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Lim HJ, Prajapati R, Seong SH, Jung HA, Choi JS. Antioxidant and Antineuroinflammatory Mechanisms of Kaempferol-3- O-β-d-Glucuronate on Lipopolysaccharide-Stimulated BV2 Microglial Cells through the Nrf2/HO-1 Signaling Cascade and MAPK/NF-κB Pathway. ACS OMEGA 2023; 8:6538-6549. [PMID: 36844518 PMCID: PMC9948190 DOI: 10.1021/acsomega.2c06916] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
Aglycone- and glycoside-derived forms of flavonoids exist broadly in plants and foods such as fruits, vegetables, and peanuts. However, most studies focus on the bioavailability of flavonoid aglycone rather than its glycosylated form. Kaempferol-3-O-β-d-glucuronate (K3G) is a natural flavonoid glycoside obtained from various plants that have several biological activities, including antioxidant and anti-inflammatory effects. However, the molecular mechanism related to the antioxidant and antineuroinflammatory activity of K3G has not yet been demonstrated. The present study was designed to demonstrate the antioxidant and antineuroinflammatory effect of K3G against lipopolysaccharide (LPS)-stimulated BV2 microglial cells and to evaluate the underlying mechanism. Cell viability was determined by MTT assay. The inhibition rate of reactive oxygen species (ROS) and the production of pro-inflammatory mediators and cytokines were measured by DCF-DA assay, Griess assay, enzyme-linked immunosorbent assay (ELISA), and western blotting. K3G inhibited the LPS-induced release of nitric oxide, interleukin (IL)-6, and tumor necrosis factor-α (TNF-α) as well as the expression of prostaglandin E synthase 2. Additionally, K3G reduced the expression of inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), and nuclear factor-kappa B (NF-κB) related proteins. Mechanistic studies found that K3G downregulated phosphorylated mitogen-activated protein kinases (MAPKs) and upregulated the Nrf2/HO-1 signaling cascade. In this study, we demonstrated the effects of K3G on antineuroinflammation by inactivating phosphorylation of MPAKs and on antioxidants by upregulating the Nrf2/HO-1 signaling pathway through decreasing ROS in LPS-stimulated BV2 cells.
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Affiliation(s)
- Hyun Jung Lim
- Institute
of Fisheries Sciences, Pukyong National
University, Busan 46041, Republic of Korea
| | - Ritu Prajapati
- Department
of Food and Life Science, Pukyong National
University, Busan 48513, Republic of Korea
| | - Su Hui Seong
- Division
of Natural Products Research, Honam National
Institute of Biological Resource, Mokpo 58762, Republic
of Korea
| | - Hyun Ah Jung
- Department
of Food Science and Human Nutrition, Jeonbuk
National University, Jeonju 54896, Republic of Korea
| | - Jae Sue Choi
- Institute
of Fisheries Sciences, Pukyong National
University, Busan 46041, Republic of Korea
- Department
of Food and Life Science, Pukyong National
University, Busan 48513, Republic of Korea
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V M, M J. Total accepted phenolic, tannin, triterpenoid, flavonoid and sterol contents, anti-diabetic, anti-inflammatory and cytotoxic activities of Tectaria paradoxa (Fee.) Sledge. Toxicol Rep 2020; 7:1465-1468. [PMID: 33194558 PMCID: PMC7645413 DOI: 10.1016/j.toxrep.2020.10.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 10/11/2020] [Accepted: 10/16/2020] [Indexed: 02/07/2023] Open
Abstract
The results of the present study revealed the phytochemical composition and bio potentials of Tectaria paradoxa (Fee.) Sledge. The extracts of T. paradoxa demonstrated dose dependent anti-inflammatory, anti-diabetic and cytotoxic activities. The anti-inflammatory activity of the Tectarai paradoxa were as follows methanol > chloroform > acetone > petroleum ether. The anti-diabetic properties of the Tectarai paradoxa were as follows methanol > acetone > chloroform > petroleum ether.•The cytotoxcity of the Tectarai paradoxa were as follows chloroform > petroleum ether > methanol > acetone.
The present study was aimed to reveal the phytochemical composition and bio potentials of Tectaria paradoxa (Fee.) Sledge. The total phenolic, tannin, flavonoid, terpenoids, sterols content were determined. RBC membrane stabilization against heat induced haemolysis, In-vitro Alpha-amylase inhibitory assay and Brine Shrimp lethality bioassay was performed to determine the anti-inflammatory, anti-diabetic and cytotoxic activity. Among the tested extracts, methanolic extracts of T. paradoxa showed high amount of phenolics 351.43 ± 14.5 mg GAE/g, tannin 34.38 ± 1.02 mg GAE/g, flavonoids 1384.44 ± 50.92 mg QE/g, triterpenoids 130.5 ± 2.77 mg/g and acetone extracts of T. paradoxa displayed maximum amount of sterols 3.2 ± 0.2 mg/g. The extracts of T. paradoxa demonstrated dose dependent anti-inflammatory, anti-diabetic and cytotoxic activities. The anti-inflammatory activity of the T. paradoxa were as follows methanol > chloroform > acetone > petroleum ether. The anti-diabetic properties of the T. paradoxa were as follows methanol > acetone > chloroform > petroleum ether. The cytotoxicity of the T. paradoxa were as follows chloroform (LC50 = 25.52 μg/mL) > petroleum ether (LC50 = 36.99 μg/mL) > methanol (LC50 = 44.26 μg/mL) > acetone (LC50 = 55.9 μg/mL). The existence of phenolics, tannin, flavonoids, sterols and triterpenoids may be responsible for the observed biological activities. The results of the present study identified the pool of medicinal properties existence in T. paradoxa. Further studies on the isolation of active principles may bring out an alternative source for anti-inflammatory and anti-cancer drugs from T. paradoxa.
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Affiliation(s)
- Manivannan V
- Centre for Plant Biotechnology, Department of Botany, St. Xavier's College (Autonomous), (Affiliated to Manonmanaim Sundaranar University, Tirunelveli- 627 012, Tamil Nadu, India), Palayamkottai 627 002, Tamil Nadu, India
| | - Johnson M
- Centre for Plant Biotechnology, Department of Botany, St. Xavier's College (Autonomous), (Affiliated to Manonmanaim Sundaranar University, Tirunelveli- 627 012, Tamil Nadu, India), Palayamkottai 627 002, Tamil Nadu, India
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Otuechere CA, Farombi EO. Pterocarpus mildbraedii (Harms) extract resolves propanil-induced hepatic injury via repression of inflammatory stress responses in Wistar rats. J Food Biochem 2020; 44:e13506. [PMID: 33047371 DOI: 10.1111/jfbc.13506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/16/2020] [Accepted: 09/17/2020] [Indexed: 12/12/2022]
Abstract
Pterocarpus mildbraedii (PME) is a green leafy vegetable from the Papilionaceae family. This study evaluated the anti-inflammatory activity of PME in Wistar rats exposed to experimental hepatotoxicity using propanil (PRP), a post-emergent herbicide. Animals were grouped as control, PRP, PME, and PME + PRP. After 7 days, the levels of stress-activated protein kinases/c-Jun N-terminal kinase (SAPK/JNK), p38 mitogen-activated protein kinase (p38 MAPK), and signal transducer and activator of transcription (STAT-3) were measured in rat liver. Furthermore, myeloperoxidase (MPO) and nitric oxide (NO) levels, as well as protein expressions of nuclear factor-κB (NF-κB p65), inducible nitric oxide synthase (iNOS), and cyclo-oxygenase-2 (COX-2) were determined. Compared with PRP-treated rats, PME significantly reduced the hepatic MPO and NO levels. PME also diminished NFκB, iNOS, and COX-2 protein expressions in PRP-treated rats. This study showed that Pterocarpus mildbraedii leaves produce active principles with relevant anti-inflammatory potential. PRACTICAL APPLICATIONS: Previous studies have shown that bioactive principles contained in medicinal plants can offer protection against chemically induced inflammation. Pterocarpus mildbraedii leaves, with rich content of polyphenols, flavonoids, and essential fatty acids, could be exploited as a therapeutic agent against pesticide-induced oxidative stress and inflammation. This current study has also shown that the potential of PME as a functional food is boosted by the presence of α-linolenic acid, an omega-3-fatty acid known to possess anti-inflammatory activity. Here, we elucidated the cellular mechanisms of the anti-inflammatory action of PME.
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Affiliation(s)
- Chiagoziem Anariochi Otuechere
- Department of Biochemistry, Faculty of Basic Medical Sciences, Redeemer's University, Ede, Nigeria.,Department of Biochemistry, Faculty of Basic Medical Sciences, University of Ibadan, Ibadan, Nigeria
| | - Ebenezer Olatunde Farombi
- Department of Biochemistry, Faculty of Basic Medical Sciences, University of Ibadan, Ibadan, Nigeria
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Wang W, Yang R, Chen H, Wu Y, Lin S, Yuan S, Pan W, Jia AQ. Chemical Constituents of Smilax riparia and their Tumoral Cytotoxicities. Chem Nat Compd 2020. [DOI: 10.1007/s10600-020-02994-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Roy A, Park HJ, Abdul QA, Jung HA, Choi JS. Pulegone Exhibits Anti-inflammatory Activities through the Regulation of NF-κB and Nrf-2 Signaling Pathways in LPS-stimulated RAW 264.7 cells. ACTA ACUST UNITED AC 2018. [DOI: 10.20307/nps.2018.24.1.28] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anupom Roy
- Department of Food and Life Science, Pukyong National University, Busan 608-737, Republic of Korea
| | - Hee-Juhn Park
- Department of Pharmaceutical Engineering, Sangji University, Wonju 220-702, Republic of Korea
| | - Qudeer Ahmed Abdul
- Department of Food and Life Science, Pukyong National University, Busan 608-737, Republic of Korea
| | - Hyun Ah Jung
- Department of Food Science and Human Nutrition, Chonbuk National University, Jeonju 561-756, Republic of Korea
| | - Jae Sue Choi
- Department of Food and Life Science, Pukyong National University, Busan 608-737, Republic of Korea
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Jung HA, Roy A, Abdul QA, Kim HR, Park HJ, Choi JS. Luteolin 5-O-glucoside from Korean Milk Thistle,Cirsium maackii, Exhibits Anti-Inflammatory Activity via Activation of the Nrf2/HO-1 Pathway. ACTA ACUST UNITED AC 2017. [DOI: 10.20307/nps.2017.23.3.183] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hyun Ah Jung
- Department of Food Science and Human Nutrition, Chonbuk National University, Jeonju 54896, Republic of Korea
| | - Anupom Roy
- Department of Food and Life Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Qudeer Ahmed Abdul
- Department of Food and Life Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Hyeung Rak Kim
- Department of Food and Life Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Hee Juhn Park
- Department of Pharmaceutical Engineering, Sangji University, Wonju 220-702, Republic of Korea
| | - Jae Sue Choi
- Department of Food and Life Science, Pukyong National University, Busan 48513, Republic of Korea
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Kalaiselvan S, Rasool MK. Triphala herbal extract suppresses inflammatory responses in LPS-stimulated RAW 264.7 macrophages and adjuvant-induced arthritic rats via inhibition of NF-κB pathway. J Immunotoxicol 2016; 13:509-25. [DOI: 10.3109/1547691x.2015.1136010] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- Sowmiya Kalaiselvan
- Immunopathology Lab, School of Bio Sciences and Technology, VIT University, Vellore, India
| | - Mahaboob Khan Rasool
- Immunopathology Lab, School of Bio Sciences and Technology, VIT University, Vellore, India
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The Anti-Inflammatory Effects and Mechanisms of Eupafolin in Lipopolysaccharide-Induced Inflammatory Responses in RAW264.7 Macrophages. PLoS One 2016; 11:e0158662. [PMID: 27414646 PMCID: PMC4945065 DOI: 10.1371/journal.pone.0158662] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 06/20/2016] [Indexed: 12/22/2022] Open
Abstract
Eupafolin is a flavone isolated from Artemisia princeps Pampanini (family Asteraceae). The aim of this study was to examine the anti-inflammatory effects of eupafolin in lipopolysaccharide (LPS)-treated RAW264.7 macrophages and LPS-induced mouse skin and lung inflammation models and to identify the mechanism underlying these effects. Eupafolin decreased the LPS-induced release of inflammatory mediators (iNOS, COX-2 and NO) and proinflammatory cytokines (IL-6 and TNF-α) from the RAW264.7 macrophages. Eupafolin inhibited the LPS-induced phosphorylation of p38 MAPK, ERK1/2, JNK, AKT and p65 and the nuclear translocation of p65 and c-fos. These effects were mainly mediated by the inhibition of JNK. In the mouse paw and lung models, eupafolin effectively suppressed the LPS-induced edema formation and down-regulated iNOS and COX-2 expression. These results demonstrated that eupafolin exhibits anti-inflammatory properties and suggested that eupafolin can be developed as an anti-inflammatory agent.
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Noufou O, Andre T, Richard SW, Yerbanga S, Maminata T, Ouedraogo S, Anne EH, Irene G, Pierre GI. Anti-inflammatory and Anti-plasmodial Activities of Methanol Extract of Pterocarpus erinaceus Poir. (Fabaceae) Leaves. INT J PHARMACOL 2016. [DOI: 10.3923/ijp.2016.549.555] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Raina P, M. D, C.V. C, Agarwal A, Wagh N, Kaul-Ghanekar R. Comparative analysis of anti-inflammatory activity of aqueous and methanolic extracts of Ocimum basilicum (basil) in RAW264.7, SW1353 and human primary chondrocytes in respect of the management of osteoarthritis. J Herb Med 2016. [DOI: 10.1016/j.hermed.2016.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Gallic Acid-g-Chitosan Modulates Inflammatory Responses in LPS-Stimulated RAW264.7 Cells Via NF-κB, AP-1, and MAPK Pathways. Inflammation 2015; 39:366-374. [DOI: 10.1007/s10753-015-0258-2] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Demarchi IG, Thomazella MV, de Souza Terron M, Lopes L, Gazim ZC, Cortez DAG, Donatti L, Aristides SMA, Silveira TGV, Lonardoni MVC. Antileishmanial activity of essential oil and 6,7-dehydroroyleanone isolated from Tetradenia riparia. Exp Parasitol 2015; 157:128-37. [PMID: 26116864 DOI: 10.1016/j.exppara.2015.06.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 06/15/2015] [Accepted: 06/22/2015] [Indexed: 10/23/2022]
Abstract
Tetradenia riparia plant is used as a traditional medicine in Africa for the treatment of inflammatory and infectious diseases as like parasitic. Therapy for leishmaniasis caused by Leishmania (Leishmania) amazonensis specie often fails, and the conventional drugs are toxic, expensive, require a long period of treatment, and adverse effects are common. The alternative therapies using natural products are inexpensive and have few or any adverse reaction. These reasons are sufficient to investigate the new natural therapeutic for leishmaniasis. We evaluated the potential of the essential oil (TrEO) and 6,7-dehydroroyleanone (TrROY) isolated from T. riparia on L. (L.) amazonensis promastigote and amastigote forms, cytotoxicity on human erythrocytes and murine macrophages, nitric production and inducible nitric oxide synthase (iNOS) mRNA expression. TrEO was the most effective to promote the Leishmania promastigote death. After 72 h incubation, the lethal dose of TrEO and TrROY that promoted 50% Leishmania death (LD50) were 0.8 μg/mL and 3 μg/mL, respectively. TrEO and TrROY were not cytotoxic to human erythrocytes, but TrROY was toxic to murine macrophages resulting in a low selectivity index. The transmission electronic microscopy showed that TrEO (0.03 μg/mL) was able to modify the promastigote ultrastructures suggesting autophagy as chromatin condensation, blebbing, membranous profiles and nuclear fragmentation. Infected-macrophages treated with TrEO (0.03 μg/mL) or TrROY (10 μg/mL) had an infection index decreased in 65 and 48%. TrEO did not induce iNOS mRNA expression or nitrite production in macrophages infected with Leishmania. TrROY and mainly TrEO promoted the Leishmania death, and TrROY showed loss toxicity to erythrocytes cells. Other compounds derived from T. riparia and the essential oil could be explored to develop a new alternative treatment for leishmaniasis.
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Affiliation(s)
| | | | - Mariana de Souza Terron
- Laboratório de Imunologia Clínica da Universidade Estadual de Maringá, Maringá, Paraná, Brazil
| | - Lilian Lopes
- Laboratório de Imunologia Clínica da Universidade Estadual de Maringá, Maringá, Paraná, Brazil
| | - Zilda Cristiani Gazim
- Laboratório de Química de Produtos Naturais da Universidade Paranaense, Umuarama, Paraná, Brazil
| | | | - Lucélia Donatti
- Laboratório de Biologia Adaptativa, Departamento de Biologia Celular, Universidade Federal do Paraná, Curitiba, Brazil
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Mansara P, Ketkar M, Deshpande R, Chaudhary A, Shinde K, Kaul-Ghanekar R. Improved antioxidant status by omega-3 fatty acid supplementation in breast cancer patients undergoing chemotherapy: a case series. J Med Case Rep 2015; 9:148. [PMID: 26104023 PMCID: PMC4486087 DOI: 10.1186/s13256-015-0619-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 05/22/2015] [Indexed: 12/28/2022] Open
Abstract
Introduction Breast cancer is the second leading cause of cancer death in women worldwide and the third most common cancer in India. Various studies have reported that chemotherapy reduces the antioxidant status in patients with cancer. A diet rich in omega-3 fatty acids has been shown to offer protection against breast cancer through various mechanisms. However, there are no reports suggesting a relationship between consumption of omega-3 fatty acids during chemotherapy and antioxidant status in patients with breast cancer. Thus, the objective of this study was to evaluate whether fish oil supplementation could improve the antioxidant status of five women with breast cancer undergoing chemotherapy. Case presentation We report on the cases of five Indian women with breast cancer, in the age group of 34 to 60 years, who had poorly differentiated breast carcinoma and underwent modified radical mastectomy. Postsurgery, the patients were given fish oil capsules containing eicosapentaenoic acid (180mg) and docosahexaenoic acid (120mg)/capsule during their chemotherapy. Informed consent was obtained from each participant and they were followed-up to the completion of six chemotherapy cycles at 21-day intervals. Conclusions The supplementation of fish oil significantly (p < 0.01) increased superoxide dismutases, glutathione reductase and catalase activity in red blood cells as well as the total plasma antioxidant status in the patients. This approach of using omega-3 fatty acids as an adjuvant treatment for breast cancer may help oncologists to manage the side effects of ongoing chemotherapy by improving the antioxidant status in patients.
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Affiliation(s)
- Prakash Mansara
- Interactive Research School for Health Affairs (IRSHA), Bharati Vidyapeeth Deemed University, Katraj-Dhankawadi, Pune, 411043, Maharashtra, India.
| | - Mrunal Ketkar
- Department of Surgery, Bharati Vidyapeeth Hospital and Research Centre (BVHRC), Pune, 411043, India.
| | - Rashmi Deshpande
- Interactive Research School for Health Affairs (IRSHA), Bharati Vidyapeeth Deemed University, Katraj-Dhankawadi, Pune, 411043, Maharashtra, India.
| | - Amol Chaudhary
- Interactive Research School for Health Affairs (IRSHA), Bharati Vidyapeeth Deemed University, Katraj-Dhankawadi, Pune, 411043, Maharashtra, India.
| | - Kavita Shinde
- Interactive Research School for Health Affairs (IRSHA), Bharati Vidyapeeth Deemed University, Katraj-Dhankawadi, Pune, 411043, Maharashtra, India.
| | - Ruchika Kaul-Ghanekar
- Interactive Research School for Health Affairs (IRSHA), Bharati Vidyapeeth Deemed University, Katraj-Dhankawadi, Pune, 411043, Maharashtra, India.
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Abarikwu SO. Kolaviron, a natural flavonoid from the seeds of Garcinia kola, reduces LPS-induced inflammation in macrophages by combined inhibition of IL-6 secretion, and inflammatory transcription factors, ERK1/2, NF-κB, p38, Akt, p-c-JUN and JNK. Biochim Biophys Acta Gen Subj 2014; 1840:2373-81. [PMID: 24650887 DOI: 10.1016/j.bbagen.2014.03.006] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 02/22/2014] [Accepted: 03/06/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND Kolaviron (Kol-v), an important component of Garcinia kola seed has a variety of biologic activities, including anti-inflammatory properties. METHODS We tested the ability of Kol-v to block signalling pathways implicated in lipopolysaccharide (LPS)-induced inflammatory gene expression in RAW 264.7 macrophage cell line. RESULTS When macrophages pre-treated with Kol-v (15 and 25μM) were activated with LPS, phosphorylation of p38 and p-c-JUN but not IκBα degradation and phosphorylation of NF-κB (p65), ERK1/2, and IκBα were blocked. Furthermore, Kol-v suppressed LPS-induced increase in the expression of IL-18 gene and LPS-induced decrease in the mRNA expression of IP-10 but it had no effect on the LPS-induced decrease in the gene expression levels of IL-1α, IL-33, IL-1β, and IFNβ1-1. When macrophages pre-treated with Kol-v (50 and 100μM) were activated with LPS, phosphorylation of Akt, ERK1/2, IκBα, and NFκB (p65) but not that of CREB was blocked by Kol-v. The protective effect of Kol-v on the LPS-induced phosphorylation of the mitogen activated protein kinase (MAPK) family member JNK was only observed at 100μM. At all concentrations of Kol-v (0-100μM) tested in this study, there was no effect of Kol-v on LPS-induced secretion of the pro-inflammatory cytokine TNF-α but a concentration dependent inhibition of Kol-v on IL-6 secretion was observed. CONCLUSION Kol-v interferes with LPS signalling by reducing the activation of several inflammatory transcription factors and that its inhibitory action on IL-6 secretion correlates with inhibition of ERK1/2, p38, Akt, p-c-JUN and JNK signalling pathways. GENERAL SIGNIFICANCE The anti-inflammatory potential of Kol-v via inhibition of IL-6 secretion in RAW macrophage was established in this study.
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Affiliation(s)
- Sunny O Abarikwu
- Department of Chemical Sciences, College of Natural Sciences, Redeemer's University, Redemption City, Ogun State, Nigeria.
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