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Nigdelioglu Dolanbay S, Şirin S, Aslim B. Cocktail of three isoquinoline alkaloids derived from Glaucium grandiflorum Boiss. & A. Huet subsp. refractum (Nábelek) Mory inhibits the production of LPS-induced ROS, pro-inflammatory cytokines, and mediators through the down-regulation of p38 MAPK in BV-2 cells. Fitoterapia 2023; 170:105652. [PMID: 37595642 DOI: 10.1016/j.fitote.2023.105652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 08/09/2023] [Accepted: 08/15/2023] [Indexed: 08/20/2023]
Abstract
Glaucium grandiflorum extracts have traditionally been used to treat brain-related disorders. G. grandiflorum extracts also exhibited inhibitory effects on cholinesterase enzymes, as well as antigenotoxic activity. However, no research has been done on the effect of G. grandiflorum alkaloid extracts on the anti-oxidative and anti-inflammatory mechanisms. In this study we aimed to evaluate the anti-oxidative and anti-inflammatory activities of the alkaloid extract obtained from G. grandiflorum as well as the mechanisms responsible for their neuroprotective effects in neuronal damage caused by LPS in BV2 cells. We used LC-MS/MS and 1H, 13C NMR analysis to determine the presence of major alkaloids (allocryptopine, tetrahydropalmatine, and tetrahydroberberine N-oxide (trans-cannadine-N-oxide) in the alkaloid extracts. We used flow cytometry to study the alkaloid extracts' effects on ROS production; we also employed qRT-PCR and Western Blot to analyze the effects of oxidative stress and inflammation-related genes and proteins. ROS production within the cell was inhibited by chloroform alkaloid extract (CAE). There occurred marked CAE-induced reductions in IL-1β, Cox-2, and iNOS mRNA expressions. We also observed marked reductions in IL-6 and TNF-α mRNA expressions with methanol alkaloid extract (MAE). CAE effectively suppressed IL-1β and iNOS protein levels, especially as in qRT-PCR studies, while MAE effectively reduced IL-6 and TNF-α protein levels. Additionally, MAE was found to be prominent in suppressing the levels of Cox-2 protein, unlike qRT-PCR studies. According to our study findings, oxidative stress brought about by inflammation was suppressed by alkaloid extracts from G. grandiflorum which can be attributed to their suppressor effects on the pro-inflammatory cytokines-mediators, and p38 MAPK. As a result, a drug active substance that suppresses oxidative stress and inflammation has been brought to the neuropharmacological field.
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Affiliation(s)
| | - Seda Şirin
- Gazi University, Faculty of Science, Department of Biology, 06500, Teknikokullar, Ankara, Turkey
| | - Belma Aslim
- Gazi University, Faculty of Science, Department of Biology, 06500, Teknikokullar, Ankara, Turkey
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Balakrishnan R, Kim YS, Kim GW, Kim WJ, Hong SM, Kim CG, Choi DK. Standardized extract of Glehnia Littoralis abrogates memory impairment and neuroinflammation by regulation of CREB/BDNF and NF-κB/MAPK signaling in scopolamine-induced amnesic mice model. Biomed Pharmacother 2023; 165:115106. [PMID: 37421783 DOI: 10.1016/j.biopha.2023.115106] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/26/2023] [Accepted: 06/28/2023] [Indexed: 07/10/2023] Open
Abstract
Mild cognitive impairment is a typical symptom of early Alzheimer's disease (AD). Glehnia littoralis (G. littoralis), a medicinal halophyte plant commonly used to treat strokes, has been shown to possess some therapeutic qualities. In this study, we investigated the neuroprotective and anti-neuroinflammatory effects of a 50% ethanol extract of G. littoralis (GLE) on lipopolysccharide (LPS)-stimulated BV-2 cells and scopolamine-induced amnesic mice. In the in vitro study, GLE treatment (100, 200, and 400 µg/mL) markedly attenuated the translocation of NF-κB to the nucleus concomitantly with the significant mitigation of the LPS-induced production of inflammatory mediators, including NO, iNOS, COX-2, IL-6, and TNF-α. In addition, the GLE treatment suppressed the phosphorylation of MAPK signaling in the LPS-stimulated BV-2 cells. In the in vivo study, mice were orally administered with the GLE (50, 100, and 200 mg/kg) for 14 days, and cognitive loss was induced via the intraperitoneal injection of scopolamine (1 mg/kg) from 8 to 14 days. We found that GLE treatment ameliorated memory impairment and simultaneously improved memory function in the scopolamine-induced amnesic mice. Correspondingly, GLE treatment significantly decreased the AChE level and upregulated the protein expression of neuroprotective markers, such as BDNF and CREB, as well as Nrf2/HO-1 and decreased the levels of iNOS and COX-2 in the hippocampus and cortex. Furthermore, GLE treatment attenuated the increased phosphorylation of NF-κB/MAPK signaling in the hippocampus and cortex. These results suggest that GLE has a potential neuroprotective activity that may ameliorate learning and memory impairment by regulating AChE activity, promoting CREB/BDNF signaling, and inhibiting NF-κB/MAPK signaling and neuroinflammation.
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Affiliation(s)
- Rengasamy Balakrishnan
- BK21 FOUR GLOCAL Education Program of Nutraceuticals Development, Konkuk University, Chungju 27478, Republic of Korea; Department of Biotechnology, College of Biomedical and Health Science, Research Institute of Inflammatory Disease (RID), Konkuk University, Chungju 27478, Republic of Korea
| | - Yon-Suk Kim
- Department of Biotechnology, College of Biomedical and Health Science, Research Institute of Inflammatory Disease (RID), Konkuk University, Chungju 27478, Republic of Korea
| | - Ga-Won Kim
- Department of Applied Life Sciences, Graduate School, Konkuk University, Chungju 27478, Republic of Korea
| | - Woo-Jung Kim
- Biocenter, Gyeonggido Business and Science Accelerator, Gwanggyo-ro 147, Yeongtong-gu, Suwon 16229, Republic of Korea
| | - Sun-Mee Hong
- Department of Technology Development, Marine Industry Research Institute for East Sea Rim, Uljin-gun, Gyeongsangbuk-do 36315, Republic of Korea
| | - Choong-Gon Kim
- Marine Ecosystem Research Center, Korea Institute of Ocean Science and Technology, 385 Haeyang-ro, Yeongdo-gu, Busan 49111, Republic of Korea
| | - Dong-Kug Choi
- BK21 FOUR GLOCAL Education Program of Nutraceuticals Development, Konkuk University, Chungju 27478, Republic of Korea; Department of Biotechnology, College of Biomedical and Health Science, Research Institute of Inflammatory Disease (RID), Konkuk University, Chungju 27478, Republic of Korea; Department of Applied Life Sciences, Graduate School, Konkuk University, Chungju 27478, Republic of Korea.
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Wang M, Zhang XM, Fu X, Zhang P, Hu WJ, Yang BY, Kuang HX. Alkaloids in genus stephania (Menispermaceae): A comprehensive review of its ethnopharmacology, phytochemistry, pharmacology and toxicology. JOURNAL OF ETHNOPHARMACOLOGY 2022; 293:115248. [PMID: 35430287 DOI: 10.1016/j.jep.2022.115248] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/17/2022] [Accepted: 03/28/2022] [Indexed: 06/14/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Approximately 60 species of the genus Stephania (Menispermaceae) are distributed worldwide. Among these, 39 species are located in South and Southwest China; in particular, these plants are rich in alkaloids and were used in traditional Chinese medicine (TCM) against numerous ailments. AIM OF THIS REVIEW The purpose of this study was to provide organized information on the ethnopharmacological uses as well as the phytochemical, pharmacological, and toxicological evaluation of the alkaloids derived from plant species included in the genus Stephania. In addition, we aimed to provide comprehensive basic knowledge on the medicinal properties of these plants and establish meaningful guidelines for further research. MATERIALS AND METHODS Information related to the Stephania genus was collected from scientific databases, such as Web of Science, PubMed, Baidu Scholar, and China Academic Journals (CNKI), within the last 20 years on phytochemistry, pharmacology, and toxicology of the plants in genus Stephania. Furthermore, information was obtained from the Pharmacopoeia of the People's Republic of China. Chinese Pharmacopoeia and Flora of China. RESULTS Plant species belonging to the genus Stephania have been mentioned as traditional remedies and various alkaloidal compounds have been identified and isolated, including aporphine, proaporphine, morphinane, hasubanane, protoberberine, benzylisoquinoline, and bisbenzylisoquinoline and among others. The isolated alkaloidal compounds reportedly exhibited promising pharmacological properties, such as antimicrobial, antiviral, antitumor, antioxidant, antihyperglycemic, anti-inflammatory, antinociceptive, anti-multidrug resistance, neuroprotective, and cardioprotective activities. CONCLUSIONS The genus Stephania is widely used in TCM. The ethnopharmacological uses, phytochemistry, and pharmacology of the Stephania sp. Described in this review demonstrated that these plants contain numerous alkaloids and active constituents and display myriad pharmacological activities. Typically, research on the plants' pharmacological activity focuses on parts of the plants and the associated compounds. However, many Stephania species have rarely been studied, and the ethnomedicinal potential of those discovered has not been scientifically evaluated and needs to be further elucidated. Furthermore, quality control and toxicology studies are warranted in the future.
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Affiliation(s)
- Meng Wang
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Heilongjiang University of Chinese Medicine, Harbin, 150040, China.
| | - Xian-Mei Zhang
- Key Laboratory of Generic Manufacture Technology of Chinese Traditional Medicine, Lunan Pharmaceutical Group Co., Ltd., Linyi, 276006, China.
| | - Xin Fu
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Heilongjiang University of Chinese Medicine, Harbin, 150040, China.
| | - Peng Zhang
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Heilongjiang University of Chinese Medicine, Harbin, 150040, China.
| | - Wen-Jing Hu
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Heilongjiang University of Chinese Medicine, Harbin, 150040, China.
| | - Bing-You Yang
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Heilongjiang University of Chinese Medicine, Harbin, 150040, China.
| | - Hai-Xue Kuang
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Heilongjiang University of Chinese Medicine, Harbin, 150040, China.
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Li P, Xu Y, Cao Y, Ding Z. Polypeptides Isolated from Lactococcus lactis Alleviates Lipopolysaccharide (LPS)-Induced Inflammation in Ctenopharyngodon idella. Int J Mol Sci 2022; 23:ijms23126733. [PMID: 35743169 PMCID: PMC9224536 DOI: 10.3390/ijms23126733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/22/2022] [Accepted: 06/07/2022] [Indexed: 02/05/2023] Open
Abstract
The main purpose of the present study was to evaluate the anti-inflammatory activity of Lactococcus lactis BL52 and isolate active substances responsible for anti-inflammatory activity. Head-kidney (HK) macrophages were used for in vitro bioassay-guided isolation, and the structure of the two peptides was identified by mass spectrometry analysis. Lipopolysaccharide (LPS)-induced inflammatory responses in Ctenopharyngodon idella were also examined to evaluate the in vivo anti-inflammatory activity of active substances. Two active peptides were isolated by HPLC from L. lactis BL52, and an in vitro anti-inflammatory assay demonstrated that peptide ALBL1 and ALBL2 dose-dependently inhibited LPS-induced inflammatory cytokines TNF-α, IL-6, and IL-1β and inflammatory factors NO and PGE 2 production in macrophages (p < 0.05). After being treated with 20 mg/Kg peptide ALBL1 and ALBL2, the expression levels of TNF-α, IL-6, IL-1β, NO, and PGE 2 were significantly inhibited (p < 0.05). Results from the in vivo test showed that when the concentration of peptide ALBL1 and ALBL2 reached 30 mg/Kg, the LPS-induced upregulations of TNF-α, IL-6, IL-1β, NO, and PGE 2 were prevented. In addition, peptide ALBL1 and ALBL2 blocked the expression of Toll-like receptor 2 (TLR2) and then suppressed the phosphorylation of nuclear transcription factor-kappa B (NF-κB) p65 and degradation inhibitor of IκBα. Moreover, C. idella treated with peptide ALBL1 and ALBL2 can relieve pathological inflammatory responses caused by LPS. These results suggest that the anti-inflammatory properties of peptide ALBL1 and ALBL2 might be a result from the inhibition of IL-6, IL-1β, and TNF-α expressions through the downregulation of Toll2/NF-κB signaling pathways.
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Affiliation(s)
- Pei Li
- College of Life Science and Technology, Guangxi University, Nanning 530004, China;
- Institute for Fishery Sciences, Guangxi University, Nanning 530004, China
- Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524000, China;
| | - Youqing Xu
- Institute for Fishery Sciences, Guangxi University, Nanning 530004, China
- Correspondence: or (Y.X.); or (Z.D.)
| | - Yupo Cao
- Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524000, China;
| | - Zhaokun Ding
- Institute for Fishery Sciences, Guangxi University, Nanning 530004, China
- Correspondence: or (Y.X.); or (Z.D.)
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Kamyab R, Namdar H, Torbati M, Ghojazadeh M, Araj-Khodaei M, Fazljou SMB. Medicinal Plants in the Treatment of Hypertension: A Review. Adv Pharm Bull 2021; 11:601-617. [PMID: 34888207 PMCID: PMC8642800 DOI: 10.34172/apb.2021.090] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 10/28/2020] [Accepted: 11/01/2020] [Indexed: 11/09/2022] Open
Abstract
Traditional medicine is a comprehensive term for ancient, culture-bound health care practices that existed before the use of science in health matters and has been used for centuries. Medicinal plants are used to treat patients with cardiovascular diseases, which may occur due to ailments of the heart and blood vessels and comprise heart attacks, cerebrovascular diseases, hypertension, and heart failure. Hypertension causes difficulty in the functioning of the heart and is involved in atherosclerosis, raising the risk of heart attack and stroke. Many drugs are available for managing these diseases, though common antihypertensive drugs are generally accompanied by many side effects. Medicinal herbs have several active substances with pharmacological and prophylactic properties that can be used in the treatment of hypertension. This review presents an overview of some medicinal plants that have been shown to have hypotensive or antihypertensive properties.
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Affiliation(s)
- Raha Kamyab
- Department of Persian Medicine, Faculty of Traditional Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hossein Namdar
- Cardiovascular Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammadali Torbati
- Department of Food Science and Technology, Faculty of Nutrition, Tabriz University of Medical Science, Tabriz, Iran
| | - Morteza Ghojazadeh
- Research Center for Evidence Based Medicine (RCEBM), Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mostafa Araj-Khodaei
- Department of Persian Medicine, Faculty of Traditional Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Physical Medicine and Rehabilitation Research Center, Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
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Jia Y, Zhang D, Yin H, Li H, Du J, Bao H. Ganoderic Acid A Attenuates LPS-Induced Neuroinflammation in BV2 Microglia by Activating Farnesoid X Receptor. Neurochem Res 2021; 46:1725-1736. [PMID: 33821438 PMCID: PMC8187184 DOI: 10.1007/s11064-021-03303-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 02/21/2021] [Accepted: 03/17/2021] [Indexed: 01/03/2023]
Abstract
Neuroinflammation plays an important role in the onset and progression of neurodegenerative diseases. Microglia-mediated neuroinflammation have been proved to be the main reason for causing the neurodegenerative diseases. Ganoderic acid A (GAA), isolated from Ganoderma lucidum, showed anti-inflammatory effect in metabolism diseases. However, little research has been focused on the effect of GAA in neuroinflammation and the related mechanism. In the present study, lipopolysaccharide(LPS)-stimulated BV2 microglial cells were used to evaluate the anti-inflammatory capacity of GAA. Our data showed that GAA significantly suppressed LPS-induced BV2 microglial cells proliferation and activation in vitro. More strikingly, GAA promoted the conversion of BV2 microglial cells from M1 status induced by LPS to M2 status. Furthermore, GAA inhibited the pro-inflammatory cytokines release and promoted neurotrophic factor BDNF expression in LPS-induced BV2 microglial cells. Finally, we found that the expression of farnesoid-X-receptor (FXR) was prominently downregulated in LPS-stimulated BV2 microglial cells, antagonism of FXR with z-gugglesterone and FXR siRNA can reverse the effect of GAA in LPS-induced BV2 microglial cells. Taking together, our findings demonstrate that GAA can significantly inhibit LPS-induced neuroinflammation in BV2 microglial cells via activating FXR receptor.
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Affiliation(s)
- Yue Jia
- School of Medicine, Yunnan University, 2 Cuihu North Road, Kunming, 650091, Yunnan, People's Republic of China
| | - Dandan Zhang
- School of Medicine, Yunnan University, 2 Cuihu North Road, Kunming, 650091, Yunnan, People's Republic of China
| | - Hua Yin
- Yunnan Key Laboratory of Molecular Biology of Chinese Medicine, Yunnan University of Traditional Chinese Medicine, Kunming, 650500, Yunnan, People's Republic of China
| | - Haoran Li
- School of Medicine, Yunnan University, 2 Cuihu North Road, Kunming, 650091, Yunnan, People's Republic of China
| | - Jing Du
- School of Medicine, Yunnan University, 2 Cuihu North Road, Kunming, 650091, Yunnan, People's Republic of China.
- The National Clinical Research Center for Mental Disorders and Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, 100088, People's Republic of China.
- Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, 100088, People's Republic of China.
| | - Hongkun Bao
- School of Medicine, Yunnan University, 2 Cuihu North Road, Kunming, 650091, Yunnan, People's Republic of China.
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Yazdankhah M, Shang P, Ghosh S, Hose S, Liu H, Weiss J, Fitting CS, Bhutto IA, Zigler JS, Qian J, Sahel JA, Sinha D, Stepicheva NA. Role of glia in optic nerve. Prog Retin Eye Res 2020; 81:100886. [PMID: 32771538 DOI: 10.1016/j.preteyeres.2020.100886] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 07/09/2020] [Accepted: 07/20/2020] [Indexed: 12/13/2022]
Abstract
Glial cells are critically important for maintenance of neuronal activity in the central nervous system (CNS), including the optic nerve (ON). However, the ON has several unique characteristics, such as an extremely high myelination level of retinal ganglion cell (RGC) axons throughout the length of the nerve (with virtually all fibers myelinated by 7 months of age in humans), lack of synapses and very narrow geometry. Moreover, the optic nerve head (ONH) - a region where the RGC axons exit the eye - represents an interesting area that is morphologically distinct in different species. In many cases of multiple sclerosis (demyelinating disease of the CNS) vision problems are the first manifestation of the disease, suggesting that RGCs and/or glia in the ON are more sensitive to pathological conditions than cells in other parts of the CNS. Here, we summarize current knowledge on glial organization and function in the ON, focusing on glial support of RGCs. We cover both well-established concepts on the important role of glial cells in ON health and new findings, including novel insights into mechanisms of remyelination, microglia/NG2 cell-cell interaction, astrocyte reactivity and the regulation of reactive astrogliosis by mitochondrial fragmentation in microglia.
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Affiliation(s)
- Meysam Yazdankhah
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Peng Shang
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Sayan Ghosh
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Stacey Hose
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Haitao Liu
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Joseph Weiss
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Christopher S Fitting
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Imran A Bhutto
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - J Samuel Zigler
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Jiang Qian
- Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - José-Alain Sahel
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Institut de la Vision, INSERM, CNRS, Sorbonne Université, F-75012, Paris, France
| | - Debasish Sinha
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| | - Nadezda A Stepicheva
- Department of Ophthalmology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
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Ismail EN, Jantan I, Vidyadaran S, Jamal JA, Azmi N. Phyllanthus amarus prevents LPS-mediated BV2 microglial activation via MyD88 and NF-κB signaling pathways. BMC Complement Med Ther 2020; 20:202. [PMID: 32611404 PMCID: PMC7330992 DOI: 10.1186/s12906-020-02961-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 05/19/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Phyllanthus amarus has been shown to attenuate lipopolysaccharide (LPS)-induced peripheral inflammation but similar studies in the central nervous system are scarce. The aim of the present study was to investigate the neuroprotective effects of 80% ethanol extract of P. amarus (EPA) in LPS-activated BV2 microglial cells. METHODS BV2 microglial cells c for 24 h, pre-treated with EPA for 24 h prior to LPS induction for another 24 h. Surface expression of CD11b and CD40 on BV2 cells was analyzed by flow cytometry. ELISA was employed to measure the production of pro-inflammatory mediators i.e. nitric oxide (NO) and tumor necrosis factor (TNF)-α. Western blotting technique was used to determine the expression of inducible nitric oxide synthase (iNOS), myeloid differentiation protein 88 (MYD88), nuclear factor kappa B (NF-κB), caspase-1, and mitogen activated protein kinase (MAPK). RESULTS Qualitative and quantitative analyses of the EPA using a validated ultra-high pressure liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) method indicated the presence of phyllanthin, hypophyllanthin, niranthin, ellagic acid, corilagin, gallic acid, phyltetralin, isolintetralin and geraniin. EPA suppressed the production of NO and TNFα in LPS-activated BV2 microglial cells. Moreover, EPA attenuated the expression of MyD88, NF-κB and MAPK (p-P38, p-JNK and p-ERK1/2). It also inhibited the expression of CD11b and CD40. EPA protected against LPS-induced microglial activation via MyD88 and NF-κB signaling in BV2 microglial cells. CONCLUSIONS EPA demonstrated neuroprotective effects against LPS-induced microglial cells activation through the inhibition of TNFα secretion, iNOS protein expression and subsequent NO production, inhibition of NF-κB and MAPKs mediated by adapter protein MyD88 and inhibition of microglial activation markers CD11b and CD40.
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Affiliation(s)
- Elysha Nur Ismail
- Drug and Herbal Research Centre, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300, Kuala Lumpur, Malaysia.,Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Ibrahim Jantan
- School of Pharmacy, Faculty of Health and Medical Sciences, Taylor's University, Lakeside Campus, Jalan Taylor's, 47500, Subang Jaya, Selangor, Malaysia
| | - Sharmili Vidyadaran
- Immunology Laboratory, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Jamia Azdina Jamal
- Drug and Herbal Research Centre, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300, Kuala Lumpur, Malaysia
| | - Norazrina Azmi
- Drug and Herbal Research Centre, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300, Kuala Lumpur, Malaysia.
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Anticancer Activity of Tetrandrine by Inducing Apoptosis in Human Breast Cancer Cell Line MDA-MB-231 In Vivo. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:6823520. [PMID: 32714412 PMCID: PMC7345956 DOI: 10.1155/2020/6823520] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 06/15/2020] [Indexed: 01/02/2023]
Abstract
Tetrandrine (TET) is an alkaloid extracted from a traditional Chinese medicinal plant. It exerts remarkable anticancer activity and induces apoptotic cell death in various human cancer cells. The present study aimed to investigate the effects of TET on the inhibition of tumor growth and the induction of apoptosis in MDA-MB-231 breast cancer in xenograft mice. Tumor weight and volume were measured. The histopathological changes in the tumor tissue were observed. Immunohistochemistry analysis of Bcl-2-associated X protein (Bax) and B-cell lymphoma/leukemia-2 (Bcl-2) was carried out. The expression of apoptosis-associated genes and proteins, such as cysteine aspartic acid-specific protease-3 (Caspase-3), Survivin, Bax, Bcl-2, BH3-interacting domain death agonist (Bid), and poly ADP-ribose polymerase (PARP), was measured by reverse transcription-polymerase chain reaction (RT-PCR) and Western blotting, respectively. TET inhibited tumor growth and induced apoptosis in TNBC cell line MDA-MB-231. The mechanism underlying this effect might be mediated by TET-upregulated Caspase-3, Bax, and Bid and downregulated by Bcl-2, Survivin, and PARP. Taken together, this study supported the fact that TET is a promising therapeutic agent for the treatment of TNBC, thereby providing experimental evidence for its use in the treatment of breast cancer.
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Berköz M, Krośniak M, Özkan-Yılmaz F, Özlüer-Hunt A. Prophylactic effect of Biochanin A in lipopolysaccharide-stimulated BV2 microglial cells. Immunopharmacol Immunotoxicol 2020; 42:330-339. [PMID: 32482108 DOI: 10.1080/08923973.2020.1769128] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Aim/Purpose of the study:Inhibition of microglial activation using phytochemicals may be a potential candidate for the prevention of neurodegenerative diseases caused by neuroinflammation and oxidative stress. The goal of this study was to investigate the protective role of Biochanin A on lipopolysaccharide (LPS)-stimulated BV2 microglial cells. BV2 microglial cells were treated with LPS in the presence and absence of Biochanin A. Materials and methods: For this aim, nitric oxide production, nuclear factor kappa B (NF-κB), tumor necrosis factor alpha (TNF-α), interleukin-1 beta (IL-1β), IL-6, Prostaglandin E2 (PGE2), and reactive oxygen species (ROS) levels, inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), myeloid differentiation factor-88 (MyD88), and toll like receptor-4 (TLR-4) protein expressions, Akt and ERK1/2 phosphorylation levels were measured. Results:Biochanin A pretreatment resulted in significant and concentration-dependently reduced the LPS-induced production of nitric oxide, NF-κB p65, TNF-α, IL-1β, IL-6, PGE2, and ROS compared to the untreated group. Biochanin A prophylaxis exerted an anti-inflammatory effect by suppressing iNOS, COX-2, MyD88, and TLR-4 protein expressions and Akt and ERK1/2 pathway activation. Conclusion:Taken together, these results show that Biochanin A exerts antioxidant and anti-inflammatory activities, thus may be beneficial for preventing neurodegenerative diseases mediated by microglial cells.
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Affiliation(s)
- Mehmet Berköz
- Department of Biochemistry, Faculty of Pharmacy, Van Yuzuncu Yil University, Van, Turkey
| | - Mirosław Krośniak
- Department of Food Chemistry and Nutrition, Medical College, Jagiellonian University, Cracow, Poland
| | - Ferbal Özkan-Yılmaz
- Department of Basic Sciences, Faculty of Fisheries, Mersin University, Mersin, Turkey
| | - Arzu Özlüer-Hunt
- Department of Aquaculture, Faculty of Fisheries, Mersin University, Mersin, Turkey
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11
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Retraction: Tetrandrine Suppresses Lipopolysaccharide-Induced Microglial Activation by Inhibiting NF-κB and ERK Signaling Pathways in BV2 Cells. PLoS One 2019; 14:e0224894. [PMID: 31671159 PMCID: PMC6822702 DOI: 10.1371/journal.pone.0224894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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12
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Li P, Ye J, Zeng S, Yang C. Florfenicol alleviated lipopolysaccharide (LPS)-induced inflammatory responses in Ctenopharyngodon idella through inhibiting toll / NF-κB signaling pathways. FISH & SHELLFISH IMMUNOLOGY 2019; 94:479-484. [PMID: 31472264 DOI: 10.1016/j.fsi.2019.08.073] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/25/2019] [Accepted: 08/27/2019] [Indexed: 06/10/2023]
Abstract
The present study was conducted to evaluate the anti-inflammatory activity of florfenicol (FFC) against lipopolysaccharide (LPS)-induced inflammatory responses in Ctenopharyngodon idella in vivo and in vitro. Head-kidney (HK) macrophages were pre-treated with 10 μg/mL LPS and then exposed to different concentrations of FFC to determine its in vitro anti-inflammatory activity. Inhibitory effect of FFC on inflammatory mediators TNF-α, IL-6 and IL-1β, as well as LPS-induced nitric oxide (NO) and prostaglandin E 2 (PGE 2) production were assayed by ELISA. The expression level of nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) were investigated by RT-PCR. Expression level of TLR-related genes (TLR1, TLR2, TLR4, TLR7, TLR8) expression, tumor necrosis factor receptor-associated factor 6 (TRAF6), transforming growth factor-b-activated kinase 1 (TAK1), Myeloid differentiation factor 88 (MyD88), nucleus p65, NF-κBα (IκBα) were measured by RT-PCR after grass carp were treated with 50, 100 and 200 mg FFC/kg body weight for 3 days. Results from in vitro tests demonstrated that FFC dose-dependently inhibited LPS-induced inflammatory cytokines TNF-α, IL-6 and IL-1β, inflammatory factors NO and PGE 2 production in macrophages. In addition, iNOS and COX-2 expression levels decreased significantly as compared with LPS treated group. In vivo test demonstrated that treatment with FFC prevented the LPS-induced upregulation of TNF-α, IL-6, IL-1β, NO and PGE 2. The expression level of iNOS, and COX-2 in FFC-treated grass carp were also downregulated as compared with LPS treated fish. Besides, FFC blocked the expression of Toll-like receptor 2 (TLR2) and then suppressed the phosphorylation of nuclear transcription factor-kappa B (NF-κB) p65 and degradation inhibitor of IκBα. Furthermore, administration of FFC inhibited the up-regulation of IRAK4, TRAF6 and TAK1 induced by LPS. These results suggest that the anti-inflammatory properties of FFC might be the results from the inhibition of iNOS, COX-2, IL-6, IL-1β, and TNF-α expressions through the down-regulation of Toll/NF-κB signaling pathways.
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Affiliation(s)
- Pei Li
- Center for Food Quality Supervision and Testing (Zhanjiang)Ministry of Agriculture and Rural Affairs PR China, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, 52400, China; Institute for Fisheries Sciences, Guangxi University, Nanning, 53000, China
| | - Jianzhi Ye
- Center for Food Quality Supervision and Testing (Zhanjiang)Ministry of Agriculture and Rural Affairs PR China, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, 52400, China
| | - Shaodong Zeng
- Center for Food Quality Supervision and Testing (Zhanjiang)Ministry of Agriculture and Rural Affairs PR China, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, 52400, China
| | - Chunliang Yang
- Center for Food Quality Supervision and Testing (Zhanjiang)Ministry of Agriculture and Rural Affairs PR China, Agricultural Products Processing Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, 52400, China.
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13
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Akhtar-Schäfer I, Wang L, Krohne TU, Xu H, Langmann T. Modulation of three key innate immune pathways for the most common retinal degenerative diseases. EMBO Mol Med 2019; 10:emmm.201708259. [PMID: 30224384 PMCID: PMC6180304 DOI: 10.15252/emmm.201708259] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
This review highlights the role of three key immune pathways in the pathophysiology of major retinal degenerative diseases including diabetic retinopathy, age‐related macular degeneration, and rare retinal dystrophies. We first discuss the mechanisms how loss of retinal homeostasis evokes an unbalanced retinal immune reaction involving responses of local microglia and recruited macrophages, activity of the alternative complement system, and inflammasome assembly in the retinal pigment epithelium. Presenting these key mechanisms as complementary targets, we specifically emphasize the concept of immunomodulation as potential treatment strategy to prevent or delay vision loss. Promising molecules are ligands for phagocyte receptors, specific inhibitors of complement activation products, and inflammasome inhibitors. We comprehensively summarize the scientific evidence for this strategy from preclinical animal models, human ocular tissue analyses, and clinical trials evolving in the last few years.
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Affiliation(s)
- Isha Akhtar-Schäfer
- Laboratory for Experimental Immunology of the Eye, Department of Ophthalmology, University of Cologne, Cologne, Germany
| | - Luping Wang
- Department of Ophthalmology, University of Bonn, Bonn, Germany
| | - Tim U Krohne
- Department of Ophthalmology, University of Bonn, Bonn, Germany
| | - Heping Xu
- Centre for Experimental Medicine, The Wellcome-Wolfson Institute for Experimental Medicine, School of Medicine, Dentistry & Biomedical Sciences, Queen's University Belfast, Belfast, UK
| | - Thomas Langmann
- Laboratory for Experimental Immunology of the Eye, Department of Ophthalmology, University of Cologne, Cologne, Germany .,Center for Molecular Medicine, University of Cologne, Cologne, Germany
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14
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Cascade Signals of Papaverine Inhibiting LPS-Induced Retinal Microglial Activation. J Mol Neurosci 2019; 68:111-119. [PMID: 30852743 PMCID: PMC6453874 DOI: 10.1007/s12031-019-01289-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Accepted: 02/28/2019] [Indexed: 02/04/2023]
Abstract
Studies have shown that papaverine can inhibit lipopolysaccharide (LPS)-induced microglial activation. The retinal primary microglia of newborn SD rats were isolated and purified, and a LPS-induced microglia activation model was established. The protein phosphorylation level of the signaling pathway was detected by western blotting. The transcription and expression of TNF-α, IL-1β, and IL-10 were respectively detected by RT-PCR and ELISA to observe the abnormal activation of primary microglia. The cAMP inhibitor Rp-isomer, PKA inhibitor H89, and MEK inhibitor U0126 were separately added to further investigate the role of MEK/Erk in PAP inhibition of primary microglial activation and the relationship between cAMP/PKA and MEK/Erk. It was found that the level of MEK phosphorylation was upregulated after LPS stimulation, which was blocked by 10 μg/ml of papaverine.10μM U0126 significantly inhibited TNF-α and IL-1β and increased IL-10 transcription and expression in retinal microglia (P < 0.01). Both Rp-isomer and H89 upregulated the phosphorylation levels of MEK and Erk. Papaverine may inhibit inflammatory factors and promote the expression of anti-inflammatory factors through the cAMP/PKA and MEK/Erk pathway, thereby inhibiting LPS-induced activation of primary retinal microglia, and the MEK/Erk pathway may be partially regulated by cAMP/PKA, which can provide theoretical basis and experimental basis for its protection of the central nervous system.
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15
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Cheng Y, Chang C, Chang T, Li H, Hung H, Liu G, Lin C. Aβ stimulates microglial activation through antizyme‐dependent downregulation of ornithine decarboxylase. J Cell Physiol 2018; 234:9733-9745. [DOI: 10.1002/jcp.27659] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 10/02/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Yu‐Wen Cheng
- Department of Internal Medicine Yuanli Lee's General Hospital, Lee's Medical Corporation Miaoli Taiwan
| | - Chun‐Cheng Chang
- Department of Internal Medicine Dajia Lee's General Hospital, Lee's Medical Corporation Taichung Taiwan
| | - Ti‐Sheng Chang
- Department of Internal Medicine Dajia Lee's General Hospital, Lee's Medical Corporation Taichung Taiwan
| | - Hsin‐Hua Li
- Institute of Medicine, College of Medicine, Chung Shan Medical University Taichung Taiwan
| | - Hui‐Chih Hung
- Department of Life Sciences and Institute of Genomics and Bioinformatics National Chung Hsing University Taichung Taiwan
| | - Guang‐Yaw Liu
- Institute of Biochemistry, Microbiology and Immunology, College of Medicine, Chung Shan Medical University Taichung Taiwan
| | - Chih‐Li Lin
- Institute of Medicine, College of Medicine, Chung Shan Medical University Taichung Taiwan
- Department of Medical Research Chung Shan Medical University Hospital Taichung Taiwan
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16
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Lee JY, Nam JH, Nam Y, Nam HY, Yoon G, Ko E, Kim SB, Bautista MR, Capule CC, Koyanagi T, Leriche G, Choi HG, Yang J, Kim J, Hoe HS. The small molecule CA140 inhibits the neuroinflammatory response in wild-type mice and a mouse model of AD. J Neuroinflammation 2018; 15:286. [PMID: 30309372 PMCID: PMC6182807 DOI: 10.1186/s12974-018-1321-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 09/19/2018] [Indexed: 12/23/2022] Open
Abstract
Background Neuroinflammation is associated with neurodegenerative diseases, including Alzheimer’s disease (AD). Thus, modulating the neuroinflammatory response represents a potential therapeutic strategy for treating neurodegenerative diseases. Several recent studies have shown that dopamine (DA) and its receptors are expressed in immune cells and are involved in the neuroinflammatory response. Thus, we recently developed and synthesized a non-self-polymerizing analog of DA (CA140) and examined the effect of CA140 on neuroinflammation. Methods To determine the effects of CA140 on the neuroinflammatory response, BV2 microglial cells were pretreated with lipopolysaccharide (LPS, 1 μg/mL), followed by treatment with CA140 (10 μM) and analysis by reverse transcription-polymerase chain reaction (RT-PCR). To examine whether CA140 alters the neuroinflammatory response in vivo, wild-type mice were injected with both LPS (10 mg/kg, intraperitoneally (i.p.)) and CA140 (30 mg/kg, i.p.), and immunohistochemistry was performed. In addition, familial AD (5xFAD) mice were injected with CA140 or vehicle daily for 2 weeks and examined for microglial and astrocyte activation. Results Pre- or post-treatment with CA140 differentially regulated proinflammatory responses in LPS-stimulated microglia and astrocytes. Interestingly, CA140 regulated D1R levels to alter LPS-induced proinflammatory responses. CA140 significantly downregulated LPS-induced phosphorylation of ERK and STAT3 in BV2 microglia cells. In addition, CA140-injected wild-type mice exhibited significantly decreased LPS-induced microglial and astrocyte activation. Moreover, CA140-injected 5xFAD mice exhibited significantly reduced microglial and astrocyte activation. Conclusions CA140 may be beneficial for preventing and treating neuroinflammatory-related diseases, including AD. Electronic supplementary material The online version of this article (10.1186/s12974-018-1321-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ju-Young Lee
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), 61 Cheomdan-ro, Dong-gu, Daegu, 41068, South Korea
| | - Jin Han Nam
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), 61 Cheomdan-ro, Dong-gu, Daegu, 41068, South Korea
| | - Youngpyo Nam
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), 61 Cheomdan-ro, Dong-gu, Daegu, 41068, South Korea
| | - Hye Yeon Nam
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), 61 Cheomdan-ro, Dong-gu, Daegu, 41068, South Korea
| | - Gwangho Yoon
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), 61 Cheomdan-ro, Dong-gu, Daegu, 41068, South Korea
| | - Eunhwa Ko
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80 Cheombok-ro, Dong-gu, Daegu, 41061, South Korea
| | - Sang-Bum Kim
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80 Cheombok-ro, Dong-gu, Daegu, 41061, South Korea
| | - Mahealani R Bautista
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| | - Christina C Capule
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| | - Takaoki Koyanagi
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| | - Geoffray Leriche
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| | - Hwan Geun Choi
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80 Cheombok-ro, Dong-gu, Daegu, 41061, South Korea
| | - Jerry Yang
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| | - Jeongyeon Kim
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), 61 Cheomdan-ro, Dong-gu, Daegu, 41068, South Korea.
| | - Hyang-Sook Hoe
- Department of Neural Development and Disease, Korea Brain Research Institute (KBRI), 61 Cheomdan-ro, Dong-gu, Daegu, 41068, South Korea.
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Lee JY, Joo B, Nam JH, Nam HY, Lee W, Nam Y, Seo Y, Kang HJ, Cho HJ, Jang YP, Kim J, We YM, Koo JW, Hoe HS. An Aqueous Extract of Herbal Medicine ALWPs Enhances Cognitive Performance and Inhibits LPS-Induced Neuroinflammation via FAK/NF-κB Signaling Pathways. Front Aging Neurosci 2018; 10:269. [PMID: 30319390 PMCID: PMC6168635 DOI: 10.3389/fnagi.2018.00269] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 08/22/2018] [Indexed: 12/11/2022] Open
Abstract
Recent studies have shown that Liuwei Dihuang pills (LWPs) can positively affect learning, memory and neurogenesis. However, the underlying molecular mechanisms are not understood. In the present study, we developed ALWPs, a mixture of Antler and LWPs, and investigated whether ALWPs can affect neuroinflammatory responses. We found that ALWPs (500 mg/ml) inhibited lipopolysaccharide (LPS)-induced proinflammatory cytokine IL-1β mRNA levels in BV2 microglial cells but not primary astrocytes. ALWPs significantly reduced LPS-induced cell-surface levels of TLR4 to alter neuroinflammation. An examination of the molecular mechanisms by which ALWPs regulate the LPS-induced proinflammatory response revealed that ALWPs significantly downregulated LPS-induced levels of FAK phosphorylation, suggesting that ALWPs modulate FAK signaling to alter LPS-induced IL-1β levels. In addition, treatment with ALWPs followed by LPS resulted in decreased levels of the transcription factor NF-κB in the nucleus compared with LPS alone. Moreover, ALWPs significantly suppressed LPS-induced BV2 microglial cell migration. To examine whether ALWPs modulate learning and memory in vivo, wild-type C57BL/6J mice were orally administered ALWPs (200 mg/kg) or PBS daily for 3 days, intraperitoneally injected (i.p.) with LPS (250 μg/kg) or PBS, and assessed in Y maze and NOR tests. We observed that oral administration of ALWPs to LPS-injected wild-type C57BL/6J mice significantly rescued short- and long-term memory. More importantly, oral administration of ALWPs to LPS-injected wild-type C57BL/6J mice significantly reduced microglial activation in the hippocampus and cortex. Taken together, our results suggest that ALWPs can suppress neuroinflammation-associated cognitive deficits and that ALWPs have potential as a drug for neuroinflammation/neurodegeneration-related diseases, including Alzheimer's disease (AD).
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Affiliation(s)
- Ju-Young Lee
- Department of Neural Development and Disease, Korea Brain Research Institute, Daegu, South Korea
| | - Bitna Joo
- Department of Neural Development and Disease, Korea Brain Research Institute, Daegu, South Korea
- Department of Brain and Cognitive Sciences, Daegu Gyeongbuk Institute of Science & Technology, Daegu, South Korea
| | - Jin Han Nam
- Department of Neural Development and Disease, Korea Brain Research Institute, Daegu, South Korea
| | - Hye Yeon Nam
- Department of Neural Development and Disease, Korea Brain Research Institute, Daegu, South Korea
| | - Wonil Lee
- Department of Neural Development and Disease, Korea Brain Research Institute, Daegu, South Korea
| | - Youngpyo Nam
- Department of Neural Development and Disease, Korea Brain Research Institute, Daegu, South Korea
| | - Yongtaek Seo
- Division of Pharmacology, College of Pharmacy, Kyung Hee University, Seoul, South Korea
| | - Hye-Jin Kang
- Department of Neural Development and Disease, Korea Brain Research Institute, Daegu, South Korea
| | - Hyun-Ji Cho
- Department of Neural Development and Disease, Korea Brain Research Institute, Daegu, South Korea
| | - Young Pyo Jang
- Division of Pharmacology, College of Pharmacy, Kyung Hee University, Seoul, South Korea
| | - Jeongyeon Kim
- Department of Neural Development and Disease, Korea Brain Research Institute, Daegu, South Korea
| | - Young-Man We
- College of Korean Medicine, Wonkwang University, Iksan, South Korea
- Oriental Medical Clinic Center, Hyoo Medical Clinic, Seoul, South Korea
| | - Ja Wook Koo
- Department of Neural Development and Disease, Korea Brain Research Institute, Daegu, South Korea
- Department of Brain and Cognitive Sciences, Daegu Gyeongbuk Institute of Science & Technology, Daegu, South Korea
| | - Hyang-Sook Hoe
- Department of Neural Development and Disease, Korea Brain Research Institute, Daegu, South Korea
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Liu J, Huang S, Lu F. Galectin-3 and Galectin-9 May Differently Regulate the Expressions of Microglial M1/M2 Markers and T Helper 1/Th2 Cytokines in the Brains of Genetically Susceptible C57BL/6 and Resistant BALB/c Mice Following Peroral Infection With Toxoplasma gondii. Front Immunol 2018; 9:1648. [PMID: 30108583 PMCID: PMC6080610 DOI: 10.3389/fimmu.2018.01648] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Accepted: 07/04/2018] [Indexed: 11/13/2022] Open
Abstract
Toxoplasmic encephalitis (TE), an opportunistic infection, is a severe health problem in immunocompromised patients. Previous studies have revealed that C57BL/6 mice are susceptible and BALB/c mice are resistant to TE. To investigate the mechanisms involved in the immunopathogenesis of TE in susceptible C57BL/6 and resistant BALB/c mice, both strains of mice were perorally infected with the Prugniuad (Pru) strain of Toxoplasma gondii. Our results showed that compared with BALB/c mice, C57BL/6 mice infected with T. gondii Pru strain had more severe brain histopathological damage, and higher mRNA expression levels of tachyzoite-specific surface antigen 1, bradyzoite-specific antigen 1, interferon gamma (IFNγ), interleukin (IL)-10, arginase1 (Arg1) (M2 marker), galectin (Gal)-3, Gal-9, T. gondii microneme protein 1 (TgMIC1), TgMIC4, and TgMIC6 during the course of infection by using quantitative real-time reverse transcription-polymerase chain reaction. Further analysis displayed that BALB/c mice showed higher numbers of microglial cells and higher levels of IL-1β, inducible nitric oxide synthase (iNOS) (M1 marker), and chitinase-3-like protein 3 (Ym1) (M2 marker) in the early infective stage [at day 14 or 35 post infection (p.i.)] compared with C57BL/6 mice, whereas C57BL/6 mice showed higher numbers of microglial cells and higher levels of IL-10, iNOS (M1 marker), and Ym1 (M2 marker) at days 35, 50, or 70 p.i. compared with BALB/c mice. Correlation analysis showed that significant positive correlations existed between Gal-3 and IL-4/IL-10/iNOS/Ym1 and between Gal-9 and IL-4/Ym1 in C57BL/6 mice; between Gal-3 and IFNγ/Arg1 and between Gal-9 and IFNγ/Arg1 in BALB/c mice. Together, our data demonstrated that different Gal-3 and Gal-9 expressions as well as different positive correlations were found between Gal-3 and T helper 1 (Th1)/Th2/M1/M2 cytokines or between Gal-9 and Th1/Th2/M2 cytokines in the brains of T. gondii Pru strain-infected C57BL/6 and BALB/c mice.
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Affiliation(s)
- Jinfeng Liu
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Disease Control of Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Shiguang Huang
- School of Stomatology, Jinan University, Guangzhou, China
| | - Fangli Lu
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Key Laboratory of Tropical Disease Control of Ministry of Education, Sun Yat-sen University, Guangzhou, China
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Fu L, Fung FK, Lo ACY, Chan YK, So KF, Wong IYH, Shih KC, Lai JSM. Transcorneal Electrical Stimulation Inhibits Retinal Microglial Activation and Enhances Retinal Ganglion Cell Survival After Acute Ocular Hypertensive Injury. Transl Vis Sci Technol 2018; 7:7. [PMID: 29862139 PMCID: PMC5976234 DOI: 10.1167/tvst.7.3.7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 04/08/2018] [Indexed: 12/27/2022] Open
Abstract
PURPOSE To investigate the effect of transcorneal electrical stimulation (TcES) on retinal ganglion cell (RGC) function and survival after acute ocular hypertension-related retinal injury in gerbil eyes. METHODS Gerbil eyes were subjected to acute ocular hypertensive injury (80 mm Hg for 60 minutes). In the treatment group, TcES was applied to the surgical eye immediately and then twice weekly for a total of 1 month. In the control group, sham TcES was given to the surgical eye at the same time points. Retinal function was assessed and compared between groups using flash electroretinography. For histological analysis, the number of RGC and microglial cells were counted by immunofluorescence staining after the gerbils were sacrificed on day 7 and day 28. Real-time polymerase chain reaction and western blot analysis were conducted to compare expression of interleukin (IL)-10, IL-6, COX-2, tumor necrosis factor (TNF)-α, and NF-κB phosphorylation among groups. RESULTS TcES-treated eyes had significantly higher RGC survival at 1 month compared to controls. This was associated with RGC function. Furthermore, TcES-treated eyes were shown to have increased IL-10 expression, with a corresponding reduction in IL-6 and COX-2 expression as well as reduction in NF-κB phosphorylation. This was associated with a suppression in microglial cell activation in TcES-treated eyes. CONCLUSIONS Early treatment with TcES in gerbils protected the RGC from secondary damage and preserved retinal function in acute ocular hypertensive injury through modulation of the microglial-cell activated local inflammatory response. TRANSLATIONAL RELEVANCE Our study strengthens the argument for translating TcES as a viable treatment in acute glaucoma.
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Affiliation(s)
- Lin Fu
- Affiliated Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang Province, People's Republic of China
- Department of Ophthalmology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR
| | - Frederic K. Fung
- Department of Ophthalmology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR
| | - Amy Cheuk-Yin Lo
- Department of Ophthalmology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR
| | - Yau-Kei Chan
- Department of Mechanical Engineering, Faculty of Engineering, University of Hong Kong, Hong Kong SAR
| | - Kwok-Fai So
- Department of Ophthalmology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR
| | - Ian Yat-Hin Wong
- Department of Ophthalmology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR
| | - Kendrick Co Shih
- Department of Ophthalmology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR
| | - Jimmy Shiu-Ming Lai
- Department of Ophthalmology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR
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20
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Zeng HL, Shi JM. The role of microglia in the progression of glaucomatous neurodegeneration- a review. Int J Ophthalmol 2018; 11:143-149. [PMID: 29376003 DOI: 10.18240/ijo.2018.01.22] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Accepted: 08/28/2017] [Indexed: 12/11/2022] Open
Abstract
Glaucoma is a serious leading cause of irreversible blindness worldwide. Reducing intraocular pressure (IOP) does not always stop glaucomatous neurodegeneration and the optic nerve may continue to be damaged in the normal IOP. Microglial activity has been recognized to play essential roles in pathogenesis of the central nervous system (CNS) as well as retinal ganglion cell (RGC) survival. The relationship between the neurodegeneration and the microglia cells in glaucoma is very complicated and still remains unclear. In the present review, we summarize the recent studies of mechanisms of microglia in glaucoma neurodegeneration, which might provide new ways to treat glaucoma.
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Affiliation(s)
- Hui-Lan Zeng
- Department of Ophthalmology, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province, China
| | - Jing-Ming Shi
- Department of Ophthalmology, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province, China
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21
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Nicolas S, Cazareth J, Zarif H, Guyon A, Heurteaux C, Chabry J, Petit-Paitel A. Globular Adiponectin Limits Microglia Pro-Inflammatory Phenotype through an AdipoR1/NF-κB Signaling Pathway. Front Cell Neurosci 2017; 11:352. [PMID: 29184485 PMCID: PMC5694456 DOI: 10.3389/fncel.2017.00352] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 10/24/2017] [Indexed: 12/14/2022] Open
Abstract
We recently reported that increased levels of Adiponectin (ApN) in the brain led to microglia phenotype and activation state regulation, thus reducing both global brain inflammation and depressive-like behaviors in mice. Apart from this, little is known on ApN molecular effects on microglia, although these cells are crucial in both physiological and pathological processes. Here we fill this gap by studying the effects and targets of ApN toward neuroinflammation. Our findings suggest that ApN deficiency in mice leads to a higher sensitivity of mice to neuroinflammation that is due to enhanced microglia responsiveness to a pro-inflammatory challenge. Moreover, we show that globular ApN (gApN) exerts direct in vivo anti-inflammatory actions on microglia by reducing IL-1β, IL-6, and TNFα synthesis. In vitro, gApN anti-inflammatory properties are confirmed in brain-sorted microglia, primary cultured and microglia cell line (BV2), but are not observed on astrocytes. Our results also show that gApN blocks LPS-induced nitrosative and oxidative stress in microglia. Finally, we demonstrate for the first time that these anti-inflammatory and anti-oxidant actions of gApN on microglia are mediated through an AdipoR1/NF-κB signaling pathway.
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Affiliation(s)
- Sarah Nicolas
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Julie Cazareth
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Hadi Zarif
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Alice Guyon
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Catherine Heurteaux
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Joëlle Chabry
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
| | - Agnès Petit-Paitel
- Centre Nationnal de la Recherche Scientifique, UMR7275 Institut de Pharmacologie Moléculaire et Cellulaire, Université Côte d'Azur, Valbonne, France
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22
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Chen QZ, Li Y, Shao Y, Zeng YH, Ren WY, Liu RX, Zhou LY, Hu XL, Huang M, He F, Sun WJ, Wu K, He BC. TGF-β1/PTEN/PI3K signaling plays a critical role in the anti-proliferation effect of tetrandrine in human colon cancer cells. Int J Oncol 2017; 50:1011-1021. [PMID: 28197642 DOI: 10.3892/ijo.2017.3875] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 01/31/2017] [Indexed: 12/17/2022] Open
Abstract
The diagnosis and treatment for colon cancer have been greatly developed, but the prognosis remains unsatisfactory. There is still a great clinical need to explore new efficacious drugs for colon cancer treatment. Tetrandrine (Tet) is a bis-benzylisoquinoline alkaloid. It has been shown that Tet may be a potential candidate for cancer treatment, but the explicit mechanism underlying this activity remains unclear. In this study, we investigated the anticancer activity of Tet in human colon cancer cells and dissected the possible mechanism. With cell viability assay and flow cytometry analysis, we confirmed that Tet can effectively inhibit the proliferation and induce apoptosis in HCT116 cells. Mechanically, we found that Tet greatly increases the mRNA and protein level of TGF-β1 in HCT116 cells. Exogenous TGF-β1 enhances the anti-proliferation and apoptosis inducing effect of Tet in HCT116 cells, which has been partly reversed by TGF-β1 inhibitor. Tet decreases the phosphorylation of Akt1/2/3 in HCT116 cells. This effect can be enhanced by exogenous TGF-β1, but partly reversed by TGF-β1 inhibitor. Tet exhibits no effect on total level of PTEN, but decreases the phosphorylation of PTEN; exogenous TGF-β1 enhances the effect of Tet on decreasing the phosphorylation of PTEN, which was partly reversed by TGF-β1 inhibitor. Our findings suggested that Tet may be a promising candidate for colon cancer treatment, and the anticancer activity may be mediated by inactivating PI3K/Akt signaling through upregulating TGF-β1 to decrease the phosphorylation of PTEN.
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Affiliation(s)
- Qian-Zhao Chen
- Department of Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Yang Li
- Department of Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Ying Shao
- Department of Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Yu-Hua Zeng
- Department of Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Wen-Yan Ren
- Department of Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Rong-Xing Liu
- Department of Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Lin-Yun Zhou
- Department of Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Xue-Lian Hu
- Department of Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Ming Huang
- Chongqing Key Laboratory for Biochemistry and Molecular Pharmacology, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Fang He
- Chongqing Key Laboratory for Biochemistry and Molecular Pharmacology, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Wen-Juan Sun
- Department of Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Ke Wu
- Department of Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing 400016, P.R. China
| | - Bai-Cheng He
- Department of Pharmacology, School of Pharmacy, Chongqing Medical University, Chongqing 400016, P.R. China
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23
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Ma Z, Wang Y, Piao T, Liu J. Echinocystic Acid Inhibits IL-1β-Induced COX-2 and iNOS Expression in Human Osteoarthritis Chondrocytes. Inflammation 2017; 39:543-9. [PMID: 26499345 DOI: 10.1007/s10753-015-0278-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Echinocystic acid (EA), a pentacyclic triterpene isolated from the fruits of Gleditsia sinensis Lam, displays a range of pharmacological activities including anti-inflammatory and antioxidant effects. However, the effect of EA on IL-1β-stimulated osteoarthritis chondrocyte has not been reported. The purpose of this study was to assess the effects of EA on IL-1β-stimulated human osteoarthritis chondrocyte. Chondrocytes were stimulated with IL-1β in the absence or presence of EA. NO and PGE2 production were measured by Griess reagent and ELISA. The expression of COX-2, iNOS, nuclear factor-κB (NF-κB), inhibitory kappa B (IκBα), c-Jun N-terminal kinase (JNK), p38, and extracellular signal-regulated kinase (ERK) were detected by Western blot analysis. The results showed that EA suppressed IL-1β-induced collagenase-3 (MMP-13), NO, and PGE2 production in a dose-dependent manner. IL-1β up-regulated the expression of COX-2 and iNOS, and the increase was inhibited by EA. Furthermore, IL-1β-induced NF-κB and mitogen-activated protein kinase (MAPK) activation were inhibited by EA. In conclusion, EA effectively attenuated IL-1β-induced inflammatory response in osteoarthritis chondrocyte which suggesting that EA may be a potential agent in the treatment of osteoarthritis.
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Affiliation(s)
- Zhiqiang Ma
- Department of Orthopedic Surgery, The Second Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150086, People's Republic of China
| | - Yanlong Wang
- Department of Orthopedic Surgery, The Second Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150086, People's Republic of China
| | - Taikui Piao
- Children's Hospital of Harbin, Harbin, Heilongjiang Province, 150010, People's Republic of China
| | - Jianyu Liu
- Department of Orthopedic Surgery, The Second Hospital of Harbin Medical University, Harbin, Heilongjiang Province, 150086, People's Republic of China.
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24
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Meng XL, Zheng LC, Liu J, Gao CC, Qiu MC, Liu YY, Lu J, Wang D, Chen CL. Inhibitory effects of three bisbenzylisoquinoline alkaloids on lipopolysaccharide-induced microglial activation. RSC Adv 2017. [DOI: 10.1039/c7ra01882g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Three bisbenzylisoquinoline alkaloids (liensinine, neferine, and isoliensinine) inhibit lipopolysaccharide-induced microglial activation.
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Affiliation(s)
- Xue-Lian Meng
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
| | - Liang-Chao Zheng
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
| | - Jia Liu
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
| | - Cheng-Cheng Gao
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
| | - Ma-Chao Qiu
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
| | - Ying-Ying Liu
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
| | - Jing Lu
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
| | - Dan Wang
- Research Center for Natural Product Pharmacy of Liaoning Province
- Shenyang 110036
- China
| | - Chang-Lan Chen
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
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25
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Park SY, Jin ML, Wang Z, Park G, Choi YW. 2,3,4',5-tetrahydroxystilbene-2-O-β-d-glucoside exerts anti-inflammatory effects on lipopolysaccharide-stimulated microglia by inhibiting NF-κB and activating AMPK/Nrf2 pathways. Food Chem Toxicol 2016; 97:159-167. [PMID: 27621050 DOI: 10.1016/j.fct.2016.09.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Revised: 09/01/2016] [Accepted: 09/07/2016] [Indexed: 01/27/2023]
Abstract
2,3,4',5-Tetrahydroxystilbene-2-O-β-d-glucoside (THSG) affects neuroinflammation-related neurodegenerative diseases and inhibits neuroinflammatory mediators. However, the detailed impacts and underlying mechanisms of THSG on neuroinflammatory responses are still unclear. The aim of this study was to investigate the anti-neuroinflammatory mechanism of THSG via AMPK/Nrf2 signaling pathways. This study showed that THSG attenuated LPS-induced iNOS, COX-2, TNF-α, and IL-6 activation in microglia. Furthermore, it was observed that activation of IκBα and NF-κB was significantly increased upon LPS stimulation, and suppressed by THSG treatment in a dose-dependent manner. The expression of HO-1 and NQO1, as well as Nrf2 activation, was induced by THSG in microglia. The promoter activity of ARE and HO-1 also increased in a dose-dependent manner following THSG treatment. Nrf2/HO-1/NQO1 has anti-inflammatory properties; the knock-down of Nrf2/HO-1/NQO1 by specific siRNA prevented the THSG-mediated inhibition of iNOS and COX-2 promoter activity. Consistent with this concept, the phosphorylation of LKB1, CaMKII, and AMPK were elevated after THSG treatment. The blockade of AMPK by a pharmacological inhibitor prevented THSG-induced HO-1 and NQO1 expression. The anti-inflammatory properties of THSG were also reversed by treatment with an AMPK inhibitor. In conclusion, we demonstrated that THSG attenuates the LPS-induced neuroinflammatory response mediated by AMPK/Nrf2 signaling pathways.
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Affiliation(s)
- Sun Young Park
- Bio-IT Fusion Technology Research Institute, Pusan National University, Busan 609-735, Republic of Korea
| | - Mei Ling Jin
- Bio-IT Fusion Technology Research Institute, Pusan National University, Busan 609-735, Republic of Korea
| | - Ziyu Wang
- Department of Horticultural Bioscience, Pusan National University, Miryang 627-706, Republic of Korea
| | - Geuntae Park
- Department of Nanomaterials Engineering, Pusan National University, Busan 609-735, Republic of Korea.
| | - Young-Whan Choi
- Department of Horticultural Bioscience, Pusan National University, Miryang 627-706, Republic of Korea.
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26
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Park SY, Jin ML, Chae SY, Ko MJ, Choi YH, Park G, Choi YW. Novel compound from Polygonum multiflorum inhibits inflammatory response in LPS-stimulated microglia by upregulating AMPK/Nrf2 pathways. Neurochem Int 2016; 100:21-29. [PMID: 27545975 DOI: 10.1016/j.neuint.2016.08.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 08/04/2016] [Accepted: 08/11/2016] [Indexed: 11/19/2022]
Abstract
Polygonum multiflorum extracts are known to improve memory and learning ability, and have neuroprotective and anti-aging activity. However, its function and the underlying mechanisms in neuroinflammation-mediated neurodegenerative disease remain poorly understood. In the present study, we investigated the anti-neuroinflammatory effects of several compounds from P. multiflorum, and found a novel compound, CRPE55IB. The CRPE55IB-induced suppression of NO and PGE2 production correlated with inhibition of iNOS and COX-2 protein expression and promoter activity in lipopolysaccharide (LPS)-stimulated microglia. CRPE55IB also reduced the production of pro-inflammatory cytokines (TNF-α and IL-6) induced by LPS. Furthermore, investigation of the molecular mechanism indicated that CRPE55IB inhibited LPS-induced NF-κB activation by inactivating phosphorylation of IKKα/β, and phosphorylation and degradation of IκBα. We further found that CRPE55IB inhibited the phosphorylation of ERK and JNK at a lower concentration than that for p38 MAPK. Further experiments revealed that CRPE55IB treatment considerably increased the activation of Nrf2/ARE, and the expression of its target genes, including HO-1 and NQO1. Moreover, the Knockdown of Nrf2, HO-1, and NQO1 by siRNA abrogated the inhibitory effect of CRPE55IB on iNOS and COX-2 promoter activity. CRPE55IB also induced phosphorylation of AMPK/LKB/CaMKII in microglia. Analysis using a specific inhibitor of AMPK demonstrated that AMPK activation was involved in CRPE55IB-induced HO-1 and NQO1 expression. In addition, the CRPE55IB-induced anti-neuroinflammatory effect was abrogated by a specific inhibitor of AMPK, indicating the important role of AMPK in CRPE55IB-induced anti-neuroinflammation. Collectively, these results demonstrate that CRPE55IB exerts anti-neuroinflammatory effects against LPS via the Nrf2/AMPK signaling pathways.
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Affiliation(s)
- Sun Young Park
- Bio-IT Fusion Technology Research Institute, Pusan National University, Busan, 609-735, Republic of Korea
| | - Mei Ling Jin
- Bio-IT Fusion Technology Research Institute, Pusan National University, Busan, 609-735, Republic of Korea
| | - Seon Yeong Chae
- Bio-IT Fusion Technology Research Institute, Pusan National University, Busan, 609-735, Republic of Korea
| | - Min Jung Ko
- Department of Nanomaterials Engineering, Pusan National University, Busan, 609-735, Republic of Korea
| | - Yung Hyun Choi
- Department of Biochemistry, Dongeui University College of Oriental Medicine, Busan 614-052, Republic of Korea
| | - Geuntae Park
- Department of Nanomaterials Engineering, Pusan National University, Busan, 609-735, Republic of Korea.
| | - Young-Whan Choi
- Department of Horticultural Bioscience, Pusan National University, Miryang, 627-706, Republic of Korea.
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27
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Yang Z, Concannon J, Ng KS, Seyb K, Mortensen LJ, Ranganath S, Gu F, Levy O, Tong Z, Martyn K, Zhao W, Lin CP, Glicksman MA, Karp JM. Tetrandrine identified in a small molecule screen to activate mesenchymal stem cells for enhanced immunomodulation. Sci Rep 2016; 6:30263. [PMID: 27457881 PMCID: PMC4960598 DOI: 10.1038/srep30263] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 06/24/2016] [Indexed: 12/29/2022] Open
Abstract
Pre-treatment or priming of mesenchymal stem cells (MSC) prior to transplantation can significantly augment the immunosuppressive effect of MSC-based therapies. In this study, we screened a library of 1402 FDA-approved bioactive compounds to prime MSC. We identified tetrandrine as a potential hit that activates the secretion of prostaglandin E2 (PGE2), a potent immunosuppressive agent, by MSC. Tetrandrine increased MSC PGE2 secretion through the NF-κB/COX-2 signaling pathway. When co-cultured with mouse macrophages (RAW264.7), tetrandrine-primed MSC attenuated the level of TNF-α secreted by RAW264.7. Furthermore, systemic transplantation of primed MSC into a mouse ear skin inflammation model significantly reduced the level of TNF-α in the inflamed ear, compared to unprimed cells. Screening of small molecules to pre-condition cells prior to transplantation represents a promising strategy to boost the therapeutic potential of cell therapy.
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Affiliation(s)
- Zijiang Yang
- Harvard-MIT Health Sciences and Technology, Cambridge, MA, US.,Department of Medicine, Division of Biomedical Engineering, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, US.,Harvard Stem Cell Institute, Cambridge, MA, US.,Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, US.,Advanced Industrial Technology Research Institute, Shanghai Jiao Tong University, Shanghai, China
| | - John Concannon
- Laboratory for Drug Discovery in Neurodegeneration, Harvard NeuroDiscovery Center, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, US
| | - Kelvin S Ng
- Harvard-MIT Health Sciences and Technology, Cambridge, MA, US.,Department of Medicine, Division of Biomedical Engineering, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, US.,Harvard Stem Cell Institute, Cambridge, MA, US
| | - Kathleen Seyb
- Laboratory for Drug Discovery in Neurodegeneration, Harvard NeuroDiscovery Center, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, US
| | - Luke J Mortensen
- Regenerative Bioscience Center, Department of Animal and Dairy Science, and College of Engineering, University of Georgia, Athens, GA, US
| | - Sudhir Ranganath
- Harvard-MIT Health Sciences and Technology, Cambridge, MA, US.,Department of Medicine, Division of Biomedical Engineering, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, US.,Harvard Stem Cell Institute, Cambridge, MA, US.,Department of Chemical Engineering, Siddaganga Institute of Technology, Tumkur, India
| | - Fangqi Gu
- Harvard-MIT Health Sciences and Technology, Cambridge, MA, US.,Department of Medicine, Division of Biomedical Engineering, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, US.,Harvard Stem Cell Institute, Cambridge, MA, US
| | - Oren Levy
- Harvard-MIT Health Sciences and Technology, Cambridge, MA, US.,Department of Medicine, Division of Biomedical Engineering, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, US.,Harvard Stem Cell Institute, Cambridge, MA, US
| | - Zhixiang Tong
- Harvard-MIT Health Sciences and Technology, Cambridge, MA, US.,Department of Medicine, Division of Biomedical Engineering, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, US.,Harvard Stem Cell Institute, Cambridge, MA, US
| | - Keir Martyn
- Harvard-MIT Health Sciences and Technology, Cambridge, MA, US.,Department of Medicine, Division of Biomedical Engineering, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, US.,Harvard Stem Cell Institute, Cambridge, MA, US
| | - Weian Zhao
- Department of Pharmaceutical Sciences, Sue and Bill Gross Stem Cell Research Center and Chao Family Comprehensive Cancer Center, Department of Biomedical Engineering, and Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California, Irvine, CA, US
| | - Charles P Lin
- Department of Medicine, Division of Biomedical Engineering, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, US.,Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, US
| | - Marcie A Glicksman
- Department of Medicine, Division of Biomedical Engineering, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, US.,Laboratory for Drug Discovery in Neurodegeneration, Harvard NeuroDiscovery Center, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, US
| | - Jeffrey M Karp
- Harvard-MIT Health Sciences and Technology, Cambridge, MA, US.,Department of Medicine, Division of Biomedical Engineering, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, US.,Harvard Stem Cell Institute, Cambridge, MA, US
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28
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Li X, Jin Q, Wu YL, Sun P, Jiang S, Zhang Y, Zhang DQ, Zhang YJ, Lian LH, Nan JX. Tetrandrine regulates hepatic stellate cell activation via TAK1 and NF-κB signaling. Int Immunopharmacol 2016; 36:263-270. [DOI: 10.1016/j.intimp.2016.04.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 03/25/2016] [Accepted: 04/25/2016] [Indexed: 02/08/2023]
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29
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Bhagya N, Chandrashekar KR. Tetrandrine--A molecule of wide bioactivity. PHYTOCHEMISTRY 2016; 125:5-13. [PMID: 26899361 DOI: 10.1016/j.phytochem.2016.02.005] [Citation(s) in RCA: 135] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 02/02/2016] [Accepted: 02/07/2016] [Indexed: 05/18/2023]
Abstract
Stephania tetrandra and other related species of Menispermaceae form the major source of the bisbenzylisoquinoline alkaloid - tetrandrine. The plant is extensively referenced in the Chinese Pharmacopoeia for its use in the Chinese medicinal system as an analgesic and diuretic agent and also in the treatment of hypertension and various other ailments, including asthma, tuberculosis, dysentery, hyperglycemia, malaria, cancer and fever. Tetrandrine, well-known to act as a calcium channel blocker, has been tested in clinical trials and found effective against silicosis, hypertension, inflammation and lung cancer without any toxicity. Recently, the efficacy of tetrandrine was tested against Mycobaterium tuberculosis, Candida albicans, Plasmodium falciparum and Ebola virus. Tetrandrine's pharmacological property has been proved to be through its action on different signalling pathways like reactive oxygen species, enhanced autophagic flux, reversal of multi drug resistance, caspase pathway, cell cycle arrest and by modification of calcium channels. The present review summarises current knowledge on the synthesis, distribution, extraction, structural elucidation, pharmacological properties and the mechanism of action of tetrandrine. Future perspectives in the clinical use of tetrandrine as a drug are also considered.
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Affiliation(s)
- N Bhagya
- Department of Applied Botany, Mangalore University, Mangalagangotri, Mangalore 574 199, Karnataka, India
| | - K R Chandrashekar
- Department of Applied Botany, Mangalore University, Mangalagangotri, Mangalore 574 199, Karnataka, India.
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30
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Xu J, Liu D, Yin Q, Guo L. Tetrandrine suppresses β‑glucan‑induced macrophage activation via inhibiting NF‑κB, ERK and STAT3 signaling pathways. Mol Med Rep 2016; 13:5177-84. [PMID: 27121946 DOI: 10.3892/mmr.2016.5187] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 04/05/2016] [Indexed: 11/05/2022] Open
Abstract
Macrophages are important in inflammation through the production of various proinflammatory mediators. β‑glucan is a polymer of glucose, which is produced by numerous different organisms, including fungi, and acts as a trigger for the induction of inflammatory responses. Tetrandrine (TET), a bis‑benzylisoquinoline alkaloid isolated from the Chinese herb Radix Stephania tetrandra, has been demonstrated to modulate inflammatory responses. In the present study, it was investigated whether TET affects the inflammatory reaction induced by β‑glucan in murine and human macrophages. It was demonstrated that β‑glucan induced the activation of nuclear factor (NF)‑κB and markedly increased the levels of tumor necrosis factor‑α (TNF‑α) and interleukin 1 β (IL‑1β) in macrophages. Treatment with TET resulted in downregulation of phosphorylated NF‑κB p65 and reduction of the production of TNF‑α and IL‑1β. In addition, the phosphorylation of ERK and STAT3 was decreased by TET in activated macrophages. Furthermore, it was demonstrated that the inhibitory effects of TET on β‑glucan‑induced macrophage activation was not due to its cytotoxic action. Conclusively, these results indicate that TET can decrease the inflammatory responses mediated by β‑glucan in macrophages. Thus, TET may serve as an effective tool for the treatment of β‑glucan‑associated inflammatory diseases.
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Affiliation(s)
- Jing Xu
- Department of Laboratory Medicine, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu 212001, P.R. China
| | - Dabiao Liu
- Department of Laboratory Medicine, The Affiliated Fourth People's Hospital of Jiangsu University, Zhenjiang, Jiangsu 212001, P.R. China
| | - Qing Yin
- Department of Laboratory Medicine, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu 212001, P.R. China
| | - Lanfang Guo
- Department of Laboratory Medicine, The Affiliated Fourth People's Hospital of Jiangsu University, Zhenjiang, Jiangsu 212001, P.R. China
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31
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Guo K, Cang J. A novel tetrandrine-loaded chitosan microsphere: characterization and in vivo evaluation. DRUG DESIGN DEVELOPMENT AND THERAPY 2016; 10:1291-8. [PMID: 27099474 PMCID: PMC4821377 DOI: 10.2147/dddt.s103169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In this study, novel tetrandrine-loaded chitosan microspheres were prepared by the emulsion cross-linking method. The systems were then characterized for physicochemical properties and in vitro drug release. In addition, the pharmacokinetics and tissue distribution of microspheres were further verified in animal models. Particle-size distribution indicated that the size of microspheres was within the range of 7–15 μm, with a median diameter of 12.4 μm. The drug loading and entrapment efficiency of the formulation were 34.6%±12.5% and 87.3%±9.7% (mean ± SD), respectively. In vitro release showed a typical sustained and long-term drug release behavior. The Higuchi equation was the model that fit best with release data. Maintaining a relatively constant plasma concentration in the long-term drug treatment is an outstanding pharmacokinetic advantage of tetrandrine microspheres in vivo. Moreover, compared with tetrandrine solution, tetrandrine microspheres produced a lower drug concentration in the heart, liver, and kidneys. This indicated that the microspheres used in this study were preferable for targeting lung tissue versus other tissues. No damage to the tissues of the lung was found in histopathological examination.
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Affiliation(s)
- Kefang Guo
- Department of Anesthesia, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Jing Cang
- Department of Anesthesia, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
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32
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Anwar MA, Al Disi SS, Eid AH. Anti-Hypertensive Herbs and Their Mechanisms of Action: Part II. Front Pharmacol 2016; 7:50. [PMID: 27014064 PMCID: PMC4782109 DOI: 10.3389/fphar.2016.00050] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 02/22/2016] [Indexed: 01/20/2023] Open
Abstract
Traditional medicine has a history extending back to thousands of years, and during the intervening time, man has identified the healing properties of a very broad range of plants. Globally, the use of herbal therapies to treat and manage cardiovascular disease (CVD) is on the rise. This is the second part of our comprehensive review where we discuss the mechanisms of plants and herbs used for the treatment and management of high blood pressure. Similar to the first part, PubMed and ScienceDirect databases were utilized, and the following keywords and phrases were used as inclusion criteria: hypertension, high blood pressure, herbal medicine, complementary and alternative medicine, endothelial cells, nitric oxide (NO), vascular smooth muscle cell (VSMC) proliferation, hydrogen sulfide, nuclear factor kappa-B (NF-κB), oxidative stress, and epigenetics/epigenomics. Each of the aforementioned keywords was co-joined with plant or herb in question, and where possible with its constituent molecule(s). This part deals in particular with plants that are used, albeit less frequently, for the treatment and management of hypertension. We then discuss the interplay between herbs/prescription drugs and herbs/epigenetics in the context of this disease. The review then concludes with a recommendation for more rigorous, well-developed clinical trials to concretely determine the beneficial impact of herbs and plants on hypertension and a disease-free living.
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Affiliation(s)
- M Akhtar Anwar
- Department of Biological and Environmental Sciences, Qatar University Doha, Qatar
| | - Sara S Al Disi
- Department of Biological and Environmental Sciences, Qatar University Doha, Qatar
| | - Ali H Eid
- Department of Biological and Environmental Sciences, Qatar UniversityDoha, Qatar; Department of Pharmacology and Toxicology, Faculty of Medicine, American University of BeirutBeirut, Lebanon
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33
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Dang Y, Mu Y, Wang K, Xu K, Yang J, Zhu Y, Luo B. Papaverine inhibits lipopolysaccharide-induced microglial activation by suppressing NF-κB signaling pathway. DRUG DESIGN DEVELOPMENT AND THERAPY 2016; 10:851-9. [PMID: 27013863 PMCID: PMC4777259 DOI: 10.2147/dddt.s97380] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Objective To investigate the effects of papaverine (PAP) on lipopolysaccharide (LPS)-induced microglial activation and its possible mechanisms. Materials and methods BV2 microglial cells were first pretreated with PAP (0, 0.4, 2, 10, and 50 μg/mL) and then received LPS stimulation. Transcription and production of proinflammatory factors (IL1β, TNFα, iNOS, and COX-2) were used to evaluate microglial activation. The transcriptional changes undergone by M1/M2a/M2b markers were used to evaluate phenotype transformation of BV2 cells. Immunofluorescent staining and Western blot were used to detect the location and expression of P65 and p-IKK in the presence or absence of PAP pretreatment. Results Pretreatment with PAP significantly inhibited the expression of IL1β and TNFα, and suppressed the transcription of M1/M2b markers Il1rn, Socs3, Nos2 and Ptgs2, but upregulated the transcription of M2a markers (Arg1 and Mrc1) in a dose-dependent manner. In addition, PAP pretreatment significantly decreased the expression of p-IKK and inhibited the nuclear translocation of P65 after LPS stimulation. Conclusion PAP not only suppressed the LPS-induced microglial activity by inhibiting transcription/production of proinflammatory factors, but also promoted the transformation of activated BV2 cells from cytotoxic phenotypes (M1/M2b) to a neuroprotective phenotype (M2a). These effects were probably mediated by NF-κB signaling pathway. Thus, it would be a promising candidate for the treatment of neurodegenerative diseases.
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Affiliation(s)
- Yalong Dang
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People's Republic of China
| | - Yalin Mu
- Department of Ophthalmology, Yellow-River Hospital, Sanmenxia City, People's Republic of China
| | - Kun Wang
- Clinical Laboratory, Yellow-River Hospital, Sanmenxia City, People's Republic of China
| | - Ke Xu
- Department of Ophthalmology, Yellow-River Hospital, Sanmenxia City, People's Republic of China
| | - Jing Yang
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People's Republic of China
| | - Yu Zhu
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People's Republic of China
| | - Bin Luo
- Department of Ophthalmology, Yellow-River Hospital, Sanmenxia City, People's Republic of China; Clinical Laboratory, Yellow-River Hospital, Sanmenxia City, People's Republic of China
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Ye S, Zhou T, Cheng K, Chen M, Wang Y, Jiang Y, Yang P. Carboxylic Acid Fullerene (C60) Derivatives Attenuated Neuroinflammatory Responses by Modulating Mitochondrial Dynamics. NANOSCALE RESEARCH LETTERS 2015; 10:953. [PMID: 26058514 PMCID: PMC4481245 DOI: 10.1186/s11671-015-0953-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 05/21/2015] [Indexed: 05/30/2023]
Abstract
Fullerene (C60) derivatives, a unique class of compounds with potent antioxidant properties, have been reported to exert a wide variety of biological activities including neuroprotective properties. Mitochondrial dynamics are an important constituent of cellular quality control and function, and an imbalance of the dynamics eventually leads to mitochondria disruption and cell dysfunctions. This study aimed to assess the effects of carboxylic acid C60 derivatives (C60-COOH) on mitochondrial dynamics and elucidate its associated mechanisms in lipopolysaccharide (LPS)-stimulated BV-2 microglial cell model. Using a cell-based functional screening system labeled with DsRed2-mito in BV-2 cells, we showed that LPS stimulation led to excessive mitochondrial fission, increased mitochondrial localization of dynamin-related protein 1 (Drp1), both of which were markedly suppressed by C60-COOH pretreatment. LPS-induced mitochondria reactive oxygen species (ROS) generation and collapse of mitochondrial membrane potential (ΔΨm) were also significantly inhibited by C60-COOH. Moreover, we also found that C60-COOH pretreatment resulted in the attenuation of LPS-mediated activation of nuclear factor (NF)-κB and mitogen-activated protein kinase (MAPK) signaling, as well as the production of pro-inflammatory mediators. Taken together, these findings demonstrated that carboxylic acid C60 derivatives may exert neuroprotective effects through regulating mitochondrial dynamics and functions in microglial cells, thus providing novel insights into the mechanisms of the neuroprotective properties of carboxylic acid C60 derivatives.
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Affiliation(s)
- Shefang Ye
- />Research Center of Biomedical Engineering, Department of Biomaterials, College of Materials, Xiamen University, Xiamen, 361005 People’s Republic of China
| | - Tong Zhou
- />Research Center of Biomedical Engineering, Department of Biomaterials, College of Materials, Xiamen University, Xiamen, 361005 People’s Republic of China
| | - Keman Cheng
- />Research Center of Biomedical Engineering, Department of Biomaterials, College of Materials, Xiamen University, Xiamen, 361005 People’s Republic of China
| | - Mingliang Chen
- />Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, 361005 People’s Republic of China
| | - Yange Wang
- />Research Center of Biomedical Engineering, Department of Biomaterials, College of Materials, Xiamen University, Xiamen, 361005 People’s Republic of China
| | - Yuanqin Jiang
- />Department of Surgery, First Affiliated Hospital of Xiamen University, Xiamen, 361003 People’s Republic of China
| | - Peiyan Yang
- />Department of Surgery, First Affiliated Hospital of Xiamen University, Xiamen, 361003 People’s Republic of China
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HORNG CHITING, YANG JAISING, CHIANG JOHUA, LU CHICHENG, LEE CHIUFANG, CHIANG NINA, CHEN FUAN. Inhibitory effects of tetrandrine on epidermal growth factor-induced invasion and migration in HT29 human colorectal adenocarcinoma cells. Mol Med Rep 2015; 13:1003-9. [DOI: 10.3892/mmr.2015.4635] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 10/19/2015] [Indexed: 11/05/2022] Open
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Fan B, Dun SH, Gu JQ, Guo Y, Ikuyama S. Pycnogenol Attenuates the Release of Proinflammatory Cytokines and Expression of Perilipin 2 in Lipopolysaccharide-Stimulated Microglia in Part via Inhibition of NF-κB and AP-1 Activation. PLoS One 2015; 10:e0137837. [PMID: 26367267 PMCID: PMC4569068 DOI: 10.1371/journal.pone.0137837] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 08/22/2015] [Indexed: 01/29/2023] Open
Abstract
Over activation of microglia results in the production of proinflammatory agents that have been implicated in various brain diseases. Pycnogenol is a patented extract from French maritime pine bark (Pinus pinaster Aiton) with strong antioxidant and anti-inflammatory potency. The present study investigated whether pycnogenol may be associated with the production of proinflammatory mediators in lipopolysaccharide-stimulated BV2 (mouse-derived) microglia. It was found that pycnogenol treatment was dose-dependently associated with significantly less release of nitricoxide (NO), TNF-α, IL-6 and IL-1β, and lower levels of intercellular adhesion molecule1 (ICAM-1) and perilipin 2 (PLIN2). Furthermore, this effect was replicated in primary brain microglia. Levels of inducible NO synthase mRNA and protein were attenuated, whereas there was no change in the production of the anti-inflammatory cytokine IL-10. Further evidence indicated that pycnogenol treatment led to the suppression of NF-κB activation through inhibition of p65 translocation into the nucleus and inhibited DNA binding of AP-1, suggesting that these proinflammatory factors are associated with NF-κB and AP-1. We conclude that pycnogenol exerts anti-inflammatory effects through inhibition of the NF-κB and AP-1pathway, and may be useful as a therapeutic agent in the prevention of diseases caused by over activation of microglia.
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Affiliation(s)
- Bin Fan
- Department of Neurology, Shengjing Hospital, China Medical University, Shenyang, 110004, P. R. China
- * E-mail:
| | - Sai-Hong Dun
- Department of Neurology, Shengjing Hospital, China Medical University, Shenyang, 110004, P. R. China
| | - Jian-Qiu Gu
- Department of Endocrinology and Metabolism, First Affiliated Hospital, P. R. China Medical University, Shenyang, 110001, P. R. China
| | - Yang Guo
- Department of Neurology, Shengjing Hospital, China Medical University, Shenyang, 110004, P. R. China
| | - Shoichiro Ikuyama
- Department of Clinical Investigation & Department of Endocrine, Metabolic and Rheumatic Diseases, Oita San-ai Medical center, Oita, 870–1151, Japan
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Song W, Huang P, Zhang C. Neuroprotective therapies for glaucoma. DRUG DESIGN DEVELOPMENT AND THERAPY 2015; 9:1469-79. [PMID: 25792807 PMCID: PMC4362661 DOI: 10.2147/dddt.s80594] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Glaucoma is the second leading cause for blindness worldwide. It is mainly caused by glaucomatous optic neuropathy (GON) characterized by retinal ganglion cell loss, which leads to visual field defect and blindness. Up to now, the main purpose of antiglaucomatous therapies has been to lower intraocular pressure (IOP) through surgeries and medications. However, it has been found that progressive GON is still present in some patients with effective IOP decrease. Therefore, risk factors other than IOP elevation, like neurotrophin deprivation and excitotoxicity, contribute to progressive GON. Novel approaches of neuroprotection may be more effective for preserving the function of the optic nerve.
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Affiliation(s)
- Wei Song
- Department of Ophthalmology, Peking University Third Hospital, Beijing, People's Republic of China
| | - Ping Huang
- Department of Ophthalmology, Peking University Third Hospital, Beijing, People's Republic of China
| | - Chun Zhang
- Department of Ophthalmology, Peking University Third Hospital, Beijing, People's Republic of China
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Dong X, Luo M, Huang G, Zhang J, Tong F, Cheng Y, Cai Q, Dong J, Wu G, Cheng J. Relationship between irradiation-induced neuro-inflammatory environments and impaired cognitive function in the developing brain of mice. Int J Radiat Biol 2015; 91:224-39. [PMID: 25426696 DOI: 10.3109/09553002.2014.988895] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE Radiation-induced brain injury (RIBI) is the most common side-effect after cranial radiation therapy (CRT). In the present study, the RIBI mice model was established and the changes in the expression of tumor necrosis factor alpha (TNF-α) and interleukin-1beta (IL-1β) mRNA, and the related signal pathways in the hippocampus of this model were investigated. MATERIALS AND METHODS 10 Gy CRT or sham-irradiation was given to the three-week old mice. The water maze test was used to test the RIBI model in mice. The expression of pro-inflammatory cytokines was detected by real-time polymerase chain reaction (PCR) in vivo. The changes of microglial activation and neurogensis in the hippocampus were analyzed by immunofluorescence and immunohistochemistry. The cytoplasm to nuclei translocation of Nuclear factor kappa B (NF-κB), and the protein expressions of IkappaB-alpha (IκB-α), NF-κB essential modulator (NEMO), p53-induced protein with a death domain (PIDD), TNF-α and IL-1β were examined by Western blotting. A RIBI model was established by Morris water maze test 6 weeks after 10 Gy CRT in three-week old C57BL/6J mice. RESULTS The mRNA and protein expression levels of TNF-α and IL-1β reached the peak during the early phase after CRT. Increases in cytokine levels also were observed after irradiation of mouse BV-2 microglial cells. Neurogensis was significantly inhibited in the hippocampus with an increase of terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) positive cells. The total number of microglia was decreased after CRT, but microglial activation was significantly increased. Western blotting revealed, in the RIBI mice, the expression of IκB-α was down-regulated, accompanied by the up-regulated expression of NEMO and regulated auto-proteolysis of PIDD. Also the NF-κB pathway activation was observed in BV-2 cells after irradiation. CONCLUSIONS CRT-induced pro-inflammatory cytokines release in the brain tissues and inhibition of neurogenesis in the hippocampus might be contributed by the microglial activation and play an important role in RIBI.
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Affiliation(s)
- Xiaorong Dong
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , P. R. China
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