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Kumar M R, Alagumuthu M, V VD. Synthesis and Molecular Drug Efficacy of Indoline-based Dihydroxy-thiocarbamides: Inflammation Regulatory Property Unveiled over COX-2 Inhibition, Molecular Docking, and Cytotoxicity Prospects. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Rajesh Kumar M
- Department of Chemistry; Bishop Heber College; Tiruchirappalli India
| | - Manikandan Alagumuthu
- Department of Biotechnology, School of Bio-Sciences and Technology; VIT University; Vellore 632014 India
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2
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Efficacy of phenyl quinoline phenol derivatives as COX-2 inhibitors; an approach to emergent the small molecules as the anti-inflammatory and analgesic therapeutics. Inflammopharmacology 2017; 25:621-631. [DOI: 10.1007/s10787-017-0342-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 03/23/2017] [Indexed: 10/19/2022]
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3
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Synthesis and biological evaluation of chalcone derivatives containing aminoguanidine or acylhydrazone moieties. Bioorg Med Chem Lett 2016; 26:5920-5925. [DOI: 10.1016/j.bmcl.2016.11.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/28/2016] [Accepted: 11/01/2016] [Indexed: 11/18/2022]
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4
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Jeong SJ, Kim OS, Yoo SR, Seo CS, Kim Y, Shin HK. Anti‑inflammatory and antioxidant activity of the traditional herbal formula Gwakhyangjeonggi‑san via enhancement of heme oxygenase‑1 expression in RAW264.7 macrophages. Mol Med Rep 2016; 13:4365-71. [PMID: 27052497 DOI: 10.3892/mmr.2016.5084] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 12/21/2015] [Indexed: 12/27/2022] Open
Abstract
Gwakhyangjeonggi‑san (GHJGS) is a mixture of herbal plants, including Agastache rugosa, Perilla frutescens, Angelica dahurica, Areca catechu, Poria cocos, Magnolia officinalis, Atractylodes macrocephala, Citrus reticulata, Pinellia ternata, Platycodon grandiflorum, Glycyrrhiza uralensis, Ziziphus jujuba and Zingiber officinale. GHJGS has been used for treating diarrhea‑predominant irritable bowel syndrome in traditional Korean medicine. In the present study, the anti‑inflammatory and antioxidant effects of GHJGS were investigated using the RAW 264.7 murine macrophage cell line. GHJGS significantly reduced production of the proinflammatory cytokines, tumor necrosis factor‑α, interleukin‑6 and prostaglandin E2 in lipopolysaccharide (LPS)‑stimulated macrophages. GHJGS markedly suppressed LPS‑induced phosphorylation of mitogen‑activated protein kinases, whereas it had no effect on nuclear factor‑κB activation. Furthermore, GHJGS enhanced expression of heme oxygenase‑1 and prevented the generation of reactive oxygen species in RAW 264.7 cells. These results indicate that GHJGS is a viable therapeutic agent against inflammation and oxidative stress‑associated disorders.
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Affiliation(s)
- Soo-Jin Jeong
- KM Convergence Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Republic of Korea
| | - Ohn-Soon Kim
- KM Convergence Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Republic of Korea
| | - Sae-Rom Yoo
- K‑herb Research Center, Korea Institute of Oriental Medicine, Daejeon, Chungcheong 34054, Republic of Korea
| | - Chang-Seob Seo
- K‑herb Research Center, Korea Institute of Oriental Medicine, Daejeon, Chungcheong 34054, Republic of Korea
| | - Yeji Kim
- K‑herb Research Center, Korea Institute of Oriental Medicine, Daejeon, Chungcheong 34054, Republic of Korea
| | - Hyeun-Kyoo Shin
- K‑herb Research Center, Korea Institute of Oriental Medicine, Daejeon, Chungcheong 34054, Republic of Korea
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5
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6
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Bhalla Y, Gupta VK, Jaitak V. Anticancer activity of essential oils: a review. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2013; 93:3643-53. [PMID: 23765679 DOI: 10.1002/jsfa.6267] [Citation(s) in RCA: 128] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 06/02/2013] [Accepted: 06/14/2013] [Indexed: 05/06/2023]
Abstract
Natural essential oil constituents play an important role in cancer prevention and treatment. Essential oil constituents from aromatic herbs and dietary plants include monoterpenes, sesquiterpenes, oxygenated monoterpenes, oxygenated sesquiterpenes and phenolics among others. Various mechanisms such antioxidant, antimutagenic and antiproliferative, enhancement of immune function and surveillance, enzyme induction and enhancing detoxification, modulation of multidrug resistance and synergistic mechanism of volatile constituents are responsible for their chemopreventive properties. This review covers the most recent literature to summarize structural categories and molecular anticancer mechanisms of constituents from aromatic herbs and dietary plants.
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Affiliation(s)
- Yashika Bhalla
- Centre for Chemical and Pharmaceutical Sciences, Central University of Punjab, Bathinda, (Pb), 151001, India
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7
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F Zayed M, H Hassan M. Synthesis and biological evaluation studies of novel quinazolinone derivatives as antibacterial and anti-inflammatory agents. Saudi Pharm J 2013; 22:157-62. [PMID: 24648828 DOI: 10.1016/j.jsps.2013.03.004] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 03/29/2013] [Indexed: 12/21/2022] Open
Abstract
Some novel 6,8-diiodo-2-methyl-3-substituted-quinazolin-4(3H)-ones bearing sulfonamide derivatives (4-11) were synthesized in good yields and evaluated for their possible antibacterial, anti-inflammatory activities and acute toxicity. The structures of the synthesized compounds were confirmed on the basis of their spectral data and elemental analysis. Their antibacterial activities were evaluated by the agar well diffusion method while their anti-inflammatory activities were evaluated by the carrageenan-induced hind paw edema test. All the tested compounds showed considerable antibacterial activities and high to moderate anti-inflammatory activities that last for 12 h compared to ibuprofen. All the tested compounds showed no toxic symptoms or mortality rates 24 h post-administration at tested anti-inflammatory doses. In addition, LD50 for all tested compounds was higher than that for ibuprofen implying their good safety margin. The obtained results showed that the most active compounds could be useful as a template for future design, modification and investigation to produce more active analogs.
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Affiliation(s)
- Mohamed F Zayed
- Department of Pharmaceutical Chemistry, College of Pharmacy, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia ; Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt
| | - Memy H Hassan
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt ; Department of Pharmacy, College of Medical Rehabilitation Sciences, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia
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8
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Silva AA, Ferreira DOL, Santarosa BP, Dias A, Damasceno DC, Gonçalves RC. Effect of percutaneous transthoracic lung biopsy on oxidative metabolism in sheep. J S Afr Vet Assoc 2012; 83:14. [PMID: 23327126 DOI: 10.4102/jsava.v83i1.14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Accepted: 03/16/2012] [Indexed: 11/01/2022] Open
Abstract
This study aimed to assess the effect of percutaneous transthoracic lung biopsy on the oxidative metabolism of sheep by measuring the oxidative stress markers of superoxide dismutase (SOD), total glutathione (GSH-t), peroxidase (GSH-Px) and thiobarbituric acid reactive substances (TBARS) in the red cells of these animals. Blood samples were collected from 20 clinically healthy sheep prior to, and 30 min after, percutaneous transthoracic lung biopsy. After biopsy, there was a significant decrease (p < 0.05) in SOD and GSH-Px activity, with no significant change (p ≥ 0.05) in GSH-t and TBARS concentrations. These results showed that percutaneous transthoracic lung biopsy did not significantly affect the oxidative metabolism of sheep 30 min after the procedure, which may be used widely in this species without causing serious tissue damage.
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Affiliation(s)
- Andreza A Silva
- Department of Veterinary Clinics, São Paulo State University, Brazil.
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9
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Guevara-Lora I. Kinin-mediated inflammation in neurodegenerative disorders. Neurochem Int 2012; 61:72-8. [PMID: 22554400 DOI: 10.1016/j.neuint.2012.04.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2012] [Revised: 04/01/2012] [Accepted: 04/10/2012] [Indexed: 01/06/2023]
Abstract
The mediatory role of kinins in both acute and chronic inflammation within nervous tissues has been widely described. Bradykinin, the major representative of these bioactive peptides, is one of a few mediators of inflammation that directly stimulates afferent nerves due to the broad expression of specific kinin receptors in cell types in these tissues. Moreover, kinins may be delivered to a site of injury not only after their production at the endothelium surface but also following their local production through the enzymatic degradation of kininogens at the surface of nerve cells. A strong correlation between inflammatory processes and neurodegeneration has been established. The activation of nerve cells, particularly microglia, in response to injury, trauma or infection initiates a number of reactions in the neuronal neighborhood that can lead to cell death after the prolonged action of inflammatory substances. In recent years, there has been a growing interest in the effects of kinins on neuronal destruction. In these studies, the overexpression of proteins involved in kinin generation or of kinin receptors has been observed in several neurologic disorders including neurodegenerative diseases such Alzheimer's disease and multiple sclerosis as well as disorders associated with a deficiency in cell communication such as epilepsy. This review is focused on recent findings that provide reliable evidence of the mediatory role of kinins in the inflammatory responses associated with different neurological disorders. A deeper understanding of the role of kinins in neurodegenerative diseases is likely to promote the future development of new therapeutic strategies for the control of these disorders. An example of this could be the prospective use of kinin receptor antagonists.
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Affiliation(s)
- Ibeth Guevara-Lora
- Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland.
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10
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Kim SC, Kang SH, Jeong SJ, Kim SH, Ko HS, Kim SH. Inhibition of c-Jun N-terminal kinase and nuclear factor κ B pathways mediates fisetin-exerted anti-inflammatory activity in lipopolysccharide-treated RAW264.7 cells. Immunopharmacol Immunotoxicol 2012; 34:645-50. [DOI: 10.3109/08923973.2011.648270] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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11
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Jeong JH, Ryu DS, Suk DH, Lee DS. Anti-inflammatory effects of ethanol extract from Orostachys japonicus on modulation of signal pathways in LPS-stimulated RAW 264.7 cells. BMB Rep 2011; 44:399-404. [PMID: 21699753 DOI: 10.5483/bmbrep.2011.44.6.399] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In this study, powder of Orostachys japonicus A. Berger (O. japonicus) was extracted with 95% ethyl alcohol and fractionated using a series of organic solvents, including n-hexane (hexane), dichloromethane (DCM), ethylacetate (EtOAc), n-butanol (BuOH), and water (H(2)O). We investigated the anti-inflammatory effects of these O. japonicus extracts on lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. Their effects on the expression of inflammatory mediators and transcription factors were analyzed by Western blotting. DCM fraction significantly inhibited formation of reactive oxygen species (ROS) as well as nitric oxide (NO) in LPS-stimulated RAW 264.7 cells. Phosphorylation of the pro-inflammatory transcription factor complex nuclear factor-kappa B (NF-κB) p65 and expression of inducible nitric oxide synthase (iNOS), one of its downstream proteins, were also suppressed by DCM fraction. These effects were regulated by upsteam proteins in the mitogen-activated protein kinase (MAPK) and phosphoinositide 3-kinase/Akt (PI3K/Akt) signaling pathways. Taken together, our data suggest that O. japonicus could be used as a potential source for anti-inflammatory agents.
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Affiliation(s)
- Jae-Han Jeong
- Department of Biomedical Laboratory Science, Inje University, Gimhae 621-749, Korea
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12
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Seo HJ, Huh JE, Han JH, Jeong SJ, Jang J, Lee EO, Lee HJ, Lee HJ, Ahn KS, Kim SH. Polygoni Rhizoma Inhibits Inflammatory Response through Inactivation of Nuclear Factor-kappaB and Mitogen Activated Protein Kinase Signaling Pathways in RAW264.7 Mouse Macrophage Cells. Phytother Res 2011; 26:239-45. [DOI: 10.1002/ptr.3530] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Revised: 04/04/2011] [Accepted: 04/04/2011] [Indexed: 11/09/2022]
Affiliation(s)
- Hyuk-Jin Seo
- College of Oriental Medicine; Kyung Hee University; Seoul 130-701 South Korea
| | - Jeong-Eun Huh
- College of Oriental Medicine; Kyung Hee University; Seoul 130-701 South Korea
| | - Jong-Hyun Han
- College of Oriental Medicine; Kyung Hee University; Seoul 130-701 South Korea
| | - Soo-Jin Jeong
- College of Oriental Medicine; Kyung Hee University; Seoul 130-701 South Korea
| | - Jinsil Jang
- College of Oriental Medicine; Kyung Hee University; Seoul 130-701 South Korea
| | - Eun-Ok Lee
- College of Oriental Medicine; Kyung Hee University; Seoul 130-701 South Korea
| | - Hyo-Jung Lee
- College of Oriental Medicine; Kyung Hee University; Seoul 130-701 South Korea
| | - Hyo-Jeong Lee
- College of Oriental Medicine; Kyung Hee University; Seoul 130-701 South Korea
| | - Kyoo Seok Ahn
- College of Oriental Medicine; Kyung Hee University; Seoul 130-701 South Korea
| | - Sung-Hoon Kim
- College of Oriental Medicine; Kyung Hee University; Seoul 130-701 South Korea
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13
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Weinhart M, Gröger D, Enders S, Riese SB, Dernedde J, Kainthan RK, Brooks DE, Haag R. The Role of Dimension in Multivalent Binding Events: Structure-Activity Relationship of Dendritic Polyglycerol Sulfate Binding to L
-Selectin in Correlation with Size and Surface Charge Density. Macromol Biosci 2011; 11:1088-98. [DOI: 10.1002/mabi.201100051] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2011] [Revised: 04/11/2011] [Indexed: 01/24/2023]
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14
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Kang TJ, Moon JS, Lee SY, Yim DS. Polyacetylene Compound from Cirsium japonicum var. ussuriense Inhibits the LPS-Induced Inflammatory Reaction via Suppression of NF-κB Activity in RAW 264.7 Cells. Biomol Ther (Seoul) 2011. [DOI: 10.4062/biomolther.2011.19.1.097] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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15
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Dela Pena IC, Ahn HS, Shin CY, Cheong JH. Neuroadaptations Involved in Long-Term Exposure to ADHD Pharmacotherapies: Alterations That Support Dependence Liability of These Medications. Biomol Ther (Seoul) 2011. [DOI: 10.4062/biomolther.2011.19.1.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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16
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Cho W, Nam JW, Kang HJ, Windono T, Seo EK, Lee KT. Zedoarondiol isolated from the rhizoma of Curcuma heyneana is involved in the inhibition of iNOS, COX-2 and pro-inflammatory cytokines via the downregulation of NF-κB pathway in LPS-stimulated murine macrophages. Int Immunopharmacol 2009; 9:1049-57. [DOI: 10.1016/j.intimp.2009.04.012] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2009] [Revised: 04/21/2009] [Accepted: 04/21/2009] [Indexed: 10/20/2022]
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17
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Cho W, Park SJ, Shin JS, Noh YS, Cho EJ, Nam JH, Lee KT. Anti-inflammatory Effects of the Methanol Extract of Polytrichum Commune via NF-κB Inactivation in RAW 264.7 Macrophage Cells. Biomol Ther (Seoul) 2008. [DOI: 10.4062/biomolther.2008.16.4.385] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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18
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Tosato M, Zamboni V, Ferrini A, Cesari M. The aging process and potential interventions to extend life expectancy. Clin Interv Aging 2007; 2:401-12. [PMID: 18044191 PMCID: PMC2685272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aging is commonly defined as the accumulation of diverse deleterious changes occurring in cells and tissues with advancing age that are responsible for the increased risk of disease and death. The major theories of aging are all specific of a particular cause of aging, providing useful and important insights for the understanding of age-related physiological changes. However, a global view of them is needed when debating of a process which is still obscure in some of its aspects. In this context, the search for a single cause of aging has recently been replaced by the view of aging as an extremely complex, multifactorial process. Therefore, the different theories of aging should not be considered as mutually exclusive, but complementary of others in the explanation of some or all the features of the normal aging process. To date, no convincing evidence showing the administration of existing "anti-aging" remedies can slow aging or increase longevity in humans is available. Nevertheless, several studies on animal models have shown that aging rates and life expectancy can be modified. The present review provides an overlook of the most commonly accepted theories of aging, providing current evidence of those interventions aimed at modifying the aging process.
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Affiliation(s)
- Matteo Tosato
- Department of Gerontology, Geriatrics and Physiatry; Catholic University of Sacred Heart, Rome, Italy
| | - Valentina Zamboni
- Department of Gerontology, Geriatrics and Physiatry; Catholic University of Sacred Heart, Rome, Italy
| | - Alessandro Ferrini
- Department of Gerontology, Geriatrics and Physiatry; Catholic University of Sacred Heart, Rome, Italy
| | - Matteo Cesari
- Department of Gerontology, Geriatrics and Physiatry; Catholic University of Sacred Heart, Rome, Italy
- Department of Aging and Geriatric Research, College of Medicine, Institute on Aging, University of Florida, Gainesville, FL, USA
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Beigier-Bompadre M, Barrionuevo P, Alves-Rosa F, Rubel CJ, Palermo MS, Isturiz MA. The formyl peptide N-formyl-methionyl-leucyl-phenylalanine downregulates the expression of FcgammaRs in interferon-gamma-activated monocytes/macrophages in vitro and in vivo. Scand J Immunol 2003; 57:221-8. [PMID: 12641650 DOI: 10.1046/j.1365-3083.2003.01219.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
N-Formyl peptides are cleavage products of bacterial and mitochondrial proteins that have pro-inflammatory activities and play an important role in antibacterial host defence. FcgammaRI is a receptor for the Fc portion of immunoglobulin G expressed in monocytes that mediates cytotoxicity and is upregulated by interferon-gamma (IFN-gamma) and interleukin-10 (IL-10). In this report, we demonstrate that N-formyl-methionyl-leucyl-phenylalanine (FMLP) downregulates the expression of FcgammaRI in IFN-gamma-treated monocytes, but not in IL-10-treated monocytes. We determine that supernatants obtained from monocytes treated with IFN-gamma and then exposed to FMLP induce the downregulation of FcgammaRI in naïve monocytes. This effect is abrogated by the protease inhibitors phenylmethylsulphonyl fluoride and phosphoramidon, which inhibit serine and metalloproteases, respectively. Supernatants from FMLP-treated neutrophils also induce the downregulation of FcgammaRI, when added to naïve monocytes. Similar observations were obtained in vivo in a mouse model of chronic inflammation. In vivo, FMLP also downregulates the expression of FcgammaRs in IFN-gamma-activated macrophages. Our results support the existence of a new mechanism through which FMLP could modulate the activity of monocytes/macrophages during bacterial infections.
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Affiliation(s)
- M Beigier-Bompadre
- CONICET, División Inmunología, Instituto de Investigaciones Hematológicas, Academia Nacional de Medicina, Buenos Aires, Argentina.
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20
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Chung HY, Kim HJ, Kim JW, Yu BP. The inflammation hypothesis of aging: molecular modulation by calorie restriction. Ann N Y Acad Sci 2002. [PMID: 11795524 DOI: 10.1111/j.1749-6632.2001.tb05662.x] [Citation(s) in RCA: 218] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Current evidence strongly indicates that reactive oxygen species (ROS) and reactive nitrogen species (RNS) are widely implicated in the inflammatory process. However, mechanistic information is not readily available on the extent to which ROS/RNS contributes to the proinflammatory states of the aging process. The involvement of the underlying inflammation during the aging process and the molecular delineation of anti-inflammatory action of calorie restriction (CR) is described. Age-related upregulations of NF-kappaB, IL-beta, IL-6, TNFalpha, cyclooxygenase-2, and inducible NO synthase are all attenuated by CR. The suppression of the NF-kappaB activation was accomplished by blocking the dissociation of inhibitory IkappaBalpha and IkappaBbeta by CR. These findings provide underlying molecular insights into the anti-inflammatory action of CR in relation to the aging process. Based on these and other available data, it is suggested that the "Inflammation Hypothesis of Aging" supports the molecular basis of the inflammatory process as a plausible cause of the aging process.
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Affiliation(s)
- H Y Chung
- Department of Pharmacy, College of Pharmacy, Research Institute of Genetic Engineering, Pusan National University, Korea.
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21
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Beigier-Bompadre M, Barrionuevo P, Alves-Rosa F, Rubel CJ, Palermo MS, Isturiz MA. N-formyl-methionyl-leucyl-phenylalanine inhibits both gamma interferon- and interleukin-10-induced expression of FcgammaRI on human monocytes. CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY 2001; 8:402-8. [PMID: 11238229 PMCID: PMC96070 DOI: 10.1128/cdli.8.2.402-408.2001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2000] [Accepted: 12/21/2000] [Indexed: 11/20/2022]
Abstract
Three different classes of receptors for the Fc portion of immunoglobulin G (FcgammaRs), FcgammaRI, FcgammaRII, and FcgammaRIII, have been identified on human leukocytes. One of them, FcgammaRI, is a high-affinity receptor capable of induction of functions that include phagocytosis, respiratory burst, antibody-dependent cell-mediated cytotoxicity (ADCC), and secretion of cytokines. This receptor is expressed on mononuclear phagocytes, and this expression is regulated by cytokines and hormones such as gamma interferon (IFN-gamma), IFN-beta, interleukin-10 (IL-10), and glucocorticoids. We have recently demonstrated that the chemotactic peptide N-formyl-methionyl-leucyl-phenylalanine (FMLP) is capable of inducing a time-dependent downregulation of both FcgammaRIIIB and FcgammaRII in human neutrophils, altering FcgammaR-dependent functions. Considering the biological relevance of the regulation of FcgammaRI, we investigated the effect of FMLP on the overexpression of FcgammaRI induced by both IFN-gamma and IL-10 on human monocytes. We demonstrate that FMLP significantly abrogated IFN-gamma- and IL-10-induced FcgammaRI expression, although its basal level of expression was not altered. However, other IFN-gamma-mediated effects such as the overexpression of the major histocompatibility complex class II antigens and the enhancement of lipopolysaccharide-induced secretion of tumor necrosis factor alpha were not affected by FMLP treatment. The formyl peptide completely inhibited the IFN-gamma- and IL-10-induced enhancement of ADCC and phagocytosis carried out by adherent cells. The inhibitory effect of FMLP on FcgammaRI upregulation could exert an important regulatory effect during the evolution of bacterial infections.
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Affiliation(s)
- M Beigier-Bompadre
- CONICET, División Inmunología, Instituto de Investigaciones Hematológicas, Academia Nacional de Medicina, Pacheco de Melo 3081, 1425 Buenos Aires, Argentina
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22
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Palermo M, Alves-Rosa F, Rubel C, Fernández GC, Fernández-Alonso G, Alberto F, Rivas M, Isturiz M. Pretreatment of mice with lipopolysaccharide (LPS) or IL-1beta exerts dose-dependent opposite effects on Shiga toxin-2 lethality. Clin Exp Immunol 2000; 119:77-83. [PMID: 10606967 PMCID: PMC1905548 DOI: 10.1046/j.1365-2249.2000.01103.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Haemolytic uraemic syndrome (HUS) has been closely associated with infection with a group of Shiga toxin-producing enterohaemorrhagic Eschericchia coli in young children. Shiga toxins (Stx) have been implicated as pathogenic agents of HUS by binding to the surface receptor of endothelial cells. LPS is a central product of the Gram-negative bacteria and several reports have documented that both LPS and Stx are important for disease development. In this study the reciprocal interactions between LPS and Stx2 are analysed in a mouse model. The results demonstrated that LPS was able to reduce or enhance Stx2 toxicity, depending on the dose and the timing of the injection. The involvement of the main early cytokines induced by LPS, tumour necrosis factor alpha (TNF-alpha) and IL-1beta, in those LPS opposite effects on Stx2 toxicity was evaluated. Stx2 toxicity was enhanced by in vivo injection of murine TNF-alpha and low doses of murine IL-1beta. However, at higher doses of IL-1beta which induced corticosteroid increase in serum, Stx2 lethality was decreased. Considering that dexamethasone and IL-1beta reproduce the LPS protective effects, it is suggested that endogenous corticosteroids secondary to the inflammatory response induced by LPS, mediate the protection against Stx2. It can be concluded that the fine equilibrium between proinflammatory and anti-inflammatory activities strongly influences Stx2 toxicity.
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Affiliation(s)
- M Palermo
- División Inmunología, Instituto de Investigaciones Hematológicas, Academia Nacional de Medicina, Infecciosas, ANLIS, Buenos Aires, Argentina.
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