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Li R, Yao S, Wei F, Chen M, Zhong Y, Zou C, Chen L, Wei L, Yang C, Zhang X, Liu Y. Downregulation of miR-181c-5p in Alzheimer's disease weakens the response of microglia to Aβ phagocytosis. Sci Rep 2024; 14:11487. [PMID: 38769091 PMCID: PMC11106282 DOI: 10.1038/s41598-024-62347-x] [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: 02/27/2024] [Accepted: 05/15/2024] [Indexed: 05/22/2024] Open
Abstract
Alzheimer's disease (AD) is an age-associated neurodegenerative disease. Recently, studies have demonstrated the potential involvement of microRNA-181c-5p (miR-181c-5p) in AD. However, the mechanism through which miR-181c-5p is responsible for the onset and progression of this disease remains unclear, and our study aimed to explore this problem. Differential expression analysis of the AD dataset was performed to identify dysregulated genes. Based on hypergeometric analysis, AD differential the upstream regulation genes miR-181c-5p was found. We constructed a model where SH-SY5Y and BV2 cells were exposed to Aβ1-42 to simulate AD. Levels of tumor necrosis factor-alpha, interleukin-6, and IL-1β were determined using enzyme-linked immunosorbent assay or reverse transcription quantitative polymerase chain reaction. Phosphorylation levels of p-P38 and P38 were detected by Western blot. The level of apoptosis in BV2 cells under Aβ1-42 stress was exacerbated by miR-181c-5p mimic. Downregulated miR-181c-5p impaired the phagocytosis and degradation of Aβ by BV2 cells. The release of proinflammatory cytokines in BV2 cells with Aβ1-42 stress was alleviated by miR-181c-5p upregulation. Additionally, miR-181c-5p downregulation alleviated the phosphorylation of P38 in Aβ1-42-induced SH-SY5Y cells. In conclusion, miR-181c-5p improves the phagocytosis of Aβ by microglial cells in AD patients, thereby reducing neuroinflammation.
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Affiliation(s)
- Rongjie Li
- Department of Geriatrics, The Fifth Affiliated Hospital of Guangxi Medical University, No.89 Qixing Road, Nanning, 530021, China
- Department of Geriatrics, The First People's Hospital of Nanning, Nanning, China
| | - Shanshan Yao
- Department of Geriatrics, The Fifth Affiliated Hospital of Guangxi Medical University, No.89 Qixing Road, Nanning, 530021, China
- Department of Geriatrics, The First People's Hospital of Nanning, Nanning, China
| | - Feijie Wei
- Department of Geriatrics, The Fifth Affiliated Hospital of Guangxi Medical University, No.89 Qixing Road, Nanning, 530021, China
- Department of Geriatrics, The First People's Hospital of Nanning, Nanning, China
| | - Meixiang Chen
- Department of Geriatrics, The Fifth Affiliated Hospital of Guangxi Medical University, No.89 Qixing Road, Nanning, 530021, China
- Department of Geriatrics, The First People's Hospital of Nanning, Nanning, China
| | - Yuanli Zhong
- Department of Neurology, The First People's Hospital of Nanning, Nanning, China
| | - Chun Zou
- Department of Neurology, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Liechun Chen
- Department of Neurology, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Lichun Wei
- Department of Geriatrics, The Fifth Affiliated Hospital of Guangxi Medical University, No.89 Qixing Road, Nanning, 530021, China
- Department of Geriatrics, The First People's Hospital of Nanning, Nanning, China
| | - Chunxia Yang
- Department of Geriatrics, The Fifth Affiliated Hospital of Guangxi Medical University, No.89 Qixing Road, Nanning, 530021, China
- Department of Geriatrics, The First People's Hospital of Nanning, Nanning, China
| | - Xiyuan Zhang
- Department of Geriatrics, The Fifth Affiliated Hospital of Guangxi Medical University, No.89 Qixing Road, Nanning, 530021, China.
- Department of Geriatrics, The First People's Hospital of Nanning, Nanning, China.
| | - Ying Liu
- Department of Geriatrics, The Fifth Affiliated Hospital of Guangxi Medical University, No.89 Qixing Road, Nanning, 530021, China.
- Department of Geriatrics, The First People's Hospital of Nanning, Nanning, China.
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Shibata A, Yamaguchi F, Sasaki K, Yokobori S, Morita A. Primary Central Nervous System Lymphoma in a Patient with Down Syndrome. J NIPPON MED SCH 2023; 90:346-350. [PMID: 35644559 DOI: 10.1272/jnms.jnms.2023_90-502] [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: 11/19/2022]
Abstract
Intracranial tumors are rare in persons with Down syndrome. Although germ cell tumors and gliomas have been reported in Down syndrome, primary central nervous system lymphoma (PCNSL) has not. We report a case of PCNSL in a 48-year-old man with Down syndrome and no history of malignant tumors. He visited our hospital for evaluation of left hemiparesis and gait disturbance. A thorough examination revealed brain tumors, and analysis of a biopsy specimen of the tumor confirmed a diagnosis of PCNSL. The final pathological diagnosis was diffuse large B-cell lymphoma of the central nervous system. Chemotherapy with rituximab, methotrexate, procarbazine, and vincristine was administered, and whole-brain irradiation was planned in conjunction with chemotherapy. It is unclear whether chromosomal abnormalities related to Down syndrome were involved in the development of PCNSL. Further molecular biological analysis may clarify the mechanism of combined Down syndrome and PCNSL.
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Affiliation(s)
- Ami Shibata
- Department of Emergency and Critical Care Medicine, Nippon Medical School Tama Nagayama Hospital
- Department of Emergency and Critical Care Medicine, Nippon Medical School
| | - Fumio Yamaguchi
- Department of Neurosurgical Surgery, Nippon Medical School
- Department of Neurosurgery for Community Health, Nippon Medical School
| | - Kazuma Sasaki
- Department of Emergency and Critical Care Medicine, Nippon Medical School
| | - Shoji Yokobori
- Department of Emergency and Critical Care Medicine, Nippon Medical School
| | - Akio Morita
- Department of Neurosurgical Surgery, Nippon Medical School
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Elzayat EM, Shahien SA, El-Sherif AA, Hosney M. Therapeutic potential of stem cells and acitretin on inflammatory signaling pathway-associated genes regulated by miRNAs 146a and 155 in AD-like rats. Sci Rep 2023; 13:9613. [PMID: 37311848 DOI: 10.1038/s41598-023-36772-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 06/09/2023] [Indexed: 06/15/2023] Open
Abstract
Alzheimer's disease (AD) is one of the most common causes of dementia. Several drugs are used to improve the symptoms, but do not stop AD progression. There are more promising treatments that may have a significant role in AD diagnosis and treatment such as miRNAs and stem cells. The present study aims to develop a new approach for AD treatment by mesenchymal stem cells (MSCs) and/or acitretin with special reference to inflammatory signaling pathway as NF-kB and its regulator miRNAs in AD-like rat model. Fourty-five male albino rats were allotted for the present study. The experimental periods were divided into induction, withdrawal, and therapeutic phases. Expression levels of miR-146a, miR-155, necrotic, growth and inflammatory genes were assessed using RT-qPCR. Histopathological examination of brain tissues was performed in different rat groups. The normal physiological, molecular, and histopathological levels were restored after treatment with MSCs and/or acitretin. The present study demonstrates that the miR-146a and miR-155 might be used as promising biomarkers for AD. MSCs and/or acitretin proved their therapeutic potential in restoring the expression levels of targeted miRNAs and their related genes concerning NF-kB signaling pathway.
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Affiliation(s)
- Emad M Elzayat
- Zoology Department, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Sherif A Shahien
- Biotechnology/Bimolecular Chemistry Program, Faculty of Science, Helwan University, Cairo, Egypt
| | - Ahmed A El-Sherif
- Department of Chemistry, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Mohamed Hosney
- Zoology Department, Faculty of Science, Cairo University, Giza, 12613, Egypt.
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Advanced glycation end products induce Aβ 1-42 deposition and cognitive decline through H19/miR-15b/BACE1 axis in diabetic encephalopathy. Brain Res Bull 2022; 188:187-196. [PMID: 35961529 DOI: 10.1016/j.brainresbull.2022.08.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 07/26/2022] [Accepted: 08/08/2022] [Indexed: 11/23/2022]
Abstract
OBJECTIVE Diabetic encephalopathy (DE), a chronic complication of diabetes, is characterized by decline of cognitive function. The molecular mechanism of DE remains unclear. The purpose of this study is to evaluate the roles of advanced glycation end products (AGEs) in the pathogenesis of DE and investigate its underlying mechanisms in this process. METHODS DE rats were developed by incorporating a high-fat diet and streptozotocin injection followed by the Morris Water Maze test. HT-22 cells were used to mimic the in vitro neuronal injuries of DE. Expression levels of long non-coding RNA H19, miR-15b and β-site amyloid precursor protein cleaving enzyme 1 (BACE1) mRNA in the hippocampus of DE rats or HT-22 cells were detected by quantitative real-time polymerase chain reaction (qRT-PCR). The levels of BACE1 proteins were analyzed by western blotting or immunohistochemical staining. The contents of Aβ1-42 in supernatant of the cell culture were analyzed by enzyme-linked immu-nosorbent assay (ELISA). The relationship between H19 or BACE1 and miR-15b was verified with dual-luciferase reporter assay. RESULTS We found that the accumulation of Aβ1-42 and the phosphorylation of Tau (Ser404) were increased in the hippocampus CA3 regionof DE rats. MiR-15b was downregulated while H19 and BACE1 were upregulated in the hippocampus CA3 regionof DE rats and AGEs-treated HT-22 cells. The expression of BACE1 protein was negatively regulated by miR-15b at the post-transcriptional level in HT-22 cells. In vivo, administration of miR-15b mimics by the intranasal delivery markedly decreased the BACE1 protein in hippocampal CA3 region and improved the cognitive decline in DE rats. Besides, the luciferase activity assay confirmed the binding site of miR-15b to both the 3'-untranslated region (3'-UTR) of BACE1 mRNA and H19. Then, miR-15b inhibitor reversed H19 knockdown-mediated decrease of Aβ1-42 level in AGEs-treated HT-22 cells. CONCLUSION These results suggested that AGEs induced Aβ1-42 deposition andcognitive decline through H19/miR-15b/ BACE1 axis in DE.
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Li X, Gong Y, Lin X, Lin Q, Luo J, Yu T, Xu J, Chen L, Xu L, Hu Y. Down-regulation of microRNA-155 suppressed Candida albicans induced acute lung injury by activating SOCS1 and inhibiting inflammation response. J Microbiol 2022; 60:402-410. [PMID: 35157222 PMCID: PMC8853013 DOI: 10.1007/s12275-022-1663-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/03/2022] [Accepted: 01/04/2022] [Indexed: 10/31/2022]
Abstract
Acute lung injury caused by Candida albicans could result in high mortality and morbidity. MicroRNA-155 (miR-155) and suppressor of cytokine signaling 1 (SOCS1) have been believed to play a key in the regulation of inflammatory response. Whether miR-155/SOCS1 axis could regulate the acute lung injury caused by C. albicans has not been reported. The acute lung injury animal model was established with acute infection of C. albicans. miR-155 inhibitor, miR-155 mimic, and sh-SOCS1 were constructed. The binding site between miR-155 and SOCS1 was identified with dual luciferase reporter assay. Knockdown of miR-155 markedly inhibited the germ tube formation of C. albicans. Knockdown of miR-155 significantly up-regulated the expression of SOCS1, and the binding site between miR-155 and SOCS1 was identified. Knockdown of miR-155 improved the acute lung injury, suppressed inflammatory factors and fungus loading through SOCS1. Knockdown of SOCS1 greatly reversed the influence of miR-155 inhibitor on the cell apoptosis in vitro. The improvement of acute lung injury caused by C. albicans, suppression of inflammatory response and C. albicans infection, and inhibitor of cell apoptosis were achieved by knocking down miR-155 through SOCS1. This research might provide a new thought for the prevention and treatment of acute lung injury caused by C. albicans through targeting miR-155/SOCS1 axis.
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