1
|
Li H, Lv L, Wu C, Qi J, Shi B. Methyl Jasmonate Protects Microglial Cells Against β-Amyloid-Induced Oxidative Stress and Inflammation via Nrf2-Dependent HO-1 Pathway. Neuropsychiatr Dis Treat 2020; 16:1399-1410. [PMID: 32606694 PMCID: PMC7283234 DOI: 10.2147/ndt.s241142] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 03/31/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND β-Amyloid (Aβ) induces oxidative stress and inflammation of microglial cells, thus leading to Alzheimer's disease. Methyl jasmonate (MeJA) is reported to have anti-inflammatory and anti-oxidant effects. However, the potential roles of MeJA in Aβ-induced cell activities and the underlying mechanism are unclear. METHODS Microglial cell line BV-2 was stimulated by 20 μM Aβ and/or 20 μM MeJA and then divided into four groups (control, Aβ, MeJA, and Aβ+MeJA). Cell viability was detected by MTT assay. MDA, SOD activity, and ROS were detected by fluorescence spectrophotometry and immunofluorescence assay. Nrf2 and HO-1 were detected by qRT-PCR and Western blot. Furthermore, inflammatory cytokines (p-NFκB, TLR4, TNF-α, IL-1β, and IL-6) and apoptosis factors (Bcl-2, Bax, and cl-casp-3) were detected by Western blot. TUNEL assay was applied to investigate apoptosis rate. Moreover, the mechanism of how MeJA played anti-oxidative stress and anti-inflammatory roles was investigated by silencing of Nrf2 via siRNA. RESULTS The result of MTT assay showed that MeJA improved the decreased viability of BV-2 cells induced by Aβ. The detection of MDA, SOD activity, and ROS showed the oxidative stress levels were decreased in Aβ+MeJA group compared with Aβ group. Nrf2, HO-1, and SOD were significantly up-regulated in Aβ+MeJA group compared with Aβ group (p<0.01). In contrast, inflammatory cytokines were significantly down-regulated in Aβ+MeJA group compared with Aβ group (p<0.05). Similarly, the expressions of apoptosis cytokines and TUNEL assay suggested a decreased apoptosis rate in Aβ+MeJA group compared to Aβ group (p<0.01). Finally, results of Nrf2 knockdown experiment showed down-regulations of anti-oxidative stress factors (Nrf2, HO-1 and SOD), up-regulations of inflammatory cytokines, and increased ratio of Bax to Bcl in Aβ+MeJA+si-Nrf2 group compared with Aβ+MeJA group (p<0.01). CONCLUSION MeJA could relieve Aβ-induced oxidative stress and inflammatory response in microglial cells by activating Nrf2/HO-1 pathway.
Collapse
Affiliation(s)
- Hua Li
- Department of Neurology, Anqiu People's Hospital, Anqiu 262100, Shandong, People's Republic of China
| | - Limei Lv
- Department of Neurology, Traditional Chinese Medical Hospital of Anqiu, Anqiu 262100, People's Republic of China
| | - Chunyan Wu
- Department of Neurology, Affiliated Hospital of Weifang Medical College, Weifang 261031, Shandong, People's Republic of China
| | - Jisheng Qi
- Department of Rehabilitation Medicine, Shandong Rongjun General Hospital, Jinan 250000, Shandong, People's Republic of China
| | - Baolin Shi
- Department of Neurology, Weifang People's Hospital, Weifang 261031, Shandong, People's Republic of China
| |
Collapse
|
2
|
Cui SS, Feng XB, Zhang BH, Xia ZY, Zhan LY. Exendin-4 attenuates pain-induced cognitive impairment by alleviating hippocampal neuroinflammation in a rat model of spinal nerve ligation. Neural Regen Res 2020; 15:1333-1339. [PMID: 31960821 PMCID: PMC7047783 DOI: 10.4103/1673-5374.272620] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Glucagon-like peptide-1 receptor has anti-apoptotic, anti-inflammatory, and neuroprotective effects. It is now recognized that the occurrence and development of chronic pain are strongly associated with anti-inflammatory responses; however, it is not clear whether glucagon-like peptide-1 receptor regulates chronic pain via anti-inflammatory mechanisms. We explored the effects of glucagon-like peptide-1 receptor on nociception, cognition, and neuroinflammation in chronic pain. A rat model of chronic pain was established using left L5 spinal nerve ligation. The glucagon-like peptide-1 receptor agonist exendin-4 was intrathecally injected into rats from 10 to 21 days after spinal nerve ligation. Electrophysiological examinations showed that, after treatment with exendin-4, paw withdrawal frequency of the left limb was significantly reduced, and pain was relieved. In addition, in the Morris water maze test, escape latency increased and the time to reach the platform decreased following exendin-4 treatment. Immunohistochemical staining and western blot assays revealed an increase in the numbers of activated microglia and astrocytes in the dentate gyrus of rat hippocampus, as well as an increase in the expression of tumor necrosis factor alpha, interleukin 1 beta, and interleukin 6. All of these effects could be reversed by exendin-4 treatment. These findings suggest that exendin-4 can alleviate pain-induced neuroinflammatory responses and promote the recovery of cognitive function via the glucagon-like peptide-1 receptor pathway. All experimental procedures and protocols were approved by the Experimental Animal Ethics Committee of Renmin Hospital of Wuhan University of China (approval No. WDRM 20171214) on September 22, 2017.
Collapse
Affiliation(s)
- Shan-Shan Cui
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Xiao-Bo Feng
- Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Bing-Hong Zhang
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Zhong-Yuan Xia
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Li-Ying Zhan
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| |
Collapse
|
3
|
Alabi AO, Ajayi AM, Ben-Azu B, Omorobge O, Umukoro S. Methyl jasmonate ameliorates rotenone-induced motor deficits in rats through its neuroprotective activity and increased expression of tyrosine hydroxylase immunopositive cells. Metab Brain Dis 2019; 34:1723-1736. [PMID: 31463866 DOI: 10.1007/s11011-019-00478-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Accepted: 08/05/2019] [Indexed: 02/07/2023]
Abstract
Decreased tyrosine hydroxylase (TH) activity, due to degeneration of dopaminergic neurons contributes to the low dopamine content and the motor deficits that characterized Parkinson's disease (PD). This study examines the effect of methyl jasmonate (MJ), a neuroprotective bioactive compound isolated from jasminum grandiflorum, on motor functions, immunopositive cells of TH, dendritic neurons and dopamine contents in rotenone (Rot)-treated rats. Rats pretreated daily with MJ (100 mg/kg, i.p) for 21 days also received Rot (2.5 mg/kg, i.p.) 30 min after each pretreatment for every 48 h for 21 days. Motor functions were assessed on day 22. The specific brain regions of the rats were processed for determination of dopamine contents, immunopositive cells of TH, neuronal cell morphology and dendritic aborizations. Rot impaired locomotion and rearing behavior, and decreased dopamine content in the striatum, prefrontal cortex and midbrain. It further reduced the expression of TH in the substantia nigra and striatum relative to vehicle-control (p < 0.05). Histopathologic studies revealed that Rot-treated rats had degenerated neurons with pyknotic nuclei and loss of nigrostriatal neuronal cells. Rot also altered the nigrostriatal dendritic neuronal networks, decreased the dendritic length and spine density. However, pretreatment with MJ improved motor deficits, increased TH activity and dopamine contents in the specific brain regions of Rot-treated rats. MJ also attenuated the cyto-architectural distortions, loss of neuronal cells and dendritic aborizations of the striatum of Rot-treated rats. These findings suggest that MJ may reverse the motor deficits associated with PD by modifying the key pathological abnormalities involved in the disease progression.
Collapse
Affiliation(s)
- Akinyinka O Alabi
- Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, Olabisi Onabanjo University, Ago-Iwoye, Nigeria
- Neuropharmacology Unit, Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Abayomi M Ajayi
- Neuropharmacology Unit, Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Benneth Ben-Azu
- Neuropharmacology Unit, Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, College of Medicine, University of Ibadan, Ibadan, Nigeria
- Department of Pharmacology, Faculty of Basic Medical Sciences, PAMO University of Medical Sciences, River States, Port Harcourt, Nigeria
| | - Osarume Omorobge
- Neuropharmacology Unit, Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Solomon Umukoro
- Neuropharmacology Unit, Department of Pharmacology and Therapeutics, Faculty of Basic Medical Sciences, College of Medicine, University of Ibadan, Ibadan, Nigeria.
| |
Collapse
|
4
|
Provenzano F, Sánchez JL, Rao E, Santonocito R, Ditta LA, Borrás Linares I, Passantino R, Campisi P, Dia MG, Costa MA, Segura-Carretero A, San Biagio PL, Giacomazza D. Water Extract of Cryphaea heteromalla (Hedw.) D. Mohr Bryophyte as a Natural Powerful Source of Biologically Active Compounds. Int J Mol Sci 2019; 20:ijms20225560. [PMID: 31703399 PMCID: PMC6887972 DOI: 10.3390/ijms20225560] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 10/29/2019] [Accepted: 10/31/2019] [Indexed: 12/18/2022] Open
Abstract
Bryophytes comprise of the mosses, liverworts, and hornworts. Cryphaea heteromalla, (Hedw.) D. Mohr, is a non-vascular lower plant belonging to mosses group. To the date, the most chemically characterized species belong to the liverworts, while only 3.2% and 8.8% of the species belonging to the mosses and hornworts, respectively, have been investigated. In this work, we present Folin-Ciocalteu and oxygen radical absorbance capacity (ORAC) data related to crude extracts of C. heteromalla obtained by three different extraction solvents: pure water (WT), methanol:water (80:20 v/v) (MET), and ethanol:water (80:20 v/v) (ETH). The water extract proved to be the best solvent showing the highest content of biophenols and the highest ORAC value. The C. heteromalla-WT extract was investigated by HPLC-TOF/MS (High Performance Liquid Chromatography-Time of Flight/Mass Spectrometry) allowing for the detection of 14 compounds, five of which were phenolic compounds, derivatives of benzoic, caffeic, and coumaric acids. Moreover, the C. heteromalla WT extract showed a protective effect against reactive oxygen species (ROS) generation induced by tert-butyl hydroperoxide (TBH) on the murine NIH-3T3 fibroblast cell line.
Collapse
Affiliation(s)
- Fiorenza Provenzano
- Istituto di Biofisica, Consiglio Nazionale delle Ricerche, Via U. La Malfa, 153, 90146 Palermo, Italy; (F.P.); (E.R.); (R.S.); (L.A.D.); (R.P.); (D.G.)
| | - Jesús Lozano Sánchez
- Department of Food Science and Nutrition, University of Granada, Campus Universitario s/n, 18071 Granada, Spain;
- Center of Research and Development of Functional Food, Health Science Technological Park, Avda. del Conocimiento s/n, 18100 Granada, Spain; (I.B.L.); (A.S.-C.)
| | - Estella Rao
- Istituto di Biofisica, Consiglio Nazionale delle Ricerche, Via U. La Malfa, 153, 90146 Palermo, Italy; (F.P.); (E.R.); (R.S.); (L.A.D.); (R.P.); (D.G.)
| | - Radha Santonocito
- Istituto di Biofisica, Consiglio Nazionale delle Ricerche, Via U. La Malfa, 153, 90146 Palermo, Italy; (F.P.); (E.R.); (R.S.); (L.A.D.); (R.P.); (D.G.)
| | - Lorena Anna Ditta
- Istituto di Biofisica, Consiglio Nazionale delle Ricerche, Via U. La Malfa, 153, 90146 Palermo, Italy; (F.P.); (E.R.); (R.S.); (L.A.D.); (R.P.); (D.G.)
| | - Isabel Borrás Linares
- Center of Research and Development of Functional Food, Health Science Technological Park, Avda. del Conocimiento s/n, 18100 Granada, Spain; (I.B.L.); (A.S.-C.)
| | - Rosa Passantino
- Istituto di Biofisica, Consiglio Nazionale delle Ricerche, Via U. La Malfa, 153, 90146 Palermo, Italy; (F.P.); (E.R.); (R.S.); (L.A.D.); (R.P.); (D.G.)
| | - Patrizia Campisi
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, Università di Palermo, Via Archirafi 38, 90123 Palermo, Italy; (P.C.)
| | - Maria Giovanna Dia
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche, Università di Palermo, Via Archirafi 38, 90123 Palermo, Italy; (P.C.)
| | - Maria Assunta Costa
- Istituto di Biofisica, Consiglio Nazionale delle Ricerche, Via U. La Malfa, 153, 90146 Palermo, Italy; (F.P.); (E.R.); (R.S.); (L.A.D.); (R.P.); (D.G.)
- Correspondence: (M.A.C.); (P.L.S.B.)
| | - Antonio Segura-Carretero
- Center of Research and Development of Functional Food, Health Science Technological Park, Avda. del Conocimiento s/n, 18100 Granada, Spain; (I.B.L.); (A.S.-C.)
- Department of Analytical Chemistry, Faculty of Sciences, University of Granada, 18071 Granada, Spain
| | - Pier Luigi San Biagio
- Istituto di Biofisica, Consiglio Nazionale delle Ricerche, Via U. La Malfa, 153, 90146 Palermo, Italy; (F.P.); (E.R.); (R.S.); (L.A.D.); (R.P.); (D.G.)
- Correspondence: (M.A.C.); (P.L.S.B.)
| | - Daniela Giacomazza
- Istituto di Biofisica, Consiglio Nazionale delle Ricerche, Via U. La Malfa, 153, 90146 Palermo, Italy; (F.P.); (E.R.); (R.S.); (L.A.D.); (R.P.); (D.G.)
| |
Collapse
|