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Zhang Y, Li D, Gao H, Zhao H, Zhang S, Li T. Rapamycin Alleviates Neuronal Injury and Modulates Microglial Activation After Cerebral Ischemia. Mol Neurobiol 2024:10.1007/s12035-023-03904-9. [PMID: 38224443 DOI: 10.1007/s12035-023-03904-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 12/21/2023] [Indexed: 01/16/2024]
Abstract
Neurons and microglia are sensitive to cerebral microcirculation and their responses play a crucial part in the pathological processes, while they are also the main target cells of many drugs used to treat brain diseases. Rapamycin exhibits beneficial effects in many diseases; however, whether it can affect neuronal injury or alter the microglial activation after global cerebral ischemia remains unclear. In this study, we performed global cerebral ischemia combined with rapamycin treatment in CX3CR1GFP/+ mice and explored the effects of rapamycin on neuronal deficit and microglial activation. Our results showed that rapamycin reduced neuronal loss, neurodegeneration, and ultrastructural damage after ischemia by histological staining and transmission electron microscopy (TEM). Interestingly, rapamycin suppressed de-ramification and proliferation of microglia and reduced the density of microglia. Immunofluorescence staining indicated that rapamycin skewed microglial polarization toward an anti-inflammatory state. Furthermore, rapamycin as well suppressed the activation of astrocytes. Meanwhile, quantitative real-time polymerase chain reaction (qRT-PCR) analyses revealed a significant reduction of pro-inflammatory factors as well as an elevation of anti-inflammatory factors upon rapamycin treatment. As a result of these effects, behavioral tests showed that rapamycin significantly alleviated the brain injury after stroke. Together, our study suggested that rapamycin attenuated neuronal injury, altered microglial activation state, and provided a more beneficial immune microenvironment for the brain, which could be used as a promising therapeutic approach to treat ischemic cerebrovascular diseases.
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Affiliation(s)
- Yue Zhang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, No. 222 South Tianshui Road, Lanzhou, Gansu, 730000, China
- School of Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Donghai Li
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, No. 222 South Tianshui Road, Lanzhou, Gansu, 730000, China
| | - Hao Gao
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, No. 222 South Tianshui Road, Lanzhou, Gansu, 730000, China
| | - Haiyu Zhao
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, No. 222 South Tianshui Road, Lanzhou, Gansu, 730000, China
| | - Shengxiang Zhang
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, No. 222 South Tianshui Road, Lanzhou, Gansu, 730000, China.
| | - Ting Li
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou University, No. 222 South Tianshui Road, Lanzhou, Gansu, 730000, China.
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Sethi GS, Sharma S, Naura AS. PARP inhibition by olaparib alleviates chronic asthma-associated remodeling features via modulating inflammasome signaling in mice. IUBMB Life 2019; 71:1003-1013. [PMID: 30964965 DOI: 10.1002/iub.2048] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 03/29/2019] [Indexed: 01/09/2023]
Abstract
Despite the reported role of poly(ADP-ribose) polymerase (PARP) in asthma inflammation, its contribution during remodeling is not clearly known. The main aim of the current investigation was to examine the potential of olaparib, a pharmacological inhibitor of PARP against airway remodeling using an ovalbumin (OVA)-based murine model of chronic asthma. The results demonstrated that post-challenge olaparib treatment (5 mg/kg i.p., 30 min after OVA exposure) for six weeks (3 days/week) attenuates inflammation, mucus production, and collagen deposition in lungs. Additionally, olaparib blunted the protein expression of STAT-6 and GATA-3 considerably along with a modest reduction in p65-NF-κB phosphorylation. Furthermore, olaparib normalized the OVA-induced redox imbalance as reflected by data on reactive oxygen species, malondialdehyde, protein carbonyls, and reduced glutathione/oxidized glutathione ratio. Interestingly, the protection offered by olaparib was further linked with the altered level of NLRP3 inflammasome-mediated IL-1β release and consequent expression of its downstream targets matrix metalloproteinase-9 and transforming growth factor beta. Suppressed collagen deposition in the lungs correlates well with the reduced expression of vimentin upon olaparib treatment. Finally, olaparib restored the expression of histone deacetylase 2, a steroid-responsive element in asthma. Overall, results suggest that olaparib prevents OVA-induced airway inflammation as well as remodeling via modulating inflammasome signaling in mice. © 2019 IUBMB Life, 1-11, 2019.
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Affiliation(s)
- Gurupreet S Sethi
- Department of Biochemistry, Panjab University, Chandigarh, Punjab, India
| | - Sukriti Sharma
- Department of Biochemistry, Panjab University, Chandigarh, Punjab, India
| | - Amarjit S Naura
- Department of Biochemistry, Panjab University, Chandigarh, Punjab, India
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Dadak M, Jacobs R, Skuljec J, Jirmo AC, Yildiz Ö, Donnerstag F, Baerlecken NT, Schmidt RE, Lanfermann H, Skripuletz T, Schwenkenbecher P, Kleinschnitz C, Tumani H, Stangel M, Pul R. Gain-of-function STAT1 mutations are associated with intracranial aneurysms. Clin Immunol 2017; 178:79-85. [PMID: 28161409 DOI: 10.1016/j.clim.2017.01.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 12/04/2016] [Accepted: 01/30/2017] [Indexed: 11/17/2022]
Abstract
Chronic mucocutaneous candidiasis, characterized by persistent or recurrent fungal infections, represents the clinical hallmark in gain-of-function (GOF) signal transducer and activator of transcription 1 (STAT1) mutation carriers. Several cases of intracranial aneurysms have been reported in patients with GOF STAT1 mutation but the paucity of reported cases likely suggested this association still as serendipity. In order to endorse this association, we link the development of intracranial aneurysms with STAT1 GOF mutation by presenting the two different cases of a patient and her mother, and demonstrate upregulated phosphorylated STAT4 and IL-12 receptor β1 upon stimulation in patient's blood cells. We also detected increased transforming growth factor (TGF)-β type 2 receptor expression, particularly in CD14+ cells, and a slightly higher phosphorylation rate of SMAD3. In addition, the mother of the patient developed disseminated bacille Calmette-Guérin disease after vaccination, speculating that GOF STAT1 mutations may confer a predisposition to weakly virulent mycobacteria.
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Affiliation(s)
- Mete Dadak
- Department of Neuroradiology, Hannover Medical School, Hannover, Germany
| | - Roland Jacobs
- Department of Clinical Immunology and Rheumatology, Hannover Medical School, Hannover, Germany
| | - Jelena Skuljec
- Department of Pediatric Pneumology, Allergology and Neonatology, Hannover Medical School, Germany
| | - Adan Chari Jirmo
- Department of Pediatric Pneumology, Allergology and Neonatology, Hannover Medical School, Germany
| | - Özlem Yildiz
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | - Frank Donnerstag
- Department of Neuroradiology, Hannover Medical School, Hannover, Germany
| | | | - Reinhold Ernst Schmidt
- Department of Clinical Immunology and Rheumatology, Hannover Medical School, Hannover, Germany
| | | | | | | | | | | | - Martin Stangel
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | - Refik Pul
- Department of Neurology, University Clinic Essen, Essen, Germany.
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Oikawa Y, Sasaki N, Niisato M, Nakamura Y, Yamauchi K. A phosphatidylinositol 3-kinase inhibitor strongly suppressed pulmonary vascular remodeling of allergic vasculitis in a murine model. Exp Lung Res 2016; 42:111-20. [PMID: 26986717 DOI: 10.3109/01902148.2016.1157226] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
OBJECTIVES We investigated the effects of pan-class I PI3K inhibitor, ZSTK474 on vascular remodeling using a murine model of allergic vasculitis with eosinophil infiltration. METHODS C57BL/6 mice were sensitized with OVA. The positive controls were exposed to aerosolized OVA daily for 7 days. The other group of mice were administered ZSTK474 (30 mg/kg, p.o. daily) in parallel with daily exposure to aerosolized OVA for 7 days. On the 3rd and 7th day, bronchoalveolar lavage (BAL) was performed and the lungs were excised for pathological analysis. Cell differentials were determined and the concentrations of IL-4, IL-5, IL-13 and TGF-βin BAL fluid were measured. RESULTS The total cell numbers and eosinophil numbers in BALF were greatly reduced in the ZSTK474-treated group on the 3rd and 7th day after exposure to OVA. The numbers of total white blood cells and eosinophils in the peripheral blood were significantly reduced in the ZSTK474-treated group on the 3rd and 7th day after exposure to OVA. The concentrations of IL-4, IL-5, and IL-13 in BAL fluids were also reduced significantly on the 3rd day in the ZSTK474-treated group. The concentrations of TGF-β in BAL fluids were also reduced significantly on the 3rd and 7th day in the ZSTK474-treated group. The pathological scores reduced significantly in the ZSTK474-treated group compared to the control group. CONCLUSION The PI3K inhibitor, ZSTK474 suppressed pulmonary vascular remodeling in the murine model of allergic vasculitis with eosinophil infiltration. PI3K signal transduction may have a critical role in the immunological process that induces allergic vasculitis.
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Affiliation(s)
- Yuka Oikawa
- a Division of Pulmonary Medicine, Allergy and Rheumatology, Department of Internal Medicine , Iwate Medical University School of Medicine , Morioka , Japan
| | - Nobuhito Sasaki
- a Division of Pulmonary Medicine, Allergy and Rheumatology, Department of Internal Medicine , Iwate Medical University School of Medicine , Morioka , Japan
| | - Miyuki Niisato
- a Division of Pulmonary Medicine, Allergy and Rheumatology, Department of Internal Medicine , Iwate Medical University School of Medicine , Morioka , Japan
| | - Yutaka Nakamura
- a Division of Pulmonary Medicine, Allergy and Rheumatology, Department of Internal Medicine , Iwate Medical University School of Medicine , Morioka , Japan
| | - Kohei Yamauchi
- a Division of Pulmonary Medicine, Allergy and Rheumatology, Department of Internal Medicine , Iwate Medical University School of Medicine , Morioka , Japan
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Yin WY, Lee MC, Huang HB, Lu MC. Increased gene expression of TGF-β in peripheral blood mononuclear cells from renal transplant patients with polyomavirus BK viremia. Clin Transplant 2016; 30:393-8. [PMID: 26783039 DOI: 10.1111/ctr.12698] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/24/2015] [Indexed: 01/25/2023]
Abstract
We aimed to investigate the roles of cytokines during polyomavirus BK (BKV) reactivation in renal transplant patients. Forty-eight renal allograft recipients were enrolled, and their sera BKV viral load and mRNA expression levels of cytokines in peripheral blood mononuclear cells were measured by real-time polymerase chain reaction. Patient's age and gene expression levels of interleukin (IL)-2 (10.04 ± 2.63 vs. 8.70 ± 2.40, p = 0.049) and transforming growth factor (TGF)-β (12.58 ± 2.59 vs. 10.89 ± 1.91, p = 0.015) were significantly higher in BKV viremia (+) renal transplant patients. Multivariate logistic regression analysis revealed that age and mRNA expression levels of TGF-β, but not IL-2, significantly correlated with the presence of BKV viremia. Sera BKV viral loads showed a positive correlation with patient age and the levels of TGF-β and IL-6 mRNA. After adjusting for age and sex in the regression model, both age and TGF-β mRNA levels maintained a significant positive association with sera BKV viral loads. Serum TGF-β concentration tended to be higher in BKV viremia (+) patients (p = 0.079). In conclusion, expression levels of TGF-β were found to correlate with both BKV viremia positivity and sera BKV viral loads in renal transplant patients.
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Affiliation(s)
- Wen-Yao Yin
- Division of General Surgery, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi, Taiwan.,School of Medicine, Tzu Chi University, Hualien, Taiwan
| | - Ming-Che Lee
- School of Medicine, Tzu Chi University, Hualien, Taiwan.,Department of General Surgery, Hualien Tzu Chi Medical Center, Hualien, Taiwan
| | - Hsien-Bin Huang
- Department of Life Science and Institute of Molecular Biology, National Chung Cheng University, Chiayi, Taiwan
| | - Ming-Chi Lu
- School of Medicine, Tzu Chi University, Hualien, Taiwan.,Division of Allergy, Immunology and Rheumatology, Dalin Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Chiayi, Taiwan
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