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Wang Y, Tian J, Liu D, Li T, Mao Y, Zhu C. Microglia in radiation-induced brain injury: Cellular and molecular mechanisms and therapeutic potential. CNS Neurosci Ther 2024; 30:e14794. [PMID: 38867379 PMCID: PMC11168970 DOI: 10.1111/cns.14794] [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: 11/23/2023] [Revised: 05/15/2024] [Accepted: 05/23/2024] [Indexed: 06/14/2024] Open
Abstract
BACKGROUND Radiation-induced brain injury is a neurological condition resulting from radiotherapy for malignant tumors, with its underlying pathogenesis still not fully understood. Current hypotheses suggest that immune cells, particularly the excessive activation of microglia in the central nervous system and the migration of peripheral immune cells into the brain, play a critical role in initiating and progressing the injury. This review aimed to summarize the latest advances in the cellular and molecular mechanisms and the therapeutic potential of microglia in radiation-induced brain injury. METHODS This article critically examines recent developments in understanding the role of microglia activation in radiation-induced brain injury. It elucidates associated mechanisms and explores novel research pathways and therapeutic options for managing this condition. RESULTS Post-irradiation, activated microglia release numerous inflammatory factors, exacerbating neuroinflammation and facilitating the onset and progression of radiation-induced damage. Therefore, controlling microglial activation and suppressing the secretion of related inflammatory factors is crucial for preventing radiation-induced brain injury. While microglial activation is a primary factor in neuroinflammation, the precise mechanisms by which radiation prompts this activation remain elusive. Multiple signaling pathways likely contribute to microglial activation and the progression of radiation-induced brain injury. CONCLUSIONS The intricate microenvironment and molecular mechanisms associated with radiation-induced brain injury underscore the crucial roles of immune cells in its onset and progression. By investigating the interplay among microglia, neurons, astrocytes, and peripheral immune cells, potential strategies emerge to mitigate microglial activation, reduce the release of inflammatory agents, and impede the entry of peripheral immune cells into the brain.
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Affiliation(s)
- Yafeng Wang
- Henan Neurodevelopment Engineering Research Center for Children, Children's Hospital Affiliated to Zhengzhou University, Department of PediatricsHenan Children's Hospital Zhengzhou Children's HospitalZhengzhouChina
- Department of Hematology and Oncology, Children's Hospital Affiliated to Zhengzhou UniversityHenan Children's Hospital Zhengzhou Children's HospitalZhengzhouChina
| | - Jiayu Tian
- Henan Neurodevelopment Engineering Research Center for Children, Children's Hospital Affiliated to Zhengzhou University, Department of PediatricsHenan Children's Hospital Zhengzhou Children's HospitalZhengzhouChina
| | - Dandan Liu
- Department of Electrocardiogram, Children's Hospital Affiliated to Zhengzhou UniversityHenan Children's Hospital Zhengzhou Children's HospitalZhengzhouChina
| | - Tao Li
- Henan Neurodevelopment Engineering Research Center for Children, Children's Hospital Affiliated to Zhengzhou University, Department of PediatricsHenan Children's Hospital Zhengzhou Children's HospitalZhengzhouChina
| | - Yanna Mao
- Department of Hematology and Oncology, Children's Hospital Affiliated to Zhengzhou UniversityHenan Children's Hospital Zhengzhou Children's HospitalZhengzhouChina
| | - Changlian Zhu
- Henan Key Laboratory of Child Brain Injury and Henan Pediatric Clinical Research Center, Department of PediatricsInstitute of Neuroscience and Third Affiliated Hospital of Zhengzhou UniversityKangfuqian Street 7Zhengzhou450052None SelectedChina
- Center for Brain Repair and Rehabilitation, Department of Clinical NeuroscienceInstitute of Neuroscience and Physiology, Sahlgrenska Academy, University of GothenburgMedicinaregtan 11Göteborg40530Sweden
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Deng Y, Ding W, Peng Q, Wang W, Duan R, Zhang Y. Advancement in Beneficial Effects of AVE 0991: A Brief Review. Mini Rev Med Chem 2024; 24:139-158. [PMID: 36998128 DOI: 10.2174/1389557523666230328134932] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 01/08/2023] [Accepted: 01/11/2023] [Indexed: 04/01/2023]
Abstract
AVE 0991, a non-peptide analogue of Angiotensin-(1-7) [Ang-(1-7)], is orally active and physiologically well tolerated. Several studies have demonstrated that AVE 0991 improves glucose and lipid metabolism, and contains anti-inflammatory, anti-apoptotic, anti-fibrosis, and anti-oxidant effects. Numerous preclinical studies have also reported that AVE 0991 appears to have beneficial effects on a variety of systemic diseases, including cardiovascular, liver, kidney, cancer, diabetes, and nervous system diseases. This study searched multiple literature databases, including PubMed, Web of Science, EMBASE, Google Scholar, Cochrane Library, and the ClinicalTrials.gov website from the establishment to October 2022, using AVE 0991 as a keyword. This literature search revealed that AVE 0991 could play different roles via various signaling pathways. However, the potential mechanisms of these effects need further elucidation. This review summarizes the benefits of AVE 0991 in several medical problems, including the COVID-19 pandemic. The paper also describes the underlying mechanisms of AVE 0991, giving in-depth insights and perspectives on the pharmaceutical value of AVE 0991 in drug discovery and development.
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Affiliation(s)
- Yang Deng
- School of Basic Medicine & Clinical Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Wangli Ding
- School of Basic Medicine & Clinical Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Qiang Peng
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, China
| | - Wei Wang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, China
| | - Rui Duan
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, China
| | - Yingdong Zhang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, China
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3
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Villapol S, Janatpour ZC, Affram KO, Symes AJ. The Renin Angiotensin System as a Therapeutic Target in Traumatic Brain Injury. Neurotherapeutics 2023; 20:1565-1591. [PMID: 37759139 PMCID: PMC10684482 DOI: 10.1007/s13311-023-01435-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2023] [Indexed: 09/29/2023] Open
Abstract
Traumatic brain injury (TBI) is a major public health problem, with limited pharmacological options available beyond symptomatic relief. The renin angiotensin system (RAS) is primarily known as a systemic endocrine regulatory system, with major roles controlling blood pressure and fluid homeostasis. Drugs that target the RAS are used to treat hypertension, heart failure and kidney disorders. They have now been used chronically by millions of people and have a favorable safety profile. In addition to the systemic RAS, it is now appreciated that many different organ systems, including the brain, have their own local RAS. The major ligand of the classic RAS, Angiotensin II (Ang II) acts predominantly through the Ang II Type 1 receptor (AT1R), leading to vasoconstriction, inflammation, and heightened oxidative stress. These processes can exacerbate brain injuries. Ang II receptor blockers (ARBs) are AT1R antagonists. They have been shown in several preclinical studies to enhance recovery from TBI in rodents through improvements in molecular, cellular and behavioral correlates of injury. ARBs are now under consideration for clinical trials in TBI. Several different RAS peptides that signal through receptors distinct from the AT1R, are also potential therapeutic targets for TBI. The counter regulatory RAS pathway has actions that oppose those stimulated by AT1R signaling. This alternative pathway has many beneficial effects on cells in the central nervous system, bringing about vasodilation, and having anti-inflammatory and anti-oxidative stress actions. Stimulation of this pathway also has potential therapeutic value for the treatment of TBI. This comprehensive review will provide an overview of the various components of the RAS, with a focus on their direct relevance to TBI pathology. It will explore different therapeutic agents that modulate this system and assess their potential efficacy in treating TBI patients.
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Affiliation(s)
- Sonia Villapol
- Department of Neurosurgery, Houston Methodist Hospital, Houston, TX, USA
| | - Zachary C Janatpour
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD, 20814, USA
| | - Kwame O Affram
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD, 20814, USA
| | - Aviva J Symes
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University, 4301 Jones Bridge Road, Bethesda, MD, 20814, USA.
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4
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Berg TJ, Pietras A. Radiotherapy-induced remodeling of the tumor microenvironment by stromal cells. Semin Cancer Biol 2022; 86:846-856. [PMID: 35143991 DOI: 10.1016/j.semcancer.2022.02.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 02/03/2022] [Accepted: 02/06/2022] [Indexed: 02/08/2023]
Abstract
Cancer cells reside amongst a complex milieu of stromal cells and structural features known as the tumor microenvironment. Often cancer cells divert and co-opt functions of stromal cells of the microenvironment to support tumor progression and treatment resistance. During therapy targeting cancer cells, the stromal cells of the microenvironment receive therapy to the same extent as cancer cells. Stromal cells therefore activate a variety of responses to the damage induced by these therapies, and some of those responses may support tumor progression and resistance. We review here the response of stromal cells to cancer therapy with a focus on radiotherapy in glioblastoma. We highlight the response of endothelial cells and the vasculature, macrophages and microglia, and astrocytes, as well as describing resulting changes in the extracellular matrix. We emphasize the complex interplay of these cellular factors in their dynamic responses. Finally, we discuss their resulting support of cancer cells in tumor progression and therapy resistance. Understanding the stromal cell response to therapy provides insight into complementary therapeutic targets to enhance tumor response to existing treatment options.
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Affiliation(s)
- Tracy J Berg
- Division of Translational Cancer Research, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Alexander Pietras
- Division of Translational Cancer Research, Department of Laboratory Medicine, Lund University, Lund, Sweden.
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5
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Annoni F, Moro F, Caruso E, Zoerle T, Taccone FS, Zanier ER. Angiotensin-(1-7) as a Potential Therapeutic Strategy for Delayed Cerebral Ischemia in Subarachnoid Hemorrhage. Front Immunol 2022; 13:841692. [PMID: 35355989 PMCID: PMC8959484 DOI: 10.3389/fimmu.2022.841692] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/04/2022] [Indexed: 01/06/2023] Open
Abstract
Aneurysmal subarachnoid hemorrhage (SAH) is a substantial cause of mortality and morbidity worldwide. Moreover, survivors after the initial bleeding are often subject to secondary brain injuries and delayed cerebral ischemia, further increasing the risk of a poor outcome. In recent years, the renin-angiotensin system (RAS) has been proposed as a target pathway for therapeutic interventions after brain injury. The RAS is a complex system of biochemical reactions critical for several systemic functions, namely, inflammation, vascular tone, endothelial activation, water balance, fibrosis, and apoptosis. The RAS system is classically divided into a pro-inflammatory axis, mediated by angiotensin (Ang)-II and its specific receptor AT1R, and a counterbalancing system, presented in humans as Ang-(1-7) and its receptor, MasR. Experimental data suggest that upregulation of the Ang-(1-7)/MasR axis might be neuroprotective in numerous pathological conditions, namely, ischemic stroke, cognitive disorders, Parkinson's disease, and depression. In the presence of SAH, Ang-(1-7)/MasR neuroprotective and modulating properties could help reduce brain damage by acting on neuroinflammation, and through direct vascular and anti-thrombotic effects. Here we review the role of RAS in brain ischemia, with specific focus on SAH and the therapeutic potential of Ang-(1-7).
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Affiliation(s)
- Filippo Annoni
- Laboratory of Acute Brain Injury and Therapeutic Strategies, Department of Neuroscience, Mario Negri Institute for Pharmacological Research IRCCS, Milan, Italy.,Department of Intensive Care, Erasme Hospital, Free University of Brussels, Anderlecht, Belgium
| | - Federico Moro
- Laboratory of Acute Brain Injury and Therapeutic Strategies, Department of Neuroscience, Mario Negri Institute for Pharmacological Research IRCCS, Milan, Italy
| | - Enrico Caruso
- Laboratory of Acute Brain Injury and Therapeutic Strategies, Department of Neuroscience, Mario Negri Institute for Pharmacological Research IRCCS, Milan, Italy.,Neuroscience Intensive Care Unit, Department of Anesthesia and Critical Care, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Tommaso Zoerle
- Neuroscience Intensive Care Unit, Department of Anesthesia and Critical Care, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Fabio Silvio Taccone
- Department of Intensive Care, Erasme Hospital, Free University of Brussels, Anderlecht, Belgium
| | - Elisa R Zanier
- Laboratory of Acute Brain Injury and Therapeutic Strategies, Department of Neuroscience, Mario Negri Institute for Pharmacological Research IRCCS, Milan, Italy
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Luo N, Zhu W, Li X, Fu M, Peng X, Yang F, Zhang Y, Yin H, Yang C, Zhao J, Yuan X, Hu G. Impact of Gut Microbiota on Radiation-Associated Cognitive Dysfunction and Neuroinflammation in Mice. Radiat Res 2022; 197:350-364. [PMID: 34982167 DOI: 10.1667/rade-21-00006.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 11/17/2021] [Indexed: 11/03/2022]
Abstract
Radiation-induced brain injury is a common complication of brain irradiation that eventually leads to irreversible cognitive impairment. Evidence has shown that the gut microbiome may play an important role in radiation-induced cognitive function. However, the effects of gut microbiota on radiation-induced brain injury (RIBI) remain poorly understood. Here we studied the link between intestinal microbes and radiation-induced brain injury to further investigate the effects of intestinal bacteria on neuroinflammation and cognitive function. We first verified the differences in gut microbes between male and female mice and administered antibiotics to C57BL/6 male mice to deplete the gut flora and then expose mice to radiation. We found that depletion of intestinal flora after irradiation may act as a protective modulator against radiation-induced brain injury. Moreover, we found that pretreatment with depleted gut microbes in RIBI mice suppressed brain pro-inflammatory factor production, and high-throughput sequencing analysis of mouse feces at 1-month postirradiation revealed microbial differences. Interestingly, a proportion of Verrucomicrobia Akkermansia showed partial recovery. Additionally, short-chain fatty acid treatments increased neuroinflammation in the radiation-induced brain injury model. Although a further increase in cognitive function was not observed, brain injury was aggravated in whole-brain irradiated mice to some extent. The protective effects of depleted intestinal flora and the utilization of the brain-gut axis open new avenues for development of innovative therapeutic strategies for radiation-induced brain injury.
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Affiliation(s)
- Na Luo
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Wenjun Zhu
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xiaoyu Li
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Min Fu
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xiaohong Peng
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Feng Yang
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yuanyuan Zhang
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Han Yin
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Chunlei Yang
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Jing Zhao
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xianglin Yuan
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Guangyuan Hu
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
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7
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Duan R, Wang SY, Wei B, Deng Y, Fu XX, Gong PY, E Y, Sun XJ, Cao HM, Shi JQ, Jiang T, Zhang YD. Angiotensin-(1-7) Analogue AVE0991 Modulates Astrocyte-Mediated Neuroinflammation via lncRNA SNHG14/miR-223-3p/NLRP3 Pathway and Offers Neuroprotection in a Transgenic Mouse Model of Alzheimer's Disease. J Inflamm Res 2021; 14:7007-7019. [PMID: 34955647 PMCID: PMC8694579 DOI: 10.2147/jir.s343575] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 12/08/2021] [Indexed: 12/16/2022] Open
Abstract
Objective Emerging evidence suggests that brain angiotensin-(1–7) (Ang-(1–7)) deficiency contributes to the pathogenesis of Alzheimer’s disease (AD). Meanwhile, our previous studies revealed that restoration of brain Ang-(1–7) levels provided neuroprotection by inhibition of inflammatory responses during AD progress. However, the potential molecular mechanisms by which Ang-(1–7) modulates neuroinflammation remain unclear. Materials and Methods APP/PS1 mice were injected intraperitoneally with AVE0991 (a nonpeptide analogue of Ang-(1–7)) once a day for 30 consecutive days. Cognitive functions, neuronal and synaptic integrity, and inflammation-related markers were assessed. Since astrocytes played a crucial role in AD-related neuroinflammation whilst long noncoding RNAs (lncRNAs) were reported to participate in modulating inflammatory responses, astrocytes of APP/PS1 mice were isolated for high-throughput lncRNA sequencing to identify the most differentially expressed lncRNA following AVE0991 treatment. Afterward, the downstream pathways of this lncRNA in the anti-inflammatory action of AVE0991 were investigated using primary astrocytes. Results AVE0991 rescued spatial cognitive impairments and alleviated neuronal and synaptic damage in APP/PS1 mice. The levels of Aβ1-42 in the brain of APP/PS1 mice were not affected by AVE0991. By employing high-throughput lncRNA sequencing, our in vitro study demonstrated for the first time that AVE0991 suppressed astrocytic NLRP3 inflammasome-mediated neuroinflammation via a lncRNA SNHG14-dependent manner. SNHG14 acted as a sponge of miR-223-3p while NLRP3 represented a direct target of miR-223-3p in astrocytes. In addition, miR-223-3p participated in the AVE0991-induced suppression of astrocytic NLRP3 inflammasome. Conclusion Our results suggest that Ang-(1–7) analogue AVE0991 inhibits astrocyte-mediated neuroinflammation via SNHG14/miR-223-3p/NLRP3 pathway and offers neuroprotection in APP/PS1 mice. These findings reveal the underlying mechanisms by which Ang-(1–7) inhibits neuroinflammation under AD condition and uncover the potential of its nonpeptide analogue AVE0991 in AD treatment.
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Affiliation(s)
- Rui Duan
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, People's Republic of China
| | - Si-Yu Wang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, People's Republic of China
| | - Bin Wei
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, People's Republic of China
| | - Yang Deng
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Xin-Xin Fu
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Peng-Yu Gong
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, People's Republic of China
| | - Yan E
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, People's Republic of China
| | - Xiao-Jin Sun
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
| | - Hai-Ming Cao
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, People's Republic of China
| | - Jian-Quan Shi
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, People's Republic of China
| | - Teng Jiang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, People's Republic of China
| | - Ying-Dong Zhang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, People's Republic of China.,School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 211198, People's Republic of China
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Lin SY, Sung FC, Lin CL, Lin CC, Hsu WH, Liao WC, Ho MW, Lin PC, Hsu CY, Kao CH. Association of antihypertensives during hospitalisation with acute respiratory failure in patients with viral pneumonia: A population-based case-control study. Int J Clin Pract 2021; 75:e14776. [PMID: 34510649 DOI: 10.1111/ijcp.14776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 07/03/2021] [Accepted: 08/30/2021] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND We aimed to identify associations between the risk of acute respiratory failure (ARF) and types of antihypertensive agents in patients with viral pneumonia. METHODS In this case-control study, data extracted from the Taiwan National Health Insurance Research Database were analysed. The base population comprised patients with viral pneumonia treated from 2000 to 2013. The case group comprised patients with ARF and the control group comprised participants without ARF. Adjusted odds ratios (ORs) were calculated using a multivariable logistic regression model. RESULTS In total, 4427 viral pneumonia patients with ARF and 4427 matched control participants without ARF were recruited. Patients with diabetes, alcohol-related disease, asthma, chronic kidney disease or end-stage renal disease, chronic obstructive pulmonary disease, cancer, congestive heart failure, stroke, acute pulmonary oedema and shock had increased odds of developing ARF, especially shock (adjusted OR = 49.3; 95% CI = 27.4, 88.7), cancer (12.6; 8.67, 18.2) and stroke (7.51; 5.32, 10.6). Increasing odds of developing ARF were noted in patients using potassium-sparing diuretics (2.95; 1.54, 5.64), loop diuretics (68.2; 48.1, 96.6), calcium channel blockers (1.64; 1.26, 2.13) and angiotensin-converting enzyme inhibitors (1.70; 1.15, 2.53). Patients with prescriptions of α-blockers (0.44; 0.26, 0.74), β-blockers (0.37; 0.26, 0.52), thiazides (0.38; 0.25, 0.59) and angiotensin receptor blockers (0.65; 0.51, 0.83) had lower odds of having ARF. CONCLUSION Patients with viral pneumonia who received α-blockers, β-blockers, thiazides or angiotensin receptor blockers during hospitalisation had a lower risk of developing ARF.
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Affiliation(s)
- Shih-Yi Lin
- Graduate Institute of Biomedical Sciences, College of Medicine, China Medical University, Taichung, Taiwan
- Division of Nephrology and Kidney Institute, China Medical University Hospital, Taichung, Taiwan
| | - Fung-Chang Sung
- Graduate Institute of Biomedical Sciences, College of Medicine, China Medical University, Taichung, Taiwan
- Management Office for Health Data, China Medical University Hospital, Taichung, Taiwan
- College of Medicine, China Medical University, Taichung, Taiwan
| | - Cheng-Li Lin
- Management Office for Health Data, China Medical University Hospital, Taichung, Taiwan
- College of Medicine, China Medical University, Taichung, Taiwan
| | - Cheng-Chieh Lin
- Graduate Institute of Biomedical Sciences, College of Medicine, China Medical University, Taichung, Taiwan
- Department of Family Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Wu-Huei Hsu
- Graduate Institute of Biomedical Sciences, College of Medicine, China Medical University, Taichung, Taiwan
- Department of Chest Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Wei-Chih Liao
- Graduate Institute of Biomedical Sciences, College of Medicine, China Medical University, Taichung, Taiwan
- Department of Chest Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Mao-Wang Ho
- Graduate Institute of Biomedical Sciences, College of Medicine, China Medical University, Taichung, Taiwan
- Department of Infection, China Medical University Hospital, Taichung, Taiwan
| | - Po-Chang Lin
- Graduate Institute of Biomedical Sciences, College of Medicine, China Medical University, Taichung, Taiwan
- Department of Infection, China Medical University Hospital, Taichung, Taiwan
| | - Chung-Y Hsu
- Graduate Institute of Biomedical Sciences, College of Medicine, China Medical University, Taichung, Taiwan
| | - Chia-Hung Kao
- Graduate Institute of Biomedical Sciences, College of Medicine, China Medical University, Taichung, Taiwan
- Department of Nuclear Medicine and PET Center, China Medical University Hospital, Taichung, Taiwan
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung, Taiwan
- Center of Augmented Intelligence in Healthcare, China Medical University Hospital, Taichung, Taiwan
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9
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Barzegar M, Stokes KY, Chernyshev O, Kelley RE, Alexander JS. The Role of the ACE2/MasR Axis in Ischemic Stroke: New Insights for Therapy. Biomedicines 2021; 9:1667. [PMID: 34829896 PMCID: PMC8615891 DOI: 10.3390/biomedicines9111667] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 11/02/2021] [Accepted: 11/08/2021] [Indexed: 12/15/2022] Open
Abstract
Ischemic stroke remains the leading cause of neurologically based morbidity and mortality. Current stroke treatment is limited to two classes of FDA-approved drugs: thrombolytic agents (tissue plasminogen activator (tPA)) and antithrombotic agents (aspirin and heparin), which have a narrow time-window (<4.5 h) for administration after onset of stroke symptoms. While thrombolytic agents restore perfusion, they carry serious risks for hemorrhage, and do not influence damage responses during reperfusion. Consequently, stroke therapies that can suppress deleterious effects of ischemic injury are desperately needed. Angiotensin converting enzyme-2 (ACE2) has been recently suggested to beneficially influence experimental stroke outcomes by converting the vasoconstrictor Ang II into the vasodilator Ang 1-7. In this review, we extensively discuss the protective functions of ACE2-Ang (1-7)-MasR axis of renin angiotensin system (RAS) in ischemic stroke.
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Affiliation(s)
- Mansoureh Barzegar
- Molecular and Cellular Physiology, Ochsner-LSU Health Sciences Center, Shreveport, LA 71130-3932, USA; (M.B.); (K.Y.S.)
| | - Karen Y. Stokes
- Molecular and Cellular Physiology, Ochsner-LSU Health Sciences Center, Shreveport, LA 71130-3932, USA; (M.B.); (K.Y.S.)
| | - Oleg Chernyshev
- Neurology, Ochsner-LSU Health Sciences Center, Shreveport, LA 71130-3932, USA; (O.C.); (R.E.K.)
| | - Roger E. Kelley
- Neurology, Ochsner-LSU Health Sciences Center, Shreveport, LA 71130-3932, USA; (O.C.); (R.E.K.)
| | - Jonathan S. Alexander
- Molecular and Cellular Physiology, Ochsner-LSU Health Sciences Center, Shreveport, LA 71130-3932, USA; (M.B.); (K.Y.S.)
- Neurology, Ochsner-LSU Health Sciences Center, Shreveport, LA 71130-3932, USA; (O.C.); (R.E.K.)
- Medicine, LSU Health Center, 1501 Kings Highway, Shreveport, LA 71130-3932, USA
- Oral and Maxillofacial Surgery, Ochsner-LSU Health Sciences Center, Shreveport, LA 71130-3932, USA
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10
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Xue X, Duan R, Zhang QQ, Wang SY, Gong PY, Yan E, Zhang YD, Jiang T. A non-peptidic MAS1 agonist AVE0991 alleviates hippocampal synaptic degeneration in rats with chronic cerebral hypoperfusion. Curr Neurovasc Res 2021; 18:343-350. [PMID: 34636310 DOI: 10.2174/1567202618666211012095210] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/10/2021] [Accepted: 07/14/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Chronic cerebral hypoperfusion (CCH) is a contributing factor for neurodegenerative diseases. As a recently identified heptapeptide of the brain renin-angiotensin system, angiotensin-(1-7) was revealed to activate its receptor MAS1 and thus ameliorated cognitive impairments in rats with CCH. Since hippocampal synaptic degeneration represents an important pathological basis of cognitive deficits, we hypothesize that activation of MAS1-mediated signaling may alleviate CCH-induced synaptic degeneration in the hippocampus. METHODS In this study, we tested this hypothesis and uncovered the underlying mechanisms in a rat model of CCH induced by bilateral common carotid artery ligation surgery. At 1 week after the surgery, rats received a daily intraperitoneal injection of vehicle or a non-peptidic MAS1 agonist AVE0991 for 8 weeks. During this procedure, cerebral blood flow (CBF) was recorded. The levels of MAS1, amyloid-β (Aβ), neuroinflammatory cytokines, glial cell markers and synaptophysin in the hippocampus were assessed at the end of the treatment period. RESULTS We showed that AVE0991 significantly alleviated hippocampal synaptic degeneration in rats with CCH. This protection might be achieved by facilitating CBF recovery, reducing hippocampal Aβ levels and suppressing neuroinflammatory responses. CONCLUSIONS These findings indicate that MAS1-mediated signaling may represent a novel therapeutic target for CCH-related neurodegenerative diseases.
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Affiliation(s)
- Xiao Xue
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006. China
| | - Rui Duan
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006. China
| | - Qiao-Quan Zhang
- Department of Pathology, Nanjing Brain Hospital, Nanjing Medical University, Nanjing, 210029. China
| | - Si-Yu Wang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006. China
| | - Peng-Yu Gong
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006. China
| | - Yan E
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006. China
| | - Ying-Dong Zhang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006. China
| | - Teng Jiang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006. China
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11
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Xu H, An X, Tian J, Fu M, Wang Q, Li C, He X, Niu L. Angiotensin-(1-7) protects against sepsis-associated left ventricular dysfunction induced by lipopolysaccharide. Peptides 2021; 144:170612. [PMID: 34298021 DOI: 10.1016/j.peptides.2021.170612] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 07/11/2021] [Accepted: 07/16/2021] [Indexed: 12/12/2022]
Abstract
Sepsis-induced myocardial dysfunction is a major cause of death. The present study explored whether angiotensin (Ang)-(1-7), an important biologically active peptide of the renin-angiotensin system, could improve cardiac dysfunction and attenuate inflammation and apoptosis. Experiments were carried out in mice and in neonatal rat cardiomyocytes (NRCMs) treated with lipopolysaccharide (LPS) or Ang-(1-7). Angiotensin converting enzyme 2 (ACE2), Ang-(1-7) and Mas receptor (MasR) expressions were reduced in the mouse left ventricular and NRCM treated with LPS. Ang-(1-7) increased the ejection fraction and fractional shortening of left ventricular, which were reduced upon LPS injection in mice. Ang-(1-7) pre-treatment reversed LPS-induced decreases of α-myosin heavy chain (MHC) and β-MHC, and increases of S100 calcium binding protein A8 (S100A8) and S100A9 in the mouse left ventricular. The LPS-induced increases of tumor necrosis factor (TNF)-α and interleukin (IL)-1β in the mouse left ventricular and NRCMs were inhibited by Ang-(1-7) administration. Ang-(1-7) treatment reversed the increases of cleaved-caspase 3, cleaved-caspase 8 and Bax, and the decrease of Bcl2 induced by LPS in the mouse left ventricular and NRCMs. The increases of MAPKs pathway induced by LPS in NRCMs were inhibited by Ang-(1-7). These results indicate that Ang-(1-7) protects against sepsis-associated left ventricular dysfunction induced by LPS, and increases cardiac contractility via attenuating inflammation and apoptosis.
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Affiliation(s)
- Hui Xu
- Department of Cardiology, Xuzhou Children's Hospital of Xuzhou Medical University, Xuzhou, China
| | - Xinjiang An
- Department of Cardiology, Xuzhou Children's Hospital of Xuzhou Medical University, Xuzhou, China
| | - Jing Tian
- Department of Cardiology, Xuzhou Children's Hospital of Xuzhou Medical University, Xuzhou, China
| | - Mingyu Fu
- Department of Cardiology, Xuzhou Children's Hospital of Xuzhou Medical University, Xuzhou, China
| | - Qingwen Wang
- Department of Cardiology, Xuzhou Children's Hospital of Xuzhou Medical University, Xuzhou, China
| | - Chunli Li
- Department of Cardiology, Xuzhou Children's Hospital of Xuzhou Medical University, Xuzhou, China
| | - Xiuhua He
- Department of Cardiology, Xuzhou Children's Hospital of Xuzhou Medical University, Xuzhou, China
| | - Ling Niu
- Department of Cardiology, Xuzhou Children's Hospital of Xuzhou Medical University, Xuzhou, China.
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12
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Moreira FRC, de Oliveira TA, Ramos NE, Abreu MAD, Simões E Silva AC. The role of renin angiotensin system in the pathophysiology of rheumatoid arthritis. Mol Biol Rep 2021; 48:6619-6629. [PMID: 34417705 DOI: 10.1007/s11033-021-06672-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 08/18/2021] [Indexed: 12/30/2022]
Abstract
BACKGROUND In rheumatoid arthritis (RA) and osteoarthritis (OA), chronic inflammatory processes lead to progresive joint destruction. The renin-angiotensin system (RAS) is involved in the pathogenesis of RA and OA. The aim of this mini-review article is to summarize evidence on the role of RAS in RA and OA. METHODS A non-systematic search in Pubmed included terms as "rheumatoid arthritis", "renin angiotensin system", "osteopenia", "RANKL", "DKK-1", "MMP", "inflammation", "angiogenesis", "local renin-angiotensin system", "angiotensin converting enzyme", "AT2 receptor", "Ang-(1-7)", "VEGF", "angiotensine receptor blocker", "angiotensin converting enzyme inhibitors", "renin inhibitors". RESULTS Both RAS axes, the classical one, formed by angiotensin converting enzyme (ACE), angiotensin (Ang) II and AT1 receptor (AT1R) and the counter-regulatory one, composed by ACE2, Ang-(1-7) and the Mas receptor, modulate inflammation and tissue damage. Ang II activates pro-inflammatory mediators and oxidative stress. Conversely, Ang-(1-7) exerts anti-inflammatory actions, decreasing cytokine release, leukocyte attraction, density of vessels, tissue damage and fibrosis. Angiogenesis facilitates inflammatory cells invasion, while osteopenia causes joint dysfunction. Up-regulated osteoclastogenisis and down-regulated osteoblastogeneses were associaed with the activation of the classical RAS axis. Three different pathways, RANKL, DKK-1 and MMPs are enhanced by classical RAS activation. The treatment of RA included methotrexate and corticosteroids, which can cause side effects. Studies with angiotensin receptor blockers (ARBs), angiotensin converting enzyme inhibitors (ACEi) and renin inhibitors have been conducted in experimental and clinical RA with promising results. CONCLUSION The classical RAS activation is an important mechanism in RA pathogenesis and the benefit of ARB and ACEi administration should be further investigated.
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Affiliation(s)
- Fernanda Rocha Chaves Moreira
- Interdisciplinary Laboratory of Medical Investigation, Faculty of Medicine, Federal University of Minas Gerais (UFMG), Avenida Alfredo Balena, 190, 2nd floor, room #281, Belo Horizonte, MG, 30130-100, Brazil
| | - Tiago Almeida de Oliveira
- Interdisciplinary Laboratory of Medical Investigation, Faculty of Medicine, Federal University of Minas Gerais (UFMG), Avenida Alfredo Balena, 190, 2nd floor, room #281, Belo Horizonte, MG, 30130-100, Brazil
| | - Nádia Eliza Ramos
- Interdisciplinary Laboratory of Medical Investigation, Faculty of Medicine, Federal University of Minas Gerais (UFMG), Avenida Alfredo Balena, 190, 2nd floor, room #281, Belo Horizonte, MG, 30130-100, Brazil
| | - Maria Augusta Duarte Abreu
- Interdisciplinary Laboratory of Medical Investigation, Faculty of Medicine, Federal University of Minas Gerais (UFMG), Avenida Alfredo Balena, 190, 2nd floor, room #281, Belo Horizonte, MG, 30130-100, Brazil
| | - Ana Cristina Simões E Silva
- Interdisciplinary Laboratory of Medical Investigation, Faculty of Medicine, Federal University of Minas Gerais (UFMG), Avenida Alfredo Balena, 190, 2nd floor, room #281, Belo Horizonte, MG, 30130-100, Brazil.
- Department of Pediatrics, Faculty of Medicine, UFMG, Belo Horizonte, Brazil.
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13
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Faria BCD, Sacramento LGG, Filipin CSA, da Cruz AF, Nagata SN, Silva ACSE. An analysis of chronic kidney disease as a prognostic factor in pediatric cases of COVID-19. J Bras Nefrol 2021; 43:400-409. [PMID: 33704348 PMCID: PMC8428649 DOI: 10.1590/2175-8239-jbn-2020-0208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 12/17/2020] [Indexed: 11/24/2022] Open
Abstract
Advanced age is a risk factor for severe infection by acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Children, however, often present with milder manifestations of Coronavirus Disease 2019 (COVID-19). Associations have been found between COVID-19 and multisystem inflammatory syndrome in children (MIS-C). Patients with the latter condition present more severe involvement. Adults with comorbidities such as chronic kidney disease (CKD) are more severely affected. This narrative review aimed to look into whether CKD contributed to more severe involvement in pediatric patients with COVID-19. The studies included in this review did not report severe cases or deaths, and indicated that pediatric patients with CKD and previously healthy children recovered quickly from infection. However, some patients with MIS-C required hospitalization in intensive care units and a few died, although it was not possible to correlate MIS-C and CKD. Conversely, adults with CKD reportedly had increased risk of severe infection by SARS-CoV-2 and higher death rates. The discrepancies seen between age groups may be due to immune system and renin-angiotensin system differences, with more pronounced expression of ACE2 in children. Immunosuppressant therapy has not been related with positive or negative effects in individuals with COVID-19, although current recommendations establish decreases in the dosage of some medications. To sum up with, CKD was not associated with more severe involvement in children diagnosed with COVID-19. Studies enrolling larger populations are still required.
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Affiliation(s)
| | | | | | - Aniel Feitosa da Cruz
- Universidade Federal de Minas Gerais, Faculdade de Medicina, Belo
Horizonte, MG, Brasil
| | - Sarah Naomi Nagata
- Universidade Federal de Minas Gerais, Faculdade de Medicina, Belo
Horizonte, MG, Brasil
| | - Ana Cristina Simões e Silva
- Universidade Federal de Minas Gerais, Faculdade de Medicina,
Departamento de Pediatria, Belo Horizonte, MG, Brasil
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14
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Rukavina Mikusic NL, Pineda AM, Gironacci MM. Angiotensin-(1-7) and Mas receptor in the brain. EXPLORATION OF MEDICINE 2021. [DOI: 10.37349/emed.2021.00046] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The renin-angiotensin system (RAS) is a key regulator of blood pressure and electrolyte homeostasis. Besides its importance as regulator of the cardiovascular function, the RAS has also been associated to the modulation of higher brain functions, including cognition, memory, depression and anxiety. For many years, angiotensin II (Ang II) has been considered the major bioactive component of the RAS. However, the existence of many other biologically active RAS components has currently been recognized, with similar, opposite, or distinct effects to those exerted by Ang II. Today, it is considered that the RAS is primarily constituted by two opposite arms. The pressor arm is composed by Ang II and the Ang II type 1 (AT1) receptor (AT1R), which mediates the vasoconstrictor, proliferative, hypertensive, oxidative and pro-inflammatory effects of the RAS. The depressor arm is mainly composed by Ang-(1-7), its Mas receptor (MasR) which mediates the depressor, vasodilatory, antiproliferative, antioxidant and anti-inflammatory effects of Ang-(1-7) and the AT2 receptor (AT2R), which opposes to the effects mediated by AT1R activation. Central Ang-(1-7) is implicated in the control of the cardiovascular function, thus participating in the regulation of blood pressure. Ang-(1-7) also exerts neuroprotective actions through MasR activation by opposing to the harmful effects of the Ang II/AT1R axis. This review is focused on the expression and regulation of the Ang-(1-7)/MasR axis in the brain, its main neuroprotective effects and the evidence regarding its involvement in the pathophysiology of several diseases at cardiovascular and neurological level.
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Affiliation(s)
- Natalia L. Rukavina Mikusic
- Dpto. Química Biológica, IQUIFIB (UBA-CONICET), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, 1113 Buenos Aires, Argentina
| | - Angélica M. Pineda
- Dpto. Química Biológica, IQUIFIB (UBA-CONICET), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, 1113 Buenos Aires, Argentina
| | - Mariela M. Gironacci
- Dpto. Química Biológica, IQUIFIB (UBA-CONICET), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, 1113 Buenos Aires, Argentina
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15
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Yang J, Yang X, Gao L, Zhang J, Yi C, Huang Y. The role of the renin-angiotensin system inhibitors in malignancy: a review. Am J Cancer Res 2021; 11:884-897. [PMID: 33791161 PMCID: PMC7994166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 01/12/2021] [Indexed: 06/12/2023] Open
Abstract
Hypertension is one of the most prevalent diseases in cardiology. The angiotensin receptor blockers (ARBs)/angiotensin converting enzyme inhibitors (ACEIs) are widely used drugs to stabilize the blood pressure via inhibition of the renin-angiotensin system (RAS). Studies have found that the exposure to RAS inhibitors (RASi) can suppress the development of cancers via multimodal mechanisms and has attracted increased attentions in the recent past. Owing the potential of RASi to inhibit tumor growth, proliferation and metastasis, they are considered as the potential and exciting candidates to enhance the effect of chemo-radiotherapy and targeted therapy efficacy. However, there are conflicting reports as to the use of ARB/ACEI in all facets of tumor growth. In this study, we comprehensively summarize and review the potential mechanisms of RASi in cancer treatment, like inhibition of tumor angiogenesis, reduction of cancer-associated fibroblasts (CAFs) and extracellular matrix (ECM), regulation of immune cells and improvement of hypoxia. Additionally, based on the basic and clinical experiments, we analyze the views and results regarding the role of RASi plays in tumor from genesis to recurrence, and certainly cancer treatment (chemo-radiotherapy and targeted therapy). In the last, not only do we discuss the prospects of using RASi to enhance cancer treatment efficacy but also point out the conflicting situation with the intention to give some directions and inspiration on this topic.
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Affiliation(s)
- Ju Yang
- West China School of Basic Medical Science and Forensic Medicine, Sichuan UniversityChengdu 610041, China
| | - Xi Yang
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan UniversityChengdu 610041, China
| | - Ling Gao
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan UniversityChengdu 610041, China
| | - Jie Zhang
- Lab of Experimental Oncology, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation CenterChengdu 610041, China
| | - Cheng Yi
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan UniversityChengdu 610041, China
| | - Ying Huang
- West China School of Basic Medical Science and Forensic Medicine, Sichuan UniversityChengdu 610041, China
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16
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Hutson KH, Willis K, Nwokwu CD, Maynard M, Nestorova GG. Photon versus proton neurotoxicity: Impact on mitochondrial function and 8-OHdG base-excision repair mechanism in human astrocytes. Neurotoxicology 2020; 82:158-166. [PMID: 33347902 DOI: 10.1016/j.neuro.2020.12.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 11/24/2020] [Accepted: 12/16/2020] [Indexed: 10/22/2022]
Abstract
This study assesses and compares the neurotoxic effects of proton and photon radiation on mitochondrial function and DNA repair capabilities of human astrocytes. Human astrocytes received either proton (0.5 Gy and 3 Gy), photon (0.5 Gy and 3 Gy), or sham-radiation treatment. The mRNA expression level of the DNA repair protein OGG1 was determined via RT-qPCR. The levels of 8-OHdG in the cell media were measured via ELISA. Real-time kinetic analysis of extracellular oxygen consumption rates was performed to assess mitochondrial function. Radiation-induced changes in mitochondrial mass and oxidative activity were assessed using fluorescent imaging with MitoTracker™ Green FM and MitoTracker™ Orange CM-H2TMRos dyes respectively. PCR was used to quantify the alteration in the mitochondrial DNA content, measured as the mitochondrial to nuclear DNA ratio. A significant increase in mitochondrial mass and levels of reactive oxygen species was observed after radiation treatment. Additionally, real-time PCR analysis indicated a significant depletion of mitochondrial DNA content in the irradiated cells when compared to the control. This was accompanied by a decreased gene expression of the DNA base-excision repair protein OGG1 and reduced clearance of 8-OHdG adducts from the genome. Photon radiation treatment was associated with a more detrimental cellular impact when compared to the same dose of proton radiation. These results are indicative of a radiation-induced dose-dependent decrease in mitochondrial function, an increase in senescence and astrogliosis, and impairment of the DNA repair capabilities in healthy glial cells. Photon irradiation was associated with a more significant disruption in mitochondrial function and base-excision repair mechanisms in vitro in comparison to proton treatment.
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Affiliation(s)
- Kristen H Hutson
- Molecular Sciences and Nanotechnology, Louisiana Tech University, Ruston, USA
| | - Kaitlynn Willis
- School of Biological Sciences, Louisiana Tech University, Ruston, USA
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17
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Kim DS, Park KE, Kwak YJ, Bae MK, Bae SK, Jang IS, Jang HO. Agrimonia pilosa Ledeb Root Extract: Anti-Inflammatory Activities of the Medicinal Herb in LPS-Induced Inflammation. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2020; 48:1875-1893. [PMID: 33308100 DOI: 10.1142/s0192415x20500949] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Inflammation regulation is essential for maintaining healthy functions and normal homeostasis of the body. Porphyromonas gingivalis (P. gingivalis) is a gram-negative anaerobic bacterium and a major pathogen that causes oral inflammation and other systemic inflammations. This study aims to examine the anti-inflammatory effects of Agrimonia pilosa Ledeb root extracts (APL-ME) in Porphyromonas gingivalis LPS-induced RAW 264.7 cells and find anti-inflammatory effect compounds of APL-ME. The anti-inflammatory effects of APL-ME were evaluated anti-oxidant activity, cell viability, nitrite concentration, pro-inflammatory cytokines (interleukin-1[Formula: see text], interleukin-6, tumor necrosis factor (TNF)-[Formula: see text], and anti-inflammatory cytokine (interleukin-10 (IL-10)). Also, Inflammation related genes and proteins, cyclooxygenase (COX)-2, inducible nitric oxide synthase (iNOS), expression were decreased by APL-ME and mitogen-activated protein kinase (MAPK) signaling proteins expression was regulated by APL-ME. Liquid chromatography-mass spectrometer (LC/MS)-MS analysis results indicated that several components were detected in APL-ME. Our study indicated that APL-ME suppressed nitrite concentrations, pro-inflammatory cytokines such as IL-1[Formula: see text], IL-6 and TNF-[Formula: see text] in P. gingivalis LPS induced RAW 264.7 cells. However, IL-10 expression was increased by ALP-ME. In addition, protein expressions of COX-2 and iNOS were inhibited APL-ME extracts dose-dependently. According to these results, APL-ME has anti-inflammatory effects in P. gingivalis LPS induced RAW 264.7 cells.
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Affiliation(s)
- Da-Sol Kim
- Department of Dental Pharmacology, School of Dentistry, Pusan National University, Yangsan-si 50612, Republic of Korea.,Periodontal Disease Signaling Network Research Center (MRC), School of Dentistry, Pusan National University, Yangsan-si 50612, Republic of Korea
| | - Kyoung-Eun Park
- Department of Dental Pharmacology, School of Dentistry, Pusan National University, Yangsan-si 50612, Republic of Korea
| | - Yeon-Ju Kwak
- Research Institute of GH BioFarm, Gagopa-Healing Food, Changwon-si, Republic of Korea
| | - Moon-Kyoung Bae
- Department of Oral Physiology, School of Dentistry, Pusan National University, Yangsan-si 50612, Republic of Korea.,Periodontal Disease Signaling Network Research Center (MRC), School of Dentistry, Pusan National University, Yangsan-si 50612, Republic of Korea
| | - Soo-Kyung Bae
- Department of Dental Pharmacology, School of Dentistry, Pusan National University, Yangsan-si 50612, Republic of Korea.,Periodontal Disease Signaling Network Research Center (MRC), School of Dentistry, Pusan National University, Yangsan-si 50612, Republic of Korea
| | - Ik-Soon Jang
- Division of Life Science, Korea Basic Science Institute, Daejeon 34133, Republic of Korea
| | - Hye-Ock Jang
- Department of Dental Pharmacology, School of Dentistry, Pusan National University, Yangsan-si 50612, Republic of Korea
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18
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McFall A, Nicklin SA, Work LM. The counter regulatory axis of the renin angiotensin system in the brain and ischaemic stroke: Insight from preclinical stroke studies and therapeutic potential. Cell Signal 2020; 76:109809. [PMID: 33059037 PMCID: PMC7550360 DOI: 10.1016/j.cellsig.2020.109809] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 10/08/2020] [Accepted: 10/09/2020] [Indexed: 01/01/2023]
Abstract
Stroke is the 2nd leading cause of death worldwide and the leading cause of physical disability and cognitive issues. Although we have made progress in certain aspects of stroke treatment, the consequences remain substantial and new treatments are needed. Hypertension has long been recognised as a major risk factor for stroke, both haemorrhagic and ischaemic. The renin angiotensin system (RAS) plays a key role in blood pressure regulation and this, plus local expression and signalling of RAS in the brain, both support the potential for targeting this axis therapeutically in the setting of stroke. While historically, focus has been on suppressing classical RAS signalling through the angiotensin type 1 receptor (AT1R), the identification of a counter-regulatory axis of the RAS signalling via the angiotensin type 2 receptor (AT2R) and Mas receptor has renewed interest in targeting the RAS. This review describes RAS signalling in the brain and the potential of targeting the Mas receptor and AT2R in preclinical models of ischaemic stroke. The animal and experimental models, and the route and timing of intervention, are considered from a translational perspective.
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Affiliation(s)
- Aisling McFall
- Institute of Cardiovascular & Medical Sciences, College of Medical, Veterinary & Life Sciences, University of Glasgow, Glasgow, UK
| | - Stuart A Nicklin
- Institute of Cardiovascular & Medical Sciences, College of Medical, Veterinary & Life Sciences, University of Glasgow, Glasgow, UK
| | - Lorraine M Work
- Institute of Cardiovascular & Medical Sciences, College of Medical, Veterinary & Life Sciences, University of Glasgow, Glasgow, UK.
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19
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Ferrario CM, Ahmad S, Groban L. Twenty years of progress in angiotensin converting enzyme 2 and its link to SARS-CoV-2 disease. Clin Sci (Lond) 2020; 134:2645-2664. [PMID: 33063823 PMCID: PMC9055624 DOI: 10.1042/cs20200901] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 09/30/2020] [Accepted: 10/05/2020] [Indexed: 12/22/2022]
Abstract
The virulence of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and the aggressive nature of the disease has transformed the universal pace of research in the desperate attempt to seek effective therapies to halt the morbidity and mortality of this pandemic. The rapid sequencing of the SARS-CoV-2 virus facilitated identification of the receptor for angiotensin converting enzyme 2 (ACE2) as the high affinity binding site that allows virus endocytosis. Parallel evidence that coronavirus disease 2019 (COVID-19) disease evolution shows greater lethality in patients with antecedent cardiovascular disease, diabetes, or even obesity questioned the potential unfavorable contribution of angiotensin converting enzyme (ACE) inhibitors or angiotensin II (Ang II) receptor blockers as facilitators of adverse outcomes due to the ability of these therapies to augment the transcription of Ace2 with consequent increase in protein formation and enzymatic activity. We review, here, the specific studies that support a role of these agents in altering the expression and activity of ACE2 and underscore that the robustness of the experimental data is associated with weak clinical long-term studies of the existence of a similar regulation of tissue or plasma ACE2 in human subjects.
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Affiliation(s)
- Carlos M. Ferrario
- Departments of Surgery and Physiology-Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC 27157, U.S.A
| | - Sarfaraz Ahmad
- Department of Surgery, Wake Forest School of Medicine, Winston-Salem, NC 27157, U.S.A
| | - Leanne Groban
- Department of Anesthesiology, Wake Forest School of Medicine, Winston-Salem, NC 27157, U.S.A
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20
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Andrews RN, Bloomer EG, Olson JD, Hanbury DB, Dugan GO, Whitlow CT, Cline JM. Non-Human Primates Receiving High-Dose Total-Body Irradiation are at Risk of Developing Cerebrovascular Injury Years Postirradiation. Radiat Res 2020; 194:277-287. [PMID: 32942304 PMCID: PMC7583660 DOI: 10.1667/rade-20-00051.1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/08/2020] [Indexed: 12/15/2022]
Abstract
Nuclear accidents and acts of terrorism have the potential to expose thousands of people to high-dose total-body iradiation (TBI). Those who survive the acute radiation syndrome are at risk of developing chronic, degenerative radiation-induced injuries [delayed effects of acute radiation (DEARE)] that may negatively affect quality of life. A growing body of literature suggests that the brain may be vulnerable to radiation injury at survivable doses, yet the long-term consequences of high-dose TBI on the adult brain are unclear. Herein we report the occurrence of lesions consistent with cerebrovascular injury, detected by susceptibility-weighted magnetic resonance imaging (MRI), in a cohort of non-human primate [(NHP); rhesus macaque, Macaca mulatta] long-term survivors of high-dose TBI (1.1-8.5 Gy). Animals were monitored longitudinally with brain MRI (approximately once every three years). Susceptibility-weighted images (SWI) were reviewed for hypointensities (cerebral microbleeds and/or focal necrosis). SWI hypointensities were noted in 13% of irradiated NHP; lesions were not observed in control animals. A prior history of exposure was correlated with an increased risk of developing a lesion detectable by MRI (P = 0.003). Twelve of 16 animals had at least one brain lesion present at the time of the first MRI evaluation; a subset of animals (n = 7) developed new lesions during the surveillance period (3.7-11.3 years postirradiation). Lesions occurred with a predilection for white matter and the gray-white matter junction. The majority of animals with lesions had one to three SWI hypointensities, but some animals had multifocal disease (n = 2). Histopathologic evaluation of deceased animals within the cohort (n = 3) revealed malformation of the cerebral vasculature and remodeling of the blood vessel walls. There was no association between comorbid diabetes mellitus or hypertension with SWI lesion status. These data suggest that long-term TBI survivors may be at risk of developing cerebrovascular injury years after irradiation.
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Affiliation(s)
- Rachel N. Andrews
- Department of Radiation Oncology, Section of Radiation Biology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina 27157
- Department of Pathology, Section on Comparative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina 27157
- Department of Wake Forest Baptist Comprehensive Cancer Center, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina 27157
| | - Ethan G. Bloomer
- University of Florida, College of Veterinary Medicine, Gainesville, Florida 32608
| | - John D. Olson
- Department of Pathology, Section on Comparative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina 27157
| | - David B. Hanbury
- Department of Psychology, Averett University, Danville, Virginia 24541
| | - Gregory O. Dugan
- Department of Pathology, Section on Comparative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina 27157
| | - Christopher T. Whitlow
- Department of Wake Forest Baptist Comprehensive Cancer Center, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina 27157
- Department of Radiology, Section of Neuroradiology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina 27157
- Department of Biomedical Engineering, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina 27157
- Department of Biostatistics and Data Science, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina 27157
| | - J. Mark Cline
- Department of Pathology, Section on Comparative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina 27157
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21
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Passaglia P, Faim FDL, Batalhão ME, Bendhack LM, Antunes-Rodrigues J, Ulloa L, Kanashiro A, Carnio EC. Central angiotensin-(1-7) attenuates systemic inflammation via activation of sympathetic signaling in endotoxemic rats. Brain Behav Immun 2020; 88:606-618. [PMID: 32335195 PMCID: PMC7643008 DOI: 10.1016/j.bbi.2020.04.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 04/21/2020] [Accepted: 04/22/2020] [Indexed: 01/21/2023] Open
Abstract
Angiotensin-(1-7) [Ang-(1-7)] is an angiotensin-derived neuropeptide with potential anti-hypertensive and anti-inflammatory properties. However, a possible action of Ang-(1-7) in neuroimmune interactions to regulate inflammatory response has not been explored. Thus, the aim of this study was to determine whether the intracerebroventricular (i.c.v.) administration of Ang-(1-7) can modulate systemic inflammation via sympathetic efferent circuits. Wistar male rats received systemic administration of lipopolysaccharide (LPS) (1.5 mg/Kg). Ang-(1-7) (0.3 nmol in 2 µL) promoted the release of splenic norepinephrine and attenuated tumor necrosis factor (TNF) and nitric oxide (NO), but increased interleukin-10 (IL-10), levels in the serum, spleen, and liver in endotoxemic rats. Furthermore, 6-hydroxydopamine-induced chemical sympathectomy (100 mg/Kg, intravenous) or i.c.v. administration of Mas receptor antagonist A779 (3 nmol in 2 µL) abolished the anti-inflammatory effects of central Ang-(1-7) injection. Moreover, this treatment did not alter the plasmatic LPS-induced corticosterone and vasopressin. The administration of Ang-(1-7) reverted the low resistance in response to catecholamines of rings of thoracic aorta isolated from endotoxemic rats, treated or not, with this peptide by a mechanism dependent on the regulation of NO released from perivascular adipose tissue. Together, our results indicate that Ang-(1-7) regulates systemic inflammation and vascular hyporesponsiveness in endotoxemia via activation of a central Mas receptors/sympathetic circuits/norepinephrine axis and provide novel mechanistic insights into the anti-inflammatory Ang-(1-7) properties.
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Affiliation(s)
- Patrícia Passaglia
- Department of Physiology, Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, SP, Brazil.
| | - Felipe de Lima Faim
- Department of Physiology, Ribeirão Preto Medical School – University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Marcelo Eduardo Batalhão
- Department of General and Specialized Nursing Ribeirão Preto, College of Nursing – University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Lusiane Maria Bendhack
- Department of Physics and Chemistry, Faculty of Pharmaceutical Sciences of Ribeirão Preto, Ribeirão Preto - University of São Paulo, Ribeirão Preto, SP, Brazil
| | - José Antunes-Rodrigues
- Department of Physiology, Ribeirão Preto Medical School – University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Luis Ulloa
- Center for Perioperative Organ Protection, Department of Anesthesiology, Duke University Medical Center, Durham, NC 27710, USA
| | - Alexandre Kanashiro
- Department of Neurosciences and Behavior, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Evelin Capellari Carnio
- Department of Physiology, Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, SP, Brazil; Department of General and Specialized Nursing Ribeirão Preto, College of Nursing - University of São Paulo, Ribeirão Preto, SP, Brazil.
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22
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Khodamoradi E, Hoseini-Ghahfarokhi M, Amini P, Motevaseli E, Shabeeb D, Musa AE, Najafi M, Farhood B. Targets for protection and mitigation of radiation injury. Cell Mol Life Sci 2020; 77:3129-3159. [PMID: 32072238 PMCID: PMC11104832 DOI: 10.1007/s00018-020-03479-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 02/04/2020] [Accepted: 02/07/2020] [Indexed: 02/06/2023]
Abstract
Protection of normal tissues against toxic effects of ionizing radiation is a critical issue in clinical and environmental radiobiology. Investigations in recent decades have suggested potential targets that are involved in the protection against radiation-induced damages to normal tissues and can be proposed for mitigation of radiation injury. Emerging evidences have been shown to be in contrast to an old dogma in radiation biology; a major amount of reactive oxygen species (ROS) production and cell toxicity occur during some hours to years after exposure to ionizing radiation. This can be attributed to upregulation of inflammatory and fibrosis mediators, epigenetic changes and disruption of the normal metabolism of oxygen. In the current review, we explain the cellular and molecular changes following exposure of normal tissues to ionizing radiation. Furthermore, we review potential targets that can be proposed for protection and mitigation of radiation toxicity.
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Affiliation(s)
- Ehsan Khodamoradi
- Radiology and Nuclear Medicine Department, School of Paramedical Sciences, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mojtaba Hoseini-Ghahfarokhi
- Radiology and Nuclear Medicine Department, School of Paramedical Sciences, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Peyman Amini
- Department of Radiology, Faculty of Paramedical, Tehran University of Medical Sciences, Tehran, Iran
| | - Elahe Motevaseli
- Department of Molecular Medicine, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Dheyauldeen Shabeeb
- Department of Physiology, College of Medicine, University of Misan, Misan, Iraq
- Misan Radiotherapy Center, Misan, Iraq
| | - Ahmed Eleojo Musa
- Department of Medical Physics, Tehran University of Medical Sciences (International Campus), Tehran, Iran
| | - Masoud Najafi
- Radiology and Nuclear Medicine Department, School of Paramedical Sciences, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - Bagher Farhood
- Department of Medical Physics and Radiology, Faculty of Paramedical Sciences, Kashan University of Medical Sciences, Kashan, Iran.
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23
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Duan R, Xue X, Zhang QQ, Wang SY, Gong PY, E Y, Jiang T, Zhang YD. ACE2 activator diminazene aceturate ameliorates Alzheimer's disease-like neuropathology and rescues cognitive impairment in SAMP8 mice. Aging (Albany NY) 2020; 12:14819-14829. [PMID: 32701063 PMCID: PMC7425432 DOI: 10.18632/aging.103544] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/04/2020] [Indexed: 01/13/2023]
Abstract
Previously, we revealed that brain Ang-(1-7) deficiency was involved in the pathogenesis of sporadic Alzheimer's disease (AD). We speculated that restoration of brain Ang-(1-7) levels might have a therapeutic effect against AD. However, the relatively short duration of biological effect limited the application of Ang-(1-7) in animal experiments. Since Ang-(1-7) is generated by its metabolic enzyme ACE2, we then tested the efficacy of an ACE2 activator diminazene aceturate (DIZE) on AD-like neuropathology and cognitive impairment in senescence-accelerated mouse prone substrain 8 (SAMP8) mice, an animal model of sporadic AD. Eight-month-old SAMP8 mice were injected intraperitoneally with vehicle or DIZE once a day for 30 consecutive days. DIZE markedly elevated brain Ang-(1-7) and MAS1 levels. Meanwhile, DIZE significantly reduced the levels of Aβ1-42, hyperphosphorylated tau and pro-inflammatory cytokines in the brain. The synaptic and neuronal losses in the brain were ameliorated by DIZE. Importantly, DIZE improved spatial cognitive functions in the Morris water maze test. In conclusion, this study demonstrates that DIZE ameliorates AD-like neuropathology and rescues cognitive impairment in SAMP8 mice. These beneficial effects of DIZE may be achieved by activating brain ACE2/Ang-(1-7)/MAS1 axis. These findings highlight brain ACE2/Ang-(1-7)/MAS1 axis as a potential target for the treatment of sporadic AD.
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Affiliation(s)
- Rui Duan
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Xiao Xue
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, People's Republic of China
| | - Qiao-Quan Zhang
- Department of Pathology, Nanjing Brain Hospital, Nanjing Medical University, Nanjing 210029, People's Republic of China
| | - Si-Yu Wang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, People's Republic of China
| | - Peng-Yu Gong
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, People's Republic of China
| | - Yan E
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, People's Republic of China
| | - Teng Jiang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, People's Republic of China
| | - Ying-Dong Zhang
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China.,Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, People's Republic of China
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24
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Turnquist C, Harris BT, Harris CC. Radiation-induced brain injury: current concepts and therapeutic strategies targeting neuroinflammation. Neurooncol Adv 2020; 2:vdaa057. [PMID: 32642709 PMCID: PMC7271559 DOI: 10.1093/noajnl/vdaa057] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Continued improvements in cancer therapies have increased the number of long-term cancer survivors. Radiation therapy remains one of the primary treatment modalities with about 60% of newly diagnosed cancer patients receiving radiation during the course of their disease. While radiation therapy has dramatically improved patient survival in a number of cancer types, the late effects remain a significant factor affecting the quality of life particularly in pediatric patients. Radiation-induced brain injury can result in cognitive dysfunction, including hippocampal-related learning and memory dysfunction that can escalate to dementia. In this article, we review the current understanding of the mechanisms behind radiation-induced brain injury focusing on the role of neuroinflammation and reduced hippocampal neurogenesis. Approaches to prevent or ameliorate treatment-induced side effects are also discussed along with remaining challenges in the field.
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Affiliation(s)
- Casmir Turnquist
- University of Oxford Medical School, John Radcliffe Hospital, Oxford, UK
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA
| | - Brent T Harris
- Departments of Neurology and Pathology, Georgetown University Medical Center, Washington, District of Columbia, USA
| | - Curtis C Harris
- Laboratory of Human Carcinogenesis, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA
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25
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Janatpour ZC, Korotcov A, Bosomtwi A, Dardzinski BJ, Symes AJ. Subcutaneous Administration of Angiotensin-(1-7) Improves Recovery after Traumatic Brain Injury in Mice. J Neurotrauma 2019; 36:3115-3131. [DOI: 10.1089/neu.2019.6376] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Affiliation(s)
- Zachary C. Janatpour
- Department of Pharmacology and Molecular Therapeutics, Program in Molecular and Cell Biology, Uniformed Services University, Bethesda, Maryland
| | - Alexandru Korotcov
- Translational Imaging Core, Center for Neuroscience and Regenerative Medicine, Uniformed Services University, Bethesda, Maryland
| | - Asamoah Bosomtwi
- Translational Imaging Core, Center for Neuroscience and Regenerative Medicine, Uniformed Services University, Bethesda, Maryland
| | - Bernard J. Dardzinski
- Translational Imaging Core, Center for Neuroscience and Regenerative Medicine, Uniformed Services University, Bethesda, Maryland
- Department of Radiology and Radiological Sciences, Uniformed Services University, Bethesda, Maryland
| | - Aviva J. Symes
- Department of Pharmacology and Molecular Therapeutics, Program in Molecular and Cell Biology, Uniformed Services University, Bethesda, Maryland
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26
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Nassif EF, Arsène-Henry A, Kirova YM. Brain metastases and treatment: multiplying cognitive toxicities. Expert Rev Anticancer Ther 2019; 19:327-341. [PMID: 30755047 DOI: 10.1080/14737140.2019.1582336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
INTRODUCTION Thirty per cent of cancer patients develop brain metastases, with multiple combination or sequential treatment modalities available, to treat systemic or central nervous system (CNS) disease. Most patients experience toxicities as a result of these treatments, of which cognitive impairment is one of the adverse events most commonly reported, causing major impairment of the patient's quality of life. Areas covered: This article reviews the role of cancer treatments in cognitive decline of patients with brain metastases: surgery, radiotherapy, chemotherapy, targeted therapies, immunotherapies and hormone therapy. Pathological and molecular mechanisms, as well as future directions for limiting cognitive toxicities are also presented. Other causes of cognitive impairment in this population are discussed in order to refine the benefit-risk balance of each treatment modality. Expert opinion: Cumulative cognitive toxicity should be taken into account, and tailored to the patient's cognitive risk in the light of the expected survival benefit. Standardization of cognitive assessment in this context is needed in order to better appreciate each treatment's responsibility in cognitive impairment, keeping in mind disease itself impacts cognition in this context.
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Affiliation(s)
- Elise F Nassif
- a Department of Radiotherapy , Institut Curie , Paris , France
| | | | - Youlia M Kirova
- a Department of Radiotherapy , Institut Curie , Paris , France
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27
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Liang H, Chen A, Lai X, Liu J, Wu J, Kang Y, Wang X, Shao L. Neuroinflammation is induced by tongue-instilled ZnO nanoparticles via the Ca 2+-dependent NF-κB and MAPK pathways. Part Fibre Toxicol 2018; 15:39. [PMID: 30340606 PMCID: PMC6194560 DOI: 10.1186/s12989-018-0274-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Accepted: 09/05/2018] [Indexed: 12/29/2022] Open
Abstract
Background The extensive biological applications of zinc oxide nanoparticles (ZnO NPs) in stomatology have created serious concerns about their biotoxicity. In our previous study, ZnO NPs were confirmed to transfer to the central nervous system (CNS) via the taste nerve pathway and cause neurodegeneration after 30 days of tongue instillation. However, the potential adverse effects on the brain caused by tongue-instilled ZnO NPs are not fully known. Methods In this study, the biodistribution of Zn, cerebral histopathology and inflammatory responses were analysed after 30 days of ZnO NPs tongue instillation. Moreover, the molecular mechanisms underlying neuroinflammation in vivo were further elucidated by treating BV2 and PC12 cells with ZnO NPs in vitro. Results This analysis indicated that ZnO NPs can transfer into the CNS, activate glial cells and cause neuroinflammation after tongue instillation. Furthermore, exposure to ZnO NPs led to a reduction in cell viability and induction of inflammatory response and calcium influx in BV2 and PC12 cells. The mechanism underlying how ZnO NPs induce neuroinflammation via the Ca2+-dependent NF-κB, ERK and p38 activation pathways was verified at the cytological level. Conclusion This study provided a new way how NPs, such as ZnO NPs, induce neuroinflammation via the taste nerve translocation pathway, a new mechanism for ZnO NPs-induced neuroinflammation and a new direction for nanomaterial toxicity analysis. Electronic supplementary material The online version of this article (10.1186/s12989-018-0274-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Huimin Liang
- Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.,Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Guangzhou, 510515, China
| | - Aijie Chen
- Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Xuan Lai
- Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Jia Liu
- Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Junrong Wu
- Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yiyuan Kang
- Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Xinying Wang
- Zhujiang Hospital of Southern Medical University, Guangzhou, 510515, China
| | - Longquan Shao
- Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China. .,Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Guangzhou, 510515, China.
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28
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Li P, Chen XR, Xu F, Liu C, Li C, Liu H, Wang H, Sun W, Sheng YH, Kong XQ. Alamandine attenuates sepsis-associated cardiac dysfunction via inhibiting MAPKs signaling pathways. Life Sci 2018; 206:106-116. [PMID: 29679702 DOI: 10.1016/j.lfs.2018.04.010] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 03/28/2018] [Accepted: 04/10/2018] [Indexed: 12/22/2022]
Abstract
Sepsis-induced myocardial dysfunction represents a major cause of death. Alamandine is an important biologically active peptide. The present study evaluated whether alamandine improves cardiac dysfunction, inflammation, and apoptosis, and affects the signaling pathways involved in these events. Experiments were carried out in mice treated with lipopolysaccharide (LPS) or alamandine, and in neonatal rat cardiomyocytes. Alamandine increased the ejection fraction and fractional shortening, both of which were decreased upon LPS infusion in mice. LPS and alamandine reduced blood pressure, and increased the expression of inducible nitric oxide synthase (iNOS) and endothelial NOS (eNOS) in the heart in mice. The LPS-induced decrease in α-myosin heavy chain (MHC) and β-MHC, and increase in S100 calcium binding protein A8 (S100A8) and S100A9, were reversed by alamandine pre-treatment. Alamandine pre-treatment prevented LPS-induced myocardial inflammation, apoptosis and autophagy. LPS increased p-ERK, p-JNK, and p-p38 levels, which were inhibited by alamandine. Dibutyryl cyclic AMP (db-cAMP) increased p-ERK, p-JNK, and p-p38 levels, and reversed the inhibitory effects of alamandine on the LPS-induced increase in p-ERK, p-JNK, and p-p38. Moreover, db-cAMP reduced the expression of α-MHC and β-MHC in cardiomyocytes, and reversed the almandine-induced attenuation of the LPS-induced decrease in α-MHC and β-MHC. These results indicate that alamandine attenuates LPS-induced cardiac dysfunction, resulting in increased cardiac contractility, and reduced inflammation, autophagy, and apoptosis. Furthermore, alamandine attenuates sepsis induced by LPS via inhibiting the mitogen-activated protein kinases (MAPKs) signaling pathways.
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Affiliation(s)
- Peng Li
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xi-Ru Chen
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Fei Xu
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Chi Liu
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Chang Li
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Hui Liu
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China; Department of Ultrasound, Children's Hospital of Nanjing Medical University, Nanjing, China
| | - Hui Wang
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Wei Sun
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yan-Hui Sheng
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
| | - Xiang-Qing Kong
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
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29
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Pinter M, Kwanten WJ, Jain RK. Renin-Angiotensin System Inhibitors to Mitigate Cancer Treatment-Related Adverse Events. Clin Cancer Res 2018; 24:3803-3812. [PMID: 29610292 DOI: 10.1158/1078-0432.ccr-18-0236] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 03/01/2018] [Accepted: 03/29/2018] [Indexed: 12/13/2022]
Abstract
Treatment-related side effects are a major clinical problem in cancer treatment. They lead to reduced compliance to therapy as well as increased morbidity and mortality. Well-known are the sequelae of chemotherapy on the heart, especially in childhood cancer survivors. Therefore, measures to mitigate the adverse events of cancer therapy may improve health and quality of life in patients with cancer, both in the short and long term. The renin-angiotensin system (RAS) affects all hallmarks of cancer, and blockage of the RAS is associated with an improved outcome in several cancer types. There is also increasing evidence that inhibition of the RAS might be able to alleviate or even prevent certain types of cancer treatment-related adverse effects. In this review, we summarize the potential of RAS inhibitors to mitigate cancer treatment-related adverse events, with a special emphasis on chemotherapy-induced cardiotoxicity, radiation injury, and arterial hypertension. Clin Cancer Res; 24(16); 3803-12. ©2018 AACR.
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Affiliation(s)
- Matthias Pinter
- Edwin L. Steele Laboratories for Tumor Biology, Department of Radiation Oncology, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts.,Division of Gastroenterology and Hepatology, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria
| | - Wilhelmus J Kwanten
- Edwin L. Steele Laboratories for Tumor Biology, Department of Radiation Oncology, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts.,Laboratory of Experimental Medicine and Paediatrics (LEMP), University of Antwerp, Antwerp, Belgium
| | - Rakesh K Jain
- Edwin L. Steele Laboratories for Tumor Biology, Department of Radiation Oncology, Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts.
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30
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da Silva Mansano N, Jorge IF, Chies AB, Viani GA, Spadella MA. Effects of telmisartan and losartan on irradiated testes. Life Sci 2018; 194:157-167. [DOI: 10.1016/j.lfs.2017.12.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Revised: 12/20/2017] [Accepted: 12/23/2017] [Indexed: 12/19/2022]
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31
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Tan X, Jiao PL, Wang YK, Wu ZT, Zeng XR, Li ML, Wang WZ. The phosphoinositide-3 kinase signaling is involved in neuroinflammation in hypertensive rats. CNS Neurosci Ther 2017; 23:350-359. [PMID: 28191736 DOI: 10.1111/cns.12679] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 01/20/2017] [Accepted: 01/22/2017] [Indexed: 12/20/2022] Open
Abstract
AIMS It has been demonstrated that neuroinflammation is associated with cardiovascular dysfunction. The phosphoinositide-3 kinase (PI3K) signaling in the rostral ventrolateral medulla (RVLM), a key region for sympathetic outflow, is upregulated and contributes to increased blood pressure (BP) and sympathetic outflow in hypertension. This study was designed to determine the role of the PI3K signaling in neuroinflammation in the RVLM of hypertension. METHODS The normotensive WKY rats were performed by intracisternal infusion of lipopolysaccharide (LPS) or angiotensin II (Ang II) for inducing neuroinflammation. Elisa was used to determine the level of proinflammatory cytokines. Western blot was employed to detect the protein expression of PI3K signaling pathway. Gene silencing of PI3K p110δ subunit and overexpression of angiotensin-converting enzyme 2 (ACE2) were realized by injecting related lentivirus into the RVLM. RESULTS In the spontaneously hypertensive rats (SHR), the PI3K signaling in the RVLM was upregulated compared with WKY, gene silencing of PI3K in the RVLM significantly reduced BP and renal sympathetic nerve activity (RSNA), but also decreased the levels of proinflammatory cytokines. In the WKY rats, central infusion of LPS and Ang II significantly elevated BP and RSNA, but also increased the levels of proinflammatory cytokines and PI3K signaling activation in the RVLM. These changes in the Ang II-induced hypertension were effectively prevented by gene silencing of PI3K in the RVLM. Furthermore, overexpression of ACE2 in the RVLM significantly attenuated high BP and neuroinflammation, as well as decreased the activation of PI3K signaling in hypertensive rats. CONCLUSION This study suggests that the PI3K signaling in the RVLM is involved in neuroinflammation in hypertension and plays an important role in the renin-angiotensin system-mediated changes in neuroinflammation in the RVLM.
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Affiliation(s)
- Xing Tan
- Department of Physiology and Center of Polar Medical Research, Second Military Medical University, Shanghai, China
| | - Pei-Lei Jiao
- Department of Physiology and Center of Polar Medical Research, Second Military Medical University, Shanghai, China
| | - Yang-Kai Wang
- Department of Physiology and Center of Polar Medical Research, Second Military Medical University, Shanghai, China
| | - Zhao-Tang Wu
- Department of Physiology and Center of Polar Medical Research, Second Military Medical University, Shanghai, China
| | - Xiao-Rong Zeng
- Institute of Cardiovascular Medical Research, West-South Medical University, Luzhou, China
| | - Miao-Ling Li
- Institute of Cardiovascular Medical Research, West-South Medical University, Luzhou, China
| | - Wei-Zhong Wang
- Department of Physiology and Center of Polar Medical Research, Second Military Medical University, Shanghai, China
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32
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Hammer A, Stegbauer J, Linker RA. Macrophages in neuroinflammation: role of the renin-angiotensin-system. Pflugers Arch 2017; 469:431-444. [PMID: 28190090 DOI: 10.1007/s00424-017-1942-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 01/18/2017] [Accepted: 01/23/2017] [Indexed: 12/12/2022]
Abstract
Macrophages are essential players of the innate immune system which are involved in the initiation and progression of various inflammatory and autoimmune diseases including neuroinflammation. In the past few years, it has become increasingly clear that the regulation of macrophage responses by the local tissue milieu is also influenced by mediators which were first discovered as regulators in the nervous or also cardiovascular system. Here, the renin-angiotensin system (RAS) is a major focus of current research. Besides its classical role in blood pressure control, body fluid, and electrolyte homeostasis, the RAS may influence (auto)immune responses, modulate T cells, and particularly act on macrophages via different signaling pathways. Activation of classical RAS pathways including angiotensin (Ang) II and AngII type 1 (AT1R) receptors may drive pro-inflammatory macrophage responses in neuroinflammation via regulation of chemokines. More recently, alternative RAS pathways were described, such as binding of Ang-(1-7) to its receptor Mas. Signaling via Mas pathways may counteract some of the AngII/AT1R-mediated effects. In macrophages, the Ang-(1-7)/Mas exerts beneficial effects on neuroinflammation via modulating macrophage polarization, migration, and T cell activation in vitro and in vivo. These data delineate a pivotal role of the RAS in inflammation of the nervous system and identify RAS modulation as a potential new target for immunotherapy with a special focus on macrophages.
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Affiliation(s)
- Anna Hammer
- Department of Neurology, University Hospital, Friedrich-Alexander University Erlangen-Nuremberg, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Johannes Stegbauer
- Department of Nephrology, University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Ralf A Linker
- Department of Neurology, University Hospital, Friedrich-Alexander University Erlangen-Nuremberg, Schwabachanlage 6, 91054 Erlangen, Germany.
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Mechanisms of radiotherapy-associated cognitive disability in patients with brain tumours. Nat Rev Neurol 2016; 13:52-64. [PMID: 27982041 DOI: 10.1038/nrneurol.2016.185] [Citation(s) in RCA: 295] [Impact Index Per Article: 36.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Standard treatment of primary and metastatic brain tumours includes high-dose megavoltage-range radiation to the cranial vault. About half of patients survive >6 months, and many attain long-term control or cure. However, 50-90% of survivors exhibit disabling cognitive dysfunction. The radiation-associated cognitive syndrome is poorly understood and has no effective prevention or long-term treatment. Attention has primarily focused on mechanisms of disability that appear at 6 months to 1 year after radiotherapy. However, recent studies show that CNS alterations and dysfunction develop much earlier following radiation exposure. This finding has prompted the hypothesis that subtle early forms of radiation-induced CNS damage could drive chronic pathophysiological processes that lead to permanent cognitive decline. This Review presents evidence of acute radiation-triggered CNS inflammation, injury to neuronal lineages, accessory cells and their progenitors, and loss of supporting structure integrity. Moreover, injury-related processes initiated soon after irradiation could synergistically alter the signalling microenvironment in progenitor cell niches in the brain and the hippocampus, which is a structure critical to memory and cognition. Progenitor cell niche degradation could cause progressive neuronal loss and cognitive disability. The concluding discussion addresses future directions and potential early treatments that might reverse degenerative processes before they can cause permanent cognitive disability.
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Villalobos LA, San Hipólito-Luengo Á, Ramos-González M, Cercas E, Vallejo S, Romero A, Romacho T, Carraro R, Sánchez-Ferrer CF, Peiró C. The Angiotensin-(1-7)/Mas Axis Counteracts Angiotensin II-Dependent and -Independent Pro-inflammatory Signaling in Human Vascular Smooth Muscle Cells. Front Pharmacol 2016; 7:482. [PMID: 28018220 PMCID: PMC5156706 DOI: 10.3389/fphar.2016.00482] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 11/25/2016] [Indexed: 01/08/2023] Open
Abstract
Background and Aims: Targeting inflammation is nowadays considered as a challenging pharmacological strategy to prevent or delay the development of vascular diseases. Angiotensin-(1-7) is a member of the renin-angiotensin system (RAS) that binds Mas receptors and has gained growing attention in the last years as a regulator of vascular homeostasis. Here, we explored the capacity of Ang-(1-7) to counteract human aortic smooth muscle cell (HASMC) inflammation triggered by RAS-dependent and -independent stimuli, such as Ang II or interleukin (IL)-1β. Methods and Results: In cultured HASMC, the expression of inducible nitric oxide synthase (iNOS) and the release of nitric oxide were stimulated by both Ang II and IL-1β, as determined by Western blot and indirect immunofluorescence or the Griess method, respectively. iNOS induction was inhibited by Ang-(1-7) in a concentration-dependent manner. This effect was equally blocked by two different Mas receptor antagonists, A779 and D-Pro7-Ang-(1-7), suggesting the participation of a unique Mas receptor subtype. Using pharmacological inhibitors, the induction of iNOS was proven to rely on the consecutive upstream activation of NADPH oxidase and nuclear factor (NF)-κB. Indeed, Ang-(1-7) markedly inhibited the activation of the NADPH oxidase and subsequently of NF-κB, as determined by lucigenin-derived chemiluminescence and electromobility shift assay, respectively. Conclusion: Ang-(1-7) can act as a counter-regulator of the inflammation of vascular smooth muscle cells triggered by Ang II, but also by other stimuli beyond the RAS. Activating or mimicking the Ang-(1-7)/Mas axis may represent a pharmacological opportunity to attenuate the pro-inflammatory environment that promotes and sustains the development of vascular diseases.
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Affiliation(s)
- Laura A Villalobos
- Department of Pharmacology, School of Medicine, Universidad Autónoma de Madrid Madrid, Spain
| | | | - Mariella Ramos-González
- Department of Pharmacology, School of Medicine, Universidad Autónoma de Madrid Madrid, Spain
| | - Elena Cercas
- Department of Pharmacology, School of Medicine, Universidad Autónoma de Madrid Madrid, Spain
| | - Susana Vallejo
- Department of Pharmacology, School of Medicine, Universidad Autónoma de Madrid Madrid, Spain
| | - Alejandra Romero
- Department of Pharmacology, School of Medicine, Universidad Autónoma de Madrid Madrid, Spain
| | - Tania Romacho
- Department of Pharmacology, School of Medicine, Universidad Autónoma de Madrid Madrid, Spain
| | - Raffaele Carraro
- Service of Endocrinology, Hospital de La PrincesaMadrid, Spain; Department of Medicine, School of Medicine, Universidad Autónoma de MadridMadrid, Spain
| | - Carlos F Sánchez-Ferrer
- Department of Pharmacology, School of Medicine, Universidad Autónoma de Madrid Madrid, Spain
| | - Concepción Peiró
- Department of Pharmacology, School of Medicine, Universidad Autónoma de Madrid Madrid, Spain
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Neuroprotective mechanisms of the ACE2-angiotensin-(1-7)-Mas axis in stroke. Curr Hypertens Rep 2016; 17:3. [PMID: 25620630 DOI: 10.1007/s11906-014-0512-2] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The discovery of beneficial neuroprotective effects of the angiotensin converting enzyme 2-angiotensin-(1-7)-Mas axis [ACE2-Ang-(1-7)-Mas] in ischemic and hemorrhagic stroke has spurred interest in a more complete characterization of its mechanisms of action. Here, we summarize findings that describe the protective role of the ACE2-Ang-(1-7)-Mas axis in stroke, along with a focused discussion on the potential mechanisms of neuroprotective effects of Ang-(1-7) in stroke. The latter incorporates evidence describing the actions of Ang-(1-7) to counter the deleterious effects of angiotensin II (AngII) via its type 1 receptor, including anti-inflammatory, anti-oxidant, vasodilatory, and angiogenic effects, and the role of altered kinase-phosphatase signaling. Interactions of Mas with other receptors, including bradykinin receptors and AngII type 2 receptors are also considered. A more complete understanding of the mechanisms of action of Ang-(1-7) to elicit neuroprotection will serve as an essential step toward research into potential targeted therapeutics in the clinical setting.
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Bader M, Alenina N, Andrade-Navarro MA, Santos RA. MAS and its related G protein-coupled receptors, Mrgprs. Pharmacol Rev 2015; 66:1080-105. [PMID: 25244929 DOI: 10.1124/pr.113.008136] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The Mas-related G protein-coupled receptors (Mrgprs or Mas-related genes) comprise a subfamily of receptors named after the first discovered member, Mas. For most Mrgprs, pruriception seems to be the major function based on the following observations: 1) they are relatively promiscuous in their ligand specificity with best affinities for itch-inducing substances; 2) they are expressed in sensory neurons and mast cells in the skin, the main cellular components of pruriception; and 3) they appear in evolution first in tetrapods, which have arms and legs necessary for scratching to remove parasites or other noxious substances from the skin before they create harm. Because parasites coevolved with hosts, each species faced different parasitic challenges, which may explain another striking observation, the multiple independent duplication and expansion events of Mrgpr genes in different species as a consequence of parallel adaptive evolution. Their predominant expression in dorsal root ganglia anticipates additional functions of Mrgprs in nociception. Some Mrgprs have endogenous ligands, such as β-alanine, alamandine, adenine, RF-amide peptides, or salusin-β. However, because the functions of these agonists are still elusive, the physiologic role of the respective Mrgprs needs to be clarified. The best studied Mrgpr is Mas itself. It was shown to be a receptor for angiotensin-1-7 and to exert mainly protective actions in cardiovascular and metabolic diseases. This review summarizes the current knowledge about Mrgprs, their evolution, their ligands, their possible physiologic functions, and their therapeutic potential.
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Affiliation(s)
- Michael Bader
- Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (M.B., N.A., M.A.A.-N.); Charité-University Medicine, Berlin, Germany (M.B.); Institute for Biology, University of Lübeck, Lübeck, Germany (M.B.); and Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil (M.B., N.A., R.A.S.)
| | - Natalia Alenina
- Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (M.B., N.A., M.A.A.-N.); Charité-University Medicine, Berlin, Germany (M.B.); Institute for Biology, University of Lübeck, Lübeck, Germany (M.B.); and Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil (M.B., N.A., R.A.S.)
| | - Miguel A Andrade-Navarro
- Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (M.B., N.A., M.A.A.-N.); Charité-University Medicine, Berlin, Germany (M.B.); Institute for Biology, University of Lübeck, Lübeck, Germany (M.B.); and Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil (M.B., N.A., R.A.S.)
| | - Robson A Santos
- Max-Delbrück-Center for Molecular Medicine, Berlin, Germany (M.B., N.A., M.A.A.-N.); Charité-University Medicine, Berlin, Germany (M.B.); Institute for Biology, University of Lübeck, Lübeck, Germany (M.B.); and Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil (M.B., N.A., R.A.S.)
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Xu L, Dan M, Shao A, Cheng X, Zhang C, Yokel RA, Takemura T, Hanagata N, Niwa M, Watanabe D. Silver nanoparticles induce tight junction disruption and astrocyte neurotoxicity in a rat blood-brain barrier primary triple coculture model. Int J Nanomedicine 2015; 10:6105-18. [PMID: 26491287 PMCID: PMC4598217 DOI: 10.2147/ijn.s85265] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Silver nanoparticles (Ag-NPs) can enter the brain and induce neurotoxicity. However, the toxicity of Ag-NPs on the blood-brain barrier (BBB) and the underlying mechanism(s) of action on the BBB and the brain are not well understood. METHOD To investigate Ag-NP suspension (Ag-NPS)-induced toxicity, a triple coculture BBB model of rat brain microvascular endothelial cells, pericytes, and astrocytes was established. The BBB permeability and tight junction protein expression in response to Ag-NPS, NP-released Ag ions, and polystyrene-NP exposure were investigated. Ultrastructural changes of the microvascular endothelial cells, pericytes, and astrocytes were observed using transmission electron microscopy (TEM). Global gene expression of astrocytes was measured using a DNA microarray. RESULTS A triple coculture BBB model of primary rat brain microvascular endothelial cells, pericytes, and astrocytes was established, with the transendothelial electrical resistance values >200 Ω·cm(2). After Ag-NPS exposure for 24 hours, the BBB permeability was significantly increased and expression of the tight junction (TJ) protein ZO-1 was decreased. Discontinuous TJs were also observed between microvascular endothelial cells. After Ag-NPS exposure, severe mitochondrial shrinkage, vacuolations, endoplasmic reticulum expansion, and Ag-NPs were observed in astrocytes by TEM. Global gene expression analysis showed that three genes were upregulated and 20 genes were downregulated in astrocytes treated with Ag-NPS. Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis showed that the 23 genes were associated with metabolic processes, biosynthetic processes, response to stimuli, cell death, the MAPK pathway, and so on. No GO term and KEGG pathways were changed in the released-ion or polystyrene-NP groups. Ag-NPS inhibited the antioxidant defense of the astrocytes by increasing thioredoxin interacting protein, which inhibits the Trx system, and decreasing Nr4a1 and Dusp1. Meanwhile, Ag-NPS induced inflammation and apoptosis through modulation of the MAPK pathway or B-cell lymphoma-2 expression or mTOR activity in astrocytes. CONCLUSION These results draw our attention to the importance of Ag-NP-induced toxicity on the neurovascular unit and provide a better understanding of its toxicological mechanisms on astrocytes.
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Affiliation(s)
- Liming Xu
- National Institutes for Food and Drug Control, No 2, Temple of Heaven, Beijing, People’s Republic of China
- School of Information and Engineering, Wenzhou Medical University, Wenzhou, People’s Republic of China
| | - Mo Dan
- National Institutes for Food and Drug Control, No 2, Temple of Heaven, Beijing, People’s Republic of China
| | - Anliang Shao
- National Institutes for Food and Drug Control, No 2, Temple of Heaven, Beijing, People’s Republic of China
| | - Xiang Cheng
- National Institutes for Food and Drug Control, No 2, Temple of Heaven, Beijing, People’s Republic of China
- School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, People’s Republic of China
| | - Cuiping Zhang
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, People’s Republic of China
| | - Robert A Yokel
- College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Taro Takemura
- Nanotechnology Innovation Station for Nanoscale Science and Technology, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
| | - Nobutaka Hanagata
- Nanotechnology Innovation Station for Nanoscale Science and Technology, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
| | - Masami Niwa
- Department of Pharmacology, Nagasaki University, Nagasaki, Japan
- BBB Laboratory, PharmaCo-Cell Company, Ltd., Nagasaki, Japan
| | - Daisuke Watanabe
- Department of Pharmacology, Nagasaki University, Nagasaki, Japan
- BBB Laboratory, PharmaCo-Cell Company, Ltd., Nagasaki, Japan
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Bihl JC, Zhang C, Zhao Y, Xiao X, Ma X, Chen Y, Chen S, Zhao B, Chen Y. Angiotensin-(1-7) counteracts the effects of Ang II on vascular smooth muscle cells, vascular remodeling and hemorrhagic stroke: Role of the NFкB inflammatory pathway. Vascul Pharmacol 2015; 73:115-123. [PMID: 26264508 DOI: 10.1016/j.vph.2015.08.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 06/17/2015] [Accepted: 08/07/2015] [Indexed: 11/28/2022]
Abstract
Angiotensin (Ang)-(1-7) is a potential vasoprotective peptide. In the present study, we investigated its counteractive effects to Ang II on vascular smooth muscle cells (VSMCs) and intracerebral hemorrhagic stroke (ICH) through inflammatory mechanism. In in vitro experiments, human brain VSMCs (HBVSMCs) were treated with vehicle, Ang II, Ang II+Ang-(1-7), Ang II+A-779 or Ang II+Ang-(1-7)+A-779 (Mas receptor antagonist). HBVSMC proliferation, migration and apoptosis were determined by methyl thiazolyltetrazolium, wound healing assay and flow cytometry, respectively. In in vivo experiments, C57BL/6 mice were divided into vehicle, Ang II, Ang II+Ang-(1-7), Ang II+A-779 or Ang II+Ang-(1-7)+A-779 groups before they were subjected to collagenase-induced ICH or sham surgery. Hemorrhage volume and middle cerebral artery (MCA) remodeling were determined by histological analyses. Levels of NFκB, inhibitor of κBα (IκBα), tumor necrosis factor-α (TNF-α), monocyte chemoattractant protein 1 (MCP-1) and interleukin (IL-8) were measured by western blot or ELISA. We found that 1) Ang II increased HBVSMC migration, proliferation and apoptosis, and increased the blood pressure (BP), neurological deficit score, MCA remodeling and hemorrhage volume in ICH mice. 2) Ang-(1-7) counteracted these effects of Ang II, which was independent of BP, with the down-regulation of NFκB, up-regulation of IκBα, and decreased levels of TNF-α, MCP-1 and IL-8. 3) The beneficial effects of Ang-(1-7) could be abolished by A-779. In conclusion, Ang-(1-7) counteracts the effects of Ang II on ICH via modulating NFκB inflammation pathway in HBVSMCs and cerebral microvessels.
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Affiliation(s)
- Ji C Bihl
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435, USA
| | - Cheng Zhang
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435, USA
| | - Yuhui Zhao
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435, USA
| | - Xiang Xiao
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435, USA
| | - Xiaotang Ma
- Clinical Research Center and Department of Neurology, the Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong 524001, China
| | - Yusen Chen
- Clinical Research Center and Department of Neurology, the Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong 524001, China
| | - Shuzhen Chen
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435, USA
| | - Bin Zhao
- Clinical Research Center and Department of Neurology, the Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong 524001, China
| | - Yanfang Chen
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435, USA.,Clinical Research Center and Department of Neurology, the Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong 524001, China
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Endotoxin-induced skeletal muscle wasting is prevented by angiotensin-(1-7) through a p38 MAPK-dependent mechanism. Clin Sci (Lond) 2015; 129:461-76. [PMID: 25989282 DOI: 10.1042/cs20140840] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 05/19/2015] [Indexed: 12/19/2022]
Abstract
Skeletal muscle atrophy induced during sepsis syndrome produced by endotoxin in the form of LPS (lipopolysaccharide), is a pathological condition characterized by the loss of strength and muscle mass, an increase in MHC (myosin heavy chain) degradation, and an increase in the expression of atrogin-1 and MuRF-1 (muscle-specific RING-finger protein 1), two ubiquitin E3 ligases belonging to the ubiquitin-proteasome system. Ang-(1-7) [Angiotensin-(1-7)], through its Mas receptor, has beneficial effects in skeletal muscle. We evaluated in vivo the role of Ang-(1-7) and Mas receptor on the muscle wasting induced by LPS injection into C57BL/10J mice. In vitro studies were performed in murine C2C12 myotubes and isolated myofibres from EDL (extensor digitorum longus) muscle. In addition, the participation of p38 MAPK (mitogen-activated protein kinase) in the Ang-(1-7) effect on the LPS-induced muscle atrophy was evaluated. Our results show that Ang-(1-7) prevents the decrease in the diameter of myofibres and myotubes, the decrease in muscle strength, the diminution in MHC levels and the induction of atrogin-1 and MuRF-1 expression, all of which are induced by LPS. These effects were reversed by using A779, a Mas antagonist. Ang-(1-7) exerts these anti-atrophic effects at least in part by inhibiting the LPS-dependent activation of p38 MAPK both in vitro and in vivo. We have demonstrated for the first time that Ang-(1-7) counteracts the skeletal muscle atrophy induced by endotoxin through a mechanism dependent on the Mas receptor that involves a decrease in p38 MAPK phosphorylation. The present study indicates that Ang-(1-7) is a novel molecule with a potential therapeutic use to improve muscle wasting during endotoxin-induced sepsis syndrome.
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Pereboeva L, Harkins L, Wong S, Lamb LS. The safety of allogeneic innate lymphocyte therapy for glioma patients with prior cranial irradiation. Cancer Immunol Immunother 2015; 64:551-62. [PMID: 25676710 PMCID: PMC11029122 DOI: 10.1007/s00262-015-1662-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Accepted: 01/24/2015] [Indexed: 12/24/2022]
Abstract
The standard treatment of high-grade glioma presents a combination of radiotherapy, chemotherapy and surgery. Immunotherapy is proposed as a potential adjunct to standard cytotoxic regimens to target remaining microscopic disease following resection. We have shown ex vivo expanded/activated γδ T cells to be a promising innate lymphocyte therapy based on their recognition of stress antigens expressed on gliomas. However, successful integration of γδ T cell therapy protocols requires understanding the efficacy and safety of adoptively transferred immune cells in the post-treatment environment. The unique features of γδ T cell product and the environment (hypoxia, inflammation) can affect levels of expression of key cell receptors and secreted factors and either promote or hinder the feasibility of γδ T cell therapy. We investigated the potential for the γδ T cells to injure normal brain tissue that may have been stressed by treatment. We evaluated γδ T cell toxicity by assessing actual and correlative toxicity indicators in several available models including: (1) expression of stress markers on normal primary human astrocytes (as surrogate for brain parenchyma) after irradiation and temozolomide treatment, (2) cytotoxicity of γδ T cells on normal and irradiated primary astrocytes, (3) microglial activation and expression of stress-induced ligands in mouse brain after whole-brain irradiation and (4) expression of stress-induced markers on human brain tumors and on normal brain tissue. The lack of expression of stress-induced ligands in all tested models suggests that γδ T cell therapy is safe for brain tumor patients who undergo standard cytotoxic therapies.
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Affiliation(s)
- Larisa Pereboeva
- Division of Hematology and Oncology, School of Medicine, University of Alabama at Birmingham (UAB), 1824 6th Ave S, WTI 510C, Birmingham, AL, 35294, USA,
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Zimmerman MA, Baban B, Tipton AJ, O'Connor PM, Sullivan JC. Chronic ANG II infusion induces sex-specific increases in renal T cells in Sprague-Dawley rats. Am J Physiol Renal Physiol 2014; 308:F706-12. [PMID: 25503730 DOI: 10.1152/ajprenal.00446.2014] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 12/02/2014] [Indexed: 01/09/2023] Open
Abstract
Recent studies suggest that sex of the animal and T cell impact ANG II hypertension in Rag(-/-) mice, with females being protected relative to males. This study tested the hypothesis that ANG II results in greater increases in proinflammatory T cells and cytokines in males than in females. Male and female Sprague-Dawley (SD) rats, aged 12 wk, were treated with vehicle or ANG II (200 ng·kg(-1)·min(-1)) for 2 wk. Renal CD4(+) T cells and Tregs were comparable between vehicle-treated males and females, although males expressed more Th17 and IL-17(+) T cells and fewer IL-10(+) T cells than females. ANG II resulted in greater increases in CD4(+) T cells, Th17 cells, and IL-17(+) cells in males; Tregs increased only in females. We previously showed that ANG (1-7) antagonizes ANG II-induced increases in blood pressure in females and ANG (1-7) has been suggested to be anti-inflammatory. Renal ANG (1-7) levels were greater in female SD at baseline and following ANG II infusion. Additional rats were treated with ANG II plus the ANG (1-7)-mas receptor antagonist A-779 (48 μg·kg(-1)·h(-1)) to test the hypothesis that greater ANG (1-7) in females results in more Tregs relative to males. Inhibition of ANG (1-7) did not alter renal T cells in either sex. In conclusion, ANG II induces a sex-specific effect on the renal T cell profile. Males have greater increases in proinflammatory T cells, and females have greater increases in anti-inflammatory Tregs; however, sex differences in the renal T cell profile are not mediated by ANG (1-7).
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Affiliation(s)
| | - Babak Baban
- Department of Oral Biology, Georgia Regents University, Augusta, Georgia
| | - Ashlee J Tipton
- Department of Physiology, Georgia Regents University, Augusta, Georgia; and
| | - Paul M O'Connor
- Department of Physiology, Georgia Regents University, Augusta, Georgia; and
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Wheeler KT, Payne V, D'Agostino RB, Walb MC, Munley MT, Metheny-Barlow LJ, Robbins ME. Impact of breathing 100% oxygen on radiation-induced cognitive impairment. Radiat Res 2014; 182:580-5. [PMID: 25338095 DOI: 10.1667/rr13643.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Future space missions are expected to include increased extravehicular activities (EVAs) during which astronauts are exposed to high-energy space radiation while breathing 100% oxygen. Given that brain irradiation can lead to cognitive impairment, and that oxygen is a potent radiosensitizer, there is a concern that astronauts may be at greater risk of developing cognitive impairment when exposed to space radiation while breathing 100% O(2) during an EVA. To address this concern, unanesthetized, unrestrained, young adult male Fischer 344 × Brown Norway rats were allowed to breathe 100% O(2) for 30 min prior to, during and 2 h after whole-body irradiation with 0, 1, 3, 5 or 7 Gy doses of 18 MV X rays delivered from a medical linear accelerator at a dose rate of ~425 mGy/min. Irradiated and unirradiated rats breathing air (~21% O(2)) served as controls. Cognitive function was assessed 9 months postirradiation using the perirhinal cortex-dependent novel object recognition task. Cognitive function was not impaired until the rats breathing either air or 100% O(2) received a whole-body dose of 7 Gy. However, at all doses, cognitive function of the irradiated rats breathing 100% O(2) was improved over that of the irradiated rats breathing air. These data suggest that astronauts are not at greater risk of developing cognitive impairment when exposed to space radiation while breathing 100% O(2) during an EVA.
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Affiliation(s)
- Kenneth T Wheeler
- a Department of Radiation Oncology, Wake Forest School of Medicine, Winston-Salem, North Carolina 27157
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Torika N, Filipovich-Rimon T, Asraf K, Roasso E, Danon A, Fleisher-Berkovich S. Differential regulation of astrocyte prostaglandin response by kinins: possible role for mitogen activated protein kinases. Eur J Pharmacol 2014; 741:323-9. [PMID: 25169427 DOI: 10.1016/j.ejphar.2014.08.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 08/17/2014] [Accepted: 08/18/2014] [Indexed: 12/13/2022]
Abstract
The role of kinins, well known as peripheral inflammatory mediators, in the modulation of brain inflammation is not completely understood. The present data show that bradykinin, a B2 receptor agonist, enhanced both basal and lipopolysaccharide (LPS)-induced cyclooxygenase-2 mRNA and protein levels and prostaglandin E2 synthesis in primary rat astrocytes. By contrast, Lys-des-Arg(9)-bradykinin, which is a bradykinin breakdown product and a selective kinin B1 receptor agonist, attenuated both basal and LPS-induced astrocyte cyclooxygenase-2 mRNA levels and prostaglandin E2 production. Pre-treating the cells with p42/p44 MAPK but not with JNK or p38 inhibitors completely abrogated PGE2 synthesis in cells stimulated with LPS in the presence of bradykinin or bradykinin B1 receptor agonist. Bradykinin, but not the bradykinin B1 receptor agonist, augmented p42/p44 MAPK phosphorylation. The phosphorylation of JNK and p38 was not altered upon exposure to Bradykinin or the bradykinin B1 receptor agonist. These results suggest that the dual delayed effect of kinins on PGE2 synthesis may be due to differential regulation of COX-2 and signaling molecules such as p42/p44 MAPKs. Thus, kinins may exert opposing actions on brain inflammation and neurodegenerative diseases.
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Affiliation(s)
- Nofar Torika
- Department of Clinical Biochemistry and Pharmacology, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Talia Filipovich-Rimon
- Department of Clinical Biochemistry and Pharmacology, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Keren Asraf
- Department of Clinical Biochemistry and Pharmacology, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Ella Roasso
- Department of Clinical Biochemistry and Pharmacology, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Abraham Danon
- Department of Clinical Biochemistry and Pharmacology, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Sigal Fleisher-Berkovich
- Department of Clinical Biochemistry and Pharmacology, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel.
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