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Wang X, Wang Q, Cai D, Yu J, Liu X, Yin F, Zhou D. In vitro plasma hydrolysis of phenolic esters and their absorption kinetics in rats: Controlled release of phenolic compounds and enhanced health benefits. Food Chem 2024; 435:137647. [PMID: 37804730 DOI: 10.1016/j.foodchem.2023.137647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 09/23/2023] [Accepted: 09/30/2023] [Indexed: 10/09/2023]
Abstract
Phenolic esters are considered as promising functional food ingredients. However, their digestion, absorption and metabolism are still unclear. Tyrosol acyl esters (TYr-Es), hydroxytyrosol acyl esters (HTy-Es) and alkyl gallates (A-GAs) were hydrolyzed by carboxylesterase in plasma and exhibited slow release of polyphenols (phenolic acids). In vitro hydrolysis degrees initially increased and then decreased with the increasing carbon chain length (C2-C16). TYr-Es exhibited higher hydrolysis degrees compared to HTy-Es, and hydrolysis degrees of TYr-Es and HTy-Es were markedly higher than those of A-GAs. Due to the fast hydrolysis rates of TYr-Es and HTy-Es, they were undetectable in all rat plasma samples collected at several times within 24 h after administration. Whereas, A-GAs could be detected in rat plasmas and three absorption peaks were found in the pharmacokinetic profiles. Importantly, the T1/2, MRT, AUC0-∞, AUC0-t in octyl gallate group were longer (or stronger) than those in propyl gallate and dodecyl gallate groups.
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Affiliation(s)
- Xinmiao Wang
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Qian Wang
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Dong Cai
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Jinghan Yu
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Xiaoyang Liu
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
| | - Fawen Yin
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China.
| | - Dayong Zhou
- SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, Liaoning Province Key Laboratory for Marine Food Science and Technology, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, People's Republic of China
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Hussain MS, Gupta G, Goyal A, Thapa R, Almalki WH, Kazmi I, Alzarea SI, Fuloria S, Meenakshi DU, Jakhmola V, Pandey M, Singh SK, Dua K. From nature to therapy: Luteolin's potential as an immune system modulator in inflammatory disorders. J Biochem Mol Toxicol 2023; 37:e23482. [PMID: 37530602 DOI: 10.1002/jbt.23482] [Citation(s) in RCA: 29] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 07/05/2023] [Accepted: 07/20/2023] [Indexed: 08/03/2023]
Abstract
Inflammation is an essential immune response that helps fight infections and heal tissues. However, chronic inflammation has been linked to several diseases, including cancer, autoimmune disorders, cardiovascular diseases, and neurological disorders. This has increased interest in finding natural substances that can modulate the immune system inflammatory signaling pathways to prevent or treat these diseases. Luteolin is a flavonoid found in many fruits, vegetables, and herbs. It has been shown to have anti-inflammatory effects by altering signaling pathways in immune cells. This review article discusses the current research on luteolin's role as a natural immune system modulator of inflammatory signaling mechanisms, such as its effects on nuclear factor-kappa B, mitogen-activated protein kinases, Janus kinase/signal transducer and activator of transcription, and inflammasome signaling processes. The safety profile of luteolin and its potential therapeutic uses in conditions linked to inflammation are also discussed. Overall, the data point to Luteolin's intriguing potential as a natural regulator of immune system inflammatory signaling processes. More research is needed to fully understand its mechanisms of action and possible therapeutic applications.
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Affiliation(s)
- Md Sadique Hussain
- School of Pharmaceutical Sciences, Jaipur National University, Jaipur, Rajasthan, India
| | - Gaurav Gupta
- School of Pharmacy, Suresh Gyan Vihar University, Jaipur, India
- Center for Global Health research (CGHR), Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai, India
| | - Ahsas Goyal
- Institute of Pharmaceutical Research, GLA University, Mathura, Uttar Pradesh, India
| | - Riya Thapa
- School of Pharmacy, Suresh Gyan Vihar University, Jaipur, India
| | | | - Imran Kazmi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Sami I Alzarea
- Department of Pharmacology, College of Pharmacy, Jouf University, Sakaka, Al-Jouf, Saudi Arabia
| | | | | | - Vikas Jakhmola
- Uttaranchal Institute of Pharmaceutical Sciences, Uttaranchal University, Dehradun, India
| | - Manisha Pandey
- Department of Pharmaceutical Sciences, Central University of Haryana, Mahendergarh, India
| | - Sachin Kumar Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India
- Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, Australia
| | - Kamal Dua
- Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, Australia
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, Sydney, New South Wales, Australia
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Choi SH, Kim SY, Kim KM, Mony TJ, Bae HJ, Kim MS, Lee CH, Choi SE, Lee SH, Park SJ. Fermented Sprouts of Codonopsis lanceolata Suppress LPS-Induced Inflammatory Responses by Inhibiting NF-κB Signaling Pathway in RAW 264.7 Macrophages and CD1 Mice. Pharmaceutics 2023; 15:1793. [PMID: 37513980 PMCID: PMC10384864 DOI: 10.3390/pharmaceutics15071793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/16/2023] [Accepted: 06/19/2023] [Indexed: 07/30/2023] Open
Abstract
The interest in bioconversion through fermentation of sprouts produced in smart farms is increasing due to their potential health benefits. Codonopsis lanceolata (CL) is reported to alleviate inflammatory conditions, but much research is still needed to determine which types and parts of CL are most effective. This study investigated the anti-inflammatory effects of a fermented extract of CL sprouts' aerial part (F-CSA) against LPS-stimulated RAW 264.7 macrophages and mice. In the screening test, F-CSA showed the most substantial anti-inflammatory effect among several samples, containing the highest total flavonoids, tannins, and polyphenols. UPLC-ESI-Q/TOF-MS and HPLC analysis revealed that F-CSA had the highest amount of luteolin among all the CL samples analyzed. F-CSA reduced the release of inflammatory cytokines and mediators such as NO and PGE2 by inhibiting the expression levels of iNOS and COX-2 in LPS-stimulated macrophages. Further, we found that the anti-inflammatory effects of F-CSA were mediated by inhibiting the JNK/NF-κB signaling pathway. Moreover, F-CSA improved survival rates and reduced plasma levels of NO and IL-6 in CD1 mice stimulated with LPS. These findings suggest that F-CSA, which contains luteolin, can alleviate inflammation in LPS-induced RAW 264.7 cells and a CD1 mouse model by inhibiting the JNK/NF-κB signaling pathways.
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Affiliation(s)
- Seung-Hyuk Choi
- Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - So-Yeon Kim
- Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Kyeong-Min Kim
- Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Tamanna Jahan Mony
- Agriculture and Life Science Research Institute, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Ho Jung Bae
- Agriculture and Life Science Research Institute, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Min Seok Kim
- Department of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Chan Ho Lee
- Department of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sun-Eun Choi
- Department of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sang Ho Lee
- College of Pharmacy, Jeju National University, Jeju 63243, Republic of Korea
| | - Se Jin Park
- Department of Food Biotechnology and Environmental Science, Kangwon National University, Chuncheon 24341, Republic of Korea
- Agriculture and Life Science Research Institute, Kangwon National University, Chuncheon 24341, Republic of Korea
- School of Natural Resources and Environmental Sciences, Kangwon National University, Chuncheon 24341, Republic of Korea
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Diedrich C, Zittlau IC, Khalil NM, Leontowich AFG, Freitas RAD, Badea I, Mainardes RM. Optimized Chitosan-Based Nanoemulsion Improves Luteolin Release. Pharmaceutics 2023; 15:1592. [PMID: 37376041 DOI: 10.3390/pharmaceutics15061592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/08/2023] [Accepted: 05/14/2023] [Indexed: 06/29/2023] Open
Abstract
Luteolin (LUT) is a flavonoid found in several edible and medicinal plants. It is recognized for its biological activities such as antioxidant, anti-inflammatory, neuroprotective, and antitumor effects. However, the limited water solubility of LUT leads to poor absorption after oral administration. Nanoencapsulation may improve the solubility of LUT. Nanoemulsions (NE) were selected for the encapsulation of LUT due to their biodegradability, stability, and ability to control drug release. In this work, chitosan (Ch)-based NE was developed to encapsulate luteolin (NECh-LUT). A 23 factorial design was built to obtain a formulation with optimized amounts of oil, water, and surfactants. NECh-LUT showed a mean diameter of 67.5 nm, polydispersity index 0.174, zeta potential of +12.8 mV, and encapsulation efficiency of 85.49%. Transmission electron microscopy revealed spherical shape and rheological analysis verified the Newtonian behavior of NECh-LUT. SAXS technique confirmed the bimodal characteristic of NECh-LUT, while stability analysis confirmed NECh-LUT stability when stored at room temperature for up to 30 days. Finally, in vitro release studies showed LUT controlled release up to 72 h, indicating the promising potential of NECh-LUT to be used as novel therapeutic option to treat several disorders.
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Affiliation(s)
- Camila Diedrich
- Pharmaceutical Nanotechnology Laboratory, Universidade Estadual do Centro-Oeste, Guarapuava 85040-167, Brazil
| | - Isabella C Zittlau
- Pharmaceutical Nanotechnology Laboratory, Universidade Estadual do Centro-Oeste, Guarapuava 85040-167, Brazil
| | - Najeh M Khalil
- Pharmaceutical Nanotechnology Laboratory, Universidade Estadual do Centro-Oeste, Guarapuava 85040-167, Brazil
| | | | - Rilton A de Freitas
- Biopol, Chemistry Department, Federal University of Parana, Curitiba 81531-980, Brazil
| | - Ildiko Badea
- Drug Design and Discovery Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada
| | - Rubiana M Mainardes
- Pharmaceutical Nanotechnology Laboratory, Universidade Estadual do Centro-Oeste, Guarapuava 85040-167, Brazil
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Vajdi M, Karimi A, Karimi M, Abbasalizad Farhangi M, Askari G. Effects of luteolin on sepsis: A comprehensive systematic review. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 113:154734. [PMID: 36898254 DOI: 10.1016/j.phymed.2023.154734] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 02/16/2023] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Sepsis and septic shock are the main causes of mortality and complications in intensive care units all over the world. Luteolin is thought to have a significant role as a free radical scavenger, an anti-inflammatory agent, and an immune system modulator. The object of this review is to conduct a systematic review of the effects of luteolin and its mechanisms of action in the treatment of sepsis and its complications. METHOD The investigation was carried out in accordance with the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) guidelines (PROSPERO: CRD42022321023). We searched Embase, Web of Science, Google Scholar, Science Direct, PubMed, ProQuest, and Scopus databases up to January 2023 by using the relevant keywords. RESULTS Out of 1,395 records screened, 33 articles met the study criteria. In the collected papers, the main reported findings are that luteolin can affect inflammation-initiating pathways such as toll-like receptors and high mobility group box-1 and reduces the expression of genes that produce inflammatory cytokines, such as the Nod receptor protein-3, and nuclear factor kappa-light chain-enhancer of activated B cells. Luteolin also reduces the overactivity of macrophages, neutrophil extracellular traps and lymphocytes by regulating the immune response. CONCLUSION Most studies revealed luteolin's positive benefits on sepsis through several pathways. Luteolin showed the capacity to reduce inflammation and oxidative stress, control immunological response, and prevent organ damage (in vivo studies) during sepsis. Large-scale in vivo experiments are necessary to elucidate its potential impacts on sepsis.
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Affiliation(s)
- Mahdi Vajdi
- Student Research Committee, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Arash Karimi
- Nutrition Research Center, Department of Clinical Nutrition, School of Nutrition & Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Mozhdeh Karimi
- Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Mahdieh Abbasalizad Farhangi
- Department of Community Nutrition, School of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Gholamreza Askari
- Department of Community Nutrition, School of Nutrition and Food Science, Nutrition and Food Security Research Center, Isfahan University of Medical Science, Isfahan, Iran.
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Hou C, Jin Y, Wu H, Li P, Liu L, Zheng K, Wang C. Alternative strategies for Chlamydia treatment: Promising non-antibiotic approaches. Front Microbiol 2022; 13:987662. [PMID: 36504792 PMCID: PMC9727249 DOI: 10.3389/fmicb.2022.987662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 11/04/2022] [Indexed: 11/24/2022] Open
Abstract
Chlamydia is an obligate intracellular bacterium where most species are pathogenic and infectious, causing various infectious diseases and complications in humans and animals. Antibiotics are often recommended for the clinical treatment of chlamydial infections. However, extensive research has shown that antibiotics may not be sufficient to eliminate or inhibit infection entirely and have some potential risks, including antibiotic resistance. The impact of chlamydial infection and antibiotic misuse should not be underestimated in public health. This study explores the possibility of new therapeutic techniques, including a review of recent studies on preventing and suppressing chlamydial infection by non-antibiotic compounds.
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Affiliation(s)
- Chen Hou
- School of Basic Medicine, Hengyang Medical College, Institute of Pathogenic Biology, University of South China, Hengyang, China
| | - Yingqi Jin
- School of Basic Medicine, Hengyang Medical College, Institute of Pathogenic Biology, University of South China, Hengyang, China
| | - Hua Wu
- Department of Clinical Laboratory, Affiliated Hengyang Hospital of Southern Medical University, Hengyang Central Hospital, Hengyang, China
| | - Pengyi Li
- School of Basic Medicine, Hengyang Medical College, Institute of Pathogenic Biology, University of South China, Hengyang, China
| | - Longyun Liu
- School of Basic Medicine, Hengyang Medical College, Institute of Pathogenic Biology, University of South China, Hengyang, China
| | - Kang Zheng
- Department of Clinical Laboratory, Affiliated Hengyang Hospital of Southern Medical University, Hengyang Central Hospital, Hengyang, China,*Correspondence: Kang Zheng
| | - Chuan Wang
- School of Basic Medicine, Hengyang Medical College, Institute of Pathogenic Biology, University of South China, Hengyang, China,Chuan Wang
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Porras G, Chassagne F, Lyles JT, Marquez L, Dettweiler M, Salam AM, Samarakoon T, Shabih S, Farrokhi DR, Quave CL. Ethnobotany and the Role of Plant Natural Products in Antibiotic Drug Discovery. Chem Rev 2021; 121:3495-3560. [PMID: 33164487 PMCID: PMC8183567 DOI: 10.1021/acs.chemrev.0c00922] [Citation(s) in RCA: 138] [Impact Index Per Article: 46.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The crisis of antibiotic resistance necessitates creative and innovative approaches, from chemical identification and analysis to the assessment of bioactivity. Plant natural products (NPs) represent a promising source of antibacterial lead compounds that could help fill the drug discovery pipeline in response to the growing antibiotic resistance crisis. The major strength of plant NPs lies in their rich and unique chemodiversity, their worldwide distribution and ease of access, their various antibacterial modes of action, and the proven clinical effectiveness of plant extracts from which they are isolated. While many studies have tried to summarize NPs with antibacterial activities, a comprehensive review with rigorous selection criteria has never been performed. In this work, the literature from 2012 to 2019 was systematically reviewed to highlight plant-derived compounds with antibacterial activity by focusing on their growth inhibitory activity. A total of 459 compounds are included in this Review, of which 50.8% are phenolic derivatives, 26.6% are terpenoids, 5.7% are alkaloids, and 17% are classified as other metabolites. A selection of 183 compounds is further discussed regarding their antibacterial activity, biosynthesis, structure-activity relationship, mechanism of action, and potential as antibiotics. Emerging trends in the field of antibacterial drug discovery from plants are also discussed. This Review brings to the forefront key findings on the antibacterial potential of plant NPs for consideration in future antibiotic discovery and development efforts.
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Affiliation(s)
- Gina Porras
- Center for the Study of Human Health, Emory University, 1557 Dickey Dr., Atlanta, Georgia 30322
| | - François Chassagne
- Center for the Study of Human Health, Emory University, 1557 Dickey Dr., Atlanta, Georgia 30322
| | - James T. Lyles
- Center for the Study of Human Health, Emory University, 1557 Dickey Dr., Atlanta, Georgia 30322
| | - Lewis Marquez
- Molecular and Systems Pharmacology Program, Laney Graduate School, Emory University, 615 Michael St., Whitehead 115, Atlanta, Georgia 30322
| | - Micah Dettweiler
- Department of Dermatology, Emory University, 615 Michael St., Whitehead 105L, Atlanta, Georgia 30322
| | - Akram M. Salam
- Molecular and Systems Pharmacology Program, Laney Graduate School, Emory University, 615 Michael St., Whitehead 115, Atlanta, Georgia 30322
| | - Tharanga Samarakoon
- Emory University Herbarium, Emory University, 1462 Clifton Rd NE, Room 102, Atlanta, Georgia 30322
| | - Sarah Shabih
- Center for the Study of Human Health, Emory University, 1557 Dickey Dr., Atlanta, Georgia 30322
| | - Darya Raschid Farrokhi
- Center for the Study of Human Health, Emory University, 1557 Dickey Dr., Atlanta, Georgia 30322
| | - Cassandra L. Quave
- Center for the Study of Human Health, Emory University, 1557 Dickey Dr., Atlanta, Georgia 30322
- Emory University Herbarium, Emory University, 1462 Clifton Rd NE, Room 102, Atlanta, Georgia 30322
- Department of Dermatology, Emory University, 615 Michael St., Whitehead 105L, Atlanta, Georgia 30322
- Molecular and Systems Pharmacology Program, Laney Graduate School, Emory University, 615 Michael St., Whitehead 115, Atlanta, Georgia 30322
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Preclinical Evaluation of the Antimicrobial-Immunomodulatory Dual Action of Xenohormetic Molecules against Haemophilus influenzae Respiratory Infection. Biomolecules 2019; 9:biom9120891. [PMID: 31861238 PMCID: PMC6995536 DOI: 10.3390/biom9120891] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/11/2019] [Accepted: 12/12/2019] [Indexed: 12/12/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is characterized by abnormal inflammation and impaired airway immunity, providing an opportunistic platform for nontypeable Haemophilus influenzae (NTHi) infection. In this context, therapies targeting not only overactive inflammation without significant adverse effects, but also infection are of interest. Increasing evidence suggests that polyphenols, plant secondary metabolites with anti-inflammatory and antimicrobial properties, may be protective. Here, a Cistus salviifolius plant extract containing quercetin, myricetin, and punicalagin was shown to reduce NTHi viability. Analysis of these polyphenols revealed that quercetin has a bactericidal effect on NTHi, does not display synergies, and that bacteria do not seem to develop resistance. Moreover, quercetin lowered NTHi airway epithelial invasion through a mechanism likely involving inhibition of Akt phosphorylation, and reduced the expression of bacterially-induced proinflammatory markers il-8, cxcl-1, il-6, pde4b, and tnfα. We further tested quercetin’s effect on NTHi murine pulmonary infection, showing a moderate reduction in bacterial counts and significantly reduced expression of proinflammatory genes, compared to untreated mice. Quercetin administration during NTHi infection on a zebrafish septicemia infection model system showed a bacterial clearing effect without signs of host toxicity. In conclusion, this study highlights the therapeutic potential of the xenohormetic molecule quercetin against NTHi infection.
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Identification of Potential Metabolites Mediating Bird's Selective Feeding on Prunus mira Flowers. BIOMED RESEARCH INTERNATIONAL 2019; 2019:1395480. [PMID: 31341887 PMCID: PMC6612375 DOI: 10.1155/2019/1395480] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 06/04/2019] [Indexed: 01/18/2023]
Abstract
In peach orchards, birds severely damage flowers during blossom season, decreasing the fruit yield potential. However, the wild peach species Prunus mira shows intraspecific variations of bird damage, indicating that some of the wild trees have developed strategies to avert bird foraging. Motivated by this observation, we formulated the present study to identify the potential flower metabolites mediating the bird's selective feeding behavior in P. mira flowers. The birds' preferred (FG) and avoided (BFT) flowers were collected from wild P. mira trees at three different locations, and their metabolite contents were detected, quantified, and compared. The widely-targeted metabolomics approach was employed to detect a diverse set of 603 compounds, predominantly, organic acids, amino acid derivatives, nucleotide and its derivatives, and flavones. By quantitatively comparing the metabolite contents between FG and BFT, three candidate metabolites, including Eriodictiol 6-C-hexoside 8-C-hexoside-O-hexoside, Luteolin O-hexosyl-O-hexosyl-O-hexoside, and Salvianolic acid A, were differentially accumulated and showed the same pattern across the three sampling locations. Distinctly, Salvianolic acid A was abundantly accumulated in FG but absent in BFT, implying that it may be the potential metabolite attracting birds in some P. mira flowers. Overall, this study sheds light on the diversity of the floral metabolome in P. mira and suggests that the bird's selective feeding behavior may be mediated by variations in floral metabolite contents.
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Rungsung S, Singh TU, Rabha DJ, Kumar T, Cholenahalli Lingaraju M, Parida S, Paul A, Sahoo M, Kumar D. Luteolin attenuates acute lung injury in experimental mouse model of sepsis. Cytokine 2018; 110:333-343. [DOI: 10.1016/j.cyto.2018.03.042] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 03/24/2018] [Accepted: 03/30/2018] [Indexed: 12/30/2022]
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Zhang H, Lu D, Li X, Feng Y, Cui Q, Song X. Heavy ion mutagenesis combined with triclosan screening provides a new strategy for improving the arachidonic acid yield in Mortierella alpina. BMC Biotechnol 2018; 18:23. [PMID: 29716562 PMCID: PMC5930740 DOI: 10.1186/s12896-018-0437-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 04/18/2018] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Arachidonic acid (ARA), which is a ω-6 polyunsaturated fatty acid, has a wide range of biological activities and is an essential component of cellular membranes in some human tissues. Mortierella alpina is the best strain for industrial production of ARA. To increase its yield of arachidonic acid, heavy ion beam irradiation mutagenesis of Mortierella alpina was carried out in combination with triclosan and octyl gallate treatment. RESULTS The obtained mutant strain F-23 ultimately achieved an ARA yield of 5.26 g L- 1, which is 3.24 times higher than that of the wild-type strain. In addition, quantitative real-time PCR confirmed that the expression levels of fatty acid synthase (FAS), Δ5-desaturase, Δ6-desaturase, and Δ9-desaturase were all significantly up-regulated in the mutant F-23 strain, especially Δ6- and Δ9-desaturase, which were up-regulated 3- and 2-fold, respectively. CONCLUSIONS This study confirmed a feasible mutagenesis breeding strategy for improving ARA production and provided a mutant of Mortierella alpina with high ARA yield.
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Affiliation(s)
- Huidan Zhang
- Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, Shandong, China.,Qingdao Engineering Laboratory of Single Cell Oil, Qingdao, 266101, Shandong, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Dong Lu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
| | - Xin Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
| | - Yingang Feng
- Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, Shandong, China.,Qingdao Engineering Laboratory of Single Cell Oil, Qingdao, 266101, Shandong, China
| | - Qiu Cui
- Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, Shandong, China.,Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, Shandong, China.,Qingdao Engineering Laboratory of Single Cell Oil, Qingdao, 266101, Shandong, China
| | - Xiaojin Song
- Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, Shandong, China. .,Qingdao Engineering Laboratory of Single Cell Oil, Qingdao, 266101, Shandong, China.
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Zigangirova NA, Morgunova EY, Fedina ED, Shevyagina NV, Borovaya TG, Zhukhovitsky VG, Kyle NH, Petyaev IM. Lycopene Inhibits Propagation of Chlamydia Infection. SCIENTIFICA 2017; 2017:1478625. [PMID: 28948060 PMCID: PMC5602621 DOI: 10.1155/2017/1478625] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 06/11/2017] [Indexed: 06/07/2023]
Abstract
Chlamydiaceae is a family of obligate intracellular pathogenic bacteria with similar developmental cycles and cell biology responsible for a wide range of diseases in different hosts including genital and eye inflammatory diseases, arthritis, and inflammatory diseases of the respiratory and cardiovascular systems. In the present paper, we report that lycopene, one of the main dietary carotenoids, which is present in tomato and some other fruits, has a strong inhibitory effect on C. trachomatis and C. pneumoniae infections in alveolar macrophages. This finding was documented by both immunofluorescence analysis and electron microscopy. It was noted that lycopene treatment inhibited intracellular phase of the chlamydial developmental cycle and resulted in a significant loss of infectious progeny. The antichlamydial effect of lycopene was also confirmed in a clinical setting. There was a significant reduction of IgG antibodies against C. pneumoniae in the serum of volunteers treated for a month with oral ingestion of 7 mg of lycopene. Additional studies are needed to further explore the antichlamydial activity of lycopene and its possible effect on C. pneumoniae in relation to antichlamydial activity of lycopene to mechanisms of atherosclerosis.
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Affiliation(s)
- Naylia A. Zigangirova
- Gamaleya Center of Epidemiology and Microbiology, Ministry of Health, Moscow, Russia
| | - Elena Y. Morgunova
- Gamaleya Center of Epidemiology and Microbiology, Ministry of Health, Moscow, Russia
| | - Elena D. Fedina
- Gamaleya Center of Epidemiology and Microbiology, Ministry of Health, Moscow, Russia
| | - Natalia V. Shevyagina
- Gamaleya Center of Epidemiology and Microbiology, Ministry of Health, Moscow, Russia
| | - Tatiana G. Borovaya
- Gamaleya Center of Epidemiology and Microbiology, Ministry of Health, Moscow, Russia
| | | | - Nigel H. Kyle
- Lycotec Ltd., Granta Park Campus, Cambridge CB21 6GP, UK
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13
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Matos AM, Cristóvão JS, Yashunsky DV, Nifantiev NE, Viana AS, Gomes CM, Rauter AP. Synthesis and effects of flavonoid structure variation on amyloid-β aggregation. PURE APPL CHEM 2017. [DOI: 10.1515/pac-2017-0201] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
AbstractDietary flavonoids and synthetic derivatives have a well-known potential for biomedical applications. In this perspective, we report herein new methodologies to access chrysin and 5,7-dihydroxychromone, and these structures were combined with those of naturally occurring quercetin, luteolin, (+)-dihydroquercetin and apigenin to assemble a set of polyphenols with structure variations for in vitro testing over the aggregation of Alzheimer’s disease (AD) amyloid peptide Aβ1−42. Using thioflavin-T (ThT) monitored kinetics and subsequent mechanistic analysis by curve fitting, we show that catechol-type flavonoids reduce Aβ1−42 fibril content by 30% at molar ratios over 10. Without affecting secondary nucleation, these compounds accelerate primary nucleation events responsible for early primary oligomer formation, putatively redirecting the latter into off-pathway aggregates. Atomic force microscopy (AFM) imaging of reaction end-points allowed a comprehensive topographical analysis of amyloid aggregate populations formed in the presence of each compound. Formation of Aβ1−42 small oligomers, regarded as the most toxic amyloid structures, seems to be limited by flavonoids with a C2 phenyl group, while flavonol 3-OH is not a beneficial structural feature. Overall, the diversity of structural variations within flavonoids opens avenues for their development as chemical tools in the treatment of AD by tackling the formation and distribution of neurotoxic oligomers species.
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Affiliation(s)
- Ana M. Matos
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa and Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, Campo Grande, 1749-016 Lisboa, Portugal
- CEDOC Chronic Diseases, Nova Medical School, Rua Câmara Pestana n° 6, 6-A, CEDOC II, 1150-082, Lisboa, Portugal
| | - Joana S. Cristóvão
- Biosystems and Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa; Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Dmitry V. Yashunsky
- Laboratory of Glycoconjugate Chemistry, N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky, Prospect 47, 119991 Moscow, Russian Federation
| | - Nikolay E. Nifantiev
- Laboratory of Glycoconjugate Chemistry, N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky, Prospect 47, 119991 Moscow, Russian Federation
| | - Ana S. Viana
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa and Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, Campo Grande, 1749-016 Lisboa, Portugal
| | - Cláudio M. Gomes
- Biosystems and Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, and Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
| | - Amélia P. Rauter
- Centro de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa and Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, Campo Grande, 1749-016 Lisboa, Portugal
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14
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Pharmacokinetics, tissue distribution and excretion of luteolin and its major metabolites in rats: Metabolites predominate in blood, tissues and are mainly excreted via bile. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.05.056] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
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15
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Hanski L, Vuorela P. Lead Discovery Strategies for Identification of Chlamydia pneumoniae Inhibitors. Microorganisms 2016; 4:E43. [PMID: 27916800 PMCID: PMC5192526 DOI: 10.3390/microorganisms4040043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 10/28/2016] [Accepted: 11/04/2016] [Indexed: 12/18/2022] Open
Abstract
Throughout its known history, the gram-negative bacterium Chlamydia pneumoniae has remained a challenging target for antibacterial chemotherapy and drug discovery. Owing to its well-known propensity for persistence and recent reports on antimicrobial resistence within closely related species, new approaches for targeting this ubiquitous human pathogen are urgently needed. In this review, we describe the strategies that have been successfully applied for the identification of nonconventional antichlamydial agents, including target-based and ligand-based virtual screening, ethnopharmacological approach and pharmacophore-based design of antimicrobial peptide-mimicking compounds. Among the antichlamydial agents identified via these strategies, most translational work has been carried out with plant phenolics. Thus, currently available data on their properties as antichlamydial agents are described, highlighting their potential mechanisms of action. In this context, the role of mitogen-activated protein kinase activation in the intracellular growth and survival of C. pneumoniae is discussed. Owing to the complex and often complementary pathways applied by C. pneumoniae in the different stages of its life cycle, multitargeted therapy approaches are expected to provide better tools for antichlamydial therapy than agents with a single molecular target.
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Affiliation(s)
- Leena Hanski
- Pharmaceutical Biology, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland.
| | - Pia Vuorela
- Pharmaceutical Biology, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland.
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16
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Brown MA, Potroz MG, Teh SW, Cho NJ. Natural Products for the Treatment of Chlamydiaceae Infections. Microorganisms 2016; 4:E39. [PMID: 27754466 PMCID: PMC5192522 DOI: 10.3390/microorganisms4040039] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 10/04/2016] [Accepted: 10/07/2016] [Indexed: 12/27/2022] Open
Abstract
Due to the global prevalence of Chlamydiae, exploring studies of diverse antichlamydial compounds is important in the development of effective treatment strategies and global infectious disease management. Chlamydiaceae is the most widely known bacterial family of the Chlamydiae order. Among the species in the family Chlamydiaceae, Chlamydia trachomatis and Chlamydia pneumoniae cause common human diseases, while Chlamydia abortus, Chlamydia psittaci, and Chlamydia suis represent zoonotic threats or are endemic in human food sources. Although chlamydial infections are currently manageable in human populations, chlamydial infections in livestock are endemic and there is significant difficulty achieving effective treatment. To combat the spread of Chlamydiaceae in humans and other hosts, improved methods for treatment and prevention of infection are needed. There exist various studies exploring the potential of natural products for developing new antichlamydial treatment modalities. Polyphenolic compounds can inhibit chlamydial growth by membrane disruption, reestablishment of host cell apoptosis, or improving host immune system detection. Fatty acids, monoglycerides, and lipids can disrupt the cell membranes of infective chlamydial elementary bodies (EBs). Peptides can disrupt the cell membranes of chlamydial EBs, and transferrins can inhibit chlamydial EBs from attachment to and permeation through the membranes of host cells. Cellular metabolites and probiotic bacteria can inhibit chlamydial infection by modulating host immune responses and directly inhibiting chlamydial growth. Finally, early stage clinical trials indicate that polyherbal formulations can be effective in treating chlamydial infections. Herein, we review an important body of literature in the field of antichlamydial research.
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Affiliation(s)
- Mika A Brown
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
- Centre for Biomimetic Sensor Science, 50 Nanyang Drive, Singapore 637553, Singapore.
- Department of Chemical Engineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA.
| | - Michael G Potroz
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
- Centre for Biomimetic Sensor Science, 50 Nanyang Drive, Singapore 637553, Singapore.
| | - Seoh-Wei Teh
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
- Centre for Biomimetic Sensor Science, 50 Nanyang Drive, Singapore 637553, Singapore.
| | - Nam-Joon Cho
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
- Centre for Biomimetic Sensor Science, 50 Nanyang Drive, Singapore 637553, Singapore.
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17
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Potroz MG, Cho NJ. Natural products for the treatment of trachoma and Chlamydia trachomatis. Molecules 2015; 20:4180-203. [PMID: 25751782 PMCID: PMC6272789 DOI: 10.3390/molecules20034180] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Revised: 02/11/2015] [Accepted: 02/24/2015] [Indexed: 11/29/2022] Open
Abstract
The neglected tropical disease (NTD) trachoma is currently the leading cause of eye disease in the world, and the pathogenic bacteria causing this condition, Chlamydia trachomatis, is also the most common sexually transmitted pathogenic bacterium. Although the serovars of this bacterial species typically vary between ocular and genital infections there is a clear connection between genital C. trachomatis infections and the development of trachoma in infants, such that the solutions to these infections are closely related. It is the unique life cycle of the C. trachomatis bacteria which primarily leads to chronic infections and challenges in treatment using conventional antibiotics. This life cycle involves stages of infective elementary bodies (EBs) and reproductive reticulate bodies (RBs). Most antibiotics only target the reproductive RBs and this often leads to the need for prolonged therapy which facilitates the development of drug resistant pathogens. It is through combining several compounds to obtain multiple antimicrobial mechanisms that we are most likely to develop a reliable means to address all these issues. Traditional and ethnobotanical medicine provides valuable resources for the development of novel formulations and treatment regimes based on synergistic and multi-compound therapy. In this review we intend to summarize the existing literature on the application of natural compounds for controlling trachoma and inhibiting chlamydial bacteria and explore the potential for the development of new treatment modalities.
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Affiliation(s)
- Michael G Potroz
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
- Centre for Biomimetic Sensor Science, 50 Nanyang Drive, Singapore 637553, Singapore.
| | - Nam-Joon Cho
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
- Centre for Biomimetic Sensor Science, 50 Nanyang Drive, Singapore 637553, Singapore.
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18
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Hanski L, Vuorela PM. Recent advances in technologies for developing drugs againstChlamydia pneumoniae. Expert Opin Drug Discov 2014; 9:791-802. [DOI: 10.1517/17460441.2014.915309] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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19
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Kalaitzaki A, Emo M, Stébé MJ, Xenakis A, Papadimitriou V. Biocompatible nanodispersions as delivery systems of food additives: A structural study. Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.08.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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20
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Kapp K, Hakala E, Orav A, Pohjala L, Vuorela P, Püssa T, Vuorela H, Raal A. Commercial peppermint (Mentha×piperita L.) teas: Antichlamydial effect and polyphenolic composition. Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.02.015] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Rizzo A, Carratelli CR, Losacco A, Iovene MR. Antimicrobial effect of natural polyphenols with or without antibiotics on Chlamydia pneumoniae infection in vitro. Microb Drug Resist 2013; 20:1-10. [PMID: 23952319 DOI: 10.1089/mdr.2013.0024] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Chlamydia pneumoniae is a human pathogen that causes multiple diseases worldwide. Despite appropriate therapy with antichlamydial antibiotics, chronic exacerbated diseases often occur and lead to serious sequelae. The use of the macrolide clarithromycin and the fluoroquinolone ofloxacin has improved the treatment of chlamydial infection, but therapy failure is still a major problem. In this work, we studied the pretreatment with natural polyphenols and subsequent treatment with clarithromycin or ofloxacin. The phenolic compounds resveratrol and quercetin improved the antichlamydial effect of clarithromycin and ofloxacin. In particular, resveratrol at 40 μM and quercetin at 20 μM exhibited significant growth inhibition on C. pneumoniae in presence of clarithromycin or ofloxacin compared to controls. In addition, we demonstrated that both resveratrol and quercetin decreased IL-17 and IL-23 production in a time-dependent manner in C. pneumoniae-infected cells. The results showed a particularly strong inhibition of the IL-23 levels released with combined treatment of resveratrol or quercetin and ofloxacin or clarithromycin, suggesting that the combined treatment may afford a synergistic effect in controlling Chlamydia infections.
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Affiliation(s)
- Antonietta Rizzo
- Section of Microbiology and Clinical Microbiology, Department of Experimental Medicine, Faculty of Medicine and Surgery, Second University of Naples , Naples, Italy
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22
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Orhan F, Gulluce M, Ozkan H, Alpsoy L. Determination of the antigenotoxic potencies of some luteolin derivatives by using a eukaryotic cell system, Saccharomyces cerevisiae. Food Chem 2013; 141:366-72. [PMID: 23768369 DOI: 10.1016/j.foodchem.2013.02.089] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 01/10/2013] [Accepted: 02/21/2013] [Indexed: 12/29/2022]
Abstract
In this study, we aimed to examine the mutagenic and antimutagenic potencies of three luteolin derivatives (luteolin-7-O-glucoside, luteolin-7-O-rutinoside and luteolin-7-O-glucuronide) by using a eukaryotic cell system, Saccharomyces cerevisiae (RS112). In the antimutagenicity assays, these luteolin derivatives showed antimutagenic effects in deletion and intrachromosomal recombination events against ethyl methanesulfonate and acridine mutagen agents. In deletion events, the highest inhibition rates for luteolin-7-O-glucoside, luteolin-7-O-rutinoside and luteolin-7-O-glucuronide against ethyl methanesulfonate were 57.6%, 58.3% and 62.5%, respectively. Likewise, the highest inhibition rates for luteolin-7-O-glucoside, luteolin-7-O-rutinoside and luteolin-7-O-glucuronide against acridin were 21.8%, 22.4% and 23.6%, respectively. Our findings showed that these luteolin derivatives have stronger antimutagenic properties against ethyl methanesulfonate compared to the acridine mutagen agent.
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Affiliation(s)
- Furkan Orhan
- Agri Ibrahim Cecen University, Central Research and Application Laboratories, Agri TR-04100, Turkey
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23
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Salin O, Törmäkangas L, Leinonen M, Saario E, Hagström M, Ketola RA, Saikku P, Vuorela H, Vuorela PM. Corn mint (Mentha arvensis) extract diminishes acute Chlamydia pneumoniae infection in vitro and in vivo. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:12836-42. [PMID: 22073967 DOI: 10.1021/jf2032473] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Corn mint ( Mentha arvensis ) provides a good source of natural phenols such as flavone glycosides and caffeic acid derivatives, which may have prophylactic properties against inflammations. This study investigated whether corn mint extract would be beneficial against a universal respiratory tract pathogen, Chlamydia pneumoniae , infection. The extract inhibited the growth of C. pneumoniae CWL-029 in vitro in a dose-dependent manner. The inhibition was confirmed against a clinical isolate K7. The phenolic composition of the extract was analyzed by UPLC-ESI/Q-TOF/MS, the main components being linarin and rosmarinic acid. These compounds were active in vitro against C. pneumoniae. Linarin completely inhibited the growth at 100 μM. Inbred C57BL/6J mice were inoculated with C. pneumoniae K7. M. arvensis extract was given intraperitoneally once daily for 3 days prior to inoculation and continued for 10 days postinfection. The extract was able to diminish the inflammatory parameters related to C. pneumoniae infection and significantly (p = 0.019) lowered the number of C. pneumoniae genome equivalents detected by PCR at biologically relevant amounts.
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Affiliation(s)
- Olli Salin
- Pharmaceutical Sciences, Department of Biosciences, Abo Akademi University, BioCity, Artillerigatan 6 A, FI-20520 Turku, Finland
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24
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Zhang Y, Cao Y, Duan H, Wang H, He L. Imperatorin prevents cardiac hypertrophy and the transition to heart failure via NO-dependent mechanisms in mice. Fitoterapia 2011; 83:60-6. [PMID: 21983344 DOI: 10.1016/j.fitote.2011.09.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Revised: 09/12/2011] [Accepted: 09/17/2011] [Indexed: 10/17/2022]
Abstract
Augmented endothelial nitric oxide (NO) synthase (eNOS) signaling has been reported to be associated with improvements in cardiac remodeling, and NO levels have been shown to be related to cardiac hypertrophy and heart failure. Imperatorin, a dietary furanocoumarin, has been shown to prevent cardiac hypertrophy in the spontaneous hypertension rats (SHR). Thus, we aimed to clarify whether imperatorin attenuates both cardiac hypertrophy and heart failure via the NO-signaling pathway. In neonatal mouse cardiac myocytes, imperatorin inhibited protein synthesis stimulated by either isoproterenol or phenylephrine, which was unchanged by NG-nitro-L-arginine methyl ester (L-NAME). Four weeks after transverse aortic constriction (TAC) on Kunming (KM) male mice, the ratio of heart weight to body weight was lower after imperatorin treatment than in controls (6.60 ± 0.35 mg/g in TAC, 4.54 ± 0.29 mg/g with imperatorin 15 mg kg(-1)d(-1), ig, P<0.01); similar changes in the ratio of lung weight to body weight (7.30 ± 0.85 mg/g in TAC, 5.42 ± 0.51 mg/g with imperatorin 15 mg kg(-1)d(-1), ig) and the myocardial fibrosis. All of these improvements were blunted by L-NAME. Imperatorin treatment significantly activated phosphorylation of eNOS. Myocardial mRNA levels of natriuretic peptide precursor type B and protein inhibitor of NO synthase, which were increased in the TAC mice, were decreased in the imperatorin-treated ones. Imperatorin can attenuate cardiac hypertrophy both in vivo and in vitro, and halt the process leading from hypertrophy to heart failure by a NO-mediated pathway.
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Affiliation(s)
- Yan Zhang
- School of Medicine, Xi'an Jiaotong University, Xi'an, PR China
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25
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Salin OP, Pohjala LL, Saikku P, Vuorela HJ, Leinonen M, Vuorela PM. Effects of coadministration of natural polyphenols with doxycycline or calcium modulators on acute Chlamydia pneumoniae infection in vitro. J Antibiot (Tokyo) 2011; 64:747-52. [DOI: 10.1038/ja.2011.79] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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26
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Kao TK, Ou YC, Lin SY, Pan HC, Song PJ, Raung SL, Lai CY, Liao SL, Lu HC, Chen CJ. Luteolin inhibits cytokine expression in endotoxin/cytokine-stimulated microglia. J Nutr Biochem 2011; 22:612-24. [DOI: 10.1016/j.jnutbio.2010.01.011] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2009] [Revised: 01/14/2010] [Accepted: 01/25/2010] [Indexed: 12/30/2022]
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27
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Chen CY, Peng WH, Wu LC, Wu CC, Hsu SL. Luteolin ameliorates experimental lung fibrosis both in vivo and in vitro: implications for therapy of lung fibrosis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:11653-61. [PMID: 20958047 DOI: 10.1021/jf1031668] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Lonicera japonica (Caprifoliaceae) has been known as an anti-inflammatory herb in traditional Chinese medicine for thousands of years and is used constantly for upper respiratory tract infections. Luteolin, an active flavonoid compound isolated from Lonicera japonica, has a spectrum of biological activities, especially with antioxidative and anti-inflammatory properties. However, whether luteolin has a direct inhibitory effect on lung fibrosis has not been established. In this study, we examined the effects of luteolin on lung fibrosis both in vivo and in vitro. We found that oral administration of luteolin (10 mg/kg) efficiently suppressed the neutrophil infiltration as well as TNF-α and IL-6 elevation in the bronchoalveolar lavage fluid in bleomycin-instilled C57BL/6J mice. Luteolin also alleviated collagen deposition, TGF-β1 expression, and lung fibrosis upon bleomycin instillation. A similar tendency was observed in both early and delayed luteolin-treated groups. Next, our in vitro studies showed that luteolin inhibited TGF-β1-induced α-SMA, type I collagen, and vimentin expression in primary cultured mouse lung fibroblasts. Moreover, luteolin significantly blocked TGF-β1-mediated epithelial marker (E-cadherin) downregulation and mesenchymal cell markers (fibronectin and vimentin) upregulation, as well as retaining epithelial morphology in human alveolar epithelial-derived A549 cells. Additionally, luteolin could attenuate TGF-β1-induced Smad3 phosphorylation in both lung fibroblasts and A549 cells. These findings suggest that luteolin has a potent antifibrotic activity; this effect was mediated, at least in part, by inhibition of lung inflammation and suppression of myofibroblast differentiation as well as epithelial-to-mesenchymal transition.
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Affiliation(s)
- Chiu-Yuan Chen
- Graduate Institute of Natural Healing Sciences, Nanhua University, Chia-Yi 622, Taiwan
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28
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Lv L, Lv L, Zhang Y, Kong Q. Luteolin Prevents LPS-Induced TNF-α Expression in Cardiac Myocytes Through Inhibiting NF-κB Signaling Pathway. Inflammation 2010; 34:620-9. [DOI: 10.1007/s10753-010-9271-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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29
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Inhibitory effect of the natural product betulin and its derivatives against the intracellular bacterium Chlamydia pneumoniae. Biochem Pharmacol 2010; 80:1141-51. [PMID: 20615390 DOI: 10.1016/j.bcp.2010.06.051] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 06/28/2010] [Accepted: 06/29/2010] [Indexed: 11/22/2022]
Abstract
Chlamydia pneumoniae is a universal pathogen that has been indicated to play a part in the development of asthma, atherosclerosis and lung cancer. The complete eradication of this intracellular bacterium is in practice impossible with the antibiotics that are currently in use and studies on new antichlamydial compounds is challenging because Chlamydia research lacks the tools required for the genetic modification of this bacterium. Betulin is a natural lupane-class triterpene derived from plants with a wide variety of biological activities. This compound group thus has wide medical potentials, and in fact has been shown to be active against intracellular pathogens. For this reason, betulin and its derivatives were selected to be assayed against C. pneumoniae in the present study. Thirty-two betulin derivatives were assayed against C. pneumoniae using an acute infection model in vitro. Five promising compounds with potential lead compound characteristics were identified. Compound 24 (betulin dioxime) gave a minimal inhibitory concentration (MIC) of 1 microM against strain CWL-029 and showed activity in nanomolar concentrations, as 50% inhibition was achieved at 290 nM. The antichlamydial effect of 24 was confirmed with a clinical isolate CV-6, showing a MIC of 2.2 microM. Previous research on betulin and its derivatives has not identified such a remarkable inhibition of Gram-negative bacterial growth. Furthermore, we also demonstrated that this antichlamydial activity was not due to PLA(2) (EC 3.1.1.4) inhibition caused by the betulin derivatives.
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30
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Protective effects of luteolin against lipopolysaccharide-induced acute lung injury involves inhibition of MEK/ERK and PI3K/Akt pathways in neutrophils. Acta Pharmacol Sin 2010; 31:831-8. [PMID: 20562902 DOI: 10.1038/aps.2010.62] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
AIM To investigate whether luteolin, the major polyphenolic components of Lonicera japonica, has beneficial effects against lipopolysaccharide (LPS)-induced acute lung injury (ALI) and to determine whether the protective mechanism involves anti-inflammatory effects on neutrophils. METHODS ALI was induced with intratracheal instillation of LPS in mice. The level of ALI was determined by measuring the cell count and protein content in bronchoalveolar lavage (BAL) fluid. Neutrophils were stimulated with formyl-Met-Leu-Phe (fMLP) or LPS in vitro. Chemotaxis and superoxide anion generation were measured to evaluate neutrophil activation. The potential involvement of intracellular signaling molecules in regulating neutrophil activation was analyzed by using Western blot. RESULTS LPS induced ALI in mice, as evidenced with leukocyte infiltration and protein leakage into the lungs. Luteolin attenuated LPS-induced leukocyte infiltration and protein extravasation. In cell studies, luteolin attenuated the fMLP-induced neutrophil chemotaxis and respiratory burst (IC(50) 0.2+/-0.1 micromol/L and 2.2+/-0.8 micromol/L, respectively), but had a negligible effect on superoxide anion generation during phorbol myristate acetate stimulation. Furthermore luteolin effectively blocked MAPK/ERK kinase 1/2 (MEK), extracellular signal-regulated kinase (ERK), and Akt phosphorylation in fMLP- and LPS-stimulated neutrophils. CONCLUSION These results indicate that luteolin has beneficial effects against LPS-induced ALI in mice, and the attenuation of neutrophil chemotaxis and respiratory burst by luteolin involves the blockade of MEK-, ERK-, and Akt-related signaling cascades.
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Lin Y, Shi R, Wang X, Shen HM. Luteolin, a flavonoid with potential for cancer prevention and therapy. Curr Cancer Drug Targets 2009; 8:634-46. [PMID: 18991571 DOI: 10.2174/156800908786241050] [Citation(s) in RCA: 657] [Impact Index Per Article: 43.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Luteolin, 3',4',5,7-tetrahydroxyflavone, is a common flavonoid that exists in many types of plants including fruits, vegetables, and medicinal herbs. Plants rich in luteolin have been used in Chinese traditional medicine for treating various diseases such as hypertension, inflammatory disorders, and cancer. Having multiple biological effects such as anti-inflammation, anti-allergy and anticancer, luteolin functions as either an antioxidant or a pro-oxidant biochemically. The biological effects of luteolin could be functionally related to each other. For instance, the anti-inflammatory activity may be linked to its anticancer property. Luteolin's anticancer property is associated with the induction of apoptosis, and inhibition of cell proliferation, metastasis and angiogenesis. Furthermore, luteolin sensitizes cancer cells to therapeutic-induced cytotoxicity through suppressing cell survival pathways such as phosphatidylinositol 3'-kinase (PI3K)/Akt, nuclear factor kappa B (NF-kappaB), and X-linked inhibitor of apoptosis protein (XIAP), and stimulating apoptosis pathways including those that induce the tumor suppressor p53. These observations suggest that luteolin could be an anticancer agent for various cancers. Furthermore, recent epidemiological studies have attributed a cancer prevention property to luteolin. In this review, we summarize the progress of recent research on luteolin, with a particular focus on its anticancer role and molecular mechanisms underlying this property of luteolin.
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Affiliation(s)
- Yong Lin
- Molecular Biology and Lung Cancer Program, Lovelace Respiratory Research Institute, 2425 Ridgecrest Dr., SE, Albuquerque, NM 87108, USA.
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Lee JK, Kim SY, Kim YS, Lee WH, Hwang DH, Lee JY. Suppression of the TRIF-dependent signaling pathway of Toll-like receptors by luteolin. Biochem Pharmacol 2009; 77:1391-400. [PMID: 19426678 DOI: 10.1016/j.bcp.2009.01.009] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2008] [Accepted: 01/13/2009] [Indexed: 01/08/2023]
Abstract
Toll-like receptors (TLRs) play important roles in induction of innate immune responses for both host defense against invading pathogens and wound healing after tissue injury. Since dysregulation of TLR-mediated immune responses is closely linked to many chronic diseases, modulation of TLR activation by small molecules may have therapeutic potential against such diseases. Expression of the majority of lipopolysaccharide-induced TLR4 target genes is mediated through a MyD88-independent (TRIF-dependent) signaling pathway. In order to evaluate the therapeutic potential of the flavonoid luteolin we examined its effect on TLR-stimulated signal transduction via the TRIF-dependent pathway. Luteolin suppressed activation of Interferon regulatory factor 3 (IRF3) and NFkappaB induced by TLR3 and TLR4 agonists resulting in the decreased expression of target genes such as TNF-alpha, IL-6, IL-12, IP-10, IFNbeta, CXCL9, and IL-27 in macrophages. Luteolin attenuated ligand-independent activation of IRF3 or NFkappaB induced by TLR4, TRIF, or TBK1, while it did not inhibit TLR oligomerization. Luteolin inhibited TBK1-kinase activity and IRF3 dimerization and phosphorylation, leading to the reduction of TBK1-dependent gene expression. Structural analogs of luteolin such as quercetin, chrysin, and eriodictyol also inhibited TBK1-kinase activity and TBK1-target gene expression. These results demonstrate that TBK1 is a novel target of anti-inflammatory flavonoids resulting in the down-regulation of the TRIF-dependent signaling pathway. These results suggest that the beneficial activities of these flavonoids against inflammatory diseases may be attributed to the modulation of TLR-mediated inflammatory responses.
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Affiliation(s)
- Jun Kyung Lee
- Department of Life Science, Gwangju Institute of Science and Technology, Gwangju, 500-712, Republic of Korea
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Berryman L, Czuprynski CJ. Flavonoid treatment of murine macrophages does not alter ingestion or intracellular survival of Listeria monocytogenes. Immunopharmacol Immunotoxicol 2008; 30:217-26. [PMID: 18569079 DOI: 10.1080/08923970801946873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
It was recently reported that the aryl hydrocarbon receptor (AhR) plays a role in innate immunity to Listeria monocytogenes infection in mice. In this study the authors analyzed whether incubation of murine macrophages with various flavonoids that have agonist or antagonist activity for the AhR (beta-naphthoflavone, alpha-naphthoflavone, quercetin, luteolin) affect the uptake and survival of L. monocytogenes. Using the RAW264.7 and J774 murine macrophage cell lines and bone marrow-derived macrophages, the authors found no significant difference between flavonoid-treated and control macrophages. They also found that macrophages incubated with flavonoids alone did not exhibit a significant increase in release of tumor necrosis factor (TNF)-alpha, a crucial cytokine in anti-Listeria resistance.
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Affiliation(s)
- Lyndsey Berryman
- Department of Pathobiological Sciences, School of Veterinary Medicine, College of Agriculture and Life Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
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Abstract
The biological impact of the NF-kappaB transcriptional system in various intestinal biological processes such as cellular proliferation, differentiation and survival, inflammation, and carcinogenesis is a relatively young field of research. Less than a decade ago, reviews addressing NF-kappaB regulation and function in the intestine had to borrow concepts and hypotheses from other bodily systems such as the joints (rheumatoid arthritis), the lungs (asthma), or the cardiovascular system (systemic inflammatory states, sepsis). Since then, important progress has been made in defining the various functional aspects of NF-kappaB signaling in intestinal homeostasis and diseases, and exciting new paradigms have emerged from this research. This review will discuss the function of NF-kappaB in intestinal homeostasis and diseases in relation to injury responses and microbial colonization/infection.
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Affiliation(s)
- Thomas Karrasch
- Department of Medicine and the Center for Gastrointestinal Biology and Disease, University of North Carolina, Chapel Hill, NC, USA
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Chen CY, Peng WH, Tsai KD, Hsu SL. Luteolin suppresses inflammation-associated gene expression by blocking NF-kappaB and AP-1 activation pathway in mouse alveolar macrophages. Life Sci 2007; 81:1602-14. [PMID: 17977562 PMCID: PMC7094354 DOI: 10.1016/j.lfs.2007.09.028] [Citation(s) in RCA: 227] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2007] [Revised: 09/19/2007] [Accepted: 09/26/2007] [Indexed: 12/22/2022]
Abstract
Luteolin, a plant flavonoid, has potent anti-inflammatory properties both in vitro and in vivo. However, the molecular mechanism of luteolin-mediated immune modulation has not been fully understood. In this study, we examined the effects of luteolin on the production of nitric oxide (NO) and prostaglandin E2 (PGE2), as well as the expression of inducible NO synthase (iNOS), cyclooxygenase-2 (COX-2), tumor necrosis factor-alpha (TNF-α), and interleukin-6 (IL-6) in mouse alveolar macrophage MH-S and peripheral macrophage RAW 264.7 cells. Luteolin dose-dependently inhibited the expression and production of these inflammatory genes and mediators in macrophages stimulated with lipopolysaccharide (LPS). Semi-quantitative reverse-transcription polymerase chain reaction (RT-PCR) assay further confirmed the suppression of LPS-induced TNF- α, IL-6, iNOS and COX-2 gene expression by luteolin at a transcriptional level. Luteolin also reduced the DNA binding activity of nuclear factor-kappa B (NF-κB) in LPS-activated macrophages. Moreover, luteolin blocked the degradation of IκB-α and nuclear translocation of NF-κB p65 subunit. In addition, luteolin significantly inhibited the LPS-induced DNA binding activity of activating protein-1 (AP-1). We also found that luteolin attenuated the LPS-mediated protein kinase B (Akt) and IKK phosphorylation, as well as reactive oxygen species (ROS) production. In sum, these data suggest that, by blocking NF-κB and AP-1 activation, luteolin acts to suppress the LPS-elicited inflammatory events in mouse alveolar macrophages, and this effect was mediated, at least in part, by inhibiting the generation of reactive oxygen species. Our observations suggest a possible therapeutic application of this agent for treating inflammatory disorders in lung.
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Affiliation(s)
- Chiu-Yuan Chen
- Graduate Institute of Chinese Pharmaceutical Sciences, China Medical University, Taichung 404, Taiwan, ROC
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Karrasch T, Kim JS, Jang BI, Jobin C. The flavonoid luteolin worsens chemical-induced colitis in NF-kappaB(EGFP) transgenic mice through blockade of NF-kappaB-dependent protective molecules. PLoS One 2007; 2:e596. [PMID: 17611628 PMCID: PMC1895919 DOI: 10.1371/journal.pone.0000596] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2007] [Accepted: 06/11/2007] [Indexed: 12/21/2022] Open
Abstract
Background The flavonoid luteolin has anti-inflammatory properties both in vivo and in vitro. However, the impact of luteolin on experimental models of colitis is unknown. Methodology/Principal Findings To address the therapeutic impact of luteolin, NF-κBEGFP transgenic mice were fed a chow diet containing 2% luteolin- or isoflavone-free control chow (AIN-76), and acute colitis was induced using 3% dextran sodium sulfate (DSS). Additionally, development of spontaneous colitis was evaluated in IL-10−/−;NF-κBEGFP transgenic mice fed 2% luteolin chow diet or control chow diet. Interestingly, NF-κBEGFP transgenic mice exposed to luteolin showed worse DSS-induced colitis (weight loss, histological scores) compared to control-fed mice, whereas spontaneous colitis in IL-10−/−;NF-κBEGFP mice was significantly attenuated. Macroscopic imaging of live resected colon showed enhanced EGFP expression (NF-κB activity) in luteolin-fed mice as compared to control-fed animals after DSS exposure, while cecal EGFP expression was attenuated in luteolin-fed IL-10−/− mice. Interestingly, confocal microscopy showed that EGFP positive cells were mostly located in the lamina propria and not in the epithelium. Caspase 3 activation was significantly enhanced whereas COX-2 gene expression was reduced in luteolin-fed, DSS-exposed NF-κBEGFP transgenic mice as assessed by Western blot and immunohistochemical analysis. In vitro, luteolin sensitized colonic epithelial HT29 cells to TNFα-induced apoptosis, caspase 3 activation, DNA fragmentation and reduced TNFα-induced C-IAP1, C-IAP2 and COX-2 gene expression. Conclusions/Significance We conclude that while luteolin shows beneficial effects on spontaneous colitis, it aggravates DSS-induced experimental colitis by blocking NF-κB-dependent protective molecules in enterocytes.
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Affiliation(s)
- Thomas Karrasch
- Department of Medicine and Center for GI Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Joo-Sung Kim
- Department of Medicine and Center for GI Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Byung Ik Jang
- Department of Medicine and Center for GI Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Christian Jobin
- Department of Medicine and Center for GI Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
- * To whom correspondence should be addressed. E-mail:
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Törmäkangas L, Ketonen J, Leinonen M, Saikku P, Paakkari I. Increased prostanoid dependency of arterial relaxation in Chlamydia pneumoniae-infected mice. J Med Microbiol 2006; 55:1017-1021. [PMID: 16849721 DOI: 10.1099/jmm.0.46516-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Endothelial dysfunction plays an important role in the development of atherosclerosis. Previous studies have shown that inoculation with Chlamydia pneumoniae contributes to atherosclerotic development in rabbits and hypercholesterolaemic mice and causes endothelial dysfunction in apolipoprotein E-deficient mice. The effect of acute C. pneumoniae infection on endothelial function in normocholesterolaemic C57BL/6J mice was studied by measuring the force of contraction of the descending aorta after noradrenaline stimulation and in response to methacholine-induced relaxation. In addition, the effects of the nitric oxide synthase inhibitor N(omega)-nitro-L-arginine methyl ester (L-NAME) and the cyclooxygenase inhibitor diclofenac on relaxation were assessed. Pre-treatment of the aortas with L-NAME decreased the relaxation response in both the infected and uninfected groups and no significant difference was detected between these groups, whereas diclofenac significantly attenuated the relaxation response only in the infected animals. In conclusion, infection shifted the balance of endothelium-derived relaxing factors from nitric oxide towards vasorelaxing prostanoids in C57BL/6J mice.
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Affiliation(s)
- Liisa Törmäkangas
- National Public Health Institute (KTL), PO Box 310, FIN-90101 Oulu, Finland
| | - Juha Ketonen
- Institute of Biomedicine, University of Helsinki, Finland
| | - Maija Leinonen
- National Public Health Institute (KTL), PO Box 310, FIN-90101 Oulu, Finland
| | - Pekka Saikku
- Department of Medical Microbiology, University of Oulu, Finland
| | - Ilari Paakkari
- Institute of Biomedicine, University of Helsinki, Finland
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Leeds JA, Schmitt EK, Krastel P. Recent developments in antibacterial drug discovery: microbe-derived natural products – from collection to the clinic. Expert Opin Investig Drugs 2006; 15:211-26. [PMID: 16503759 DOI: 10.1517/13543784.15.3.211] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The pharmaceutical industry has historically relied on nature to provide compounds for antibacterial drug discovery. In recent years, several pharmaceutical companies have scaled back their efforts in natural product research. Nevertheless, the screening of natural products for antibacterial activity continues to provide excellent sources of biologically and chemically informative leads for new drugs. New technologies in high-throughput cultivation, genetic approaches to biodiversity and discovery of relatively untapped sources of natural products are expanding the ability to find novel, potent and highly selective antibacterial structures. Advances in purification, dereplication and structure elucidation, combined with the ability to chemically or biologically derivatise hits, aim to make the timeline for natural product-derived drug discovery similar or shorter than that expected for small synthetic molecules. This review addresses the strengths and shortcomings of technologies focused on microbe-derived natural products for antibacterial drug discovery and stresses the need for commitment to these approaches in order to achieve the goal of delivering safe, efficacious and high-quality medicines in the long run.
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Affiliation(s)
- Jennifer A Leeds
- Infectious Diseases Area, Novartis Institutes for BioMedical Research, Cambridge, MA 02139, USA.
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Alvesalo J, Vuorela H, Tammela P, Leinonen M, Saikku P, Vuorela P. Inhibitory effect of dietary phenolic compounds on Chlamydia pneumoniae in cell cultures. Biochem Pharmacol 2006; 71:735-41. [PMID: 16414027 DOI: 10.1016/j.bcp.2005.12.006] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2005] [Revised: 11/23/2005] [Accepted: 12/05/2005] [Indexed: 12/29/2022]
Abstract
Chlamydial infections are very common worldwide. All chlamydial species have a tendency to cause persistent infections, which have been associated to several chronic diseases including blinding trachoma, infertility and coronary heart disease (CHD). At present, no efficient treatment for the eradication of chronic chlamydial infections exists and, thus, new antichlamydial compounds are urgently needed. This study was designed to screen antichlamydial activity of natural flavonoids and other natural and structurally similar synthetic compounds against Chlamydia pneumoniae in human cell line (HL). HL cells were infected with C. pneumoniae and incubated 72 h with studied compounds. Reduction in the number of inclusions was determined with immunofluorescence staining. In vitro minimum inhibitory concentration was also determined for some of the most active compounds. Thirty seven percentage of the studied compounds (57 in total) were highly active against C. pneumoniae and all the studied compounds were non-toxic to the host cells at studied concentrations. Our study revealed direct antichlamydial effect for selected polyphenolic compounds against C. pneumoniae, in vitro. We also demonstrated the ability of some of the investigated compounds to accumulate inside cells or into cell membranes and cause inhibition, even when present only prior to infection.
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Affiliation(s)
- J Alvesalo
- Drug Discovery and Development Technology Center, Faculty of Pharmacy, P.O. Box 56, University of Helsinki, FIN-00014, Finland
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