base for Antiviral Drugs, Faculty of Environment and Life, Beijing University of Technology, Beijing, China
- *Correspondence: Xuechai Chen,
| |
Collapse
|