1
|
Nayak SPRR, Basty C, Boopathi S, Dhivya LS, Alarjani KM, Gawwad MRA, Hager R, Kathiravan MK, Arockiaraj J. Furan-based Chalcone Annihilates the Multi-Drug-Resistant Pseudomonas aeruginosa and Protects Zebra Fish Against its Infection. J Microbiol 2024; 62:75-89. [PMID: 38383881 DOI: 10.1007/s12275-024-00103-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 12/22/2023] [Accepted: 12/26/2023] [Indexed: 02/23/2024]
Abstract
The emergence of carbapenem-resistant Pseudomonas aeruginosa, a multi-drug-resistant bacteria, is becoming a serious public health concern. This bacterium infects immunocompromised patients and has a high fatality rate. Both naturally and synthetically produced chalcones are known to have a wide array of biological activities. The antibacterial properties of synthetically produced chalcone were studied against P. aeruginosa. In vitro, study of the compound (chalcone derivative named DKO1), also known as (2E)-1-(5-methylfuran-2-yl)-3-(4-nitrophenyl) prop-2-en-1-one, had substantial antibacterial and biofilm disruptive action. DKO1 effectively shielded against P. aeruginosa-induced inflammation, oxidative stress, lipid peroxidation, and apoptosis in zebrafish larvae. In adult zebrafish, the treatment enhanced the chances of survivability and reduced the sickness-like behaviors. Gene expression, biochemical analysis, and histopathology studies found that proinflammatory cytokines (TNF-α, IL-1β, IL-6, iNOS) were down regulated; antioxidant enzymes such as superoxide dismutase (SOD) and catalase (CAT) levels increased, and histoarchitecture was restored in zebrafish. The data indicate that DKO1 is an effective antibacterial agent against P. aeruginosa demonstrated both in vitro and in vivo.
Collapse
Affiliation(s)
- Santosh Pushpa Ramya Ranjan Nayak
- Toxicology and Pharmacology Laboratory, Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu District, Chennai, Tamil Nadu, 603203, India
| | - Catharine Basty
- Toxicology and Pharmacology Laboratory, Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu District, Chennai, Tamil Nadu, 603203, India
| | - Seenivasan Boopathi
- Toxicology and Pharmacology Laboratory, Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu District, Chennai, Tamil Nadu, 603203, India
| | - Loganathan Sumathi Dhivya
- Dr. APJ Abdul Kalam Research Lab, Department of Pharmaceutical Chemistry, SRM College of Pharmacy, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu District, Chennai, Tamil Nadu, 603203, India
| | - Khaloud Mohammed Alarjani
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Mohamed Ragab Abdel Gawwad
- Genetics and Bioengineering, Faculty of Engineering and Natural Sciences, International University of Sarajevo, Sarajevo, 71210, Bosnia and Herzegovina
| | - Raghda Hager
- Department of Medical Microbiology and Immunology, King Salman International University, South Sinai, Egypt
| | - Muthu Kumaradoss Kathiravan
- Dr. APJ Abdul Kalam Research Lab, Department of Pharmaceutical Chemistry, SRM College of Pharmacy, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu District, Chennai, Tamil Nadu, 603203, India.
| | - Jesu Arockiaraj
- Toxicology and Pharmacology Laboratory, Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu District, Chennai, Tamil Nadu, 603203, India.
| |
Collapse
|
2
|
Oliveira LR, Trein MR, Assis LR, Rigo GV, Simões LPM, Batista VS, Macedo AJ, Trentin DS, Nascimento-Júnior NM, Tasca T, Regasini LO. Phenolic chalcones as agents against Trichomonas vaginalis. Bioorg Chem 2023; 141:106888. [PMID: 37839143 DOI: 10.1016/j.bioorg.2023.106888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 09/12/2023] [Accepted: 09/25/2023] [Indexed: 10/17/2023]
Abstract
Trichomonas vaginalis, a flagellated and anaerobic protozoan, is a causative agent of trichomoniasis. This disease is among the world's most common non-viral sexually transmitted infection. A single class drug, nitroimidazoles, is currently available for the trichomoniasis treatment. However, resistant isolates have been identified from unsuccessfully treated patients. Thus, there is a great challenge for a discovery of innovative anti-T. vaginalis agents. As part of our ongoing search for antiprotozoal chalcones, we designed and synthesized a series of 21 phenolic chalcones, which were evaluated against T. vaginalis trophozoites. Structure-activity relationship indicated hydroxyl group plays a role key in antiprotozoal activity. 4'-Hydroxychalcone (4HC) was the most active compound (IC50 = 27.5 µM) and selected for detailed bioassays. In vitro and in vivo evaluations demonstrated 4HC was not toxic against human erythrocytes and Galleria mellonella larvae. Trophozoites of T. vaginalis were treated with 4HC and did not present significant reactive oxygen species (ROS) accumulation. However, compound 4HC was able to increase ROS accumulation in neutrophils coincubated with T. vaginalis. qRT-PCR Experiments indicated that 4HC did not affect the expression of pyruvate:ferredoxin oxidoreductase (PFOR) and β-tubulin genes. In silico simulations, using purine nucleoside phosphorylase of T. vaginalis (TvPNP), corroborated 4HC as a promising ligand. Compound 4HC was able to establish interactions with residues D21, G20, M180, R28, R87 and T90 through hydrophobic interactions, π-donor hydrogen bond and hydrogen bonds. Altogether, these results open new avenues for phenolic chalcones to combat trichomoniasis, a parasitic neglected infection.
Collapse
Affiliation(s)
- Lígia R Oliveira
- Institute of Biosciences, Humanities and Exact Sciences (Ibilce), São Paulo State University (Unesp), 15054-000 São José do Rio Preto, SP, Brazil
| | - Márcia R Trein
- Faculty of Pharmacy, Federal University of Rio Grande do Sul, 90610-000 Porto Alegre, RS, Brazil
| | - Letícia R Assis
- Institute of Biosciences, Humanities and Exact Sciences (Ibilce), São Paulo State University (Unesp), 15054-000 São José do Rio Preto, SP, Brazil
| | - Graziela V Rigo
- Faculty of Pharmacy, Federal University of Rio Grande do Sul, 90610-000 Porto Alegre, RS, Brazil
| | - Leonardo P M Simões
- Institute of Chemistry, São Paulo State University (Unesp), Rua Professor Francisco Degni, 55, Jardim Quitandinha, Araraquara 14800-060, SP, Brazil
| | - Victor S Batista
- Institute of Chemistry, São Paulo State University (Unesp), Rua Professor Francisco Degni, 55, Jardim Quitandinha, Araraquara 14800-060, SP, Brazil
| | - Alexandre J Macedo
- Faculty of Pharmacy, Federal University of Rio Grande do Sul, 90610-000 Porto Alegre, RS, Brazil
| | - Danielle S Trentin
- Department of Basic Health Sciences, Federal University of Health Sciences of Porto Alegre, 90050-170 Porto Alegre, RS, Brazil
| | - Nailton M Nascimento-Júnior
- Institute of Chemistry, São Paulo State University (Unesp), Rua Professor Francisco Degni, 55, Jardim Quitandinha, Araraquara 14800-060, SP, Brazil
| | - Tiana Tasca
- Faculty of Pharmacy, Federal University of Rio Grande do Sul, 90610-000 Porto Alegre, RS, Brazil.
| | - Luis O Regasini
- Institute of Biosciences, Humanities and Exact Sciences (Ibilce), São Paulo State University (Unesp), 15054-000 São José do Rio Preto, SP, Brazil.
| |
Collapse
|
3
|
Takla SS, Shawky E, Mahgoub YA, Darwish RS. Tracking the effect of roasting and fermentation on the metabolites of licorice root (Glycyrrhiza glabra L.) using UPLC-MS analysis combined with multivariate statistical analysis. BMC Complement Med Ther 2023; 23:419. [PMID: 37986059 PMCID: PMC10662527 DOI: 10.1186/s12906-023-04239-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 10/30/2023] [Indexed: 11/22/2023] Open
Abstract
BACKGROUND Roasting, honey-roasting and fermentation are the most common pre-processing procedures of licorice roots. They were shown to noticeably change the composition of extracts. In this work, the common alterations in licorice secondary metabolites by processing were interpreted. Comprehensive metabolic profiling of different studied samples was undergone. METHODS UPLC-QqQ-MS/MS analysis coupled to various chemometric analysis models was implemented to unravel the effect of different pre-processing procedures on the chemical profile of licorice samples. RESULTS UPLC-QqQ-MS/MS analysis designated 133 chromatographic peaks with saponins, flavonoids, chalcones and pterocarpans being the most abundant groups. Triterpene saponins dominated the secondary metabolites in the aqueous extracts, with fermented samples showing the highest relative amounts. Meanwhile the ethanol extracts showed significant amounts of chalcones. Melanoidins were only detected in roasted and honey roasted samples. Multivariate models indicated that roasting of samples induced a greater effect on the polar metabolites rather than nonpolar ones. Variable of importance (VIP) plot indicated that glycyrrhizin and its hydrolysis product glycyrrhetinic acid, trihdroxychalcone diglycoside, glabrone and glabridin are the main chemical features responsible for the discrimination of samples. CONCLUSION Coupling UPLC-MS/MS to multivariate analysis was a successful tool that unveiled the significant effect of different pre-processing methods on the chemical profile of processed and unprocessed licorice samples. Moreover, such coupling unraveled the discriminatory chemical compounds among tested samples that can be employed as markers for the processing procedure of licorice.
Collapse
Affiliation(s)
- Sarah S Takla
- Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University, Alkhartoom square, Egypt, Alexandria, 21521, Egypt
| | - Eman Shawky
- Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University, Alkhartoom square, Egypt, Alexandria, 21521, Egypt.
| | - Yasmin A Mahgoub
- Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University, Alkhartoom square, Egypt, Alexandria, 21521, Egypt
| | - Reham S Darwish
- Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University, Alkhartoom square, Egypt, Alexandria, 21521, Egypt
| |
Collapse
|
4
|
S Ramadan N, M Fayek N, M El-Sayed M, S Mohamed R, A Wessjohann L, Farag MA. Averrhoa carambola L. fruit and stem metabolites profiling and immunostimulatory action mechanisms against cyclosporine induced toxic effects in rat model as analyzed using UHPLC/MS-MS-based chemometrics and bioassays. Food Chem Toxicol 2023; 179:114001. [PMID: 37619832 DOI: 10.1016/j.fct.2023.114001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 08/15/2023] [Accepted: 08/20/2023] [Indexed: 08/26/2023]
Abstract
The Averrhoa carambola L. tree encompasses a myriad of phytochemicals contributing to its nutritional and health benefits. The current study aims at investigating the A. carambola L. the metabolite profile grown in tropical and temperate regions represented by fruit and stem, for the first time using UPLC/MS-based molecular networking and chemometrics. Asides, assessment of the immunostimulatory effect of ripe fruit and stem, was compared in relation to metabolite fingerprints. Eighty metabolites were identified, 8 of which are first-time to be reported including 3 dihydrochalcone-C-glycosides, 4 flavonoids, and one phenolic. Multivariate data analysis revealed dihydrochalcones as origin-discriminating metabolites between temperate and tropical grown fruits. Further, an in vivo immunomodulatory assay in a cyclosporine A-induced rat model revealed a potential immune-enhancing effect as manifested by down-regulation of inflammatory markers (IL-6, INF-γ, IL-1, TLR4, and ESR) concurrent with the up-regulation of CD4 level and the CD4/CD8 ratio. Moreover, both extracts suppressed elevation of liver and kidney functions in serum as well as reduction in oxidative stress with concurrent increased levels of T-protein, albumin, globulin, and A/G ratio. This study pinpoints differences in secondary metabolite profiles amongst A. carambola L. accessions from different origins and organ type and its immunomodulatory action mechanisms.
Collapse
Affiliation(s)
- Nehal S Ramadan
- Chemistry of Tanning Materials and Leather Technology Department, National Research Centre, Dokki, Cairo, 12622, Egypt
| | - Nesrin M Fayek
- Pharmacognosy Department, College of Pharmacy, Cairo University, Kasr El Aini St., 11562, Cairo, Egypt
| | - Magdy M El-Sayed
- Dairy Science Department, National Research Centre, Dokki, Cairo, 12622, Egypt
| | - Rasha S Mohamed
- Nutrition and Food Science Department, National Research Centre, Dokki, Cairo, 12622, Egypt
| | - Ludger A Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle (Saale), Germany
| | - Mohamed A Farag
- Pharmacognosy Department, College of Pharmacy, Cairo University, Kasr El Aini St., 11562, Cairo, Egypt.
| |
Collapse
|
5
|
Poolsri W, Noitem R, Jutabha P, Raveesunthornkiat M, Danova A, Chavasiri W, Muanprasat C. Discovery of a chalcone derivative as an anti-fibrotic agent targeting transforming growth factor-β1 signaling: Potential therapy of renal fibrosis. Biomed Pharmacother 2023; 165:115098. [PMID: 37437378 DOI: 10.1016/j.biopha.2023.115098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/25/2023] [Accepted: 06/27/2023] [Indexed: 07/14/2023] Open
Abstract
As a final common pathway of renal injuries, renal fibrosis leads to chronic kidney disease (CKD). Currently, there is no safe and effective therapy to prevent the progression of renal fibrosis to CKD. Inhibition of transforming growth factor-β1 (TGF-β1) pathway is proposed as one of the most promising approaches for anti-renal fibrosis therapies. This study aimed to identify novel anti-fibrotic agents using the TGF-β1-induced fibrosis in renal proximal tubule epithelial cells (RPTEC) and characterize their mechanism of action as well as in vivo efficacy. By screening 362 natural product-based compounds for their ability to reduce collagen accumulation assessed by picro-sirius red (PSR) staining in RPTEC cells, a chalcone derivative AD-021 was identified as an anti-fibrotic agent with IC50 of 14.93 μM. AD-021 suppressed TGF-β1-induced collagen production, expression of pro-fibrotic proteins (fibronectin and α-smooth muscle actin (αSMA)), and Smad-dependent and Smad-independent signaling pathways via suppression of TGF-β receptor II (TGFβRII) phosphorylation in RPTEC cells. Furthermore, TGF-β1-induced mitochondrial fission in RPTEC cells was ameliorated by AD-021 via mechanisms involving inhibition of Drp1 phosphorylation. In a mouse model of unilateral ureteral obstruction (UUO)-induced renal fibrosis, AD-021 reduced plasma TGF-β1, ameliorated renal fibrosis and improved renal function. Collectively, AD-021 represents a novel class of natural product-based anti-fibrotic agent that has therapeutic potential in the prevention of fibrosis-associated renal disorders including CKD.
Collapse
Affiliation(s)
- Wanangkan Poolsri
- Program in Translational Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Ratchathewi, Bangkok, Thailand; Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bang Phli, Samut Prakarn, Thailand
| | - Rattikarn Noitem
- Program in Translational Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Ratchathewi, Bangkok, Thailand; Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bang Phli, Samut Prakarn, Thailand
| | - Promsuk Jutabha
- Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bang Phli, Samut Prakarn, Thailand
| | | | - Ade Danova
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand; Organic Chemistry Division, Department of Chemistry, Faculty of Mathematics and Natural, 16 Sciences, Institut Teknologi Bandung, Ganesa No.10, West Java, Indonesia
| | - Warinthorn Chavasiri
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Chatchai Muanprasat
- Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bang Phli, Samut Prakarn, Thailand.
| |
Collapse
|
6
|
Keefover-Ring K, Carlson CH, Hyden B, Azeem M, Smart LB. Genetic mapping of sexually dimorphic volatile and non-volatile floral secondary chemistry of a dioecious willow. J Exp Bot 2022; 73:6352-6366. [PMID: 35710312 DOI: 10.1093/jxb/erac260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 06/14/2022] [Indexed: 06/15/2023]
Abstract
Secondary chemistry often differs between sexes in dioecious plant species, a pattern attributed to its possible role in the evolution and/or maintenance of dioecy. We used GC-MS to measure floral volatiles emitted from, and LC-MS to quantitate non-volatile secondary compounds contained in, female and male Salix purpurea willow catkins from an F2 family. Using the abundance of these chemicals, we then performed quantitative trait locus (QTL) mapping to locate them on the genome, identified biosynthetic candidate genes in the QTL intervals, and examined expression patterns of candidate genes using RNA-seq. Male flowers emitted more total terpenoids than females, but females produced more benzenoids. Male tissue contained greater amounts of phenolic glycosides, but females had more chalcones and flavonoids. A flavonoid pigment and a spermidine derivative were found only in males. Male catkins were almost twice the mass of females. Forty-two QTL were mapped for 25 chemical traits and catkin mass across 16 of the 19 S. purpurea chromosomes. Several candidate genes were identified, including a chalcone isomerase associated with seven compounds. A better understanding of the genetic basis of the sexually dimorphic chemistry of a dioecious species may shed light on how chemically mediated ecological interactions may have helped in the evolution and maintenance of dioecy.
Collapse
Affiliation(s)
- Ken Keefover-Ring
- Department of Botany, University of Wisconsin-Madison, Madison, WI, USA
- Department of Geography, University of Wisconsin-Madison, Madison, WI, USA
| | - Craig H Carlson
- Horticulture Section, School of Integrative Plant Science, Cornell University, Cornell AgriTech, Geneva, NY, USA
| | - Brennan Hyden
- Horticulture Section, School of Integrative Plant Science, Cornell University, Cornell AgriTech, Geneva, NY, USA
| | - Muhammad Azeem
- Department of Botany, University of Wisconsin-Madison, Madison, WI, USA
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, Pakistan
| | - Lawrence B Smart
- Horticulture Section, School of Integrative Plant Science, Cornell University, Cornell AgriTech, Geneva, NY, USA
| |
Collapse
|
7
|
Ohno S, Yamada H, Maruyama K, Deguchi A, Kato Y, Yokota M, Tatsuzawa F, Hosokawa M, Doi M. A novel aldo-keto reductase gene is involved in 6'-deoxychalcone biosynthesis in dahlia (Dahlia variabilis). Planta 2022; 256:47. [PMID: 35871668 DOI: 10.1007/s00425-022-03958-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 07/06/2022] [Indexed: 06/15/2023]
Abstract
A novel gene belonging to the aldo-keto reductase 13 family is involved in isoliquiritigenin biosynthesis in dahlia. The yellow pigments of dahlia flowers are derived from 6'-deoxychalcones, which are synthesized via a two-step process, involving the conversion of 3-malonyl-CoA and 4-coumaloyl-CoA into isoliquiritigenin in the first step, and the subsequent generation of butein from isoliquiritigenin. The first step reaction is catalyzed by chalcone synthase (CHS) and aldo-keto reductase (AKR). AKR has been implicated in the isoflavone biosynthesis in legumes, however, isolation of butein biosynthesis related AKR members are yet to be reported. A comparative RNA-seq analysis between two dahlia cultivars, 'Shukuhai' and its butein-deficient lateral mutant 'Rinka', was used in this study to identify a novel AKR gene involved in 6'-deoxychalcone biosynthesis. DvAKR1 encoded a AKR 13 sub-family protein with significant differential expression levels, and was phylogenetically distinct from the chalcone reductases, which belongs to the AKR 4A sub-family in legumes. DNA sequence variation and expression profiles of DvAKR1 gene were correlated with 6'-deoxychalcone accumulation in the tested dahlia cultivars. A single over-expression analysis of DvAKR1 was not sufficient to initiate the accumulation of isoliquiritigenin in tobacco, in contrast, its co-overexpression with a chalcone 4'-O-glucosyltransferase (Am4'CGT) from Antirrhinum majus and a MYB transcription factor, CaMYBA from Capsicum annuum successfully induced isoliquiritigenin accumulation. In addition, DvAKR1 homologous gene expression was detected in Coreopsideae species accumulating 6'-deoxychalcone, but not in Asteraceae species lacking 6'-deoxychalcone production. These results not only demonstrate the involvement of DvAKR1 in the biosynthesis of 6'-deoxychalcone in dahlia, but also show that 6'-deoxychalcone occurrence in Coreopsideae species developed evolutionarily independent from legume species.
Collapse
Affiliation(s)
- Sho Ohno
- Graduate School of Agriculture, Kyoto University, Kyoto, Kyoto, 606-8502, Japan.
| | - Haruka Yamada
- Graduate School of Agriculture, Kyoto University, Kyoto, Kyoto, 606-8502, Japan
| | - Kei Maruyama
- Graduate School of Agriculture, Kyoto University, Kyoto, Kyoto, 606-8502, Japan
| | - Ayumi Deguchi
- Graduate School of Agriculture, Kyoto University, Kyoto, Kyoto, 606-8502, Japan
- Chiba University, Chiba, 271-8510, Japan
| | - Yasunari Kato
- Graduate School of Agriculture, Kyoto University, Kyoto, Kyoto, 606-8502, Japan
| | - Mizuki Yokota
- Graduate School of Agriculture, Kyoto University, Kyoto, Kyoto, 606-8502, Japan
| | - Fumi Tatsuzawa
- Faculty of Agriculture, Iwate University, Iwate, Morioka, 020-8550, Japan
| | - Munetaka Hosokawa
- Graduate School of Agriculture, Kyoto University, Kyoto, Kyoto, 606-8502, Japan
- Kindai University, Nara, 631-0052, Japan
| | - Motoaki Doi
- Graduate School of Agriculture, Kyoto University, Kyoto, Kyoto, 606-8502, Japan
| |
Collapse
|
8
|
Kamecki F, Knez D, Carvalho D, Marcucci C, Rademacher M, Higgs J, Žakelj S, Marcos A, de Tezanos Pinto F, Abin-Carriquiry JA, Gobec S, Colettis N, Marder M. Multitarget 2'-hydroxychalcones as potential drugs for the treatment of neurodegenerative disorders and their comorbidities. Neuropharmacology 2021; 201:108837. [PMID: 34653442 DOI: 10.1016/j.neuropharm.2021.108837] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 09/30/2021] [Accepted: 10/10/2021] [Indexed: 02/01/2023]
Abstract
The complex nature of neurodegenerative diseases (NDDs), such as Alzheimer's disease (AD) and Parkinson's disease (PD) calls for multidirectional treatment. Restoring neurotransmitter levels by combined inhibition of cholinesterases (ChEs) and monoamine oxidases (MAOs, MAO-A and MAO-B), in conjunction with strategies to counteract amyloid β (Aβ) aggregation, may constitute a therapeutically strong multi-target approach for the treatment of NDDs. Chalcones are a subgroup of flavonoids with a broad spectrum of biological activity. We report here the synthesis of 2'-hydroxychalcones as MAO-A and MAO-B inhibitors. Compounds 5c (IC50 = 0.031 ± 0.001 μM), 5a (IC50 = 0.084 ± 0.003 μM), 2c (IC50 = 0.095 ± 0.019 μM) and 2a (IC50 = 0.111 ± 0.006 μM) were the most potent, selective and reversible inhibitors of human (h)MAO-B isoform. hMAO-B inhibitors 1a, 2a and 5a also inhibited murine MAO-B in vivo in mouse brain homogenates. Molecular modelling rationalised the binding mode of 2'-hydroxychalcones in the active site of hMAO-B. Additionally, several derivatives inhibited murine acetylcholinesterase (mAChE) (IC50 values from 4.37 ± 0.83 μM to 15.17 ± 6.03 μM) and reduced the aggregation propensity of Aβ. Moreover, some derivatives bound to the benzodiazepine binding site (BDZ-bs) of the γ-aminobutyric acid A (GABAA) receptors (1a and 2a with Ki = 4.9 ± 1.1 μM and 5.0 ± 1.1 μM, respectively), and exerted sedative and/or anxiolytic like effects on mice. The biological results reported here on 2'-hydroxychalcones provide an extension to previous studies on chalcone scaffold and show them as a potential treatment strategy for NDDs and their associated comorbidities.
Collapse
Affiliation(s)
- Fabiola Kamecki
- Universidad de Buenos Aires. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini, Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina.
| | - Damijan Knez
- University of Ljubljana, Faculty of Pharmacy, Ljubljana, Slovenia.
| | - Diego Carvalho
- Department of Neurochemistry, Instituto de Investigaciones Biológicas Clemente Estable, 11600, Montevideo, Uruguay.
| | - Carolina Marcucci
- Universidad de Buenos Aires. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini, Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina.
| | - Marina Rademacher
- Universidad de Buenos Aires. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini, Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina.
| | - Josefina Higgs
- Universidad de Buenos Aires. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini, Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina.
| | - Simon Žakelj
- University of Ljubljana, Faculty of Pharmacy, Ljubljana, Slovenia.
| | - Alejandra Marcos
- Universidad de Buenos Aires. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini, Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina.
| | - Felicitas de Tezanos Pinto
- Universidad de Buenos Aires. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini, Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina.
| | - Juan Andrés Abin-Carriquiry
- Department of Neurochemistry, Instituto de Investigaciones Biológicas Clemente Estable, 11600, Montevideo, Uruguay.
| | - Stanislav Gobec
- University of Ljubljana, Faculty of Pharmacy, Ljubljana, Slovenia.
| | - Natalia Colettis
- Universidad de Buenos Aires. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini, Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina.
| | - Mariel Marder
- Universidad de Buenos Aires. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini, Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina.
| |
Collapse
|
9
|
Rodríguez I, Saavedra E, del Rosario H, Perdomo J, Quintana J, Prencipe F, Oliva P, Romagnoli R, Estévez F. Apoptosis Pathways Triggered by a Potent Antiproliferative Hybrid Chalcone on Human Melanoma Cells. Int J Mol Sci 2021; 22:ijms222413462. [PMID: 34948260 PMCID: PMC8706831 DOI: 10.3390/ijms222413462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/03/2021] [Accepted: 12/13/2021] [Indexed: 12/13/2022] Open
Abstract
The World Health Organization reported that approximately 324,000 new cases of melanoma skin cancer were diagnosed worldwide in 2020. The incidence of melanoma has been increasing over the past decades. Targeting apoptotic pathways is a potential therapeutic strategy in the transition to preclinical models and clinical trials. Some naturally occurring products and synthetic derivatives are apoptosis inducers and may represent a realistic option in the fight against the disease. Thus, chalcones have received considerable attention due to their potential cytotoxicity against cancer cells. We have previously reported a chalcone containing an indole and a pyridine heterocyclic rings and an α-bromoacryloylamido radical which displays potent antiproliferative activity against several tumor cell lines. In this study, we report that this chalcone is a potent apoptotic inducer for human melanoma cell lines SK-MEL-1 and MEL-HO. Cell death was associated with mitochondrial cytochrome c release and poly(ADP-ribose) polymerase cleavage and was prevented by a non-specific caspase inhibitor. Using SK-MEL-1 as a model, we found that the mechanism of cell death involves (i) the generation of reactive oxygen species, (ii) activation of the extrinsic and intrinsic apoptotic and mitogen-activated protein kinase pathways, (iii) upregulation of TRAIL, DR4 and DR5, (iv) downregulation of p21Cip1/WAF1 and, inhibition of the NF-κB pathway.
Collapse
Affiliation(s)
- Irene Rodríguez
- Departamento de Bioquímica y Biología Molecular, Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Universidad de Las Palmas de Gran Canaria, 35016 Las Palmas de Gran Canaria, Spain; (I.R.); (E.S.); (H.d.R.); (J.P.); (J.Q.)
| | - Ester Saavedra
- Departamento de Bioquímica y Biología Molecular, Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Universidad de Las Palmas de Gran Canaria, 35016 Las Palmas de Gran Canaria, Spain; (I.R.); (E.S.); (H.d.R.); (J.P.); (J.Q.)
- Instituto Canario de Investigación del Cáncer (ICIC), 35016 Las Palmas de Gran Canaria, Spain
| | - Henoc del Rosario
- Departamento de Bioquímica y Biología Molecular, Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Universidad de Las Palmas de Gran Canaria, 35016 Las Palmas de Gran Canaria, Spain; (I.R.); (E.S.); (H.d.R.); (J.P.); (J.Q.)
| | - Juan Perdomo
- Departamento de Bioquímica y Biología Molecular, Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Universidad de Las Palmas de Gran Canaria, 35016 Las Palmas de Gran Canaria, Spain; (I.R.); (E.S.); (H.d.R.); (J.P.); (J.Q.)
| | - José Quintana
- Departamento de Bioquímica y Biología Molecular, Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Universidad de Las Palmas de Gran Canaria, 35016 Las Palmas de Gran Canaria, Spain; (I.R.); (E.S.); (H.d.R.); (J.P.); (J.Q.)
| | - Filippo Prencipe
- Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, Via L. Borsari 46, 44121 Ferrara, Italy; (F.P.); (P.O.); (R.R.)
| | - Paola Oliva
- Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, Via L. Borsari 46, 44121 Ferrara, Italy; (F.P.); (P.O.); (R.R.)
| | - Romeo Romagnoli
- Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, Via L. Borsari 46, 44121 Ferrara, Italy; (F.P.); (P.O.); (R.R.)
| | - Francisco Estévez
- Departamento de Bioquímica y Biología Molecular, Instituto Universitario de Investigaciones Biomédicas y Sanitarias, Universidad de Las Palmas de Gran Canaria, 35016 Las Palmas de Gran Canaria, Spain; (I.R.); (E.S.); (H.d.R.); (J.P.); (J.Q.)
- Correspondence: ; Tel.: +34-928-451-443; Fax: +34-928-451-441
| |
Collapse
|
10
|
Abstract
Cancer is a condition caused by many mechanisms (genetic, immune, oxidation, and inflammatory). Anticancer therapy aims to destroy or stop the growth of cancer cells. Resistance to treatment is theleading cause of the inefficiency of current standard therapies. Targeted therapies are the most effective due to the low number of side effects and low resistance. Among the small molecule natural compounds, flavonoids are of particular interest for theidentification of new anticancer agents. Chalcones are precursors to all flavonoids and have many biological activities. The anticancer activity of chalcones is due to the ability of these compounds to act on many targets. Natural chalcones, such as licochalcones, xanthohumol (XN), panduretin (PA), and loncocarpine, have been extensively studied and modulated. Modification of the basic structure of chalcones in order to obtain compounds with superior cytotoxic properties has been performed by modulating the aromatic residues, replacing aromatic residues with heterocycles, and obtaining hybrid molecules. A huge number of chalcone derivatives with residues such as diaryl ether, sulfonamide, and amine have been obtained, their presence being favorable for anticancer activity. Modification of the amino group in the structure of aminochalconesis always favorable for antitumor activity. This is why hybrid molecules of chalcones with different nitrogen hetercycles in the molecule have been obtained. From these, azoles (imidazole, oxazoles, tetrazoles, thiazoles, 1,2,3-triazoles, and 1,2,4-triazoles) are of particular importance for the identification of new anticancer agents.
Collapse
Affiliation(s)
- Teodora Constantinescu
- Department of Chemistry, Faculty of Pharmacy, Iuliu Hatieganu University, 400012 Cluj-Napoca, Romania
| | - Claudiu N. Lungu
- Department of Surgery, Country Emergency Hospital Braila, 810249 Braila, Romania
| |
Collapse
|
11
|
Luo H, Li N, Liu L, Wang H, He F. Synthesis of New AIEE-Active Chalcones for Imaging of Mitochondria in Living Cells and Zebrafish In Vivo. Int J Mol Sci 2021; 22:8949. [PMID: 34445653 PMCID: PMC8396511 DOI: 10.3390/ijms22168949] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/02/2021] [Accepted: 08/16/2021] [Indexed: 11/17/2022] Open
Abstract
Fluorophores with aggregation-induced emission enhancement (AIEE) properties have attracted increasing interest in recent years. On the basis of our previous research, we successfully designed and synthesized eleven chalcones. Through an optical performance experiment, we confirmed that compounds 1-6 had obvious AIEE properties. As these AIEE molecules had excellent fluorescence properties and a large Stokes shift, we studied their application in living cell imaging, and the results showed that these compounds had low cytotoxicity and good biocompatibility at the experimental concentrations. More importantly, they could specifically label mitochondria. Subsequently, we selected zebrafish as experimental animals to explore the possibilities of these compounds in animal imaging. The fluorescence imaging of zebrafish showed that these AIEE molecules can enter the embryo and can be targeted to aggregate in the digestive tract, which provides a strong foundation for their practical application in the field of biological imaging. Compared with traditional fluorophores, these AIEE molecules have the advantages of possessing a small molecular weight and high flexibility. Therefore, they have excellent application prospects in the field of biological imaging. In addition, the findings of this study have very positive practical significance for the discovery of more AIEE molecules.
Collapse
Affiliation(s)
- Huiqing Luo
- School of Pharmaceutical Science, Sun Yat-sen University, Guangzhou 510006, China; (H.L.); (N.L.); (L.L.)
| | - Na Li
- School of Pharmaceutical Science, Sun Yat-sen University, Guangzhou 510006, China; (H.L.); (N.L.); (L.L.)
| | - Liyan Liu
- School of Pharmaceutical Science, Sun Yat-sen University, Guangzhou 510006, China; (H.L.); (N.L.); (L.L.)
| | - Huaqiao Wang
- Department of Anatomy and Neurobiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510006, China;
| | - Feng He
- School of Pharmaceutical Science, Sun Yat-sen University, Guangzhou 510006, China; (H.L.); (N.L.); (L.L.)
| |
Collapse
|
12
|
Kaswan NK, Mohammed Izham NAB, Tengku Mohamad TAS, Sulaiman MR, Perimal EK. Cardamonin Modulates Neuropathic Pain through the Possible Involvement of Serotonergic 5-HT1A Receptor Pathway in CCI-Induced Neuropathic Pain Mice Model. Molecules 2021; 26:3677. [PMID: 34208700 PMCID: PMC8234694 DOI: 10.3390/molecules26123677] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 06/04/2021] [Accepted: 06/07/2021] [Indexed: 12/14/2022] Open
Abstract
Cardamonin, a naturally occurring chalcone isolated from Alpinia species has shown to possess strong anti-inflammatory and anti-nociceptive activities. Previous studies have demonstrated that cardamonin exerts antihyperalgesic and antiallodynic properties in chronic constriction injury (CCI)-induced neuropathic pain animal model. However, the mechanisms underlying cardamonin's effect have yet to be fully understood. The present study aims to investigate the involvement of the serotonergic system in cardamonin induced antihyperalgesic and antiallodynic effects in CCI-induced neuropathic pain mice model. The neuropathic pain symptoms in the CCI mice model were assessed using Hargreaves Plantar test and von-Frey filament test on day 14 post-surgery. Central depletion of serotonin along the descending serotonergic pathway was done using ρ-chlorophenylalanine (PCPA, 100 mg/kg, i.p.), an inhibitor of serotonin synthesis for four consecutive days before cardamonin treatment, and was found to reverse the antihyperalgesic and antiallodynic effect produced by cardamonin. Pretreatment of the mice with several 5-HT receptor subtypes antagonists: methiothepin (5-HT1/6/77 receptor antagonist, 0.1 mg/kg), WAY 100635 (5-HT1A receptor antagonist, 1 mg/kg), isamoltane (5-HT1B receptor antagonist, 2.5 mg/kg), ketanserin (5-HT2A receptor antagonist, 0.3 mg/kg), and ondansetron (5-HT3 receptor antagonist, 0.5 mg/kg) were shown to abolish the effect of cardamonin induced antihyperalgesic and antiallodynic effects. Further evaluation of the 5-HT1A receptor subtype protein expressions reveals that cardamonin significantly upregulated its expression in the brainstem and spinal cord. Our results suggest that the serotonergic pathway is essential for cardamonin to exert its antineuropathic effect in CCI mice through the involvement of the 5-HT1A receptor subtype in the central nervous system.
Collapse
Affiliation(s)
- Nur Khalisah Kaswan
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia; (N.K.K.); (N.A.B.M.I.); (T.A.S.T.M.); (M.R.S.)
| | - Noor Aishah Binti Mohammed Izham
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia; (N.K.K.); (N.A.B.M.I.); (T.A.S.T.M.); (M.R.S.)
| | - Tengku Azam Shah Tengku Mohamad
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia; (N.K.K.); (N.A.B.M.I.); (T.A.S.T.M.); (M.R.S.)
| | - Mohd Roslan Sulaiman
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia; (N.K.K.); (N.A.B.M.I.); (T.A.S.T.M.); (M.R.S.)
| | - Enoch Kumar Perimal
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia; (N.K.K.); (N.A.B.M.I.); (T.A.S.T.M.); (M.R.S.)
- Centre of Excellence for Nanoscale BioPhotonics, Australian Research Council, University of Adelaide, Adelaide, SA 5005, Australia
| |
Collapse
|
13
|
Kostopoulou I, Tzani A, Polyzos NI, Karadendrou MA, Kritsi E, Pontiki E, Liargkova T, Hadjipavlou-Litina D, Zoumpoulakis P, Detsi A. Exploring the 2'-Hydroxy-Chalcone Framework for the Development of Dual Antioxidant and Soybean Lipoxygenase Inhibitory Agents. Molecules 2021; 26:2777. [PMID: 34066803 PMCID: PMC8125951 DOI: 10.3390/molecules26092777] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 04/23/2021] [Accepted: 04/30/2021] [Indexed: 12/28/2022] Open
Abstract
2'-hydroxy-chalcones are naturally occurring compounds with a wide array of bioactivity. In an effort to delineate the structural features that favor antioxidant and lipoxygenase (LOX) inhibitory activity, the design, synthesis, and bioactivity profile of a series of 2'-hydroxy-chalcones bearing diverse substituents on rings A and B, are presented. Among all the synthesized derivatives, chalcone 4b, bearing two hydroxyl substituents on ring B, was found to possess the best combined activity (82.4% DPPH radical scavenging ability, 82.3% inhibition of lipid peroxidation, and satisfactory LOX inhibition value (IC50 = 70 μM). Chalcone 3c, possessing a methoxymethylene substituent on ring A, and three methoxy groups on ring B, exhibited the most promising LOX inhibitory activity (IC50 = 45 μM). A combination of in silico techniques were utilized in an effort to explore the crucial binding characteristics of the most active compound 3c and its analogue 3b, to LOX. A common H-bond interaction pattern, orienting the hydroxyl and carbonyl groups of the aromatic ring A towards Asp768 and Asn128, respectively, was observed. Regarding the analogue 3c, the bulky (-OMOM) group does not seem to participate in a direct binding, but it induces an orientation capable to form H-bonds between the methoxy groups of the aromatic ring B with Trp130 and Gly247.
Collapse
Affiliation(s)
- Ioanna Kostopoulou
- Laboratory of Organic Chemistry, Department of Chemical Sciences, School of Chemical Engineering, National Technical University of Athens, Heroon Polytechniou 9, Zografou Campus, 15780 Athens, Greece; (I.K.); (A.T.); (N.-I.P.); (M.-A.K.)
| | - Andromachi Tzani
- Laboratory of Organic Chemistry, Department of Chemical Sciences, School of Chemical Engineering, National Technical University of Athens, Heroon Polytechniou 9, Zografou Campus, 15780 Athens, Greece; (I.K.); (A.T.); (N.-I.P.); (M.-A.K.)
| | - Nestor-Ioannis Polyzos
- Laboratory of Organic Chemistry, Department of Chemical Sciences, School of Chemical Engineering, National Technical University of Athens, Heroon Polytechniou 9, Zografou Campus, 15780 Athens, Greece; (I.K.); (A.T.); (N.-I.P.); (M.-A.K.)
| | - Maria-Anna Karadendrou
- Laboratory of Organic Chemistry, Department of Chemical Sciences, School of Chemical Engineering, National Technical University of Athens, Heroon Polytechniou 9, Zografou Campus, 15780 Athens, Greece; (I.K.); (A.T.); (N.-I.P.); (M.-A.K.)
| | - Eftichia Kritsi
- Institute of Chemical Biology, National Hellenic Research Foundation, 48, Vas. Constantinou Avenue, 11635 Athens, Greece; (E.K.); (P.Z.)
- Department of Food Science and Technology, University of West Attica, Ag. Spyridonos, 12243 Egaleo, Greece
| | - Eleni Pontiki
- Laboratory of Pharmaceutical Chemistry, School of Pharmacy, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (E.P.); (T.L.); (D.H.-L.)
| | - Thalia Liargkova
- Laboratory of Pharmaceutical Chemistry, School of Pharmacy, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (E.P.); (T.L.); (D.H.-L.)
| | - Dimitra Hadjipavlou-Litina
- Laboratory of Pharmaceutical Chemistry, School of Pharmacy, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (E.P.); (T.L.); (D.H.-L.)
| | - Panagiotis Zoumpoulakis
- Institute of Chemical Biology, National Hellenic Research Foundation, 48, Vas. Constantinou Avenue, 11635 Athens, Greece; (E.K.); (P.Z.)
- Department of Food Science and Technology, University of West Attica, Ag. Spyridonos, 12243 Egaleo, Greece
| | - Anastasia Detsi
- Laboratory of Organic Chemistry, Department of Chemical Sciences, School of Chemical Engineering, National Technical University of Athens, Heroon Polytechniou 9, Zografou Campus, 15780 Athens, Greece; (I.K.); (A.T.); (N.-I.P.); (M.-A.K.)
| |
Collapse
|
14
|
Xiao Y, Han F, Kim MJ, Lee KY, Lee IS. Microbial Transformation of Broussochalcones A and B by Aspergillus niger. J Nat Prod 2021; 84:601-607. [PMID: 33527835 DOI: 10.1021/acs.jnatprod.0c01102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Broussochalcones A (BCA, 1) and B (BCB, 2) are major bioactive constituents isolated from Broussonetia papyrifera, a polyphenol-rich plant belonging to the family Moraceae. Due to their low yields from natural sources, BCA (1) and BCB (2) were prepared synthetically by employing Claisen-Schmidt condensation, and these were used as substrates for microbial transformation to obtain novel derivatives. Microbial transformation of BCA (1) and BCB (2) with the endophytic fungus Aspergillus niger KCCM 60332 yielded 10 previously undescribed chalcones (1a-1e and 2a-2e). Their structures were established based on the spectroscopic methods. The cytotoxicity of BCA (1), BCB (2), and their metabolites (1a-1e and 2a-2e) was determined by human cancer cell lines A375P, A549, HT-29, MCF-7, and HepG2, with 1e shown to be most cytotoxic.
Collapse
Affiliation(s)
- Yina Xiao
- College of Pharmacy, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Fubo Han
- College of Pharmacy, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Myeong Ji Kim
- College of Pharmacy, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Kwang Youl Lee
- College of Pharmacy, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Ik-Soo Lee
- College of Pharmacy, Chonnam National University, Gwangju 61186, Republic of Korea
| |
Collapse
|
15
|
Emam SH, Sonousi A, Osman EO, Hwang D, Kim GD, Hassan RA. Design and synthesis of methoxyphenyl- and coumarin-based chalcone derivatives as anti-inflammatory agents by inhibition of NO production and down-regulation of NF-κB in LPS-induced RAW264.7 macrophage cells. Bioorg Chem 2021; 107:104630. [PMID: 33476864 DOI: 10.1016/j.bioorg.2021.104630] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 01/01/2021] [Accepted: 01/02/2021] [Indexed: 12/20/2022]
Abstract
Exaggerated inflammatory responses may cause serious and debilitating diseases such as acute lung injury and rheumatoid arthritis. Two series of chalcone derivatives were prepared as anti-inflammatory agents. Methoxylated phenyl-based chalcones 2a-l and coumarin-based chalcones 3a-f were synthesized and compared for their inhibition of COX-2 enzyme and nitric oxide production suppression. Methoxylated phenyl-based chalcones showed better inhibition to COX-2 enzyme and nitric oxide suppression than the coumarin-based chalcones. Among the 18 synthesized chalcone derivatives, compound 2f exhibited the highest anti-inflammatory activity by inhibition of nitric oxide concentration in LPS-induced RAW264.7 macrophages (IC50 = 11.2 μM). The tested compound 2f showed suppression of iNOS and COX-2 enzymes. Moreover, compound 2f decreases in the expression of NF-κB and phosphorylated IκB in LPS-stimulated macrophages. Finally, docking studies suggested the inhibition of IKKβ as a mechanism of action and highlighted the importance of 2f hydrophobic interactions.
Collapse
Affiliation(s)
- Soha H Emam
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt
| | - Amr Sonousi
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt; University of Hertfordshire Hosted by Global Academic Foundation, New Administrative Capital, Cairo, Egypt.
| | - Eman O Osman
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt
| | - Dukhyun Hwang
- Department of Microbiology, College of Natural Sciences, Pukyong National University, Busan 48513, Republic of Korea
| | - Gun-Do Kim
- Department of Microbiology, College of Natural Sciences, Pukyong National University, Busan 48513, Republic of Korea
| | - Rasha A Hassan
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Cairo University, Cairo 11562, Egypt
| |
Collapse
|
16
|
Raj Dwivedi G, Khwaja S, Singh Negi A, Panda SS, Swaroop Sanket A, Pati S, Chand Gupta A, Bawankule DU, Chanda D, Kant R, Darokar MP. Design, synthesis and drug resistance reversal potential of novel curcumin mimics Van D: Synergy potential of curcumin mimics. Bioorg Chem 2021; 106:104454. [PMID: 33213895 DOI: 10.1016/j.bioorg.2020.104454] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 10/03/2020] [Accepted: 11/01/2020] [Indexed: 12/29/2022]
Abstract
Being crucial part of plant-based novel discovery of drug from natural resources, a study was done to explore the antibacterial potential of curcumin mimics in combination with antibiotics against multidrug resistant isolates of Pseudomonas aeruginosa. The best candidate Van D, a curcumin mimics reduced the MIC of tetracycline (TET) up to 16 folds against multidrug resistant clinical isolates. VanD further inhibited the efflux pumps as evident by ethidium bromide efflux and by in-silico docking studies. In another experiment, it was also found that Van D inhibits biofilm synthesis. This derivative kills the KG-P2, an isolate of P. aeruginosa in a time dependent manner, the post-antibiotic effect (PAE) of tetracycline was extended as well as mutant prevention concentration (MPC) of TET was also decreased. In Swiss albino mice, Van D reduced the proinflammatory cytokines concentration. In acute oral toxicity study, this derivative was well tolerated and found to be safe up to 1000 mg/kg dose. To the best of our knowledge, this is the first report on curcumin mimics as synergistic agent via inhibition of efflux pump.
Collapse
Affiliation(s)
- Gaurav Raj Dwivedi
- Microbiology Department, ICMR-Regional Medical Research Centre, Gorakhpur 273013, Uttar Pradesh, India.
| | - Sadiya Khwaja
- Phytochemistry Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Arvind Singh Negi
- Phytochemistry Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Swati S Panda
- ICMR-Regional Medical Research Centre, Bhubaneshwar 751023, Odisha, India
| | - A Swaroop Sanket
- ICMR-Regional Medical Research Centre, Bhubaneshwar 751023, Odisha, India
| | - Sanghamitra Pati
- ICMR-Regional Medical Research Centre, Bhubaneshwar 751023, Odisha, India
| | - Amit Chand Gupta
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India
| | - Dnyaneshwar Umrao Bawankule
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Debabrata Chanda
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Rajni Kant
- Microbiology Department, ICMR-Regional Medical Research Centre, Gorakhpur 273013, Uttar Pradesh, India
| | - Mahendra P Darokar
- Bioprospection and Product Development Division, CSIR-Central Institute of Medicinal and Aromatic Plants, Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| |
Collapse
|
17
|
Mikl M, Dennig A, Nidetzky B. Efficient enzyme formulation promotes Leloir glycosyltransferases for glycoside synthesis. J Biotechnol 2020; 322:74-78. [PMID: 32687957 DOI: 10.1016/j.jbiotec.2020.06.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 05/26/2020] [Accepted: 06/14/2020] [Indexed: 01/17/2023]
Abstract
Sugar nucleotide-dependent (Leloir) glycosyltransferases are powerful catalysts for glycoside synthesis. Their applicability can be limited due to elaborate production of enzyme preparations deployable in biocatalytic processes. Here, we show that efficient enzyme formulation promotes glycosyltransferases for the synthesis of the natural C-glycoside nothofagin. Adding Brij-35 detergent (1 %, w/v) during sonication of the E. coli BL21-Gold (DE3) expression strain, recovery of Oryza sativa C-glycosyltransferase was enhanced by ∼3-fold, partly due to the release of enzyme activity trapped in insoluble pellet. Freeze drying of the resulting cell-free extract (∼17 U ml-1) reduced the volume ∼20-fold and gave ∼55 mg solids ml-1 liquid processed, with 83 % retention of the original activity and a specific activity of 0.20 U mg-1 solids. The Glycine max sucrose synthase was processed analogously, giving a solid enzyme preparation of 0.28 U mg-1 in 63 % yield. Both enzyme formulations were stable for several weeks. The glycosyltransferase cascade reaction for 3'-β-C-glucosylation of phloretin (60 mM; as inclusion complex with hydroxypropyl-β-cyclodextrin) from UDP-glucose (generated in situ by sucrose synthase from 500 mM sucrose and 0.5 mM UDP) showed excellent performance metrics (≥ 98 % yield; 3.2 g l-1 h-1 space-time yield; ∼90 regeneration cycles for UDP). Collectively, our study demonstrates a facile procedure for solid glycosyltransferase formulations practically usable in glycoside synthesis.
Collapse
Affiliation(s)
- Markus Mikl
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, 8010, Graz, Austria
| | - Alexander Dennig
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, 8010, Graz, Austria; Austrian Centre of Industrial Biotechnology (acib), 8010, Graz, Austria
| | - Bernd Nidetzky
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, 8010, Graz, Austria; Austrian Centre of Industrial Biotechnology (acib), 8010, Graz, Austria.
| |
Collapse
|
18
|
Wang Y, Yauk YK, Zhao Q, Hamiaux C, Xiao Z, Gunaseelan K, Zhang L, Tomes S, López-Girona E, Cooney J, Li H, Chagné D, Ma F, Li P, Atkinson RG. Biosynthesis of the Dihydrochalcone Sweetener Trilobatin Requires Phloretin Glycosyltransferase2. Plant Physiol 2020; 184:738-752. [PMID: 32732350 PMCID: PMC7536660 DOI: 10.1104/pp.20.00807] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 07/16/2020] [Indexed: 06/11/2023]
Abstract
Epidemics of obesity and type 2 diabetes drive strong consumer interest in plant-based low-calorie sweeteners. Trilobatin is a sweetener found at high concentrations in the leaves of a range of crabapple (Malus) species, but not in domesticated apple (Malus × domestica) leaves, which contain trilobatin's bitter positional isomer phloridzin. Variation in trilobatin content was mapped to the Trilobatin locus on LG 7 in a segregating population developed from a cross between domesticated apples and crabapples. Phloretin glycosyltransferase2 (PGT2) was identified by activity-directed protein purification and differential gene expression analysis in samples high in trilobatin but low in phloridzin. Markers developed for PGT2 cosegregated strictly with the Trilobatin locus. Biochemical analysis showed PGT2 efficiently catalyzed 4'-o-glycosylation of phloretin to trilobatin as well as 3-hydroxyphloretin to sieboldin. Transient expression of double bond reductase, chalcone synthase, and PGT2 genes reconstituted the apple pathway for trilobatin production in Nicotiana benthamiana Transgenic M. × domestica plants overexpressing PGT2 produced high concentrations of trilobatin in young leaves. Transgenic plants were phenotypically normal, and no differences in disease susceptibility were observed compared to wild-type plants grown under simulated field conditions. Sensory analysis indicated that apple leaf teas from PGT2 transgenics were readily discriminated from control leaf teas and were perceived as significantly sweeter. Identification of PGT2 allows marker-aided selection to be developed to breed apples containing trilobatin, and for high amounts of this natural low-calorie sweetener to be produced via biopharming and metabolic engineering in yeast.
Collapse
Affiliation(s)
- Yule Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yar-Khing Yauk
- The New Zealand Institute for Plant and Food Research Ltd, Auckland 1142, New Zealand
| | - Qian Zhao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Cyril Hamiaux
- The New Zealand Institute for Plant and Food Research Ltd, Auckland 1142, New Zealand
| | - Zhengcao Xiao
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | | | - Lei Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Sumathi Tomes
- The New Zealand Institute for Plant and Food Research Ltd, Auckland 1142, New Zealand
| | - Elena López-Girona
- The New Zealand Institute for Plant and Food Research Ltd, Palmerston North 4442, New Zealand
| | - Janine Cooney
- The New Zealand Institute for Plant and Food Research Ltd, Hamilton 3240, New Zealand
| | - Houhua Li
- College of Landscape Architecture and Arts, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - David Chagné
- The New Zealand Institute for Plant and Food Research Ltd, Palmerston North 4442, New Zealand
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Pengmin Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ross G Atkinson
- The New Zealand Institute for Plant and Food Research Ltd, Auckland 1142, New Zealand
| |
Collapse
|
19
|
Vazquez-Rodriguez S, Vilar S, Kachler S, Klotz KN, Uriarte E, Borges F, Matos MJ. Adenosine Receptor Ligands: Coumarin-Chalcone Hybrids as Modulating Agents on the Activity of hARs. Molecules 2020; 25:molecules25184306. [PMID: 32961824 PMCID: PMC7571217 DOI: 10.3390/molecules25184306] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/15/2020] [Accepted: 09/18/2020] [Indexed: 11/16/2022] Open
Abstract
Adenosine receptors (ARs) play an important role in neurological and psychiatric disorders such as Alzheimer’s disease, Parkinson’s disease, epilepsy and schizophrenia. The different subtypes of ARs and the knowledge on their densities and status are important for understanding the mechanisms underlying the pathogenesis of diseases and for developing new therapeutics. Looking for new scaffolds for selective AR ligands, coumarin–chalcone hybrids were synthesized (compounds 1–8) and screened in radioligand binding (hA1, hA2A and hA3) and adenylyl cyclase (hA2B) assays in order to evaluate their affinity for the four human AR subtypes (hARs). Coumarin–chalcone hybrid has been established as a new scaffold suitable for the development of potent and selective ligands for hA1 or hA3 subtypes. In general, hydroxy-substituted hybrids showed some affinity for the hA1, while the methoxy counterparts were selective for the hA3. The most potent hA1 ligand was compound 7 (Ki = 17.7 µM), whereas compound 4 was the most potent ligand for hA3 (Ki = 2.49 µM). In addition, docking studies with hA1 and hA3 homology models were established to analyze the structure–function relationships. Results showed that the different residues located on the protein binding pocket could play an important role in ligand selectivity.
Collapse
Affiliation(s)
- Saleta Vazquez-Rodriguez
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain; (S.V.); (E.U.)
- Correspondence: (S.V.-R.); or (M.J.M.)
| | - Santiago Vilar
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain; (S.V.); (E.U.)
| | - Sonja Kachler
- Institut für Pharmakologie und Toxikologie, Universität Würzburg, 97078, Würzburg, Germany; (S.K.); (K.-N.K.)
| | - Karl-Norbert Klotz
- Institut für Pharmakologie und Toxikologie, Universität Würzburg, 97078, Würzburg, Germany; (S.K.); (K.-N.K.)
| | - Eugenio Uriarte
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain; (S.V.); (E.U.)
- Instituto de Ciencias Químicas Aplicadas, Universidad Autónoma de Chile, 7500912 Santiago, Chile
| | - Fernanda Borges
- CIQUP/Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua Campo Alegre 687, 4169-007 Porto, Portugal;
| | - Maria João Matos
- Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain; (S.V.); (E.U.)
- CIQUP/Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua Campo Alegre 687, 4169-007 Porto, Portugal;
- Correspondence: (S.V.-R.); or (M.J.M.)
| |
Collapse
|
20
|
Sakata RP, Antoniolli G, Lancellotti M, Kawano DF, Guimarães Barbosa E, Almeida WP. Synthesis and biological evaluation of 2'-Aminochalcone: A multi-target approach to find drug candidates to treat Alzheimer's disease. Bioorg Chem 2020; 103:104201. [PMID: 32890999 DOI: 10.1016/j.bioorg.2020.104201] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 07/17/2020] [Accepted: 08/01/2020] [Indexed: 02/07/2023]
Abstract
Alzheimer's disease (AD) is a neurodegenerative process that compromises cognitive functions. The physiopathology of AD is multifactorial and is mainly supported by the cholinergic and amyloid hypotheses, which allows the identification the fundamental role of some markers, such as the enzymes acetylcholinesterase (AChE) and β-secretase (BACE-1), and the β-amyloid peptide (Aβ). In this work, we prepared a series of chalcones and 2'-aminochalcones, which were tested against AChE and BACE-1 enzymes and on the aggregation of Aβ. All compounds inhibited AChE activity with different potencies. We have found that the majority of chalcones having the amino group are able to inhibit BACE-1, which was not observed for chalcones without this group. The most active compound is the one derived from 2,3-dichlorobenzaldeyde, having an IC50 value of 2.71 μM. A molecular docking study supported this result, showing a good interaction of the amino group with aspartic acid residues of the catalytic diade of BACE-1. Thioflavin-T fluorescence emission is reduced in 30 - 40%, when Aβ42 is incubated in the presence of some chalcones under aggregation conditions. In vitro cytotoxicity and in silico prediction of pharmacokinetic properties were also conducted in this study.
Collapse
Affiliation(s)
- Renata P Sakata
- Institute of Chemistry, University of Campinas, Brazil; Porphirio da Paz High School, Campinas, SP, Brazil
| | | | - Marcelo Lancellotti
- Faculty of Pharmaceutical Sciences, University of Campinas, 200, Candido Portinari, Campinas, SP ZC 13083-871, Brazil
| | - Daniel Fabio Kawano
- Faculty of Pharmaceutical Sciences, University of Campinas, 200, Candido Portinari, Campinas, SP ZC 13083-871, Brazil
| | | | - Wanda P Almeida
- Institute of Chemistry, University of Campinas, Brazil; Faculty of Pharmaceutical Sciences, University of Campinas, 200, Candido Portinari, Campinas, SP ZC 13083-871, Brazil.
| |
Collapse
|
21
|
Oh HN, Lee MH, Kim E, Kwak AW, Yoon G, Cho SS, Liu K, Chae JI, Shim JH. Licochalcone D Induces ROS-Dependent Apoptosis in Gefitinib-Sensitive or Resistant Lung Cancer Cells by Targeting EGFR and MET. Biomolecules 2020; 10:biom10020297. [PMID: 32070026 PMCID: PMC7072161 DOI: 10.3390/biom10020297] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 02/10/2020] [Accepted: 02/10/2020] [Indexed: 01/26/2023] Open
Abstract
Licochalcone D (LCD), a flavonoid isolated from a Chinese medicinal plant Glycyrrhiza inflata, has a variety of pharmacological activities. However, the anti-cancer effects of LCD on non-small cell lung cancer (NSCLC) have not been investigated yet. The amplification of MET (hepatocyte growth factor receptor) compensates for the inhibition of epidermal growth factor receptor (EGFR) activity due to tyrosine kinase inhibitor (TKI), leading to TKI resistance. Therefore, EGFR and MET can be attractive targets for lung cancer. We investigated the anti-proliferative and apoptotic effects of LCD in lung cancer cells HCC827 (gefitinib-sensitive) and HCC827GR (gefitinib-resistant) through 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, pull-down/kinase assay, cell cycle analysis, Annexin-V/7-ADD staining, reactive oxygen species (ROS) assay, mitochondrial membrane potential (MMP) assay, multi-caspase assay, and Western blot analysis. The results showed that LCD inhibited phosphorylation and the kinase activity of EGFR and MET. In addition, the predicted pose of LCD was competitively located at the ATP binding site. LCD suppressed lung cancer cells growth by blocking cell cycle progression at the G2/M transition and inducing apoptosis. LCD also induced caspases activation and poly (ADP-ribose) polymerase (PARP) cleavage, thus displaying features of apoptotic signals. These results provide evidence that LCD has anti-tumor effects by inhibiting EGFR and MET activities and inducing ROS-dependent apoptosis in NSCLC, suggesting that LCD has the potential to treat lung cancer.
Collapse
Affiliation(s)
- Ha-Na Oh
- Department of Pharmacy, Mokpo National University, Jeonnam 58554, Korea; (H.-N.O.); (A.-W.K.); (G.Y.); (S.-S.C.)
| | - Mee-Hyun Lee
- The China-US (Henan) Hormel Cancer Institute, Zhengzhou 450008, Henan, China; (M.-H.L.); (K.L.)
- Basic Medical College, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Eunae Kim
- College of Pharmacy, Chosun University, Gwangju 61452, Korea;
| | - Ah-Won Kwak
- Department of Pharmacy, Mokpo National University, Jeonnam 58554, Korea; (H.-N.O.); (A.-W.K.); (G.Y.); (S.-S.C.)
| | - Goo Yoon
- Department of Pharmacy, Mokpo National University, Jeonnam 58554, Korea; (H.-N.O.); (A.-W.K.); (G.Y.); (S.-S.C.)
| | - Seung-Sik Cho
- Department of Pharmacy, Mokpo National University, Jeonnam 58554, Korea; (H.-N.O.); (A.-W.K.); (G.Y.); (S.-S.C.)
| | - Kangdong Liu
- The China-US (Henan) Hormel Cancer Institute, Zhengzhou 450008, Henan, China; (M.-H.L.); (K.L.)
- Basic Medical College, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Jung-Il Chae
- Department of Dental Pharmacology, School of Dentistry, BK21 Plus, Jeonbuk National University, Jeonju 54896, Korea
- Correspondence: (J.-I.C.); or (J.-H.S.); Tel.: +82-63-270-4024 (J.-I.C.); +82-61-450-2684 (J.-H.S.); Fax: +82-63-270-4037 (J.-I.C.); +82-61-450-2689 (J.-H.S.)
| | - Jung-Hyun Shim
- Department of Pharmacy, Mokpo National University, Jeonnam 58554, Korea; (H.-N.O.); (A.-W.K.); (G.Y.); (S.-S.C.)
- The China-US (Henan) Hormel Cancer Institute, Zhengzhou 450008, Henan, China; (M.-H.L.); (K.L.)
- Correspondence: (J.-I.C.); or (J.-H.S.); Tel.: +82-63-270-4024 (J.-I.C.); +82-61-450-2684 (J.-H.S.); Fax: +82-63-270-4037 (J.-I.C.); +82-61-450-2689 (J.-H.S.)
| |
Collapse
|
22
|
Alshangiti AM, Tuboly E, Hegarty SV, McCarthy CM, Sullivan AM, O'Keeffe GW. 4-Hydroxychalcone Induces Cell Death via Oxidative Stress in MYCN-Amplified Human Neuroblastoma Cells. Oxid Med Cell Longev 2019; 2019:1670759. [PMID: 31885773 PMCID: PMC6915131 DOI: 10.1155/2019/1670759] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 10/21/2019] [Accepted: 11/20/2019] [Indexed: 12/26/2022]
Abstract
Neuroblastoma is an embryonal malignancy that arises from cells of sympathoadrenal lineage during the development of the nervous system. It is the most common pediatric extracranial solid tumor and is responsible for 15% of childhood deaths from cancer. Fifty percent of cases are diagnosed as high-risk metastatic disease with a low overall 5-year survival rate. More than half of patients experience disease recurrence that can be refractory to treatment. Amplification of the MYCN gene is an important prognostic indicator that is associated with rapid disease progression and a poor prognosis, highlighting the need for new therapeutic approaches. In recent years, there has been an increasing focus on identifying anticancer properties of naturally occurring chalcones, which are secondary metabolites with variable phenolic structures. Here, we report that 4-hydroxychalcone is a potent cytotoxin for MYCN-amplified IMR-32 and SK-N-BE (2) neuroblastoma cells, when compared to non-MYCN-amplified SH-SY5Y neuroblastoma cells and to the non-neuroblastoma human embryonic kidney cell line, HEK293t. Moreover, 4-hydroxychalcone treatment significantly decreased cellular levels of the antioxidant glutathione and increased cellular reactive oxygen species. In addition, 4-hydroxychalcone treatment led to impairments in mitochondrial respiratory function, compared to controls. In support of this, the cytotoxic effect of 4-hydroxychalcone was prevented by co-treatment with either the antioxidant N-acetyl-L-cysteine, a pharmacological inhibitor of oxidative stress-induced cell death (IM-54) or the mitochondrial reactive oxygen species scavenger, Mito-TEMPO. When combined with the anticancer drugs cisplatin or doxorubicin, 4-hydroxychalcone led to greater reductions in cell viability than was induced by either anti-cancer agent alone. In summary, this study identifies a cytotoxic effect of 4-hydroxychalcone in MYCN-amplified human neuroblastoma cells, which rationalizes its further study in the development of new therapies for pediatric neuroblastoma.
Collapse
Affiliation(s)
- Amnah M. Alshangiti
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
- Cork Neuroscience Centre, University College Cork, Cork, Ireland
| | - Eszter Tuboly
- Department of Pharmacology and Therapeutics, University College Cork, Cork, Ireland
| | - Shane V. Hegarty
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
- Cork Neuroscience Centre, University College Cork, Cork, Ireland
| | - Cathal M. McCarthy
- Department of Pharmacology and Therapeutics, University College Cork, Cork, Ireland
| | - Aideen M. Sullivan
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
- Cork Neuroscience Centre, University College Cork, Cork, Ireland
| | - Gerard W. O'Keeffe
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
- Cork Neuroscience Centre, University College Cork, Cork, Ireland
| |
Collapse
|
23
|
Braune A, Gütschow M, Blaut M. An NADH-Dependent Reductase from Eubacterium ramulus Catalyzes the Stereospecific Heteroring Cleavage of Flavanones and Flavanonols. Appl Environ Microbiol 2019; 85:e01233-19. [PMID: 31375488 PMCID: PMC6752008 DOI: 10.1128/aem.01233-19] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Accepted: 07/29/2019] [Indexed: 11/20/2022] Open
Abstract
The human intestinal anaerobe Eubacterium ramulus is known for its ability to degrade various dietary flavonoids. In the present study, we demonstrate the cleavage of the heterocyclic C-ring of flavanones and flavanonols by an oxygen-sensitive NADH-dependent reductase, previously described as enoate reductase, from E. ramulus This flavanone- and flavanonol-cleaving reductase (Fcr) was purified following its heterologous expression in Escherichia coli and further characterized. Fcr cleaved the flavanones naringenin, eriodictyol, liquiritigenin, and homoeriodictyol. Moreover, the flavanonols taxifolin and dihydrokaempferol served as substrates. The catalyzed reactions were stereospecific for the (2R)-enantiomers of the flavanone substrates and for the (2S,3S)-configured flavanonols. The enantioenrichment of the nonconverted stereoisomers allowed for the determination of hitherto unknown flavanone racemization rates. Fcr formed the corresponding dihydrochalcones and hydroxydihydrochalcones in the course of an unusual reductive cleavage of cyclic ether bonds. Fcr did not convert members of other flavonoid subclasses, including flavones, flavonols, and chalcones, the latter indicating that the reaction does not involve a chalcone intermediate. This view is strongly supported by the observed enantiospecificity of Fcr. Cinnamic acids, which are typical substrates of bacterial enoate reductases, were also not reduced by Fcr. Based on the presence of binding motifs for dinucleotide cofactors and a 4Fe-4S cluster in the amino acid sequence of Fcr, a cofactor-mediated hydride transfer from NADH onto C-2 of the respective substrate is proposed.IMPORTANCE Gut bacteria play a crucial role in the metabolism of dietary flavonoids, thereby contributing to their activation or inactivation after ingestion by the human host. Thus, bacterial activities in the intestine may influence the beneficial health effects of these polyphenolic plant compounds. While an increasing number of flavonoid-converting gut bacterial species have been identified, knowledge of the responsible enzymes is still limited. Here, we characterized Fcr as a key enzyme involved in the conversion of flavonoids of several subclasses by Eubacterium ramulus, a prevalent human gut bacterium. Sequence similarity of this enzyme to hypothetical proteins from other flavonoid-degrading intestinal bacteria in databases suggests a more widespread occurrence of this enzyme. Functional characterization of gene products of human intestinal microbiota enables the assignment of metagenomic sequences to specific bacteria and, more importantly, to certain activities, which is a prerequisite for targeted modulation of gut microbial functionality.
Collapse
Affiliation(s)
- Annett Braune
- Department of Gastrointestinal Microbiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
| | - Michael Gütschow
- Pharmaceutical Institute, Pharmaceutical Chemistry I, University of Bonn, Bonn, Germany
| | - Michael Blaut
- Department of Gastrointestinal Microbiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
- Institute of Nutritional Sciences, University of Potsdam, Nuthetal, Germany
| |
Collapse
|
24
|
Łużny M, Krzywda M, Kozłowska E, Kostrzewa-Susłow E, Janeczko T. Effective Hydrogenation of 3-(2"-furyl)- and 3-(2"-thienyl)-1-(2'-hydroxyphenyl)-prop-2-en-1-one in Selected Yeast Cultures. Molecules 2019; 24:E3185. [PMID: 31480751 PMCID: PMC6749209 DOI: 10.3390/molecules24173185] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 08/30/2019] [Accepted: 08/31/2019] [Indexed: 11/18/2022] Open
Abstract
Biotransformations were performed on eight selected yeast strains, all of which were able to selectively hydrogenate the chalcone derivatives 3-(2"-furyl)- (1) and 3-(2"-thienyl)-1-(2'-hydroxyphenyl)-prop-2-en-1-one (3) into 3-(2"-furyl)- (2) and 3-(2"-thienyl)-1-(2'-hydroxyphenyl)-propan-1-one (4) respectively. The highest efficiency of hydrogenation of the double bond in the substrate 1 was observed in the cultures of Saccharomyces cerevisiae KCh 464 and Yarrowia lipolytica KCh 71 strains. The substrate was converted into the product with > 99% conversion just in six hours after biotransformation started. The compound containing the sulfur atom in its structure was most effectively transformed by the Yarrowia lipolytica KCh 71 culture strain (conversion > 99%, obtained after three hours of substrate incubation). Also, we observed that, different strains of tested yeasts are able to carry out the bioreduction of the used substrate with different yields, depending on the presence of induced and constitutive ene reductases in their cells. The biggest advantage of this process is the efficient production of one product, practically without the formation of side products.
Collapse
Affiliation(s)
- Mateusz Łużny
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland.
| | - Martyna Krzywda
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
| | - Ewa Kozłowska
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
| | - Edyta Kostrzewa-Susłow
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
| | - Tomasz Janeczko
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland.
| |
Collapse
|
25
|
Khaled A, Sleiman M, Darras E, Trivella A, Bertrand C, Inguimbert N, Goupil P, Richard C. Photodegradation of Myrigalone A, an Allelochemical from Myrica gale: Photoproducts and Effect of Terpenes. J Agric Food Chem 2019; 67:7258-7265. [PMID: 31188589 DOI: 10.1021/acs.jafc.9b01722] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This study investigated the environmental fate of myrigalone A, a light absorbing natural herbicide found on leaves and fruits of Myrica gale. Myrigalone A was irradiated in water and as a dry solid deposit to simulate reactions on leaves, alone and in the presence of the terpenes generated by Myrica gale. The phototransformation was fast ( t1/2 = 35 min in water). Analyses by liquid chromatography coupled to high resolution orbitrap electrospray mass spectrometry (MS) and gas chromatography-MS revealed the formation of 11 photoproducts in water and solid and 9 in gaseous phase. Some were detected in the leaf glands and oil covering the fruits of Myrica gale, which suggested that photodegradation occurred in the field. Moreover, myrigalone A photoinduced the oxidation of terpenes that in turn protected it against photolysis. This highlights the need for additional research on the effect of terpenes on the photodegradation of pesticides on vegetation.
Collapse
Affiliation(s)
- Amina Khaled
- CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand , Université Clermont Auvergne , F-63000 Clermont-Ferrand , France
| | - Mohamad Sleiman
- CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand , Université Clermont Auvergne , F-63000 Clermont-Ferrand , France
| | - Etienne Darras
- CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand , Université Clermont Auvergne , F-63000 Clermont-Ferrand , France
| | - Aurélien Trivella
- UMR CNRS 5805 EPOC - OASU, Equipe LPTC, IUT de Périgueux , Rue du Doyen Lajugie , 24000 Périgueux , France
| | - Cédric Bertrand
- USR 3278 CRIOBE, PSL Research University, EPHE-UPVD-CNRS, Université de Perpignan Via Domitia, Laboratoire d'Excellence ≪ CORAIL ≫ , Bâtiment T, 58 avenue P. Alduy , 66860 Perpignan , France
- AkiNaO SAS , F-66860 Perpignan , France
| | - Nicolas Inguimbert
- USR 3278 CRIOBE, PSL Research University, EPHE-UPVD-CNRS, Université de Perpignan Via Domitia, Laboratoire d'Excellence ≪ CORAIL ≫ , Bâtiment T, 58 avenue P. Alduy , 66860 Perpignan , France
| | - Pascale Goupil
- INRA, PIAF , Université Clermont Auvergne , F-63000 Clermont-Ferrand , France
| | - Claire Richard
- CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand , Université Clermont Auvergne , F-63000 Clermont-Ferrand , France
| |
Collapse
|
26
|
Polo E, Ibarra-Arellano N, Prent-Peñaloza L, Morales-Bayuelo A, Henao J, Galdámez A, Gutiérrez M. Ultrasound-assisted synthesis of novel chalcone, heterochalcone and bis-chalcone derivatives and the evaluation of their antioxidant properties and as acetylcholinesterase inhibitors. Bioorg Chem 2019; 90:103034. [PMID: 31280015 DOI: 10.1016/j.bioorg.2019.103034] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 05/17/2019] [Accepted: 06/03/2019] [Indexed: 01/19/2023]
Abstract
The chalcone and bis-chalcone derivatives have been synthesized under sonication conditions via Claisen-Schmidt condensation with KOH in ethanol at room temperature (20-89%). The structures were established on the basis of NMR, IR, Single-crystal XRD, and MS. The best compound 3u had inhibitory activity (IC50 = 7.50 µM). The synthesis, the antioxidative properties, chemical reactivity descriptors supported in Density Functional Theory (DFT), acetylcholinesterase (AChE) inhibition and their potential binding modes, and affinity were predicted by molecular docking of a number of morpholine-chalcones and quinoline-chalcone. A series of bis-chalcones are also reported. Molecular docking and an enzyme kinetic study on compound 3u suggested that it simultaneously binds to the catalytic active site (CAS) and peripheral anionic site (PAS) of AChE. Moreover, the pharmacokinetic profile of these compounds was investigated using a computational method.
Collapse
Affiliation(s)
- Efraín Polo
- Laboratorio de Síntesis Orgánica, Instituto de Química de Recursos Naturales, Universidad de Talca, Casilla 747, Talca 3460000, Chile
| | - Nicol Ibarra-Arellano
- Laboratorio de Síntesis Orgánica, Instituto de Química de Recursos Naturales, Universidad de Talca, Casilla 747, Talca 3460000, Chile
| | - Luis Prent-Peñaloza
- Laboratorio de Síntesis Orgánica, Instituto de Química de Recursos Naturales, Universidad de Talca, Casilla 747, Talca 3460000, Chile
| | - Alejandro Morales-Bayuelo
- Ciencias de la Salud, Grupo de Investigaciones Básicas y Clínicas de la Universidad del Sinú (GIBACUS), escuela de medicina, Universidad del Sinú, seccional Cartagena, Colombia
| | - José Henao
- Grupo de Investigación en Química Estructural (GIQUE), Escuela de Química, Facultad de Ciencias, Universidad Industrial de Santander, A.A. 678, Carrera 27, Calle 9 Ciudadela Universitaria, Bucaramanga, Colombia
| | - Antonio Galdámez
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile
| | - Margarita Gutiérrez
- Laboratorio de Síntesis Orgánica, Instituto de Química de Recursos Naturales, Universidad de Talca, Casilla 747, Talca 3460000, Chile.
| |
Collapse
|
27
|
de Matos IL, Nitschke M, Porto ALM. Hydrogenation of Halogenated 2'-Hydroxychalcones by Mycelia of Marine-Derived Fungus Penicillium raistrickii. Mar Biotechnol (NY) 2019; 21:430-439. [PMID: 30895403 DOI: 10.1007/s10126-019-09893-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 02/27/2019] [Indexed: 06/09/2023]
Abstract
This study describes the chemoselective hydrogenation reaction of halogenated 2'-hydroxychalcones by the marine-derived fungus Penicillium raistrickii CBMAI 931. Initially, 2'-hydroxychalcone was utilized as a model for the selection of the appropriate conditions to perform the biotransformation reactions. The best results were obtained using mycelia and filtered culture broth, and this condition was chosen for the biotransformation reaction of 2'-hydroxychalcones substituted with methoxy and halogen groups. Experiments performed with 2'-hydroxychalcones dissolved in 600 μL-DMSO were more effective than those performed using 300 μL-DMSO, once solubility of the compounds influenced conversion rate in the liquid medium. The halogenated 2'-hydroxy-dihydrochalcones were obtained in good conversions (78-99%) and moderate isolated yields (31-65%). All biotransformation reactions using the marine-derived fungus P. raistrickii CBMAI 931 showed regioselective and chemoselective control for the formation of 2'-hydroxy-dihydrochalcones.
Collapse
Affiliation(s)
- Iara Lisboa de Matos
- Laboratório de Química Orgânica e Biocatálise, Instituto de Química de São Carlos, Universidade de São Paulo, Av. João Dagnone, 1100, Ed. Química Ambiental, Jd. Santa Angelina, São Carlos, São Paulo, 13563-120, Brazil
| | - Marcia Nitschke
- Laboratório de Biotecnologia Microbiana, Instituto de Química de São Carlos, Universidade de São Paulo, Av. João Dagnone, 1100, Ed. Química Ambiental, Jd. Santa Angelina, São Carlos, São Paulo, 13563-120, Brazil
| | - André Luiz Meleiro Porto
- Laboratório de Química Orgânica e Biocatálise, Instituto de Química de São Carlos, Universidade de São Paulo, Av. João Dagnone, 1100, Ed. Química Ambiental, Jd. Santa Angelina, São Carlos, São Paulo, 13563-120, Brazil.
| |
Collapse
|
28
|
Mazibuko-Mbeje SE, Dludla PV, Johnson R, Joubert E, Louw J, Ziqubu K, Tiano L, Silvestri S, Orlando P, Opoku AR, Muller CJF. Aspalathin, a natural product with the potential to reverse hepatic insulin resistance by improving energy metabolism and mitochondrial respiration. PLoS One 2019; 14:e0216172. [PMID: 31048842 PMCID: PMC6497260 DOI: 10.1371/journal.pone.0216172] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 04/14/2019] [Indexed: 02/07/2023] Open
Abstract
Aspalathin is a rooibos flavonoid with established blood glucose lowering properties, however, its efficacy to moderate complications associated with hepatic insulin resistance is unknown. To study such effects, C3A liver cells exposed to palmitate were used as a model of hepatic insulin resistance. These hepatocytes displayed impaired substrate metabolism, including reduced glucose transport and free fatty acid uptake. These defects included impaired insulin signaling, evident through reduced phosphatidylinositol-4,5-bisphosphate 3-kinase/ protein kinase B (PI3K/AKT) protein expression, and mitochondrial dysfunction, depicted by a lower mitochondrial respiration rate. Aspalathin was able to ameliorate these defects by correcting altered substrate metabolism, improving insulin signaling and mitochondrial bioenergetics. Activation of 5ʹ-adenosine monophosphate-activated protein kinase (AMPK) may be a plausible mechanism by which aspalathin increases hepatic energy expenditure. Overall, these results encourage further studies assessing the potential use of aspalathin as a nutraceutical to improve hepatocellular energy expenditure, and reverse metabolic disease-associated complications.
Collapse
Affiliation(s)
- Sithandiwe E. Mazibuko-Mbeje
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg, South Africa
- * E-mail:
| | - Phiwayinkosi V. Dludla
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Rabia Johnson
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg, South Africa
| | - Elizabeth Joubert
- Plant Bioactives Group, Post-Harvest and Agro-Processing Technologies, Agricultural Research Council, Infruitec-Nietvoorbij, Stellenbosch, South Africa
- Department of Food Science, Stellenbosch University, Stellenbosch, South Africa
| | - Johan Louw
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg, South Africa
- Department of Biochemistry and Microbiology, University of Zululand, KwaDlangezwa, South Africa
| | - Khanyisani Ziqubu
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg, South Africa
- Department of Biochemistry and Microbiology, University of Zululand, KwaDlangezwa, South Africa
| | - Luca Tiano
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Sonia Silvestri
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Patrick Orlando
- Department of Life and Environmental Sciences, Polytechnic University of Marche, Ancona, Italy
| | - Andy R. Opoku
- Department of Biochemistry and Microbiology, University of Zululand, KwaDlangezwa, South Africa
| | - Christo J. F. Muller
- Biomedical Research and Innovation Platform, South African Medical Research Council, Tygerberg, South Africa
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg, South Africa
- Department of Biochemistry and Microbiology, University of Zululand, KwaDlangezwa, South Africa
| |
Collapse
|
29
|
Shah MS, Najam-Ul-Haq M, Shah HS, Farooq Rizvi SU, Iqbal J. Quinoline containing chalcone derivatives as cholinesterase inhibitors and their in silico modeling studies. Comput Biol Chem 2018; 76:310-317. [PMID: 30142564 DOI: 10.1016/j.compbiolchem.2018.08.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 07/15/2018] [Accepted: 08/10/2018] [Indexed: 11/18/2022]
Abstract
Cholinesterases (ChEs) play a vital role in regulating cholinergic transmission. Inhibition of ChEs is thought to be an emerging and useful therapeutic target for neurodegenerative disorders through restoration of acetylcholine (ACh) levels in the brain (e.g. Alzheimer's disease). To increase the chemical diversity of cholinesterase inhibitors, a series of quinoline chalcones derivatives were tested against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) isoenzymes. All tested compounds (4a-1; 5a-s) exhibited inhibitory activities against AChE and BChE to a considerable extent. Molecular docking studies were performed by using homology models on both AChE and BChE isoenzymes with the aim of exploring probable binding modes of the most potent inhibitor. In order to evaluate drug likeness of newly tested molecules, we carried out in-silico ADME evaluation. All compounds displayed favourable ADME findings which predict good oral bioavailability of these derivatives. Due to an excellent ADME profile the tested compounds were predicted to be safer which can be considered as novel cholinesterase inhibitors.
Collapse
Affiliation(s)
- Muhammad Shakil Shah
- Centre for Advanced Drug Research, COMSATS University, Islambad, Abbottabad Campus, Abbottabad, 22060, Pakistan; Division of Analytical Chemistry, Institute of Chemical Science, Bahauddin Zakariya University, 60800, Multan, Pakistan
| | - Muhammad Najam-Ul-Haq
- Division of Analytical Chemistry, Institute of Chemical Science, Bahauddin Zakariya University, 60800, Multan, Pakistan
| | - Hamid Saeed Shah
- Centre for Advanced Drug Research, COMSATS University, Islambad, Abbottabad Campus, Abbottabad, 22060, Pakistan; College of Pharmacy, University of Sargodha, Sargodha, 40100, Pakistan
| | | | - Jamshed Iqbal
- Centre for Advanced Drug Research, COMSATS University, Islambad, Abbottabad Campus, Abbottabad, 22060, Pakistan.
| |
Collapse
|
30
|
Johnson R, Beer DD, Dludla PV, Ferreira D, Muller CJF, Joubert E. Aspalathin from Rooibos (Aspalathus linearis): A Bioactive C-glucosyl Dihydrochalcone with Potential to Target the Metabolic Syndrome. Planta Med 2018; 84:568-583. [PMID: 29388183 DOI: 10.1055/s-0044-100622] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Aspalathin is a C-glucosyl dihydrochalcone that is abundantly present in Aspalathus linearis. This endemic South African plant, belonging to the Cape Floristic region, is normally used for production of rooibos, a herbal tea. Aspalathin was valued initially only as precursor in the formation of the characteristic red-brown colour of "fermented" rooibos, but the hype about the potential role of natural antioxidants to alleviate oxidative stress, shifted interest in aspalathin to its antioxidant properties and subsequently, its potential role to improve metabolic syndrome, a disease condition interrelated with oxidative stress. The potential use of aspalathin or aspalathin-rich rooibos extracts as a condition-specific nutraceutical is hampered by the limited supply of green rooibos (i.e., "unfermented" plant material) and low levels in "fermented" rooibos, providing incentive for its synthesis. In vitro and in vivo studies relating to the metabolic activity of aspalathin are discussed and cellular mechanisms by which aspalathin improves glucose and lipid metabolism are proposed. Other aspects covered in this review, which are relevant in view of the potential use of aspalathin as an adjunctive therapy, include its poor stability and bioavailability, as well as potential adverse herb-drug interactions, in particular interference with the metabolism of certain commonly prescribed chronic medications for hyperglycaemia and dyslipidaemia.
Collapse
Affiliation(s)
- Rabia Johnson
- Biomedical Research and Innovation Platform (BRIP), Medical Research Council (MRC), Tygerberg, South Africa
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg, South Africa
| | - Dalene de Beer
- Plant Bioactives Group, Post-Harvest and Agro-Processing Technologies, Agricultural Research Council (ARC), Infruitec-Nietvoorbij, Stellenbosch, South Africa
- Department of Food Science, Stellenbosch University, Stellenbosch, South Africa
| | - Phiwayinkosi V Dludla
- Biomedical Research and Innovation Platform (BRIP), Medical Research Council (MRC), Tygerberg, South Africa
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg, South Africa
| | - Daneel Ferreira
- Department of BioMolecular Sciences, Division of Pharmacognosy and the Research Institute of Pharmaceutical Sciences, School of Pharmacy, The University of Mississippi, Oxford, Mississippi, United States
| | - Christo J F Muller
- Biomedical Research and Innovation Platform (BRIP), Medical Research Council (MRC), Tygerberg, South Africa
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg, South Africa
- Department of Biochemistry and Microbiology, University of Zululand, Kwadlangezwa, South Africa
| | - Elizabeth Joubert
- Plant Bioactives Group, Post-Harvest and Agro-Processing Technologies, Agricultural Research Council (ARC), Infruitec-Nietvoorbij, Stellenbosch, South Africa
- Department of Food Science, Stellenbosch University, Stellenbosch, South Africa
| |
Collapse
|
31
|
Sankaran S, Balasubramanian R. Reoirt: Insight into the lipophilicity of selected monosubstituted chalcones. Pak J Pharm Sci 2018; 31:941-946. [PMID: 29716877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This study represents our attempt to understand how the antimicrobial activity of chalcones is modulated by their lipophilicity. To achieve this overall objective, a library of monosubstituted chalcones was targeted after careful consideration of the stereo electronic properties of the substituents appended in each of its constituent members. The lipophilicities of these derivatives were determined experimentally as well as by means of different validated computational programs. The theoretical determination was necessitated by the long-winded and time-consuming experimental protocols involved. It was gratifying to note the good correlation between these determinations which indicated the suitability of using such theoretical descriptors not only for assessing the lipophilicity of putative lead molecules but also for evaluating their biological activity. Standard disc diffusion technique employed against gram positive & negative bacteria as well as fungi revealed some preliminary information about the antimicrobial activity of these analogues.
Collapse
Affiliation(s)
- Sandeep Sankaran
- Department of Pharmaceutical Chemistry, Bombay College of Pharmacy, Kalina, Santacruz (E), Mumbai, Maharashtra, India
| | - Ranganathan Balasubramanian
- Department of Pharmaceutical Chemistry, Amrita School of Pharmacy, Amrita Vishwa Vidyapeetham University, Health Sciences Campus, Kochi, Kerala, India
| |
Collapse
|
32
|
Keiler AM, Macejova D, Dietz BM, Bolton JL, Pauli GF, Chen SN, van Breemen RB, Nikolic D, Goerl F, Muders MH, Zierau O, Vollmer G. Evaluation of estrogenic potency of a standardized hops extract on mammary gland biology and on MNU-induced mammary tumor growth in rats. J Steroid Biochem Mol Biol 2017; 174:234-241. [PMID: 28964928 PMCID: PMC5760272 DOI: 10.1016/j.jsbmb.2017.09.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 09/25/2017] [Accepted: 09/27/2017] [Indexed: 12/12/2022]
Abstract
Supplements with estrogenic activities are intensively investigated as potential alternatives for the treatment of menopausal symptoms. These investigations include studies on their safety regarding potential breast cancer risks. Therefore, the aim of this study was to assess whether or not a standardized hops (Humulus lupulus) extract, containing 0.42% of the estrogenic flavanone, 8-prenylnaringenin, would stimulate growth of methyl-nitrosourea (MNU) induced mammary cancer in ovariectomized (OVX) Sprague-Dawley (SD) rats or would impact on the proliferative activity within the normal mammary gland of Wistar rats. To induce tumorigenesis SD-rats received an intraperitoneal injection of 50mg/kg body weight of MNU on postnatal days PND 50 and 52. 28days later animals were OVX or were SHAM operated (positive control) and randomly allocated and maintained for 140days on either a phytoestrogen-free placebo diet (SHAM and negative control) or on the hops fortified diet. For the investigations in the normal mammary gland young adult Wistar rats were bilaterally OVX and randomly allocated to a control group fed to a phytoestrogen-free diet, or to a diet supplemented either with E2-benzoate or the hops extract. As a major result, the tumor incidence was 15% (3 tumors totally) in OVX controls, whereas it was 85% (39 tumors totally) in SHAM operated positive controls. No tumors were detectable in the hops group. In addition, no estrogenic activity of the hops extract was detectable in uterus and liver of these animals. In investigations on the normal mammary gland, no impact of hops extract on the expression of estrogen dependent proliferation markers or of progesterone receptor became apparent. In conclusion, the lack of growth stimulation of MNU-induced breast cancer in OVX SD-rats and the lack of stimulation proliferative events in the normal mammary gland of OVX Wistar rats by standardized hops extracts provides an important piece of evidence regarding the safety of these extracts in the management of menopausal symptoms.
Collapse
Affiliation(s)
- Annekathrin M Keiler
- Chair for Molecular Cell Physiology & Endocrinology, Department of Biology, Technische Universität Dresden, 01062 Dresden, Germany; Institute for Doping Analytics and Sports Biochemistry Dresden (IDAS), Dresdner Str. 12, 01731 Kreischa, Germany
| | - Dana Macejova
- Laboratory of Molecular Endocrinology, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Birgit M Dietz
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, USA
| | - Judy L Bolton
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, USA
| | - Guido F Pauli
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, USA
| | - Shao-Nong Chen
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, USA
| | - Richard B van Breemen
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, USA
| | - Dejan Nikolic
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL, USA
| | - Florian Goerl
- Institute for Pathology, 01454 Radeberg, Germany; Institute for Pathology, University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
| | - Michael H Muders
- Institute for Pathology, University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
| | - Oliver Zierau
- Chair for Molecular Cell Physiology & Endocrinology, Department of Biology, Technische Universität Dresden, 01062 Dresden, Germany
| | - Günter Vollmer
- Chair for Molecular Cell Physiology & Endocrinology, Department of Biology, Technische Universität Dresden, 01062 Dresden, Germany.
| |
Collapse
|
33
|
Kostrzewa-Susłow E, Dymarska M, Guzik U, Wojcieszyńska D, Janeczko T. Stenotrophomonas maltophilia: A Gram-Negative Bacterium Useful for Transformations of Flavanone and Chalcone. Molecules 2017; 22:molecules22111830. [PMID: 29077064 PMCID: PMC6150369 DOI: 10.3390/molecules22111830] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 10/22/2017] [Indexed: 11/16/2022] Open
Abstract
A group of flavones, isoflavones, flavanones, and chalcones was subjected to small-scale biotransformation studies with the Gram-negative Stenotrophomonas maltophilia KB2 strain in order to evaluate the capability of this strain to transform flavonoid compounds and to investigate the relationship between compound structure and transformation type. The tested strain transformed flavanones and chalcones. The main type of transformation of compounds with a flavanone moiety was central heterocyclic C ring cleavage, leading to chalcone and dihydrochalcone structures, whereas chalcones underwent reduction to dihydrochalcones and cyclisation to a benzo-γ-pyrone moiety. Substrates with a C-2–C-3 double bond (flavones and isoflavones) were not transformed by Stenotrophomonas maltophilia KB2.
Collapse
Affiliation(s)
- Edyta Kostrzewa-Susłow
- Department of Chemistry, Faculty of Biotechnology and Food Science, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland.
| | - Monika Dymarska
- Department of Chemistry, Faculty of Biotechnology and Food Science, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland.
| | - Urszula Guzik
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellonska 28, 40-032 Katowice, Poland.
| | - Danuta Wojcieszyńska
- Department of Biochemistry, Faculty of Biology and Environmental Protection, University of Silesia in Katowice, Jagiellonska 28, 40-032 Katowice, Poland.
| | - Tomasz Janeczko
- Department of Chemistry, Faculty of Biotechnology and Food Science, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland.
| |
Collapse
|
34
|
Ito T, Fujimoto S, Suito F, Shimosaka M, Taguchi G. C-Glycosyltransferases catalyzing the formation of di-C-glucosyl flavonoids in citrus plants. Plant J 2017; 91:187-198. [PMID: 28370711 DOI: 10.1111/tpj.13555] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 03/24/2017] [Indexed: 05/05/2023]
Abstract
Citrus plants accumulate many kinds of flavonoids, including di-C-glucosyl flavonoids, which have attracted considerable attention due to their health benefits. However, the biosynthesis of di-C-glucosyl flavonoids has not been elucidated at the molecular level. Here, we identified the C-glycosyltransferases (CGTs) FcCGT (UGT708G1) and CuCGT (UGT708G2) as the primary enzymes involved in the biosynthesis of di-C-glucosyl flavonoids in the citrus plants kumquat (Fortunella crassifolia) and satsuma mandarin (Citrus unshiu), respectively. The amino acid sequences of these CGTs were 98% identical, indicating that CGT genes are highly conserved in the citrus family. The recombinant enzymes FcCGT and CuCGT utilized 2-hydroxyflavanones, dihydrochalcone, and their mono-C-glucosides as sugar acceptors and produced corresponding di-C-glucosides. The Km and kcat values of FcCGT toward phloretin were <0.5 μm and 12.0 sec-1 , and those toward nothofagin (3'-C-glucosylphloretin) were 14.4 μm and 5.3 sec-1 , respectively; these values are comparable with those of other glycosyltransferases reported to date. Transcripts of both CGT genes were found to concentrate in various plant organs, and particularly in leaves. Our results suggest that di-C-glucosyl flavonoid biosynthesis proceeds via a single enzyme using either 2-hydroxyflavanones or phloretin as a substrate in citrus plants. In addition, Escherichia coli cells expressing CGT genes were found to be capable of producing di-C-glucosyl flavonoids, which is promising for commercial production of these valuable compounds.
Collapse
Affiliation(s)
- Takamitsu Ito
- Department of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, 386-8567, Japan
| | - Shunsuke Fujimoto
- Department of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, 386-8567, Japan
| | - Fumiaki Suito
- Department of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, 386-8567, Japan
| | - Makoto Shimosaka
- Department of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, 386-8567, Japan
| | - Goro Taguchi
- Department of Applied Biology, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, 386-8567, Japan
| |
Collapse
|
35
|
Dare AP, Yauk YK, Tomes S, McGhie TK, Rebstock RS, Cooney JM, Atkinson RG. Silencing a phloretin-specific glycosyltransferase perturbs both general phenylpropanoid biosynthesis and plant development. Plant J 2017; 91:237-250. [PMID: 28370633 DOI: 10.1111/tpj.13559] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 03/16/2017] [Accepted: 03/24/2017] [Indexed: 05/19/2023]
Abstract
The polyphenol profile of apple (Malus × domestica) is dominated by the dihydrochalcone glycoside phloridzin, but its physiological role is yet to be elucidated. Biosynthesis of phloridzin occurs as a side branch of the main phenylpropanoid pathway, with the final step mediated by the phloretin-specific glycosyltransferase UGT88F1. Unexpectedly, given that UGTs are sometimes viewed as 'decorating enzymes', UGT88F1 knockdown lines were severely dwarfed, with greatly reduced internode lengths, narrow lanceolate leaves, and changes in leaf and fruit cellular morphology. These changes suggested that auxin transport had been altered in the knockdown lines, which was confirmed in assays showing that auxin flux from the shoot apex was increased in the transgenic lines. Metabolite analysis revealed no accumulation of the phloretin aglycone, as well as decreases in many non-target phenylpropanoid compounds. This decreased accumulation of metabolites appeared to be mediated by the repression of the phenylpropanoid pathway via a reduction in key transcript levels (e.g. phenylalanine ammonia lyase, PAL) and enzyme activities (PAL and chalcone synthase). Application of exogenous phloridzin to the UGT88F1 knockdown lines in tissue culture enhanced axial leaf growth and partially restored some aspects of 'normal' apple leaf growth. Together, our results strongly implicate dihydrochalcones as critical compounds in modulating phenylpropanoid pathway flux and establishing auxin patterning early in apple development.
Collapse
Affiliation(s)
- Andrew P Dare
- The New Zealand Institute for Plant & Food Research Limited (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Yar-Khing Yauk
- The New Zealand Institute for Plant & Food Research Limited (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Sumathi Tomes
- The New Zealand Institute for Plant & Food Research Limited (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | - Tony K McGhie
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Ria S Rebstock
- The New Zealand Institute for Plant & Food Research Limited (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| | | | - Ross G Atkinson
- The New Zealand Institute for Plant & Food Research Limited (PFR), Private Bag 92169, Auckland, 1142, New Zealand
| |
Collapse
|
36
|
Nguyen GTT, Erlenkamp G, Jäck O, Küberl A, Bott M, Fiorani F, Gohlke H, Groth G. Chalcone-based Selective Inhibitors of a C4 Plant Key Enzyme as Novel Potential Herbicides. Sci Rep 2016; 6:27333. [PMID: 27263468 PMCID: PMC4893628 DOI: 10.1038/srep27333] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 05/18/2016] [Indexed: 11/08/2022] Open
Abstract
Weeds are a challenge for global food production due to their rapidly evolving resistance against herbicides. We have identified chalcones as selective inhibitors of phosphoenolpyruvate carboxylase (PEPC), a key enzyme for carbon fixation and biomass increase in the C4 photosynthetic pathway of many of the world's most damaging weeds. In contrast, many of the most important crop plants use C3 photosynthesis. Here, we show that 2',3',4',3,4-Pentahydroxychalcone (IC50 = 600 nM) and 2',3',4'-Trihydroxychalcone (IC50 = 4.2 μM) are potent inhibitors of C4 PEPC but do not affect C3 PEPC at a same concentration range (selectivity factor: 15-45). Binding and modeling studies indicate that the active compounds bind at the same site as malate/aspartate, the natural feedback inhibitors of the C4 pathway. At the whole plant level, both substances showed pronounced growth-inhibitory effects on the C4 weed Amaranthus retroflexus, while there were no measurable effects on oilseed rape, a C3 plant. Growth of selected soil bacteria was not affected by these substances. Our chalcone compounds are the most potent and selective C4 PEPC inhibitors known to date. They offer a novel approach to combat C4 weeds based on a hitherto unexplored mode of allosteric inhibition of a C4 plant key enzyme.
Collapse
Affiliation(s)
- G. T. T. Nguyen
- Biochemical Plant Physiology, Heinrich Heine University Düsseldorf and Bioeconomy Science Center (BioSC), Universitätsstr.1, 40225 Düsseldorf, Germany
| | - G. Erlenkamp
- Pharmaceutical and Medicinal Chemistry, Heinrich Heine University Düsseldorf and Bioeconomy Science Center (BioSC), Universitätsstr.1, 40225 Düsseldorf, Germany
| | - O. Jäck
- Institute of Bio- and Geosciences, IBG-2: Plant Sciences, Forschungszentrum Jülich and Bioeconomy Science Center (BioSC), Wilhelm-Johnen-Straße, 52425 Jülich, Germany
| | - A. Küberl
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich and Bioeconomy Science Center (BioSC), Wilhelm-Johnen-Straße, 52425 Jülich, Germany
| | - M. Bott
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich and Bioeconomy Science Center (BioSC), Wilhelm-Johnen-Straße, 52425 Jülich, Germany
| | - F. Fiorani
- Institute of Bio- and Geosciences, IBG-2: Plant Sciences, Forschungszentrum Jülich and Bioeconomy Science Center (BioSC), Wilhelm-Johnen-Straße, 52425 Jülich, Germany
| | - H. Gohlke
- Pharmaceutical and Medicinal Chemistry, Heinrich Heine University Düsseldorf and Bioeconomy Science Center (BioSC), Universitätsstr.1, 40225 Düsseldorf, Germany
| | - G. Groth
- Biochemical Plant Physiology, Heinrich Heine University Düsseldorf and Bioeconomy Science Center (BioSC), Universitätsstr.1, 40225 Düsseldorf, Germany
| |
Collapse
|
37
|
Toprak M. Fluorescence study on the interaction of human serum albumin with Butein in liposomes. Spectrochim Acta A Mol Biomol Spectrosc 2016; 154:108-113. [PMID: 26519918 DOI: 10.1016/j.saa.2015.10.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 09/03/2015] [Accepted: 10/22/2015] [Indexed: 06/05/2023]
Abstract
The interaction of Butein with human serum albumin in L-egg lecithin phosphatidycholine (PC) liposome has been investigated by fluorescence and absorption spectroscopy. The results of the fluorescence measurement indicated that Butein effectively quenched the intrinsic fluorescence of HSA via static quenching. The Stern–Volmer plots in all the liposome solutions showed a positive deviation from the linearity. According to the thermodynamic parameters, the hydrophobic interactions appeared be the major interaction forces between Butein and HSA. The effect of Butein on the conformation of HSA was also investigated by the synchronous fluorescence under the same experimental conditions. In addition, the partition coefficient of the Butein in the PC liposomes was also determined by using the fluorescence quenching process. The obtained results can be of biological significance in pharmacology and clinical medicine.
Collapse
Affiliation(s)
- Mahmut Toprak
- Department of Chemistry, Bingol University, Bingol 12000, Turkey.
| |
Collapse
|
38
|
De Spirt S, Eckers A, Wehrend C, Micoogullari M, Sies H, Stahl W, Steinbrenner H. Interplay between the chalcone cardamonin and selenium in the biosynthesis of Nrf2-regulated antioxidant enzymes in intestinal Caco-2 cells. Free Radic Biol Med 2016; 91:164-71. [PMID: 26698667 DOI: 10.1016/j.freeradbiomed.2015.12.011] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 12/04/2015] [Accepted: 12/11/2015] [Indexed: 02/09/2023]
Abstract
Selenoenzymes and nuclear factor erythroid 2-related factor 2 (Nrf2)-regulated phase II enzymes comprise key components of the cellular redox and antioxidant systems, which show multiple interrelations. Deficiency of the micronutrient selenium (Se) and impaired biosynthesis of selenoproteins have been reported to result in induction of Nrf2 target genes. Conversely, transcription of the selenoenzymes glutathione peroxidase 2 (GPx2) and thioredoxin reductase 1 (TrxR1) is up-regulated upon Nrf2 activation. Here, we have studied the interplay between Se and the secondary plant metabolite cardamonin, an Nrf2-activating chalcone, in the regulation of Nrf2-controlled antioxidant enzymes. Se-deficient and Se-repleted (sodium selenite-supplemented) human intestinal Caco-2 cells were exposed to cardamonin. Uptake of cardamonin by the Caco-2 cells was independent of their Se status. Cardamonin strongly induced gene expression of GPx2 and TrxR1. However, cardamonin treatment did not result in elevated GPx or TrxR activity and protein levels, possibly relating to a concomitant down-regulation of O-phosphoseryl-tRNA(Sec) kinase (PSTK), an enzyme involved in translation of selenoprotein mRNAs. On the other hand, induction of the Nrf2-regulated enzyme heme oxygenase 1 (HO-1) by cardamonin was diminished in Se-replete compared to Se-deficient cells. Our findings suggest that cardamonin interferes with the biosynthesis of Nrf2-regulated selenoenzymes, in contrast to the Nrf2-activating isothiocyanate compound sulforaphane, which has been shown earlier to synergize with Se-mediated cytoprotection. Conversely, the cellular Se status apparently affects the cardamonin-mediated induction of non-selenoprotein antioxidant enzymes such as HO-1.
Collapse
Affiliation(s)
- Silke De Spirt
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Anna Eckers
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany; IUF-Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
| | - Carina Wehrend
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Mustafa Micoogullari
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Helmut Sies
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany; IUF-Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany; College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Wilhelm Stahl
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Holger Steinbrenner
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany; Institute of Nutrition, Department of Nutrigenomics, Friedrich-Schiller-University, Jena, Germany.
| |
Collapse
|
39
|
Mathew B, Haridas A, Suresh J, Mathew GE, Uçar G, Jayaprakash V. Monoamine Oxidase Inhibitory Action of Chalcones: A Mini Review. Cent Nerv Syst Agents Med Chem 2016; 16:120-136. [PMID: 26429556 DOI: 10.2174/1871524915666151002124443] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 09/27/2015] [Accepted: 10/02/2015] [Indexed: 06/05/2023]
Abstract
INTRODUCTION Chalcones are one of the major classes of naturally occurring compounds and have a vast significance in medicinal chemistry, presenting with a wide scope of pharmacological actions. DISCUSSION The present review focused our attention onto the monoamine oxidase inhibitory activity of natural and synthetic chalcones. The review also emphasises the structure-activity relationship studies and molecular recognition of chalcones towards MAO-A and B inhibition. CONCLUSION Many of the studies clearly revealed that most of the chalcones showed selective, reversible and potent MAO-B inhibition compared to MAO-A. Recent studies also showed that heteroaryl-based chalcones are potent MAO-A inhibitors.
Collapse
Affiliation(s)
- Bijo Mathew
- Division of Drug Design and Medicinal Chemistry Research Lab, Department of Pharmaceutical Chemistry, Grace, College of Pharmacy, Palakkad -678004, Kerala, India.
| | | | | | | | | | | |
Collapse
|
40
|
Mathew B, Dev S, Suresh J, Mathew GE, Lakshmanan B, Haridas A, Fathima F, Krishnan GK. Pharmacophore Modeling, 3D-QSAR and Molecular Docking of Furanochalcones as Inhibitors of Monoamine Oxidase-B. Cent Nerv Syst Agents Med Chem 2016; 16:105-111. [PMID: 25788143 DOI: 10.2174/1871524915666150319122540] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Revised: 03/12/2015] [Accepted: 03/18/2015] [Indexed: 06/04/2023]
Abstract
Monoamine oxidase B inhibitors are of particular importance in the treatment of neurodegenerative disorders such as Alzheimer's and Parkinson's disease. Herein described is pharmacophore generation and atom-based 3D-QSAR analysis of previously reported furan based MAO-B inhibitors in order to get insight into their structural requirements responsible for high affinity. The best pharmacophore model generated with the five-point hypotheses of ADHRR: hydrogen bond acceptor (A), hydrogen bond donor (D), hydrophobic (H) and two aromatic rings (R1 & R2). On the basis of generated model, a statistically valid 3D-QSAR with good predictability was developed. Molecular docking of lead compound showed binding energy of -8.66 kcal/mol with a predicted inhibition constant of 0.448 μM towards MAO-B.
Collapse
Affiliation(s)
- Bijo Mathew
- Division of Drug Design and Medicinal Chemistry Research Lab., Department of Pharmaceutical Chemistry, Grace College of Pharmacy, Palakkad, Kerala, India.
| | | | | | | | | | | | | | | |
Collapse
|
41
|
Feder A, Burger J, Gao S, Lewinsohn E, Katzir N, Schaffer AA, Meir A, Davidovich-Rikanati R, Portnoy V, Gal-On A, Fei Z, Kashi Y, Tadmor Y. A Kelch Domain-Containing F-Box Coding Gene Negatively Regulates Flavonoid Accumulation in Muskmelon. Plant Physiol 2015; 169:1714-26. [PMID: 26358418 PMCID: PMC4634078 DOI: 10.1104/pp.15.01008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 09/10/2015] [Indexed: 05/19/2023]
Abstract
The flavonoids are phenylpropanoid-derived metabolites that are ubiquitous in plants, playing many roles in growth and development. Recently, we observed that fruit rinds of yellow casaba muskmelons (Cucumis melo 'Inodorous Group') accumulate naringenin chalcone, a yellow flavonoid pigment. With RNA-sequencing analysis of bulked segregants representing the tails of a population segregating for naringenin chalcone accumulation followed by fine mapping and genetic transformation, we identified a Kelch domain-containing F-box protein coding (CmKFB) gene that, when expressed, negatively regulates naringenin chalcone accumulation. Additional metabolite analysis indicated that downstream flavonoids are accumulated together with naringenin chalcone, whereas CmKFB expression diverts the biochemical flux toward coumarins and general phenylpropanoids. These results show that CmKFB functions as a posttranscriptional regulator that diverts flavonoid metabolic flux.
Collapse
Affiliation(s)
- Ari Feder
- Cucurbit Section, Newe Ya'ar Research Center, Agricultural Research Organization (ARO), Ramat Yishay 3009500, Israel (A.F., J.B., E.L., N.K., A.M., R.D.-R., V.P., Y.T.);Faculty of Biotechnology and Food Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel (A.F., Y.K.);Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 (S.G., Z.F.); andPlant Science (A.A.S.) andPlant Protection (A.G.) Institutes, ARO, The Volcani Center, Bet Dagan 50250, Israel
| | - Joseph Burger
- Cucurbit Section, Newe Ya'ar Research Center, Agricultural Research Organization (ARO), Ramat Yishay 3009500, Israel (A.F., J.B., E.L., N.K., A.M., R.D.-R., V.P., Y.T.);Faculty of Biotechnology and Food Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel (A.F., Y.K.);Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 (S.G., Z.F.); andPlant Science (A.A.S.) andPlant Protection (A.G.) Institutes, ARO, The Volcani Center, Bet Dagan 50250, Israel
| | - Shan Gao
- Cucurbit Section, Newe Ya'ar Research Center, Agricultural Research Organization (ARO), Ramat Yishay 3009500, Israel (A.F., J.B., E.L., N.K., A.M., R.D.-R., V.P., Y.T.);Faculty of Biotechnology and Food Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel (A.F., Y.K.);Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 (S.G., Z.F.); andPlant Science (A.A.S.) andPlant Protection (A.G.) Institutes, ARO, The Volcani Center, Bet Dagan 50250, Israel
| | - Efraim Lewinsohn
- Cucurbit Section, Newe Ya'ar Research Center, Agricultural Research Organization (ARO), Ramat Yishay 3009500, Israel (A.F., J.B., E.L., N.K., A.M., R.D.-R., V.P., Y.T.);Faculty of Biotechnology and Food Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel (A.F., Y.K.);Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 (S.G., Z.F.); andPlant Science (A.A.S.) andPlant Protection (A.G.) Institutes, ARO, The Volcani Center, Bet Dagan 50250, Israel
| | - Nurit Katzir
- Cucurbit Section, Newe Ya'ar Research Center, Agricultural Research Organization (ARO), Ramat Yishay 3009500, Israel (A.F., J.B., E.L., N.K., A.M., R.D.-R., V.P., Y.T.);Faculty of Biotechnology and Food Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel (A.F., Y.K.);Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 (S.G., Z.F.); andPlant Science (A.A.S.) andPlant Protection (A.G.) Institutes, ARO, The Volcani Center, Bet Dagan 50250, Israel
| | - Arthur A Schaffer
- Cucurbit Section, Newe Ya'ar Research Center, Agricultural Research Organization (ARO), Ramat Yishay 3009500, Israel (A.F., J.B., E.L., N.K., A.M., R.D.-R., V.P., Y.T.);Faculty of Biotechnology and Food Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel (A.F., Y.K.);Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 (S.G., Z.F.); andPlant Science (A.A.S.) andPlant Protection (A.G.) Institutes, ARO, The Volcani Center, Bet Dagan 50250, Israel
| | - Ayala Meir
- Cucurbit Section, Newe Ya'ar Research Center, Agricultural Research Organization (ARO), Ramat Yishay 3009500, Israel (A.F., J.B., E.L., N.K., A.M., R.D.-R., V.P., Y.T.);Faculty of Biotechnology and Food Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel (A.F., Y.K.);Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 (S.G., Z.F.); andPlant Science (A.A.S.) andPlant Protection (A.G.) Institutes, ARO, The Volcani Center, Bet Dagan 50250, Israel
| | - Rachel Davidovich-Rikanati
- Cucurbit Section, Newe Ya'ar Research Center, Agricultural Research Organization (ARO), Ramat Yishay 3009500, Israel (A.F., J.B., E.L., N.K., A.M., R.D.-R., V.P., Y.T.);Faculty of Biotechnology and Food Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel (A.F., Y.K.);Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 (S.G., Z.F.); andPlant Science (A.A.S.) andPlant Protection (A.G.) Institutes, ARO, The Volcani Center, Bet Dagan 50250, Israel
| | - Vitaly Portnoy
- Cucurbit Section, Newe Ya'ar Research Center, Agricultural Research Organization (ARO), Ramat Yishay 3009500, Israel (A.F., J.B., E.L., N.K., A.M., R.D.-R., V.P., Y.T.);Faculty of Biotechnology and Food Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel (A.F., Y.K.);Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 (S.G., Z.F.); andPlant Science (A.A.S.) andPlant Protection (A.G.) Institutes, ARO, The Volcani Center, Bet Dagan 50250, Israel
| | - Amit Gal-On
- Cucurbit Section, Newe Ya'ar Research Center, Agricultural Research Organization (ARO), Ramat Yishay 3009500, Israel (A.F., J.B., E.L., N.K., A.M., R.D.-R., V.P., Y.T.);Faculty of Biotechnology and Food Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel (A.F., Y.K.);Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 (S.G., Z.F.); andPlant Science (A.A.S.) andPlant Protection (A.G.) Institutes, ARO, The Volcani Center, Bet Dagan 50250, Israel
| | - Zhangjun Fei
- Cucurbit Section, Newe Ya'ar Research Center, Agricultural Research Organization (ARO), Ramat Yishay 3009500, Israel (A.F., J.B., E.L., N.K., A.M., R.D.-R., V.P., Y.T.);Faculty of Biotechnology and Food Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel (A.F., Y.K.);Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 (S.G., Z.F.); andPlant Science (A.A.S.) andPlant Protection (A.G.) Institutes, ARO, The Volcani Center, Bet Dagan 50250, Israel
| | - Yechezkel Kashi
- Cucurbit Section, Newe Ya'ar Research Center, Agricultural Research Organization (ARO), Ramat Yishay 3009500, Israel (A.F., J.B., E.L., N.K., A.M., R.D.-R., V.P., Y.T.);Faculty of Biotechnology and Food Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel (A.F., Y.K.);Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 (S.G., Z.F.); andPlant Science (A.A.S.) andPlant Protection (A.G.) Institutes, ARO, The Volcani Center, Bet Dagan 50250, Israel
| | - Yaakov Tadmor
- Cucurbit Section, Newe Ya'ar Research Center, Agricultural Research Organization (ARO), Ramat Yishay 3009500, Israel (A.F., J.B., E.L., N.K., A.M., R.D.-R., V.P., Y.T.);Faculty of Biotechnology and Food Engineering, Technion, Israel Institute of Technology, Haifa 32000, Israel (A.F., Y.K.);Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853 (S.G., Z.F.); andPlant Science (A.A.S.) andPlant Protection (A.G.) Institutes, ARO, The Volcani Center, Bet Dagan 50250, Israel
| |
Collapse
|
42
|
Ng JLP, Hassan S, Truong TT, Hocart CH, Laffont C, Frugier F, Mathesius U. Flavonoids and Auxin Transport Inhibitors Rescue Symbiotic Nodulation in the Medicago truncatula Cytokinin Perception Mutant cre1. Plant Cell 2015; 27:2210-26. [PMID: 26253705 PMCID: PMC4568502 DOI: 10.1105/tpc.15.00231] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 06/18/2015] [Accepted: 07/08/2015] [Indexed: 05/18/2023]
Abstract
Initiation of symbiotic nodules in legumes requires cytokinin signaling, but its mechanism of action is largely unknown. Here, we tested whether the failure to initiate nodules in the Medicago truncatula cytokinin perception mutant cre1 (cytokinin response1) is due to its altered ability to regulate auxin transport, auxin accumulation, and induction of flavonoids. We found that in the cre1 mutant, symbiotic rhizobia cannot locally alter acro- and basipetal auxin transport during nodule initiation and that these mutants show reduced auxin (indole-3-acetic acid) accumulation and auxin responses compared with the wild type. Quantification of flavonoids, which can act as endogenous auxin transport inhibitors, showed a deficiency in the induction of free naringenin, isoliquiritigenin, quercetin, and hesperetin in cre1 roots compared with wild-type roots 24 h after inoculation with rhizobia. Coinoculation of roots with rhizobia and the flavonoids naringenin, isoliquiritigenin, and kaempferol, or with the synthetic auxin transport inhibitor 2,3,5,-triiodobenzoic acid, rescued nodulation efficiency in cre1 mutants and allowed auxin transport control in response to rhizobia. Our results suggest that CRE1-dependent cytokinin signaling leads to nodule initiation through the regulation of flavonoid accumulation required for local alteration of polar auxin transport and subsequent auxin accumulation in cortical cells during the early stages of nodulation.
Collapse
Affiliation(s)
- Jason Liang Pin Ng
- Division of Plant Science, Research School of Biology, Australian National University, Canberra ACT 2601, Australia
| | - Samira Hassan
- Division of Plant Science, Research School of Biology, Australian National University, Canberra ACT 2601, Australia
| | - Thy T Truong
- Mass Spectrometry Facility, Research School of Biology, Australian National University, Canberra ACT 2601, Australia
| | - Charles H Hocart
- Mass Spectrometry Facility, Research School of Biology, Australian National University, Canberra ACT 2601, Australia
| | - Carole Laffont
- Institute of Plant Sciences-Paris Saclay University (IPS2), UMR 9213/UMR 1403, CNRS/INRA/Université Paris-Sud/Université Paris-Diderot/Université d'Evry, 91405 Orsay, France
| | - Florian Frugier
- Institute of Plant Sciences-Paris Saclay University (IPS2), UMR 9213/UMR 1403, CNRS/INRA/Université Paris-Sud/Université Paris-Diderot/Université d'Evry, 91405 Orsay, France
| | - Ulrike Mathesius
- Division of Plant Science, Research School of Biology, Australian National University, Canberra ACT 2601, Australia
| |
Collapse
|
43
|
Zenger K, Agnolet S, Schneider B, Kraus B. Biotransformation of Flavokawains A, B, and C, Chalcones from Kava (Piper methysticum), by Human Liver Microsomes. J Agric Food Chem 2015; 63:6376-6385. [PMID: 26123050 DOI: 10.1021/acs.jafc.5b01858] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The in vitro metabolism of flavokawains A, B, and C (FKA, FKB, FKC), methoxylated chalcones from Piper methysticum, was examined using human liver microsomes. Phase I metabolism and phase II metabolism (glucuronidation) as well as combined phase I+II metabolism were studied. For identification and structure elucidation of microsomal metabolites, LC-HRESIMS and NMR techniques were applied. Major phase I metabolites were generated by demethylation in position C-4 or C-4' and hydroxylation predominantly in position C-4, yielding FKC as phase I metabolite of FKA and FKB, helichrysetin as metabolite of FKA and FKC, and cardamonin as metabolite of FKC. To an even greater extent, flavokawains were metabolized in the presence of uridine diphosphate (UDP) glucuronic acid by microsomal UDP-glucuronosyl transferases. For all flavokawains, monoglucuronides (FKA-2'-O-glucuronide, FKB-2'-O-glucuronide, FKC-2'-O-glucuronide, FKC-4-O-glucuronide) were found as major phase II metabolites. The dominance of generated glucuronides suggests a role of conjugated chalcones as potential active compounds in vivo.
Collapse
Affiliation(s)
- Katharina Zenger
- †Pharmaceutical Biology, Institute of Pharmacy, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Sara Agnolet
- §Max-Planck-Institute for Chemical Ecology, Beutenberg Campus, Hans-Knöll-Straße 8, 07745 Jena, Germany
| | - Bernd Schneider
- §Max-Planck-Institute for Chemical Ecology, Beutenberg Campus, Hans-Knöll-Straße 8, 07745 Jena, Germany
| | - Birgit Kraus
- †Pharmaceutical Biology, Institute of Pharmacy, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
| |
Collapse
|
44
|
Choi YH, Kim YJ, Chae HS, Chin YW. In vivo gastroprotective effect along with pharmacokinetics, tissue distribution and metabolism of isoliquiritigenin in mice. Planta Med 2015; 81:586-593. [PMID: 25875506 DOI: 10.1055/s-0035-1545914] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
As numerous herbal products have been used as dietary supplements or functional foods, the demands of the pharmacokinetic and pharmacodynamic characteristics of active compounds are increasing in order to secure a consistent outcome (i.e., efficiency and safety). In this study, the pharmacokinetics including tissue distribution, metabolism, and protein binding of isoliquiritigenin, a chalcone found in Glycyrrhiza glabra, and its metabolite, liquiritigenin, at various doses in mice are reported. Also, correlations between the preferential tissue distribution and pharmacological effect of isoliquiritigenin in certain organs were investigated using the in vivo gastroprotective effect of isoliquiritigenin in mice with indomethacin-induced ulcer. The absorbed fraction of isoliquiritigenin was high, but the absolute bioavailability was low mainly due to its metabolism. In spite of the low bioavailability, the gastroprotective effect of isoliquiritigenin was attributed to its high distribution in the stomach. Isoliquiritigenin prevented the occurrence of gastric ulcers by indomethacin, which is associated with increased gastric mucous secretion because the pretreatment with isoliquiritigenin presumably counteracted the decreased cyclooxygenase 2 by indomethacin. This may suggest that the pharmacokinetic properties of isoliquiritigenin are useful to predict its efficacy as a gastroprotective agent in a target organ such as the stomach.
Collapse
Affiliation(s)
- Young Hee Choi
- College of Pharmacy and BK21 PLUS R-FIND Team, Dongguk University-Seoul, Goyang, Gyeonggi-do, South Korea
| | - You-Jin Kim
- College of Pharmacy and BK21 PLUS R-FIND Team, Dongguk University-Seoul, Goyang, Gyeonggi-do, South Korea
| | - Hee-Sung Chae
- College of Pharmacy and BK21 PLUS R-FIND Team, Dongguk University-Seoul, Goyang, Gyeonggi-do, South Korea
| | - Young-Won Chin
- College of Pharmacy and BK21 PLUS R-FIND Team, Dongguk University-Seoul, Goyang, Gyeonggi-do, South Korea
| |
Collapse
|
45
|
Song NR, Kim JE, Park JS, Kim JR, Kang H, Lee E, Kang YG, Son JE, Seo SG, Heo YS, Lee KW. Licochalcone A, a polyphenol present in licorice, suppresses UV-induced COX-2 expression by targeting PI3K, MEK1, and B-Raf. Int J Mol Sci 2015; 16:4453-70. [PMID: 25710724 PMCID: PMC4394430 DOI: 10.3390/ijms16034453] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 01/21/2015] [Accepted: 02/03/2015] [Indexed: 12/02/2022] Open
Abstract
Licorice is a traditional botanical medicine, and has historically been commonly prescribed in Asia to treat various diseases. Glycyrrhizin (Gc), a triterpene compound, is the most abundant phytochemical constituent of licorice. However, high intake or long-term consumption of Gc has been associated with a number of side effects, including hypertension. However, the presence of alternative bioactive compounds in licorice with anti-carcinogenic effects has long been suspected. Licochalcone A (LicoA) is a prominent member of the chalcone family and can be isolated from licorice root. To date, there have been no reported studies on the suppressive effect of LicoA against solar ultraviolet (sUV)-induced cyclooxygenase (COX)-2 expression and the potential molecular mechanisms involved. Here, we show that LicoA, a major chalcone compound of licorice, effectively inhibits sUV-induced COX-2 expression and prostaglandin E2 PGE2 generation through the inhibition of activator protein 1 AP-1 transcriptional activity, with an effect that is notably more potent than Gc. Western blotting analysis shows that LicoA suppresses sUV-induced phosphorylation of Akt/ mammalian target of rapamycin (mTOR) and extracellular signal-regulated kinases (ERK)1/2/p90 ribosomal protein S6 kinase (RSK) in HaCaT cells. Moreover, LicoA directly suppresses the activity of phosphoinositide 3-kinase (PI3K), mitogen-activated protein kinase kinase (MEK)1, and B-Raf, but not Raf-1 in cell-free assays, indicating that PI3K, MEK1, and B-Raf are direct molecular targets of LicoA. We also found that LicoA binds to PI3K and B-Raf in an ATP-competitive manner, although LicoA does not appear to compete with ATP for binding with MEK1. Collectively, these results provide insight into the biological action of LicoA, which may have potential for development as a skin cancer chemopreventive agent.
Collapse
Affiliation(s)
- Nu Ry Song
- WCU Biomodulation Major, Center for Food and Bioconvergence, Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-742, Korea.
- Advanced Institute of Convergence Technology, Seoul National University, Suwon, 443-270, Korea.
| | - Jong-Eun Kim
- WCU Biomodulation Major, Center for Food and Bioconvergence, Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-742, Korea.
- Advanced Institute of Convergence Technology, Seoul National University, Suwon, 443-270, Korea.
| | - Jun Seong Park
- Skin Research Institute, Amorepacific R&D Center, Yongin, 446-829, Korea.
| | - Jong Rhan Kim
- WCU Biomodulation Major, Center for Food and Bioconvergence, Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-742, Korea.
- Advanced Institute of Convergence Technology, Seoul National University, Suwon, 443-270, Korea.
| | - Heerim Kang
- WCU Biomodulation Major, Center for Food and Bioconvergence, Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-742, Korea.
- Advanced Institute of Convergence Technology, Seoul National University, Suwon, 443-270, Korea.
| | - Eunjung Lee
- WCU Biomodulation Major, Center for Food and Bioconvergence, Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-742, Korea.
- Advanced Institute of Convergence Technology, Seoul National University, Suwon, 443-270, Korea.
- Traditional Alcoholic Beverage Research Team, Korea Food Research Institute, Seongnam 463-746, Korea.
| | - Young-Gyu Kang
- Skin Research Institute, Amorepacific R&D Center, Yongin, 446-829, Korea.
| | - Joe Eun Son
- WCU Biomodulation Major, Center for Food and Bioconvergence, Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-742, Korea.
- Advanced Institute of Convergence Technology, Seoul National University, Suwon, 443-270, Korea.
| | - Sang Gwon Seo
- WCU Biomodulation Major, Center for Food and Bioconvergence, Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-742, Korea.
- Advanced Institute of Convergence Technology, Seoul National University, Suwon, 443-270, Korea.
| | - Yong Seok Heo
- Department of Chemistry, Konkuk University, Seoul, 143-701, Korea.
| | - Ki Won Lee
- WCU Biomodulation Major, Center for Food and Bioconvergence, Department of Agricultural Biotechnology, Seoul National University, Seoul, 151-742, Korea.
- Advanced Institute of Convergence Technology, Seoul National University, Suwon, 443-270, Korea.
| |
Collapse
|
46
|
Yu HN, Wang L, Sun B, Gao S, Cheng AX, Lou HX. Functional characterization of a chalcone synthase from the liverwort Plagiochasma appendiculatum. Plant Cell Rep 2015; 34:233-45. [PMID: 25404490 DOI: 10.1007/s00299-014-1702-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 09/24/2014] [Accepted: 10/20/2014] [Indexed: 05/04/2023]
Abstract
A chalcone synthase gene ( PaCHS ) was isolated and functionally characterized from liverwort. The ectopic expression of PaCHS in Marchantia paleacea callus raised the flavonoids content. Chalcone synthase (CHS; EC 2.3.1.74) is pivotal for the biosynthesis of flavonoid and anthocyanin pigments in plants. It produces naringenin chalcone by condensing one p-coumaroyl- and three malonyl-coenzyme A thioesters through a polyketide intermediate that is cyclized by intramolecular Claisen condensation. Although CHSs of higher plants have been extensively studied, enzyme properties of the CHSs in liverworts have been scarcely characterized. In this study, we report the cloning and characterization of CHS (designated as PaCHS) from the liverwort Plagiochasma appendiculatum. The gene product was 60-70 % identical with chalcone synthases from other species, and contained the characteristic conserved Cys-His-Asn catalytic triad. The recombinant PaCHS was able to catalyze p-coumaroyl-CoA and malonyl-CoA to generate naringenin in vitro. Heterologously expressed PaCHS protein showed similar kinetic properties to those of higher plant CHS. The ectopic expression of PaCHS in Marchantia paleacea callus raised the content of the total flavonoids. These results suggested that PaCHS played a key role in the flavonoids biosynthesis in liverworts. Furthermore, when the thallus of P. appendiculatum was treated with abiotic stress inducers methyl jasmonate, salicylic acid and abscisic acid, PaCHS expression was enhanced. This is the first time that a CHS in liverworts has been functionally characterized.
Collapse
Affiliation(s)
- Hai-Na Yu
- Key Laboratory of Chemical Biology of Natural Products, Ministry of Education School of Pharmaceutical Sciences, Shandong University, Jinan, 250012, China
| | | | | | | | | | | |
Collapse
|
47
|
Ibdah M, Berim A, Martens S, Valderrama ALH, Palmieri L, Lewinsohn E, Gang DR. Identification and cloning of an NADPH-dependent hydroxycinnamoyl-CoA double bond reductase involved in dihydrochalcone formation in Malus×domestica Borkh. Phytochemistry 2014; 107:24-31. [PMID: 25152451 DOI: 10.1016/j.phytochem.2014.07.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 07/10/2014] [Accepted: 07/11/2014] [Indexed: 05/14/2023]
Abstract
The apple tree (Malus sp.) is an agriculturally and economically important source of food and beverages. Many of the health beneficial properties of apples are due to (poly)phenolic metabolites that they contain, including various dihydrochalcones. Although many of the genes and enzymes involved in polyphenol biosynthesis are known in many plant species, the specific reactions that lead to the biosynthesis of the dihydrochalcone precursor, p-dihydrocoumaroyl-CoA (3), are unknown. To identify genes involved in the synthesis of these metabolites, existing genome databases of the Rosaceae were screened for apple genes with significant sequence similarity to Arabidopsis alkenal double bond reductases. Herein described are the isolation and characterization of a Malus hydroxycinnamoyl-CoA double bond reductase, which catalyzed the NADPH-dependent reduction of p-coumaroyl-CoA and feruloyl-CoA to p-dihydrocoumaroyl-CoA and dihydroferuloyl-CoA, respectively. Its apparent Km values for p-coumaroyl-CoA, feruloyl-CoA and NADPH were 96.6, 92.9 and 101.3μM, respectively. The Malus double bond reductase preferred feruloyl-CoA to p-coumaroyl-CoA as a substrate by a factor of 2.1 when comparing catalytic efficiencies in vitro. Expression analysis of the hydroxycinnamoyl-CoA double bond reductase gene revealed that its transcript levels showed significant variation in tissues of different developmental stages, but was expressed when expected for involvement in dihydrochalcone formation. Thus, the hydroxycinnamoyl-CoA double bond reductase appears to be responsible for the reduction of the α,β-unsaturated double bond of p-coumaroyl-CoA, the first step of dihydrochalcone biosynthesis in apple tissues, and may be involved in the production of these compounds.
Collapse
Affiliation(s)
- Mwafaq Ibdah
- Institute of Biological Chemistry, Washington State University, PO Box 646340, Pullman, WA 99164-6340, USA; NeweYaar Research Center, Agriculture Research Organization, PO Box 1021, Ramat Yishay 30095, Israel
| | - Anna Berim
- Institute of Biological Chemistry, Washington State University, PO Box 646340, Pullman, WA 99164-6340, USA
| | - Stefan Martens
- Fondazione Edmund Mach, Centro Ricerca e Innovazione, Department of Food Quality and Nutrition, Via E. Mach, 1 - 38010 San Michele all'Adige (TN), Italy
| | - Andrea Lorena Herrera Valderrama
- Fondazione Edmund Mach, Centro Ricerca e Innovazione, Department of Food Quality and Nutrition, Via E. Mach, 1 - 38010 San Michele all'Adige (TN), Italy
| | - Luisa Palmieri
- Fondazione Edmund Mach, Centro Ricerca e Innovazione, Department of Food Quality and Nutrition, Via E. Mach, 1 - 38010 San Michele all'Adige (TN), Italy
| | - Efraim Lewinsohn
- NeweYaar Research Center, Agriculture Research Organization, PO Box 1021, Ramat Yishay 30095, Israel
| | - David R Gang
- Institute of Biological Chemistry, Washington State University, PO Box 646340, Pullman, WA 99164-6340, USA.
| |
Collapse
|
48
|
Simmler C, Jones T, Anderson JR, Nikolić DC, van Breemen RB, Soejarto DD, Chen SN, Pauli GF. Species-specific Standardisation of Licorice by Metabolomic Profiling of Flavanones and Chalcones. Phytochem Anal 2014; 25:378-88. [PMID: 25859589 PMCID: PMC4391967 DOI: 10.1002/pca.2472] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
INTRODUCTION Major phenolics from licorice roots (Glycyrrhiza sp.) are glycosides of the flavanone liquiritigenin (F) and its 2′-hydroxychalcone isomer, isoliquiritigenin (C). As the F and C contents fluctuate between batches of licorice, both quality control and standardisation of its preparations become complex tasks. OBJECTIVE To characterise the F and C metabolome in extracts from Glycyrrhiza glabra L. and Glycyrrhiza uralensis Fisch. ex DC. by addressing their composition in major F–C pairs and defining the total F:C proportion. MATERIAL AND METHODS Three types of extracts from DNA-authenticated samples were analysed by a validated UHPLC/UV method to quantify major F and C glycosides. Each extract was characterised by the identity of major F–C pairs and the proportion of Fs among all quantified Fs:Cs. RESULTS The F and C compositions and proportions were found to be constant for all extracts from a Glycyrrhiza species. All G. uralensis extracts contained up to 2.5 more Fs than G. glabra extracts. Major F–C pairs were B-ring glycosidated in G. uralensis, and A-/B-ring apiosyl-glucosidated in the G. glabra extracts. The F:C proportion was found to be linked to the glycosidation site: the more B-ring F-C glycosides were present, the higher was the final F:C proportion in the extract. These results enable the chemical differentiation of extracts from G. uralensis and G. glabra, which are characterised by total F:C proportions of 8.37:1.63 and 7.18:2.82, respectively. CONCLUSION Extracts from G. glabra and G. uralensis can be differentiated by their respective F and C compositions and proportions, which are both useful for further standardisation of licorice botanicals.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Guido F. Pauli
- Correspondence to: G. F. Pauli, UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois, 833 S. Wood Street, Chicago, Illinois, 60612, USA.
| |
Collapse
|
49
|
Gaucher M, Dugé de Bernonville T, Guyot S, Dat JF, Brisset MN. Same ammo, different weapons: enzymatic extracts from two apple genotypes with contrasted susceptibilities to fire blight (Erwinia amylovora) differentially convert phloridzin and phloretin in vitro. Plant Physiol Biochem 2013; 72:178-89. [PMID: 23561298 DOI: 10.1016/j.plaphy.2013.03.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Accepted: 03/13/2013] [Indexed: 05/14/2023]
Abstract
The necrogenic bacterium Erwinia amylovora responsible for the fire blight disease causes cell death in apple tissues to enrich intercellular spaces with nutrients. Apple leaves contain large amounts of dihydrochalcones (DHCs), including phloridzin and its aglycone phloretin. Previous work showed an important decrease in the constitutive DHCs stock in infected leaves, probably caused by transformation reactions during the infection process. At least two flavonoid transformation pathways have been described so far: deglucosylation and oxidation. The aim of the present study was to determine whether DHCs are differentially converted in two apple genotypes displaying contrasted susceptibilities to the disease. Different analyses were performed: i) enzymatic activity assays in infected leaves, ii) identification/quantification of end-products obtained after in vitro enzymatic reactions with DHCs, iii) evaluation of the bactericidal activity of end-products. The results of the enzymatic assays showed that deglucosylation was dominant over oxidation in the susceptible genotype MM106 while the opposite was observed in the resistant genotype Evereste. These data were confirmed by LC-UV/Vis-MS analysis of in vitro reaction mixtures, especially because higher levels of o-quinoid oxidation products of phloretin were measured by using the enzymatic extracts of Evereste infected leaves. Their presence correlated well with a strong bactericidal activity of the reaction mixtures. Thus, our results suggest that a differential transformation of DHCs occur in apple genotypes with a potential involvement in the establishment of the susceptibility or the resistance to fire blight, through the release of glucose or of highly bactericidal compounds respectively.
Collapse
Affiliation(s)
- Matthieu Gaucher
- INRA, UMR1345 Institut de Recherche en Horticulture et Semences, F-49071 Angers, France; Université d'Angers, UMR1345 Institut de Recherche en Horticulture et Semences, F-49071 Angers, France; Agrocampus-Ouest, UMR1345 Institut de Recherche en Horticulture et Semences, F-49071 Angers, France
| | | | | | | | | |
Collapse
|
50
|
Lee YK, Chin YW, Bae JK, Seo JS, Choi YH. Pharmacokinetics of isoliquiritigenin and its metabolites in rats: low bioavailability is primarily due to the hepatic and intestinal metabolism. Planta Med 2013; 79:1656-1665. [PMID: 24108436 DOI: 10.1055/s-0033-1350924] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Isoliquiritigenin, a chalcone found in licorice has shown a variety of biological activities including antioxidative, anti-inflammatory, estrogenic, chemopreventive and antitumor effects. Thus, pharmacokinetics of isoliquiritigenin and its metabolites [liquiritigenin, glucuronidated isoliquiritigenin (M1), and glucuronidated liquiritigenin (M2)] after intravenous and oral administration of isoliquiritigenin was evaluated in rats. The pharmacokinetics of isoliquiritigenin, liquiritigenin, M1, and M2 showed no dose dependence after both intravenous and oral administration of isoliquiritigenin. Although approximately 92.0 % of the oral isoliquiritigenin was absorbed, the extent of the absolute bioavailability value was only 11.8 % of the oral dose. The low absolute bioavailability value of isoliquiritigenin might be due to the considerable metabolism of isoliquiritigenin in the small intestine and liver. This was supported by the facts that the ratios of AUC(M1)/AUC(isoLQ) and AUC(M2)/AUC(isoLQ) were high (over 0.25), isoliquiritigenin disappeared, and M1 and M2 were formed mainly in S9 fractions of the liver and small intestine. The affinities of liquiritigenin, isoliquiritigenin, M1, and M2 were high in the liver, small intestine, large intestine, and/or kidney.
Collapse
Affiliation(s)
- Yu Kyung Lee
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Dongguk University-Seoul, Goyang, Gyeonggi-do, South Korea
| | | | | | | | | |
Collapse
|