1
|
Nepetin, a natural compound from Inulae flos, suppresses degranulation and eicosanoid generation through PLCγ1 and Akt signaling pathways in mast cells. Arch Pharm Res 2020; 43:224-232. [DOI: 10.1007/s12272-020-01212-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 01/20/2020] [Indexed: 01/22/2023]
|
2
|
Cross-Linking Mast Cell Specific Gangliosides Stimulates the Release of Newly Formed Lipid Mediators and Newly Synthesized Cytokines. Mediators Inflamm 2016; 2016:9160540. [PMID: 27578923 PMCID: PMC4992799 DOI: 10.1155/2016/9160540] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 07/13/2016] [Indexed: 01/18/2023] Open
Abstract
Mast cells are immunoregulatory cells that participate in inflammatory processes. Cross-linking mast cell specific GD1b derived gangliosides by mAbAA4 results in partial activation of mast cells without the release of preformed mediators. The present study examines the release of newly formed and newly synthesized mediators following ganglioside cross-linking. Cross-linking the gangliosides with mAbAA4 released the newly formed lipid mediators, prostaglandins D2 and E2, without release of leukotrienes B4 and C4. The effect of cross-linking these gangliosides on the activation of enzymes in the arachidonate cascade was then investigated. Ganglioside cross-linking resulted in phosphorylation of cytosolic phospholipase A2 and increased expression of cyclooxygenase-2. Translocation of 5-lipoxygenase from the cytosol to the nucleus was not induced by ganglioside cross-linking. Cross-linking of GD1b derived gangliosides also resulted in the release of the newly synthesized mediators, interleukin-4, interleukin-6, and TNF-α. The effect of cross-linking the gangliosides on the MAP kinase pathway was then investigated. Cross-linking the gangliosides induced the phosphorylation of ERK1/2, JNK1/2, and p38 as well as activating both NFκB and NFAT in a Syk-dependent manner. Therefore, cross-linking the mast cell specific GD1b derived gangliosides results in the activation of signaling pathways that culminate with the release of newly formed and newly synthesized mediators.
Collapse
|
3
|
Jeong KT, Lee E, Park NY, Kim SG, Park HH, Lee J, Lee YJ, Lee E. Imperatorin Suppresses Degranulation and Eicosanoid Generation in Activated Bone Marrow-Derived Mast Cells. Biomol Ther (Seoul) 2015; 23:421-7. [PMID: 26336581 PMCID: PMC4556201 DOI: 10.4062/biomolther.2015.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 06/12/2015] [Accepted: 06/17/2015] [Indexed: 01/14/2023] Open
Abstract
Imperatorin has been known to exert many biological functions including anti-inflammatory activity. In this study, we investigated the inhibitory effects of imperatorin on the production of inflammatory mediators in mouse bone marrow-derived mast cells (BMMC). Imperatorin inhibited degranulation and the generation of eicosanoids (leukotriene C4 (LTC4) and prostaglandin D2 (PGD2)) in IgE/antigen (Ag)-stimulated BMMC. To elucidate the molecular mechanism involved in this process, we investigated the effect of imperatorin on intracellular signaling in BMMC. Biochemical analyses of the IgE/Ag-mediated signaling pathway demonstrated that imperatorin dramatically attenuated degranulation and the production of 5-lipoxygenase-dependent LTC4 and cyclooxygenase-2-dependent PGD2 through the inhibition of intracellular calcium influx/phospholipase Cγ1, cytosolic phospholipase A2/mitogen-activated protein kinases and/or nuclear factor-κB pathways in BMMC. These results suggest that the effects of imperatorin on inhibition of degranulation and eicosanoid generation through the suppression of multiple steps of IgE/Ag-mediated signaling pathways would be beneficial for the prevention of allergic inflammation.
Collapse
Affiliation(s)
- Kyu-Tae Jeong
- Research and Development Division, Korea Promotion Institute for Traditional Medicine Industry, Gyeongsan 712-210
| | - Eujin Lee
- Research and Development Division, Korea Promotion Institute for Traditional Medicine Industry, Gyeongsan 712-210
| | - Na-Young Park
- Research and Development Division, Korea Promotion Institute for Traditional Medicine Industry, Gyeongsan 712-210
| | - Sun-Gun Kim
- Research and Development Division, Korea Promotion Institute for Traditional Medicine Industry, Gyeongsan 712-210
| | - Hyo-Hyun Park
- Research and Development Division, Korea Promotion Institute for Traditional Medicine Industry, Gyeongsan 712-210
| | - Jiean Lee
- R&D Center, Morechem Co., Ltd, Yongin 446-908
| | - Youn Ju Lee
- School of Medicine, Catholic University of Daegu, Daegu 705-718, Republic of Korea
| | - Eunkyung Lee
- Research and Development Division, Korea Promotion Institute for Traditional Medicine Industry, Gyeongsan 712-210
| |
Collapse
|
4
|
Li X, Yang JH, Jin Y, Jin F, Kim DY, Chang JH, Kim JA, Son JK, Moon TC, Son KH, Chang HW. 15,16-Dihydrotanshinone I suppresses IgE-Ag stimulated mouse bone marrow-derived mast cell activation by inhibiting Syk kinase. JOURNAL OF ETHNOPHARMACOLOGY 2015; 169:138-144. [PMID: 25917838 DOI: 10.1016/j.jep.2015.04.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Revised: 04/13/2015] [Accepted: 04/14/2015] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE 15,16-Dihydrotanshinone I (DHT-I), isolated from the dried root of Salvia miltiorrhiza Bung, which is traditionally used to treat cardiovascular and inflammatory diseases agent in Chinese medicine. DHT-I has been reported to have a broad range of biological activities, including antibacterial activity, and has been used to treat circulatory disorders, hepatitis, inflammation, cancer, and neurodegenerative diseases. AIM OF THE STUDY The aim of this study was to evaluate the anti-allergic inflammatory effects of DHT-I on degranulation and on the generation of eicosanoids, such as, prostaglandin D2 (PGD2) and leukotriene C4 (LTC4), in IgE/Ag-stimulated bone marrow-derived mast cells (BMMCs). MATERIALS AND METHODS The anti-allergic inflammatory activity of DHT-I was evaluated using BMMCs. The effects of DHT-I on mast cell activation were investigated by following degranulation and eicosanoid generation using ELISA and immunoblotting and immunoprecipitation techniques. RESULTS DHT-I at a concentration of 20μM markedly inhibited degranulation and the generation of PGD2 and LTC4 in IgE/Ag-stimulated BMMCs (about 90% inhibitions, respectively). Analyses of FcεRI-mediated signaling pathways demonstrated that DHT-I inhibited the phosphorylations of spleen tyrosine kinase (Syk) and linker for activation of T cells (LAT), and inhibited downstream signaling process, including [Ca(2+)]i mobilization induced by the phosphorylation of phospholipase Cγ1 (PLCγ1), and the activations of mitogen-activated protein kinases (MAPKs) and the Akt-nuclear factor-κB (NF-κB) pathway. CONCLUSIONS DHT-1 inhibits the release of allergic inflammatory mediators from IgE/Ag-stimulated mast cells by suppressing a FcεRI-mediated Syk-dependent signal pathway. This result suggests DHT-I offers a novel developmental basis for drugs targeting allergic inflammatory diseases.
Collapse
Affiliation(s)
- Xian Li
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749, Republic of Korea
| | - Ju Hye Yang
- Korea Medicine-Based Herbal Drug Development Group, Korea Institute of Oriental Medicine, Daejeon 305-811, Republic of Korea
| | - Ye Jin
- Yanbian University Hospital, Yanji, Jilin Province, China
| | - Fansi Jin
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749, Republic of Korea
| | - Dong-Young Kim
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749, Republic of Korea
| | - Jae-Hoon Chang
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749, Republic of Korea
| | - Jung-Ae Kim
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749, Republic of Korea
| | - Jong-Keun Son
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749, Republic of Korea
| | - Tae Chul Moon
- Pulmonary Research Group, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada T6G 2S2
| | - Kun Ho Son
- Department of Food Science and Nutrition, Andong National University, Andong 760-749, Republic of Korea.
| | - Hyeun Wook Chang
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749, Republic of Korea.
| |
Collapse
|
5
|
Ryu HS, Lee HK, Kim JS, Kim YG, Pyo M, Yun J, Hwang BY, Hong JT, Kim Y, Han SB. Saucerneol D inhibits dendritic cell activation by inducing heme oxygenase-1, but not by directly inhibiting toll-like receptor 4 signaling. JOURNAL OF ETHNOPHARMACOLOGY 2015; 166:92-101. [PMID: 25792017 DOI: 10.1016/j.jep.2015.03.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 02/17/2015] [Accepted: 03/08/2015] [Indexed: 06/04/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Saururus chinensis is a medicinal plant used to treat jaundice, pneumonia, edema, fever, and several inflammatory diseases. Saucerneol D (SD), a lignan constituent of this plant, has antioxidant, anti-asthmatic, and anti-inflammatory activities. SD has been previously reported to inhibit the pro-inflammatory responses of RAW264.7 cells and primary mast cells. In this study, we investigated the effect of SD on the functions of dendritic cells (DCs). MATERIALS AND METHODS SD was isolated from methanol extract of the roots of S. chinensis. Bone marrow-derived DCs were used as target cells. The effects of SD on the following DC functions were examined: surface molecule expression, cytokine expression, migration, allogenic T cell activation, heme oxygenase-1 expression, and Toll-like receptor 4 signaling. RESULTS In lipopolysaccharide (LPS)-treated DCs, SD inhibited the expression of cell surface molecules (MHC I/II, CD40, CD80, and CD86), the production of inflammatory mediators (nitric oxide, IL-12, IL-1β, and TNF-α), and allogenic T cell activation capacity. SD also inhibited DC migration toward MIP-3β by down-regulating CCR7 expression. SD attenuated LPS-induced activation of NF-κB and MAPK signaling in DCs, but did not directly inhibit kinase activities of IRAK1, IRAK4, TAK1, or IKKβ in enzymatic assays. SD did not inhibit LPS binding to myeloid differentiation protein-2, co-receptor of TLR4. SD increased the production of reactive oxygen species, Nrf-2, and heme oxygenase (HO)-1, which degrades the heme to immunosuppressive carbon monoxide and biliverdin, which may underlie the anti-inflammatory effects in SD-treated DCs. CONCLUSIONS Taken together, these data suggest that SD suppresses LPS-induced activation of DCs through the induction of HO-1, but not by directly affecting Toll-like receptor 4 signaling.
Collapse
Affiliation(s)
- Hwa Sun Ryu
- College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 362-763, South Korea
| | - Hong Kyung Lee
- College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 362-763, South Korea
| | - Ji Sung Kim
- College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 362-763, South Korea
| | - Yong Guk Kim
- College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 362-763, South Korea
| | - Minji Pyo
- College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 362-763, South Korea
| | - Jieun Yun
- Korea Research Institute of Bioscience and Biotechnology, Ochang, Chungbuk 363-883, South Korea
| | - Bang Yeon Hwang
- College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 362-763, South Korea
| | - Jin Tae Hong
- College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 362-763, South Korea
| | - Youngsoo Kim
- College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 362-763, South Korea
| | - Sang-Bae Han
- College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 362-763, South Korea.
| |
Collapse
|
6
|
Kim BW, Koppula S, Park SY, Hwang JW, Park PJ, Lim JH, Choi DK. Attenuation of inflammatory-mediated neurotoxicity by Saururus chinensis extract in LPS-induced BV-2 microglia cells via regulation of NF-κB signaling and anti-oxidant properties. Altern Ther Health Med 2014; 14:502. [PMID: 25514974 PMCID: PMC4301828 DOI: 10.1186/1472-6882-14-502] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 09/19/2014] [Indexed: 01/16/2023]
Abstract
Background A Saururus chinensis Baill (SC) has been used by Native Americans, early colonists and practitioners of Korean traditional medicine for treating several diseases including cancer, rheumatoid arthritis and edema. The objective of this study was to evaluate the effects of SC extract in lipopolysaccharide (LPS)-stimulated neuroinflammatory responses in BV-2 microglial cells. Methods The effects of SC on the LPS–induced neuroinflammatory responses in BV-2 microglial cells were assessed by Western blotting, RT-PCR and immunofluorescence labeling techniques. DPPH and alkyl radical scavenging assay was performed to evaluate the anti-oxidant effects. Comparisons between groups were analyzed using one-way analysis of variance followed by Dunnett’s multiple comparisons test using GraphPad Prism V5.01 software. Results Pre-treatment with SC extract (1, 5 and 10 μg/mL) significantly (p < 0.001 at 10 μg/mL) and concentration dependently inhibited LPS-induced production of nitric oxide (NO), inducible NO synthase (iNOS), cyclooxygenase-2 (COX-2) and suppressed the inflammatory cytokine levels such as tumor necrosis factor-alpha and interleukin (IL)-6 in BV-2 microglial cells (p < 0.001 at 10 μg/mL). Further, SC suppressed the nuclear factor-kappa B (NF-κB) activation by blocking the degradation of IκB-α. SC also exhibited profound anti-oxidant effects by scavenging 1, 1-diphenyl-2-picrylhydrazyl (DPPH) (IC50: 0.055 mg/mL) and alkyl radicals (IC50: 0.349 mg/mL). High performance liquid chromatography finger printing analysis of SC revealed quercetin (QCT) as one of the major constituents compared with reference standard. QCT also inhibited the excessive release of NO, and inhibited the increased expressional levels of IL-6, iNOS and COX-2 in LPS-stimulated BV-2 cells. Conclusions Our results indicated that SC inhibited the LPS-stimulated neuroinflammatory responses in BV-2 microglia via regulation of NF-κB signaling. The antioxidant active constituents of SC might be partly involved in delivering such effects. Based on the traditional claims and our present results SC can be potentially used in treating inflammatory-mediated neurodegenerative diseases.
Collapse
|
7
|
Lu Y, Li X, Park YN, Kwon O, Piao D, Chang YC, Kim CH, Lee E, Son JK, Chang HW. Britanin Suppresses IgE/Ag-Induced Mast Cell Activation by Inhibiting the Syk Pathway. Biomol Ther (Seoul) 2014; 22:193-9. [PMID: 25009699 PMCID: PMC4060075 DOI: 10.4062/biomolther.2014.038] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 05/01/2014] [Accepted: 05/07/2014] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to determine whether britanin, isolated from the flowers of Inula japonica (Inulae Flos), modulates the generation of allergic inflammatory mediators in activated mast cells. To understand the biological activity of britanin, the authors investigated its effects on the generation of prostaglandin D2 (PGD2), leukotriene C4 (LTC4), and degranulation in IgE/Ag-induced bone marrow-derived mast cells (BMMCs). Britanin dose dependently inhibited degranulation and the generations of PGD2 and LTC4 in BMMCs. Biochemical analyses of IgE/Ag-mediated signaling pathways demonstrated that britanin suppressed the phosphorylation of Syk kinase and multiple downstream signaling processes, including phospholipase Cγ1 (PLCγ1)-mediated calcium influx, the activation of mitogen-activated protein kinases (MAPKs; extracellular signal-regulated kinase 1/2, c-Jun NH2-terminal kinase and p38), and the nuclear factor-κB (NF-κB) pathway. Taken together, the findings of this study suggest britanin suppresses degranulation and eicosanoid generation by inhibiting the Syk-dependent pathway and britanin might be useful for the treatment of allergic inflammatory diseases.
Collapse
Affiliation(s)
- Yue Lu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China ; College of Pharmacy, Yeungnam University, Gyeongsan 712-749
| | - Xian Li
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749
| | - Young Na Park
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749
| | - Okyun Kwon
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749
| | - Donggen Piao
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749
| | - Young-Chae Chang
- Department of Pathology, Catholic University of Daegu School of Medicine, Daegu 705-718
| | - Cheorl-Ho Kim
- Department of Biological Science, Sungkyunkwan University, Suwon 440-746
| | - Eunkyung Lee
- Research and Development Division, Korean Promotion Institute for Traditional Medicine Industry, Gyeongsan 712-210, Republic of Korea
| | - Jong Keun Son
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749
| | | |
Collapse
|
8
|
Yamauchi S, Kawahara S, Wukirsari T, Nishiwaki H, Nishi K, Sugahara T, Akiyama K, Kishida T. Structure-cytotoxic activity relationship of sesquilignan, morinol A. Bioorg Med Chem Lett 2013; 23:4923-30. [PMID: 23896495 DOI: 10.1016/j.bmcl.2013.06.067] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 06/17/2013] [Accepted: 06/22/2013] [Indexed: 11/16/2022]
Abstract
The cytotoxic activities of sesquilignans, (7S,8S,7'R,8'R)- and (7R,8R,7'S,8'S)-morinol A and (7S,8S,7'S,8'S)- and (7R,8R,7'R,8'R)-morinol B were compared, showing no significant difference between stereoisomers (IC50=24-35 μM). As a next stage, the effect of substituents at 7, 7', and 7"-aromatic ring on the activity was evaluated to find out the higher activity of (7S,8S,7'R,8'R)-7,7',7"-phenyl derivative 18 (IC50=6-7 μM). In the research on the structure-activity relationship of 7"-position of (7S,8S,7'R,8'R)-7,7',7"-phenyl derivative 18, the most potent compounds were 7,7',7"-phenyl derivative 18 (IC50=6 μM) against HeLa cells. Against HL-60 cells, 7"-(4-nitrophenyl)-7,7'-phenyl derivative 33 and 7"-hexyl-7,7'-phenyl derivative 37 (IC50=5 μM) showed highest activity. We discovered the compounds showed four to sevenfold potent activity than that of natural (7S,8S,7'R,8'R)-morinol A. It was also confirmed that the 7'-benzylic hydroxy group have an important role for exhibiting activity, on the other hand, the resonance system of cinnamyl structure is not crucial for the potent activity.
Collapse
Affiliation(s)
- Satoshi Yamauchi
- Faculty of Agriculture, Ehime University, 3-5-7 Tarumi, Matsuyama, Ehime 790-8566, Japan.
| | | | | | | | | | | | | | | |
Collapse
|