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Yu T, Rhee MH, Lee J, Kim SH, Yang Y, Kim HG, Kim Y, Kim C, Kwak YS, Kim JH, Cho JY. Ginsenoside Rc from Korean Red Ginseng (Panax ginseng C.A. Meyer) Attenuates Inflammatory Symptoms of Gastritis, Hepatitis and Arthritis. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2016; 44:595-615. [DOI: 10.1142/s0192415x16500336] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Korean Red Ginseng (KRG) is an herbal medicine prescribed worldwide that is prepared from Panax ginseng C.A. Meyer (Araliaceae). Out of ginseng’s various components, ginsenosides are regarded as the major ingredients, exhibiting anticancer and anti-inflammatory activities. Although recent studies have focused on understanding the anti-inflammatory activities of KRG, compounds that are major anti-inflammatory components, precisely how these can suppress various inflammatory processes has not been fully elucidated yet. In this study, we aimed to identify inhibitory saponins, to evaluate the in vivo efficacy of the saponins, and to understand the inhibitory mechanisms. To do this, we employed in vitro lipopolysaccharide-treated macrophages and in vivo inflammatory mouse conditions, such as collagen (type II)-induced arthritis (CIA), EtOH/HCl-induced gastritis, and lipopolysaccharide (LPS)/D-galactosamine (D-GalN)-triggered hepatitis. Molecular mechanisms were also verified by real-time PCR, immunoblotting analysis, and reporter gene assays. Out of all the ginsenosides, ginsenoside Rc (G-Rc) showed the highest inhibitory activity against the expression of tumor necrosis factor (TNF)-[Formula: see text], interleukin (IL)-1[Formula: see text], and interferons (IFNs). Similarly, this compound attenuated inflammatory symptoms in CIA, EtOH/HCl-mediated gastritis, and LPS/D-galactosamine (D-GalN)-triggered hepatitis without altering toxicological parameters, and without inducing gastric irritation. These anti-inflammatory effects were accompanied by the suppression of TNF-[Formula: see text] and IL-6 production and the induction of anti-inflammatory cytokine IL-10 in mice with CIA. G-Rc also attenuated the increased levels of luciferase activity by IRF-3 and AP-1 but not NF-[Formula: see text]B. In support of this phenomenon, G-Rc reduced TBK1, IRF-3, and ATF2 phosphorylation in the joint and liver tissues of mice with hepatitis. Therefore, our results strongly suggest that G-Rc may be a major component of KRG with useful anti-inflammatory properties due to its suppression of IRF-3 and AP-1 pathways.
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Affiliation(s)
- Tao Yu
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Medical College, Qingdao University, Qingdao 266021, P. R. China
| | - Man Hee Rhee
- College of Veterinary Medicine, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Jongsung Lee
- Department of Genetic Engineering, Sungkyunkwan University, 2066 Seobu-ro Jangan-gu, Suwon 16419, Republic of Korea
| | - Seung Hyung Kim
- Institute of Traditional Medicine and Bioscience, Daejeon University, Daejeon 34520, Republic of Korea
| | - Yanyan Yang
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Medical College, Qingdao University, Qingdao 266021, P. R. China
| | - Han Gyung Kim
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Yong Kim
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Chaekyun Kim
- Department of Pharmacology, Inha University School of Medicine, Incheon 22212, Republic of Korea
| | - Yi-Seong Kwak
- Korean Ginseng Corporation, Central Research Institute, Daejeon 34337, Republic of Korea
| | - Jong-Hoon Kim
- Department of Veterinary Physiology, College of Veterinary Medicine, Chonbuk National University, Iksan 54596, Republic of Korea
| | - Jae Youl Cho
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
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Hossen MJ, Kim MY, Cho JY. MAPK/AP-1-Targeted Anti-Inflammatory Activities of Xanthium strumarium. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2016; 44:1111-1125. [DOI: 10.1142/s0192415x16500622] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Xanthium strumarium L. (Asteraceae), a traditional Chinese medicine, is prescribed to treat arthritis, bronchitis, and rhinitis. Although the plant has been used for many years, the mechanism by which it ameliorates various inflammatory diseases is not yet fully understood. To explore the anti-inflammatory mechanism of methanol extracts of X. strumarium (Xs-ME) and its therapeutic potential, we used lipopolysaccharide (LPS)-stimulated murine macrophage-like RAW264.7 cells and human monocyte-like U937 cells as well as a LPS/D-galactosamine (GalN)-induced acute hepatitis mouse model. To find the target inflammatory pathway, we used holistic immunoblotting analysis, reporter gene assays, and mRNA analysis. Xs-ME significantly suppressed the up-regulation of both the activator protein (AP)-1-mediated luciferase activity and the production of LPS-induced proinflammatory cytokines, including interleukin (IL)-1[Formula: see text], IL-6, and tumor necrosis factor (TNF)-[Formula: see text]. Moreover, Xs-ME strongly inhibited the phosphorylation of mitogen-activated protein kinase (MAPK) in LPS-stimulated RAW264.7 and U937 cells. Additionally, these results highlighted the hepatoprotective and curative effects of Xs-ME in a mouse model of LPS/D-GalN-induced acute liver injury, as assessed by elevated serum levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT), and histological damage. Therefore, our results strongly suggest that the ethnopharmacological roles of Xs-ME in hepatitis and other inflammatory diseases might result from its inhibitory activities on the inflammatory signaling of MAPK and AP-1.
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Affiliation(s)
- Muhammad Jahangir Hossen
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Department of Animal Science, Patuakhali Science and Technology University, Patuakhali 8602, Bangladesh
| | - Mi-Yeon Kim
- School of Systems Biomedical Science, Soongsil University, Seoul 06978, Republic of Korea
| | - Jae Youl Cho
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
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Hossen MJ, Kim MY, Kim JH, Cho JY. AP-1-Targeted Inhibition of Macrophage Function and Lipopolysaccharide/D-Galactosamine-Induced Hepatitis by Phyllanthus acidus Methanolic Extract. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2015; 43:1137-58. [PMID: 26381032 DOI: 10.1142/s0192415x15500652] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Traditionally, Phyllanthus acidus (Phyllanthaceae) has been used for the treatment of rheumatism, bronchitis, asthma, respiratory disorders, and hepatitis. Recently, we showed that a methanol extract of Phyllanthaceae (Pa-ME) has a potent anti-inflammatory activity in RAW264.7 cells and strongly ameliorates HCl / EtOH -induced gastric ulcers in mice by targeting the Src/Syk of NF-κB. In the present study, we explored the molecular mechanism of Pa-ME on the AP-1 activation pathway and evaluated its potential hepatoprotective effects. To do this, we employed lipopolysaccharide (LPS)-stimulated RAW264.7 cells and U937 cells and an LPS/D-galactosamine (D- GaIN )-induced acute hepatitis mouse model. We utilized a multitude of assays, including immunoblotting analysis, reporter gene assays, and mRNA expression analysis, to determine the effect of Pa-ME on the AP-1 pathway. Pa-ME strikingly suppressed the production of LPS-induced pro-inflammatory cytokines including interleukin (IL)-1β, IL-6, and tumor necrosis factor-α (TNF-α). Furthermore, Pa-ME also strongly inhibited activator protein-1 (AP-1) activation and mitogen-activated protein kinase (MAPK) phosphorylation in LPS-stimulated RAW264.7 macrophages cells and the U937 monocyte like human cell line. Moreover, pre-treatment with Pa-ME exhibited strong hepatoprotective and curative effects in an LPS/D-Gal-induced mouse hepatitis model as evidenced by a decrease in elevated serum AST and ALT levels and the amelioration of histological damage. Taken together, our data suggest that Pa-ME might play a crucial ethnopharmacological role as a hepatoprotective herbal remedy by suppressing MAPK signaling and the activity of the downstream transcription factor AP-1.
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Affiliation(s)
- Muhammad Jahangir Hossen
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.,Department of Animal Science, Patuakhali Science and Technology University, Patuakhali 8602, Bangladesh
| | - Mi-Yeon Kim
- School of Systems Biological Science, Soongsil University, Seoul 156-743, Republic of Korea
| | - Jong-Hoon Kim
- Department of Veterinary Physiology, College of Veterinary Medicine, Biosafety Research Institute, Chonbuk National University, Jeonju 561-756, Republic of Korea
| | - Jae Youl Cho
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
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Hossen MJ, Kim SC, Son YJ, Baek KS, Kim E, Yang WS, Jeong D, Park JG, Kim HG, Chung WJ, Yoon K, Ryou C, Lee SY, Kim JH, Cho JY. AP-1-Targeting Anti-Inflammatory Activity of the Methanolic Extract of Persicaria chinensis. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2015; 2015:608126. [PMID: 25878717 PMCID: PMC4386570 DOI: 10.1155/2015/608126] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 02/22/2015] [Accepted: 03/02/2015] [Indexed: 11/24/2022]
Abstract
In traditional Chinese medicine, Persicaria chinensis L. has been prescribed to cure numerous inflammatory disorders. We previously analyzed the bioactivity of the methanol extract of this plant (Pc-ME) against LPS-induced NO and PGE2 in RAW264.7 macrophages and found that it prevented HCl/EtOH-induced gastric ulcers in mice. The purpose of the current study was to explore the molecular mechanism by which Pc-ME inhibits activator protein- (AP-) 1 activation pathway and mediates its hepatoprotective activity. To investigate the putative therapeutic properties of Pc-ME against AP-1-mediated inflammation and hepatotoxicity, lipopolysaccharide- (LPS-) stimulated RAW264.7 and U937 cells, a monocyte-like human cell line, and an LPS/D-galactosamine- (D-GalN-) induced acute hepatitis mouse model were employed. The expression of LPS-induced proinflammatory cytokines including interleukin- (IL-) 1β, IL-6, and tumor necrosis factor-α (TNF-α) was significantly diminished by Pc-ME. Moreover, Pc-ME reduced AP-1 activation and mitogen-activated protein kinase (MAPK) phosphorylation in both LPS-stimulated RAW264.7 cells and differentiated U937 cells. Additionally, we highlighted the hepatoprotective and curative effects of Pc-ME pretreated orally in a mouse model of LPS/D-GalN-intoxicated acute liver injury by demonstrating the significant reduction in elevated serum AST and ALT levels and histological damage. Therefore, these results strongly suggest that Pc-ME could function as an antihepatitis remedy suppressing MAPK/AP-1-mediated inflammatory events.
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Affiliation(s)
- Muhammad Jahangir Hossen
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
- Department of Animal Science, Patuakhali Science and Technology University, Patuakhali 8602, Bangladesh
| | - Seung Cheol Kim
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, Ewha Womans University Mokdong Hospital College of Medicine, Ewha Womans University, Seoul 158-710, Republic of Korea
| | - Young-Jin Son
- Department of Pharmacy, Sunchon National University, Suncheon 540-742, Republic of Korea
| | - Kwang-Soo Baek
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Eunji Kim
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Woo Seok Yang
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Deok Jeong
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Jae Gwang Park
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Han Gyung Kim
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Woo-Jae Chung
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Keejung Yoon
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Chongsuk Ryou
- Department of Pharmacy, College of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan 426-791, Republic of Korea
| | - Sang Yeol Lee
- Department of Life Science, Gachon University, Sungnam 461-701, Republic of Korea
| | - Jong-Hoon Kim
- Department of Veterinary Physiology, College of Veterinary Medicine, Biosafety Research Institute, Chonbuk National University, Jeonju 561-756, Republic of Korea
| | - Jae Youl Cho
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
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Prima V, Cao M, Svetlov SI. ASS and SULT2A1 are Novel and Sensitive Biomarkers of Acute Hepatic Injury-A Comparative Study in Animal Models. ACTA ACUST UNITED AC 2013; 2. [PMID: 23724364 DOI: 10.4172/2167-0889.1000115] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Liver and kidney damage associated with polytrauma, endotoxic shock/sepsis, and organ transplantation, are among the leading causes of the multiple organ failure. Development of novel sensitive biomarkers that detect early stages of liver and kidney injury is vital for the effective diagnostics and treatment of these life-threatening conditions. Previously, we identified several hepatic proteins, including Argininosuccinate Synthase (ASS) and sulfotransferases which were degraded in the liver and rapidly released into circulation during Ischemia/Reperfusion (I/R) injury. Here we compared sensitivity and specificity of the newly developed sandwich ELISA assays for ASS and the sulfotransferase isoform SULT2A1 with the standard clinical liver and kidney tests Alanine Aminotransferase (ALT) and Aspartate Transaminase (AST) in various pre-clinical models of acute injury. Our data suggest that ASS and SULT2A1 have superior characteristics for liver and kidney health assessment in endotoxemia, Ischemia/Reperfusion (I/R), chemical and drug-induced liver injury and may be of high potential value for clinical applications.
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Jeong HY, Moh SH, Yang Y, Yu T, Oh J, Jeong D, Yoon DH, Park KM, Lee S, Kim TW, Hong S, Kim SY, Cho JY. Src and Syk are targeted to an anti-inflammatory ethanol extract of Aralia continentalis. JOURNAL OF ETHNOPHARMACOLOGY 2012; 143:746-753. [PMID: 22885130 DOI: 10.1016/j.jep.2012.07.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2012] [Revised: 07/21/2012] [Accepted: 07/23/2012] [Indexed: 06/01/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Aralia continentalis Kitagawa (Araliaceae) is a representative ethnomedicinal herbal plant traditionally prescribed in Korea to relieve various inflammatory symptoms. However, the exact molecular mechanism of its anti-inflammatory activity has not been fully investigated. MATERIALS AND METHODS The effect of the ethanol extract from the roots of this plant (Ac-EE) on the production of the inflammatory mediator nitric oxide (NO) was studied in RAW264.7 cells. Its effect on inflammatory symptoms (gastritis and hepatitis) in mice was also examined. In particular, the molecular inhibitory mechanism was analysed by measuring the activation of transcription factors and their upstream signalling and the kinase activity of target enzymes. RESULTS Ac-EE dose-dependently suppressed NO production in lipopolysaccharide (LPS)-activated RAW264.7 cells. This extract also displayed curative activity against EtOH/HCl-induced gastritis and LPS-induced hepatitis in mice. Ac-EE-mediated anti-inflammatory activity was found to be at the transcriptional level, as it blocked the activation of the nuclear factor (NF)-κB pathway composed of Syk and Src, according to immunoblotting and immunoprecipitation analyses and a kinase assay with whole and nucleus lysates from RAW264.7 cells and mice. CONCLUSION Ac-EE may be developed as a functional herbal remedy targeting Syk- and Src-mediated anti-inflammatory mechanisms. Future work using pre-clinical studies will be needed to investigate this possibility.
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Affiliation(s)
- Hye Yoon Jeong
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
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Jung Y, Byeon SE, Yoo DS, Lee YG, Yu T, Yang Y, Kim JH, Kim E, Jeong D, Rhee MH, Choung ES, Hong S, Cho JY. 8-(Tosylamino)quinoline inhibits macrophage-mediated inflammation by suppressing NF-κB signaling. Acta Pharmacol Sin 2012; 33:1037-46. [PMID: 22796759 DOI: 10.1038/aps.2012.52] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
AIM The macrophage-mediated inflammatory response may contribute to the development of cancer, diabetes, atherosclerosis and septic shock. This study was to characterize several new compounds to suppress macrophage-mediated inflammation. METHODS Peritoneal macrophages from C57BL/6 male mice and RAW264.7 cells were examined. Anti-inflammatory activity was evaluated in the cells exposed to lipopolysaccharide (LPS). The mechanisms of the anti-inflammatory activity were investigated via measuring transcription factor activation in response to specific signals and via assaying the activities of the target kinases. RESULTS Of 7 candidate compounds tested, 8-(tosylamino)quinoline (8-TQ, compound 7) exhibited the strongest activities in suppressing the production of NO, TNF-α, and PGE(2) in LPS-activated RAW264.7 cells and peritoneal macrophages (the IC(50) values=1-5 μmol/L). This compound (1.25-20 μmol/L) dose-dependently suppressed the expression of the pro-inflammatory genes for iNOS, COX-2, TNF-α, and the cytokines IL-1β and IL-6 at the level of transcription in LPS-activated RAW264.7 cells. 8-TQ (20 μmol/L) significantly suppressed the activation of NF-κB and its upstream signaling elements, including inhibitor of κB (IκBα), IκBα kinase (IKK) and Akt in LPS-activated RAW264.7 cells. In in vivo experiments, oral administration of 20 and 40 mg/kg 8-TQ for 3 d significantly alleviated the signs of LPS-induced hepatitis and HCl/EtOH-induced gastritis, respectively, in ICR mice. CONCLUSION 8-TQ (compound 7) exerts significant anti-inflammatory activity through the inhibition of the Akt/NF-κB pathway, thus may be developed as a novel anti-inflammatory drug.
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Prima V, Wang A, Molina G, Wang KK, Svetlov SI. Inhibition of LPS toxicity by hepatic argininosuccinate synthase (ASS): Novel roles for ASS in innate immune responses to bacterial infection. Int Immunopharmacol 2011; 11:1180-8. [DOI: 10.1016/j.intimp.2011.03.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 03/18/2011] [Accepted: 03/23/2011] [Indexed: 01/09/2023]
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Ramírez I, Soley M. Submandibular salivary glands: influence on growth rate and life span in mice. J Physiol Biochem 2010; 67:225-33. [PMID: 21191684 DOI: 10.1007/s13105-010-0067-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2010] [Accepted: 12/10/2010] [Indexed: 12/11/2022]
Abstract
Submandibular glands accumulate a variety of growth factors, especially in male mice. Surgical excision of these glands (sialoadenectomy) results in alterations in several organs and systems including the liver, skin and reproductive system. We studied the life-long consequences of sialoadenectomy in male mice. Animals were operated at the age of 10 weeks. Thereafter, body weight and food and water intake were controlled until death. Few weeks after surgery, body weight was lower in sialoadenectomized than in control mice. The difference remained stable until the age of 80 weeks. In spite of the lower body weight, food intake was higher in sialoadenectomized mice than in controls. The first death of sialoadenectomized mice occurred 10 weeks earlier than that of the first control, and the initial death rate in sialoadenectomized mice was almost twice the rate in controls. After 100 weeks of life, the death rate increased in control mice, but suddenly decreased in sialoadenectomized mice. The consequence was that the mean life span of the last 25% surviving animals was 10 weeks longer in sialoadenectomized than in control mice. Autopsy examination suggests that the effect of sialoadenectomy on death rate may be the consequence of a contrasting effect on tumour growth. Our results indicate that submandibular glands, or rather the factors derived from these glands, have contrasting roles in tumour growth. At early ages they may be survival factors and protect tissues, whereas at later ages they may stimulate the growth of transformed cells.
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Affiliation(s)
- Ignasi Ramírez
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Barcelona, Avda. Diagonal 645, 08028 Barcelona, Spain.
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Lee JY, Lee YG, Lee J, Yang KJ, Kim AR, Kim JY, Won MH, Park J, Yoo BC, Kim S, Cho WJ, Cho JY. Akt Cys-310-targeted inhibition by hydroxylated benzene derivatives is tightly linked to their immunosuppressive effects. J Biol Chem 2010; 285:9932-9948. [PMID: 20054000 DOI: 10.1074/jbc.m109.074872] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The hydroxylated benzene metabolite hydroquinone (HQ) is mainly generated from benzene, an important industrial chemical, and is also a common dietary component. Although numerous reports have addressed the tumorigenesis-inducing effects of HQ, few papers have explored its molecular regulatory mechanism in immunological responses. In this study we characterized Akt (protein kinase B)-targeted regulation by HQ and its derivatives, in suppressing inflammatory responses using cellular, molecular, biochemical, and immunopharmacological approaches. HQ down-regulated inflammatory responses such as NO production, surface levels of pattern recognition receptors, and cytokine gene expression with IC(50) values that ranged from 5 to 10 microm. HQ inhibition was mediated by blocking NF-kappaB activation via suppression of its translocation pathway, which is composed of Akt, I kappaB alpha kinase beta, and I kappaB alpha. Of the targets in this pathway, HQ directly targeted and bound to the sulfhydryl group of Cys-310 of Akt and sequentially interrupted the phosphorylation of both Thr-308 and Ser-473 by mediation of beta-mercaptoethanol, according to the liquid chromatography/mass spectroscopy analysis of the interaction of HQ with an Akt-derived peptide. Therefore, our data suggest that Akt and its target site Cys-310 can be considered as a prime molecular target of HQ-mediated immunosuppression and for novel anti-Akt-targeted immunosuppressive drugs.
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Affiliation(s)
- Ji Yeon Lee
- School of Bioscience and Biotechnology and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 200-701
| | - Yong Gyu Lee
- School of Bioscience and Biotechnology and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 200-701
| | - Jaehwi Lee
- College of Pharmacy, Chung-Ang University, Seoul 156-756
| | - Keum-Jin Yang
- Department of Pharmacology, Daejeon Regional Cancer Center, Cancer Research Institute, College of Medicine, Chungnam National University, Daejeon 310-010
| | - Ae Ra Kim
- School of Bioscience and Biotechnology and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 200-701
| | - Joo Young Kim
- School of Bioscience and Biotechnology and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 200-701
| | - Moo-Ho Won
- Department of Anatomy and Neurobiology and Institute of Neurodegeneration and Neuroregeneration, College of Medicine, Hallym University, Chucheon 200-702
| | - Jongsun Park
- Department of Pharmacology, Daejeon Regional Cancer Center, Cancer Research Institute, College of Medicine, Chungnam National University, Daejeon 310-010
| | - Byong Chul Yoo
- Research Institute and Hospital, National Cancer Center, Goyang 410-769
| | - Sanghee Kim
- College of Pharmacy, Seoul National University, Seoul 151-741
| | - Won-Jea Cho
- College of Pharmacy, Chonnam National University, Kwangju 500-757, Korea
| | - Jae Youl Cho
- School of Bioscience and Biotechnology and Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon 200-701.
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Sánchez O, Almagro A, Viladrich M, Ramírez I, Soley M. Sialoadenectomy enhances hepatic injury induced by lipopolysaccharide/galactosamine in mice. Liver Int 2008; 28:878-88. [PMID: 18346130 DOI: 10.1111/j.1478-3231.2008.01713.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
BACKGROUND Submandibular salivary glands (SMGs) synthesize, accumulate and secrete a large amount of epidermal growth factor (EGF) in mice. It is known that surgical removal of SMG (sialoadenectomy) alters cell turnover in the liver and exacerbates liver injury induced by lipopolysaccharide/galactosamine (LPS/GalN). RESULTS Here we show that such increased hepatotoxicity is not the consequence of the lack of EGF production from SMG. On the contrary, it appears to be the consequence of an inadequate cytokine production by the liver of sialoadenectomized mice. Thus, we found that the increase of plasma tumour necrosis factor-alpha and interleukin-6 was slower in sialoadenectomized than in sham-operated mice. This is because of a decreased rate of production of both cytokines by the liver. We found that the increase of plasma corticosterone (CS) concentration is lower in sialoadenectomized than that in sham-operated mice. Adrenalectomy exacerbated liver injury induced by LPS/GalN. In these animals, sialoadenectomy did not further increase the effect of LPS/GalN. CONCLUSIONS Our results suggest that the effect of sialoadenectomy on LPS/GalN-induced liver toxicity may be the consequence of an altered cytokine production by the liver and a reduced CS release from adrenal glands.
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Affiliation(s)
- Olga Sánchez
- Departament de Bioquímica i Biologia Molecular, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
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Sánchez O, Viladrich M, Ramírez I, Soley M. Liver injury after an aggressive encounter in male mice. Am J Physiol Regul Integr Comp Physiol 2007; 293:R1908-16. [PMID: 17761516 DOI: 10.1152/ajpregu.00113.2007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Acute and intense psychological stressors induce cell damage in several organs, including the heart and the liver. Much less is known about social stress. In male mice, aggressive behavior is the most common social stressor. It is remarkable that upon fighting, submandibular salivary glands release a number of peptides into the bloodstream including epidermal growth factor (EGF). We showed previously that released EGF protects the heart from cell damage in this particular stressful situation. Here, we studied the effect of an aggressive encounter on the liver and whether EGF has a similar effect on this organ. An aggressive encounter in male mice caused inflammatory response and a transient increase in plasma alanine and aspartate transaminase activities. At 3 h, focal infiltration of neutrophils was observed in liver parenchyma. These cells accumulate on eosinophilic hepatocytes, which may correspond to dying cells. A few hours later, evidence of necrotic lesion was observed. Surgical excision of submandibular glands, sialoadenectomy, did not prevent the rise in plasma EGF concentration and did not affect the increase in plasma transaminase activities. Neither did the administration of tyrphostin AG-1478 (inhibitor of EGF receptor kinase) alter the increase in plasma alanine transaminase activity. However, it did enhance the rise in both aspartate transaminase and creatine kinase activity, suggesting heart damage. We conclude that an aggressive encounter causes mild liver damage and that released EGF does not protect this organ, in contrast to its effect on the heart.
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Affiliation(s)
- Olga Sánchez
- Dept. de Bioquímica i Biologia Molecular, Facultat de Barcelona, Universitat de Barcelona, Avda. Diagonal 645, 08028-Barcelona, Spain
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Abstract
Cirrhosis and its sequelae are responsible for close to 2% of all causes of death in the United States. Some studies have suggested that the costs of liver disease may account for as much as 1% of all health care spending, with alcohol-related liver disease (ALD) representing a major portion. It accounts for between 40% to 50% of all deaths due to cirrhosis, with an accompanying rate of progression of up to 60% in patients with pure alcoholic fatty liver over 10 years, and a 5-year survival rate as low as 35% if patients continue to drink. A subset of patients with ALD will develop an acute, virulent form of injury, acute alcoholic hepatitis, which has a substantially worse prognosis. Despite enormous progress in understanding the physiology of this disease, much remains unknown, and therefore, a consensus regarding effective therapy for ALD is lacking. Conventional therapy is still based largely on abstinence from alcohol, as well as general supportive and symptomatic care. Unfortunately, hepatocellular damage may progress despite these measures. Multiple treatment interventions for both the short- and long-term morbidity and mortality of this disease have been proposed, but strong disagreement exists among experts regarding the value of any of the proposed specific therapeutic interventions.
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Affiliation(s)
- Robert S O'Shea
- Department of Gastroenterology and Hepatology A30, Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA.
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14
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Buira I, Poch E, Sánchez O, Fernández-Varo G, Grau M, Tebar F, Ramírez I, Soley M. Sialoadenectomy alters liver cell turn-over and function in mice. J Cell Physiol 2003; 198:12-21. [PMID: 14584039 DOI: 10.1002/jcp.10402] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In rodents, submandibular salivary glands accumulate a number of biologically active peptides, and release some of them to both saliva and the bloodstream. Surgical removal of these glands (sialoadenectomy) alters the ability of the liver to regenerate after partial hepatectomy. We show here that 5 weeks after surgery, the liver of sialoadenectomized mice contained 40% fewer hepatocytes than the liver of sham-operated mice. We did not obtain evidence of necrotic cell death after surgery. In contrast, sialoadenectomy transiently increased apoptotic hepatocyte death, as revealed by terminal deoxynucleotidyl transferase(TdT)-mediated dUTP nick-end labeling (TUNEL) assay. DNA synthesis was determined in vivo by the incorporation of bromo-deoxyuridine (BrdU) into hepatocyte nuclei. BrdU-labeling progressively increased after sialoadenectomy. We conclude that sialoadenectomy induced a transient wave of apoptotic cell death followed by a rise in DNA synthesis but not by cell division. This reduced cell number but increased mean cell volume. In spite of these alterations in cellularity, the liver responded adequately to several stressful conditions, as judged by the lack of any differential effect of sialoadenectomy on liver glycogen and plasma glucose concentration after immobilization, aggressive encounter, or fasting. However, the liver of sialoadenectomized mice was more sensitive to the effect of a non-lethal dose of bacterial lipopolysaccharide (LPS) combined with d-galactosamine, as shown by the enhanced rise in plasma alanine aminotransferase and aspartate aminotransferase, and liver myeloperoxidase (MPO) activities. All these results indicate that a submandibular salivary glands-liver axis is involved in the maintenance of liver structure in mice. A disturbance of this axis induces an adaptive response that preserves the metabolic function of the liver but renders it more sensitive to bacterial endotoxins.
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Affiliation(s)
- Irma Buira
- Departament de Bioquímica i Biologia Molecular, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
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15
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Deaciuc IV, D'Souza NB, Burikhanov R, Lee EY, Tarba CN, McClain CJ, Villiers WJS. Epidermal Growth Factor Protects the Liver Against Alcohol-Induced Injury and Sensitization to Bacterial Lipopolysaccharide. Alcohol Clin Exp Res 2002. [DOI: 10.1111/j.1530-0277.2002.tb02616.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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